selftests: forwarding: Add devlink_lib.sh

This helper library contains wrappers to devlink functionality agnostic
to the underlying device.

Signed-off-by: Yuval Mintz <yuvalm@mellanox.com>
[petrm@mellanox.com: Split this out from another patch.]
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/tools/testing/selftests/net/forwarding/devlink_lib.sh b/tools/testing/selftests/net/forwarding/devlink_lib.sh
new file mode 100644 (file)
index 0000000..5ab1e5f
--- /dev/null
+++ b/tools/testing/selftests/net/forwarding/devlink_lib.sh
@@ -0,0 +1,108 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+
+##############################################################################
+# Source library
+
+relative_path="${BASH_SOURCE%/*}"
+if [[ "$relative_path" == "${BASH_SOURCE}" ]]; then
+       relative_path="."
+fi
+
+source "$relative_path/lib.sh"
+
+##############################################################################
+# Defines
+
+DEVLINK_DEV=$(devlink port show | grep "${NETIFS[p1]}" | \
+             grep -v "${NETIFS[p1]}[0-9]" | cut -d" " -f1 | \
+             rev | cut -d"/" -f2- | rev)
+if [ -z "$DEVLINK_DEV" ]; then
+       echo "SKIP: ${NETIFS[p1]} has no devlink device registered for it"
+       exit 1
+fi
+if [[ "$(echo $DEVLINK_DEV | grep -c pci)" -eq 0 ]]; then
+       echo "SKIP: devlink device's bus is not PCI"
+       exit 1
+fi
+
+DEVLINK_VIDDID=$(lspci -s $(echo $DEVLINK_DEV | cut -d"/" -f2) \
+                -n | cut -d" " -f3)
+
+##############################################################################
+# Sanity checks
+
+devlink -j resource show "$DEVLINK_DEV" &> /dev/null
+if [ $? -ne 0 ]; then
+       echo "SKIP: iproute2 too old, missing devlink resource support"
+       exit 1
+fi
+
+##############################################################################
+# Devlink helpers
+
+devlink_resource_names_to_path()
+{
+       local resource
+       local path=""
+
+       for resource in "${@}"; do
+               if [ "$path" == "" ]; then
+                       path="$resource"
+               else
+                       path="${path}/$resource"
+               fi
+       done
+
+       echo "$path"
+}
+
+devlink_resource_get()
+{
+       local name=$1
+       local resource_name=.[][\"$DEVLINK_DEV\"]
+
+       resource_name="$resource_name | .[] | select (.name == \"$name\")"
+
+       shift
+       for resource in "${@}"; do
+               resource_name="${resource_name} | .[\"resources\"][] | \
+                              select (.name == \"$resource\")"
+       done
+
+       devlink -j resource show "$DEVLINK_DEV" | jq "$resource_name"
+}
+
+devlink_resource_size_get()
+{
+       local size=$(devlink_resource_get "$@" | jq '.["size_new"]')
+
+       if [ "$size" == "null" ]; then
+               devlink_resource_get "$@" | jq '.["size"]'
+       else
+               echo "$size"
+       fi
+}
+
+devlink_resource_size_set()
+{
+       local new_size=$1
+       local path
+
+       shift
+       path=$(devlink_resource_names_to_path "$@")
+       devlink resource set "$DEVLINK_DEV" path "$path" size "$new_size"
+       check_err $? "Failed setting path $path to size $size"
+}
+
+devlink_reload()
+{
+       local still_pending
+
+       devlink dev reload "$DEVLINK_DEV" &> /dev/null
+       check_err $? "Failed reload"
+
+       still_pending=$(devlink resource show "$DEVLINK_DEV" | \
+                       grep -c "size_new")
+       check_err $still_pending "Failed reload - There are still unset sizes"
+}