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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4E61AEB64DC for ; Fri, 21 Jul 2023 16:26:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232955AbjGUQ0D (ORCPT ); Fri, 21 Jul 2023 12:26:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52560 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232908AbjGUQZn (ORCPT ); Fri, 21 Jul 2023 12:25:43 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 31E8B5BB5 for ; Fri, 21 Jul 2023 09:22:33 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (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 dfw.source.kernel.org (Postfix) with ESMTPS id 5E23561D2A for ; Fri, 21 Jul 2023 16:22:30 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 65DF8C433C8; Fri, 21 Jul 2023 16:22:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1689956549; bh=X80EkxakP5s8ZAQYk5VOTP9TmuOIfEq+3sKaf5bC3Pc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=hIpEpHx/yLYEP+2xNvVRCC2Z1dP0sbYCJDaLqEliba5XH/nR/gWMgCXgv4mQVx45G TkeWohhDeZ2gh8jKdVTXyDx41w2l/LcWls/Wedw1uvXkzKTR8fWplot/kE8di6O/lD PnWKHHyHkrJxwdGlOGtQAdNHK9ih9OIbaRVriGoo= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Alexander Aring , David Teigland Subject: [PATCH 6.4 189/292] fs: dlm: make F_SETLK use unkillable wait_event Date: Fri, 21 Jul 2023 18:04:58 +0200 Message-ID: <20230721160537.013358904@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230721160528.800311148@linuxfoundation.org> References: <20230721160528.800311148@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Alexander Aring commit 0f2b1cb89ccdbdcedf7143f4153a4da700a05f48 upstream. While a non-waiting posix lock request (F_SETLK) is waiting for user space processing (in dlm_controld), wait for that processing to complete with an unkillable wait_event(). This makes F_SETLK behave the same way for F_RDLCK, F_WRLCK and F_UNLCK. F_SETLKW continues to use wait_event_killable(). Cc: stable@vger.kernel.org Signed-off-by: Alexander Aring Signed-off-by: David Teigland Signed-off-by: Greg Kroah-Hartman --- fs/dlm/plock.c | 38 +++++++++++++++++++++----------------- 1 file changed, 21 insertions(+), 17 deletions(-) --- a/fs/dlm/plock.c +++ b/fs/dlm/plock.c @@ -155,25 +155,29 @@ int dlm_posix_lock(dlm_lockspace_t *lock send_op(op); - rv = wait_event_killable(recv_wq, (op->done != 0)); - if (rv == -ERESTARTSYS) { - spin_lock(&ops_lock); - /* recheck under ops_lock if we got a done != 0, - * if so this interrupt case should be ignored - */ - if (op->done != 0) { + if (op->info.wait) { + rv = wait_event_killable(recv_wq, (op->done != 0)); + if (rv == -ERESTARTSYS) { + spin_lock(&ops_lock); + /* recheck under ops_lock if we got a done != 0, + * if so this interrupt case should be ignored + */ + if (op->done != 0) { + spin_unlock(&ops_lock); + goto do_lock_wait; + } + list_del(&op->list); spin_unlock(&ops_lock); - goto do_lock_wait; - } - list_del(&op->list); - spin_unlock(&ops_lock); - log_debug(ls, "%s: wait interrupted %x %llx pid %d", - __func__, ls->ls_global_id, - (unsigned long long)number, op->info.pid); - do_unlock_close(&op->info); - dlm_release_plock_op(op); - goto out; + log_debug(ls, "%s: wait interrupted %x %llx pid %d", + __func__, ls->ls_global_id, + (unsigned long long)number, op->info.pid); + do_unlock_close(&op->info); + dlm_release_plock_op(op); + goto out; + } + } else { + wait_event(recv_wq, (op->done != 0)); } do_lock_wait: