At Mon, 16 Aug 2010 12:09:12 +0200, Takashi Iwai wrote:
> At Mon, 16 Aug 2010 15:06:26 +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.
>
> This hits me, too. Reverting it cures the problem.
> (BTW, the correct commit id of the affecting patch is
> af7fa16506bf9b6323e862a61e14c20555152bb3
> "NFS: Fix up the fsync code")
>
> Reproduced on 2.6.36-rc1.
>
> Looking at strace output,
>
> open("afo", O_WRONLY|O_CREAT|O_TRUNC, 0666) = 4
> write(4, "#!/bin\n", 7) = 7
> fsync(4) = 1
> stat("afo", {st_mode=S_IFREG|0644, st_size=7, ...}) = 0
> close(4) = 0
>
> So, fsync() returns 1 wrongly.
How about a band-aid fix below?
Takashi
>From c75eab5ac47f5ce27a0d450423f8c46824f832f0 Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@xxxxxxx>
Date: Mon, 16 Aug 2010 12:25:19 +0200
Subject: [PATCH] NFS: fix fsync return code
With the commit af7fa16506bf9b6323e862a61e14c20555152bb3
NFS: Fix up the fsync code
fsync returns a postive number for success incorrectly because now it
calls nfs_commit_inode() which returns the number of pages.
This patch makes fsync simply ignore a positive return value.
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
---
fs/nfs/file.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
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;
}
--
1.7.2.1
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