From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 236363DA7FF; Mon, 27 Jul 2026 14:38:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785163117; cv=none; b=EeSYiPINDVrxfp2Rud68tlWmtIKU0WxRkuZDL+cb+x/Qi1Nd1PVrsOkR5ATjGdKanX7wGjIpLAKBHSw2V97nb5GH2VFWomTee/JBnUwW1eiymN79lUGXsQ8/yBRD69ZQHZi41dAWMXRMB5whz/3FWN0W7Yxsn9G1GsBfIGRQ6Hk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785163117; c=relaxed/simple; bh=OM41fkrAB0SpkfdTxx4uK/ru/AlDpi3O1ALkQHqnK/Q=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=aS6tqhtq3gZbmGsJEhYcydONi1Bb5NGoGGN1ht147H6GNKYnBvhDT3KXZunkbzB3FoKWD+M74Ptr6jSvNqvgFyE8GRPPckwSPr8J3VzQbPaPTpaUGurgn9n5VND9+Bvm8+ZPQXlwKOl9BC7WydTztIrzMA4wU767MyACeXrCw8c= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=IBV8y34e; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="IBV8y34e" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8902F1F00A3E; Mon, 27 Jul 2026 14:38:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1785163115; bh=13a3CodocCqwLWlDgXNYIFBHG2zYKkhYJH1FGDvZacQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=IBV8y34e1SDFTcYNSUGv2W/gy5aR2qxgPVmN0IiUlAfAidFrq+qr5oASeAHKZdfwb IaI8C2oqNJPuO5DBlCwYJUPwt4ejg5nNuisqu4eDyO+RSE3HdRGBicG614qV4m+bII 5IIbNFGozteg5zkljCJPPZoJnTLZk2HqhNtd1mzIF8oJXKHmHr4/myz5PaP2IUXT48 5ilfIDRj7/wuoqlCBaz3hIyqUPC0VzJ9VKsVVkC4sxqcQb5+jxGFJri15reNTRm31K ISa9r0aUT+1HngwrdYk5T8uCcrBnOcuWk83Gwp5JgLTA5b+Rbeu8KZzkPiaObMUP1z n+lHpN5btcWhQ== From: SJ Park To: Cc: SJ Park , Andrew Morton , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH v2.1 09/17] mm/damon/sysfs: implement preps directory Date: Mon, 27 Jul 2026 07:38:18 -0700 Message-ID: <20260727143829.86236-10-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260727143829.86236-1-sj@kernel.org> References: <20260727143829.86236-1-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: 8bit Implement a sysfs directory named 'preps' under the probe directory. It will be evolved to be used for specifying probe preps. Signed-off-by: SJ Park --- mm/damon/sysfs.c | 65 +++++++++++++++++++++++++++++++++++++++++++----- 1 file changed, 59 insertions(+), 6 deletions(-) diff --git a/mm/damon/sysfs.c b/mm/damon/sysfs.c index 376c6ecbd4bf3..e33070d2cbcc6 100644 --- a/mm/damon/sysfs.c +++ b/mm/damon/sysfs.c @@ -750,6 +750,35 @@ static const struct kobj_type damon_sysfs_intervals_ktype = { .default_groups = damon_sysfs_intervals_groups, }; +/* + * preps directory + */ + +struct damon_sysfs_preps { + struct kobject kobj; +}; + +static struct damon_sysfs_preps *damon_sysfs_preps_alloc(void) +{ + return kzalloc_obj(struct damon_sysfs_preps); +} + +static void damon_sysfs_preps_release(struct kobject *kobj) +{ + kfree(container_of(kobj, struct damon_sysfs_preps, kobj)); +} + +static struct attribute *damon_sysfs_preps_attrs[] = { + NULL, +}; +ATTRIBUTE_GROUPS(damon_sysfs_preps); + +static const struct kobj_type damon_sysfs_preps_ktype = { + .release = damon_sysfs_preps_release, + .sysfs_ops = &kobj_sysfs_ops, + .default_groups = damon_sysfs_preps_groups, +}; + /* * filter directory */ @@ -1070,6 +1099,7 @@ static const struct kobj_type damon_sysfs_filters_ktype = { struct damon_sysfs_probe { struct kobject kobj; unsigned int weight; + struct damon_sysfs_preps *preps; struct damon_sysfs_filters *filters; }; @@ -1080,25 +1110,48 @@ static struct damon_sysfs_probe *damon_sysfs_probe_alloc(void) static int damon_sysfs_probe_add_dirs(struct damon_sysfs_probe *probe) { + struct damon_sysfs_preps *preps; struct damon_sysfs_filters *filters; int err; - filters = damon_sysfs_filters_alloc(); - if (!filters) + preps = damon_sysfs_preps_alloc(); + if (!preps) return -ENOMEM; + probe->preps = preps; + + err = kobject_init_and_add(&preps->kobj, &damon_sysfs_preps_ktype, + &probe->kobj, "preps"); + if (err) + goto put_preps_out; + + filters = damon_sysfs_filters_alloc(); + if (!filters) { + err = -ENOMEM; + goto del_preps_out; + } probe->filters = filters; err = kobject_init_and_add(&filters->kobj, &damon_sysfs_filters_ktype, &probe->kobj, "filters"); - if (err) { - kobject_put(&filters->kobj); - probe->filters = NULL; - } + if (err) + goto put_filters_out; + return err; + +put_filters_out: + kobject_put(&filters->kobj); + probe->filters = NULL; +del_preps_out: + kobject_del(&preps->kobj); +put_preps_out: + kobject_put(&preps->kobj); + probe->preps = NULL; return err; } static void damon_sysfs_probe_rm_dirs(struct damon_sysfs_probe *probe) { + if (probe->preps) + kobject_put(&probe->preps->kobj); if (probe->filters) { damon_sysfs_filters_rm_dirs(probe->filters); kobject_put(&probe->filters->kobj); -- 2.47.3