1 // Copyright (c) 2019 Cisco and/or its affiliates.
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at:
7 // http://www.apache.org/licenses/LICENSE-2.0
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
15 // Package statsclient is pure Go implementation of VPP stats API client.
25 logger "github.com/sirupsen/logrus"
27 "git.fd.io/govpp.git/adapter"
31 // Debug is global variable that determines debug mode
32 Debug = os.Getenv("DEBUG_GOVPP_STATS") != ""
34 // Log is global logger
38 // init initializes global logger, which logs debug level messages to stdout.
42 Log.Level = logger.DebugLevel
43 Log.Debug("enabled debug mode")
47 // StatsClient is the pure Go implementation for VPP stats API.
48 type StatsClient struct {
55 // NewStatsClient returns new VPP stats API client.
56 func NewStatsClient(sockAddr string) *StatsClient {
58 sockAddr = adapter.DefaultStatsSocket
65 const sockNotFoundWarn = `VPP stats socket not found at: %s!
66 Check if VPP is running with stats segment enabled.
67 To enable it include following section in VPP config:
73 func (c *StatsClient) Connect() error {
74 // check if socket exists
75 if _, err := os.Stat(c.sockAddr); os.IsNotExist(err) {
76 Log.Warnf(sockNotFoundWarn, c.sockAddr)
77 return fmt.Errorf("stats socket file %s does not exist", c.sockAddr)
78 } else if err != nil {
79 return fmt.Errorf("stats socket error: %v", err)
82 if err := c.statSegment.connect(c.sockAddr); err != nil {
86 ver := c.readVersion()
87 Log.Debugf("stat segment version: %v", ver)
89 if err := checkVersion(ver); err != nil {
96 func (c *StatsClient) Disconnect() error {
97 if err := c.statSegment.disconnect(); err != nil {
104 func (c *StatsClient) ListStats(patterns ...string) (statNames []string, err error) {
105 sa := c.accessStart()
107 return nil, fmt.Errorf("access failed")
110 dirOffset, _, _ := c.readOffsets()
111 Log.Debugf("dirOffset: %v", dirOffset)
113 vecLen := vectorLen(unsafe.Pointer(&c.sharedHeader[dirOffset]))
114 Log.Debugf("vecLen: %v", vecLen)
115 Log.Debugf("unsafe.Sizeof(statSegDirectoryEntry{}): %v", unsafe.Sizeof(statSegDirectoryEntry{}))
117 for i := uint64(0); i < vecLen; i++ {
118 offset := uintptr(i) * unsafe.Sizeof(statSegDirectoryEntry{})
119 dirEntry := (*statSegDirectoryEntry)(add(unsafe.Pointer(&c.sharedHeader[dirOffset]), offset))
121 nul := bytes.IndexByte(dirEntry.name[:], '\x00')
123 Log.Debugf("no zero byte found for: %q", dirEntry.name[:])
126 name := string(dirEntry.name[:nul])
128 Log.Debugf("entry with empty name found (%d)", i)
132 Log.Debugf(" %80q (type: %v, data: %d, offset: %d) ", name, dirEntry.directoryType, dirEntry.unionData, dirEntry.offsetVector)
134 if nameMatches(name, patterns) {
135 statNames = append(statNames, name)
138 // TODO: copy the listed entries elsewhere
141 if !c.accessEnd(sa) {
142 return nil, adapter.ErrStatDirBusy
145 c.currentEpoch = sa.epoch
147 return statNames, nil
150 func (c *StatsClient) DumpStats(patterns ...string) (entries []*adapter.StatEntry, err error) {
151 epoch, _ := c.readEpoch()
152 if c.currentEpoch > 0 && c.currentEpoch != epoch { // TODO: do list stats before dump
153 return nil, fmt.Errorf("old data")
156 sa := c.accessStart()
158 return nil, fmt.Errorf("access failed")
161 dirOffset, _, _ := c.readOffsets()
162 vecLen := vectorLen(unsafe.Pointer(&c.sharedHeader[dirOffset]))
164 for i := uint64(0); i < vecLen; i++ {
165 offset := uintptr(i) * unsafe.Sizeof(statSegDirectoryEntry{})
166 dirEntry := (*statSegDirectoryEntry)(add(unsafe.Pointer(&c.sharedHeader[dirOffset]), offset))
168 nul := bytes.IndexByte(dirEntry.name[:], '\x00')
170 Log.Debugf("no zero byte found for: %q", dirEntry.name[:])
173 name := string(dirEntry.name[:nul])
175 Log.Debugf("entry with empty name found (%d)", i)
179 Log.Debugf(" - %s (type: %v, data: %v, offset: %v) ", name, dirEntry.directoryType, dirEntry.unionData, dirEntry.offsetVector)
181 entry := adapter.StatEntry{
183 Type: adapter.StatType(dirEntry.directoryType),
184 Data: c.copyData(dirEntry),
187 Log.Debugf("\tentry data: %#v", entry.Data)
