From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 12A7AC43603 for ; Wed, 11 Dec 2019 18:29:05 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id C51EC222C4 for ; Wed, 11 Dec 2019 18:29:04 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C51EC222C4 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.ibm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 47Y56k0TMMzDqpR for ; Thu, 12 Dec 2019 05:29:02 +1100 (AEDT) Received: from ozlabs.org (bilbo.ozlabs.org [IPv6:2401:3900:2:1::2]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 47Y21q3rxRzDqjj for ; Thu, 12 Dec 2019 03:09:35 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.ibm.com Received: from ozlabs.org (bilbo.ozlabs.org [IPv6:2401:3900:2:1::2]) by bilbo.ozlabs.org (Postfix) with ESMTP id 47Y21p6b2Mz8wHf for ; Thu, 12 Dec 2019 03:09:34 +1100 (AEDT) Received: by ozlabs.org (Postfix) id 47Y21p3mWyzB3y5; Thu, 12 Dec 2019 03:09:34 +1100 (AEDT) Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=linux.ibm.com (client-ip=148.163.158.5; helo=mx0a-001b2d01.pphosted.com; envelope-from=sourabhjain@linux.ibm.com; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.ibm.com Received: from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 47Y21n3rKRz9sfR for ; Thu, 12 Dec 2019 03:09:33 +1100 (AEDT) Received: from pps.filterd (m0098420.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id xBBG7XiC062744 for ; Wed, 11 Dec 2019 11:09:31 -0500 Received: from e06smtp01.uk.ibm.com (e06smtp01.uk.ibm.com [195.75.94.97]) by mx0b-001b2d01.pphosted.com with ESMTP id 2wu1fmeggg-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Wed, 11 Dec 2019 11:09:31 -0500 Received: from localhost by e06smtp01.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Wed, 11 Dec 2019 16:09:26 -0000 Received: from b06wcsmtp001.portsmouth.uk.ibm.com (b06wcsmtp001.portsmouth.uk.ibm.com [9.149.105.160]) by b06cxnps4076.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id xBBG9O5454853638 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 11 Dec 2019 16:09:24 GMT Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 7F21FA405B; Wed, 11 Dec 2019 16:09:24 +0000 (GMT) Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 30AD8A4054; Wed, 11 Dec 2019 16:09:22 +0000 (GMT) Received: from localhost.localdomain.com (unknown [9.85.74.172]) by b06wcsmtp001.portsmouth.uk.ibm.com (Postfix) with ESMTP; Wed, 11 Dec 2019 16:09:21 +0000 (GMT) From: Sourabh Jain To: mpe@ellerman.id.au Subject: [PATCH v6 2/6] sysfs: wrap __compat_only_sysfs_link_entry_to_kobj function to change the symlink name Date: Wed, 11 Dec 2019 21:39:06 +0530 X-Mailer: git-send-email 2.17.2 In-Reply-To: <20191211160910.21656-1-sourabhjain@linux.ibm.com> References: <20191211160910.21656-1-sourabhjain@linux.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 19121116-4275-0000-0000-0000038E019D X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19121116-4276-0000-0000-000038A1B82A Message-Id: <20191211160910.21656-3-sourabhjain@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.95,18.0.572 definitions=2019-12-11_04:2019-12-11,2019-12-11 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 priorityscore=1501 bulkscore=0 spamscore=0 lowpriorityscore=0 malwarescore=0 mlxscore=0 mlxlogscore=999 impostorscore=0 phishscore=0 adultscore=0 suspectscore=1 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-1910280000 definitions=main-1912110136 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: corbet@lwn.net, mahesh@linux.vnet.ibm.com, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, Sourabh Jain , linuxppc-dev@ozlabs.org, gregkh@linuxfoundation.org, hbathini@linux.ibm.com Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" The __compat_only_sysfs_link_entry_to_kobj function creates a symlink to a kobject but doesn't provide an option to change the symlink file name. This patch adds a wrapper function compat_only_sysfs_link_entry_to_kobj that extends the __compat_only_sysfs_link_entry_to_kobj functionality which allows function caller to customize the symlink name. Signed-off-by: Sourabh Jain --- fs/sysfs/group.c | 28 +++++++++++++++++++++++++--- include/linux/sysfs.h | 12 ++++++++++++ 2 files changed, 37 insertions(+), 3 deletions(-) diff --git a/fs/sysfs/group.c b/fs/sysfs/group.c index d41c21fef138..0993645f0b59 100644 --- a/fs/sysfs/group.c +++ b/fs/sysfs/group.c @@ -424,6 +424,25 @@ EXPORT_SYMBOL_GPL(sysfs_remove_link_from_group); int __compat_only_sysfs_link_entry_to_kobj(struct kobject *kobj, struct kobject *target_kobj, const char *target_name) +{ + return compat_only_sysfs_link_entry_to_kobj(kobj, target_kobj, + target_name, NULL); +} +EXPORT_SYMBOL_GPL(__compat_only_sysfs_link_entry_to_kobj); + +/** + * compat_only_sysfs_link_entry_to_kobj - add a symlink to a kobject pointing + * to a group or an attribute + * @kobj: The kobject containing the group. + * @target_kobj: The target kobject. + * @target_name: The name of the target group or attribute. + * @symlink_name: The name of the symlink file (target_name will be + * considered if symlink_name is NULL). + */ +int compat_only_sysfs_link_entry_to_kobj(struct kobject *kobj, + struct kobject *target_kobj, + const char *target_name, + const char *symlink_name) { struct kernfs_node *target; struct kernfs_node *entry; @@ -448,12 +467,15 @@ int __compat_only_sysfs_link_entry_to_kobj(struct kobject *kobj, return -ENOENT; } - link = kernfs_create_link(kobj->sd, target_name, entry); + if (!symlink_name) + symlink_name = target_name; + + link = kernfs_create_link(kobj->sd, symlink_name, entry); if (IS_ERR(link) && PTR_ERR(link) == -EEXIST) - sysfs_warn_dup(kobj->sd, target_name); + sysfs_warn_dup(kobj->sd, symlink_name); kernfs_put(entry); kernfs_put(target); return PTR_ERR_OR_ZERO(link); } -EXPORT_SYMBOL_GPL(__compat_only_sysfs_link_entry_to_kobj); +EXPORT_SYMBOL_GPL(compat_only_sysfs_link_entry_to_kobj); diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h index 5420817ed317..15b195a4529d 100644 --- a/include/linux/sysfs.h +++ b/include/linux/sysfs.h @@ -300,6 +300,10 @@ void sysfs_remove_link_from_group(struct kobject *kobj, const char *group_name, int __compat_only_sysfs_link_entry_to_kobj(struct kobject *kobj, struct kobject *target_kobj, const char *target_name); +int compat_only_sysfs_link_entry_to_kobj(struct kobject *kobj, + struct kobject *target_kobj, + const char *target_name, + const char *symlink_name); void sysfs_notify(struct kobject *kobj, const char *dir, const char *attr); @@ -508,6 +512,14 @@ static inline int __compat_only_sysfs_link_entry_to_kobj( return 0; } +static int compat_only_sysfs_link_entry_to_kobj(struct kobject *kobj, + struct kobject *target_kobj, + const char *target_name, + const char *symlink_name) +{ + return 0; +} + static inline void sysfs_notify(struct kobject *kobj, const char *dir, const char *attr) { -- 2.17.2