From patchwork Tue Sep 14 16:33:59 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Roberto Sassu X-Patchwork-Id: 12494247 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.9 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNWANTED_LANGUAGE_BODY, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 019CDC43217 for ; Tue, 14 Sep 2021 16:36:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EA8AA610A6 for ; Tue, 14 Sep 2021 16:36:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229675AbhINQiM (ORCPT ); Tue, 14 Sep 2021 12:38:12 -0400 Received: from frasgout.his.huawei.com ([185.176.79.56]:3805 "EHLO frasgout.his.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229464AbhINQiL (ORCPT ); Tue, 14 Sep 2021 12:38:11 -0400 Received: from fraeml714-chm.china.huawei.com (unknown [172.18.147.206]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4H8883086vz67vy0; Wed, 15 Sep 2021 00:34:43 +0800 (CST) Received: from roberto-ThinkStation-P620.huawei.com (10.204.63.22) by fraeml714-chm.china.huawei.com (10.206.15.33) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.8; Tue, 14 Sep 2021 18:36:51 +0200 From: Roberto Sassu To: , , CC: , , , , , Roberto Sassu , kernel test robot Subject: [PATCH v3 11/13] diglim: Interfaces - digests_count Date: Tue, 14 Sep 2021 18:33:59 +0200 Message-ID: <20210914163401.864635-12-roberto.sassu@huawei.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210914163401.864635-1-roberto.sassu@huawei.com> References: <20210914163401.864635-1-roberto.sassu@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.204.63.22] X-ClientProxiedBy: lhreml754-chm.china.huawei.com (10.201.108.204) To fraeml714-chm.china.huawei.com (10.206.15.33) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-integrity@vger.kernel.org Introduce the digests_count interface, which shows the current number of items stored in the hash table by type. Reported-by: kernel test robot (frame size warning) Signed-off-by: Roberto Sassu --- security/integrity/diglim/fs.c | 48 ++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) diff --git a/security/integrity/diglim/fs.c b/security/integrity/diglim/fs.c index e383254c72a4..467ff4f7c0ce 100644 --- a/security/integrity/diglim/fs.c +++ b/security/integrity/diglim/fs.c @@ -24,6 +24,7 @@ #include "diglim.h" #define MAX_DIGEST_LIST_SIZE (64 * 1024 * 1024 - 1) +#define TMPBUF_SIZE 512 static struct dentry *diglim_dir; /** @@ -37,6 +38,13 @@ static struct dentry *diglim_dir; * removed. */ static struct dentry *digest_lists_loaded_dir; +/** + * DOC: digests_count + * + * digests_count shows the current number of digests stored in the hash + * table by type. + */ +static struct dentry *digests_count; /** * DOC: digest_list_label * @@ -74,6 +82,39 @@ static struct dentry *digest_list_del_dentry; char digest_query[CRYPTO_MAX_ALG_NAME + 1 + IMA_MAX_DIGEST_SIZE * 2 + 1]; char digest_list_label[NAME_MAX + 1]; +static char *types_str[COMPACT__LAST] = { + [COMPACT_PARSER] = "Parser", + [COMPACT_FILE] = "File", + [COMPACT_METADATA] = "Metadata", + [COMPACT_DIGEST_LIST] = "Digest list", +}; + +static ssize_t diglim_show_htable_len(struct file *filp, char __user *buf, + size_t count, loff_t *ppos) +{ + char *tmpbuf; + ssize_t ret, len = 0; + int i; + + tmpbuf = kmalloc(TMPBUF_SIZE, GFP_KERNEL); + if (!tmpbuf) + return -ENOMEM; + + for (i = 0; i < COMPACT__LAST; i++) + len += scnprintf(tmpbuf + len, TMPBUF_SIZE - len, + "%s digests: %lu\n", types_str[i], + diglim_htable[i].len); + + ret = simple_read_from_buffer(buf, count, ppos, tmpbuf, len); + kfree(tmpbuf); + return ret; +} + +static const struct file_operations htable_len_ops = { + .read = diglim_show_htable_len, + .llseek = generic_file_llseek, +}; + static int parse_digest_list_filename(const char *digest_list_filename, u8 *digest, enum hash_algo *algo) { @@ -779,6 +820,12 @@ static int __init diglim_fs_init(void) if (IS_ERR(digest_lists_loaded_dir)) goto out; + digests_count = securityfs_create_file("digests_count", 0440, + diglim_dir, NULL, + &htable_len_ops); + if (IS_ERR(digests_count)) + goto out; + digest_list_add_dentry = securityfs_create_file("digest_list_add", 0200, diglim_dir, NULL, &digest_list_upload_ops); @@ -809,6 +856,7 @@ static int __init diglim_fs_init(void) securityfs_remove(digest_list_label_dentry); securityfs_remove(digest_list_del_dentry); securityfs_remove(digest_list_add_dentry); + securityfs_remove(digests_count); securityfs_remove(digest_lists_loaded_dir); securityfs_remove(diglim_dir); return -1;