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vendor: containerd

docker-18.09
Tonis Tiigi 2017-05-26 10:20:14 -07:00
parent 81b0246dc5
commit 5509c18410
258 changed files with 58453 additions and 1 deletions
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13
vendor.conf
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@ -4,4 +4,15 @@ github.com/pkg/errors c605e284fe17294bda444b34710735b29d1a9d90
github.com/stretchr/testify faf0710ff28e0389cd8f4761de3fbf4b7cd1057d
github.com/davecgh/go-spew 346938d642f2ec3594ed81d874461961cd0faa76
github.com/pmezard/go-difflib 792786c7400a136282c1664665ae0a8db921c6c2
golang.org/x/sys a55a76086885b80f79961eacb876ebd8caf3868d
golang.org/x/sys a55a76086885b80f79961eacb876ebd8caf3868d
github.com/containerd/containerd 199544ea8009bf6988a81456c7dec66b2d3268e0
golang.org/x/sync 450f422ab23cf9881c94e2db30cac0eb1b7cf80c
github.com/Sirupsen/logrus v0.11.0
google.golang.org/grpc v1.0.5
github.com/opencontainers/go-digest 21dfd564fd89c944783d00d069f33e3e7123c448
github.com/nightlyone/lockfile 1d49c987357a327b5b03aa84cbddd582c328615d
golang.org/x/net 8b4af36cd21a1f85a7484b49feb7c79363106d8e
github.com/gogo/protobuf d2e1ade2d719b78fe5b061b4c18a9f7111b5bdc8
github.com/golang/protobuf 8ee79997227bf9b34611aee7946ae64735e6fd93
github.com/containerd/continuity f4ad4294c92f596c9241947c416d1297f9faf3ea

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The MIT License (MIT)
Copyright (c) 2014 Simon Eskildsen
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

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# Logrus <img src="http://i.imgur.com/hTeVwmJ.png" width="40" height="40" alt=":walrus:" class="emoji" title=":walrus:"/>&nbsp;[![Build Status](https://travis-ci.org/Sirupsen/logrus.svg?branch=master)](https://travis-ci.org/Sirupsen/logrus)&nbsp;[![GoDoc](https://godoc.org/github.com/Sirupsen/logrus?status.svg)](https://godoc.org/github.com/Sirupsen/logrus)
Logrus is a structured logger for Go (golang), completely API compatible with
the standard library logger. [Godoc][godoc]. **Please note the Logrus API is not
yet stable (pre 1.0). Logrus itself is completely stable and has been used in
many large deployments. The core API is unlikely to change much but please
version control your Logrus to make sure you aren't fetching latest `master` on
every build.**
Nicely color-coded in development (when a TTY is attached, otherwise just
plain text):
![Colored](http://i.imgur.com/PY7qMwd.png)
With `log.SetFormatter(&log.JSONFormatter{})`, for easy parsing by logstash
or Splunk:
```json
{"animal":"walrus","level":"info","msg":"A group of walrus emerges from the
ocean","size":10,"time":"2014-03-10 19:57:38.562264131 -0400 EDT"}
{"level":"warning","msg":"The group's number increased tremendously!",
"number":122,"omg":true,"time":"2014-03-10 19:57:38.562471297 -0400 EDT"}
{"animal":"walrus","level":"info","msg":"A giant walrus appears!",
"size":10,"time":"2014-03-10 19:57:38.562500591 -0400 EDT"}
{"animal":"walrus","level":"info","msg":"Tremendously sized cow enters the ocean.",
"size":9,"time":"2014-03-10 19:57:38.562527896 -0400 EDT"}
{"level":"fatal","msg":"The ice breaks!","number":100,"omg":true,
"time":"2014-03-10 19:57:38.562543128 -0400 EDT"}
```
With the default `log.SetFormatter(&log.TextFormatter{})` when a TTY is not
attached, the output is compatible with the
[logfmt](http://godoc.org/github.com/kr/logfmt) format:
```text
time="2015-03-26T01:27:38-04:00" level=debug msg="Started observing beach" animal=walrus number=8
time="2015-03-26T01:27:38-04:00" level=info msg="A group of walrus emerges from the ocean" animal=walrus size=10
time="2015-03-26T01:27:38-04:00" level=warning msg="The group's number increased tremendously!" number=122 omg=true
time="2015-03-26T01:27:38-04:00" level=debug msg="Temperature changes" temperature=-4
time="2015-03-26T01:27:38-04:00" level=panic msg="It's over 9000!" animal=orca size=9009
time="2015-03-26T01:27:38-04:00" level=fatal msg="The ice breaks!" err=&{0x2082280c0 map[animal:orca size:9009] 2015-03-26 01:27:38.441574009 -0400 EDT panic It's over 9000!} number=100 omg=true
exit status 1
```
#### Example
The simplest way to use Logrus is simply the package-level exported logger:
```go
package main
import (
log "github.com/Sirupsen/logrus"
)
func main() {
log.WithFields(log.Fields{
"animal": "walrus",
}).Info("A walrus appears")
}
```
Note that it's completely api-compatible with the stdlib logger, so you can
replace your `log` imports everywhere with `log "github.com/Sirupsen/logrus"`
and you'll now have the flexibility of Logrus. You can customize it all you
want:
```go
package main
import (
"os"
log "github.com/Sirupsen/logrus"
)
func init() {
// Log as JSON instead of the default ASCII formatter.
log.SetFormatter(&log.JSONFormatter{})
// Output to stderr instead of stdout, could also be a file.
log.SetOutput(os.Stderr)
// Only log the warning severity or above.
log.SetLevel(log.WarnLevel)
}
func main() {
log.WithFields(log.Fields{
"animal": "walrus",
"size": 10,
}).Info("A group of walrus emerges from the ocean")
log.WithFields(log.Fields{
"omg": true,
"number": 122,
}).Warn("The group's number increased tremendously!")
log.WithFields(log.Fields{
"omg": true,
"number": 100,
}).Fatal("The ice breaks!")
// A common pattern is to re-use fields between logging statements by re-using
// the logrus.Entry returned from WithFields()
contextLogger := log.WithFields(log.Fields{
"common": "this is a common field",
"other": "I also should be logged always",
})
contextLogger.Info("I'll be logged with common and other field")
contextLogger.Info("Me too")
}
```
For more advanced usage such as logging to multiple locations from the same
application, you can also create an instance of the `logrus` Logger:
```go
package main
import (
"github.com/Sirupsen/logrus"
)
// Create a new instance of the logger. You can have any number of instances.
var log = logrus.New()
func main() {
// The API for setting attributes is a little different than the package level
// exported logger. See Godoc.
log.Out = os.Stderr
log.WithFields(logrus.Fields{
"animal": "walrus",
"size": 10,
}).Info("A group of walrus emerges from the ocean")
}
```
#### Fields
Logrus encourages careful, structured logging though logging fields instead of
long, unparseable error messages. For example, instead of: `log.Fatalf("Failed
to send event %s to topic %s with key %d")`, you should log the much more
discoverable:
```go
log.WithFields(log.Fields{
"event": event,
"topic": topic,
"key": key,
}).Fatal("Failed to send event")
```
We've found this API forces you to think about logging in a way that produces
much more useful logging messages. We've been in countless situations where just
a single added field to a log statement that was already there would've saved us
hours. The `WithFields` call is optional.
In general, with Logrus using any of the `printf`-family functions should be
seen as a hint you should add a field, however, you can still use the
`printf`-family functions with Logrus.
#### Hooks
You can add hooks for logging levels. For example to send errors to an exception
tracking service on `Error`, `Fatal` and `Panic`, info to StatsD or log to
multiple places simultaneously, e.g. syslog.
Logrus comes with [built-in hooks](hooks/). Add those, or your custom hook, in
`init`:
```go
import (
log "github.com/Sirupsen/logrus"
"gopkg.in/gemnasium/logrus-airbrake-hook.v2" // the package is named "aibrake"
logrus_syslog "github.com/Sirupsen/logrus/hooks/syslog"
"log/syslog"
)
func init() {
// Use the Airbrake hook to report errors that have Error severity or above to
// an exception tracker. You can create custom hooks, see the Hooks section.
log.AddHook(airbrake.NewHook(123, "xyz", "production"))
hook, err := logrus_syslog.NewSyslogHook("udp", "localhost:514", syslog.LOG_INFO, "")
if err != nil {
log.Error("Unable to connect to local syslog daemon")
} else {
log.AddHook(hook)
}
}
```
Note: Syslog hook also support connecting to local syslog (Ex. "/dev/log" or "/var/run/syslog" or "/var/run/log"). For the detail, please check the [syslog hook README](hooks/syslog/README.md).
| Hook | Description |
| ----- | ----------- |
| [Airbrake](https://github.com/gemnasium/logrus-airbrake-hook) | Send errors to the Airbrake API V3. Uses the official [`gobrake`](https://github.com/airbrake/gobrake) behind the scenes. |
| [Airbrake "legacy"](https://github.com/gemnasium/logrus-airbrake-legacy-hook) | Send errors to an exception tracking service compatible with the Airbrake API V2. Uses [`airbrake-go`](https://github.com/tobi/airbrake-go) behind the scenes. |
| [Papertrail](https://github.com/polds/logrus-papertrail-hook) | Send errors to the [Papertrail](https://papertrailapp.com) hosted logging service via UDP. |
| [Syslog](https://github.com/Sirupsen/logrus/blob/master/hooks/syslog/syslog.go) | Send errors to remote syslog server. Uses standard library `log/syslog` behind the scenes. |
| [Bugsnag](https://github.com/Shopify/logrus-bugsnag/blob/master/bugsnag.go) | Send errors to the Bugsnag exception tracking service. |
| [Sentry](https://github.com/evalphobia/logrus_sentry) | Send errors to the Sentry error logging and aggregation service. |
| [Hiprus](https://github.com/nubo/hiprus) | Send errors to a channel in hipchat. |
| [Logrusly](https://github.com/sebest/logrusly) | Send logs to [Loggly](https://www.loggly.com/) |
| [Slackrus](https://github.com/johntdyer/slackrus) | Hook for Slack chat. |
| [Journalhook](https://github.com/wercker/journalhook) | Hook for logging to `systemd-journald` |
| [Graylog](https://github.com/gemnasium/logrus-graylog-hook) | Hook for logging to [Graylog](http://graylog2.org/) |
| [Raygun](https://github.com/squirkle/logrus-raygun-hook) | Hook for logging to [Raygun.io](http://raygun.io/) |
| [LFShook](https://github.com/rifflock/lfshook) | Hook for logging to the local filesystem |
| [Honeybadger](https://github.com/agonzalezro/logrus_honeybadger) | Hook for sending exceptions to Honeybadger |
| [Mail](https://github.com/zbindenren/logrus_mail) | Hook for sending exceptions via mail |
| [Rollrus](https://github.com/heroku/rollrus) | Hook for sending errors to rollbar |
| [Fluentd](https://github.com/evalphobia/logrus_fluent) | Hook for logging to fluentd |
| [Mongodb](https://github.com/weekface/mgorus) | Hook for logging to mongodb |
| [Influxus] (http://github.com/vlad-doru/influxus) | Hook for concurrently logging to [InfluxDB] (http://influxdata.com/) |
| [InfluxDB](https://github.com/Abramovic/logrus_influxdb) | Hook for logging to influxdb |
| [Octokit](https://github.com/dorajistyle/logrus-octokit-hook) | Hook for logging to github via octokit |
| [DeferPanic](https://github.com/deferpanic/dp-logrus) | Hook for logging to DeferPanic |
| [Redis-Hook](https://github.com/rogierlommers/logrus-redis-hook) | Hook for logging to a ELK stack (through Redis) |
| [Amqp-Hook](https://github.com/vladoatanasov/logrus_amqp) | Hook for logging to Amqp broker (Like RabbitMQ) |
| [KafkaLogrus](https://github.com/goibibo/KafkaLogrus) | Hook for logging to kafka |
| [Typetalk](https://github.com/dragon3/logrus-typetalk-hook) | Hook for logging to [Typetalk](https://www.typetalk.in/) |
| [ElasticSearch](https://github.com/sohlich/elogrus) | Hook for logging to ElasticSearch|
| [Sumorus](https://github.com/doublefree/sumorus) | Hook for logging to [SumoLogic](https://www.sumologic.com/)|
| [Scribe](https://github.com/sagar8192/logrus-scribe-hook) | Hook for logging to [Scribe](https://github.com/facebookarchive/scribe)|
| [Logstash](https://github.com/bshuster-repo/logrus-logstash-hook) | Hook for logging to [Logstash](https://www.elastic.co/products/logstash) |
| [logz.io](https://github.com/ripcurld00d/logrus-logzio-hook) | Hook for logging to [logz.io](https://logz.io), a Log as a Service using Logstash |
| [Logmatic.io](https://github.com/logmatic/logmatic-go) | Hook for logging to [Logmatic.io](http://logmatic.io/) |
| [Pushover](https://github.com/toorop/logrus_pushover) | Send error via [Pushover](https://pushover.net) |
#### Level logging
Logrus has six logging levels: Debug, Info, Warning, Error, Fatal and Panic.
```go
log.Debug("Useful debugging information.")
log.Info("Something noteworthy happened!")
log.Warn("You should probably take a look at this.")
log.Error("Something failed but I'm not quitting.")
// Calls os.Exit(1) after logging
log.Fatal("Bye.")
// Calls panic() after logging
log.Panic("I'm bailing.")
```
You can set the logging level on a `Logger`, then it will only log entries with
that severity or anything above it:
```go
// Will log anything that is info or above (warn, error, fatal, panic). Default.
log.SetLevel(log.InfoLevel)
```
It may be useful to set `log.Level = logrus.DebugLevel` in a debug or verbose
environment if your application has that.
#### Entries
Besides the fields added with `WithField` or `WithFields` some fields are
automatically added to all logging events:
1. `time`. The timestamp when the entry was created.
2. `msg`. The logging message passed to `{Info,Warn,Error,Fatal,Panic}` after
the `AddFields` call. E.g. `Failed to send event.`
3. `level`. The logging level. E.g. `info`.
#### Environments
Logrus has no notion of environment.
If you wish for hooks and formatters to only be used in specific environments,
you should handle that yourself. For example, if your application has a global
variable `Environment`, which is a string representation of the environment you
could do:
```go
import (
log "github.com/Sirupsen/logrus"
)
init() {
// do something here to set environment depending on an environment variable
// or command-line flag
if Environment == "production" {
log.SetFormatter(&log.JSONFormatter{})
} else {
// The TextFormatter is default, you don't actually have to do this.
log.SetFormatter(&log.TextFormatter{})
}
}
```
This configuration is how `logrus` was intended to be used, but JSON in
production is mostly only useful if you do log aggregation with tools like
Splunk or Logstash.
#### Formatters
The built-in logging formatters are:
* `logrus.TextFormatter`. Logs the event in colors if stdout is a tty, otherwise
without colors.
* *Note:* to force colored output when there is no TTY, set the `ForceColors`
field to `true`. To force no colored output even if there is a TTY set the
`DisableColors` field to `true`
* `logrus.JSONFormatter`. Logs fields as JSON.
Third party logging formatters:
* [`logstash`](https://github.com/bshuster-repo/logrus-logstash-hook). Logs fields as [Logstash](http://logstash.net) Events.
* [`prefixed`](https://github.com/x-cray/logrus-prefixed-formatter). Displays log entry source along with alternative layout.
* [`zalgo`](https://github.com/aybabtme/logzalgo). Invoking the P͉̫o̳̼̊w̖͈̰͎e̬͔̭͂r͚̼̹̲ ̫͓͉̳͈ō̠͕͖̚f̝͍̠ ͕̲̞͖͑Z̖̫̤̫ͪa͉̬͈̗l͖͎g̳̥o̰̥̅!̣͔̲̻͊̄ ̙̘̦̹̦.
You can define your formatter by implementing the `Formatter` interface,
requiring a `Format` method. `Format` takes an `*Entry`. `entry.Data` is a
`Fields` type (`map[string]interface{}`) with all your fields as well as the
default ones (see Entries section above):
```go
type MyJSONFormatter struct {
}
log.SetFormatter(new(MyJSONFormatter))
func (f *MyJSONFormatter) Format(entry *Entry) ([]byte, error) {
// Note this doesn't include Time, Level and Message which are available on
// the Entry. Consult `godoc` on information about those fields or read the
// source of the official loggers.
serialized, err := json.Marshal(entry.Data)
if err != nil {
return nil, fmt.Errorf("Failed to marshal fields to JSON, %v", err)
}
return append(serialized, '\n'), nil
}
```
#### Logger as an `io.Writer`
Logrus can be transformed into an `io.Writer`. That writer is the end of an `io.Pipe` and it is your responsibility to close it.
```go
w := logger.Writer()
defer w.Close()
srv := http.Server{
// create a stdlib log.Logger that writes to
// logrus.Logger.
ErrorLog: log.New(w, "", 0),
}
```
Each line written to that writer will be printed the usual way, using formatters
and hooks. The level for those entries is `info`.
#### Rotation
Log rotation is not provided with Logrus. Log rotation should be done by an
external program (like `logrotate(8)`) that can compress and delete old log
entries. It should not be a feature of the application-level logger.
#### Tools
| Tool | Description |
| ---- | ----------- |
|[Logrus Mate](https://github.com/gogap/logrus_mate)|Logrus mate is a tool for Logrus to manage loggers, you can initial logger's level, hook and formatter by config file, the logger will generated with different config at different environment.|
|[Logrus Viper Helper](https://github.com/heirko/go-contrib/tree/master/logrusHelper)|An Helper arround Logrus to wrap with spf13/Viper to load configuration with fangs! And to simplify Logrus configuration use some behavior of [Logrus Mate](https://github.com/gogap/logrus_mate). [sample](https://github.com/heirko/iris-contrib/blob/master/middleware/logrus-logger/example) |
#### Testing
Logrus has a built in facility for asserting the presence of log messages. This is implemented through the `test` hook and provides:
* decorators for existing logger (`test.NewLocal` and `test.NewGlobal`) which basically just add the `test` hook
* a test logger (`test.NewNullLogger`) that just records log messages (and does not output any):
```go
logger, hook := NewNullLogger()
logger.Error("Hello error")
assert.Equal(1, len(hook.Entries))
assert.Equal(logrus.ErrorLevel, hook.LastEntry().Level)
assert.Equal("Hello error", hook.LastEntry().Message)
hook.Reset()
assert.Nil(hook.LastEntry())
```
#### Fatal handlers
Logrus can register one or more functions that will be called when any `fatal`
level message is logged. The registered handlers will be executed before
logrus performs a `os.Exit(1)`. This behavior may be helpful if callers need
to gracefully shutdown. Unlike a `panic("Something went wrong...")` call which can be intercepted with a deferred `recover` a call to `os.Exit(1)` can not be intercepted.
```
...
handler := func() {
// gracefully shutdown something...
}
logrus.RegisterExitHandler(handler)
...
```
#### Thread safty
By default Logger is protected by mutex for concurrent writes, this mutex is invoked when calling hooks and writing logs.
If you are sure such locking is not needed, you can call logger.SetNoLock() to disable the locking.
Situation when locking is not needed includes:
* You have no hooks registered, or hooks calling is already thread-safe.
* Writing to logger.Out is already thread-safe, for example:
1) logger.Out is protected by locks.
2) logger.Out is a os.File handler opened with `O_APPEND` flag, and every write is smaller than 4k. (This allow multi-thread/multi-process writing)
(Refer to http://www.notthewizard.com/2014/06/17/are-files-appends-really-atomic/)

