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-rw-r--r--include/linux/sysfs.h124
1 files changed, 108 insertions, 16 deletions
diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h
index 9d68fed50f11..30b881555fa5 100644
--- a/include/linux/sysfs.h
+++ b/include/linux/sysfs.h
@@ -15,22 +15,44 @@
#include <linux/compiler.h>
#include <linux/errno.h>
#include <linux/list.h>
+#include <linux/lockdep.h>
+#include <linux/kobject_ns.h>
#include <asm/atomic.h>
struct kobject;
struct module;
+enum kobj_ns_type;
-/* FIXME
- * The *owner field is no longer used.
- * x86 tree has been cleaned up. The owner
- * attribute is still left for other arches.
- */
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 *,
@@ -60,20 +82,33 @@ struct attribute_group {
#define attr_name(_attr) (_attr).attr.name
+struct file;
struct vm_area_struct;
struct bin_attribute {
struct attribute attr;
size_t size;
void *private;
- ssize_t (*read)(struct kobject *, struct bin_attribute *,
+ ssize_t (*read)(struct file *, struct kobject *, struct bin_attribute *,
char *, loff_t, size_t);
- ssize_t (*write)(struct kobject *, struct bin_attribute *,
+ ssize_t (*write)(struct file *,struct kobject *, struct bin_attribute *,
char *, loff_t, size_t);
- int (*mmap)(struct kobject *, struct bin_attribute *attr,
+ int (*mmap)(struct file *, struct kobject *, struct bin_attribute *attr,
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);
@@ -94,13 +129,17 @@ 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_chmod_file(struct kobject *kobj, struct attribute *attr,
- mode_t mode);
+int __must_check sysfs_create_files(struct kobject *kobj,
+ const struct attribute **attr);
+int __must_check sysfs_chmod_file(struct kobject *kobj,
+ const 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,
- struct bin_attribute *attr);
-void sysfs_remove_bin_file(struct kobject *kobj, struct bin_attribute *attr);
+ const struct bin_attribute *attr);
+void sysfs_remove_bin_file(struct kobject *kobj,
+ const struct bin_attribute *attr);
int __must_check sysfs_create_link(struct kobject *kobj, struct kobject *target,
const char *name);
@@ -109,6 +148,12 @@ 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);
+
+void sysfs_delete_link(struct kobject *dir, struct kobject *targ,
+ const char *name);
+
int __must_check sysfs_create_group(struct kobject *kobj,
const struct attribute_group *grp);
int sysfs_update_group(struct kobject *kobj,
@@ -119,14 +164,23 @@ int sysfs_add_file_to_group(struct kobject *kobj,
const struct attribute *attr, const char *group);
void sysfs_remove_file_from_group(struct kobject *kobj,
const struct attribute *attr, const char *group);
+int sysfs_merge_group(struct kobject *kobj,
+ const struct attribute_group *grp);
+void sysfs_unmerge_group(struct kobject *kobj,
+ const struct attribute_group *grp);
void sysfs_notify(struct kobject *kobj, const char *dir, const char *attr);
void sysfs_notify_dirent(struct sysfs_dirent *sd);
struct sysfs_dirent *sysfs_get_dirent(struct sysfs_dirent *parent_sd,
+ const void *ns,
const unsigned char *name);
struct sysfs_dirent *sysfs_get(struct sysfs_dirent *sd);
void sysfs_put(struct sysfs_dirent *sd);
void sysfs_printk_last_file(void);
+
+/* Called to clear a ns tag when it is no longer valid */
+void sysfs_exit_ns(enum kobj_ns_type type, const void *tag);
+
int __must_check sysfs_init(void);
#else /* CONFIG_SYSFS */
@@ -163,8 +217,14 @@ 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)
+ const struct attribute *attr, mode_t mode)
{
return 0;
}
@@ -174,14 +234,19 @@ 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,
- struct bin_attribute *attr)
+ const struct bin_attribute *attr)
{
return 0;
}
static inline void sysfs_remove_bin_file(struct kobject *kobj,
- struct bin_attribute *attr)
+ const struct bin_attribute *attr)
{
}
@@ -202,6 +267,17 @@ 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 void sysfs_delete_link(struct kobject *k, struct kobject *t,
+ const char *name)
+{
+}
+
static inline int sysfs_create_group(struct kobject *kobj,
const struct attribute_group *grp)
{
@@ -230,6 +306,17 @@ static inline void sysfs_remove_file_from_group(struct kobject *kobj,
{
}
+static inline int sysfs_merge_group(struct kobject *kobj,
+ const struct attribute_group *grp)
+{
+ return 0;
+}
+
+static inline void sysfs_unmerge_group(struct kobject *kobj,
+ const struct attribute_group *grp)
+{
+}
+
static inline void sysfs_notify(struct kobject *kobj, const char *dir,
const char *attr)
{
@@ -239,6 +326,7 @@ static inline void sysfs_notify_dirent(struct sysfs_dirent *sd)
}
static inline
struct sysfs_dirent *sysfs_get_dirent(struct sysfs_dirent *parent_sd,
+ const void *ns,
const unsigned char *name)
{
return NULL;
@@ -251,6 +339,10 @@ static inline void sysfs_put(struct sysfs_dirent *sd)
{
}
+static inline void sysfs_exit_ns(int type, const void *tag)
+{
+}
+
static inline int __must_check sysfs_init(void)
{
return 0;
generated by cgit v1.2.3 (git 2.39.1) at 2025-04-26 03:45:31 +0000