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Merge pull request #2227 from fasaxc/v3.13-gc-maps
[v3.13] Clean up jump maps
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,125 @@ | ||
| // Copyright (c) 2020 Tigera, Inc. All rights reserved. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
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| package ut | ||
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| import ( | ||
| "net" | ||
| "os" | ||
| "path/filepath" | ||
| "strings" | ||
| "testing" | ||
|
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| . "github.com/onsi/gomega" | ||
| log "github.com/sirupsen/logrus" | ||
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| "github.com/projectcalico/felix/bpf" | ||
| "github.com/projectcalico/felix/bpf/tc" | ||
| ) | ||
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| func TestJumpMapCleanup(t *testing.T) { | ||
| RegisterTestingT(t) | ||
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| bpffs, err := bpf.MaybeMountBPFfs() | ||
| Expect(err).NotTo(HaveOccurred()) | ||
| Expect(bpffs).To(Equal("/sys/fs/bpf")) | ||
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| secName := tc.SectionName(tc.EpTypeWorkload, tc.ToEp) | ||
| prog := tc.ProgFilename(tc.EpTypeWorkload, tc.ToEp, false, true, true, "DEBUG") | ||
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| t.Run(prog, func(t *testing.T) { | ||
| RegisterTestingT(t) | ||
| log.Debugf("Testing %v in %v", secName, prog) | ||
|
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| vethName, veth := createVeth() | ||
| defer deleteLink(veth) | ||
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| tc.EnsureQdisc(vethName) | ||
| ap := tc.AttachPoint{ | ||
| Section: secName, | ||
| Hook: tc.HookIngress, | ||
| Iface: vethName, | ||
| Filename: prog, | ||
| } | ||
|
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| // Start with a clean base state in case another test left something behind. | ||
| t.Log("Doing initial clean up") | ||
| tc.CleanUpJumpMaps() | ||
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| t.Log("Adding program, should add one dir and one map.") | ||
| startingJumpMaps := countJumpMaps() | ||
| startingTCDirs := countTCDirs() | ||
| err := tc.AttachProgram(ap, net.ParseIP("10.0.0.1")) | ||
| Expect(err).NotTo(HaveOccurred()) | ||
| Expect(countJumpMaps()).To(BeNumerically("==", startingJumpMaps+1), "unexpected number of jump maps") | ||
| Expect(countTCDirs()).To(BeNumerically("==", startingTCDirs+1), "unexpected number of TC dirs") | ||
|
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| t.Log("Replacing program should add another map and dir.") | ||
| tc.EnsureQdisc(vethName) | ||
| err = tc.AttachProgram(ap, net.ParseIP("10.0.0.2")) | ||
| Expect(err).NotTo(HaveOccurred()) | ||
| Expect(countJumpMaps()).To(BeNumerically("==", startingJumpMaps+2), "unexpected number of jump maps after replacing program") | ||
| Expect(countTCDirs()).To(BeNumerically("==", startingTCDirs+2), "unexpected number of TC dirs after replacing program") | ||
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| t.Log("Cleaning up, should remove the first map.") | ||
| tc.CleanUpJumpMaps() | ||
| Expect(countJumpMaps()).To(BeNumerically("==", startingJumpMaps+1), "unexpected number of jump maps after clean up") | ||
| Expect(countTCDirs()).To(BeNumerically("==", startingTCDirs+1), "unexpected number of TC dirs after clean up") | ||
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| // Remove the program. | ||
| t.Log("Removing all programs and cleaning up, should return to base state.") | ||
| tc.EnsureQdisc(vethName) | ||
| tc.CleanUpJumpMaps() | ||
| Expect(countJumpMaps()).To(BeNumerically("==", startingJumpMaps), "unexpected number of jump maps") | ||
| Expect(countTCDirs()).To(BeNumerically("==", startingTCDirs), "unexpected number of TC dirs") | ||
| }) | ||
| } | ||
|
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| func countJumpMaps() int { | ||
| var count int | ||
| err := filepath.Walk("/sys/fs/bpf/tc", func(p string, info os.FileInfo, err error) error { | ||
| if err != nil { | ||
| return err | ||
| } | ||
| if strings.HasPrefix(info.Name(), "cali_jump") { | ||
| log.Debugf("Jump map: %s", p) | ||
| count++ | ||
| } | ||
| return nil | ||
| }) | ||
|
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| if err != nil { | ||
| panic(err) | ||
| } | ||
| return count | ||
| } | ||
|
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| func countTCDirs() int { | ||
| var count int | ||
| err := filepath.Walk("/sys/fs/bpf/tc", func(p string, info os.FileInfo, err error) error { | ||
| if err != nil { | ||
| return err | ||
| } | ||
| if info.IsDir() && len(info.Name()) == 40 { | ||
| log.Debugf("TC dir: %s", p) | ||
| count++ | ||
| } | ||
| return nil | ||
| }) | ||
|
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| if err != nil { | ||
| panic(err) | ||
| } | ||
| return count | ||
| } |
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