tools/testing/selftests/net/io_uring_zerocopy_tx.sh

   1 #!/bin/bash
   2 #
   3 # Send data between two processes across namespaces
   4 # Run twice: once without and once with zerocopy
   5
   6 set -e
   7
   8 readonly DEV="veth0"
   9 readonly DEV_MTU=65535
  10 readonly BIN_TX="./io_uring_zerocopy_tx"
  11 readonly BIN_RX="./msg_zerocopy"
  12
  13 readonly RAND="$(mktemp -u XXXXXX)"
  14 readonly NSPREFIX="ns-${RAND}"
  15 readonly NS1="${NSPREFIX}1"
  16 readonly NS2="${NSPREFIX}2"
  17
  18 readonly SADDR4='192.168.1.1'
  19 readonly DADDR4='192.168.1.2'
  20 readonly SADDR6='fd::1'
  21 readonly DADDR6='fd::2'
  22
  23 readonly path_sysctl_mem="net.core.optmem_max"
  24
  25 # No arguments: automated test
  26 if [[ "$#" -eq "0" ]]; then
  27         IPs=( "4" "6" )
  28
  29         for IP in "${IPs[@]}"; do
  30                 for mode in $(seq 1 3); do
  31                         $0 "$IP" udp -m "$mode" -t 1 -n 32
  32                         $0 "$IP" tcp -m "$mode" -t 1 -n 1
  33                 done
  34         done
  35
  36         echo "OK. All tests passed"
  37         exit 0
  38 fi
  39
  40 # Argument parsing
  41 if [[ "$#" -lt "2" ]]; then
  42         echo "Usage: $0 [4|6] [tcp|udp|raw|raw_hdrincl|packet|packet_dgram] <args>"
  43         exit 1
  44 fi
  45
  46 readonly IP="$1"
  47 shift
  48 readonly TXMODE="$1"
  49 shift
  50 readonly EXTRA_ARGS="$@"
  51
  52 # Argument parsing: configure addresses
  53 if [[ "${IP}" == "4" ]]; then
  54         readonly SADDR="${SADDR4}"
  55         readonly DADDR="${DADDR4}"
  56 elif [[ "${IP}" == "6" ]]; then
  57         readonly SADDR="${SADDR6}"
  58         readonly DADDR="${DADDR6}"
  59 else
  60         echo "Invalid IP version ${IP}"
  61         exit 1
  62 fi
  63
  64 # Argument parsing: select receive mode
  65 #
  66 # This differs from send mode for
  67 # - packet:     use raw recv, because packet receives skb clones
  68 # - raw_hdrinc: use raw recv, because hdrincl is a tx-only option
  69 case "${TXMODE}" in
  70 'packet' | 'packet_dgram' | 'raw_hdrincl')
  71         RXMODE='raw'
  72         ;;
  73 *)
  74         RXMODE="${TXMODE}"
  75         ;;
  76 esac
  77
  78 # Start of state changes: install cleanup handler
  79
  80 cleanup() {
  81         ip netns del "${NS2}"
  82         ip netns del "${NS1}"
  83 }
  84
  85 trap cleanup EXIT
  86
  87 # Create virtual ethernet pair between network namespaces
  88 ip netns add "${NS1}"
  89 ip netns add "${NS2}"
  90
  91 # Configure system settings
  92 ip netns exec "${NS1}" sysctl -w -q "${path_sysctl_mem}=1000000"
  93 ip netns exec "${NS2}" sysctl -w -q "${path_sysctl_mem}=1000000"
  94
  95 ip link add "${DEV}" mtu "${DEV_MTU}" netns "${NS1}" type veth \
  96   peer name "${DEV}" mtu "${DEV_MTU}" netns "${NS2}"
  97
  98 # Bring the devices up
  99 ip -netns "${NS1}" link set "${DEV}" up
 100 ip -netns "${NS2}" link set "${DEV}" up
 101
 102 # Set fixed MAC addresses on the devices
 103 ip -netns "${NS1}" link set dev "${DEV}" address 02:02:02:02:02:02
 104 ip -netns "${NS2}" link set dev "${DEV}" address 06:06:06:06:06:06
 105
 106 # Add fixed IP addresses to the devices
 107 ip -netns "${NS1}" addr add 192.168.1.1/24 dev "${DEV}"
 108 ip -netns "${NS2}" addr add 192.168.1.2/24 dev "${DEV}"
 109 ip -netns "${NS1}" addr add       fd::1/64 dev "${DEV}" nodad
 110 ip -netns "${NS2}" addr add       fd::2/64 dev "${DEV}" nodad
 111
 112 # Optionally disable sg or csum offload to test edge cases
 113 # ip netns exec "${NS1}" ethtool -K "${DEV}" sg off
 114
 115 do_test() {
 116         local readonly ARGS="$1"
 117
 118         echo "ipv${IP} ${TXMODE} ${ARGS}"
 119         ip netns exec "${NS2}" "${BIN_RX}" "-${IP}" -t 2 -C 2 -S "${SADDR}" -D "${DADDR}" -r "${RXMODE}" &
 120         sleep 0.2
 121         ip netns exec "${NS1}" "${BIN_TX}" "-${IP}" -t 1 -D "${DADDR}" ${ARGS} "${TXMODE}"
 122         wait
 123 }
 124
 125 do_test "${EXTRA_ARGS}"
 126 echo ok