linux-kernel - [PATCH bpf-next v2 0/3] xdpsock: allow mmap2 usage for 32bits

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Date:   Thu, 15 Aug 2019 15:13:53 +0300
From:   Ivan Khoronzhuk <ivan.khoronzhuk@...aro.org>
To:     magnus.karlsson@...el.com, bjorn.topel@...el.com
Cc:     davem@...emloft.net, hawk@...nel.org, john.fastabend@...il.com,
        jakub.kicinski@...ronome.com, daniel@...earbox.net,
        netdev@...r.kernel.org, bpf@...r.kernel.org,
        xdp-newbies@...r.kernel.org, linux-kernel@...r.kernel.org,
        jlemon@...gsvamp.com, yhs@...com, andrii.nakryiko@...il.com,
        Ivan Khoronzhuk <ivan.khoronzhuk@...aro.org>
Subject: [PATCH bpf-next v2 0/3] xdpsock: allow mmap2 usage for 32bits

This patchset contains several improvements for af_xdp socket umem
mappings for 32bit systems. Also, there is one more patch outside of
this series that on linux-next tree and related to mmap2 af_xdp umem
offsets: "mm: mmap: increase sockets maximum memory size pgoff for 32bits"
https://lkml.org/lkml/2019/8/12/549

Based on bpf-next/master

Prev: https://lkml.org/lkml/2019/8/13/437

v2..v1:
	- replaced "libbpf: add asm/unistd.h to xsk to get __NR_mmap2" on
	 "libbpf: use LFS (_FILE_OFFSET_BITS) instead of direct mmap2
	 syscall"
	- use vmap along with page_address to avoid overkill
	- define mmap syscall trace5 for mmap if defined

Ivan Khoronzhuk (3):
  libbpf: use LFS (_FILE_OFFSET_BITS) instead of direct mmap2 syscall
  xdp: xdp_umem: replace kmap on vmap for umem map
  samples: bpf: syscal_nrs: use mmap2 if defined

 net/xdp/xdp_umem.c         | 36 +++++++++++++++++++++++-----
 samples/bpf/syscall_nrs.c  |  6 +++++
 samples/bpf/tracex5_kern.c | 13 ++++++++++
 tools/lib/bpf/Makefile     |  1 +
 tools/lib/bpf/xsk.c        | 49 +++++++++++---------------------------
 5 files changed, 64 insertions(+), 41 deletions(-)

-- 
2.17.1