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package logrus
// The following code was sourced and modified from the
// https://bitbucket.org/tebeka/atexit package governed by the following license:
//
// Copyright (c) 2012 Miki Tebeka <miki.tebeka@gmail.com>.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of
// this software and associated documentation files (the "Software"), to deal in
// the Software without restriction, including without limitation the rights to
// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
// the Software, and to permit persons to whom the Software is furnished to do so,
// subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
import (
"fmt"
"os"
)
var handlers = []func(){}
func runHandler(handler func()) {
defer func() {
if err := recover(); err != nil {
fmt.Fprintln(os.Stderr, "Error: Logrus exit handler error:", err)
}
}()
handler()
}
func runHandlers() {
for _, handler := range handlers {
runHandler(handler)
}
}
// Exit runs all the Logrus atexit handlers and then terminates the program using os.Exit(code)
func Exit(code int) {
runHandlers()
os.Exit(code)
}
// RegisterExitHandler adds a Logrus Exit handler, call logrus.Exit to invoke
// all handlers. The handlers will also be invoked when any Fatal log entry is
// made.
//
// This method is useful when a caller wishes to use logrus to log a fatal
// message but also needs to gracefully shutdown. An example usecase could be
// closing database connections, or sending a alert that the application is
// closing.
func RegisterExitHandler(handler func()) {
handlers = append(handlers, handler)
}

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/*
Package logrus is a structured logger for Go, completely API compatible with the standard library logger.
The simplest way to use Logrus is simply the package-level exported logger:
package main
import (
log "github.com/Sirupsen/logrus"
)
func main() {
log.WithFields(log.Fields{
"animal": "walrus",
"number": 1,
"size": 10,
}).Info("A walrus appears")
}
Output:
time="2015-09-07T08:48:33Z" level=info msg="A walrus appears" animal=walrus number=1 size=10
For a full guide visit https://github.com/Sirupsen/logrus
*/
package logrus

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package logrus
import (
"bytes"
"fmt"
"os"
"sync"
"time"
)
var bufferPool *sync.Pool
func init() {
bufferPool = &sync.Pool{
New: func() interface{} {
return new(bytes.Buffer)
},
}
}
// Defines the key when adding errors using WithError.
var ErrorKey = "error"
// An entry is the final or intermediate Logrus logging entry. It contains all
// the fields passed with WithField{,s}. It's finally logged when Debug, Info,
// Warn, Error, Fatal or Panic is called on it. These objects can be reused and
// passed around as much as you wish to avoid field duplication.
type Entry struct {
Logger *Logger
// Contains all the fields set by the user.
Data Fields
// Time at which the log entry was created
Time time.Time
// Level the log entry was logged at: Debug, Info, Warn, Error, Fatal or Panic
Level Level
// Message passed to Debug, Info, Warn, Error, Fatal or Panic
Message string
// When formatter is called in entry.log(), an Buffer may be set to entry
Buffer *bytes.Buffer
}
func NewEntry(logger *Logger) *Entry {
return &Entry{
Logger: logger,
// Default is three fields, give a little extra room
Data: make(Fields, 5),
}
}
// Returns the string representation from the reader and ultimately the
// formatter.
func (entry *Entry) String() (string, error) {
serialized, err := entry.Logger.Formatter.Format(entry)
if err != nil {
return "", err
}
str := string(serialized)
return str, nil
}
// Add an error as single field (using the key defined in ErrorKey) to the Entry.
func (entry *Entry) WithError(err error) *Entry {
return entry.WithField(ErrorKey, err)
}
// Add a single field to the Entry.
func (entry *Entry) WithField(key string, value interface{}) *Entry {
return entry.WithFields(Fields{key: value})
}
// Add a map of fields to the Entry.
func (entry *Entry) WithFields(fields Fields) *Entry {
data := make(Fields, len(entry.Data)+len(fields))
for k, v := range entry.Data {
data[k] = v
}
for k, v := range fields {
data[k] = v
}
return &Entry{Logger: entry.Logger, Data: data}
}
// This function is not declared with a pointer value because otherwise
// race conditions will occur when using multiple goroutines
func (entry Entry) log(level Level, msg string) {
var buffer *bytes.Buffer
entry.Time = time.Now()
entry.Level = level
entry.Message = msg
if err := entry.Logger.Hooks.Fire(level, &entry); err != nil {
entry.Logger.mu.Lock()
fmt.Fprintf(os.Stderr, "Failed to fire hook: %v\n", err)
entry.Logger.mu.Unlock()
}
buffer = bufferPool.Get().(*bytes.Buffer)
buffer.Reset()
defer bufferPool.Put(buffer)
entry.Buffer = buffer
serialized, err := entry.Logger.Formatter.Format(&entry)
entry.Buffer = nil
if err != nil {
entry.Logger.mu.Lock()
fmt.Fprintf(os.Stderr, "Failed to obtain reader, %v\n", err)
entry.Logger.mu.Unlock()
} else {
entry.Logger.mu.Lock()
_, err = entry.Logger.Out.Write(serialized)
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to write to log, %v\n", err)
}
entry.Logger.mu.Unlock()
}
// To avoid Entry#log() returning a value that only would make sense for
// panic() to use in Entry#Panic(), we avoid the allocation by checking
// directly here.
if level <= PanicLevel {
panic(&entry)
}
}
func (entry *Entry) Debug(args ...interface{}) {
if entry.Logger.Level >= DebugLevel {
entry.log(DebugLevel, fmt.Sprint(args...))
}
}
func (entry *Entry) Print(args ...interface{}) {
entry.Info(args...)
}
func (entry *Entry) Info(args ...interface{}) {
if entry.Logger.Level >= InfoLevel {
entry.log(InfoLevel, fmt.Sprint(args...))
}
}
func (entry *Entry) Warn(args ...interface{}) {
if entry.Logger.Level >= WarnLevel {
entry.log(WarnLevel, fmt.Sprint(args...))
}
}
func (entry *Entry) Warning(args ...interface{}) {
entry.Warn(args...)
}
func (entry *Entry) Error(args ...interface{}) {
if entry.Logger.Level >= ErrorLevel {
entry.log(ErrorLevel, fmt.Sprint(args...))
}
}
func (entry *Entry) Fatal(args ...interface{}) {
if entry.Logger.Level >= FatalLevel {
entry.log(FatalLevel, fmt.Sprint(args...))
}
Exit(1)
}
func (entry *Entry) Panic(args ...interface{}) {
if entry.Logger.Level >= PanicLevel {
entry.log(PanicLevel, fmt.Sprint(args...))
}
panic(fmt.Sprint(args...))
}
// Entry Printf family functions
func (entry *Entry) Debugf(format string, args ...interface{}) {
if entry.Logger.Level >= DebugLevel {
entry.Debug(fmt.Sprintf(format, args...))
}
}
func (entry *Entry) Infof(format string, args ...interface{}) {
if entry.Logger.Level >= InfoLevel {
entry.Info(fmt.Sprintf(format, args...))
}
}
func (entry *Entry) Printf(format string, args ...interface{}) {
entry.Infof(format, args...)
}
func (entry *Entry) Warnf(format string, args ...interface{}) {
if entry.Logger.Level >= WarnLevel {
entry.Warn(fmt.Sprintf(format, args...))
}
}
func (entry *Entry) Warningf(format string, args ...interface{}) {
entry.Warnf(format, args...)
}
func (entry *Entry) Errorf(format string, args ...interface{}) {
if entry.Logger.Level >= ErrorLevel {
entry.Error(fmt.Sprintf(format, args...))
}
}
func (entry *Entry) Fatalf(format string, args ...interface{}) {
if entry.Logger.Level >= FatalLevel {
entry.Fatal(fmt.Sprintf(format, args...))
}
Exit(1)
}
func (entry *Entry) Panicf(format string, args ...interface{}) {
if entry.Logger.Level >= PanicLevel {
entry.Panic(fmt.Sprintf(format, args...))
}
}
// Entry Println family functions
func (entry *Entry) Debugln(args ...interface{}) {
if entry.Logger.Level >= DebugLevel {
entry.Debug(entry.sprintlnn(args...))
}
}
func (entry *Entry) Infoln(args ...interface{}) {
if entry.Logger.Level >= InfoLevel {
entry.Info(entry.sprintlnn(args...))
}
}
func (entry *Entry) Println(args ...interface{}) {
entry.Infoln(args...)
}
func (entry *Entry) Warnln(args ...interface{}) {
if entry.Logger.Level >= WarnLevel {
entry.Warn(entry.sprintlnn(args...))
}
}
func (entry *Entry) Warningln(args ...interface{}) {
entry.Warnln(args...)
}
func (entry *Entry) Errorln(args ...interface{}) {
if entry.Logger.Level >= ErrorLevel {
entry.Error(entry.sprintlnn(args...))
}
}
func (entry *Entry) Fatalln(args ...interface{}) {
if entry.Logger.Level >= FatalLevel {
entry.Fatal(entry.sprintlnn(args...))
}
Exit(1)
}
func (entry *Entry) Panicln(args ...interface{}) {
if entry.Logger.Level >= PanicLevel {
entry.Panic(entry.sprintlnn(args...))
}
}
// Sprintlnn => Sprint no newline. This is to get the behavior of how
// fmt.Sprintln where spaces are always added between operands, regardless of
// their type. Instead of vendoring the Sprintln implementation to spare a
// string allocation, we do the simplest thing.
func (entry *Entry) sprintlnn(args ...interface{}) string {
msg := fmt.Sprintln(args...)
return msg[:len(msg)-1]
}

