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 C18F6367F2E; Fri, 15 May 2026 00:44:52 +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=1778805892; cv=none; b=m+4I2WF40QoMjMGq9cU3zkw1uNwbg7DtBC4F6qkbfIjVRe1ExpKYGmOTepmXC9OYTIayrrvdKXiFgPFjs/aPKNWoL0VjUwmQCFEW1S/KamCmrWUa12Vt1RbVXdmfLqEpzxhhZOMZSH+1eDOjP9umIrwskZU3jNoXaJpxYs0FmkY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778805892; c=relaxed/simple; bh=x+zVZsyuCxQFI5S2rBudXwEq23hlEWV/J5n5iFgOKyY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Yy4K2WGGFSFbsFIUlkHISpDZZ3V2qV8g0zmwODwTW2SP9JP5VePEr5mrAe+v7+nNDaFYRG3FFxn7nB6qklx+R7JNYUIwdt6ABIZdkTdzPSYgPfRjFv/DUDn2v9QKRWVAp0kXt5A0OSSWx5BfmU/wOyVS0oAXoXAxVjVEk1gILPI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=cE0MkSsO; 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="cE0MkSsO" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9690EC2BCC6; Fri, 15 May 2026 00:44:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1778805891; bh=x+zVZsyuCxQFI5S2rBudXwEq23hlEWV/J5n5iFgOKyY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=cE0MkSsOf4Oay144eBv+qMcYAKnn6DW/g0GQje+aq768q7hFjacIpeI2QbYQiq43F Z8K0FG8tOBh1jjN678WfVdZhNBD/USZS43ckYkUVdE85qgVTJXrUxlDVccyKNYoE56 UVQPum4oXColJsUFxTmf/YmtGH2Tt+cRSm/51pufMXZJUfiQk8Z7BnIyRh+XDEXmre kMIORhJch/mvbrl5c4qqdQl68OkQUlKOOaRwggdMCOx+Euqzjaqyl+ShSomxL1BLAJ anpLVyNmE5QtPhpKMDdPM5tlGw6EJMUcY+KmZA3uhwI5poL2f4lbGtO2Vk0/0Kt9l6 8sPF2IIt1uFYA== 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 v2.2 13/28] mm/damon/sysfs: implement filter dir files Date: Thu, 14 May 2026 17:44:14 -0700 Message-ID: <20260515004433.128933-14-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260515004433.128933-1-sj@kernel.org> References: <20260515004433.128933-1-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 9f4ab28cf8734..dd520e39d3602 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