netdev - Re: [PATCH v19 bpf-next 00/23] mvneta: introduce XDP multi-buffer support

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Message-ID: <Yad/QE+3gW3u64hc@lore-desk>
Date:   Wed, 1 Dec 2021 14:57:20 +0100
From:   Lorenzo Bianconi <lorenzo.bianconi@...hat.com>
To:     ast@...nel.org, daniel@...earbox.net
Cc:     bpf@...r.kernel.org, netdev@...r.kernel.org, davem@...emloft.net,
        kuba@...nel.org, shayagr@...zon.com, john.fastabend@...il.com,
        dsahern@...nel.org, brouer@...hat.com, echaudro@...hat.com,
        jasowang@...hat.com, alexander.duyck@...il.com, saeed@...nel.org,
        maciej.fijalkowski@...el.com, magnus.karlsson@...el.com,
        tirthendu.sarkar@...el.com, toke@...hat.com, lorenzo@...nel.org
Subject: Re: [PATCH v19 bpf-next 00/23] mvneta: introduce XDP multi-buffer
 support

[...]

@Alexei and @Daniel,

there is a trivial conflict with bpf_loop helper (because the series was not
merged when I posted v19):

commit e6f2dd0f80674e9d5960337b3e9c2a242441b326
Author: Joanne Koong <joannekoong@...com>
Date:   Mon Nov 29 19:06:19 2021 -0800

    bpf: Add bpf_loop helper

Do you want me to post v20 after waiting for some more feedbacks on v19?

Regards,
Lorenzo

> 
> [0] https://netdevconf.info/0x14/session.html?talk-the-path-to-tcp-4k-mtu-and-rx-zerocopy
> [1] https://github.com/xdp-project/xdp-project/blob/master/areas/core/xdp-multi-buffer01-design.org
> [2] https://netdevconf.info/0x14/session.html?tutorial-add-XDP-support-to-a-NIC-driver (XDPmulti-buffers section)
> 
> Eelco Chaudron (3):
>   bpf: add multi-buff support to the bpf_xdp_adjust_tail() API
>   bpf: add multi-buffer support to xdp copy helpers
>   bpf: selftests: update xdp_adjust_tail selftest to include
>     multi-buffer
> 
> Lorenzo Bianconi (19):
>   net: skbuff: add size metadata to skb_shared_info for xdp
>   xdp: introduce flags field in xdp_buff/xdp_frame
>   net: mvneta: update mb bit before passing the xdp buffer to eBPF layer
>   net: mvneta: simplify mvneta_swbm_add_rx_fragment management
>   net: xdp: add xdp_update_skb_shared_info utility routine
>   net: marvell: rely on xdp_update_skb_shared_info utility routine
>   xdp: add multi-buff support to xdp_return_{buff/frame}
>   net: mvneta: add multi buffer support to XDP_TX
>   bpf: introduce BPF_F_XDP_MB flag in prog_flags loading the ebpf
>     program
>   net: mvneta: enable jumbo frames if the loaded XDP program support mb
>   bpf: introduce bpf_xdp_get_buff_len helper
>   bpf: move user_size out of bpf_test_init
>   bpf: introduce multibuff support to bpf_prog_test_run_xdp()
>   bpf: test_run: add xdp_shared_info pointer in bpf_test_finish
>     signature
>   libbpf: Add SEC name for xdp_mb programs
>   net: xdp: introduce bpf_xdp_pointer utility routine
>   bpf: selftests: introduce bpf_xdp_{load,store}_bytes selftest
>   bpf: selftests: add CPUMAP/DEVMAP selftests for xdp multi-buff
>   xdp: disable XDP_REDIRECT for xdp multi-buff
> 
> Toke Hoiland-Jorgensen (1):
>   bpf: generalise tail call map compatibility check
> 
>  drivers/net/ethernet/marvell/mvneta.c         | 204 +++++++++------
>  include/linux/bpf.h                           |  32 ++-
>  include/linux/skbuff.h                        |   1 +
>  include/net/xdp.h                             | 108 +++++++-
>  include/uapi/linux/bpf.h                      |  30 +++
>  kernel/bpf/arraymap.c                         |   4 +-
>  kernel/bpf/core.c                             |  28 +-
>  kernel/bpf/cpumap.c                           |   8 +-
>  kernel/bpf/devmap.c                           |   3 +-
>  kernel/bpf/syscall.c                          |  25 +-
>  kernel/trace/bpf_trace.c                      |   3 +
>  net/bpf/test_run.c                            | 115 ++++++--
>  net/core/filter.c                             | 246 +++++++++++++++++-
>  net/core/xdp.c                                |  78 +++++-
>  tools/include/uapi/linux/bpf.h                |  30 +++
>  tools/lib/bpf/libbpf.c                        |   8 +
>  .../bpf/prog_tests/xdp_adjust_frags.c         |  96 +++++++
>  .../bpf/prog_tests/xdp_adjust_tail.c          | 118 +++++++++
>  .../selftests/bpf/prog_tests/xdp_bpf2bpf.c    | 151 ++++++++---
>  .../bpf/prog_tests/xdp_cpumap_attach.c        |  65 ++++-
>  .../bpf/prog_tests/xdp_devmap_attach.c        |  56 ++++
>  .../bpf/progs/test_xdp_adjust_tail_grow.c     |  10 +-
>  .../bpf/progs/test_xdp_adjust_tail_shrink.c   |  32 ++-
>  .../selftests/bpf/progs/test_xdp_bpf2bpf.c    |   2 +-
>  .../bpf/progs/test_xdp_update_frags.c         |  42 +++
>  .../bpf/progs/test_xdp_with_cpumap_helpers.c  |   6 +
>  .../progs/test_xdp_with_cpumap_mb_helpers.c   |  27 ++
>  .../bpf/progs/test_xdp_with_devmap_helpers.c  |   7 +
>  .../progs/test_xdp_with_devmap_mb_helpers.c   |  27 ++
>  29 files changed, 1350 insertions(+), 212 deletions(-)
>  create mode 100644 tools/testing/selftests/bpf/prog_tests/xdp_adjust_frags.c
>  create mode 100644 tools/testing/selftests/bpf/progs/test_xdp_update_frags.c
>  create mode 100644 tools/testing/selftests/bpf/progs/test_xdp_with_cpumap_mb_helpers.c
>  create mode 100644 tools/testing/selftests/bpf/progs/test_xdp_with_devmap_mb_helpers.c
> 
> -- 
> 2.31.1
> 

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