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Re: [PATCH 0/7] overlayfs: fix ro/rw fd data inconsistecies

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On Thu, Nov 24, 2016 at 11:55 AM, Miklos Szeredi <mszeredi@redhat.com> wrote:
> A file is opened for read-only, opened read-write (resulting in a copy up)
> and modified.  The data read back from the the read-only fd will be stale
> in this case (the read-only file descriptor still refers to the lower,
> unmodified file).
>
> This patchset fixes issues related to this corner case.
>
> The VFS impact is minimal and performance in the non-corner cases shouldn't
> suffer.

Git tree is here:

git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs.git #overlayfs-rorw

Thanks,
Miklos

> ---
> Miklos Szeredi (7):
>   vfs: allow overlayfs to intercept file ops
>   vfs: export filp_clone_open()
>   mm: ovl: copy-up on MAP_SHARED
>   ovl: add infrastructure for intercepting file ops
>   ovl: intercept read_iter
>   ovl: intercept mmap
>   ovl: intercept fsync
>
>  fs/internal.h            |   1 -
>  fs/open.c                |   2 +-
>  fs/overlayfs/inode.c     | 225 +++++++++++++++++++++++++++++++++++++++++++++++
>  fs/overlayfs/overlayfs.h |   2 +
>  fs/overlayfs/super.c     |   1 +
>  include/linux/fs.h       |   1 +
>  mm/util.c                |  22 +++++
>  7 files changed, 252 insertions(+), 2 deletions(-)
>
> --
> 2.5.5
>

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[PATCH 0/7] overlayfs: fix ro/rw fd data inconsistecies Miklos Szeredi <mszeredi@redhat.com> - 2016-11-24 12:00 +0100
  [PATCH 0/7] overlayfs: fix ro/rw fd data inconsistecies Miklos Szeredi <mszeredi@redhat.com> - 2016-11-24 12:00 +0100
    Re: [PATCH 0/7] overlayfs: fix ro/rw fd data inconsistecies Miklos Szeredi <miklos@szeredi.hu> - 2016-11-24 15:20 +0100
      Re: [PATCH 0/7] overlayfs: fix ro/rw fd data inconsistecies Amir Goldstein <amir73il@gmail.com> - 2016-11-24 22:00 +0100
  [PATCH 3/7] mm: ovl: copy-up on MAP_SHARED Miklos Szeredi <mszeredi@redhat.com> - 2016-11-24 12:00 +0100
  [PATCH 4/7] ovl: add infrastructure for intercepting file ops Miklos Szeredi <mszeredi@redhat.com> - 2016-11-24 12:00 +0100
    Re: [PATCH 4/7] ovl: add infrastructure for intercepting file ops Amir Goldstein <amir73il@gmail.com> - 2016-11-24 13:00 +0100
      Re: [PATCH 4/7] ovl: add infrastructure for intercepting file ops Miklos Szeredi <miklos@szeredi.hu> - 2016-11-24 13:10 +0100
        Re: [PATCH 4/7] ovl: add infrastructure for intercepting file ops Amir Goldstein <amir73il@gmail.com> - 2016-11-24 14:20 +0100
          Re: [PATCH 4/7] ovl: add infrastructure for intercepting file ops Miklos Szeredi <miklos@szeredi.hu> - 2016-11-24 15:00 +0100
            Re: [PATCH 4/7] ovl: add infrastructure for intercepting file ops Amir Goldstein <amir73il@gmail.com> - 2016-11-24 15:10 +0100
              Re: [PATCH 4/7] ovl: add infrastructure for intercepting file ops Amir Goldstein <amir73il@gmail.com> - 2016-11-25 06:30 +0100
  [PATCH 5/7] ovl: intercept read_iter Miklos Szeredi <mszeredi@redhat.com> - 2016-11-24 12:00 +0100
  [PATCH 1/7] vfs: allow overlayfs to intercept file ops Miklos Szeredi <mszeredi@redhat.com> - 2016-11-24 12:00 +0100
  [PATCH 6/7] ovl: intercept mmap Miklos Szeredi <mszeredi@redhat.com> - 2016-11-24 12:10 +0100
    Re: [PATCH 6/7] ovl: intercept mmap Amir Goldstein <amir73il@gmail.com> - 2016-11-24 14:30 +0100
      Re: [PATCH 6/7] ovl: intercept mmap Amir Goldstein <amir73il@gmail.com> - 2016-11-24 19:10 +0100
        Re: [PATCH 6/7] ovl: intercept mmap Amir Goldstein <amir73il@gmail.com> - 2016-11-24 20:10 +0100
  [PATCH 2/7] vfs: export filp_clone_open() Miklos Szeredi <mszeredi@redhat.com> - 2016-11-24 12:10 +0100
  [PATCH 7/7] ovl: intercept fsync Miklos Szeredi <mszeredi@redhat.com> - 2016-11-24 12:10 +0100

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