193
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package logrus
import (
"io"
)
var (
// std is the name of the standard logger in stdlib `log`
std = New()
)
func StandardLogger() *Logger {
return std
}
// SetOutput sets the standard logger output.
func SetOutput(out io.Writer) {
std.mu.Lock()
defer std.mu.Unlock()
std.Out = out
}
// SetFormatter sets the standard logger formatter.
func SetFormatter(formatter Formatter) {
std.mu.Lock()
defer std.mu.Unlock()
std.Formatter = formatter
}
// SetLevel sets the standard logger level.
func SetLevel(level Level) {
std.mu.Lock()
defer std.mu.Unlock()
std.Level = level
}
// GetLevel returns the standard logger level.
func GetLevel() Level {
std.mu.Lock()
defer std.mu.Unlock()
return std.Level
}
// AddHook adds a hook to the standard logger hooks.
func AddHook(hook Hook) {
std.mu.Lock()
defer std.mu.Unlock()
std.Hooks.Add(hook)
}
// WithError creates an entry from the standard logger and adds an error to it, using the value defined in ErrorKey as key.
func WithError(err error) *Entry {
return std.WithField(ErrorKey, err)
}
// WithField creates an entry from the standard logger and adds a field to
// it. If you want multiple fields, use `WithFields`.
//
// Note that it doesn't log until you call Debug, Print, Info, Warn, Fatal
// or Panic on the Entry it returns.
func WithField(key string, value interface{}) *Entry {
return std.WithField(key, value)
}
// WithFields creates an entry from the standard logger and adds multiple
// fields to it. This is simply a helper for `WithField`, invoking it
// once for each field.
//
// Note that it doesn't log until you call Debug, Print, Info, Warn, Fatal
// or Panic on the Entry it returns.
func WithFields(fields Fields) *Entry {
return std.WithFields(fields)
}
// Debug logs a message at level Debug on the standard logger.
func Debug(args ...interface{}) {
std.Debug(args...)
}
// Print logs a message at level Info on the standard logger.
func Print(args ...interface{}) {
std.Print(args...)
}
// Info logs a message at level Info on the standard logger.
func Info(args ...interface{}) {
std.Info(args...)
}
// Warn logs a message at level Warn on the standard logger.
func Warn(args ...interface{}) {
std.Warn(args...)
}
// Warning logs a message at level Warn on the standard logger.
func Warning(args ...interface{}) {
std.Warning(args...)
}
// Error logs a message at level Error on the standard logger.
func Error(args ...interface{}) {
std.Error(args...)
}
// Panic logs a message at level Panic on the standard logger.
func Panic(args ...interface{}) {
std.Panic(args...)
}
// Fatal logs a message at level Fatal on the standard logger.
func Fatal(args ...interface{}) {
std.Fatal(args...)
}
// Debugf logs a message at level Debug on the standard logger.
func Debugf(format string, args ...interface{}) {
std.Debugf(format, args...)
}
// Printf logs a message at level Info on the standard logger.
func Printf(format string, args ...interface{}) {
std.Printf(format, args...)
}
// Infof logs a message at level Info on the standard logger.
func Infof(format string, args ...interface{}) {
std.Infof(format, args...)
}
// Warnf logs a message at level Warn on the standard logger.
func Warnf(format string, args ...interface{}) {
std.Warnf(format, args...)
}
// Warningf logs a message at level Warn on the standard logger.
func Warningf(format string, args ...interface{}) {
std.Warningf(format, args...)
}
// Errorf logs a message at level Error on the standard logger.
func Errorf(format string, args ...interface{}) {
std.Errorf(format, args...)
}
// Panicf logs a message at level Panic on the standard logger.
func Panicf(format string, args ...interface{}) {
std.Panicf(format, args...)
}
// Fatalf logs a message at level Fatal on the standard logger.
func Fatalf(format string, args ...interface{}) {
std.Fatalf(format, args...)
}
// Debugln logs a message at level Debug on the standard logger.
func Debugln(args ...interface{}) {
std.Debugln(args...)
}
// Println logs a message at level Info on the standard logger.
func Println(args ...interface{}) {
std.Println(args...)
}
// Infoln logs a message at level Info on the standard logger.
func Infoln(args ...interface{}) {
std.Infoln(args...)
}
// Warnln logs a message at level Warn on the standard logger.
func Warnln(args ...interface{}) {
std.Warnln(args...)
}
// Warningln logs a message at level Warn on the standard logger.
func Warningln(args ...interface{}) {
std.Warningln(args...)
}
// Errorln logs a message at level Error on the standard logger.
func Errorln(args ...interface{}) {
std.Errorln(args...)
}
// Panicln logs a message at level Panic on the standard logger.
func Panicln(args ...interface{}) {
std.Panicln(args...)
}
// Fatalln logs a message at level Fatal on the standard logger.
func Fatalln(args ...interface{}) {
std.Fatalln(args...)
}

45
vendor/github.com/Sirupsen/logrus/formatter.go generated vendored Normal file
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package logrus
import "time"
const DefaultTimestampFormat = time.RFC3339
// The Formatter interface is used to implement a custom Formatter. It takes an
// `Entry`. It exposes all the fields, including the default ones:
//
// * `entry.Data["msg"]`. The message passed from Info, Warn, Error ..
// * `entry.Data["time"]`. The timestamp.
// * `entry.Data["level"]. The level the entry was logged at.
//
// Any additional fields added with `WithField` or `WithFields` are also in
// `entry.Data`. Format is expected to return an array of bytes which are then
// logged to `logger.Out`.
type Formatter interface {
Format(*Entry) ([]byte, error)
}
// This is to not silently overwrite `time`, `msg` and `level` fields when
// dumping it. If this code wasn't there doing:
//
// logrus.WithField("level", 1).Info("hello")
//
// Would just silently drop the user provided level. Instead with this code
// it'll logged as:
//
// {"level": "info", "fields.level": 1, "msg": "hello", "time": "..."}
//
// It's not exported because it's still using Data in an opinionated way. It's to
// avoid code duplication between the two default formatters.
func prefixFieldClashes(data Fields) {
if t, ok := data["time"]; ok {
data["fields.time"] = t
}
if m, ok := data["msg"]; ok {
data["fields.msg"] = m
}
if l, ok := data["level"]; ok {
data["fields.level"] = l
}
}

34
vendor/github.com/Sirupsen/logrus/hooks.go generated vendored Normal file
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package logrus
// A hook to be fired when logging on the logging levels returned from
// `Levels()` on your implementation of the interface. Note that this is not
// fired in a goroutine or a channel with workers, you should handle such
// functionality yourself if your call is non-blocking and you don't wish for
// the logging calls for levels returned from `Levels()` to block.
type Hook interface {
Levels() []Level
Fire(*Entry) error
}
// Internal type for storing the hooks on a logger instance.
type LevelHooks map[Level][]Hook
// Add a hook to an instance of logger. This is called with
// `log.Hooks.Add(new(MyHook))` where `MyHook` implements the `Hook` interface.
func (hooks LevelHooks) Add(hook Hook) {
for _, level := range hook.Levels() {
hooks[level] = append(hooks[level], hook)
}
}
// Fire all the hooks for the passed level. Used by `entry.log` to fire
// appropriate hooks for a log entry.
func (hooks LevelHooks) Fire(level Level, entry *Entry) error {
for _, hook := range hooks[level] {
if err := hook.Fire(entry); err != nil {
return err
}
}
return nil
}

41
vendor/github.com/Sirupsen/logrus/json_formatter.go generated vendored Normal file
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package logrus
import (
"encoding/json"
"fmt"
)
type JSONFormatter struct {
// TimestampFormat sets the format used for marshaling timestamps.
TimestampFormat string
}
func (f *JSONFormatter) Format(entry *Entry) ([]byte, error) {
data := make(Fields, len(entry.Data)+3)
for k, v := range entry.Data {
switch v := v.(type) {
case error:
// Otherwise errors are ignored by `encoding/json`
// https://github.com/Sirupsen/logrus/issues/137
data[k] = v.Error()
default:
data[k] = v
}
}
prefixFieldClashes(data)
timestampFormat := f.TimestampFormat
if timestampFormat == "" {
timestampFormat = DefaultTimestampFormat
}
data["time"] = entry.Time.Format(timestampFormat)
data["msg"] = entry.Message
data["level"] = entry.Level.String()
serialized, err := json.Marshal(data)
if err != nil {
return nil, fmt.Errorf("Failed to marshal fields to JSON, %v", err)
}
return append(serialized, '\n'), nil
}

