From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-Id: <20120124023926.039890456@clark.kroah.org> Date: Mon, 23 Jan 2012 18:34:04 -0800 From: Greg KH To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: torvalds@linux-foundation.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, Josef Bacik , Jan Kara , Al Viro , NeilBrown , Trond Myklebust Subject: [024/129] NFS - fix recent breakage to NFS error handling. In-Reply-To: <20120124024041.GA18422@kroah.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.2-stable review patch. If anyone has any objections, please let me know. ------------------ Content-Length: 1795 Lines: 54 From: NeilBrown commit 2edb6bc3852c681c0d948245bd55108dc6407604 upstream. From c6d615d2b97fe305cbf123a8751ced859dca1d5e Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Wed, 16 Nov 2011 09:39:05 +1100 Subject: NFS - fix recent breakage to NFS error handling. commit 02c24a82187d5a628c68edfe71ae60dc135cd178 made a small and presumably unintended change to write error handling in NFS. Previously an error from filemap_write_and_wait_range would only be of interest if nfs_file_fsync did not return an error. After this commit, an error from filemap_write_and_wait_range would mean that (the rest of) nfs_file_fsync would not even be called. This means that: 1/ you are more likely to see EIO than e.g. EDQUOT or ENOSPC. 2/ NFS_CONTEXT_ERROR_WRITE remains set for longer so more writes are synchronous. This patch restores previous behaviour. Cc: Josef Bacik Cc: Jan Kara Cc: Al Viro Signed-off-by: NeilBrown Signed-off-by: Trond Myklebust Signed-off-by: Greg Kroah-Hartman --- fs/nfs/file.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/fs/nfs/file.c +++ b/fs/nfs/file.c @@ -272,13 +272,13 @@ nfs_file_fsync(struct file *file, loff_t datasync); ret = filemap_write_and_wait_range(inode->i_mapping, start, end); - if (ret) - return ret; mutex_lock(&inode->i_mutex); nfs_inc_stats(inode, NFSIOS_VFSFSYNC); have_error = test_and_clear_bit(NFS_CONTEXT_ERROR_WRITE, &ctx->flags); status = nfs_commit_inode(inode, FLUSH_SYNC); + if (status >= 0 && ret < 0) + status = ret; have_error |= test_bit(NFS_CONTEXT_ERROR_WRITE, &ctx->flags); if (have_error) ret = xchg(&ctx->error, 0);