Re: nfs regression 2.6.35+

[Trond Myklebust <Trond.Myklebust@netapp.com>]

On Mon, 2010-08-16 at 15:06 +0800, Shaohua Li wrote:
> NFS client runs latest git. At client side, use vim to edit a file located at
> NFS server. If I save the file, vim always reports 'E667: Fsync failed'. If I
> revert f7fa16506bf9b6323e862a61e14c20555152bb3, vim works. No kernel errors
> reported.
> 
> Thanks,
> Shaohua
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There is already a fix for this in the linux-next tree and in the
'bugfixes' branch of
git://git.linux-nfs.org/projects/trondmy/nfs-2.6.git: see commit
0702099bd86c33c2dcdbd3963433a61f3f503901 (NFS: fix the return value of
nfs_file_fsync()).

I haven't pushed it to Linus yet due to excessive travel this past week.
Will do so soon.

Cheers
  Trond

----------------------------------------------------------------------------------------
commit 0702099bd86c33c2dcdbd3963433a61f3f503901
Author: J. R. Okajima <hooanon05@yahoo.co.jp>
Date:   Wed Aug 11 13:10:16 2010 -0400

    NFS: fix the return value of nfs_file_fsync()
    
    By the commit af7fa16 2010-08-03 NFS: Fix up the fsync code
    close(2) became returning the non-zero value even if it went well.
    nfs_file_fsync() should return 0 when "status" is positive.
    
    Signed-off-by: J. R. Okajima <hooanon05@yahoo.co.jp>
    Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index 2d141a7..eb51bd6 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -323,7 +323,7 @@ nfs_file_fsync(struct file *file, int datasync)
 	have_error |= test_bit(NFS_CONTEXT_ERROR_WRITE, &ctx->flags);
 	if (have_error)
 		ret = xchg(&ctx->error, 0);
-	if (!ret)
+	if (!ret && status < 0)
 		ret = status;
 	return ret;
 }