From mboxrd@z Thu Jan 1 00:00:00 1970 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 B2BD33FF892; Thu, 14 May 2026 14:09:22 +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=1778767762; cv=none; b=YUfHYacs7H6z8vzMIGsR9G1Zp9COgbFe433RhGQfTqrou1uvqy9buVU3gNhOQgl/5B0HqLBGZNnjxpzT0Q9NjIcQ7nkiiTtUB7a6WRwGAB5+nBJBx+CDRXKIW/CKIuz+m0dtH6VIK4BC4RkGfg+vRSpUtvdwLBVWAc4prw15sPU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778767762; c=relaxed/simple; bh=xxAnM/x521/ipQQKxInfDno6KUEv3MR4zVVk+LBGBIk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=QIAI0QnyEiqU9Ef1nN9bM/j9LX6XTaCue2TjSRxsAGUC72iITXnMhIQ0Y6iNocWgTEQM7PsKHqyVJXemji/XL7Qsu/J1jGtpP2ssJ1dVpqTEt20oBS/WXzyXq7uOvHCGZ27BVU7vLFACwOL6jZAkmvSSZgUIJLfTt+3yOZnecOE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=PtrY6V/n; 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="PtrY6V/n" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 55B8BC2BCF6; Thu, 14 May 2026 14:09:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1778767762; bh=xxAnM/x521/ipQQKxInfDno6KUEv3MR4zVVk+LBGBIk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=PtrY6V/nk9nMrEMw11QgSISVE9eYaBsF2lYv5NkmWqcunA0Tif6ZrmbYPzwxoqwaF yXsn+QvTIiAbSNRjoeYtxUioZRa9jrtRiX65j9Tks7vLvEGU/eGY0hCYtZat2V1RB/ yGZ8/9w9Po5lIjDycFGA8OHNsfojy+uT9+n8+i2SBg189AIHBt+gK6EoeSt9xaSH8O iVzX9/pF+2SjoQ3zM/AntmvnijAnftp89NwbvT2zdlkiR8z0GRRApPKC6geldmTU85 IEU3PrQMlW9Bl9BEaNJVy+16sYzHqS/i5hv7WnxpFIkzWDC72cdiAqZSyhKMFXE635 p4voqvA6UjbgA== 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 v2.1 13/28] mm/damon/sysfs: implement filter dir files Date: Thu, 14 May 2026 07:08:46 -0700 Message-ID: <20260514140904.119781-14-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260514140904.119781-1-sj@kernel.org> References: <20260514140904.119781-1-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 sysfs files under the data probe filter directory for letting users to configure each filter. Signed-off-by: SeongJae Park --- mm/damon/sysfs.c | 114 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 114 insertions(+) diff --git a/mm/damon/sysfs.c b/mm/damon/sysfs.c index 25487a0268cbe..ed7bb734a236b 100644 --- a/mm/damon/sysfs.c +++ b/mm/damon/sysfs.c @@ -753,6 +753,9 @@ static const struct kobj_type damon_sysfs_intervals_ktype = { struct damon_sysfs_filter { struct kobject kobj; + enum damon_filter_type type; + bool matching; + bool allow; }; static struct damon_sysfs_filter *damon_sysfs_filter_alloc(void) @@ -760,6 +763,105 @@ static struct damon_sysfs_filter *damon_sysfs_filter_alloc(void) return kzalloc_obj(struct damon_sysfs_filter); } +struct damon_sysfs_filter_type_name { + enum damon_filter_type type; + char *name; +}; + +static const struct damon_sysfs_filter_type_name +damon_sysfs_filter_type_names[] = { + { + .type = DAMON_FILTER_TYPE_ANON, + .name = "anon", + }, +}; + +static ssize_t type_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + struct damon_sysfs_filter *filter = container_of(kobj, + struct damon_sysfs_filter, kobj); + int i; + + for (i = 0; i < ARRAY_SIZE(damon_sysfs_filter_type_names); i++) { + const struct damon_sysfs_filter_type_name *type_name; + + type_name = &damon_sysfs_filter_type_names[i]; + if (type_name->type == filter->type) + return sysfs_emit(buf, "%s\n", type_name->name); + } + return -EINVAL; +} + +static ssize_t type_store(struct kobject *kobj, + struct kobj_attribute *attr, const char *buf, size_t count) +{ + struct damon_sysfs_filter *filter = container_of(kobj, + struct damon_sysfs_filter, kobj); + ssize_t ret = -EINVAL; + int i; + + for (i = 0; i < ARRAY_SIZE(damon_sysfs_filter_type_names); i++) { + const struct damon_sysfs_filter_type_name *type_name; + + type_name = &damon_sysfs_filter_type_names[i]; + if (sysfs_streq(buf, type_name->name)) { + filter->type = type_name->type; + ret = count; + break; + } + } + return ret; +} + +static ssize_t matching_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + struct damon_sysfs_filter *filter = container_of(kobj, + struct damon_sysfs_filter, kobj); + + return sysfs_emit(buf, "%c\n", filter->matching ? 'Y' : 'N'); +} + +static ssize_t matching_store(struct kobject *kobj, + struct kobj_attribute *attr, const char *buf, size_t count) +{ + struct damon_sysfs_filter *filter = container_of(kobj, + struct damon_sysfs_filter, kobj); + bool matching; + int err = kstrtobool(buf, &matching); + + if (err) + return err; + + filter->matching = matching; + return count; +} + +static ssize_t allow_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + struct damon_sysfs_filter *filter = container_of(kobj, + struct damon_sysfs_filter, kobj); + + return sysfs_emit(buf, "%c\n", filter->allow ? 'Y' : 'N'); +} + +static ssize_t allow_store(struct kobject *kobj, + struct kobj_attribute *attr, const char *buf, size_t count) +{ + struct damon_sysfs_filter *filter = container_of(kobj, + struct damon_sysfs_filter, kobj); + bool allow; + int err = kstrtobool(buf, &allow); + + if (err) + return err; + + filter->allow = allow; + return count; +} + static void damon_sysfs_filter_release(struct kobject *kobj) { struct damon_sysfs_filter *filter = container_of(kobj, @@ -768,7 +870,19 @@ static void damon_sysfs_filter_release(struct kobject *kobj) kfree(filter); } +static struct kobj_attribute damon_sysfs_filter_type_attr = + __ATTR_RW_MODE(type, 0600); + +static struct kobj_attribute damon_sysfs_filter_matching_attr = + __ATTR_RW_MODE(matching, 0600); + +static struct kobj_attribute damon_sysfs_filter_allow_attr = + __ATTR_RW_MODE(allow, 0600); + static struct attribute *damon_sysfs_filter_attrs[] = { + &damon_sysfs_filter_type_attr.attr, + &damon_sysfs_filter_matching_attr.attr, + &damon_sysfs_filter_allow_attr.attr, NULL, }; ATTRIBUTE_GROUPS(damon_sysfs_filter); -- 2.47.3