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Currently, __xsk_rcv_zc() is a function that is responsible for producing AF_XDP Rx descriptors. It is used by both copy and zero-copy mode. Both of these modes are going to differ when multi-buffer support is going to be added. ZC will work on a chain of xdp_buff_xsk structs whereas copy-mode is going to utilize skb_shared_info contents. This means that ZC-specific changes would affect the copy mode. Let's modify __xsk_rcv_zc() to work directly on xdp_buff_xsk so the callsites have to retrieve this from xdp_buff. Also, introduce xsk_rcv_zc() which will carry all the needed later changes for supporting multi-buffer on ZC side that do not apply to copy mode. Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com> Link: https://lore.kernel.org/r/20230719132421.584801-4-maciej.fijalkowski@intel.com Signed-off-by: Alexei Starovoitov <ast@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 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.