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David Disseldorp
7c1f14f6e8
The existing cpio extraction logic reads (maximum PATH_MAX) name_len bytes from the archive into the collected name buffer and ensures that the trailing byte is a null-terminator. This allows the actual file name to be shorter than name_len, with the name string simply zero-terminated prior to the last byte. Initramfs generators, such as dracut-cpio[1], can take advantage of name zero-padding to align file data segments within the archive to filesystem block boundaries. Block boundary alignment may allow the copy_file_range syscall to reflink archive source and destination extents. Link: https://github.com/dracutdevs/dracut/commit/300e4b116c624bca1b9e7251708b1ae656fe9157 [1] Signed-off-by: David Disseldorp <ddiss@suse.de> Reviewed-by: Nicolas Schier <nsc@kernel.org> Link: https://lore.kernel.org/r/20250819032607.28727-7-ddiss@suse.de Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
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.