static LIST_HEAD(container_list);
static DEFINE_MUTEX(container_list_lock);
static struct class enclosure_class;
-static struct class enclosure_component_class;
/**
- * enclosure_find - find an enclosure given a device
- * @dev: the device to find for
+ * enclosure_find - find an enclosure given a parent device
+ * @dev: the parent to match against
+ * @start: Optional enclosure device to start from (NULL if none)
*
- * Looks through the list of registered enclosures to see
- * if it can find a match for a device. Returns NULL if no
- * enclosure is found. Obtains a reference to the enclosure class
- * device which must be released with class_device_put().
+ * Looks through the list of registered enclosures to find all those
+ * with @dev as a parent. Returns NULL if no enclosure is
+ * found. @start can be used as a starting point to obtain multiple
+ * enclosures per parent (should begin with NULL and then be set to
+ * each returned enclosure device). Obtains a reference to the
+ * enclosure class device which must be released with device_put().
+ * If @start is not NULL, a reference must be taken on it which is
+ * released before returning (this allows a loop through all
+ * enclosures to exit with only the reference on the enclosure of
+ * interest held). Note that the @dev may correspond to the actual
+ * device housing the enclosure, in which case no iteration via @start
+ * is required.
*/
-struct enclosure_device *enclosure_find(struct device *dev)
+struct enclosure_device *enclosure_find(struct device *dev,
+ struct enclosure_device *start)
{
- struct enclosure_device *edev = NULL;
+ struct enclosure_device *edev;
mutex_lock(&container_list_lock);
- list_for_each_entry(edev, &container_list, node) {
- if (edev->cdev.dev == dev) {
- class_device_get(&edev->cdev);
- mutex_unlock(&container_list_lock);
- return edev;
+ edev = list_prepare_entry(start, &container_list, node);
+ if (start)
+ put_device(&start->edev);
+
+ list_for_each_entry_continue(edev, &container_list, node) {
+ struct device *parent = edev->edev.parent;
+ /* parent might not be immediate, so iterate up to
+ * the root of the tree if necessary */
+ while (parent) {
+ if (parent == dev) {
+ get_device(&edev->edev);
+ mutex_unlock(&container_list_lock);
+ return edev;
+ }
+ parent = parent->parent;
}
}
mutex_unlock(&container_list_lock);
edev->components = components;
- edev->cdev.class = &enclosure_class;
- edev->cdev.dev = get_device(dev);
+ edev->edev.class = &enclosure_class;
+ edev->edev.parent = get_device(dev);
edev->cb = cb;
- snprintf(edev->cdev.class_id, BUS_ID_SIZE, "%s", name);
- err = class_device_register(&edev->cdev);
+ dev_set_name(&edev->edev, "%s", name);
+ err = device_register(&edev->edev);
if (err)
goto err;
return edev;
err:
- put_device(edev->cdev.dev);
+ put_device(edev->edev.parent);
kfree(edev);
return ERR_PTR(err);
}
for (i = 0; i < edev->components; i++)
if (edev->component[i].number != -1)
- class_device_unregister(&edev->component[i].cdev);
+ device_unregister(&edev->component[i].cdev);
/* prevent any callbacks into service user */
edev->cb = &enclosure_null_callbacks;
- class_device_unregister(&edev->cdev);
+ device_unregister(&edev->edev);
}
EXPORT_SYMBOL_GPL(enclosure_unregister);
-static void enclosure_release(struct class_device *cdev)
+#define ENCLOSURE_NAME_SIZE 64
+
+static void enclosure_link_name(struct enclosure_component *cdev, char *name)
+{
+ strcpy(name, "enclosure_device:");
+ strcat(name, dev_name(&cdev->cdev));
+}
+
+static void enclosure_remove_links(struct enclosure_component *cdev)
+{
+ char name[ENCLOSURE_NAME_SIZE];
+
+ enclosure_link_name(cdev, name);
+ sysfs_remove_link(&cdev->dev->kobj, name);
+ sysfs_remove_link(&cdev->cdev.kobj, "device");
+}
+
+static int enclosure_add_links(struct enclosure_component *cdev)
+{
+ int error;
+ char name[ENCLOSURE_NAME_SIZE];
+
+ error = sysfs_create_link(&cdev->cdev.kobj, &cdev->dev->kobj, "device");
+ if (error)
+ return error;
+
+ enclosure_link_name(cdev, name);
+ error = sysfs_create_link(&cdev->dev->kobj, &cdev->cdev.kobj, name);
+ if (error)
+ sysfs_remove_link(&cdev->cdev.kobj, "device");
+
+ return error;
+}
+
+static void enclosure_release(struct device *cdev)
{
struct enclosure_device *edev = to_enclosure_device(cdev);
- put_device(cdev->dev);
+ put_device(cdev->parent);
