From patchwork Fri Aug 26 10:25:55 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nilesh Javali X-Patchwork-Id: 12955848 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 87B46ECAAA3 for ; Fri, 26 Aug 2022 10:26:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1343670AbiHZK0Y (ORCPT ); Fri, 26 Aug 2022 06:26:24 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35792 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S245238AbiHZK0X (ORCPT ); Fri, 26 Aug 2022 06:26:23 -0400 Received: from mx0b-0016f401.pphosted.com (mx0b-0016f401.pphosted.com [67.231.156.173]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 06225CCE3F for ; Fri, 26 Aug 2022 03:26:21 -0700 (PDT) Received: from pps.filterd (m0045851.ppops.net [127.0.0.1]) by mx0b-0016f401.pphosted.com (8.17.1.5/8.17.1.5) with ESMTP id 27Q319Bj027726 for ; Fri, 26 Aug 2022 03:26:21 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=marvell.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type; s=pfpt0220; bh=zpVyerr0aa3TJnleEu21/cyVKgr0MINvHjUeMO8p+zs=; b=hC5+KrcWx7spcMALMzc5JnCks0U78M0XDbHQjBvAF1b0qYcvMBSs3DTLhS+X7c/Scb0h eivTBcdDiU18jMAUlzJPftrxiydjOzdNDmVC7NGazMLfTLhtZGZK+b26eKoJnvD9ilqE abeqvaNlms4uZmSjfbBdGjF9Qmksm6iXlD0TqBe16b1ELLH/Xlg4muEB8WVDjtr+T8xC 7KGaWgHjHNqBCbU61Fue2pjlVsVIZSpbieongBX+uYoijzZ0soAqBrepsCKmAvxHYMn0 8f0WeLzRJ1QEMQBl/+agkP5UqjQMao8yKZMJIMz9RalogBkWkJkiiKhc8reMnlMf45/d wg== Received: from dc5-exch01.marvell.com ([199.233.59.181]) by mx0b-0016f401.pphosted.com (PPS) with ESMTPS id 3j5a67na2p-2 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA384 bits=256 verify=NOT) for ; Fri, 26 Aug 2022 03:26:21 -0700 Received: from DC5-EXCH02.marvell.com (10.69.176.39) by DC5-EXCH01.marvell.com (10.69.176.38) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Fri, 26 Aug 2022 03:26:19 -0700 Received: from maili.marvell.com (10.69.176.80) by DC5-EXCH02.marvell.com (10.69.176.39) with Microsoft SMTP Server id 15.0.1497.18 via Frontend Transport; Fri, 26 Aug 2022 03:26:19 -0700 Received: from dut1171.mv.qlogic.com (unknown [10.112.88.18]) by maili.marvell.com (Postfix) with ESMTP id 966423F70F2; Fri, 26 Aug 2022 03:26:17 -0700 (PDT) From: Nilesh Javali To: CC: , , , Subject: [PATCH v2 3/7] qla2xxx: Add debugfs create/delete helpers Date: Fri, 26 Aug 2022 03:25:55 -0700 Message-ID: <20220826102559.17474-4-njavali@marvell.com> X-Mailer: git-send-email 2.12.0 In-Reply-To: <20220826102559.17474-1-njavali@marvell.com> References: <20220826102559.17474-1-njavali@marvell.com> MIME-Version: 1.0 X-Proofpoint-ORIG-GUID: md6wmRXFU74yP_02nCTPxPnBca2e9t9U X-Proofpoint-GUID: md6wmRXFU74yP_02nCTPxPnBca2e9t9U X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.895,Hydra:6.0.517,FMLib:17.11.122.1 definitions=2022-08-26_04,2022-08-25_01,2022-06-22_01 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org From: Arun Easi Define a few helpful macros for creating debugfs files. Signed-off-by: Arun Easi Signed-off-by: Nilesh Javali Reviewed-by: Himanshu Madhani --- drivers/scsi/qla2xxx/qla_def.h | 5 ++ drivers/scsi/qla2xxx/qla_dfs.c | 93 ++++++++++++++++++++++++++++++++++ 2 files changed, 98 insertions(+) diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h index 3ec6a200942e..22274b405d01 100644 --- a/drivers/scsi/qla2xxx/qla_def.h +++ b/drivers/scsi/qla2xxx/qla_def.h @@ -35,6 +35,11 @@ #include +#define QLA_DFS_DEFINE_DENTRY(_debugfs_file_name) \ + struct dentry *dfs_##_debugfs_file_name +#define