Messages in this thread |  | | From | Miklos Szeredi <> | Date | Mon, 15 Jun 2020 10:24:42 +0200 | Subject | Re: [PATCH v4 1/2] hugetlb: use f_mode & FMODE_HUGETLBFS to identify hugetlbfs files |
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On Sat, Jun 13, 2020 at 8:53 AM Amir Goldstein <amir73il@gmail.com> wrote:
> > I also looked at normal filesystem lower and hugetlbfs upper. Yes, overlayfs > > allows this. This is somewhat 'interesting' as write() is not supported in > > hugetlbfs. Writing to files in the overlay actually ended up writing to > > files in the lower filesystem. That seems wrong, but overlayfs is new to me.
Yes, this very definitely should not happen.
> I am not sure how that happened, but I think that ovl_open_realfile() > needs to fixup f_mode flags FMODE_CAN_WRITE | FMODE_CAN_READ > after open_with_fake_path().
Okay, but how did the write actually get to the lower layer?
I failed to reproduce this. Mike, how did you trigger this?
Thanks, Miklos
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