#include <linux/types.h>
#include <linux/list.h>
#include <linux/sysfs.h>
+#include <linux/compiler.h>
#include <linux/spinlock.h>
-#include <linux/rwsem.h>
#include <linux/kref.h>
-#include <linux/kobject_uevent.h>
#include <linux/kernel.h>
+#include <linux/wait.h>
#include <asm/atomic.h>
-#define KOBJ_NAME_LEN 20
+#define KOBJ_NAME_LEN 20
+#define UEVENT_HELPER_PATH_LEN 256
+#define UEVENT_NUM_ENVP 32 /* number of env pointers */
+#define UEVENT_BUFFER_SIZE 2048 /* buffer for the variables */
-/* counter to tag the hotplug event, read only except for the kobject core */
-extern u64 hotplug_seqnum;
+/* path to the userspace helper executed on an event */
+extern char uevent_helper[];
+
+/* counter to tag the uevent, read only except for the kobject core */
+extern u64 uevent_seqnum;
+
+/*
+ * The actions here must match the index to the string array
+ * in lib/kobject_uevent.c
+ *
+ * Do not add new actions here without checking with the driver-core
+ * maintainers. Action strings are not meant to express subsystem
+ * or device specific properties. In most cases you want to send a
+ * kobject_uevent_env(kobj, KOBJ_CHANGE, env) with additional event
+ * specific variables added to the event environment.
+ */
+enum kobject_action {
+ KOBJ_ADD,
+ KOBJ_REMOVE,
+ KOBJ_CHANGE,
+ KOBJ_MOVE,
+ KOBJ_ONLINE,
+ KOBJ_OFFLINE,
+ KOBJ_MAX
+};
struct kobject {
const char * k_name;
- char name[KOBJ_NAME_LEN];
struct kref kref;
struct list_head entry;
struct kobject * parent;
struct kset * kset;
struct kobj_type * ktype;
- struct dentry * dentry;
+ struct sysfs_dirent * sd;
+ wait_queue_head_t poll;
};
extern int kobject_set_name(struct kobject *, const char *, ...)
extern void kobject_init(struct kobject *);
extern void kobject_cleanup(struct kobject *);
-extern int kobject_add(struct kobject *);
+extern int __must_check kobject_add(struct kobject *);
extern void kobject_del(struct kobject *);
-extern int kobject_rename(struct kobject *, const char *new_name);
+extern int __must_check kobject_rename(struct kobject *, const char *new_name);
+extern int __must_check kobject_move(struct kobject *, struct kobject *);
-extern int kobject_register(struct kobject *);
+extern int __must_check kobject_register(struct kobject *);
extern void kobject_unregister(struct kobject *);
extern struct kobject * kobject_get(struct kobject *);
extern void kobject_put(struct kobject *);
+extern struct kobject *kobject_kset_add_dir(struct kset *kset,
+ struct kobject *, const char *);
+extern struct kobject *kobject_add_dir(struct kobject *, const char *);
+
extern char * kobject_get_path(struct kobject *, gfp_t);
struct kobj_type {
struct attribute ** default_attrs;
};
+struct kobj_uevent_env {
+ char *envp[UEVENT_NUM_ENVP];
+ int envp_idx;
+ char buf[UEVENT_BUFFER_SIZE];
+ int buflen;
+};
-/**
- * kset - a set of kobjects of a specific type, belonging
+struct kset_uevent_ops {
+ int (*filter)(struct kset *kset, struct kobject *kobj);
+ const char *(*name)(struct kset *kset, struct kobject *kobj);
+ int (*uevent)(struct kset *kset, struct kobject *kobj,
+ struct kobj_uevent_env *env);
+};
+
+/*
+ * struct kset - a set of kobjects of a specific type, belonging
* to a specific subsystem.
*
* All kobjects of a kset should be embedded in an identical
* of object; multiple ksets can belong to one subsystem. All
* ksets of a subsystem share the subsystem's lock.
*
- * Each kset can support hotplugging; if it does, it will be given
- * the opportunity to filter out specific kobjects from being
- * reported, as well as to add its own "data" elements to the
- * environment being passed to the hotplug helper.
+ * Each kset can support specific event variables; it can
+ * supress the event generation or add subsystem specific
+ * variables carried with the event.
*/
-struct kset_hotplug_ops {
- int (*filter)(struct kset *kset, struct kobject *kobj);
- const char *(*name)(struct kset *kset, struct kobject *kobj);
- int (*hotplug)(struct kset *kset, struct kobject *kobj, char **envp,
- int num_envp, char *buffer, int buffer_size);
-};
-
struct kset {
- struct subsystem * subsys;
struct kobj_type * ktype;
struct list_head list;
spinlock_t list_lock;
struct kobject kobj;
- struct kset_hotplug_ops * hotplug_ops;
+ struct kset_uevent_ops * uevent_ops;
};
extern void kset_init(struct kset * k);
-extern int kset_add(struct kset * k);
-extern int kset_register(struct kset * k);
+extern int __must_check kset_add(struct kset * k);
+extern int __must_check kset_register(struct kset * k);
extern void kset_unregister(struct kset * k);
static inline struct kset * to_kset(struct kobject * kobj)
extern struct kobject * kset_find_obj(struct kset *, const char *);
-/**
+/*
* Use this when initializing an embedded kset with no other
* fields to initialize.
