X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=include%2Flinux%2Fkobject.h;h=c187c53cecd0f94dd15bf3340b87c9a3652ea6d3;hb=43bc926fffd92024b46cafaf7350d669ba9ca884;hp=765d660d3bea458977cc0e3110e4850210913d40;hpb=cee37fe97739d85991964371c1f3a745c00dd236;p=linux-2.6.git diff --git a/include/linux/kobject.h b/include/linux/kobject.h index 765d660d3..c187c53ce 100644 --- a/include/linux/kobject.h +++ b/include/linux/kobject.h @@ -23,17 +23,33 @@ #include #include #include -#include #include +#include #include -#define KOBJ_NAME_LEN 20 - -/* counter to tag the hotplug event, read only except for the kobject core */ -extern u64 hotplug_seqnum; +#define KOBJ_NAME_LEN 20 +#define UEVENT_HELPER_PATH_LEN 256 + +/* 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 proper string in lib/kobject_uevent.c */ +typedef int __bitwise kobject_action_t; +enum kobject_action { + KOBJ_ADD = (__force kobject_action_t) 0x01, /* exclusive to core */ + KOBJ_REMOVE = (__force kobject_action_t) 0x02, /* exclusive to core */ + KOBJ_CHANGE = (__force kobject_action_t) 0x03, /* device state change */ + KOBJ_MOUNT = (__force kobject_action_t) 0x04, /* mount event for block devices (broken) */ + KOBJ_UMOUNT = (__force kobject_action_t) 0x05, /* umount event for block devices (broken) */ + KOBJ_OFFLINE = (__force kobject_action_t) 0x06, /* device offline */ + KOBJ_ONLINE = (__force kobject_action_t) 0x07, /* device online */ +}; struct kobject { - char * k_name; + const char * k_name; char name[KOBJ_NAME_LEN]; struct kref kref; struct list_head entry; @@ -41,12 +57,13 @@ struct kobject { struct kset * kset; struct kobj_type * ktype; struct dentry * dentry; + wait_queue_head_t poll; }; extern int kobject_set_name(struct kobject *, const char *, ...) __attribute__((format(printf,2,3))); -static inline char * kobject_name(struct kobject * kobj) +static inline const char * kobject_name(const struct kobject * kobj) { return kobj->k_name; } @@ -57,7 +74,7 @@ extern void kobject_cleanup(struct kobject *); extern int kobject_add(struct kobject *); extern void kobject_del(struct kobject *); -extern int kobject_rename(struct kobject *, char *new_name); +extern int kobject_rename(struct kobject *, const char *new_name); extern int kobject_register(struct kobject *); extern void kobject_unregister(struct kobject *); @@ -65,7 +82,9 @@ extern void kobject_unregister(struct kobject *); extern struct kobject * kobject_get(struct kobject *); extern void kobject_put(struct kobject *); -extern char * kobject_get_path(struct kobject *, int); +extern struct kobject *kobject_add_dir(struct kobject *, const char *); + +extern char * kobject_get_path(struct kobject *, gfp_t); struct kobj_type { void (*release)(struct kobject *); @@ -87,15 +106,14 @@ struct kobj_type { * 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 { +struct kset_uevent_ops { int (*filter)(struct kset *kset, struct kobject *kobj); - char *(*name)(struct kset *kset, struct kobject *kobj); - int (*hotplug)(struct kset *kset, struct kobject *kobj, char **envp, + const char *(*name)(struct kset *kset, struct kobject *kobj); + int (*uevent)(struct kset *kset, struct kobject *kobj, char **envp, int num_envp, char *buffer, int buffer_size); }; @@ -105,7 +123,7 @@ struct kset { struct list_head list; spinlock_t list_lock; struct kobject kobj; - struct kset_hotplug_ops * hotplug_ops; + struct kset_uevent_ops * uevent_ops; }; @@ -153,20 +171,20 @@ struct subsystem { struct rw_semaphore rwsem; }; -#define decl_subsys(_name,_type,_hotplug_ops) \ +#define decl_subsys(_name,_type,_uevent_ops) \ struct subsystem _name##_subsys = { \ .kset = { \ .kobj = { .name = __stringify(_name) }, \ .ktype = _type, \ - .hotplug_ops =_hotplug_ops, \ + .uevent_ops =_uevent_ops, \ } \ } -#define decl_subsys_name(_varname,_name,_type,_hotplug_ops) \ +#define decl_subsys_name(_varname,_name,_type,_uevent_ops) \ struct subsystem _varname##_subsys = { \ .kset = { \ .kobj = { .name = __stringify(_name) }, \ .ktype = _type, \ - .hotplug_ops =_hotplug_ops, \ + .uevent_ops =_uevent_ops, \ } \ } @@ -239,17 +257,18 @@ struct subsys_attribute { }; extern int subsys_create_file(struct subsystem * , struct subsys_attribute *); -extern void subsys_remove_file(struct subsystem * , 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, +#if defined(CONFIG_HOTPLUG) +void kobject_uevent(struct kobject *kobj, enum kobject_action action); + +int add_uevent_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))); #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, +static inline void kobject_uevent(struct kobject *kobj, enum kobject_action action) { } + +static inline int add_uevent_var(char **envp, int num_envp, int *cur_index, char *buffer, int buffer_size, int *cur_len, const char *format, ...) { return 0; }