308
vendor/github.com/Sirupsen/logrus/logger.go generated vendored Normal file
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package logrus
import (
"io"
"os"
"sync"
)
type Logger struct {
// The logs are `io.Copy`'d to this in a mutex. It's common to set this to a
// file, or leave it default which is `os.Stderr`. You can also set this to
// something more adventorous, such as logging to Kafka.
Out io.Writer
// Hooks for the logger instance. These allow firing events based on logging
// levels and log entries. For example, to send errors to an error tracking
// service, log to StatsD or dump the core on fatal errors.
Hooks LevelHooks
// All log entries pass through the formatter before logged to Out. The
// included formatters are `TextFormatter` and `JSONFormatter` for which
// TextFormatter is the default. In development (when a TTY is attached) it
// logs with colors, but to a file it wouldn't. You can easily implement your
// own that implements the `Formatter` interface, see the `README` or included
// formatters for examples.
Formatter Formatter
// The logging level the logger should log at. This is typically (and defaults
// to) `logrus.Info`, which allows Info(), Warn(), Error() and Fatal() to be
// logged. `logrus.Debug` is useful in
Level Level
// Used to sync writing to the log. Locking is enabled by Default
mu MutexWrap
// Reusable empty entry
entryPool sync.Pool
}
type MutexWrap struct {
lock sync.Mutex
disabled bool
}
func (mw *MutexWrap) Lock() {
if !mw.disabled {
mw.lock.Lock()
}
}
func (mw *MutexWrap) Unlock() {
if !mw.disabled {
mw.lock.Unlock()
}
}
func (mw *MutexWrap) Disable() {
mw.disabled = true
}
// Creates a new logger. Configuration should be set by changing `Formatter`,
// `Out` and `Hooks` directly on the default logger instance. You can also just
// instantiate your own:
//
// var log = &Logger{
// Out: os.Stderr,
// Formatter: new(JSONFormatter),
// Hooks: make(LevelHooks),
// Level: logrus.DebugLevel,
// }
//
// It's recommended to make this a global instance called `log`.
func New() *Logger {
return &Logger{
Out: os.Stderr,
Formatter: new(TextFormatter),
Hooks: make(LevelHooks),
Level: InfoLevel,
}
}
func (logger *Logger) newEntry() *Entry {
entry, ok := logger.entryPool.Get().(*Entry)
if ok {
return entry
}
return NewEntry(logger)
}
func (logger *Logger) releaseEntry(entry *Entry) {
logger.entryPool.Put(entry)
}
// Adds a field to the log entry, note that it doesn't log until you call
// Debug, Print, Info, Warn, Fatal or Panic. It only creates a log entry.
// If you want multiple fields, use `WithFields`.
func (logger *Logger) WithField(key string, value interface{}) *Entry {
entry := logger.newEntry()
defer logger.releaseEntry(entry)
return entry.WithField(key, value)
}
// Adds a struct of fields to the log entry. All it does is call `WithField` for
// each `Field`.
func (logger *Logger) WithFields(fields Fields) *Entry {
entry := logger.newEntry()
defer logger.releaseEntry(entry)
return entry.WithFields(fields)
}
// Add an error as single field to the log entry. All it does is call
// `WithError` for the given `error`.
func (logger *Logger) WithError(err error) *Entry {
entry := logger.newEntry()
defer logger.releaseEntry(entry)
return entry.WithError(err)
}
func (logger *Logger) Debugf(format string, args ...interface{}) {
if logger.Level >= DebugLevel {
entry := logger.newEntry()
entry.Debugf(format, args...)
logger.releaseEntry(entry)
}
}
func (logger *Logger) Infof(format string, args ...interface{}) {
if logger.Level >= InfoLevel {
entry := logger.newEntry()
entry.Infof(format, args...)
logger.releaseEntry(entry)
}
}
func (logger *Logger) Printf(format string, args ...interface{}) {
entry := logger.newEntry()
entry.Printf(format, args...)
logger.releaseEntry(entry)
}
func (logger *Logger) Warnf(format string, args ...interface{}) {
if logger.Level >= WarnLevel {
entry := logger.newEntry()
entry.Warnf(format, args...)
logger.releaseEntry(entry)
}
}
func (logger *Logger) Warningf(format string, args ...interface{}) {
if logger.Level >= WarnLevel {
entry := logger.newEntry()
entry.Warnf(format, args...)
logger.releaseEntry(entry)
}
}
func (logger *Logger) Errorf(format string, args ...interface{}) {
if logger.Level >= ErrorLevel {
entry := logger.newEntry()
entry.Errorf(format, args...)
logger.releaseEntry(entry)
}
}
func (logger *Logger) Fatalf(format string, args ...interface{}) {
if logger.Level >= FatalLevel {
entry := logger.newEntry()
entry.Fatalf(format, args...)
logger.releaseEntry(entry)
}
Exit(1)
}
func (logger *Logger) Panicf(format string, args ...interface{}) {
if logger.Level >= PanicLevel {
entry := logger.newEntry()
entry.Panicf(format, args...)
logger.releaseEntry(entry)
}
}
func (logger *Logger) Debug(args ...interface{}) {
if logger.Level >= DebugLevel {
entry := logger.newEntry()
entry.Debug(args...)
logger.releaseEntry(entry)
}
}
func (logger *Logger) Info(args ...interface{}) {
if logger.Level >= InfoLevel {
entry := logger.newEntry()
entry.Info(args...)
logger.releaseEntry(entry)
}
}
func (logger *Logger) Print(args ...interface{}) {
entry := logger.newEntry()
entry.Info(args...)
logger.releaseEntry(entry)
}
func (logger *Logger) Warn(args ...interface{}) {
if logger.Level >= WarnLevel {
entry := logger.newEntry()
entry.Warn(args...)
logger.releaseEntry(entry)
}
}
func (logger *Logger) Warning(args ...interface{}) {
if logger.Level >= WarnLevel {
entry := logger.newEntry()
entry.Warn(args...)
logger.releaseEntry(entry)
}
}
func (logger *Logger) Error(args ...interface{}) {
if logger.Level >= ErrorLevel {
entry := logger.newEntry()
entry.Error(args...)
logger.releaseEntry(entry)
}
}
func (logger *Logger) Fatal(args ...interface{}) {
if logger.Level >= FatalLevel {
entry := logger.newEntry()
entry.Fatal(args...)
logger.releaseEntry(entry)
}
Exit(1)
}
func (logger *Logger) Panic(args ...interface{}) {
if logger.Level >= PanicLevel {
entry := logger.newEntry()
entry.Panic(args...)
logger.releaseEntry(entry)
}
}
func (logger *Logger) Debugln(args ...interface{}) {
if logger.Level >= DebugLevel {
entry := logger.newEntry()
entry.Debugln(args...)
logger.releaseEntry(entry)
}
}
func (logger *Logger) Infoln(args ...interface{}) {
if logger.Level >= InfoLevel {
entry := logger.newEntry()
entry.Infoln(args...)
logger.releaseEntry(entry)
}
}
func (logger *Logger) Println(args ...interface{}) {
entry := logger.newEntry()
entry.Println(args...)
logger.releaseEntry(entry)
}
func (logger *Logger) Warnln(args ...interface{}) {
if logger.Level >= WarnLevel {
entry := logger.newEntry()
entry.Warnln(args...)
logger.releaseEntry(entry)
}
}
func (logger *Logger) Warningln(args ...interface{}) {
if logger.Level >= WarnLevel {
entry := logger.newEntry()
entry.Warnln(args...)
logger.releaseEntry(entry)
}
}
func (logger *Logger) Errorln(args ...interface{}) {
if logger.Level >= ErrorLevel {
entry := logger.newEntry()
entry.Errorln(args...)
logger.releaseEntry(entry)
}
}
func (logger *Logger) Fatalln(args ...interface{}) {
if logger.Level >= FatalLevel {
entry := logger.newEntry()
entry.Fatalln(args...)
logger.releaseEntry(entry)
}
Exit(1)
}
func (logger *Logger) Panicln(args ...interface{}) {
if logger.Level >= PanicLevel {
entry := logger.newEntry()
entry.Panicln(args...)
logger.releaseEntry(entry)
}
}
//When file is opened with appending mode, it's safe to
//write concurrently to a file (within 4k message on Linux).
//In these cases user can choose to disable the lock.
func (logger *Logger) SetNoLock() {
logger.mu.Disable()
}

143
vendor/github.com/Sirupsen/logrus/logrus.go generated vendored Normal file
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package logrus
import (
"fmt"
"log"
"strings"
)
// Fields type, used to pass to `WithFields`.
type Fields map[string]interface{}
// Level type
type Level uint8
// Convert the Level to a string. E.g. PanicLevel becomes "panic".
func (level Level) String() string {
switch level {
case DebugLevel:
return "debug"
case InfoLevel:
return "info"
case WarnLevel:
return "warning"
case ErrorLevel:
return "error"
case FatalLevel:
return "fatal"
case PanicLevel:
return "panic"
}
return "unknown"
}
// ParseLevel takes a string level and returns the Logrus log level constant.
func ParseLevel(lvl string) (Level, error) {
switch strings.ToLower(lvl) {
case "panic":
return PanicLevel, nil
case "fatal":
return FatalLevel, nil
case "error":
return ErrorLevel, nil
case "warn", "warning":
return WarnLevel, nil
case "info":
return InfoLevel, nil
case "debug":
return DebugLevel, nil
}
var l Level
return l, fmt.Errorf("not a valid logrus Level: %q", lvl)
}
// A constant exposing all logging levels
var AllLevels = []Level{
PanicLevel,
FatalLevel,
ErrorLevel,
WarnLevel,
InfoLevel,
DebugLevel,
}
// These are the different logging levels. You can set the logging level to log
// on your instance of logger, obtained with `logrus.New()`.
const (
// PanicLevel level, highest level of severity. Logs and then calls panic with the
// message passed to Debug, Info, ...
PanicLevel Level = iota
// FatalLevel level. Logs and then calls `os.Exit(1)`. It will exit even if the
// logging level is set to Panic.
FatalLevel
// ErrorLevel level. Logs. Used for errors that should definitely be noted.
// Commonly used for hooks to send errors to an error tracking service.
ErrorLevel
// WarnLevel level. Non-critical entries that deserve eyes.
WarnLevel
// InfoLevel level. General operational entries about what's going on inside the
// application.
InfoLevel
// DebugLevel level. Usually only enabled when debugging. Very verbose logging.
DebugLevel
)
// Won't compile if StdLogger can't be realized by a log.Logger
var (
_ StdLogger = &log.Logger{}
_ StdLogger = &Entry{}
_ StdLogger = &Logger{}
)
// StdLogger is what your logrus-enabled library should take, that way
// it'll accept a stdlib logger and a logrus logger. There's no standard
// interface, this is the closest we get, unfortunately.
type StdLogger interface {
Print(...interface{})
Printf(string, ...interface{})
Println(...interface{})
Fatal(...interface{})
Fatalf(string, ...interface{})
Fatalln(...interface{})
Panic(...interface{})
Panicf(string, ...interface{})
Panicln(...interface{})
}
// The FieldLogger interface generalizes the Entry and Logger types
type FieldLogger interface {
WithField(key string, value interface{}) *Entry
WithFields(fields Fields) *Entry
WithError(err error) *Entry
Debugf(format string, args ...interface{})
Infof(format string, args ...interface{})
Printf(format string, args ...interface{})
Warnf(format string, args ...interface{})
Warningf(format string, args ...interface{})
Errorf(format string, args ...interface{})
Fatalf(format string, args ...interface{})
Panicf(format string, args ...interface{})
Debug(args ...interface{})
Info(args ...interface{})
Print(args ...interface{})
Warn(args ...interface{})
Warning(args ...interface{})
Error(args ...interface{})
Fatal(args ...interface{})
Panic(args ...interface{})
Debugln(args ...interface{})
Infoln(args ...interface{})
Println(args ...interface{})
Warnln(args ...interface{})
Warningln(args ...interface{})
Errorln(args ...interface{})
Fatalln(args ...interface{})
Panicln(args ...interface{})
}

8
vendor/github.com/Sirupsen/logrus/terminal_appengine.go generated vendored Normal file
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// +build appengine
package logrus
// IsTerminal returns true if stderr's file descriptor is a terminal.
func IsTerminal() bool {
return true
}

10
vendor/github.com/Sirupsen/logrus/terminal_bsd.go generated vendored Normal file
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@ -0,0 +1,10 @@
// +build darwin freebsd openbsd netbsd dragonfly
// +build !appengine
package logrus
import "syscall"
const ioctlReadTermios = syscall.TIOCGETA
type Termios syscall.Termios

14
vendor/github.com/Sirupsen/logrus/terminal_linux.go generated vendored Normal file
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// Based on ssh/terminal:
// Copyright 2013 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build !appengine
package logrus
import "syscall"
const ioctlReadTermios = syscall.TCGETS
type Termios syscall.Termios

22
vendor/github.com/Sirupsen/logrus/terminal_notwindows.go generated vendored Normal file
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// Based on ssh/terminal:
// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build linux darwin freebsd openbsd netbsd dragonfly
// +build !appengine
package logrus
import (
"syscall"
"unsafe"
)
// IsTerminal returns true if stderr's file descriptor is a terminal.
func IsTerminal() bool {
fd := syscall.Stderr
var termios Termios
_, _, err := syscall.Syscall6(syscall.SYS_IOCTL, uintptr(fd), ioctlReadTermios, uintptr(unsafe.Pointer(&termios)), 0, 0, 0)
return err == 0
}

15
vendor/github.com/Sirupsen/logrus/terminal_solaris.go generated vendored Normal file
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@ -0,0 +1,15 @@
// +build solaris,!appengine
package logrus
import (
"os"
"golang.org/x/sys/unix"
)
// IsTerminal returns true if the given file descriptor is a terminal.
func IsTerminal() bool {
_, err := unix.IoctlGetTermios(int(os.Stdout.Fd()), unix.TCGETA)
return err == nil
}

27
vendor/github.com/Sirupsen/logrus/terminal_windows.go generated vendored Normal file
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// Based on ssh/terminal:
// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build windows,!appengine
package logrus
import (
"syscall"
"unsafe"
)
var kernel32 = syscall.NewLazyDLL("kernel32.dll")
var (
procGetConsoleMode = kernel32.NewProc("GetConsoleMode")
)
// IsTerminal returns true if stderr's file descriptor is a terminal.
func IsTerminal() bool {
fd := syscall.Stderr
var st uint32
r, _, e := syscall.Syscall(procGetConsoleMode.Addr(), 2, uintptr(fd), uintptr(unsafe.Pointer(&st)), 0)
return r != 0 && e == 0
}

