From patchwork Mon Aug 17 22:04:11 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Eric W. Biederman" X-Patchwork-Id: 1346519 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: incoming-bpf@patchwork.ozlabs.org Delivered-To: patchwork-incoming-bpf@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=bpf-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=xmission.com Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4BVpBB17yFz9sTN for ; Tue, 18 Aug 2020 08:09:54 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728426AbgHQWJr (ORCPT ); Mon, 17 Aug 2020 18:09:47 -0400 Received: from out01.mta.xmission.com ([166.70.13.231]:46442 "EHLO out01.mta.xmission.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730094AbgHQWJn (ORCPT ); Mon, 17 Aug 2020 18:09:43 -0400 Received: from in02.mta.xmission.com ([166.70.13.52]) by out01.mta.xmission.com with esmtps (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.93) (envelope-from ) id 1k7nK2-004vqa-O1; Mon, 17 Aug 2020 16:09:42 -0600 Received: from ip68-227-160-95.om.om.cox.net ([68.227.160.95] helo=x220.int.ebiederm.org) by in02.mta.xmission.com with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.87) (envelope-from ) id 1k7nK2-0004PB-1w; Mon, 17 Aug 2020 16:09:42 -0600 From: "Eric W. Biederman" To: linux-kernel@vger.kernel.org Cc: linux-fsdevel@vger.kernel.org, criu@openvz.org, bpf@vger.kernel.org, Linus Torvalds , Alexander Viro , Christian Brauner , Oleg Nesterov , Cyrill Gorcunov , Jann Horn , Kees Cook , =?utf-8?q?Daniel_P=2E_Berrang?= =?utf-8?b?w6k=?= , Jeff Layton , Miklos Szeredi , Matthew Wilcox , "J. Bruce Fields" , Matthew Wilcox , Trond Myklebust , Chris Wright , Alexei Starovoitov , Daniel Borkmann , Martin KaFai Lau , Song Liu , Yonghong Song , Andrii Nakryiko , John Fastabend , KP Singh , "Eric W. Biederman" Date: Mon, 17 Aug 2020 17:04:11 -0500 Message-Id: <20200817220425.9389-3-ebiederm@xmission.com> X-Mailer: git-send-email 2.25.0 In-Reply-To: <87ft8l6ic3.fsf@x220.int.ebiederm.org> References: <87ft8l6ic3.fsf@x220.int.ebiederm.org> MIME-Version: 1.0 X-XM-SPF: eid=1k7nK2-0004PB-1w; ; ; mid=<20200817220425.9389-3-ebiederm@xmission.com>; ; ; hst=in02.mta.xmission.com; ; ; ip=68.227.160.95; ; ; frm=ebiederm@xmission.com; ; ; spf=neutral X-XM-AID: U2FsdGVkX19xZrYaiA6k9ZXiv8T/iVb4LyAeyhzSBjQ= X-SA-Exim-Connect-IP: 68.227.160.95 X-SA-Exim-Mail-From: ebiederm@xmission.com X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on sa06.xmission.com X-Spam-Level: * X-Spam-Status: No, score=1.3 required=8.0 tests=ALL_TRUSTED,BAYES_50, DCC_CHECK_NEGATIVE,T_TooManySym_01,XMNoVowels autolearn=disabled version=3.4.2 X-Spam-Report: * -1.0 ALL_TRUSTED Passed through trusted hosts only via SMTP * 0.8 BAYES_50 BODY: Bayes spam probability is 40 to 60% * [score: 0.5000] * 1.5 XMNoVowels Alpha-numberic number with no vowels * -0.0 DCC_CHECK_NEGATIVE Not listed in DCC * [sa06 0; Body=1 Fuz1=1 Fuz2=1] * 0.0 T_TooManySym_01 4+ unique symbols in subject X-Spam-DCC: ; sa06 0; Body=1 Fuz1=1 Fuz2=1 X-Spam-Combo: *;linux-kernel@vger.kernel.org X-Spam-Relay-Country: X-Spam-Timing: total 325 ms - load_scoreonly_sql: 0.05 (0.0%), signal_user_changed: 11 (3.3%), b_tie_ro: 9 (2.8%), parse: 1.04 (0.3%), extract_message_metadata: 10 (3.2%), get_uri_detail_list: 0.97 (0.3%), tests_pri_-1000: 14 (4.4%), tests_pri_-950: 1.30 (0.4%), tests_pri_-900: 1.06 (0.3%), tests_pri_-90: 74 (22.6%), check_bayes: 72 (22.2%), b_tokenize: 8 (2.6%), b_tok_get_all: 6 (2.0%), b_comp_prob: 2.1 (0.6%), b_tok_touch_all: 51 (15.8%), b_finish: 0.91 (0.3%), tests_pri_0: 201 (61.7%), check_dkim_signature: 0.53 (0.2%), check_dkim_adsp: 2.4 (0.7%), poll_dns_idle: 0.68 (0.2%), tests_pri_10: 2.1 (0.7%), tests_pri_500: 7 (2.2%), rewrite_mail: 0.00 (0.0%) Subject: [PATCH 03/17] exec: Remove reset_files_struct X-Spam-Flag: No X-SA-Exim-Version: 4.2.1 (built Thu, 05 May 2016 13:38:54 -0600) X-SA-Exim-Scanned: Yes (on in02.mta.xmission.com) Sender: bpf-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org Now that exec no longer needs to restore the previous value of current->files on error there are no more callers of reset_files_struct so remove it. Signed-off-by: "Eric W. Biederman" Acked-by: Christian Brauner --- fs/file.c | 12 ------------ include/linux/fdtable.h | 1 - 2 files changed, 13 deletions(-) diff --git a/fs/file.c b/fs/file.c index 21c0893f2f1d..c585dbaf31a3 100644 --- a/fs/file.c +++ b/fs/file.c @@ -435,18 +435,6 @@ void put_files_struct(struct files_struct *files) } } -void reset_files_struct(struct files_struct *files) -{ - struct task_struct *tsk = current; - struct files_struct *old; - - old = tsk->files; - task_lock(tsk); - tsk->files = files; - task_unlock(tsk); - put_files_struct(old); -} - void exit_files(struct task_struct *tsk) { struct files_struct * files = tsk->files; diff --git a/include/linux/fdtable.h b/include/linux/fdtable.h index f46a084b60b2..7cc9885044d9 100644 --- a/include/linux/fdtable.h +++ b/include/linux/fdtable.h @@ -108,7 +108,6 @@ struct task_struct; struct files_struct *get_files_struct(struct task_struct *); void put_files_struct(struct files_struct *fs); -void reset_files_struct(struct files_struct *); int unshare_files(void); struct files_struct *dup_fd(struct files_struct *, unsigned, int *) __latent_entropy; void do_close_on_exec(struct files_struct *);