189 if nameMatches(entry.Name, patterns) {
190 entries = append(entries, &entry)
194 if !c.accessEnd(sa) {
195 return nil, adapter.ErrStatDumpBusy
201 func (c *StatsClient) copyData(dirEntry *statSegDirectoryEntry) adapter.Stat {
202 switch typ := adapter.StatType(dirEntry.directoryType); typ {
203 case adapter.ScalarIndex:
204 return adapter.ScalarStat(dirEntry.unionData)
206 case adapter.ErrorIndex:
207 _, errOffset, _ := c.readOffsets()
208 offsetVector := unsafe.Pointer(&c.sharedHeader[errOffset])
209 vecLen := vectorLen(offsetVector)
211 var errData adapter.Counter
212 for i := uint64(0); i < vecLen; i++ {
213 cb := *(*uint64)(add(offsetVector, uintptr(i)*unsafe.Sizeof(uint64(0))))
214 offset := uintptr(cb) + uintptr(dirEntry.unionData)*unsafe.Sizeof(adapter.Counter(0))
215 val := *(*adapter.Counter)(add(unsafe.Pointer(&c.sharedHeader[0]), offset))
218 return adapter.ErrorStat(errData)
220 case adapter.SimpleCounterVector:
221 if dirEntry.unionData == 0 {
222 Log.Debugf("\toffset is not valid")
224 } else if dirEntry.unionData >= uint64(len(c.sharedHeader)) {
225 Log.Debugf("\toffset out of range")
229 simpleCounter := unsafe.Pointer(&c.sharedHeader[dirEntry.unionData]) // offset
230 vecLen := vectorLen(simpleCounter)
231 offsetVector := add(unsafe.Pointer(&c.sharedHeader[0]), uintptr(dirEntry.offsetVector))
233 data := make([][]adapter.Counter, vecLen)
234 for i := uint64(0); i < vecLen; i++ {
235 cb := *(*uint64)(add(offsetVector, uintptr(i)*unsafe.Sizeof(uint64(0))))
236 counterVec := unsafe.Pointer(&c.sharedHeader[uintptr(cb)])
237 vecLen2 := vectorLen(counterVec)
238 for j := uint64(0); j < vecLen2; j++ {
239 offset := uintptr(j) * unsafe.Sizeof(adapter.Counter(0))
240 val := *(*adapter.Counter)(add(counterVec, offset))
241 data[i] = append(data[i], val)
244 return adapter.SimpleCounterStat(data)
246 case adapter.CombinedCounterVector:
247 if dirEntry.unionData == 0 {
248 Log.Debugf("\toffset is not valid")
250 } else if dirEntry.unionData >= uint64(len(c.sharedHeader)) {
251 Log.Debugf("\toffset out of range")
255 combinedCounter := unsafe.Pointer(&c.sharedHeader[dirEntry.unionData]) // offset
256 vecLen := vectorLen(combinedCounter)
257 offsetVector := add(unsafe.Pointer(&c.sharedHeader[0]), uintptr(dirEntry.offsetVector))
259 data := make([][]adapter.CombinedCounter, vecLen)
260 for i := uint64(0); i < vecLen; i++ {
261 cb := *(*uint64)(add(offsetVector, uintptr(i)*unsafe.Sizeof(uint64(0))))
262 counterVec := unsafe.Pointer(&c.sharedHeader[uintptr(cb)])
263 vecLen2 := vectorLen(counterVec)
264 for j := uint64(0); j < vecLen2; j++ {
265 offset := uintptr(j) * unsafe.Sizeof(adapter.CombinedCounter{})
266 val := *(*adapter.CombinedCounter)(add(counterVec, offset))
267 data[i] = append(data[i], val)
270 return adapter.CombinedCounterStat(data)
272 case adapter.NameVector:
273 if dirEntry.unionData == 0 {
274 Log.Debugf("\toffset is not valid")
276 } else if dirEntry.unionData >= uint64(len(c.sharedHeader)) {
277 Log.Debugf("\toffset out of range")
281 nameVector := unsafe.Pointer(&c.sharedHeader[dirEntry.unionData]) // offset
282 vecLen := vectorLen(nameVector)
283 offsetVector := add(unsafe.Pointer(&c.sharedHeader[0]), uintptr(dirEntry.offsetVector))
285 data := make([]adapter.Name, vecLen)
286 for i := uint64(0); i < vecLen; i++ {
287 cb := *(*uint64)(add(offsetVector, uintptr(i)*unsafe.Sizeof(uint64(0))))
289 Log.Debugf("\tname vector cb out of range")
292 nameVec := unsafe.Pointer(&c.sharedHeader[cb])
293 vecLen2 := vectorLen(nameVec)
296 for j := uint64(0); j < vecLen2; j++ {
297 offset := uintptr(j) * unsafe.Sizeof(byte(0))
298 val := *(*byte)(add(nameVec, offset))
300 nameStr = append(nameStr, val)
303 data[i] = adapter.Name(nameStr)
305 return adapter.NameStat(data)
308 Log.Warnf("Unknown type %d for stat entry: %q", dirEntry.directoryType, dirEntry.name)
314 func nameMatches(name string, patterns []string) bool {
315 if len(patterns) == 0 {
318 for _, pattern := range patterns {
319 matched, err := regexp.MatchString(pattern, name)
320 if err == nil && matched {