sysfs文件系統(tǒng)中，普通文件對(duì)應(yīng)于kobject中的屬性。用sysfs_create_file()，參數(shù)如下：

sysfs_create_file(struct kobject * kobj, const struct attribute * attr) 

傳給它的參數(shù)是kobj和attr，其中，kobject對(duì)應(yīng)的是文件夾，attribute對(duì)應(yīng)的是該文件夾下的文件。

int sysfs_create_file(struct kobject * kobj, const struct attribute * attr)
{
                    BUG_ON(!kobj || !kobj->dentry || !attr);
                    return sysfs_add_file(kobj->dentry, attr, SYSFS_KOBJ_ATTR);
}
它直接調(diào)用sysfs_add_file()

int sysfs_add_file(struct dentry * dir, const struct attribute * attr, int type)
{
                    struct sysfs_dirent * parent_sd = dir->d_fsdata;
                    umode_t mode = (attr->mode & S_IALLUGO) | S_IFREG;
                    int error = 0;

                    down(&dir->d_inode->i_sem);
                    error = sysfs_make_dirent(parent_sd, NULL, (void *) attr, mode, type);
                    up(&dir->d_inode->i_sem); 
                    return error;
}

int sysfs_make_dirent(struct sysfs_dirent * parent_sd, struct dentry * dentry,
   void * element, umode_t mode, int type)
{
                  struct sysfs_dirent * sd;

                  sd = sysfs_new_dirent(parent_sd, element);
                  if (!sd)
                                    return -ENOMEM;

                  sd->s_mode = mode;
                  sd->s_type = type;
                  sd->s_dentry = dentry;
                  if (dentry) {
                                    dentry->d_fsdata = sysfs_get(sd);
                                    dentry->d_op = &sysfs_dentry_ops;
                  }

                  return 0;
}

sysfs_create_file ()僅僅是調(diào)用了sysfs_make_dirent()創(chuàng)建了一個(gè)sysfs_dirent結(jié)構(gòu)。與sysfs_create_dir()不同，它甚至沒有在sysfs文件系統(tǒng)下創(chuàng)建inode結(jié)構(gòu)。這項(xiàng)工作被滯后了，在sysfs_lookup()->sysfs_attach_attr()里面完成的。