dd4bfda9cf
John Fastabend says: ==================== This adds a size field to the sk_msg_md data structure used by SK_MSG programs. Without this in the zerocopy case and in the copy case where multiple iovs are in use its difficult to know how much data can be pulled in. The normal method of reading data and data_end only give the current contiguous buffer. BPF programs can attempt to pull in extra data but have to guess if it exists. This can result in multiple "guesses" its much better if we know upfront the size of the sk_msg. ==================== Acked-by: Martin KaFai Lau <kafai@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
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 Restructured Text 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.