168
vendor/github.com/Sirupsen/logrus/text_formatter.go generated vendored Normal file
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package logrus
import (
"bytes"
"fmt"
"runtime"
"sort"
"strings"
"time"
)
const (
nocolor = 0
red = 31
green = 32
yellow = 33
blue = 34
gray = 37
)
var (
baseTimestamp time.Time
isTerminal bool
)
func init() {
baseTimestamp = time.Now()
isTerminal = IsTerminal()
}
func miniTS() int {
return int(time.Since(baseTimestamp) / time.Second)
}
type TextFormatter struct {
// Set to true to bypass checking for a TTY before outputting colors.
ForceColors bool
// Force disabling colors.
DisableColors bool
// Disable timestamp logging. useful when output is redirected to logging
// system that already adds timestamps.
DisableTimestamp bool
// Enable logging the full timestamp when a TTY is attached instead of just
// the time passed since beginning of execution.
FullTimestamp bool
// TimestampFormat to use for display when a full timestamp is printed
TimestampFormat string
// The fields are sorted by default for a consistent output. For applications
// that log extremely frequently and don't use the JSON formatter this may not
// be desired.
DisableSorting bool
}
func (f *TextFormatter) Format(entry *Entry) ([]byte, error) {
var b *bytes.Buffer
var keys []string = make([]string, 0, len(entry.Data))
for k := range entry.Data {
keys = append(keys, k)
}
if !f.DisableSorting {
sort.Strings(keys)
}
if entry.Buffer != nil {
b = entry.Buffer
} else {
b = &bytes.Buffer{}
}
prefixFieldClashes(entry.Data)
isColorTerminal := isTerminal && (runtime.GOOS != "windows")
isColored := (f.ForceColors || isColorTerminal) && !f.DisableColors
timestampFormat := f.TimestampFormat
if timestampFormat == "" {
timestampFormat = DefaultTimestampFormat
}
if isColored {
f.printColored(b, entry, keys, timestampFormat)
} else {
if !f.DisableTimestamp {
f.appendKeyValue(b, "time", entry.Time.Format(timestampFormat))
}
f.appendKeyValue(b, "level", entry.Level.String())
if entry.Message != "" {
f.appendKeyValue(b, "msg", entry.Message)
}
for _, key := range keys {
f.appendKeyValue(b, key, entry.Data[key])
}
}
b.WriteByte('\n')
return b.Bytes(), nil
}
func (f *TextFormatter) printColored(b *bytes.Buffer, entry *Entry, keys []string, timestampFormat string) {
var levelColor int
switch entry.Level {
case DebugLevel:
levelColor = gray
case WarnLevel:
levelColor = yellow
case ErrorLevel, FatalLevel, PanicLevel:
levelColor = red
default:
levelColor = blue
}
levelText := strings.ToUpper(entry.Level.String())[0:4]
if !f.FullTimestamp {
fmt.Fprintf(b, "\x1b[%dm%s\x1b[0m[%04d] %-44s ", levelColor, levelText, miniTS(), entry.Message)
} else {
fmt.Fprintf(b, "\x1b[%dm%s\x1b[0m[%s] %-44s ", levelColor, levelText, entry.Time.Format(timestampFormat), entry.Message)
}
for _, k := range keys {
v := entry.Data[k]
fmt.Fprintf(b, " \x1b[%dm%s\x1b[0m=", levelColor, k)
f.appendValue(b, v)
}
}
func needsQuoting(text string) bool {
for _, ch := range text {
if !((ch >= 'a' && ch <= 'z') ||
(ch >= 'A' && ch <= 'Z') ||
(ch >= '0' && ch <= '9') ||
ch == '-' || ch == '.') {
return true
}
}
return false
}
func (f *TextFormatter) appendKeyValue(b *bytes.Buffer, key string, value interface{}) {
b.WriteString(key)
b.WriteByte('=')
f.appendValue(b, value)
b.WriteByte(' ')
}
func (f *TextFormatter) appendValue(b *bytes.Buffer, value interface{}) {
switch value := value.(type) {
case string:
if !needsQuoting(value) {
b.WriteString(value)
} else {
fmt.Fprintf(b, "%q", value)
}
case error:
errmsg := value.Error()
if !needsQuoting(errmsg) {
b.WriteString(errmsg)
} else {
fmt.Fprintf(b, "%q", errmsg)
}
default:
fmt.Fprint(b, value)
}
}

53
vendor/github.com/Sirupsen/logrus/writer.go generated vendored Normal file
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@ -0,0 +1,53 @@
package logrus
import (
"bufio"
"io"
"runtime"
)
func (logger *Logger) Writer() *io.PipeWriter {
return logger.WriterLevel(InfoLevel)
}
func (logger *Logger) WriterLevel(level Level) *io.PipeWriter {
reader, writer := io.Pipe()
var printFunc func(args ...interface{})
switch level {
case DebugLevel:
printFunc = logger.Debug
case InfoLevel:
printFunc = logger.Info
case WarnLevel:
printFunc = logger.Warn
case ErrorLevel:
printFunc = logger.Error
case FatalLevel:
printFunc = logger.Fatal
case PanicLevel:
printFunc = logger.Panic
default:
printFunc = logger.Print
}
go logger.writerScanner(reader, printFunc)
runtime.SetFinalizer(writer, writerFinalizer)
return writer
}
func (logger *Logger) writerScanner(reader *io.PipeReader, printFunc func(args ...interface{})) {
scanner := bufio.NewScanner(reader)
for scanner.Scan() {
printFunc(scanner.Text())
}
if err := scanner.Err(); err != nil {
logger.Errorf("Error while reading from Writer: %s", err)
}
reader.Close()
}
func writerFinalizer(writer *io.PipeWriter) {
writer.Close()
}

191
vendor/github.com/containerd/containerd/LICENSE.code generated vendored Normal file
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@ -0,0 +1,191 @@
Apache License
Version 2.0, January 2004
https://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
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"License" shall mean the terms and conditions for use, reproduction,
and distribution as defined by Sections 1 through 9 of this document.
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outstanding shares, or (iii) beneficial ownership of such entity.
"You" (or "Your") shall mean an individual or Legal Entity
exercising permissions granted by this License.
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not limited to compiled object code, generated documentation,
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unless required by applicable law (such as deliberate and grossly
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END OF TERMS AND CONDITIONS
Copyright 2013-2016 Docker, Inc.
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
https://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.

425
vendor/github.com/containerd/containerd/LICENSE.docs generated vendored Normal file
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@ -0,0 +1,425 @@
Attribution-ShareAlike 4.0 International
=======================================================================
Creative Commons Corporation ("Creative Commons") is not a law firm and
does not provide legal services or legal advice. Distribution of
Creative Commons public licenses does not create a lawyer-client or
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Using Creative Commons Public Licenses
Creative Commons public licenses provide a standard set of terms and
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=======================================================================
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By exercising the Licensed Rights (defined below), You accept and agree
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b. ShareAlike.
In addition to the conditions in Section 3(a), if You Share
Adapted Material You produce, the following conditions also apply.
1. The Adapter's License You apply must be a Creative Commons
license with the same License Elements, this version or
later, or a BY-SA Compatible License.
2. You must include the text of, or the URI or hyperlink to, the
Adapter's License You apply. You may satisfy this condition
in any reasonable manner based on the medium, means, and
context in which You Share Adapted Material.
3. You may not offer or impose any additional or different terms
or conditions on, or apply any Effective Technological
Measures to, Adapted Material that restrict exercise of the
rights granted under the Adapter's License You apply.
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Where the Licensed Rights include Sui Generis Database Rights that
apply to Your use of the Licensed Material:
a. for the avoidance of doubt, Section 2(a)(1) grants You the right
to extract, reuse, reproduce, and Share all or a substantial
portion of the contents of the database;
b. if You include all or a substantial portion of the database
contents in a database in which You have Sui Generis Database
Rights, then the database in which You have Sui Generis Database
Rights (but not its individual contents) is Adapted Material,
including for purposes of Section 3(b); and
c. You must comply with the conditions in Section 3(a) if You Share
all or a substantial portion of the contents of the database.
For the avoidance of doubt, this Section 4 supplements and does not
replace Your obligations under this Public License where the Licensed
Rights include other Copyright and Similar Rights.
Section 5 -- Disclaimer of Warranties and Limitation of Liability.
a. UNLESS OTHERWISE SEPARATELY UNDERTAKEN BY THE LICENSOR, TO THE
EXTENT POSSIBLE, THE LICENSOR OFFERS THE LICENSED MATERIAL AS-IS
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b. TO THE EXTENT POSSIBLE, IN NO EVENT WILL THE LICENSOR BE LIABLE
TO YOU ON ANY LEGAL THEORY (INCLUDING, WITHOUT LIMITATION,
NEGLIGENCE) OR OTHERWISE FOR ANY DIRECT, SPECIAL, INDIRECT,
INCIDENTAL, CONSEQUENTIAL, PUNITIVE, EXEMPLARY, OR OTHER LOSSES,
COSTS, EXPENSES, OR DAMAGES ARISING OUT OF THIS PUBLIC LICENSE OR
USE OF THE LICENSED MATERIAL, EVEN IF THE LICENSOR HAS BEEN
ADVISED OF THE POSSIBILITY OF SUCH LOSSES, COSTS, EXPENSES, OR
DAMAGES. WHERE A LIMITATION OF LIABILITY IS NOT ALLOWED IN FULL OR
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c. The disclaimer of warranties and limitation of liability provided
above shall be interpreted in a manner that, to the extent
possible, most closely approximates an absolute disclaimer and
waiver of all liability.
Section 6 -- Term and Termination.
a. This Public License applies for the term of the Copyright and
Similar Rights licensed here. However, if You fail to comply with
this Public License, then Your rights under this Public License
terminate automatically.
b. Where Your right to use the Licensed Material has terminated under
Section 6(a), it reinstates:
1. automatically as of the date the violation is cured, provided
it is cured within 30 days of Your discovery of the
violation; or
2. upon express reinstatement by the Licensor.
For the avoidance of doubt, this Section 6(b) does not affect any
right the Licensor may have to seek remedies for Your violations
of this Public License.
c. For the avoidance of doubt, the Licensor may also offer the
Licensed Material under separate terms or conditions or stop
distributing the Licensed Material at any time; however, doing so
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d. Sections 1, 5, 6, 7, and 8 survive termination of this Public
License.
Section 7 -- Other Terms and Conditions.
a. The Licensor shall not be bound by any additional or different
terms or conditions communicated by You unless expressly agreed.
b. Any arrangements, understandings, or agreements regarding the
Licensed Material not stated herein are separate from and
independent of the terms and conditions of this Public License.
Section 8 -- Interpretation.
a. For the avoidance of doubt, this Public License does not, and
shall not be interpreted to, reduce, limit, restrict, or impose
conditions on any use of the Licensed Material that could lawfully
be made without permission under this Public License.
b. To the extent possible, if any provision of this Public License is
deemed unenforceable, it shall be automatically reformed to the
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cannot be reformed, it shall be severed from this Public License
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c. No term or condition of this Public License will be waived and no
failure to comply consented to unless expressly agreed to by the
Licensor.
d. Nothing in this Public License constitutes or may be interpreted
as a limitation upon, or waiver of, any privileges and immunities
that apply to the Licensor or You, including from the legal
processes of any jurisdiction or authority.
=======================================================================
Creative Commons is not a party to its public licenses.
Notwithstanding, Creative Commons may elect to apply one of its public
licenses to material it publishes and in those instances will be
considered the "Licensor." Except for the limited purpose of indicating
that material is shared under a Creative Commons public license or as
otherwise permitted by the Creative Commons policies published at
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Creative Commons may be contacted at creativecommons.org.

16
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Docker
Copyright 2012-2015 Docker, Inc.
This product includes software developed at Docker, Inc. (https://www.docker.com).
The following is courtesy of our legal counsel:
Use and transfer of Docker may be subject to certain restrictions by the
United States and other governments.
It is your responsibility to ensure that your use and/or transfer does not
violate applicable laws.
For more information, please see https://www.bis.doc.gov
See also https://www.apache.org/dev/crypto.html and/or seek legal counsel.

