Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933046AbcKNKB0 (ORCPT ); Mon, 14 Nov 2016 05:01:26 -0500 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:36249 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753423AbcKNKBP (ORCPT ); Mon, 14 Nov 2016 05:01:15 -0500 From: Nayna Jain To: tpmdd-devel@lists.sourceforge.net Cc: peterhuewe@gmx.de, tpmdd@selhorst.net, jarkko.sakkinen@linux.intel.com, jgunthorpe@obsidianresearch.com, linux-kernel@vger.kernel.org, linux-security-module@vger.kernel.org, Nayna Jain Subject: [PATCH v6 1/9] tpm: define a generic open() method for ascii & bios measurements Date: Mon, 14 Nov 2016 05:00:48 -0500 X-Mailer: git-send-email 2.5.0 In-Reply-To: <1479117656-12403-1-git-send-email-nayna@linux.vnet.ibm.com> References: <1479117656-12403-1-git-send-email-nayna@linux.vnet.ibm.com> X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 16111410-0012-0000-0000-000001E83CDD X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 16111410-0013-0000-0000-0000066D06DA Message-Id: <1479117656-12403-2-git-send-email-nayna@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2016-11-14_03:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=3 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1609300000 definitions=main-1611140206 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4485 Lines: 140 open() method for event log ascii and binary bios measurements file operations are very similar. This patch refactors the code into a single open() call by passing seq_operations as i_node->private data. Suggested-by: Jason Gunthorpe Signed-off-by: Nayna Jain Reviewed-by: Jarkko Sakkinen Reviewed-by: Jason Gunthorpe Tested-by: Jarkko Sakkinen Signed-off-by: Jarkko Sakkinen --- drivers/char/tpm/tpm_eventlog.c | 63 ++++++++++------------------------------- 1 file changed, 15 insertions(+), 48 deletions(-) diff --git a/drivers/char/tpm/tpm_eventlog.c b/drivers/char/tpm/tpm_eventlog.c index e722886..42b49c4 100644 --- a/drivers/char/tpm/tpm_eventlog.c +++ b/drivers/char/tpm/tpm_eventlog.c @@ -7,6 +7,7 @@ * Stefan Berger * Reiner Sailer * Kylene Hall + * Nayna Jain * * Maintained by: * @@ -304,26 +305,28 @@ static int tpm_ascii_bios_measurements_show(struct seq_file *m, void *v) return 0; } -static const struct seq_operations tpm_ascii_b_measurments_seqops = { +static const struct seq_operations tpm_ascii_b_measurements_seqops = { .start = tpm_bios_measurements_start, .next = tpm_bios_measurements_next, .stop = tpm_bios_measurements_stop, .show = tpm_ascii_bios_measurements_show, }; -static const struct seq_operations tpm_binary_b_measurments_seqops = { +static const struct seq_operations tpm_binary_b_measurements_seqops = { .start = tpm_bios_measurements_start, .next = tpm_bios_measurements_next, .stop = tpm_bios_measurements_stop, .show = tpm_binary_bios_measurements_show, }; -static int tpm_ascii_bios_measurements_open(struct inode *inode, +static int tpm_bios_measurements_open(struct inode *inode, struct file *file) { int err; struct tpm_bios_log *log; struct seq_file *seq; + const struct seq_operations *seqops = + (const struct seq_operations *)inode->i_private; log = kzalloc(sizeof(struct tpm_bios_log), GFP_KERNEL); if (!log) @@ -333,7 +336,7 @@ static int tpm_ascii_bios_measurements_open(struct inode *inode, goto out_free; /* now register seq file */ - err = seq_open(file, &tpm_ascii_b_measurments_seqops); + err = seq_open(file, seqops); if (!err) { seq = file->private_data; seq->private = log; @@ -349,46 +352,8 @@ static int tpm_ascii_bios_measurements_open(struct inode *inode, goto out; } -static const struct file_operations tpm_ascii_bios_measurements_ops = { - .open = tpm_ascii_bios_measurements_open, - .read = seq_read, - .llseek = seq_lseek, - .release = tpm_bios_measurements_release, -}; - -static int tpm_binary_bios_measurements_open(struct inode *inode, - struct file *file) -{ - int err; - struct tpm_bios_log *log; - struct seq_file *seq; - - log = kzalloc(sizeof(struct tpm_bios_log), GFP_KERNEL); - if (!log) - return -ENOMEM; - - if ((err = read_log(log))) - goto out_free; - - /* now register seq file */ - err = seq_open(file, &tpm_binary_b_measurments_seqops); - if (!err) { - seq = file->private_data; - seq->private = log; - } else { - goto out_free; - } - -out: - return err; -out_free: - kfree(log->bios_event_log); - kfree(log); - goto out; -} - -static const struct file_operations tpm_binary_bios_measurements_ops = { - .open = tpm_binary_bios_measurements_open, +static const struct file_operations tpm_bios_measurements_ops = { + .open = tpm_bios_measurements_open, .read = seq_read, .llseek = seq_lseek, .release = tpm_bios_measurements_release, @@ -413,15 +378,17 @@ struct dentry **tpm_bios_log_setup(const char *name) bin_file = securityfs_create_file("binary_bios_measurements", - S_IRUSR | S_IRGRP, tpm_dir, NULL, - &tpm_binary_bios_measurements_ops); + S_IRUSR | S_IRGRP, tpm_dir, + (void *)&tpm_binary_b_measurements_seqops, + &tpm_bios_measurements_ops); if (is_bad(bin_file)) goto out_tpm; ascii_file = securityfs_create_file("ascii_bios_measurements", - S_IRUSR | S_IRGRP, tpm_dir, NULL, - &tpm_ascii_bios_measurements_ops); + S_IRUSR | S_IRGRP, tpm_dir, + (void *)&tpm_ascii_b_measurements_seqops, + &tpm_bios_measurements_ops); if (is_bad(ascii_file)) goto out_bin; -- 2.5.0