From patchwork Tue Jun 9 22:56:51 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Scott Branden X-Patchwork-Id: 11596725 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D84221392 for ; Tue, 9 Jun 2020 22:58:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B9E062076A for ; Tue, 9 Jun 2020 22:58:59 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=broadcom.com header.i=@broadcom.com header.b="NeIH+vrf" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728939AbgFIW6s (ORCPT ); Tue, 9 Jun 2020 18:58:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60766 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728918AbgFIW52 (ORCPT ); Tue, 9 Jun 2020 18:57:28 -0400 Received: from mail-pg1-x543.google.com (mail-pg1-x543.google.com [IPv6:2607:f8b0:4864:20::543]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BEA43C00862C for ; Tue, 9 Jun 2020 15:57:18 -0700 (PDT) Received: by mail-pg1-x543.google.com with SMTP id o6so89032pgh.2 for ; Tue, 09 Jun 2020 15:57:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=oEagKHQfVZx0qdrYMa0dmoo1zYusLN9mgZl9FtDlBHc=; b=NeIH+vrfN4cZXSsFgfJJBlW5vXLPso8ES5K1s09V6HLo9WoXGSLRcsF8Y6NsqFlxSN rrlpl9CcNAjDy2X7DPlehg6vK9F/PgB9fukbufYwwE/u6VMwcEjIcT5G4rTluYnqNaSi XZPkis/kHXF3v0rXYo2oMXKynczH3+7CqafGU= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=oEagKHQfVZx0qdrYMa0dmoo1zYusLN9mgZl9FtDlBHc=; b=WihkpKkfEBufaMi1QLXSjq1D3hPnFf0dOidfmoK8HMhYV4lqrw8WSjImZquHP4uzuj 5DtKau42xf5w87Vj9C+X7S7Soh/j1brzDE3BGyoaoefXfRubVOOizTyo0jO6G6ZjUiMQ P+gfu7FKNgmBZqGd0tD04OyGf3tMrIzHsQNaoLZZmmf2aZZFnheKA6v6wKFCMFaiGh5s rXoYFKr33dIRJHEoiWWOD5MHeSRPExx4ud7RWoYKVLRqzWhFUZCiIKUvPiuPDaZCmSfY Os9rgQMdslLETjfxJgI+rT/lc+ThhEdmLxKRSx2VQl9JUywt0x2zo1pg1/JVuR3FDo/j Cl6A== X-Gm-Message-State: AOAM530/NI9Hwz7xK8NxX3Z7kHu0fx7qX8q1WRQFs2HXJXIKhbkG+1/6 DyEKWctNAhPI6rX3vsGuSHwSWA== X-Google-Smtp-Source: ABdhPJyFipcfqgEYG9bZZZAf3PmjyTcJZiZCNb7sc8hY6kL8TjcCie8ZpBQEEqX1Ole43jhLoNBs/g== X-Received: by 2002:a65:4489:: with SMTP id l9mr220170pgq.223.1591743437934; Tue, 09 Jun 2020 15:57:17 -0700 (PDT) Received: from lbrmn-lnxub113.broadcom.net ([192.19.228.250]) by smtp.gmail.com with ESMTPSA id p8sm9104978pgs.29.2020.06.09.15.57.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 09 Jun 2020 15:57:17 -0700 (PDT) From: Scott Branden To: Luis Chamberlain , Wolfram Sang , Greg Kroah-Hartman , David Brown , Alexander Viro , Shuah Khan , bjorn.andersson@linaro.org, Shuah Khan , Arnd Bergmann Cc: Mimi Zohar , "Rafael J . Wysocki" , linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-fsdevel@vger.kernel.org, BCM Kernel Feedback , Olof Johansson , Andrew Morton , Dan Carpenter , Colin Ian King , Kees Cook , Takashi Iwai , linux-kselftest@vger.kernel.org, Andy Gross , linux-integrity@vger.kernel.org, linux-security-module@vger.kernel.org, Scott Branden Subject: [PATCH v8 3/8] test_firmware: add partial read support for request_firmware_into_buf Date: Tue, 9 Jun 2020 15:56:51 -0700 Message-Id: <20200609225656.18663-4-scott.branden@broadcom.