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![banner](/docs/images/containerd-dark.png?raw=true)
[![Build Status](https://travis-ci.org/containerd/containerd.svg?branch=master)](https://travis-ci.org/containerd/containerd)
[![FOSSA Status](https://app.fossa.io/api/projects/git%2Bhttps%3A%2F%2Fgithub.com%2Fcontainerd%2Fcontainerd.svg?type=shield)](https://app.fossa.io/projects/git%2Bhttps%3A%2F%2Fgithub.com%2Fcontainerd%2Fcontainerd?ref=badge_shield)
containerd is an industry-standard container runtime with an emphasis on simplicity, robustness and portability. It is available as a daemon for Linux and Windows, which can manage the complete container lifecycle of its host system: image transfer and storage, container execution and supervision, low-level storage and network attachments, etc..
containerd is designed to be embedded into a larger system, rather than being used directly by developers or end-users.
### State of the Project
containerd currently has two active branches.
There is a [v0.2.x](https://github.com/containerd/containerd/tree/v0.2.x) branch for the current release of containerd that is being consumed by Docker and others and the master branch is the development branch for the 1.0 roadmap and feature set.
Any PR or issue that is intended for the current v0.2.x release should be tagged with the same `v0.2.x` tag.
### Communication
For async communication and long running discussions please use issues and pull requests on the github repo.
This will be the best place to discuss design and implementation.
For sync communication we have a community slack with a #containerd channel that everyone is welcome to join and chat about development.
**Slack:** https://dockr.ly/community
### Developer Quick-Start
To build the daemon and `ctr` simple test client, the following build system dependencies are required:
* Go 1.8.x or above (requires 1.8 due to use of golang plugin(s))
* Protoc 3.x compiler and headers (download at the [Google protobuf releases page](https://github.com/google/protobuf/releases))
* Btrfs headers and libraries for your distribution. Note that building the btrfs driver can be disabled via build tag removing this dependency.
For proper results, install the `protoc` release into `/usr/local` on your build system. For example, the following commands will download and install the 3.1.0 release for a 64-bit Linux host:
```
$ wget -c https://github.com/google/protobuf/releases/download/v3.1.0/protoc-3.1.0-linux-x86_64.zip
$ sudo unzip protoc-3.1.0-linux-x86_64.zip -d /usr/local
```
With the required dependencies installed, the `Makefile` target named **binaries** will compile the `ctr` and `containerd` binaries and place them in the `bin/` directory. Using `sudo make install` will place the binaries in `/usr/local/bin`. When making any changes to the gRPC API, `make generate` will use the installed `protoc` compiler to regenerate the API generated code packages.
> *Note*: A build tag is currently available to disable building the btrfs snapshot driver.
> Adding `BUILDTAGS=no_btrfs` to your environment before calling the **binaries**
> Makefile target will disable the btrfs driver within the containerd Go build.
Vendoring of external imports uses the [`vndr` tool](https://github.com/LK4D4/vndr) which uses a simple config file, `vendor.conf`, to provide the URL and version or hash details for each vendored import. After modifying `vendor.conf` run the `vndr` tool to update the `vendor/` directory contents. Combining the `vendor.conf` update with the changeset in `vendor/` after running `vndr` should become a single commit for a PR which relies on vendored updates.
Please refer to [RUNC.md](/RUNC.md) for the currently supported version of `runc` that is used by containerd.
## Features
* OCI Image Spec support
* OCI Runtime Spec support
* Image push and pull support
* Container runtime and lifecycle support
* Management of network namespaces containers to join existing namespaces
* Multi-tenant supported with CAS storage for global images
## Scope and Principles
Having a clearly defined scope of a project is important for ensuring consistency and focus.
These following criteria will be used when reviewing pull requests, features, and changes for the project before being accepted.
### Components
Components should not have tight dependencies on each other so that they are able to be used independently.
The APIs for images and containers should be designed in a way that when used together the components have a natural flow but still be useful independently.
An example for this design can be seen with the overlay filesystems and the container execution layer.
The execution layer and overlay filesystems can be used independently but if you were to use both, they share a common `Mount` struct that the filesystems produce and the execution layer consumes.
### Primitives
containerd should expose primitives to solve problems instead of building high level abstractions in the API.
A common example of this is how build would be implemented.
Instead of having a build API in containerd we should expose the lower level primitives that allow things required in build to work.
Breaking up the filesystem APIs to allow snapshots, copy functionality, and mounts allow people implementing build at the higher levels more flexibility.
### Extensibility and Defaults
For the various components in containerd there should be defined extension points where implementations can be swapped for alternatives.
The best example of this is that containerd will use `runc` from OCI as the default runtime in the execution layer but other runtimes conforming to the OCI Runtime specification they can be easily added to containerd.
containerd will come with a default implementation for the various components.
These defaults will be chosen by the maintainers of the project and should not change unless better tech for that component comes out.
Additional implementations will not be accepted into the core repository and should be developed in a separate repository not maintained by the containerd maintainers.
### Releases
containerd will be released with a 1.0 when feature complete and this version will be supported for 1 year with security and bug fixes applied and released.
The upgrade path for containerd is that the 0.0.x patch releases are always backward compatible with its major and minor version.
Minor (0.x.0) version will always be compatible with the previous minor release. i.e. 1.2.0 is backwards compatible with 1.1.0 and 1.1.0 is compatible with 1.0.0.
There is no compatibility guarantees with upgrades from two minor releases. i.e. 1.0.0 to 1.2.0.
There are not backwards compatibility guarantees with upgrades to major versions. i.e 1.0.0 to 2.0.0.
Each major version will be supported for 1 year with bug fixes and security patches.
### Scope
The following table specifies the various components of containerd and general features of container runtimes.
The table specifies whether or not the feature/component is in or out of scope.
| Name | Description | In/Out | Reason |
|------------------------------|--------------------------------------------------------------------------------------------------------|--------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| execution | Provide an extensible execution layer for executing a container | in | Create,start, stop pause, resume exec, signal, delete |
| cow filesystem | Built in functionality for overlay, aufs, and other copy on write filesystems for containers | in | |
| distribution | Having the ability to push and pull images as well as operations on images as a first class API object | in | containerd will fully support the management and retrieval of images |
| metrics | container-level metrics, cgroup stats, and OOM events | in |
| networking | creation and management of network interfaces | out | Networking will be handled and provided to containerd via higher level systems. |
| build | Building images as a first class API | out | Build is a higher level tooling feature and can be implemented in many different ways on top of containerd |
| volumes | Volume management for external data | out | The API supports mounts, binds, etc where all volumes type systems can be built on top of containerd. |
| logging | Persisting container logs | out | Logging can be build on top of containerd because the container’s STDIO will be provided to the clients and they can persist any way they see fit. There is no io copying of container STDIO in containerd. |
containerd is scoped to a single host and makes assumptions based on that fact.
It can be used to build things like a node agent that launches containers but does not have any concepts of a distributed system.
containerd is designed to be embedded into a larger system, hence it only includes a barebone CLI (`ctr`) specifically for development and debugging purpose, with no mandate to be human-friendly, and no guarantee of interface stability over time.
Also things like service discovery are out of scope even though networking is in scope.
containerd should provide the primitives to create, add, remove, or manage network interfaces and network namespaces for a container but IP allocation, discovery, and DNS should be handled at higher layers.
### How is the scope changed?
The scope of this project is a whitelist.
If it's not mentioned as being in scope, it is out of scope.
For the scope of this project to change it requires a 100% vote from all maintainers of the project.
### Development reports.
Weekly summary on the progress and what is being worked on.
https://github.com/containerd/containerd/tree/master/reports
## Copyright and license
Copyright © 2016 Docker, Inc. All rights reserved, except as follows. Code
is released under the Apache 2.0 license. The README.md file, and files in the
"docs" folder are licensed under the Creative Commons Attribution 4.0
International License under the terms and conditions set forth in the file
"LICENSE.docs". You may obtain a duplicate copy of the same license, titled
CC-BY-SA-4.0, at http://creativecommons.org/licenses/by/4.0/.

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vendor/github.com/containerd/containerd/content/content.go generated vendored Normal file
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package content
import (
"context"
"io"
"sync"
"time"
"github.com/opencontainers/go-digest"
"github.com/pkg/errors"
)
var (
// ErrNotFound is returned when an item is not found.
//
// Use IsNotFound(err) to detect this condition.
ErrNotFound = errors.New("content: not found")
// ErrExists is returned when something exists when it may not be expected.
//
// Use IsExists(err) to detect this condition.
ErrExists = errors.New("content: exists")
bufPool = sync.Pool{
New: func() interface{} {
return make([]byte, 1<<20)
},
}
)
type Provider interface {
Reader(ctx context.Context, dgst digest.Digest) (io.ReadCloser, error)
}
type Ingester interface {
Writer(ctx context.Context, ref string, size int64, expected digest.Digest) (Writer, error)
}
// TODO(stevvooe): Consider a very different name for this struct. Info is way
// to general. It also reads very weird in certain context, like pluralization.
type Info struct {
Digest digest.Digest
Size int64
CommittedAt time.Time
}
type Status struct {
Ref string
Offset int64
Total int64
Expected digest.Digest
StartedAt time.Time
UpdatedAt time.Time
}
// WalkFunc defines the callback for a blob walk.
type WalkFunc func(Info) error
// Manager provides methods for inspecting, listing and removing content.
type Manager interface {
// Info will return metadata about content available in the content store.
//
// If the content is not present, ErrNotFound will be returned.
Info(ctx context.Context, dgst digest.Digest) (Info, error)
// Walk will call fn for each item in the content store.
Walk(ctx context.Context, fn WalkFunc) error
// Delete removes the content from the store.
Delete(ctx context.Context, dgst digest.Digest) error
// Status returns the status of any active ingestions whose ref match the
// provided regular expression. If empty, all active ingestions will be
// returned.
//
// TODO(stevvooe): Status may be slighly out of place here. If this remains
// here, we should remove Manager and just define these on store.
Status(ctx context.Context, re string) ([]Status, error)
// Abort completely cancels the ingest operation targeted by ref.
//
// TODO(stevvooe): Same consideration as above. This should really be
// restricted to an ingest management interface.
Abort(ctx context.Context, ref string) error
}
type Writer interface {
io.WriteCloser
Status() (Status, error)
Digest() digest.Digest
Commit(size int64, expected digest.Digest) error
Truncate(size int64) error
}
// Store combines the methods of content-oriented interfaces into a set that
// are commonly provided by complete implementations.
type Store interface {
Manager
Ingester
Provider
}
func IsNotFound(err error) bool {
return errors.Cause(err) == ErrNotFound
}
func IsExists(err error) bool {
return errors.Cause(err) == ErrExists
}

116
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package content
import (
"context"
"fmt"
"io"
"io/ioutil"
"github.com/opencontainers/go-digest"
"github.com/pkg/errors"
)
// ReadBlob retrieves the entire contents of the blob from the provider.
//
// Avoid using this for large blobs, such as layers.
func ReadBlob(ctx context.Context, provider Provider, dgst digest.Digest) ([]byte, error) {
rc, err := provider.Reader(ctx, dgst)
if err != nil {
return nil, err
}
defer rc.Close()
return ioutil.ReadAll(rc)
}
// WriteBlob writes data with the expected digest into the content store. If
// expected already exists, the method returns immediately and the reader will
// not be consumed.
//
// This is useful when the digest and size are known beforehand.
//
// Copy is buffered, so no need to wrap reader in buffered io.
func WriteBlob(ctx context.Context, cs Ingester, ref string, r io.Reader, size int64, expected digest.Digest) error {
cw, err := cs.Writer(ctx, ref, size, expected)
if err != nil {
if !IsExists(err) {
return err
}
return nil // all ready present
}
defer cw.Close()
ws, err := cw.Status()
if err != nil {
return err
}
if ws.Offset > 0 {
r, err = seekReader(r, ws.Offset, size)
if err != nil {
if !isUnseekable(err) {
return errors.Wrapf(err, "unabled to resume write to %v", ref)
}
// reader is unseekable, try to move the writer back to the start.
if err := cw.Truncate(0); err != nil {
return errors.Wrapf(err, "content writer truncate failed")
}
}
}
buf := bufPool.Get().([]byte)
defer bufPool.Put(buf)
if _, err := io.CopyBuffer(cw, r, buf); err != nil {
return err
}
if err := cw.Commit(size, expected); err != nil {
if !IsExists(err) {
return errors.Wrapf(err, "failed commit on ref %q", ref)
}
}
return nil
}
var errUnseekable = errors.New("seek not supported")
func isUnseekable(err error) bool {
return errors.Cause(err) == errUnseekable
}
// seekReader attempts to seek the reader to the given offset, either by
// resolving `io.Seeker` or by detecting `io.ReaderAt`.
func seekReader(r io.Reader, offset, size int64) (io.Reader, error) {
// attempt to resolve r as a seeker and setup the offset.
seeker, ok := r.(io.Seeker)
if ok {
nn, err := seeker.Seek(offset, io.SeekStart)
if nn != offset {
return nil, fmt.Errorf("failed to seek to offset %v", offset)
}
if err != nil {
return nil, err
}
return r, nil
}
// ok, let's try io.ReaderAt!
readerAt, ok := r.(io.ReaderAt)
if ok && size > offset {
sr := io.NewSectionReader(readerAt, offset, size)
return sr, nil
}
return r, errors.Wrapf(errUnseekable, "seek to offset %v failed", offset)
}
func readFileString(path string) (string, error) {
p, err := ioutil.ReadFile(path)
return string(p), err
}

56
vendor/github.com/containerd/containerd/content/locks.go generated vendored Normal file
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package content
import (
"sync"
"github.com/nightlyone/lockfile"
"github.com/pkg/errors"
)
// In addition to providing inter-process locks for content ingest, we also
// define a global in process lock to prevent two goroutines writing to the
// same file.
//
// This is pretty unsophisticated for now. In the future, we'd probably like to
// have more information about who is holding which locks, as well as better
// error reporting.
var (
errLocked = errors.New("key is locked")
// locks lets us lock in process, as well as output of process.
locks = map[lockfile.Lockfile]struct{}{}
locksMu sync.Mutex
)
func tryLock(lock lockfile.Lockfile) error {
locksMu.Lock()
defer locksMu.Unlock()
if _, ok := locks[lock]; ok {
return errLocked
}
if err := lock.TryLock(); err != nil {
if errors.Cause(err) == lockfile.ErrBusy {
return errLocked
}
return errors.Wrapf(err, "lock.TryLock() encountered an error")
}
locks[lock] = struct{}{}
return nil
}
func unlock(lock lockfile.Lockfile) error {
locksMu.Lock()
defer locksMu.Unlock()
if _, ok := locks[lock]; !ok {
return nil
}
delete(locks, lock)
return lock.Unlock()
}