*/
-#define set_kset_name(str) .kset = { .kobj = { .name = str } }
+#define set_kset_name(str) .kset = { .kobj = { .k_name = str } }
-
-struct subsystem {
- struct kset kset;
- struct rw_semaphore rwsem;
-};
-
-#define decl_subsys(_name,_type,_hotplug_ops) \
-struct subsystem _name##_subsys = { \
- .kset = { \
- .kobj = { .name = __stringify(_name) }, \
- .ktype = _type, \
- .hotplug_ops =_hotplug_ops, \
- } \
+#define decl_subsys(_name,_type,_uevent_ops) \
+struct kset _name##_subsys = { \
+ .kobj = { .k_name = __stringify(_name) }, \
+ .ktype = _type, \
+ .uevent_ops =_uevent_ops, \
}
-#define decl_subsys_name(_varname,_name,_type,_hotplug_ops) \
-struct subsystem _varname##_subsys = { \
- .kset = { \
- .kobj = { .name = __stringify(_name) }, \
- .ktype = _type, \
- .hotplug_ops =_hotplug_ops, \
- } \
+#define decl_subsys_name(_varname,_name,_type,_uevent_ops) \
+struct kset _varname##_subsys = { \
+ .kobj = { .k_name = __stringify(_name) }, \
+ .ktype = _type, \
+ .uevent_ops =_uevent_ops, \
}
/* The global /sys/kernel/ subsystem for people to chain off of */
-extern struct subsystem kernel_subsys;
+extern struct kset kernel_subsys;
+/* The global /sys/hypervisor/ subsystem */
+extern struct kset hypervisor_subsys;
-/**
+/*
* Helpers for setting the kset of registered objects.
* Often, a registered object belongs to a kset embedded in a
* subsystem. These do no magic, just make the resulting code
*/
#define kobj_set_kset_s(obj,subsys) \
- (obj)->kobj.kset = &(subsys).kset
+ (obj)->kobj.kset = &(subsys)
-/**
- * kset_set_kset_s(obj,subsys) - set kset for embedded kset.
- * @obj: ptr to some object type.
- * @subsys: a subsystem object (not a ptr).
- *
- * Can be used for any object type with an embedded ->kset.
- * Sets the kset of @obj's embedded kobject (via its embedded
- * kset) to @subsys.kset. This makes @obj a member of that
- * kset.
- */
-
-#define kset_set_kset_s(obj,subsys) \
- (obj)->kset.kobj.kset = &(subsys).kset
-
-/**
- * subsys_set_kset(obj,subsys) - set kset for subsystem
- * @obj: ptr to some object type.
- * @subsys: a subsystem object (not a ptr).
- *
- * Can be used for any object type with an embedded ->subsys.
- * Sets the kset of @obj's kobject to @subsys.kset. This makes
- * the object a member of that kset.
- */
-
-#define subsys_set_kset(obj,_subsys) \
- (obj)->subsys.kset.kobj.kset = &(_subsys).kset
-
-extern void subsystem_init(struct subsystem *);
-extern int subsystem_register(struct subsystem *);
-extern void subsystem_unregister(struct subsystem *);
-
-static inline struct subsystem * subsys_get(struct subsystem * s)
-{
- return s ? container_of(kset_get(&s->kset),struct subsystem,kset) : NULL;
-}
-
-static inline void subsys_put(struct subsystem * s)
-{
- kset_put(&s->kset);
-}
+extern void subsystem_init(struct kset *);
+extern int __must_check subsystem_register(struct kset *);
+extern void subsystem_unregister(struct kset *);
struct subsys_attribute {
struct attribute attr;
- ssize_t (*show)(struct subsystem *, char *);
- ssize_t (*store)(struct subsystem *, const char *, size_t);
+ ssize_t (*show)(struct kset *, char *);
+ ssize_t (*store)(struct kset *, const char *, size_t);
};
-extern int subsys_create_file(struct subsystem * , struct subsys_attribute *);
-extern void subsys_remove_file(struct subsystem * , struct subsys_attribute *);
+extern int __must_check subsys_create_file(struct kset *,
+ struct subsys_attribute *);
-#ifdef CONFIG_HOTPLUG
-void kobject_hotplug(struct kobject *kobj, enum kobject_action action);
-int add_hotplug_env_var(char **envp, int num_envp, int *cur_index,
- char *buffer, int buffer_size, int *cur_len,
- const char *format, ...)
- __attribute__((format (printf, 7, 8)));
+#if defined(CONFIG_HOTPLUG)
+int kobject_uevent(struct kobject *kobj, enum kobject_action action);
+int kobject_uevent_env(struct kobject *kobj, enum kobject_action action,
+ char *envp[]);
+
+int add_uevent_var(struct kobj_uevent_env *env, const char *format, ...)
+ __attribute__((format (printf, 2, 3)));
+
+int kobject_action_type(const char *buf, size_t count,
+ enum kobject_action *type);
#else
-static inline void kobject_hotplug(struct kobject *kobj, enum kobject_action action) { }
-static inline int add_hotplug_env_var(char **envp, int num_envp, int *cur_index,
- char *buffer, int buffer_size, int *cur_len,
- const char *format, ...)
+static inline int kobject_uevent(struct kobject *kobj, enum kobject_action action)
+{ return 0; }
+static inline int kobject_uevent_env(struct kobject *kobj,
+ enum kobject_action action,
+ char *envp[])
{ return 0; }
+
+static inline int add_uevent_var(struct kobj_uevent_env *env, const char *format, ...)
+{ return 0; }
+
+static inline int kobject_action_type(const char *buf, size_t count,
+ enum kobject_action *type)
+{ return -EINVAL; }
#endif
#endif /* __KERNEL__ */
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