static int internal_create_group(struct kobject *kobj, int update, const struct attribute_group *grp) { struct kernfs_node *kn; int error; BUG_ON(!kobj || (!update && !kobj->sd)); /* Updates may happen before the object has been instantiated */ if (unlikely(update && !kobj->sd)) return -EINVAL; if (!grp->attrs && !grp->bin_attrs) { WARN(1, "sysfs: (bin_)attrs not set by subsystem for group: %s/%s\n", kobj->name, grp->name ? "" : grp->name); return -EINVAL; } if (grp->name) { kn = kernfs_create_dir(kobj->sd, grp->name, S_IRWXU | S_IRUGO | S_IXUGO, kobj); if (IS_ERR(kn)) { if (PTR_ERR(kn) == -EEXIST) sysfs_warn_dup(kobj->sd, grp->name); return PTR_ERR(kn); } } else kn = kobj->sd; kernfs_get(kn); error = create_files(kn, kobj, grp, update); if (error) { if (grp->name) kernfs_remove(kn); } kernfs_put(kn); return error; }
static int dslab_mkdir(struct kernfs_node *parent_kn, const char *name, umode_t mode) { struct kernfs_node *kn; int ret = 0; kn = kernfs_create_dir(parent_kn, name, mode, NULL); if (IS_ERR(kn)) { ret = PTR_ERR(kn); return ret; } kernfs_activate(kn); return ret; }