From patchwork Sat Oct 1 12:41:17 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jarkko Sakkinen X-Patchwork-Id: 9359263 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 CE623600C8 for ; Sat, 1 Oct 2016 12:42:13 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BFA1A28F01 for ; Sat, 1 Oct 2016 12:42:13 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B458C28FBA; Sat, 1 Oct 2016 12:42:13 +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=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from lists.sourceforge.net (lists.sourceforge.net [216.34.181.88]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 2FB9728F01 for ; Sat, 1 Oct 2016 12:42:13 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=sfs-ml-4.v29.ch3.sourceforge.com) by sfs-ml-4.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1bqJcK-00049w-1j; Sat, 01 Oct 2016 12:42:12 +0000 Received: from sog-mx-2.v43.ch3.sourceforge.com ([172.29.43.192] helo=mx.sourceforge.net) by sfs-ml-4.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1bqJcI-00049q-VX for tpmdd-devel@lists.sourceforge.net; Sat, 01 Oct 2016 12:42:10 +0000 X-ACL-Warn: Received: from mga04.intel.com ([192.55.52.120]) by sog-mx-2.v43.ch3.sourceforge.com with esmtps (TLSv1:AES256-SHA:256) (Exim 4.76) id 1bqJcH-0002qS-Q8 for tpmdd-devel@lists.sourceforge.net; Sat, 01 Oct 2016 12:42:10 +0000 Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga104.fm.intel.com with ESMTP; 01 Oct 2016 05:42:04 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos; i="5.31,426,1473145200"; d="scan'208"; a="1064841596" Received: from vdussau1-mobl2.ger.corp.intel.com (HELO localhost) ([10.252.5.8]) by fmsmga002.fm.intel.com with ESMTP; 01 Oct 2016 05:42:00 -0700 From: Jarkko Sakkinen To: Peter Huewe Date: Sat, 1 Oct 2016 15:41:17 +0300 Message-Id: <1475325678-16573-3-git-send-email-jarkko.sakkinen@linux.intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1475325678-16573-1-git-send-email-jarkko.sakkinen@linux.intel.com> References: <1475325678-16573-1-git-send-email-jarkko.sakkinen@linux.intel.com> X-Headers-End: 1bqJcH-0002qS-Q8 Cc: open list , "moderated list:TPM DEVICE DRIVER" Subject: [tpmdd-devel] [PATCH 2/2] tpm: replace dynamically allocated bios_dir with a static array X-BeenThere: tpmdd-devel@lists.sourceforge.net X-Mailman-Version: 2.1.9 Precedence: list List-Id: Tpm Device Driver maintainance List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: tpmdd-devel-bounces@lists.sourceforge.net X-Virus-Scanned: ClamAV using ClamSMTP This commit is based on a commit by Nayna Jain. Replaced dynamically allocated bios_dir with a static array as the size is always constant. Suggested-by: Jason Gunthorpe Signed-off-by: Nayna Jain Signed-off-by: Jarkko Sakkinen --- drivers/char/tpm/tpm-chip.c | 9 +++--- drivers/char/tpm/tpm.h | 3 +- drivers/char/tpm/tpm_eventlog.c | 62 +++++++++++++++++++---------------------- drivers/char/tpm/tpm_eventlog.h | 10 +++---- 4 files changed, 41 insertions(+), 43 deletions(-) diff --git a/drivers/char/tpm/tpm-chip.c b/drivers/char/tpm/tpm-chip.c index e595013..a56b609 100644 --- a/drivers/char/tpm/tpm-chip.c +++ b/drivers/char/tpm/tpm-chip.c @@ -278,14 +278,16 @@ static void tpm_del_char_device(struct tpm_chip *chip) static int tpm1_chip_register(struct tpm_chip *chip) { + int rc; + if (chip->flags & TPM_CHIP_FLAG_TPM2) return 0; tpm_sysfs_add_device(chip); - chip->bios_dir = tpm_bios_log_setup(dev_name(&chip->dev)); + rc = tpm_bios_log_setup(chip); - return 0; + return rc; } static void tpm1_chip_unregister(struct tpm_chip *chip) @@ -293,8 +295,7 @@ static void tpm1_chip_unregister(struct tpm_chip *chip) if (chip->flags & TPM_CHIP_FLAG_TPM2) return; - if (chip->bios_dir) - tpm_bios_log_teardown(chip->bios_dir); + tpm_bios_log_teardown(chip); } static void tpm_del_legacy_sysfs(struct tpm_chip *chip) diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h index 4d183c9..c8ce0df 100644 --- a/drivers/char/tpm/tpm.h +++ b/drivers/char/tpm/tpm.h @@ -40,6 +40,7 @@ enum tpm_const { TPM_BUFSIZE = 4096, TPM_NUM_DEVICES = 65536, TPM_RETRY = 50, /* 5 seconds */ + TPM_NUM_EVENT_LOG_FILES = 3, }; enum tpm_timeout { @@ -171,7 +172,7 @@ struct tpm_chip { unsigned long duration[3]; /* jiffies */ bool duration_adjusted; - struct dentry **bios_dir; + struct dentry *bios_dir[TPM_EVENT_LOG_FILES]; const struct attribute_group *groups[3]; unsigned int groups_cnt; diff --git a/drivers/char/tpm/tpm_eventlog.c b/drivers/char/tpm/tpm_eventlog.c index 75e6644..5138956 100644 --- a/drivers/char/tpm/tpm_eventlog.c +++ b/drivers/char/tpm/tpm_eventlog.c @@ -368,54 +368,50 @@ static int is_bad(void *p) return 0; } -struct dentry **tpm_bios_log_setup(const char *name) +int tpm_bios_log_setup(struct tpm_chip *chip) { - struct dentry **ret = NULL, *tpm_dir, *bin_file, *ascii_file; + const char *name = dev_name(&chip->dev); + unsigned int cnt; - tpm_dir = securityfs_create_dir(name, NULL); - if (is_bad(tpm_dir)) - goto out; + cnt = 0; + chip->bios_dir[cnt] = + securityfs_create_dir(name, NULL); + if (is_bad(chip->bios_dir[cnt])) + goto err; + cnt++; - bin_file = + chip->bios_dir[cnt] = securityfs_create_file("binary_bios_measurements", - S_IRUSR | S_IRGRP, tpm_dir, + S_IRUSR | S_IRGRP, chip->bios_dir[cnt], (void *)&tpm_binary_b_measurments_seqops, &tpm_bios_measurements_ops); - if (is_bad(bin_file)) - goto out_tpm; + if (is_bad(chip->bios_dir[cnt])) + goto err; + cnt++; - ascii_file = + chip->bios_dir[cnt] = securityfs_create_file("ascii_bios_measurements", - S_IRUSR | S_IRGRP, tpm_dir, + S_IRUSR | S_IRGRP, chip->bios_dir[cnt], (void *)&tpm_ascii_b_measurments_seqops, &tpm_bios_measurements_ops); - if (is_bad(ascii_file)) - goto out_bin; + if (is_bad(chip->bios_dir[cnt])) + goto err; + cnt++; - ret = kmalloc(3 * sizeof(struct dentry *), GFP_KERNEL); - if (!ret) - goto out_ascii; - - ret[0] = ascii_file; - ret[1] = bin_file; - ret[2] = tpm_dir; - - return ret; + return 0; -out_ascii: - securityfs_remove(ascii_file); -out_bin: - securityfs_remove(bin_file); -out_tpm: - securityfs_remove(tpm_dir); -out: - return NULL; +err: + chip->bios_dir[cnt] = NULL; + tpm_bios_log_teardown(chip); + return -EIO; } -void tpm_bios_log_teardown(struct dentry **lst) +void tpm_bios_log_teardown(struct tpm_chip *chip) { int i; - for (i = 0; i < 3; i++) - securityfs_remove(lst[i]); + for (i = (TPM_NUM_EVENT_LOG_FILES - 1); i >= 0; i--) { + if (chip->bios_dir[i]) + securityfs_remove(chip->bios_dir[i]); + } } diff --git a/drivers/char/tpm/tpm_eventlog.h b/drivers/char/tpm/tpm_eventlog.h index 8de62b0..fd3357e 100644 --- a/drivers/char/tpm/tpm_eventlog.h +++ b/drivers/char/tpm/tpm_eventlog.h @@ -77,14 +77,14 @@ int read_log(struct tpm_bios_log *log); #if defined(CONFIG_TCG_IBMVTPM) || defined(CONFIG_TCG_IBMVTPM_MODULE) || \ defined(CONFIG_ACPI) -extern struct dentry **tpm_bios_log_setup(const char *); -extern void tpm_bios_log_teardown(struct dentry **); +extern int tpm_bios_log_setup(struct tpm_chip *chip); +extern void tpm_bios_log_teardown(struct tpm_chip *chip); #else -static inline struct dentry **tpm_bios_log_setup(const char *name) +static inline int tpm_bios_log_setup(struct tpm_chip *chip) { - return NULL; + return 0; } -static inline void tpm_bios_log_teardown(struct dentry **dir) +static inline void tpm_bios_log_teardown(struct tpm_chip *chip) { } #endif