From nobody Thu Nov 28 08:53:30 2024 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CBEA34779F for ; Thu, 3 Oct 2024 15:14:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727968501; cv=none; b=H2UROS8oSsF5RLfCwAkkn0VmTfm8Uas5rBnUJNXRuSPtMgerA/r5FfjUDBl7a+PpBzj1unPmLnRkpFEyPngAhEiFvOfC9uru3e4nxW6t7j4hOiVBua6VeWMAwQO9b2AqC6vVi4xSq/YZF5jynjaA37fzQ1UaClTZE3BAuHXgafI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727968501; c=relaxed/simple; bh=x7e6IA84Y6g/2IMVAFPlI1KZz8qVpAguY4Mb70GdZTU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ojpTT14B6Gwcb4aSuDcLXayeDcRtPYsjRO5mhJ9X1tawLkBNIUgcFoWTTE1SHzWHL4a1D248XPOE42ivIf5nxIAx437xCGvIfNCay/5m9JAEb+ZHs4rMrSp0DarPEQpOl+O5QnQfuaKHFR4BFyg8poFvt42BjgV1quhiFtDXDGM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=V72qORzn; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="V72qORzn" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1727968497; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=oQhx9++kG+k1aQeYKn4epgOWGCe4SvtQMhjT//HHnyw=; b=V72qORzn79ENZET25BJqQizrNygFWt96WC6pmkilq3yadkzW82VRvB6YquZN9qvXoI4pjc sUvAznZA/j7pFgmCJbuk3VSaD8QeoG9zmLCyzMxh/PG1gZHbHiC03bYAw69X6QJcauOMgL 2PfDCJV6U/ewmjDDPHWbWOHC7+cASbA= Received: from mx-prod-mc-04.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-63-z9YEDdHKMECjWaCiFVKw9Q-1; Thu, 03 Oct 2024 11:14:54 -0400 X-MC-Unique: z9YEDdHKMECjWaCiFVKw9Q-1 Received: from mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.17]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-04.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id AE83C19560BF; Thu, 3 Oct 2024 15:14:52 +0000 (UTC) Received: from fs-i40c-03.mgmt.fast.eng.rdu2.dc.redhat.com (fs-i40c-03.mgmt.fast.eng.rdu2.dc.redhat.com [10.6.24.150]) by mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 0D4D71955E8F; Thu, 3 Oct 2024 15:14:50 +0000 (UTC) From: Alexander Aring To: trondmy@kernel.org Cc: anna@kernel.org, bcodding@redhat.com, gregkh@linuxfoundation.org, rafael@kernel.org, akpm@linux-foundation.org, linux-nfs@vger.kernel.org, gfs2@lists.linux.dev, linux-kernel@vger.kernel.org Subject: [PATCH 1/4] kobject: add kset_type_create_and_add() helper Date: Thu, 3 Oct 2024 11:14:32 -0400 Message-ID: <20241003151435.3753959-2-aahringo@redhat.com> In-Reply-To: <20241003151435.3753959-1-aahringo@redhat.com> References: <20241003151435.3753959-1-aahringo@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.0 on 10.30.177.17 Content-Type: text/plain; charset="utf-8" Currently there exists the kset_create_and_add() helper that does not allow to have a different ktype for the created kset kobject. To allow a different ktype this patch will introduce the function kset_type_create_and_add() that allows to set a different ktype instead of using the global default kset_ktype variable. In my example I need to separate the created kobject inside the kset by net-namespaces. This patch allows me to do that by providing a user defined kobj_type structure that implements the necessary namespace functionality. Acked-by: Greg Kroah-Hartman Signed-off-by: Alexander Aring --- include/linux/kobject.h | 8 ++++-- lib/kobject.c | 59 ++++++++++++++++++++++++++++++----------- 2 files changed, 50 insertions(+), 17 deletions(-) diff --git a/include/linux/kobject.h b/include/linux/kobject.h index c8219505a79f..7504b7547ed2 100644 --- a/include/linux/kobject.h +++ b/include/linux/kobject.h @@ -175,8 +175,12 @@ struct kset { void kset_init(struct kset *kset); int __must_check kset_register(struct kset *kset); void kset_unregister(struct kset *kset); -struct kset * __must_check kset_create_and_add(const char *name, const str= uct kset_uevent_ops *u, - struct kobject *parent_kobj); +struct kset * __must_check +kset_type_create_and_add(const char *name, const struct kset_uevent_ops *u, + struct kobject *parent_kobj, const struct kobj_type *ktype); +struct kset * __must_check +kset_create_and_add(const char *name, const struct kset_uevent_ops *u, + struct