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-rw-r--r--include/linux/sysfs.h61
1 files changed, 61 insertions, 0 deletions
diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h
index cfa83083a2d..f0496b3d181 100644
--- a/include/linux/sysfs.h
+++ b/include/linux/sysfs.h
@@ -15,6 +15,7 @@
#include <linux/compiler.h>
#include <linux/errno.h>
#include <linux/list.h>
+#include <linux/lockdep.h>
#include <asm/atomic.h>
struct kobject;
@@ -29,8 +30,33 @@ struct attribute {
const char *name;
struct module *owner;
mode_t mode;
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+ struct lock_class_key *key;
+ struct lock_class_key skey;
+#endif
};
+/**
+ * sysfs_attr_init - initialize a dynamically allocated sysfs attribute
+ * @attr: struct attribute to initialize
+ *
+ * Initialize a dynamically allocated struct attribute so we can
+ * make lockdep happy. This is a new requirement for attributes
+ * and initially this is only needed when lockdep is enabled.
+ * Lockdep gives a nice error when your attribute is added to
+ * sysfs if you don't have this.
+ */
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+#define sysfs_attr_init(attr) \
+do { \
+ static struct lock_class_key __key; \
+ \
+ (attr)->key = &__key; \
+} while(0)
+#else
+#define sysfs_attr_init(attr) do {} while(0)
+#endif
+
struct attribute_group {
const char *name;
mode_t (*is_visible)(struct kobject *,
@@ -74,6 +100,18 @@ struct bin_attribute {
struct vm_area_struct *vma);
};
+/**
+ * sysfs_bin_attr_init - initialize a dynamically allocated bin_attribute
+ * @attr: struct bin_attribute to initialize
+ *
+ * Initialize a dynamically allocated struct bin_attribute so we
+ * can make lockdep happy. This is a new requirement for
+ * attributes and initially this is only needed when lockdep is
+ * enabled. Lockdep gives a nice error when your attribute is
+ * added to sysfs if you don't have this.
+ */
+#define sysfs_bin_attr_init(bin_attr) sysfs_attr_init(&(bin_attr)->attr)
+
struct sysfs_ops {
ssize_t (*show)(struct kobject *, struct attribute *,char *);
ssize_t (*store)(struct kobject *,struct attribute *,const char *, size_t);
@@ -94,9 +132,12 @@ int __must_check sysfs_move_dir(struct kobject *kobj,
int __must_check sysfs_create_file(struct kobject *kobj,
const struct attribute *attr);
+int __must_check sysfs_create_files(struct kobject *kobj,
+ const struct attribute **attr);
int __must_check sysfs_chmod_file(struct kobject *kobj, struct attribute *attr,
mode_t mode);
void sysfs_remove_file(struct kobject *kobj, const struct attribute *attr);
+void sysfs_remove_files(struct kobject *kobj, const struct attribute **attr);
int __must_check sysfs_create_bin_file(struct kobject *kobj,
const struct bin_attribute *attr);
@@ -110,6 +151,9 @@ int __must_check sysfs_create_link_nowarn(struct kobject *kobj,
const char *name);
void sysfs_remove_link(struct kobject *kobj, const char *name);
+int sysfs_rename_link(struct kobject *kobj, struct kobject *target,
+ const char *old_name, const char *new_name);
+
int __must_check sysfs_create_group(struct kobject *kobj,
const struct attribute_group *grp);
int sysfs_update_group(struct kobject *kobj,
@@ -164,6 +208,12 @@ static inline int sysfs_create_file(struct kobject *kobj,
return 0;
}
+static inline int sysfs_create_files(struct kobject *kobj,
+ const struct attribute **attr)
+{
+ return 0;
+}
+
static inline int sysfs_chmod_file(struct kobject *kobj,
struct attribute *attr, mode_t mode)
{
@@ -175,6 +225,11 @@ static inline void sysfs_remove_file(struct kobject *kobj,
{
}
+static inline void sysfs_remove_files(struct kobject *kobj,
+ const struct attribute **attr)
+{
+}
+
static inline int sysfs_create_bin_file(struct kobject *kobj,
const struct bin_attribute *attr)
{
@@ -203,6 +258,12 @@ static inline void sysfs_remove_link(struct kobject *kobj, const char *name)
{
}
+static inline int sysfs_rename_link(struct kobject *k, struct kobject *t,
+ const char *old_name, const char *new_name)
+{
+ return 0;
+}
+
static inline int sysfs_create_group(struct kobject *kobj,
const struct attribute_group *grp)
{