Re: [PATCH 05/11] fuse: Trust kernel i_mtime only -v2

From: Miklos Szeredi
Date: Mon Jan 06 2014 - 11:23:18 EST

On Thu, Dec 26, 2013 at 07:41:41PM +0400, Maxim Patlasov wrote:
> >>+
> >>+ if (!err)
> >>+ clear_bit(FUSE_I_MTIME_DIRTY, &fi->state);
> >Doing the test and the clear separately opens a huge race window when i_mtime
> >modifications are bound to get lost.
> No. Because the whole operation is protected by i_mutex (see
> fuse_fsync_common()).

fuse_release_common() doesn't have i_mutex. It's probably safe to acquire it,
but is that really needed?

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