tools/testing/selftests/net/packetdrill/tcp_zerocopy_basic.pkt

   1 // SPDX-License-Identifier: GPL-2.0
   2 // basic zerocopy test:
   3 //
   4 // send a packet with MSG_ZEROCOPY and receive the notification ID
   5 // repeat and verify IDs are consecutive
   6
   7 `./defaults.sh`
   8
   9     0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3
  10    +0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0
  11    +0 setsockopt(3, SOL_SOCKET, SO_ZEROCOPY, [1], 4) = 0
  12    +0 bind(3, ..., ...) = 0
  13    +0 listen(3, 1) = 0
  14
  15    +0 < S 0:0(0) win 32792 <mss 1000,sackOK,nop,nop,nop,wscale 7>
  16    +0 > S. 0:0(0) ack 1 <mss 1460,nop,nop,sackOK,nop,wscale 8>
  17    +0 < . 1:1(0) ack 1 win 257
  18
  19    +0 accept(3, ..., ...) = 4
  20
  21    +0 send(4, ..., 4000, MSG_ZEROCOPY) = 4000
  22    +0 > P. 1:4001(4000) ack 1
  23    +0 < . 1:1(0) ack 4001 win 257
  24
  25    +0 recvmsg(4, {msg_name(...)=...,
  26                   msg_iov(1)=[{...,0}],
  27                   msg_flags=MSG_ERRQUEUE,
  28                   msg_control=[
  29                         {cmsg_level=CMSG_LEVEL_IP,
  30                          cmsg_type=CMSG_TYPE_RECVERR,
  31                          cmsg_data={ee_errno=0,
  32                                     ee_origin=SO_EE_ORIGIN_ZEROCOPY,
  33                                     ee_type=0,
  34                                     ee_code=SO_EE_CODE_ZEROCOPY_COPIED,
  35                                     ee_info=0,
  36                                     ee_data=0}}
  37                    ]}, MSG_ERRQUEUE) = 0
  38
  39    +0 send(4, ..., 4000, MSG_ZEROCOPY) = 4000
  40    +0 > P. 4001:8001(4000) ack 1
  41    +0 < . 1:1(0) ack 8001 win 257
  42
  43    +0 recvmsg(4, {msg_name(...)=...,
  44                   msg_iov(1)=[{...,0}],
  45                   msg_flags=MSG_ERRQUEUE,
  46                   msg_control=[
  47                         {cmsg_level=CMSG_LEVEL_IP,
  48                          cmsg_type=CMSG_TYPE_RECVERR,
  49                          cmsg_data={ee_errno=0,
  50                                     ee_origin=SO_EE_ORIGIN_ZEROCOPY,
  51                                     ee_type=0,
  52                                     ee_code=SO_EE_CODE_ZEROCOPY_COPIED,
  53                                     ee_info=1,
  54                                     ee_data=1}}
  55                    ]}, MSG_ERRQUEUE) = 0