deps: bump cgroups to v0.0.3, fix tests

For changelog, see https://github.com/opencontainers/cgroups/releases/tag/v0.0.3

This fixes two runc issues:

1. JSON incompatibility introduced in cgroups v0.0.2 (see
   opencontainers/cgroups#22).

2. Bad CPU shares to CPU weight conversion (see
   opencontainers#4772).

Due to item 2, modify some tests accordingly.

Signed-off-by: Kir Kolyshkin <[email protected]>

Author: kolyshkin

go.mod

@@ -14,7 +14,7 @@ require (
 	github.com/moby/sys/user v0.3.0
 	github.com/moby/sys/userns v0.1.0
 	github.com/mrunalp/fileutils v0.5.1
-	github.com/opencontainers/cgroups v0.0.1
+	github.com/opencontainers/cgroups v0.0.3
 	github.com/opencontainers/runtime-spec v1.2.1
 	github.com/opencontainers/selinux v1.11.1
 	github.com/seccomp/libseccomp-golang v0.10.0

go.sum

@@ -49,8 +49,8 @@ github.com/moby/sys/userns v0.1.0 h1:tVLXkFOxVu9A64/yh59slHVv9ahO9UIev4JZusOLG/g
 github.com/moby/sys/userns v0.1.0/go.mod h1:IHUYgu/kao6N8YZlp9Cf444ySSvCmDlmzUcYfDHOl28=
 github.com/mrunalp/fileutils v0.5.1 h1:F+S7ZlNKnrwHfSwdlgNSkKo67ReVf8o9fel6C3dkm/Q=
 github.com/mrunalp/fileutils v0.5.1/go.mod h1:M1WthSahJixYnrXQl/DFQuteStB1weuxD2QJNHXfbSQ=
-github.com/opencontainers/cgroups v0.0.1 h1:MXjMkkFpKv6kpuirUa4USFBas573sSAY082B4CiHEVA=
-github.com/opencontainers/cgroups v0.0.1/go.mod h1:s8lktyhlGUqM7OSRL5P7eAW6Wb+kWPNvt4qvVfzA5vs=
+github.com/opencontainers/cgroups v0.0.3 h1:Jc9dWh/0YLGjdy6J/9Ln8NM5BfTA4W2BY0GMozy3aDU=
+github.com/opencontainers/cgroups v0.0.3/go.mod h1:s8lktyhlGUqM7OSRL5P7eAW6Wb+kWPNvt4qvVfzA5vs=
 github.com/opencontainers/runtime-spec v1.2.1 h1:S4k4ryNgEpxW1dzyqffOmhI1BHYcjzU8lpJfSlR0xww=
 github.com/opencontainers/runtime-spec v1.2.1/go.mod h1:jwyrGlmzljRJv/Fgzds9SsS/C5hL+LL3ko9hs6T5lQ0=
 github.com/opencontainers/selinux v1.11.1 h1:nHFvthhM0qY8/m+vfhJylliSshm8G1jJ2jDMcgULaH8=

tests/integration/helpers.bash

@@ -344,7 +344,18 @@ function check_cpu_shares() {
 	local shares=$1
 
 	if [ -v CGROUP_V2 ]; then
-		local weight=$((1 + ((shares - 2) * 9999) / 262142))
+		# Same formula as ConvertCPUSharesToCgroupV2Value.
+		local weight
+		weight=$(awk -v shares="$shares" '
+		BEGIN {
+			if (shares == 0) { print 0; exit }
+			if (shares <= 2) { print 1; exit }
+			if (shares >= 262144) { print 10000; exit }
+			l = log(shares) / log(2)
+			exponent = (l*l + 125*l) / 612.0 - 7.0/34.0
+			print int(exp(exponent * log(10)) + 0.99)
+		}')
+
 		check_cpu_weight "$weight"
 	else
 		check_cgroup_value "cpu.shares" "$shares"

tests/integration/update.bats

@@ -545,10 +545,9 @@ EOF
 	runc run -d --console-socket "$CONSOLE_SOCKET" test_update
 	[ "$status" -eq 0 ]
 
-	# check that initial values were properly set
+	# Check that initial values (from setup) were properly set.
 	check_cpu_quota 500000 1000000 "500ms"
-	# initial cpu shares of 100 corresponds to weight of 4
-	check_cpu_weight 4
+	check_cpu_shares 100
 	check_systemd_value "TasksMax" 20
 
 	runc update -r - test_update <<EOF