From patchwork Tue Mar 9 15:53:41 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 12125869 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=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 07DCCC433E0 for ; Tue, 9 Mar 2021 15:55:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9D0B865242 for ; Tue, 9 Mar 2021 15:55:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231571AbhCIPzQ (ORCPT ); Tue, 9 Mar 2021 10:55:16 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49014 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231651AbhCIPy4 (ORCPT ); Tue, 9 Mar 2021 10:54:56 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 67A24C06174A; Tue, 9 Mar 2021 07:54:56 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=TAB/jSR7P4i0tEpg6lVq01ZMIeZeWk00j+JpXBqlTDM=; b=T+H3yeYw5iLZv7pUgmsb25tUIS qPrxwvgXhTEZ/+r7gvFNaBtHWVhs+PHbFoxnkj3u3ZSdxQ1KPpmoPcESzA3k/SeQfbnnw7C7vmFV4 ht9K8Nznds34Ck8c6U8ozAmgx/WZQEIqhVXZbzxQSPAkP1/qbORT5eOL56k3VB2PCjAbitpXHbgpu eiUF8/HeYWm75kV2gwxDcBw/l/+jgr0vuiYgcG+wnyVuvaRla7CnP3FJUd9MYQ7g8c4vFTQtC0aGz WlQPsUmOhiOmPqoIXuA+dDB2dUutIqClmDeHaP1qDtnQAjooDHIbfuprZiwSY9pToikcKK3d8G5z+ Cxq7OdwQ==; Received: from [2001:4bb8:180:9884:c70:4a89:bc61:3] (helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.94 #2 (Red Hat Linux)) id 1lJegY-000lMp-OH; Tue, 09 Mar 2021 15:54:23 +0000 From: Christoph Hellwig To: Al Viro Cc: Andrew Morton , Daniel Vetter , Nadav Amit , "VMware, Inc." , "Michael S. Tsirkin" , David Hildenbrand , Minchan Kim , Nitin Gupta , Jason Gunthorpe , Alex Williamson , linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 2/9] fs: add an argument-less alloc_anon_inode Date: Tue, 9 Mar 2021 16:53:41 +0100 Message-Id: <20210309155348.974875-3-hch@lst.de> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20210309155348.974875-1-hch@lst.de> References: <20210309155348.974875-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org Add a new alloc_anon_inode helper that allocates an inode on the anon_inode file system. Signed-off-by: Christoph Hellwig Reviewed-by: David Hildenbrand Reviewed-by: Gao Xiang Reviewed-by: Christian Brauner --- fs/anon_inodes.c | 15 +++++++++++++-- include/linux/anon_inodes.h | 1 + 2 files changed, 14 insertions(+), 2 deletions(-) diff --git a/fs/anon_inodes.c b/fs/anon_inodes.c index 4745fc37014332..b6a8ea71920bc3 100644 --- a/fs/anon_inodes.c +++ b/fs/anon_inodes.c @@ -63,7 +63,7 @@ static struct inode *anon_inode_make_secure_inode( const struct qstr qname = QSTR_INIT(name, strlen(name)); int error; - inode = alloc_anon_inode_sb(anon_inode_mnt->mnt_sb); + inode = alloc_anon_inode(); if (IS_ERR(inode)) return inode; inode->i_flags &= ~S_PRIVATE; @@ -225,13 +225,24 @@ int anon_inode_getfd_secure(const char *name, const struct file_operations *fops } EXPORT_SYMBOL_GPL(anon_inode_getfd_secure); +/** + * alloc_anon_inode - create a new anonymous inode + * + * Create an inode on the anon_inode file system and return it. + */ +struct inode *alloc_anon_inode(void) +{ + return alloc_anon_inode_sb(anon_inode_mnt->mnt_sb); +} +EXPORT_SYMBOL_GPL(alloc_anon_inode); + static int __init anon_inode_init(void) { anon_inode_mnt = kern_mount(&anon_inode_fs_type); if (IS_ERR(anon_inode_mnt)) panic("anon_inode_init() kernel mount failed (%ld)\n", PTR_ERR(anon_inode_mnt)); - anon_inode_inode = alloc_anon_inode_sb(anon_inode_mnt->mnt_sb); + anon_inode_inode = alloc_anon_inode(); if (IS_ERR(anon_inode_inode)) panic("anon_inode_init() inode allocation failed (%ld)\n", PTR_ERR(anon_inode_inode)); diff --git a/include/linux/anon_inodes.h b/include/linux/anon_inodes.h index 71881a2b6f7860..b5ae9a6eda9923 100644 --- a/include/linux/anon_inodes.h +++ b/include/linux/anon_inodes.h @@ -21,6 +21,7 @@ int anon_inode_getfd_secure(const char *name, const struct file_operations *fops, void *priv, int flags, const struct inode *context_inode); +struct inode *alloc_anon_inode(void); #endif /* _LINUX_ANON_INODES_H */