Re: [PATCH] Fix overlayfs inotify interaction

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Ping.

2016-06-30 14:04 GMT+03:00 Andrey Jr. Melnikov <temnota.am@xxxxxxxxx>:
>  Fix overlayfs inotify interaction - use d_real_inode() helper
>  to resolve real (underlying) inode. Without this inotify is not functional on
>  overlayfs.
>
> Signed-off-by: Andrey Jr. Melnikov <temnota.am@xxxxxxxxx>
>
> ---
> Runtime tested with inotifywait in monitor mode to confirm event generation.
>
> cd /tmp/ && mkdir dest upper lower work
> mount -t overlay none dest -o upperdir=upper/,lowerdir=lower/,workdir=work/
> while /bin/true; do echo test >>/tmp/dest/lower-data; sleep 5; done &
> inotifywait -m /tmp/dest/lower-data
>
>  fs/notify/inotify/inotify_user.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/fs/notify/inotify/inotify_user.c b/fs/notify/inotify/inotify_user.c
> index b8d08d0..592ce16 100644
> --- a/fs/notify/inotify/inotify_user.c
> +++ b/fs/notify/inotify/inotify_user.c
> @@ -742,7 +742,7 @@ SYSCALL_DEFINE3(inotify_add_watch, int, fd, const char __user *, pathname,
>                 goto fput_and_out;
>
>         /* inode held in place by reference to path; group by fget on fd */
> -       inode = path.dentry->d_inode;
> +       inode = d_real_inode(path.dentry);
>         group = f.file->private_data;
>
>         /* create/update an inode mark */
> --
> 2.8.1
>
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