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 D460838D3F4; Tue, 28 Jul 2026 04:12:56 +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=1785211979; cv=none; b=f7ML7x5SGjj/Jp4anVBFiw3KbkmPjpExHVXx3kdyvuiEtaEweXnghLZ1ir3oAUEhs5G1dASbCN9CigenQBxvn2Fpa6QThsHL/xGV7cuckjHs5VYM/hNEOLniC11CgDWQrx+JBK+wjYzAPZq6lwA5qyNhj+3R46YDcuj4bH+jS1s= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785211979; c=relaxed/simple; bh=cEhqCkUFmoCCD/NZdQobrOcMALP0Al9OaK8bPfMwbPo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=GaxEX+69QhnDa8hgoXDNzdeMzjPcR9OpLpt26P++dIkVzeWAeiuUOZCxHsNjxlgtAB2EiI71JvQNyOC9qL1tRJ2Zb/+GbnubzHZDqZPygK48a6k9uRwwBYaoAFDQddGY5LfmKn7LupGVK47F2XQzYxm+OhbMLBVNiAf3zOYwQ/k= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=KVgUePz9; 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="KVgUePz9" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 073471F00ADB; Tue, 28 Jul 2026 04:12:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1785211975; bh=2yJj2ZFkc+yp+KChpPtjKxUM1furNtj+IkOWlffAhxQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=KVgUePz96y1L65EFHBLf3cfL0qHfwHwU5csEA6Pc4XEATVh5hbgDQS/+aGKXyqb/Q zdsG4p3QRL8L2pvGOL7KhRTrCJUFj3VvsYgjihI+jpymggk/UKzmTk9SXCqbWE2+OH bsJKpgocozn4wjVAF1prMWPLCYndi9V2nOh+lPk9XL9Fkhdsau+Q7fWsCNK7M8EMKK SNq4uNdtQtcsbuARTEmFkUzUoJiFilxAMvC391+47NccUmDGQ31yX0qWu6S+S6UJuJ R+HxABfoph5askdWN2r7e8suRCsj7svboTsyaL9tzE6hZsgKzWjZOJY0aZ5g31MFqA 1kqmTURfYaMNQ== 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 v2.2 09/17] mm/damon/sysfs: implement preps directory Date: Mon, 27 Jul 2026 21:12:30 -0700 Message-ID: <20260728041242.187380-10-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260728041242.187380-1-sj@kernel.org> References: <20260728041242.187380-1-sj@kernel.org> Precedence: bulk X-Mailing-List: damon@lists.linux.dev 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 50ff1c172d746..66a3e7de869a8 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