kobject *parent_kobj); =20 static inline struct kset *to_kset(struct kobject *kobj) { diff --git a/lib/kobject.c b/lib/kobject.c index 72fa20f405f1..09dd3d4c7f56 100644 --- a/lib/kobject.c +++ b/lib/kobject.c @@ -946,6 +946,7 @@ static const struct kobj_type kset_ktype =3D { * @name: the name for the kset * @uevent_ops: a struct kset_uevent_ops for the kset * @parent_kobj: the parent kobject of this kset, if any. + * @ktype: a struct kobj_type for the kset * * This function creates a kset structure dynamically. This structure can * then be registered with the system and show up in sysfs with a call to @@ -957,7 +958,8 @@ static const struct kobj_type kset_ktype =3D { */ static struct kset *kset_create(const char *name, const struct kset_uevent_ops *uevent_ops, - struct kobject *parent_kobj) + struct kobject *parent_kobj, + const struct kobj_type *ktype) { struct kset *kset; int retval; @@ -973,39 +975,38 @@ static struct kset *kset_create(const char *name, kset->uevent_ops =3D uevent_ops; kset->kobj.parent =3D parent_kobj; =20 - /* - * The kobject of this kset will have a type of kset_ktype and belong to - * no kset itself. That way we can properly free it when it is - * finished being used. - */ - kset->kobj.ktype =3D &kset_ktype; + kset->kobj.ktype =3D ktype; kset->kobj.kset =3D NULL; =20 return kset; } =20 /** - * kset_create_and_add() - Create a struct kset dynamically and add it to = sysfs. + * kset_type_create_and_add() - Create a struct kset with kobj_type dynami= cally + * and add it to sysfs. * * @name: the name for the kset * @uevent_ops: a struct kset_uevent_ops for the kset * @parent_kobj: the parent kobject of this kset, if any. + * @ktype: a struct kobj_type for the kset * - * This function creates a kset structure dynamically and registers it - * with sysfs. When you are finished with this structure, call + * This function creates a kset structure with ktype structure dynamically= and + * registers it with sysfs. When you are finished with this structure, ca= ll * kset_unregister() and the structure will be dynamically freed when it - * is no longer being used. + * is no longer being used. Works like kset_create_and_add() just with the + * possibility to assign kobj_type to the kset. * * If the kset was not able to be created, NULL will be returned. */ -struct kset *kset_create_and_add(const char *name, - const struct kset_uevent_ops *uevent_ops, - struct kobject *parent_kobj) +struct kset *kset_type_create_and_add(const char *name, + const struct kset_uevent_ops *uevent_ops, + struct kobject *parent_kobj, + const struct kobj_type *ktype) { struct kset *kset; int error; =20 - kset =3D kset_create(name, uevent_ops, parent_kobj); + kset =3D kset_create(name, uevent_ops, parent_kobj, ktype); if (!kset) return NULL; error =3D kset_register(kset); @@ -1015,6 +1016,34 @@ struct kset *kset_create_and_add(const char *name, } return kset; } +EXPORT_SYMBOL_GPL(kset_type_create_and_add); + +/** + * kset_create_and_add() - Create a struct kset dynamically and add it to = sysfs. + * + * @name: the name for the kset + * @uevent_ops: a struct kset_uevent_ops for the kset + * @parent_kobj: the parent kobject of this kset, if any. + * + * This function creates a kset structure dynamically and registers it + * with sysfs. When you are finished with this structure, call + * kset_unregister() and the structure will be dynamically freed when it + * is no longer being used. + * + * If the kset was not able to be created, NULL will be returned. + */ +struct kset *kset_create_and_add(const char *name, + const struct kset_uevent_ops *uevent_ops, + struct kobject *parent_kobj) +{ + /* + * The kobject of this kset will have a type of kset_ktype and belong to + * no kset itself. That way we can properly free it when it is + * finished being used. + */ + return kset_type_create_and_add(name, uevent_ops, parent_kobj, + &kset_ktype); +} EXPORT_SYMBOL_GPL(kset_create_and_add); =20 =20 --=20 2.43.0