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When all layers are on the same underlying filesystem, let stat(2) return st_dev/st_ino values of the copy up origin inode if it is known. This results in constant st_ino/st_dev representation of files in an overlay mount before and after copy up. When the underlying filesystem support NFS exportfs, the result is also persistent st_ino/st_dev representation before and after mount cycle. Lower hardlinks are broken on copy up to different upper files, so we cannot use the lower origin st_ino for those different files, even for the same fs case. When all overlay layers are on the same fs, use overlay st_dev for non-dirs to get the correct result from du -x. Signed-off-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> |
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.