From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S272473AbTHIRgX (ORCPT ); Sat, 9 Aug 2003 13:36:23 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S272623AbTHIRgX (ORCPT ); Sat, 9 Aug 2003 13:36:23 -0400 Received: from mail.jlokier.co.uk ([81.29.64.88]:43396 "EHLO mail.jlokier.co.uk") by vger.kernel.org with ESMTP id S272473AbTHIRgU (ORCPT ); Sat, 9 Aug 2003 13:36:20 -0400 Date: Sat, 9 Aug 2003 18:35:46 +0100 From: Jamie Lokier To: Linus Torvalds , Neil Brown , Trond Myklebust , Andrew Morton , linux-kernel@vger.kernel.org Subject: [PATCH] Fix protocol bugs with NFS and nanoseconds Message-ID: <20030809173546.GA29917@mail.jlokier.co.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org NFS with 2.5.75 as both client and server is totally broken with GNU Make. Kernel builds fail. The nanosecond field of timestamps of newly touched files is often negative on the client, which is probably why Make fails. The value also bears no relation to the file's nanosecond field on the server. The culprit is htons() used where htonl() should be: - *p++ = htonl((u32) time->tv_sec); *p++ = htons(time->tv_nsec); + *p++ = htonl((u32) time->tv_sec); *p++ = htonl(time->tv_nsec); The rest of this patch corrects nfsd to use microseconds in NFSv2, not nanoseconds. (The client already gets this right, but I have optimised it slightly to avoid division when possible). With this patch, kernel builds work again over NFSv3. The NFSv2 fix is also tested. Please apply. Enjoy, -- Jamie diff -ur orig-2.5.75/fs/nfs/nfs2xdr.c laptop-2.5.75/fs/nfs/nfs2xdr.c --- orig-2.5.75/fs/nfs/nfs2xdr.c 2003-07-08 21:40:56.000000000 +0100 +++ laptop-2.5.75/fs/nfs/nfs2xdr.c 2003-08-09 17:57:08.498827393 +0100 @@ -90,7 +90,7 @@ { *p++ = htonl(timep->tv_sec); /* Convert nanoseconds into microseconds */ - *p++ = htonl(timep->tv_nsec / 1000); + *p++ = htonl(timep->tv_nsec ? timep->tv_nsec / 1000 : 0); return p; } diff -ur orig-2.5.75/fs/nfsd/nfs3xdr.c laptop-2.5.75/fs/nfsd/nfs3xdr.c --- orig-2.5.75/fs/nfsd/nfs3xdr.c 2003-07-08 21:55:24.000000000 +0100 +++ laptop-2.5.75/fs/nfsd/nfs3xdr.c 2003-08-09 17:59:34.416338758 +0100 @@ -4,6 +4,8 @@ * XDR support for nfsd/protocol version 3. * * Copyright (C) 1995, 1996, 1997 Olaf Kirch + * + * 2003-08-09 Jamie Lokier: Use htonl() for nanoseconds, not htons()! */ #include @@ -43,7 +45,7 @@ static inline u32 * encode_time3(u32 *p, struct timespec *time) { - *p++ = htonl((u32) time->tv_sec); *p++ = htons(time->tv_nsec); + *p++ = htonl((u32) time->tv_sec); *p++ = htonl(time->tv_nsec); return p; } diff -ur orig-2.5.75/fs/nfsd/nfsxdr.c laptop-2.5.75/fs/nfsd/nfsxdr.c --- orig-2.5.75/fs/nfsd/nfsxdr.c 2003-07-08 21:54:20.000000000 +0100 +++ laptop-2.5.75/fs/nfsd/nfsxdr.c 2003-08-09 17:57:52.963829023 +0100 @@ -123,13 +123,13 @@ if (tmp != (u32)-1 && tmp1 != (u32)-1) { iap->ia_valid |= ATTR_ATIME | ATTR_ATIME_SET; iap->ia_atime.tv_sec = tmp; - iap->ia_atime.tv_nsec = tmp1; + iap->ia_atime.tv_nsec = tmp1 * 1000; } tmp = ntohl(*p++); tmp1 = ntohl(*p++); if (tmp != (u32)-1 && tmp1 != (u32)-1) { iap->ia_valid |= ATTR_MTIME | ATTR_MTIME_SET; iap->ia_mtime.tv_sec = tmp; - iap->ia_mtime.tv_nsec = tmp1; + iap->ia_mtime.tv_nsec = tmp1 * 1000; } return p; } @@ -171,12 +171,12 @@ *p++ = htonl((u32) stat.dev); *p++ = htonl((u32) stat.ino); *p++ = htonl((u32) stat.atime.tv_sec); - *p++ = htons(stat.atime.tv_nsec); + *p++ = htonl(stat.atime.tv_nsec ? stat.atime.tv_nsec / 1000 : 0); lease_get_mtime(dentry->d_inode, &time); *p++ = htonl((u32) time.tv_sec); - *p++ = htons(time.tv_nsec); + *p++ = htonl(time.tv_nsec ? time.tv_nsec / 1000 : 0); *p++ = htonl((u32) stat.ctime.tv_sec); - *p++ = htons(stat.ctime.tv_nsec); + *p++ = htonl(stat.ctime.tv_nsec ? stat.ctime.tv_nsec / 1000 : 0); return p; }