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200609225656.18663-1-scott.branden@broadcom.com> References: <20200609225656.18663-1-scott.branden@broadcom.com> Sender: owner-linux-security-module@vger.kernel.org Precedence: bulk List-ID: Add additional hooks to test_firmware to pass in support for partial file read using request_firmware_into_buf. buf_size: size of buffer to request firmware into partial: indicates that a partial file request is being made file_offset: to indicate offset into file to request Signed-off-by: Scott Branden --- lib/test_firmware.c | 154 ++++++++++++++++++++++++++++++++++++++++---- 1 file changed, 142 insertions(+), 12 deletions(-) diff --git a/lib/test_firmware.c b/lib/test_firmware.c index 9fee2b93a8d1..48d8a3d5bea9 100644 --- a/lib/test_firmware.c +++ b/lib/test_firmware.c @@ -50,6 +50,9 @@ struct test_batched_req { * @name: the name of the firmware file to look for * @into_buf: when the into_buf is used if this is true * request_firmware_into_buf() will be used instead. + * @buf_size: size of buf to allocate when into_buf is true + * @file_offset: file offset to request when calling request_firmware_into_buf + * @partial: partial read opt when calling request_firmware_into_buf * @sync_direct: when the sync trigger is used if this is true * request_firmware_direct() will be used instead. * @send_uevent: whether or not to send a uevent for async requests @@ -89,6 +92,9 @@ struct test_batched_req { struct test_config { char *name; bool into_buf; + size_t buf_size; + size_t file_offset; + bool partial; bool sync_direct; bool send_uevent; u8 num_requests; @@ -183,6 +189,9 @@ static int __test_firmware_config_init(void) test_fw_config->num_requests = TEST_FIRMWARE_NUM_REQS; test_fw_config->send_uevent = true; test_fw_config->into_buf = false; + test_fw_config->buf_size = TEST_FIRMWARE_BUF_SIZE; + test_fw_config->file_offset = 0; + test_fw_config->partial = false; test_fw_config->sync_direct = false; test_fw_config->req_firmware = request_firmware; test_fw_config->test_result = 0; @@ -236,28 +245,35 @@ static ssize_t config_show(struct device *dev, dev_name(dev)); if (test_fw_config->name) - len += scnprintf(buf+len, PAGE_SIZE - len, + len += scnprintf(buf + len, PAGE_SIZE - len, "name:\t%s\n", test_fw_config->name); else - len += scnprintf(buf+len, PAGE_SIZE - len, + len += scnprintf(buf + len, PAGE_SIZE - len, "name:\tEMTPY\n"); - len += scnprintf(buf+len, PAGE_SIZE - len, + len += scnprintf(buf + len, PAGE_SIZE - len, "num_requests:\t%u\n", test_fw_config->num_requests); - len += scnprintf(buf+len, PAGE_SIZE - len, + len += scnprintf(buf + len, PAGE_SIZE - len, "send_uevent:\t\t%s\n", test_fw_config->send_uevent ? "FW_ACTION_HOTPLUG" : "FW_ACTION_NOHOTPLUG"); - len += scnprintf(buf+len, PAGE_SIZE - len, + len += scnprintf(buf + len, PAGE_SIZE - len, "into_buf:\t\t%s\n", test_fw_config->into_buf ? "true" : "false"); - len += scnprintf(buf+len, PAGE_SIZE - len, + len += scnprintf(buf + len, PAGE_SIZE - len, + "buf_size:\t%zu\n", test_fw_config->buf_size); + len += scnprintf(buf + len, PAGE_SIZE - len, + "file_offset:\t%zu\n", test_fw_config->file_offset); + len += scnprintf(buf + len, PAGE_SIZE - len, + "partial:\t\t%s\n", + test_fw_config->partial ? "true" : "false"); + len += scnprintf(buf + len, PAGE_SIZE - len, "sync_direct:\t\t%s\n", test_fw_config->sync_direct ? "true" : "false"); - len += scnprintf(buf+len, PAGE_SIZE - len, + len += scnprintf(buf + len, PAGE_SIZE - len, "read_fw_idx:\t%u\n", test_fw_config->read_fw_idx); mutex_unlock(&test_fw_mutex); @@ -315,6 +331,30 @@ static ssize_t test_dev_config_show_bool(char *buf, bool val) return snprintf(buf, PAGE_SIZE, "%d\n", val); } +static int test_dev_config_update_size_t(const