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 61D5A343D86; Mon, 18 May 2026 23:41:28 +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=1779147688; cv=none; b=ggtYgb+QWVzrLNV2elNEXcwJ8nhanUMF9l85WMmRFZtS7PX+PB8qzWgTP7NwSFSFPxPvSR0wZzZ6hl5hp7O/aXQFwTgkyxxuQ7pCZZbpK2v8VhEYpGb8qtXRC2ZIm/jSAx+tEw+6cvqGM36JnkUR3xDpk8Nvj6gIa07C7QR096I= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779147688; c=relaxed/simple; bh=iQV6uszTSASR7SPrN3OuATode4ysgHHPU+n3qGy6r2A=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=IjwxpQuE/DivF4UdHdQDK/0FXmVlA0DBvi8y96O6q1btpnRIYQl2SctmRXdj07SQyj6/QR4SynPC23X+j3QZl5PZ9BlE86cxB4dwDNBxbMz2sYY0A7oUqj+eH9p8p5a5I/+Kaaz09w7Elm10R0LIXoYzS/h+IxkJg5ydk3dE5gE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=hRdfq4b2; 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="hRdfq4b2" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1D4ABC2BCB7; Mon, 18 May 2026 23:41:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1779147688; bh=iQV6uszTSASR7SPrN3OuATode4ysgHHPU+n3qGy6r2A=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=hRdfq4b2Z4RMt54O4rh/DHjSSfMRDWBJgbO2JPOqIO3JnLYnF59ElNO15mTckEh6/ rmdJs0hrf77dZBSubA5knpRrY92Pw7+7gJ03Tf0hlRwjxl6trKumdwMIw18h3TQJ0P I7z/n2kdhEHP1DCWD89OSgwpgjjrwioFLLn1VxF7ALLa0WLlv5H+H0aCLqNTzwya/2 ShQA9airxY5mc565VYqTITRVknU79aByJGmoZZsb/VVxo9ucDxwnjjkADN+dQY2L/i kDCMR1J+ATHvwqZGS0vTcT3A89Bknn61J5NgbIKDm8T0EZWVkgvpVqVLJxo+imDM7G aU4x+XAx2W5rw== From: SeongJae Park To: Andrew Morton Cc: SeongJae Park , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 13/28] mm/damon/sysfs: implement filter dir files Date: Mon, 18 May 2026 16:41:01 -0700 Message-ID: <20260518234119.97569-14-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260518234119.97569-1-sj@kernel.org> References: <20260518234119.97569-1-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 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 2dc475ea0f0f7..51a4f05c9275c 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