373
vendor/github.com/containerd/containerd/content/store.go generated vendored Normal file
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package content
import (
"context"
"fmt"
"io"
"io/ioutil"
"os"
"path/filepath"
"regexp"
"strconv"
"time"
"github.com/containerd/containerd/log"
"github.com/nightlyone/lockfile"
digest "github.com/opencontainers/go-digest"
"github.com/pkg/errors"
)
// Store is digest-keyed store for content. All data written into the store is
// stored under a verifiable digest.
//
// Store can generally support multi-reader, single-writer ingest of data,
// including resumable ingest.
type store struct {
root string
}
func NewStore(root string) (Store, error) {
if err := os.MkdirAll(filepath.Join(root, "ingest"), 0777); err != nil && !os.IsExist(err) {
return nil, err
}
return &store{
root: root,
}, nil
}
func (s *store) Info(ctx context.Context, dgst digest.Digest) (Info, error) {
p := s.blobPath(dgst)
fi, err := os.Stat(p)
if err != nil {
if os.IsNotExist(err) {
err = ErrNotFound
}
return Info{}, err
}
return s.info(dgst, fi), nil
}
func (s *store) info(dgst digest.Digest, fi os.FileInfo) Info {
return Info{
Digest: dgst,
Size: fi.Size(),
CommittedAt: fi.ModTime(),
}
}
// Open returns an io.ReadCloser for the blob.
//
// TODO(stevvooe): This would work much better as an io.ReaderAt in practice.
// Right now, we are doing type assertion to tease that out, but it won't scale
// well.
func (s *store) Reader(ctx context.Context, dgst digest.Digest) (io.ReadCloser, error) {
fp, err := os.Open(s.blobPath(dgst))
if err != nil {
if os.IsNotExist(err) {
err = ErrNotFound
}
return nil, err
}
return fp, nil
}
// Delete removes a blob by its digest.
//
// While this is safe to do concurrently, safe exist-removal logic must hold
// some global lock on the store.
func (cs *store) Delete(ctx context.Context, dgst digest.Digest) error {
if err := os.RemoveAll(cs.blobPath(dgst)); err != nil {
if !os.IsNotExist(err) {
return err
}
return ErrNotFound
}
return nil
}
// TODO(stevvooe): Allow querying the set of blobs in the blob store.
func (cs *store) Walk(ctx context.Context, fn WalkFunc) error {
root := filepath.Join(cs.root, "blobs")
var alg digest.Algorithm
return filepath.Walk(root, func(path string, fi os.FileInfo, err error) error {
if err != nil {
return err
}
if !fi.IsDir() && !alg.Available() {
return nil
}
// TODO(stevvooe): There are few more cases with subdirs that should be
// handled in case the layout gets corrupted. This isn't strict enough
// an may spew bad data.
if path == root {
return nil
}
if filepath.Dir(path) == root {
alg = digest.Algorithm(filepath.Base(path))
if !alg.Available() {
alg = ""
return filepath.SkipDir
}
// descending into a hash directory
return nil
}
dgst := digest.NewDigestFromHex(alg.String(), filepath.Base(path))
if err := dgst.Validate(); err != nil {
// log error but don't report
log.L.WithError(err).WithField("path", path).Error("invalid digest for blob path")
// if we see this, it could mean some sort of corruption of the
// store or extra paths not expected previously.
}
return fn(cs.info(dgst, fi))
})
}
func (s *store) Status(ctx context.Context, re string) ([]Status, error) {
fp, err := os.Open(filepath.Join(s.root, "ingest"))
if err != nil {
return nil, err
}
defer fp.Close()
fis, err := fp.Readdir(-1)
if err != nil {
return nil, err
}
rec, err := regexp.Compile(re)
if err != nil {
return nil, err
}
var active []Status
for _, fi := range fis {
p := filepath.Join(s.root, "ingest", fi.Name())
stat, err := s.status(p)
if err != nil {
if !os.IsNotExist(err) {
return nil, err
}
// TODO(stevvooe): This is a common error if uploads are being
// completed while making this listing. Need to consider taking a
// lock on the whole store to coordinate this aspect.
//
// Another option is to cleanup downloads asynchronously and
// coordinate this method with the cleanup process.
//
// For now, we just skip them, as they really don't exist.
continue
}
if !rec.MatchString(stat.Ref) {
continue
}
active = append(active, stat)
}
return active, nil
}
// status works like stat above except uses the path to the ingest.
func (s *store) status(ingestPath string) (Status, error) {
dp := filepath.Join(ingestPath, "data")
fi, err := os.Stat(dp)
if err != nil {
return Status{}, err
}
ref, err := readFileString(filepath.Join(ingestPath, "ref"))
if err != nil {
return Status{}, err
}
return Status{
Ref: ref,
Offset: fi.Size(),
Total: s.total(ingestPath),
UpdatedAt: fi.ModTime(),
StartedAt: getStartTime(fi),
}, nil
}
// total attempts to resolve the total expected size for the write.
func (s *store) total(ingestPath string) int64 {
totalS, err := readFileString(filepath.Join(ingestPath, "total"))
if err != nil {
return 0
}
total, err := strconv.ParseInt(totalS, 10, 64)
if err != nil {
// represents a corrupted file, should probably remove.
return 0
}
return total
}
// Writer begins or resumes the active writer identified by ref. If the writer
// is already in use, an error is returned. Only one writer may be in use per
// ref at a time.
//
// The argument `ref` is used to uniquely identify a long-lived writer transaction.
func (s *store) Writer(ctx context.Context, ref string, total int64, expected digest.Digest) (Writer, error) {
// TODO(stevvooe): Need to actually store and handle expected here. We have
// code in the service that shouldn't be dealing with this.
path, refp, data, lock, err := s.ingestPaths(ref)
if err != nil {
return nil, err
}
if err := tryLock(lock); err != nil {
if !os.IsNotExist(errors.Cause(err)) {
return nil, errors.Wrapf(err, "locking %v failed", ref)
}
// if it doesn't exist, we'll make it so below!
}
var (
digester = digest.Canonical.Digester()
offset int64
startedAt time.Time
updatedAt time.Time
)
// ensure that the ingest path has been created.
if err := os.Mkdir(path, 0755); err != nil {
if !os.IsExist(err) {
return nil, err
}
status, err := s.status(path)
if err != nil {
return nil, errors.Wrap(err, "failed reading status of resume write")
}
if ref != status.Ref {
// NOTE(stevvooe): This is fairly catastrophic. Either we have some
// layout corruption or a hash collision for the ref key.
return nil, errors.Wrapf(err, "ref key does not match: %v != %v", ref, status.Ref)
}
if total > 0 && status.Total > 0 && total != status.Total {
return nil, errors.Errorf("provided total differs from status: %v != %v", total, status.Total)
}
// slow slow slow!!, send to goroutine or use resumable hashes
fp, err := os.Open(data)
if err != nil {
return nil, err
}
defer fp.Close()
p := bufPool.Get().([]byte)
defer bufPool.Put(p)
offset, err = io.CopyBuffer(digester.Hash(), fp, p)
if err != nil {
return nil, err
}
updatedAt = status.UpdatedAt
startedAt = status.StartedAt
total = status.Total
} else {
// the ingest is new, we need to setup the target location.
// write the ref to a file for later use
if err := ioutil.WriteFile(refp, []byte(ref), 0666); err != nil {
return nil, err
}
if total > 0 {
if err := ioutil.WriteFile(filepath.Join(path, "total"), []byte(fmt.Sprint(total)), 0666); err != nil {
return nil, err
}
}
startedAt = time.Now()
updatedAt = startedAt
}
fp, err := os.OpenFile(data, os.O_WRONLY|os.O_CREATE, 0666)
if err != nil {
return nil, errors.Wrap(err, "failed to open data file")
}
return &writer{
s: s,
fp: fp,
lock: lock,
ref: ref,
path: path,
offset: offset,
total: total,
digester: digester,
startedAt: startedAt,
updatedAt: updatedAt,
}, nil
}
// Abort an active transaction keyed by ref. If the ingest is active, it will
// be cancelled. Any resources associated with the ingest will be cleaned.
func (s *store) Abort(ctx context.Context, ref string) error {
root := s.ingestRoot(ref)
if err := os.RemoveAll(root); err != nil {
if os.IsNotExist(err) {
return ErrNotFound
}
return err
}
return nil
}
func (cs *store) blobPath(dgst digest.Digest) string {
return filepath.Join(cs.root, "blobs", dgst.Algorithm().String(), dgst.Hex())
}
func (s *store) ingestRoot(ref string) string {
dgst := digest.FromString(ref)
return filepath.Join(s.root, "ingest", dgst.Hex())
}
// ingestPaths are returned, including the lockfile. The paths are the following:
//
// - root: entire ingest directory
// - ref: name of the starting ref, must be unique
// - data: file where data is written
// - lock: lock file location
//
func (s *store) ingestPaths(ref string) (string, string, string, lockfile.Lockfile, error) {
var (
fp = s.ingestRoot(ref)
rp = filepath.Join(fp, "ref")
lp = filepath.Join(fp, "lock")
dp = filepath.Join(fp, "data")
)
lock, err := lockfile.New(lp)
if err != nil {
return "", "", "", "", errors.Wrapf(err, "error creating lockfile %v", lp)
}
return fp, rp, dp, lock, nil
}

15
vendor/github.com/containerd/containerd/content/store_linux.go generated vendored Normal file
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@ -0,0 +1,15 @@
package content
import (
"os"
"syscall"
"time"
)
func getStartTime(fi os.FileInfo) time.Time {
if st, ok := fi.Sys().(*syscall.Stat_t); ok {
return time.Unix(int64(st.Ctim.Sec), int64(st.Ctim.Nsec))
}
return fi.ModTime()
}

17
vendor/github.com/containerd/containerd/content/store_unix.go generated vendored Normal file
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@ -0,0 +1,17 @@
// +build darwin freebsd
package content
import (
"os"
"syscall"
"time"
)
func getStartTime(fi os.FileInfo) time.Time {
if st, ok := fi.Sys().(*syscall.Stat_t); ok {
return time.Unix(int64(st.Ctimespec.Sec), int64(st.Ctimespec.Nsec))
}
return fi.ModTime()
}

10
vendor/github.com/containerd/containerd/content/store_windows.go generated vendored Normal file
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@ -0,0 +1,10 @@
package content
import (
"os"
"time"
)
func getStartTime(fi os.FileInfo) time.Time {
return fi.ModTime()
}

144
vendor/github.com/containerd/containerd/content/writer.go generated vendored Normal file
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@ -0,0 +1,144 @@
package content
import (
"os"
"path/filepath"
"time"
"github.com/containerd/containerd/log"
"github.com/nightlyone/lockfile"
"github.com/opencontainers/go-digest"
"github.com/pkg/errors"
)
// writer represents a write transaction against the blob store.
type writer struct {
s *store
fp *os.File // opened data file
lock lockfile.Lockfile
path string // path to writer dir
ref string // ref key
offset int64
total int64
digester digest.Digester
startedAt time.Time
updatedAt time.Time
}
func (w *writer) Status() (Status, error) {
return Status{
Ref: w.ref,
Offset: w.offset,
Total: w.total,
StartedAt: w.startedAt,
UpdatedAt: w.updatedAt,
}, nil
}
// Digest returns the current digest of the content, up to the current write.
//
// Cannot be called concurrently with `Write`.
func (w *writer) Digest() digest.Digest {
return w.digester.Digest()
}
// Write p to the transaction.
//
// Note that writes are unbuffered to the backing file. When writing, it is
// recommended to wrap in a bufio.Writer or, preferably, use io.CopyBuffer.
func (w *writer) Write(p []byte) (n int, err error) {
n, err = w.fp.Write(p)
w.digester.Hash().Write(p[:n])
w.offset += int64(len(p))
w.updatedAt = time.Now()
return n, err
}
func (w *writer) Commit(size int64, expected digest.Digest) error {
if err := w.fp.Sync(); err != nil {
return errors.Wrap(err, "sync failed")
}
fi, err := w.fp.Stat()
if err != nil {
return errors.Wrap(err, "stat on ingest file failed")
}
// change to readonly, more important for read, but provides _some_
// protection from this point on. We use the existing perms with a mask
// only allowing reads honoring the umask on creation.
//
// This removes write and exec, only allowing read per the creation umask.
if err := w.fp.Chmod((fi.Mode() & os.ModePerm) &^ 0333); err != nil {
return errors.Wrap(err, "failed to change ingest file permissions")
}
if size > 0 && size != fi.Size() {
return errors.Errorf("%q failed size validation: %v != %v", w.ref, fi.Size(), size)
}
if err := w.fp.Close(); err != nil {
return errors.Wrap(err, "failed closing ingest")
}
dgst := w.digester.Digest()
if expected != "" && expected != dgst {
return errors.Errorf("unexpected digest: %v != %v", dgst, expected)
}
var (
ingest = filepath.Join(w.path, "data")
target = w.s.blobPath(dgst)
)
// make sure parent directories of blob exist
if err := os.MkdirAll(filepath.Dir(target), 0755); err != nil {
return err
}
// clean up!!
defer os.RemoveAll(w.path)
if err := os.Rename(ingest, target); err != nil {
if os.IsExist(err) {
// collision with the target file!
return ErrExists
}
return err
}
unlock(w.lock)
w.fp = nil
return nil
}
// Close the writer, flushing any unwritten data and leaving the progress in
// tact.
//
// If one needs to resume the transaction, a new writer can be obtained from
// `ContentStore.Resume` using the same key. The write can then be continued
// from it was left off.
//
// To abandon a transaction completely, first call close then `Store.Remove` to
// clean up the associated resources.
func (cw *writer) Close() (err error) {
if err := unlock(cw.lock); err != nil {
log.L.Debug("unlock failed: %v", err)
}
if cw.fp != nil {
cw.fp.Sync()
return cw.fp.Close()
}
return nil
}
func (w *writer) Truncate(size int64) error {
if size != 0 {
return errors.New("Truncate: unsupported size")
}
w.offset = 0
w.digester.Hash().Reset()
return w.fp.Truncate(0)
}

