From patchwork Tue Jun 12 00:20:19 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tadeusz Struk X-Patchwork-Id: 10458977 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 72DFC60234 for ; Tue, 12 Jun 2018 00:20:50 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 60F042859F for ; Tue, 12 Jun 2018 00:20:50 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 55CB1285E5; Tue, 12 Jun 2018 00:20:50 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id EBECC2859F for ; Tue, 12 Jun 2018 00:20:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934475AbeFLAUW (ORCPT ); Mon, 11 Jun 2018 20:20:22 -0400 Received: from mga18.intel.com ([134.134.136.126]:65341 "EHLO mga18.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934348AbeFLAUU (ORCPT ); Mon, 11 Jun 2018 20:20:20 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga005.jf.intel.com ([10.7.209.41]) by orsmga106.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 11 Jun 2018 17:20:19 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.51,212,1526367600"; d="scan'208";a="231780790" Received: from tstruk-mobl1.jf.intel.com ([10.7.196.162]) by orsmga005.jf.intel.com with ESMTP; 11 Jun 2018 17:20:19 -0700 Subject: [PATCH v2 1/2] tpm: add ptr to the tpm_space struct to file_priv From: Tadeusz Struk To: jarkko.sakkinen@linux.intel.com Cc: jgg@ziepe.ca, linux-integrity@vger.kernel.org, tadeusz.struk@intel.com, linux-security-module@vger.kernel.org, linux-kernel@vger.kernel.org Date: Mon, 11 Jun 2018 17:20:19 -0700 Message-ID: <152876281905.19591.11473468647459659104.stgit@tstruk-mobl1.jf.intel.com> In-Reply-To: <152876281395.19591.3681365717212126222.stgit@tstruk-mobl1.jf.intel.com> References: <152876281395.19591.3681365717212126222.stgit@tstruk-mobl1.jf.intel.com> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 Sender: linux-integrity-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-integrity@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add a ptr to struct tpm_space to the file_priv to have an easy access to it in the async job without the need to allocate memory. This also allows to consolidate of the write operations for the two interfaces. Signed-off-by: Tadeusz Struk --- drivers/char/tpm/tpm-dev-common.c | 8 +++++--- drivers/char/tpm/tpm-dev.c | 10 ++-------- drivers/char/tpm/tpm-dev.h | 5 +++-- drivers/char/tpm/tpmrm-dev.c | 14 ++------------ 4 files changed, 12 insertions(+), 25 deletions(-) diff --git a/drivers/char/tpm/tpm-dev-common.c b/drivers/char/tpm/tpm-dev-common.c index e4a04b2d3c32..f0c033b69b62 100644 --- a/drivers/char/tpm/tpm-dev-common.c +++ b/drivers/char/tpm/tpm-dev-common.c @@ -43,9 +43,11 @@ static void timeout_work(struct work_struct *work) } void tpm_common_open(struct file *file, struct tpm_chip *chip, - struct file_priv *priv) + struct file_priv *priv, struct tpm_space *space) { priv->chip = chip; + priv->space = space; + mutex_init(&priv->buffer_mutex); timer_setup(&priv->user_read_timer, user_reader_timeout, 0); INIT_WORK(&priv->work, timeout_work); @@ -79,7 +81,7 @@ ssize_t tpm_common_read(struct file *file, char __user *buf, } ssize_t tpm_common_write(struct file *file, const char __user *buf, - size_t size, loff_t *off, struct tpm_space *space) + size_t size, loff_t *off) { struct file_priv *priv = file->private_data; size_t in_size = size; @@ -119,7 +121,7 @@ ssize_t tpm_common_write(struct file *file, const char __user *buf, mutex_unlock(&priv->buffer_mutex); return -EPIPE; } - out_size = tpm_transmit(priv->chip, space, priv->data_buffer, + out_size = tpm_transmit(priv->chip, priv->space, priv->data_buffer, sizeof(priv->data_buffer), 0); tpm_put_ops(priv->chip); diff --git a/drivers/char/tpm/tpm-dev.c b/drivers/char/tpm/tpm-dev.c index ebd74ab5abef..98b9630c3a36 100644 --- a/drivers/char/tpm/tpm-dev.c +++ b/drivers/char/tpm/tpm-dev.c @@ -39,7 +39,7 @@ static int tpm_open(struct inode *inode, struct file *file) if (priv == NULL) goto out; - tpm_common_open(file, chip, priv); + tpm_common_open(file, chip, priv, NULL); return 0; @@ -48,12 +48,6 @@ static int tpm_open(struct inode *inode, struct file *file) return -ENOMEM; } -static ssize_t tpm_write(struct file *file, const char __user *buf, - size_t size, loff_t *off) -{ - return tpm_common_write(file, buf, size, off, NULL); -} - /* * Called on file close */ @@ -73,6 +67,6 @@ const struct file_operations tpm_fops = { .llseek = no_llseek, .open = tpm_open, .read = tpm_common_read, - .write = tpm_write, + .write = tpm_common_write, .release = tpm_release, }; diff --git a/drivers/char/tpm/tpm-dev.h b/drivers/char/tpm/tpm-dev.h index b24cfb4d3ee1..4048677bbd78 100644 --- a/drivers/char/tpm/tpm-dev.h +++ b/drivers/char/tpm/tpm-dev.h @@ -6,6 +6,7 @@ struct file_priv { struct tpm_chip *chip; + struct tpm_space *space; /* Data passed to and from the tpm via the read/write calls */ size_t data_pending; @@ -18,11 +19,11 @@ struct file_priv { }; void tpm_common_open(struct file *file, struct tpm_chip *chip, - struct file_priv *priv); + struct file_priv *priv, struct tpm_space *space); ssize_t tpm_common_read(struct file *file, char __user *buf, size_t size, loff_t *off); ssize_t tpm_common_write(struct file *file, const char __user *buf, - size_t size, loff_t *off, struct tpm_space *space); + size_t size, loff_t *off); void tpm_common_release(struct file *file, struct file_priv *priv); #endif diff --git a/drivers/char/tpm/tpmrm-dev.c b/drivers/char/tpm/tpmrm-dev.c index 1a0e97a5da5a..96006c6b9696 100644 --- a/drivers/char/tpm/tpmrm-dev.c +++ b/drivers/char/tpm/tpmrm-dev.c @@ -28,7 +28,7 @@ static int tpmrm_open(struct inode *inode, struct file *file) return -ENOMEM; } - tpm_common_open(file, chip, &priv->priv); + tpm_common_open(file, chip, &priv->priv, &priv->space); return 0; } @@ -45,21 +45,11 @@ static int tpmrm_release(struct inode *inode, struct file *file) return 0; } -static ssize_t tpmrm_write(struct file *file, const char __user *buf, - size_t size, loff_t *off) -{ - struct file_priv *fpriv = file->private_data; - struct tpmrm_priv *priv = container_of(fpriv, struct tpmrm_priv, priv); - - return tpm_common_write(file, buf, size, off, &priv->space); -} - const struct file_operations tpmrm_fops = { .owner = THIS_MODULE, .llseek = no_llseek, .open = tpmrm_open, .read = tpm_common_read, - .write = tpmrm_write, + .write = tpm_common_write, .release = tpmrm_release, }; -