kfree(edev);
}
-static void enclosure_component_release(struct class_device *cdev)
+static void enclosure_component_release(struct device *dev)
{
- if (cdev->dev)
+ struct enclosure_component *cdev = to_enclosure_component(dev);
+
+ if (cdev->dev) {
+ enclosure_remove_links(cdev);
put_device(cdev->dev);
- class_device_put(cdev->parent);
+ }
+ put_device(dev->parent);
}
+static const struct attribute_group *enclosure_groups[];
+
/**
* enclosure_component_register - add a particular component to an enclosure
* @edev: the enclosure to add the component
const char *name)
{
struct enclosure_component *ecomp;
- struct class_device *cdev;
+ struct device *cdev;
int err;
if (number >= edev->components)
ecomp->type = type;
ecomp->number = number;
cdev = &ecomp->cdev;
- cdev->parent = class_device_get(&edev->cdev);
- cdev->class = &enclosure_component_class;
- if (name)
- snprintf(cdev->class_id, BUS_ID_SIZE, "%s", name);
+ cdev->parent = get_device(&edev->edev);
+ if (name && name[0])
+ dev_set_name(cdev, "%s", name);
else
- snprintf(cdev->class_id, BUS_ID_SIZE, "%u", number);
+ dev_set_name(cdev, "%u", number);
+
+ cdev->release = enclosure_component_release;
+ cdev->groups = enclosure_groups;
- err = class_device_register(cdev);
+ err = device_register(cdev);
if (err)
ERR_PTR(err);
int enclosure_add_device(struct enclosure_device *edev, int component,
struct device *dev)
{
- struct class_device *cdev;
+ struct enclosure_component *cdev;
if (!edev || component >= edev->components)
return -EINVAL;
- cdev = &edev->component[component].cdev;
+ cdev = &edev->component[component];
+
+ if (cdev->dev == dev)
+ return -EEXIST;
- class_device_del(cdev);
if (cdev->dev)
- put_device(cdev->dev);
+ enclosure_remove_links(cdev);
+
+ put_device(cdev->dev);
cdev->dev = get_device(dev);
- return class_device_add(cdev);
+ return enclosure_add_links(cdev);
}
EXPORT_SYMBOL_GPL(enclosure_add_device);
* Returns zero on success or an error.
*
*/
-int enclosure_remove_device(struct enclosure_device *edev, int component)
+int enclosure_remove_device(struct enclosure_device *edev, struct device *dev)
{
- struct class_device *cdev;
+ struct enclosure_component *cdev;
+ int i;
- if (!edev || component >= edev->components)
+ if (!edev || !dev)
return -EINVAL;
- cdev = &edev->component[component].cdev;
-
- class_device_del(cdev);
- if (cdev->dev)
- put_device(cdev->dev);
- cdev->dev = NULL;
- return class_device_add(cdev);
+ for (i = 0; i < edev->components; i++) {
+ cdev = &edev->component[i];
+ if (cdev->dev == dev) {
+ enclosure_remove_links(cdev);
+ device_del(&cdev->cdev);
+ put_device(dev);
+ cdev->dev = NULL;
+ return device_add(&cdev->cdev);
+ }
+ }
+ return -ENODEV;
}
EXPORT_SYMBOL_GPL(enclosure_remove_device);
* sysfs pieces below
*/
-static ssize_t enclosure_show_components(struct class_device *cdev, char *buf)
+static ssize_t enclosure_show_components(struct device *cdev,
+ struct device_attribute *attr,
+ char *buf)
{
struct enclosure_device *edev = to_enclosure_device(cdev);
return snprintf(buf, 40, "%d\n", edev->components);
}
-static struct class_device_attribute enclosure_attrs[] = {
+static struct device_attribute enclosure_attrs[] = {
__ATTR(components, S_IRUGO, enclosure_show_components, NULL),
__ATTR_NULL
};
static struct class enclosure_class = {
.name = "enclosure",
.owner = THIS_MODULE,
- .release = enclosure_release,
- .class_dev_attrs = enclosure_attrs,
+ .dev_release = enclosure_release,
+ .dev_attrs = enclosure_attrs,
};
static const char *const enclosure_status [] = {
[ENCLOSURE_COMPONENT_ARRAY_DEVICE] = "array device",
};
-static ssize_t get_component_fault(struct class_device *cdev, char *buf)
+static ssize_t get_component_fault(struct device *cdev,
+ struct device_attribute *attr, char *buf)
{
struct enclosure_device *edev = to_enclosure_device(cdev->parent);
struct enclosure_component *ecomp = to_enclosure_component(cdev);
return snprintf(buf, 40, "%d\n", ecomp->fault);
}
-static ssize_t set_component_fault(struct class_device *cdev, const char *buf,
- size_t count)
+static ssize_t set_component_fault(struct device *cdev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
{
struct enclosure_device *edev = to_enclosure_device(cdev->parent);
struct enclosure_component *ecomp = to_enclosure_component(cdev);
return count;
}
