Re: A possible fsnotify bug.

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On Mon, Nov 15, 2010 at 02:15:55AM +0300, Alexey Zaytsev wrote:
> Confirmed, the user is getting duplicate notifications. Looks like
> this has been working this way since the original inotify patch. Is
> this the intended behavior?

I can't think of any reason for the nfsd code to be diong the
notification itself--looks like just a mistake to me.

--b.

> 
> On Sun, Nov 14, 2010 at 08:14, Alexey Zaytsev <alexey.zaytsev@xxxxxxxxx> wrote:
> > Hi.
> >
> > Have not tested, but this code in fs/nfsd/vfs.c looks suspicious:
> > http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=blob;f=fs/nfsd/vfs.c;h=184938fcff04d5dff712b8bee01f5d7e41bb20ad;hb=HEAD#l1032
> >
> > 1032 Â Â Â Â host_err = vfs_writev(file, (struct iovec __user *)vec,
> > vlen, &offset);
> > 1033 Â Â Â Â set_fs(oldfs);
> > 1034 Â Â Â Â if (host_err < 0)
> > 1035 Â Â Â Â Â Â Â Â goto out_nfserr;
> > 1036 Â Â Â Â *cnt = host_err;
> > 1037 Â Â Â Â nfsdstats.io_write += host_err;
> > 1038 Â Â Â Â fsnotify_modify(file);
> >
> > fsnotify_modify() is called from vfs_writev() -> do_readv_writev(),
> > and the users are probably getting duplicate events, right?
> >
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