netdev - [PATCH bpf-next 0/8] Add a test for SHARED

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Message-Id: <20230918093304.367826-1-tushar.vyavahare@intel.com>
Date: Mon, 18 Sep 2023 15:02:56 +0530
From: Tushar Vyavahare <tushar.vyavahare@...el.com>
To: bpf@...r.kernel.org
Cc: netdev@...r.kernel.org,
	bjorn@...nel.org,
	magnus.karlsson@...el.com,
	maciej.fijalkowski@...el.com,
	jonathan.lemon@...il.com,
	davem@...emloft.net,
	kuba@...nel.org,
	pabeni@...hat.com,
	ast@...nel.org,
	daniel@...earbox.net,
	tirthendu.sarkar@...el.com,
	tushar.vyavahare@...el.com
Subject: [PATCH bpf-next 0/8] Add a test for SHARED_UMEM feature

Implement a test for the SHARED_UMEM feature in this patch set and make
necessary changes/improvements. Ensure that the framework now supports
different streams for different sockets.

Patch series summary:

1: Move the packet stream from the ifobject struct to the xsk_socket_info
   struct to enable the use of different streams for different sockets
   This will facilitate the sending and receiving of data from multiple
   sockets simultaneously using the SHARED_XDP_UMEM feature.

   It gives flexibility of send/recive individual traffic on particular
   socket.

2: Rename the header file to a generic name so that it can be used by all
   future XDP programs.

3: Move the src_mac and dst_mac fields from the ifobject structure to the
   xsk_socket_info structure to achieve per-socket MAC address assignment.
   Implement the function called generate_mac_addresses() to generate MAC
   addresses based on the required number by the framework.

   Require this in order to steer traffic to various sockets in subsequent
   patches.

4: Improve the receive_pkt() function to enable it to receive packets from
   multiple sockets. Define a sock_num variable to iterate through all the
   sockets in the Rx path. Add nb_valid_entries to check that all the
   expected number of packets are received.

5: The pkt_set() function no longer needs the umem parameter. This commit
   removes the umem parameter from the pkt_set() function.

6: Iterate over all the sockets in the send pkts function. Update
   send_pkts() to handle multiple sockets for sending packets.
   Multiple TX sockets are utilized alternately based on the batch size
   for improve packet transmission.

7: Modify xsk_update_xskmap() to accept the index as an argument, enabling
   the addition of multiple sockets to xskmap.

8: Add a new test for testing shared umem feature. This is accomplished by
   adding a new XDP program and using the multiple sockets. The new  XDP
   program redirects the packets based on the destination MAC address.

Tushar Vyavahare (8):
  selftests/xsk: move pkt_stream to the xsk_socket_info
  selftests/xsk: rename xsk_xdp_metadata.h to xsk_xdp_common.h
  selftests/xsk: implement a function that generates MAC addresses
  selftests/xsk: iterate over all the sockets in the receive pkts
    function
  selftests/xsk: remove unnecessary parameter from pkt_set() function
    call
  selftests/xsk: iterate over all the sockets in the send pkts function
  selftests/xsk: modify xsk_update_xskmap() to accept the index as an
    argument.
  selftests/xsk: add a test for shared umem feature

 .../selftests/bpf/progs/xsk_xdp_progs.c       |  22 +-
 tools/testing/selftests/bpf/xsk.c             |   3 +-
 tools/testing/selftests/bpf/xsk.h             |   2 +-
 tools/testing/selftests/bpf/xsk_xdp_common.h  |  12 +
 .../testing/selftests/bpf/xsk_xdp_metadata.h  |   5 -
 tools/testing/selftests/bpf/xskxceiver.c      | 524 +++++++++++-------
 tools/testing/selftests/bpf/xskxceiver.h      |  14 +-
 7 files changed, 376 insertions(+), 206 deletions(-)
 create mode 100644 tools/testing/selftests/bpf/xsk_xdp_common.h
 delete mode 100644 tools/testing/selftests/bpf/xsk_xdp_metadata.h

-- 
2.34.1