1 files changed, 95 insertions, 0 deletions

diff --git a/fs/sysfs/sysfs.h b/fs/sysfs/sysfs.h
new file mode 100644
index 000000000000..a8a24a0c0b3b
--- /dev/null
+++ b/fs/sysfs/sysfs.h
@@ -0,0 +1,95 @@
+
+extern struct vfsmount * sysfs_mount;
+extern kmem_cache_t *sysfs_dir_cachep;
+
+extern struct inode * sysfs_new_inode(mode_t mode);
+extern int sysfs_create(struct dentry *, int mode, int (*init)(struct inode *));
+
+extern int sysfs_make_dirent(struct sysfs_dirent *, struct dentry *, void *,
+                                umode_t, int);
+extern struct dentry * sysfs_get_dentry(struct dentry *, const char *);
+
+extern int sysfs_add_file(struct dentry *, const struct attribute *, int);
+extern void sysfs_hash_and_remove(struct dentry * dir, const char * name);
+
+extern int sysfs_create_subdir(struct kobject *, const char *, struct dentry **);
+extern void sysfs_remove_subdir(struct dentry *);
+
+extern const unsigned char * sysfs_get_name(struct sysfs_dirent *sd);
+extern void sysfs_drop_dentry(struct sysfs_dirent *sd, struct dentry *parent);
+
+extern struct rw_semaphore sysfs_rename_sem;
+extern struct super_block * sysfs_sb;
+extern struct file_operations sysfs_dir_operations;
+extern struct file_operations sysfs_file_operations;
+extern struct file_operations bin_fops;
+extern struct inode_operations sysfs_dir_inode_operations;
+extern struct inode_operations sysfs_symlink_inode_operations;
+
+struct sysfs_symlink {
+        char * link_name;
+        struct kobject * target_kobj;
+};
+
+static inline struct kobject * to_kobj(struct dentry * dentry)
+{
+        struct sysfs_dirent * sd = dentry->d_fsdata;
+        return ((struct kobject *) sd->s_element);
+}
+
+static inline struct attribute * to_attr(struct dentry * dentry)
+{
+        struct sysfs_dirent * sd = dentry->d_fsdata;
+        return ((struct attribute *) sd->s_element);
+}
+
+static inline struct bin_attribute * to_bin_attr(struct dentry * dentry)
+{
+        struct sysfs_dirent * sd = dentry->d_fsdata;
+        return ((struct bin_attribute *) sd->s_element);
+}
+
+static inline struct kobject *sysfs_get_kobject(struct dentry *dentry)
+{
+        struct kobject * kobj = NULL;
+
+        spin_lock(&dcache_lock);
+        if (!d_unhashed(dentry)) {
+                struct sysfs_dirent * sd = dentry->d_fsdata;
+                if (sd->s_type & SYSFS_KOBJ_LINK) {
+                        struct sysfs_symlink * sl = sd->s_element;
+                        kobj = kobject_get(sl->target_kobj);
+                } else
+                        kobj = kobject_get(sd->s_element);
+        }
+        spin_unlock(&dcache_lock);
+
+        return kobj;
+}
+
+static inline void release_sysfs_dirent(struct sysfs_dirent * sd)
+{
+        if (sd->s_type & SYSFS_KOBJ_LINK) {
+                struct sysfs_symlink * sl = sd->s_element;
+                kfree(sl->link_name);
+                kobject_put(sl->target_kobj);
+                kfree(sl);
+        }
+        kmem_cache_free(sysfs_dir_cachep, sd);
+}
+
+static inline struct sysfs_dirent * sysfs_get(struct sysfs_dirent * sd)
+{
+        if (sd) {
+                WARN_ON(!atomic_read(&sd->s_count));
+                atomic_inc(&sd->s_count);
+        }
+        return sd;
+}
+
+static inline void sysfs_put(struct sysfs_dirent * sd)
+{
+        if (atomic_dec_and_test(&sd->s_count))
+                release_sysfs_dirent(sd);
+}
+