tools/testing/selftests/net/forwarding/devlink_lib.sh

   1 #!/bin/bash
   2 # SPDX-License-Identifier: GPL-2.0
   3
   4 ##############################################################################
   5 # Defines
   6
   7 DEVLINK_DEV=$(devlink port show "${NETIFS[p1]}" -j \
   8                      | jq -r '.port | keys[]' | cut -d/ -f-2)
   9 if [ -z "$DEVLINK_DEV" ]; then
  10         echo "SKIP: ${NETIFS[p1]} has no devlink device registered for it"
  11         exit 1
  12 fi
  13 if [[ "$(echo $DEVLINK_DEV | grep -c pci)" -eq 0 ]]; then
  14         echo "SKIP: devlink device's bus is not PCI"
  15         exit 1
  16 fi
  17
  18 DEVLINK_VIDDID=$(lspci -s $(echo $DEVLINK_DEV | cut -d"/" -f2) \
  19                  -n | cut -d" " -f3)
  20
  21 ##############################################################################
  22 # Sanity checks
  23
  24 devlink help 2>&1 | grep resource &> /dev/null
  25 if [ $? -ne 0 ]; then
  26         echo "SKIP: iproute2 too old, missing devlink resource support"
  27         exit 1
  28 fi
  29
  30 ##############################################################################
  31 # Devlink helpers
  32
  33 devlink_resource_names_to_path()
  34 {
  35         local resource
  36         local path=""
  37
  38         for resource in "${@}"; do
  39                 if [ "$path" == "" ]; then
  40                         path="$resource"
  41                 else
  42                         path="${path}/$resource"
  43                 fi
  44         done
  45
  46         echo "$path"
  47 }
  48
  49 devlink_resource_get()
  50 {
  51         local name=$1
  52         local resource_name=.[][\"$DEVLINK_DEV\"]
  53
  54         resource_name="$resource_name | .[] | select (.name == \"$name\")"
  55
  56         shift
  57         for resource in "${@}"; do
  58                 resource_name="${resource_name} | .[\"resources\"][] | \
  59                                select (.name == \"$resource\")"
  60         done
  61
  62         devlink -j resource show "$DEVLINK_DEV" | jq "$resource_name"
  63 }
  64
  65 devlink_resource_size_get()
  66 {
  67         local size=$(devlink_resource_get "$@" | jq '.["size_new"]')
  68
  69         if [ "$size" == "null" ]; then
  70                 devlink_resource_get "$@" | jq '.["size"]'
  71         else
  72                 echo "$size"
  73         fi
  74 }
  75
  76 devlink_resource_size_set()
  77 {
  78         local new_size=$1
  79         local path
  80
  81         shift
  82         path=$(devlink_resource_names_to_path "$@")
  83         devlink resource set "$DEVLINK_DEV" path "$path" size "$new_size"
  84         check_err $? "Failed setting path $path to size $size"
  85 }
  86
  87 devlink_reload()
  88 {
  89         local still_pending
  90
  91         devlink dev reload "$DEVLINK_DEV" &> /dev/null
  92         check_err $? "Failed reload"
  93
  94         still_pending=$(devlink resource show "$DEVLINK_DEV" | \
  95                         grep -c "size_new")
  96         check_err $still_pending "Failed reload - There are still unset sizes"
  97 }