-static ssize_t get_component_status(struct class_device *cdev, char *buf)
+static ssize_t get_component_status(struct device *cdev,
+ struct device_attribute *attr,char *buf)
{
struct enclosure_device *edev = to_enclosure_device(cdev->parent);
struct enclosure_component *ecomp = to_enclosure_component(cdev);
return snprintf(buf, 40, "%s\n", enclosure_status[ecomp->status]);
}
-static ssize_t set_component_status(struct class_device *cdev, const char *buf,
- size_t count)
+static ssize_t set_component_status(struct device *cdev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
{
struct enclosure_device *edev = to_enclosure_device(cdev->parent);
struct enclosure_component *ecomp = to_enclosure_component(cdev);
return -EINVAL;
}
-static ssize_t get_component_active(struct class_device *cdev, char *buf)
+static ssize_t get_component_active(struct device *cdev,
+ struct device_attribute *attr, char *buf)
{
struct enclosure_device *edev = to_enclosure_device(cdev->parent);
struct enclosure_component *ecomp = to_enclosure_component(cdev);
return snprintf(buf, 40, "%d\n", ecomp->active);
}
-static ssize_t set_component_active(struct class_device *cdev, const char *buf,
- size_t count)
+static ssize_t set_component_active(struct device *cdev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
{
struct enclosure_device *edev = to_enclosure_device(cdev->parent);
struct enclosure_component *ecomp = to_enclosure_component(cdev);
return count;
}
-static ssize_t get_component_locate(struct class_device *cdev, char *buf)
+static ssize_t get_component_locate(struct device *cdev,
+ struct device_attribute *attr, char *buf)
{
struct enclosure_device *edev = to_enclosure_device(cdev->parent);
struct enclosure_component *ecomp = to_enclosure_component(cdev);
return snprintf(buf, 40, "%d\n", ecomp->locate);
}
-static ssize_t set_component_locate(struct class_device *cdev, const char *buf,
- size_t count)
+static ssize_t set_component_locate(struct device *cdev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
{
struct enclosure_device *edev = to_enclosure_device(cdev->parent);
struct enclosure_component *ecomp = to_enclosure_component(cdev);
return count;
}
-static ssize_t get_component_type(struct class_device *cdev, char *buf)
+static ssize_t get_component_type(struct device *cdev,
+ struct device_attribute *attr, char *buf)
{
struct enclosure_component *ecomp = to_enclosure_component(cdev);
}
-static struct class_device_attribute enclosure_component_attrs[] = {
- __ATTR(fault, S_IRUGO | S_IWUSR, get_component_fault,
- set_component_fault),
- __ATTR(status, S_IRUGO | S_IWUSR, get_component_status,
- set_component_status),
- __ATTR(active, S_IRUGO | S_IWUSR, get_component_active,
- set_component_active),
- __ATTR(locate, S_IRUGO | S_IWUSR, get_component_locate,
- set_component_locate),
- __ATTR(type, S_IRUGO, get_component_type, NULL),
- __ATTR_NULL
+static DEVICE_ATTR(fault, S_IRUGO | S_IWUSR, get_component_fault,
+ set_component_fault);
+static DEVICE_ATTR(status, S_IRUGO | S_IWUSR, get_component_status,
+ set_component_status);
+static DEVICE_ATTR(active, S_IRUGO | S_IWUSR, get_component_active,
+ set_component_active);
+static DEVICE_ATTR(locate, S_IRUGO | S_IWUSR, get_component_locate,
+ set_component_locate);
+static DEVICE_ATTR(type, S_IRUGO, get_component_type, NULL);
+
+static struct attribute *enclosure_component_attrs[] = {
+ &dev_attr_fault.attr,
+ &dev_attr_status.attr,
+ &dev_attr_active.attr,
+ &dev_attr_locate.attr,
+ &dev_attr_type.attr,
+ NULL
};
-static struct class enclosure_component_class = {
- .name = "enclosure_component",
- .owner = THIS_MODULE,
- .class_dev_attrs = enclosure_component_attrs,
- .release = enclosure_component_release,
+static struct attribute_group enclosure_group = {
+ .attrs = enclosure_component_attrs,
+};
+
+static const struct attribute_group *enclosure_groups[] = {
+ &enclosure_group,
+ NULL
};
static int __init enclosure_init(void)
err = class_register(&enclosure_class);
if (err)
return err;
- err = class_register(&enclosure_component_class);
- if (err)
- goto err_out;
return 0;
- err_out:
- class_unregister(&enclosure_class);
-
- return err;
}
static void __exit enclosure_exit(void)
{
- class_unregister(&enclosure_component_class);
class_unregister(&enclosure_class);
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff