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//go:build linux
package storage
import (
"os"
"path/filepath"
"reflect"
"testing"
"github.com/containers/storage/pkg/idtools"
)
func TestGetAutoUserNSMapping(t *testing.T) {
type args struct {
size int
availableUIDs *idSet
availableGIDs *idSet
usedUIDMappings []idtools.IDMap
usedGIDMappings []idtools.IDMap
additionalUIDMappings []idtools.IDMap
additionalGIDMappings []idtools.IDMap
}
tests := []struct {
name string
args args
wantUIDMappings []idtools.IDMap
wantGIDMappings []idtools.IDMap
wantErr bool
}{
{
name: "Normal",
args: args{
size: 65536,
availableUIDs: newIDSet([]interval{{1000, 100000}}),
availableGIDs: newIDSet([]interval{{1000, 100000}}),
},
wantUIDMappings: []idtools.IDMap{{ContainerID: 0, HostID: 1000, Size: 65536}},
wantGIDMappings: []idtools.IDMap{{ContainerID: 0, HostID: 1000, Size: 65536}},
},
{
name: "NotEnoughAvailableUIDs",
args: args{
size: 65536,
availableUIDs: newIDSet([]interval{{1000, 10000}}),
availableGIDs: newIDSet([]interval{{1000, 100000}}),
},
wantErr: true,
},
{
name: "NotEnoughAvailableGIDs",
args: args{
size: 65536,
availableUIDs: newIDSet([]interval{{1000, 100000}}),
availableGIDs: newIDSet([]interval{{1000, 10000}}),
},
wantErr: true,
},
{
name: "WithUsedIDs",
args: args{
size: 65536,
availableUIDs: newIDSet([]interval{{1000, 100000}}),
availableGIDs: newIDSet([]interval{{1000, 100000}}),
usedUIDMappings: []idtools.IDMap{{ContainerID: 0, HostID: 2000, Size: 10000}},
usedGIDMappings: []idtools.IDMap{
{ContainerID: 0, HostID: 1000, Size: 10000},
{ContainerID: 10000, HostID: 20000, Size: 5000},
{ContainerID: 15000, HostID: 30000, Size: 5000},
},
},
wantUIDMappings: []idtools.IDMap{
{ContainerID: 0, HostID: 1000, Size: 1000},
{ContainerID: 1000, HostID: 12000, Size: 65536 - 1000},
},
wantGIDMappings: []idtools.IDMap{
{ContainerID: 0, HostID: 11000, Size: 9000},
{ContainerID: 9000, HostID: 25000, Size: 5000},
{ContainerID: 14000, HostID: 35000, Size: 65536 - 9000 - 5000},
},
},
{
name: "WithUsedAndAdditionalIDs",
args: args{
size: 65536,
availableUIDs: newIDSet([]interval{{1000, 100000}}),
availableGIDs: newIDSet([]interval{{1000, 100000}}),
usedUIDMappings: []idtools.IDMap{{ContainerID: 0, HostID: 2000, Size: 10000}},
usedGIDMappings: []idtools.IDMap{
{ContainerID: 0, HostID: 1000, Size: 10000},
{ContainerID: 10000, HostID: 20000, Size: 5000},
{ContainerID: 15000, HostID: 30000, Size: 5000},
},
additionalUIDMappings: []idtools.IDMap{{ContainerID: 0, HostID: 1000, Size: 1}},
additionalGIDMappings: []idtools.IDMap{{ContainerID: 1, HostID: 1001, Size: 1}},
},
wantUIDMappings: []idtools.IDMap{
{ContainerID: 1, HostID: 1001, Size: 999},
{ContainerID: 1000, HostID: 12000, Size: 65535 - 999},
{ContainerID: 0, HostID: 1000, Size: 1},
},
wantGIDMappings: []idtools.IDMap{
{ContainerID: 0, HostID: 11000, Size: 1},
{ContainerID: 2, HostID: 11001, Size: 8999},
{ContainerID: 9001, HostID: 25000, Size: 5000},
{ContainerID: 14001, HostID: 35000, Size: 65535 - 1 - 8999 - 5000},
{ContainerID: 1, HostID: 1001, Size: 1},
},
},
{
name: "DiscontinuedAvailableIntervals",
args: args{
size: 65536,
availableUIDs: newIDSet([]interval{{1000, 50000}, {80000, 130000}}),
availableGIDs: newIDSet([]interval{{1000, 30000}, {70000, 90000}, {110000, 160000}}),
usedUIDMappings: []idtools.IDMap{
{ContainerID: 0, HostID: 2000, Size: 10000},
{ContainerID: 0, HostID: 10000, Size: 10000},
{ContainerID: 0, HostID: 40000, Size: 10000},
},
usedGIDMappings: []idtools.IDMap{
{ContainerID: 0, HostID: 1000, Size: 10000},
{ContainerID: 100, HostID: 20000, Size: 5000},
{ContainerID: 150, HostID: 30000, Size: 5000},
},
additionalUIDMappings: []idtools.IDMap{
