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: 12125885 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=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,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 06A6CC433E6 for ; Tue, 9 Mar 2021 15:55:21 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 7620865242 for ; Tue, 9 Mar 2021 15:55:20 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7620865242 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 0C8D28D0107; Tue, 9 Mar 2021 10:55:20 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 083B28D007F; Tue, 9 Mar 2021 10:55:19 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id E1E918D0107; Tue, 9 Mar 2021 10:55:19 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0246.hostedemail.com [216.40.44.246]) by kanga.kvack.org (Postfix) with ESMTP id C02688D007F for ; Tue, 9 Mar 2021 10:55:19 -0500 (EST) Received: from smtpin28.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 6F4FF12DE for ; Tue, 9 Mar 2021 15:55:19 +0000 (UTC) X-FDA: 77900785158.28.58022B9 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by imf30.hostedemail.com (Postfix) with ESMTP id B631EE007A49 for ; Tue, 9 Mar 2021 15:55:05 +0000 (UTC) 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 X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: B631EE007A49 X-Stat-Signature: kay6qz63cpisjek6cqusg8d3ri5455sa Received-SPF: none (casper.srs.infradead.org>: No applicable sender policy available) receiver=imf30; identity=mailfrom; envelope-from=""; helo=casper.infradead.org; client-ip=90.155.50.34 X-HE-DKIM-Result: pass/pass X-HE-Tag: 1615305305-463304 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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 */