From patchwork Wed Nov 30 20:09:32 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: SeongJae Park X-Patchwork-Id: 27967 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:adf:f944:0:0:0:0:0 with SMTP id q4csp1127959wrr; Wed, 30 Nov 2022 12:10:42 -0800 (PST) X-Google-Smtp-Source: AA0mqf7t8wdhGKplWIe/UBWOLwTXIOSkILyPftruBTNWNF+aih+v7Py6VrlIIP3JKlst45dkNihA X-Received: by 2002:aa7:9057:0:b0:573:1d31:2b78 with SMTP id n23-20020aa79057000000b005731d312b78mr45167002pfo.61.1669839042014; Wed, 30 Nov 2022 12:10:42 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1669839042; cv=none; d=google.com; s=arc-20160816; b=NzHn7ZMiX5LwyVyr9SSydcFY8ObKX6d8x8IoCKLPzUcIXpSLBuYhcCEix1i7up2GCY CivdZX+ukf/qEL82lLwYLz8ka7cClGc5Ap8RqJ+N7r+9ZmiJ4FzM0VQTZJqyU5ZbIHBy qMYGq+Bb+OLTFhVe0cb2TeZFlDWNNpe8uTd3MrE6SDz6OUtFeACWFldmpLREcaGZOZfk VRTzfZdSxML74Jyw9OoQPuiOB9w06wr7DBdB6lW/GqXHRsT1G8GJEgbZ0CiucQc4E10n 2gWM7dEfjbgHYDfIWp8ht1RwJyjqRFxUarGCdZ4r+xzMkrelLCYPUx2t9D39aIN+fiYr Tk2A== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=6SIrU+qHgmD/alHJaDLXicupWPCEB92hw5xZgg3ikzQ=; b=MXSKSQapM03AzUaRxakTvSDBE3XoJP3dOUxupjjD5q/tkud/lmssfLin3Pesod0qqx X0ZoCi3D2+3Con7WBgaedm1mOck/p9fWBlkUgDXfqjWMZsr/V8v9Ynq0Y+xC0NRSSO4E jbVOgToJrSrZaet5zcYLXrZGq0ohtmFy4S9LyMvWJ6LsmqS5CpXEpZtSjcuoTJS39TQa 9muUxgjEmoY6xVZalrRXK4fIEEpnCq1MmrjoR3WwyI01lugCVdCxHpuA59oV270SREIv OWMnwigl5SuhUG00lOAOmwVXX8FCYmvXCGtO7s9fEmYrjbcruXQSi3fJ5WfXncK4+esw hm9A== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=NTQWpYMf; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id c18-20020a170902d49200b001898e06ac4esi2274365plg.553.2022.11.30.12.10.28; Wed, 30 Nov 2022 12:10:41 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=NTQWpYMf; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229834AbiK3UKC (ORCPT + 99 others); Wed, 30 Nov 2022 15:10:02 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43710 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229818AbiK3UJr (ORCPT ); Wed, 30 Nov 2022 15:09:47 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3175F900D1 for ; Wed, 30 Nov 2022 12:09:46 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id C5D7961D9A for ; Wed, 30 Nov 2022 20:09:45 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D069EC4347C; Wed, 30 Nov 2022 20:09:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1669838985; bh=KP45fkenUtVNkuekA5wpVSKSKg+M620wUBu7fatA2gQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=NTQWpYMfGiGnvkvcUD2hsgvAJoaLLAGpgORABV/99qrjSgvDSuLTsu8EWxEpxOkC8 Ra5tBL1hzv3XV1KCE8AOIShKvRHtuOtDrebbOYd+Pn29i9ABOsKtLVWpeDYUREwgQV Uh9STp9P2cC7/5m0d86YylFxX0JdbfnwNVyE+iQDB8QRo6E7JsJ6KulVXS3ZYFR1VI RuHc2GrW3qhJDPVbfW7QNkFu95kSKffTf+az7hHTAOAJf+6osimwHJ7FF15Te9OdbK QVDK8BWnZk0CagWCW3xh8lgPsiDMb1sm0nbT1EfNOu0ZWQOuoQ6j4lSsxAZ+0vzU+l 6nJiU15n2JW0w== From: SeongJae Park To: SeongJae Park , Andrew Morton Cc: damon@lists.linux.dev, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [RFC PATCH v2 06/11] mm/damon/sysfs-schemes: implement filter directory Date: Wed, 30 Nov 2022 20:09:32 +0000 Message-Id: <20221130200937.118005-7-sj@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221130200937.118005-1-sj@kernel.org> References: <20221130200937.118005-1-sj@kernel.org> MIME-Version: 1.0 X-Spam-Status: No, score=-7.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_HI, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1750953143320739970?= X-GMAIL-MSGID: =?utf-8?q?1750953143320739970?= Implement DAMOS filter directory which will be located under the filters directory. The directory provides three files, namely type, matching, and memcg_path. 'type' and 'matching' will be directly connected to the fields of 'struct damos_filter' having same name. 'memcg_path' will receive the path of the memory cgroup of the interest and later converted to memcg id when it's committed. Signed-off-by: SeongJae Park --- mm/damon/sysfs-schemes.c | 128 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 128 insertions(+) diff --git a/mm/damon/sysfs-schemes.c b/mm/damon/sysfs-schemes.c index 50c8148cb474..afbfc55a8e84 100644 --- a/mm/damon/sysfs-schemes.c +++ b/mm/damon/sysfs-schemes.c @@ -258,6 +258,134 @@ static struct kobj_type damon_sysfs_stats_ktype = { .default_groups = damon_sysfs_stats_groups, }; +/* + * filter directory + */ + +struct damon_sysfs_scheme_filter { + struct kobject kobj; + enum damos_filter_type type; + bool matching; + char *memcg_path; +}; + +/* Should match with enum damos_filter_type */ +static const char * const damon_sysfs_scheme_filter_type_strs[] = { + "anon", + "memcg", +}; + +static ssize_t type_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + struct damon_sysfs_scheme_filter *filter = container_of(kobj, + struct damon_sysfs_scheme_filter, kobj); + + return sysfs_emit(buf, "%s\n", + damon_sysfs_scheme_filter_type_strs[filter->type]); +} + +static ssize_t type_store(struct kobject *kobj, + struct kobj_attribute *attr, const char *buf, size_t count) +{ + struct damon_sysfs_scheme_filter *filter = container_of(kobj, + struct damon_sysfs_scheme_filter, kobj); + enum damos_filter_type type; + ssize_t ret = -EINVAL; + + for (type = 0; type < NR_DAMOS_FILTER_TYPES; type++) { + if (sysfs_streq(buf, damon_sysfs_scheme_filter_type_strs[ + type])) { + filter->type = type; + ret = count; + break; + } + } + return ret; +} + +static ssize_t matching_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + struct damon_sysfs_scheme_filter *filter = container_of(kobj, + struct damon_sysfs_scheme_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_scheme_filter *filter = container_of(kobj, + struct damon_sysfs_scheme_filter, kobj); + bool matching; + int err = kstrtobool(buf, &matching); + + if (err) + return err; + + filter->matching = matching; + return count; +} + +static ssize_t memcg_path_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + struct damon_sysfs_scheme_filter *filter = container_of(kobj, + struct damon_sysfs_scheme_filter, kobj); + + return sysfs_emit(buf, "%s\n", + filter->memcg_path ? filter->memcg_path : ""); +} + +static ssize_t memcg_path_store(struct kobject *kobj, + struct kobj_attribute *attr, const char *buf, size_t count) +{ + struct damon_sysfs_scheme_filter *filter = container_of(kobj, + struct damon_sysfs_scheme_filter, kobj); + char *path = kmalloc(sizeof(*path) * (count + 1), GFP_KERNEL); + + if (!path) + return -ENOMEM; + + strncpy(path, buf, count); + path[count] = '\0'; + filter->memcg_path = path; + return count; +} + +static void damon_sysfs_scheme_filter_release(struct kobject *kobj) +{ + struct damon_sysfs_scheme_filter *filter = container_of(kobj, + struct damon_sysfs_scheme_filter, kobj); + + kfree(filter->memcg_path); + kfree(filter); +} + +static struct kobj_attribute damon_sysfs_scheme_filter_type_attr = + __ATTR_RW_MODE(type, 0600); + +static struct kobj_attribute damon_sysfs_scheme_filter_matching_attr = + __ATTR_RW_MODE(matching, 0600); + +static struct kobj_attribute damon_sysfs_scheme_filter_memcg_path_attr = + __ATTR_RW_MODE(memcg_path, 0600); + +static struct attribute *damon_sysfs_scheme_filter_attrs[] = { + &damon_sysfs_scheme_filter_type_attr.attr, + &damon_sysfs_scheme_filter_matching_attr.attr, + &damon_sysfs_scheme_filter_memcg_path_attr.attr, + NULL, +}; +ATTRIBUTE_GROUPS(damon_sysfs_scheme_filter); + +static struct kobj_type damon_sysfs_scheme_filter_ktype = { + .release = damon_sysfs_scheme_filter_release, + .sysfs_ops = &kobj_sysfs_ops, + .default_groups = damon_sysfs_scheme_filter_groups, +}; + /* * filters directory */