Messages in this thread Patch in this message | | | Date | Wed, 18 Jun 2008 19:08:49 +0200 | From | Benjamin Thery <> | Subject | [PATCH 08/11] driver core: Implement tagged directory support for device classes. |
| |
driver core: Implement tagged directory support for device classes.
This patch enables tagging on every class directory if struct class has tag_ops.
In addition device_del and device_rename were modified to use sysfs_delete_link and sysfs_rename_link respectively to ensure when these operations happen on devices whose classes have tag_ops that they work properly.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Benjamin Thery <benjamin.thery@bull.net> --- drivers/base/class.c | 30 ++++++++++++++++++++++++++---- drivers/base/core.c | 41 +++++++++++++++++++++++------------------ include/linux/device.h | 2 ++ 3 files changed, 51 insertions(+), 22 deletions(-)
Index: linux-mm/drivers/base/class.c =================================================================== --- linux-mm.orig/drivers/base/class.c +++ linux-mm/drivers/base/class.c @@ -135,6 +135,17 @@ static void remove_class_attrs(struct cl } } +static int class_setup_tagging(struct class *cls) +{ + const struct sysfs_tagged_dir_operations *tag_ops; + + tag_ops = cls->tag_ops; + if (!tag_ops) + return 0; + + return sysfs_enable_tagging(&cls->p->class_subsys.kobj, tag_ops); +} + int __class_register(struct class *cls, struct lock_class_key *key) { struct class_private *cp; @@ -171,13 +182,24 @@ int __class_register(struct class *cls, cls->p = cp; error = kset_register(&cp->class_subsys); - if (error) { - kfree(cp); - return error; - } + if (error) + goto out_free_cp; + + error = class_setup_tagging(cls); + if (error) + goto out_unregister; + error = add_class_attrs(class_get(cls)); class_put(cls); + if (error) + goto out_unregister; +out: return error; +out_unregister: + kset_unregister(&cp->class_subsys); +out_free_cp: + kfree(cp); + goto out; } EXPORT_SYMBOL_GPL(__class_register); Index: linux-mm/drivers/base/core.c =================================================================== --- linux-mm.orig/drivers/base/core.c +++ linux-mm/drivers/base/core.c @@ -618,6 +618,10 @@ static struct kobject *get_device_parent kobject_put(k); return NULL; } + /* If we created a new class-directory setup tagging */ + if (dev->class->tag_ops) + sysfs_enable_tagging(k, dev->class->tag_ops); + /* do not emit an uevent for this simple "glue" directory */ return k; } @@ -754,13 +758,14 @@ static void device_remove_class_symlinks if (dev->kobj.parent != &dev->class->p->class_subsys.kobj && device_is_not_partition(dev)) - sysfs_remove_link(&dev->class->p->class_subsys.kobj, + sysfs_delete_link(&dev->class->p->class_subsys.kobj, &dev->kobj, dev_name(dev)); #else if (dev->parent && device_is_not_partition(dev)) sysfs_remove_link(&dev->kobj, "device"); - sysfs_remove_link(&dev->class->p->class_subsys.kobj, dev_name(dev)); + sysfs_delete_link(&dev->class->p->class_subsys.kobj, &dev->kobj, + dev_name(dev)); #endif sysfs_remove_link(&dev->kobj, "subsystem"); @@ -1349,6 +1354,16 @@ int device_rename(struct device *dev, ch strlcpy(old_device_name, dev_name(dev), BUS_ID_SIZE); strlcpy(dev->bus_id, new_name, BUS_ID_SIZE); +#ifndef CONFIG_SYSFS_DEPRECATED + if (dev->class && + (dev->kobj.parent != &dev->class->p->class_subsys.kobj)) { + error = sysfs_rename_link(&dev->class->p->class_subsys.kobj, + &dev->kobj, old_device_name, new_name); + if (error) + goto out; + } +#endif + error = kobject_rename(&dev->kobj, new_name); if (error) { strlcpy(dev->bus_id, old_device_name, BUS_ID_SIZE); @@ -1357,23 +1372,13 @@ int device_rename(struct device *dev, ch #ifdef CONFIG_SYSFS_DEPRECATED if (old_class_name) { + error = -ENOMEM; new_class_name = make_class_name(dev->class->name, &dev->kobj); - if (new_class_name) { - error = sysfs_create_link(&dev->parent->kobj, - &dev->kobj, new_class_name); - if (error) - goto out; - sysfs_remove_link(&dev->parent->kobj, old_class_name); - } - } -#else - if (dev->class) { - error = sysfs_create_link(&dev->class->p->class_subsys.kobj, - &dev->kobj, dev_name(dev)); - if (error) - goto out; - sysfs_remove_link(&dev->class->p->class_subsys.kobj, - old_device_name); + if (new_class_name) + error = sysfs_rename_link(&dev->parent->kobj, + &dev->kobj, + old_class_name, + new_class_name); } #endif Index: linux-mm/include/linux/device.h =================================================================== --- linux-mm.orig/include/linux/device.h +++ linux-mm/include/linux/device.h @@ -195,6 +195,8 @@ struct class { int (*suspend)(struct device *dev, pm_message_t state); int (*resume)(struct device *dev); + const struct sysfs_tagged_dir_operations *tag_ops; + struct pm_ops *pm; struct class_private *p; }; --
| |