From nobody Fri Dec 19 13:31:37 2025 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 8E52131A808; Mon, 8 Dec 2025 06:30:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765175418; cv=none; b=YXczHs09oC+bglNRCGBJigbybdsEOU68/4JWFISgKxsVvvSdxaNvS/RIj/ftp7v+btUTfo/SMLacxpv0jASoLdVJ0fwONFtZfdH4T1ZNVXBO8TbLXdso4q1F1job/WOe/nN5h0vHOD6e+DyR4yOHNANFG4PYH9NhyYMqNsZy5VI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765175418; c=relaxed/simple; bh=R9m1eSl/V//tH4nv+68KXrctOAqXsKHuChO2fV0643Q=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=XElzzI6kah4QJkypF0f+UtlT48iIBUKok7v8owBWA5n2OJAOoKZQsmvrcAXFFxaBbt851CeyM2kmVjfNt7yK4Lf4C4VmmjiGCxjgAqZuolbnYuut+Uh1qaIv9k4WOzWiv67LTLFB4uVEByeMb4DjTm321/o/UxZpwN1UdUy2L64= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=KBamaiLI; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="KBamaiLI" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CB7B3C4CEF1; Mon, 8 Dec 2025 06:30:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1765175417; bh=R9m1eSl/V//tH4nv+68KXrctOAqXsKHuChO2fV0643Q=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=KBamaiLINXILpgvGkgCQPbnTIHWtwp2rObqcA/i3cCRUkLuYOUTyDUBNU0lqHPqWJ gVbtbaaGI3dPObeMnBCW58NnnqLc707Oiqa7T8R3biwJ9nF94DTs0P6XVf6hOPpLQF l1+UpWH3GBSnC0/rp1YEGAABhen7ltyKK3nHuk42tlZDfVzhbzsIWfG1pTwjDTW3pK gmRChhrcxN7V406wIiciL5N7BlFleI+z6LkmuU00RUgoAr8vXhBFf6XLE0I6VadldR X+di5Q5FhDiFvn5zl+dLDLPKZDnzLSJRp0shJ6RhRJ02fowl7VGccZra1NDAEqaNg9 DCh5eL0wV/IPQ== From: SeongJae Park To: Cc: SeongJae Park , Andrew Morton , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH v3 19/37] mm/damon/sysfs: implement sample/filters/ directory Date: Sun, 7 Dec 2025 22:29:23 -0800 Message-ID: <20251208062943.68824-20-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20251208062943.68824-1-sj@kernel.org> References: <20251208062943.68824-1-sj@kernel.org> 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 Content-Type: text/plain; charset="utf-8" Add a directory for letting DAMON ABI users install and uninstall DAMON sample filters. Signed-off-by: SeongJae Park --- mm/damon/sysfs.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) diff --git a/mm/damon/sysfs.c b/mm/damon/sysfs.c index 16d58cde03e8..4208fed2b8df 100644 --- a/mm/damon/sysfs.c +++ b/mm/damon/sysfs.c @@ -749,6 +749,36 @@ static const struct kobj_type damon_sysfs_intervals_kt= ype =3D { .default_groups =3D damon_sysfs_intervals_groups, }; =20 +/* + * access check report filters directory + */ + +struct damon_sysfs_sample_filters { + struct kobject kobj; +}; + +static struct damon_sysfs_sample_filters * +damon_sysfs_sample_filters_alloc(void) +{ + return kzalloc(sizeof(struct damon_sysfs_sample_filters), GFP_KERNEL); +} + +static void damon_sysfs_sample_filters_release(struct kobject *kobj) +{ + kfree(container_of(kobj, struct damon_sysfs_sample_filters, kobj)); +} + +static struct attribute *damon_sysfs_sample_filters_attrs[] =3D { + NULL, +}; +ATTRIBUTE_GROUPS(damon_sysfs_sample_filters); + +static const struct kobj_type damon_sysfs_sample_filters_ktype =3D { + .release =3D damon_sysfs_sample_filters_release, + .sysfs_ops =3D &kobj_sysfs_ops, + .default_groups =3D damon_sysfs_sample_filters_groups, +}; + /* * access check primitives directory */ @@ -854,6 +884,7 @@ static const struct kobj_type damon_sysfs_primitives_kt= ype =3D { struct damon_sysfs_sample { struct kobject kobj; struct damon_sysfs_primitives *primitives; + struct damon_sysfs_sample_filters *filters; }; =20 static struct damon_sysfs_sample *damon_sysfs_sample_alloc(void) @@ -871,6 +902,7 @@ static int damon_sysfs_sample_add_dirs( struct damon_sysfs_sample *sample) { struct damon_sysfs_primitives *primitives; + struct damon_sysfs_sample_filters *filters; int err; =20 primitives =3D damon_sysfs_primitives_alloc(true, false); @@ -883,6 +915,19 @@ static int damon_sysfs_sample_add_dirs( goto put_primitives_out; sample->primitives =3D primitives; =20 + filters =3D damon_sysfs_sample_filters_alloc(); + if (!filters) + return -ENOMEM; + err =3D kobject_init_and_add(&filters->kobj, + &damon_sysfs_sample_filters_ktype, &sample->kobj, + "filters"); + if (err) + goto put_filters_out; + sample->filters =3D filters; + return 0; +put_filters_out: + kobject_put(&filters->kobj); + sample->filters =3D NULL; put_primitives_out: kobject_put(&primitives->kobj); sample->primitives =3D NULL; @@ -894,6 +939,9 @@ static void damon_sysfs_sample_rm_dirs( { if (sample->primitives) kobject_put(&sample->primitives->kobj); + if (sample->filters) { + kobject_put(&sample->filters->kobj); + } } =20 static void damon_sysfs_sample_release(struct kobject *kobj) --=20 2.47.3