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 5E3FEEB64DC for ; Sun, 9 Jul 2023 11:35:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232969AbjGILfg (ORCPT ); Sun, 9 Jul 2023 07:35:36 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43396 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232966AbjGILfg (ORCPT ); Sun, 9 Jul 2023 07:35:36 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 17E2695 for ; Sun, 9 Jul 2023 04:35:35 -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 AB61060BC9 for ; Sun, 9 Jul 2023 11:35:34 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B85F7C433C8; Sun, 9 Jul 2023 11:35:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1688902534; bh=KvykWeI8iEHKDhBwjfV7Sz98/tWjsPqX4svlOow6Po8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bdvlcJRsHW8kWFn8+zpyTz+0VYezS+aAlDafMMTJXIBQWkG4d9vt+1aNI2N+im2yX 4eDGColSIUm1SY+DVAU33y4rkjEzXb4VvzGLK2FG2hNTZgTg9FoVwc5AYi/CNImK2k cJkfdItOlsmPx3r3fvkZ8l2xU2rVpqEEyIJS9tGk= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Tom Talpey , Bharath SM , Steve French , Sasha Levin Subject: [PATCH 6.3 411/431] SMB3: Do not send lease break acknowledgment if all file handles have been closed Date: Sun, 9 Jul 2023 13:15:59 +0200 Message-ID: <20230709111500.823746661@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230709111451.101012554@linuxfoundation.org> References: <20230709111451.101012554@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: Bharath SM [ Upstream commit da787d5b74983f7525d1eb4b9c0b4aff2821511a ] In case if all existing file handles are deferred handles and if all of them gets closed due to handle lease break then we dont need to send lease break acknowledgment to server, because last handle close will be considered as lease break ack. After closing deferred handels, we check for openfile list of inode, if its empty then we skip sending lease break ack. Fixes: 59a556aebc43 ("SMB3: drop reference to cfile before sending oplock break") Reviewed-by: Tom Talpey Signed-off-by: Bharath SM Signed-off-by: Steve French Signed-off-by: Sasha Levin --- fs/cifs/file.c | 25 ++++++++++++------------- 1 file changed, 12 insertions(+), 13 deletions(-) diff --git a/fs/cifs/file.c b/fs/cifs/file.c index 051283386e229..1a854dc204823 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -4936,20 +4936,19 @@ void cifs_oplock_break(struct work_struct *work) _cifsFileInfo_put(cfile, false /* do not wait for ourself */, false); /* - * releasing stale oplock after recent reconnect of smb session using - * a now incorrect file handle is not a data integrity issue but do - * not bother sending an oplock release if session to server still is - * disconnected since oplock already released by the server + * MS-SMB2 3.2.5.19.1 and 3.2.5.19.2 (and MS-CIFS 3.2.5.42) do not require + * an acknowledgment to be sent when the file has already been closed. + * check for server null, since can race with kill_sb calling tree disconnect. */ - if (!oplock_break_cancelled) { - /* check for server null since can race with kill_sb calling tree disconnect */ - if (tcon->ses && tcon->ses->server) { - rc = tcon->ses->server->ops->oplock_response(tcon, persistent_fid, - volatile_fid, net_fid, cinode); - cifs_dbg(FYI, "Oplock release rc = %d\n", rc); - } else - pr_warn_once("lease break not sent for unmounted share\n"); - } + spin_lock(&cinode->open_file_lock); + if (tcon->ses && tcon->ses->server && !oplock_break_cancelled && + !list_empty(&cinode->openFileList)) { + spin_unlock(&cinode->open_file_lock); + rc = tcon->ses->server->ops->oplock_response(tcon, persistent_fid, + volatile_fid, net_fid, cinode); + cifs_dbg(FYI, "Oplock release rc = %d\n", rc); + } else + spin_unlock(&cinode->open_file_lock); cifs_done_oplock_break(cinode); } -- 2.39.2