QLA_DFS_ROOT_DEFINE_DENTRY(_debugfs_file_name) \ + struct dentry *qla_dfs_##_debugfs_file_name + /* Big endian Fibre Channel S_ID (source ID) or D_ID (destination ID). */ typedef struct { uint8_t domain; diff --git a/drivers/scsi/qla2xxx/qla_dfs.c b/drivers/scsi/qla2xxx/qla_dfs.c index 85bd0e468d43..777808af5634 100644 --- a/drivers/scsi/qla2xxx/qla_dfs.c +++ b/drivers/scsi/qla2xxx/qla_dfs.c @@ -489,6 +489,99 @@ qla_dfs_naqp_show(struct seq_file *s, void *unused) return 0; } +/* + * Helper macros for setting up debugfs entries. + * _name: The name of the debugfs entry + * _ctx_struct: The context that was passed when creating the debugfs file + * + * QLA_DFS_SETUP_RD could be used when there is only a show function. + * - show function take the name qla_dfs__show + * + * QLA_DFS_SETUP_RW could be used when there are both show and write functions. + * - show function take the name qla_dfs__show + * - write function take the name qla_dfs__write + * + * To have a new debugfs entry, do: + * 1. Create a "struct dentry *" in the appropriate structure in the format + * dfs_ + * 2. Setup debugfs entries using QLA_DFS_SETUP_RD / QLA_DFS_SETUP_RW + * 3. Create debugfs file in qla2x00_dfs_setup() using QLA_DFS_CREATE_FILE + * or QLA_DFS_ROOT_CREATE_FILE + * 4. Remove debugfs file in qla2x00_dfs_remove() using QLA_DFS_REMOVE_FILE + * or QLA_DFS_ROOT_REMOVE_FILE + * + * Example for creating "TEST" sysfs file: + * 1. struct qla_hw_data { ... struct dentry *dfs_TEST; } + * 2. QLA_DFS_SETUP_RD(TEST, scsi_qla_host_t); + * 3. In qla2x00_dfs_setup(): + * QLA_DFS_CREATE_FILE(ha, TEST, 0600, ha->dfs_dir, vha); + * 4. In qla2x00_dfs_remove(): + * QLA_DFS_REMOVE_FILE(ha, TEST); + */ +#define QLA_DFS_SETUP_RD(_name, _ctx_struct) \ +static int \ +qla_dfs_##_name##_open(struct inode *inode, struct file *file) \ +{ \ + _ctx_struct *__ctx = inode->i_private; \ + \ + return single_open(file, qla_dfs_##_name##_show, __ctx); \ +} \ + \ +static const struct file_operations qla_dfs_##_name##_ops = { \ + .open = qla_dfs_##_name##_open, \ + .read = seq_read, \ + .llseek = seq_lseek, \ + .release = single_release, \ +}; + +#define QLA_DFS_SETUP_RW(_name, _ctx_struct) \ +static int \ +qla_dfs_##_name##_open(struct inode *inode, struct file *file) \ +{ \ + _ctx_struct *__ctx = inode->i_private; \ + \ + return single_open(file, qla_dfs_##_name##_show, __ctx); \ +} \ + \ +static const struct file_operations qla_dfs_##_name##_ops = { \ + .open = qla_dfs_##_name##_open, \ + .read = seq_read, \ + .llseek = seq_lseek, \ + .release = single_release, \ + .write = qla_dfs_##_name##_write, \ +}; + +#define QLA_DFS_ROOT_CREATE_FILE(_name, _perm, _ctx) \ + do { \ + if (!qla_dfs_##_name) \ + qla_dfs_##_name = debugfs_create_file(#_name, \ + _perm, qla2x00_dfs_root, _ctx, \ + &qla_dfs_##_name##_ops); \ + } while (0) + +#define QLA_DFS_ROOT_REMOVE_FILE(_name) \ + do { \ + if (qla_dfs_##_name) { \ + debugfs_remove(qla_dfs_##_name); \ + qla_dfs_##_name = NULL; \ + } \ + } while (0) + +#define QLA_DFS_CREATE_FILE(_struct, _name, _perm, _parent, _ctx) \ + do { \ + (_struct)->dfs_##_name = debugfs_create_file(#_name, \ + _perm, _parent, _ctx, \ + &qla_dfs_##_name##_ops) \ + } while (0) + +#define QLA_DFS_REMOVE_FILE(_struct, _name) \ + do { \ + if ((_struct)->dfs_##_name) { \ + debugfs_remove((_struct)->dfs_##_name); \ + (_struct)->dfs_##_name = NULL; \ + } \ + } while (0) + static int qla_dfs_naqp_open(struct inode *inode, struct file *file) {