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Martin KaFai Lau says: ==================== bpf: xdp: Report bpf_prog ID in IFLA_XDP This is the first usage of the new bpf_prog ID. It is for reporting the ID of a xdp_prog through netlink. It rides on the existing IFLA_XDP. This patch adds IFLA_XDP_PROG_ID for the bpf_prog ID reporting. It starts with changing the generic_xdp first. After that, the hardware driver is changed one by one. Jakub Kicinski mentioned that he will soon introduce XDP_ATTACHED_HW (on top of the existing XDP_ATTACHED_DRV and XDP_ATTACHED_SKB) and he is going to reuse the prog_attached for this purpose. Hence, this patch set keeps the prog_attached even though !!prog_id also implies there is xdp_prog attached. I have tested with generic_xdp, mlx4 and mlx5. v3: 1. Replace 'if' by '?' when checking the xdp_prog pointer as suggested by Jakub Kicinski (thanks!) v2: 1. Remove READ_ONCE since it is alredy under rtnl lock 2. Keep prog_attached in 'struct netdev_xdp' as requested by Jakub Kicinski. The existing prog_attached and the new prog_id are put under a struct for XDP_QUERY_PROG. ==================== Signed-off-by: David S. Miller <davem@davemloft.net> |
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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.