char *buf, + size_t size, + size_t *cfg) +{ + int ret; + long new; + + ret = kstrtol(buf, 10, &new); + if (ret) + return ret; + + mutex_lock(&test_fw_mutex); + *(size_t *)cfg = new; + mutex_unlock(&test_fw_mutex); + + /* Always return full write size even if we didn't consume all */ + return size; +} + +static ssize_t test_dev_config_show_size_t(char *buf, size_t val) +{ + return snprintf(buf, PAGE_SIZE, "%zu\n", val); +} + static ssize_t test_dev_config_show_int(char *buf, int val) { return snprintf(buf, PAGE_SIZE, "%d\n", val); @@ -400,6 +440,83 @@ static ssize_t config_into_buf_show(struct device *dev, } static DEVICE_ATTR_RW(config_into_buf); +static ssize_t config_buf_size_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + int rc; + + mutex_lock(&test_fw_mutex); + if (test_fw_config->reqs) { + pr_err("Must call release_all_firmware prior to changing config\n"); + rc = -EINVAL; + mutex_unlock(&test_fw_mutex); + goto out; + } + mutex_unlock(&test_fw_mutex); + + rc = test_dev_config_update_size_t(buf, count, + &test_fw_config->buf_size); + +out: + return rc; +} + +static ssize_t config_buf_size_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + return test_dev_config_show_size_t(buf, test_fw_config->buf_size); +} +static DEVICE_ATTR_RW(config_buf_size); + +static ssize_t config_file_offset_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + int rc; + + mutex_lock(&test_fw_mutex); + if (test_fw_config->reqs) { + pr_err("Must call release_all_firmware prior to changing config\n"); + rc = -EINVAL; + mutex_unlock(&test_fw_mutex); + goto out; + } + mutex_unlock(&test_fw_mutex); + + rc = test_dev_config_update_size_t(buf, count, + &test_fw_config->file_offset); + +out: + return rc; +} + +static ssize_t config_file_offset_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + return test_dev_config_show_size_t(buf, test_fw_config->file_offset); +} +static DEVICE_ATTR_RW(config_file_offset); + +static ssize_t config_partial_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + return test_dev_config_update_bool(buf, + count, + &test_fw_config->partial); +} + +static ssize_t config_partial_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + return test_dev_config_show_bool(buf, test_fw_config->partial); +} +static DEVICE_ATTR_RW(config_partial); + static ssize_t config_sync_direct_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) @@ -650,11 +767,21 @@ static int test_fw_run_batch_request(void *data) if (!test_buf) return -ENOSPC; - req->rc = request_firmware_into_buf(&req->fw, - req->name, - req->dev, - test_buf, - TEST_FIRMWARE_BUF_SIZE); + if (test_fw_config->partial) + req->rc = request_partial_firmware_into_buf + (&req->fw, + req->name, + req->dev, + test_buf, + test_fw_config->buf_size, + test_fw_config->file_offset); + else + req->rc = request_firmware_into_buf + (&req->fw, + req->name, + req->dev, + test_buf, + test_fw_config->buf_size); if (!req->fw) kfree(test_buf); } else { @@ -927,6 +1054,9 @@ static struct attribute *test_dev_attrs[] = { TEST_FW_DEV_ATTR(config_name), TEST_FW_DEV_ATTR(config_num_requests), TEST_FW_DEV_ATTR(config_into_buf), + TEST_FW_DEV_ATTR(config_buf_size), + TEST_FW_DEV_ATTR(config_file_offset), + TEST_FW_DEV_ATTR(config_partial), TEST_FW_DEV_ATTR(config_sync_direct), TEST_FW_DEV_ATTR(config_send_uevent), TEST_FW_DEV_ATTR(config_read_fw_idx),