{ContainerID: 0, HostID: 1002, Size: 1},
},
additionalGIDMappings: []idtools.IDMap{
{ContainerID: 0, HostID: 1003, Size: 1},
{ContainerID: 1, HostID: 1001, Size: 1},
{ContainerID: 2, HostID: 1006, Size: 1},
{ContainerID: 100, HostID: 1100, Size: 10},
},
},
wantUIDMappings: []idtools.IDMap{
{ContainerID: 1, HostID: 1000, Size: 2},
{ContainerID: 3, HostID: 1003, Size: 997},
{ContainerID: 1000, HostID: 20000, Size: 20000},
{ContainerID: 21000, HostID: 80000, Size: 65535 - 2 - 997 - 20000},
{ContainerID: 0, HostID: 1002, Size: 1},
},
wantGIDMappings: []idtools.IDMap{
{ContainerID: 3, HostID: 11000, Size: 97},
{ContainerID: 110, HostID: 11000 + 97, Size: /*9000-97=*/ 8903},
{ContainerID: /*110+8903=*/ 9013, HostID: 25000, Size: 5000},
{ContainerID: /*9013+5000=*/ 14013, HostID: 70000, Size: 20000},
{ContainerID: /*14013+20000*/ 34013, HostID: 110000, Size: 65536 - 13 - 97 - 8903 - 5000 - 20000},
{ContainerID: 0, HostID: 1003, Size: 1},
{ContainerID: 1, HostID: 1001, Size: 1},
{ContainerID: 2, HostID: 1006, Size: 1},
{ContainerID: 100, HostID: 1100, Size: 10},
},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
gotUIDMappings, gotGIDMappings, err := getAutoUserNSIDMappings(
tt.args.size,
tt.args.availableUIDs, tt.args.availableGIDs,
tt.args.usedUIDMappings, tt.args.usedGIDMappings,
tt.args.additionalUIDMappings, tt.args.additionalGIDMappings,
)
if (err != nil) != tt.wantErr {
t.Errorf("getAutoUserNSMapping() error = %v, wantErr %v", err, tt.wantErr)
return
}
if !reflect.DeepEqual(gotUIDMappings, tt.wantUIDMappings) {
t.Errorf("getAutoUserNSMapping() gotUIDMappings = %v, want %v", gotUIDMappings, tt.wantUIDMappings)
}
if !reflect.DeepEqual(gotGIDMappings, tt.wantGIDMappings) {
t.Errorf("getAutoUserNSMapping() gotGIDMappings = %v, want %v", gotGIDMappings, tt.wantGIDMappings)
}
})
}
}
func TestParseMountedFiles(t *testing.T) {
tests := []struct {
name string
passwdContent string
groupContent string
expectedMax uint32
}{
{
name: "basic case",
passwdContent: `
root:x:0:0:root:/root:/bin/bash
user1:x:1000:1000::/home/user1:/bin/bash
nobody:x:65534:65534:nobody:/nonexistent:/usr/sbin/nologin`,
groupContent: `
root:x:0:
user1:x:1000:
nogroup:x:65534:`,
expectedMax: 1001,
},
{
name: "only passwd",
passwdContent: `
root:x:0:0:root:/root:/bin/bash
user1:x:4001:4001::/home/user1:/bin/bash
nobody:x:65534:65534:nobody:/nonexistent:/usr/sbin/nologin`,
groupContent: "",
expectedMax: 4002,
},
{
name: "only groups",
passwdContent: "",
groupContent: `
root:x:0:
admin:x:3000:
nobody:x:65534:`,
expectedMax: 3001,
},
{
name: "empty files",
passwdContent: "",
groupContent: "",
expectedMax: 0,
},
{
name: "invalid passwd file",
passwdContent: "FOOBAR",
groupContent: "",
expectedMax: 0,
},
{
name: "invalid groups file",
passwdContent: "",
groupContent: "FOOBAR",
expectedMax: 0,
},
{
name: "nogroup ignored",
passwdContent: "",
groupContent: `
root:x:0:
admin:x:4000:
nogroup:x:65533:`,
expectedMax: 4001,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
tmpDir, err := os.MkdirTemp("", "containermount")
if err != nil {
t.Fatalf("Failed to create temp dir: %v", err)
}
defer os.RemoveAll(tmpDir)
passwdFile := filepath.Join(tmpDir, "passwd")
if err := os.WriteFile(passwdFile, []byte(tt.passwdContent), 0o644); err != nil {
t.Fatalf("Failed to write passwd file: %v", err)
}
groupFile := filepath.Join(tmpDir, "group")
if err := os.WriteFile(groupFile, []byte(tt.groupContent), 0o644); err != nil {
t.Fatalf("Failed to write group file: %v", err)
}
result := parseMountedFiles(tmpDir, passwdFile, groupFile)
if result != tt.expectedMax {
t.Errorf("Expected max %d, but got %d", tt.expectedMax, result)
}
})
}
}
|