120
vendor/github.com/containerd/containerd/fs/copy.go generated vendored Normal file
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@ -0,0 +1,120 @@
package fs
import (
"io/ioutil"
"os"
"path/filepath"
"sync"
"github.com/pkg/errors"
)
var (
bufferPool = &sync.Pool{
New: func() interface{} {
return make([]byte, 32*1024)
},
}
)
// CopyDir copies the directory from src to dst.
// Most efficient copy of files is attempted.
func CopyDir(dst, src string) error {
inodes := map[uint64]string{}
return copyDirectory(dst, src, inodes)
}
func copyDirectory(dst, src string, inodes map[uint64]string) error {
stat, err := os.Stat(src)
if err != nil {
return errors.Wrapf(err, "failed to stat %s", src)
}
if !stat.IsDir() {
return errors.Errorf("source is not directory")
}
if st, err := os.Stat(dst); err != nil {
if err := os.Mkdir(dst, stat.Mode()); err != nil {
return errors.Wrapf(err, "failed to mkdir %s", dst)
}
} else if !st.IsDir() {
return errors.Errorf("cannot copy to non-directory: %s", dst)
} else {
if err := os.Chmod(dst, stat.Mode()); err != nil {
return errors.Wrapf(err, "failed to chmod on %s", dst)
}
}
fis, err := ioutil.ReadDir(src)
if err != nil {
return errors.Wrapf(err, "failed to read %s", src)
}
if err := copyFileInfo(stat, dst); err != nil {
return errors.Wrapf(err, "failed to copy file info for %s", dst)
}
for _, fi := range fis {
source := filepath.Join(src, fi.Name())
target := filepath.Join(dst, fi.Name())
switch {
case fi.IsDir():
if err := copyDirectory(target, source, inodes); err != nil {
return err
}
continue
case (fi.Mode() & os.ModeType) == 0:
link, err := getLinkSource(target, fi, inodes)
if err != nil {
return errors.Wrap(err, "failed to get hardlink")
}
if link != "" {
if err := os.Link(link, target); err != nil {
return errors.Wrap(err, "failed to create hard link")
}
} else if err := copyFile(source, target); err != nil {
return errors.Wrap(err, "failed to copy files")
}
case (fi.Mode() & os.ModeSymlink) == os.ModeSymlink:
link, err := os.Readlink(source)
if err != nil {
return errors.Wrapf(err, "failed to read link: %s", source)
}
if err := os.Symlink(link, target); err != nil {
return errors.Wrapf(err, "failed to create symlink: %s", target)
}
case (fi.Mode() & os.ModeDevice) == os.ModeDevice:
if err := copyDevice(target, fi); err != nil {
return errors.Wrapf(err, "failed to create device")
}
default:
// TODO: Support pipes and sockets
return errors.Wrapf(err, "unsupported mode %s", fi.Mode())
}
if err := copyFileInfo(fi, target); err != nil {
return errors.Wrap(err, "failed to copy file info")
}
if err := copyXAttrs(target, source); err != nil {
return errors.Wrap(err, "failed to copy xattrs")
}
}
return nil
}
func copyFile(source, target string) error {
src, err := os.Open(source)
if err != nil {
return errors.Wrapf(err, "failed to open source %s", source)
}
defer src.Close()
tgt, err := os.Create(target)
if err != nil {
return errors.Wrapf(err, "failed to open target %s", target)
}
defer tgt.Close()
return copyFileContent(tgt, src)
}

82
vendor/github.com/containerd/containerd/fs/copy_linux.go generated vendored Normal file
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@ -0,0 +1,82 @@
package fs
import (
"io"
"os"
"syscall"
"github.com/containerd/continuity/sysx"
"github.com/pkg/errors"
"golang.org/x/sys/unix"
)
func copyFileInfo(fi os.FileInfo, name string) error {
st := fi.Sys().(*syscall.Stat_t)
if err := os.Lchown(name, int(st.Uid), int(st.Gid)); err != nil {
return errors.Wrapf(err, "failed to chown %s", name)
}
if (fi.Mode() & os.ModeSymlink) != os.ModeSymlink {
if err := os.Chmod(name, fi.Mode()); err != nil {
return errors.Wrapf(err, "failed to chmod %s", name)
}
}
timespec := []unix.Timespec{unix.Timespec(st.Atim), unix.Timespec(st.Mtim)}
if err := unix.UtimesNanoAt(unix.AT_FDCWD, name, timespec, unix.AT_SYMLINK_NOFOLLOW); err != nil {
return errors.Wrapf(err, "failed to utime %s", name)
}
return nil
}
func copyFileContent(dst, src *os.File) error {
st, err := src.Stat()
if err != nil {
return errors.Wrap(err, "unable to stat source")
}
n, err := sysx.CopyFileRange(src.Fd(), nil, dst.Fd(), nil, int(st.Size()), 0)
if err != nil {
if err != syscall.ENOSYS && err != syscall.EXDEV {
return errors.Wrap(err, "copy file range failed")
}
buf := bufferPool.Get().([]byte)
_, err = io.CopyBuffer(dst, src, buf)
bufferPool.Put(buf)
return err
}
if int64(n) != st.Size() {
return errors.Wrapf(err, "short copy: %d of %d", int64(n), st.Size())
}
return nil
}
func copyXAttrs(dst, src string) error {
xattrKeys, err := sysx.LListxattr(src)
if err != nil {
return errors.Wrapf(err, "failed to list xattrs on %s", src)
}
for _, xattr := range xattrKeys {
data, err := sysx.LGetxattr(src, xattr)
if err != nil {
return errors.Wrapf(err, "failed to get xattr %q on %s", xattr, src)
}
if err := sysx.LSetxattr(dst, xattr, data, 0); err != nil {
return errors.Wrapf(err, "failed to set xattr %q on %s", xattr, dst)
}
}
return nil
}
func copyDevice(dst string, fi os.FileInfo) error {
st, ok := fi.Sys().(*syscall.Stat_t)
if !ok {
return errors.New("unsupported stat type")
}
return syscall.Mknod(dst, uint32(fi.Mode()), int(st.Rdev))
}

65
vendor/github.com/containerd/containerd/fs/copy_unix.go generated vendored Normal file
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@ -0,0 +1,65 @@
// +build darwin freebsd
package fs
import (
"io"
"os"
"syscall"
"github.com/containerd/continuity/sysx"
"github.com/pkg/errors"
)
func copyFileInfo(fi os.FileInfo, name string) error {
st := fi.Sys().(*syscall.Stat_t)
if err := os.Lchown(name, int(st.Uid), int(st.Gid)); err != nil {
return errors.Wrapf(err, "failed to chown %s", name)
}
if (fi.Mode() & os.ModeSymlink) != os.ModeSymlink {
if err := os.Chmod(name, fi.Mode()); err != nil {
return errors.Wrapf(err, "failed to chmod %s", name)
}
}
if err := syscall.UtimesNano(name, []syscall.Timespec{st.Atimespec, st.Mtimespec}); err != nil {
return errors.Wrapf(err, "failed to utime %s", name)
}
return nil
}
func copyFileContent(dst, src *os.File) error {
buf := bufferPool.Get().([]byte)
_, err := io.CopyBuffer(dst, src, buf)
bufferPool.Put(buf)
return err
}
func copyXAttrs(dst, src string) error {
xattrKeys, err := sysx.LListxattr(src)
if err != nil {
return errors.Wrapf(err, "failed to list xattrs on %s", src)
}
for _, xattr := range xattrKeys {
data, err := sysx.LGetxattr(src, xattr)
if err != nil {
return errors.Wrapf(err, "failed to get xattr %q on %s", xattr, src)
}
if err := sysx.LSetxattr(dst, xattr, data, 0); err != nil {
return errors.Wrapf(err, "failed to set xattr %q on %s", xattr, dst)
}
}
return nil
}
func copyDevice(dst string, fi os.FileInfo) error {
st, ok := fi.Sys().(*syscall.Stat_t)
if !ok {
return errors.New("unsupported stat type")
}
return syscall.Mknod(dst, uint32(fi.Mode()), int(st.Rdev))
}

33
vendor/github.com/containerd/containerd/fs/copy_windows.go generated vendored Normal file
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@ -0,0 +1,33 @@
package fs
import (
"io"
"os"
"github.com/pkg/errors"
)
func copyFileInfo(fi os.FileInfo, name string) error {
if err := os.Chmod(name, fi.Mode()); err != nil {
return errors.Wrapf(err, "failed to chmod %s", name)
}
// TODO: copy windows specific metadata
return nil
}
func copyFileContent(dst, src *os.File) error {
buf := bufferPool.Get().([]byte)
_, err := io.CopyBuffer(dst, src, buf)
bufferPool.Put(buf)
return err
}
func copyXAttrs(dst, src string) error {
return nil
}
func copyDevice(dst string, fi os.FileInfo) error {
return errors.New("device copy not supported")
}

310
vendor/github.com/containerd/containerd/fs/diff.go generated vendored Normal file
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@ -0,0 +1,310 @@
package fs
import (
"context"
"os"
"path/filepath"
"strings"
"golang.org/x/sync/errgroup"
"github.com/Sirupsen/logrus"
)
// ChangeKind is the type of modification that
// a change is making.
type ChangeKind int
const (
// ChangeKindUnmodified represents an unmodified
// file
ChangeKindUnmodified = iota
// ChangeKindAdd represents an addition of
// a file
ChangeKindAdd
// ChangeKindModify represents a change to
// an existing file
ChangeKindModify
// ChangeKindDelete represents a delete of
// a file
ChangeKindDelete
)
func (k ChangeKind) String() string {
switch k {
case ChangeKindUnmodified:
return "unmodified"
case ChangeKindAdd:
return "add"
case ChangeKindModify:
return "modify"
case ChangeKindDelete:
return "delete"
default:
return ""
}
}
// Change represents single change between a diff and its parent.
type Change struct {
Kind ChangeKind
Path string
}
// ChangeFunc is the type of function called for each change
// computed during a directory changes calculation.
type ChangeFunc func(ChangeKind, string, os.FileInfo, error) error
// Changes computes changes between two directories calling the
// given change function for each computed change. The first
// directory is intended to the base directory and second
// directory the changed directory.
//
// The change callback is called by the order of path names and
// should be appliable in that order.
// Due to this apply ordering, the following is true
// - Removed directory trees only create a single change for the root
// directory removed. Remaining changes are implied.
// - A directory which is modified to become a file will not have
// delete entries for sub-path items, their removal is implied
// by the removal of the parent directory.
//
// Opaque directories will not be treated specially and each file
// removed from the base directory will show up as a removal.
//
// File content comparisons will be done on files which have timestamps
// which may have been truncated. If either of the files being compared
// has a zero value nanosecond value, each byte will be compared for
// differences. If 2 files have the same seconds value but different
// nanosecond values where one of those values is zero, the files will
// be considered unchanged if the content is the same. This behavior
// is to account for timestamp truncation during archiving.
func Changes(ctx context.Context, a, b string, changeFn ChangeFunc) error {
if a == "" {
logrus.Debugf("Using single walk diff for %s", b)
return addDirChanges(ctx, changeFn, b)
} else if diffOptions := detectDirDiff(b, a); diffOptions != nil {
logrus.Debugf("Using single walk diff for %s from %s", diffOptions.diffDir, a)
return diffDirChanges(ctx, changeFn, a, diffOptions)
}
logrus.Debugf("Using double walk diff for %s from %s", b, a)
return doubleWalkDiff(ctx, changeFn, a, b)
}
func addDirChanges(ctx context.Context, changeFn ChangeFunc, root string) error {
return filepath.Walk(root, func(path string, f os.FileInfo, err error) error {
if err != nil {
return err
}
// Rebase path
path, err = filepath.Rel(root, path)
if err != nil {
return err
}
path = filepath.Join(string(os.PathSeparator), path)
// Skip root
if path == string(os.PathSeparator) {
return nil
}
return changeFn(ChangeKindAdd, path, f, nil)
})
}
// diffDirOptions is used when the diff can be directly calculated from
// a diff directory to its base, without walking both trees.
type diffDirOptions struct {
diffDir string
skipChange func(string) (bool, error)
deleteChange func(string, string, os.FileInfo) (string, error)
}
// diffDirChanges walks the diff directory and compares changes against the base.
func diffDirChanges(ctx context.Context, changeFn ChangeFunc, base string, o *diffDirOptions) error {
changedDirs := make(map[string]struct{})
return filepath.Walk(o.diffDir, func(path string, f os.FileInfo, err error) error {
if err != nil {
return err
}
// Rebase path
path, err = filepath.Rel(o.diffDir, path)
if err != nil {
return err
}
path = filepath.Join(string(os.PathSeparator), path)
// