From patchwork Thu Jan 25 03:27:45 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Taras Kondratiuk X-Patchwork-Id: 10183595 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 7A63B60383 for ; Thu, 25 Jan 2018 03:41:57 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6D40F283BD for ; Thu, 25 Jan 2018 03:41:57 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 61C1328673; Thu, 25 Jan 2018 03:41:57 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-14.5 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,RCVD_IN_DNSWL_HI,USER_IN_DEF_DKIM_WL autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id F03F7283BD for ; Thu, 25 Jan 2018 03:41:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933351AbeAYDh2 (ORCPT ); Wed, 24 Jan 2018 22:37:28 -0500 Received: from alln-iport-3.cisco.com ([173.37.142.90]:38659 "EHLO alln-iport-3.cisco.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933348AbeAYDh0 (ORCPT ); Wed, 24 Jan 2018 22:37:26 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=3410; q=dns/txt; s=iport; t=1516851446; x=1518061046; h=from:to:cc:subject:date:message-id:in-reply-to: references; bh=OyyGL/Hzsjw90GOKv/V7+fXLDW3sW7eu7PxhPKZedBM=; b=MxiOBR1VOqaBy7Nozl4/sRyOoShuRLC0NUInj439BmpnnBiEjso+XuIm oWbmayhCH1JX1w4Kb5vs+yKVyEoLPT5oQ95w573w6f9kcJXA4EasA5vUO UcIU0tkEINny1fSo7B9BC+fqf80pY22FK19ywhM0QmcJteT4UOsOlZ8fl U=; X-IronPort-AV: E=Sophos;i="5.46,409,1511827200"; d="scan'208";a="61438468" Received: from rcdn-core-6.cisco.com ([173.37.93.157]) by alln-iport-3.cisco.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 25 Jan 2018 03:28:01 +0000 Received: from sjc-ads-7132.cisco.com (sjc-ads-7132.cisco.com [10.30.217.207]) (authenticated bits=0) by rcdn-core-6.cisco.com (8.14.5/8.14.5) with ESMTP id w0P3Ruiu007601 (version=TLSv1/SSLv3 cipher=AES128-SHA256 bits=128 verify=NO); Thu, 25 Jan 2018 03:28:00 GMT From: Taras Kondratiuk To: "H. Peter Anvin" , Al Viro , Arnd Bergmann , Rob Landley , Mimi Zohar , Jonathan Corbet , James McMechan Cc: initramfs@vger.kernel.org, Victor Kamensky , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-security-module@vger.kernel.org, xe-linux-external@cisco.com Subject: [PATCH v2 05/15] initramfs: move files creation into separate state Date: Thu, 25 Jan 2018 03:27:45 +0000 Message-Id: <1516850875-25066-6-git-send-email-takondra@cisco.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1516850875-25066-1-git-send-email-takondra@cisco.com> References: <1516850875-25066-1-git-send-email-takondra@cisco.com> X-Auto-Response-Suppress: DR, OOF, AutoReply X-Authenticated-User: takondra@cisco.com Sender: owner-linux-security-module@vger.kernel.org Precedence: bulk List-ID: X-Virus-Scanned: ClamAV using ClamSMTP Move most of the file creation logic into a separate state. This splits collection of data stage from data processing and makes it easier to add additional states for a new archive format. Signed-off-by: Taras Kondratiuk --- init/initramfs.c | 52 ++++++++++++++++++++++++++++++---------------------- 1 file changed, 30 insertions(+), 22 deletions(-) diff --git a/init/initramfs.c b/init/initramfs.c index d0ab7ad6ac05..2d5920c094e0 100644 --- a/init/initramfs.c +++ b/init/initramfs.c @@ -192,6 +192,7 @@ static int __init do_collect(void); static int __init do_header(void); static int __init do_skip(void); static int __init do_name(void); +static int __init do_create(void); static int __init do_copy(void); static int __init do_symlink(void); static int __init do_reset(void); @@ -292,12 +293,12 @@ static int __init do_reset(void) return 1; } -static int __init maybe_link(void) +static int __init maybe_link(char *name) { if (nlink >= 2) { - char *old = find_link(major, minor, ino, mode, collected); + char *old = find_link(major, minor, ino, mode, name); if (old) - return (sys_link(old, collected) < 0) ? -1 : 1; + return (sys_link(old, name) < 0) ? -1 : 1; } return 0; } @@ -321,52 +322,59 @@ static void *memcpy_optional(void *dest, const void *src, size_t n) return dest; } -static __initdata int wfd; - static int __init do_name(void) { - state = do_skip; - next_state = do_reset; if (strcmp(collected, "TRAILER!!!") == 0) { + state = do_skip; + next_state = do_reset; free_hash(); return 0; } - clean_path(collected, mode); + memcpy_optional(name_buf, collected, N_ALIGN(name_len)); + state = do_create; + return 0; +} + + +static __initdata int wfd; + +static int __init do_create(void) +{ + state = do_skip; + next_state = do_reset; + clean_path(name_buf, mode); if (S_ISREG(mode)) { - int ml = maybe_link(); + int ml = maybe_link(name_buf); if (ml >= 0) { int openflags = O_WRONLY|O_CREAT; if (ml != 1) openflags |= O_TRUNC; - wfd = sys_open(collected, openflags, mode); + wfd = sys_open(name_buf, openflags, mode); if (wfd >= 0) { sys_fchown(wfd, uid, gid); sys_fchmod(wfd, mode); if (body_len) sys_ftruncate(wfd, body_len); - memcpy_optional(name_buf, collected, - N_ALIGN(name_len)); state = do_copy; } } } else if (S_ISDIR(mode)) { - sys_mkdir(collected, mode); - sys_chown(collected, uid, gid); - sys_chmod(collected, mode); - dir_add(collected, mtime); + sys_mkdir(name_buf, mode); + sys_chown(name_buf, uid, gid); + sys_chmod(name_buf, mode); + dir_add(name_buf, mtime); } else if (S_ISBLK(mode) || S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) { - if (maybe_link() == 0) { - sys_mknod(collected, mode, rdev); - sys_chown(collected, uid, gid); - sys_chmod(collected, mode); - do_utime(collected, mtime); + if (maybe_link(name_buf) == 0) { + sys_mknod(name_buf, mode, rdev); + sys_chown(name_buf, uid, gid); + sys_chmod(name_buf, mode); + do_utime(name_buf, mtime); } } else if (S_ISLNK(mode)) { if (body_len > PATH_MAX) return 0; - memcpy_optional(name_buf, collected, N_ALIGN(name_len)); read_into(symlink_buf, body_len, do_symlink); } return 0;