From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757864Ab2KVVgP (ORCPT ); Thu, 22 Nov 2012 16:36:15 -0500 Received: from mail.kernel.org ([198.145.19.201]:49621 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755119Ab2KVSka (ORCPT ); Thu, 22 Nov 2012 13:40:30 -0500 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Greg Kroah-Hartman , alan@lxorguk.ukuu.org.uk, Alex Elder , Sage Weil Subject: [ 123/171] libceph: dont use bio_iter as a flag Date: Wed, 21 Nov 2012 16:41:09 -0800 Message-Id: <20121122004045.692645550@linuxfoundation.org> X-Mailer: git-send-email 1.8.0.197.g5a90748 In-Reply-To: <20121122004033.298367941@linuxfoundation.org> References: <20121122004033.298367941@linuxfoundation.org> User-Agent: quilt/0.60-2.1.2 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Alex Elder (cherry picked from commit abdaa6a849af1d63153682c11f5bbb22dacb1f6b) Recently a bug was fixed in which the bio_iter field in a ceph message was not being properly re-initialized when a message got re-transmitted: commit 43643528cce60ca184fe8197efa8e8da7c89a037 Author: Yan, Zheng rbd: Clear ceph_msg->bio_iter for retransmitted message We are now only initializing the bio_iter field when we are about to start to write message data (in prepare_write_message_data()), rather than every time we are attempting to write any portion of the message data (in write_partial_msg_pages()). This means we no longer need to use the msg->bio_iter field as a flag. So just don't do that any more. Trust prepare_write_message_data() to ensure msg->bio_iter is properly initialized, every time we are about to begin writing (or re-writing) a message's bio data. Signed-off-by: Alex Elder Reviewed-by: Sage Weil Signed-off-by: Greg Kroah-Hartman --- net/ceph/messenger.c | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) --- a/net/ceph/messenger.c +++ b/net/ceph/messenger.c @@ -604,7 +604,7 @@ static void prepare_write_message_data(s else con->out_msg_pos.page_pos = 0; #ifdef CONFIG_BLOCK - if (msg->bio && !msg->bio_iter) + if (msg->bio) init_bio_iter(msg->bio, &msg->bio_iter, &msg->bio_seg); #endif con->out_msg_pos.data_pos = 0; @@ -672,10 +672,6 @@ static void prepare_write_message(struct m->hdr.seq = cpu_to_le64(++con->out_seq); m->needs_out_seq = false; } -#ifdef CONFIG_BLOCK - else - m->bio_iter = NULL; -#endif dout("prepare_write_message %p seq %lld type %d len %d+%d+%d %d pgs\n", m, con->out_seq, le16_to_cpu(m->hdr.type),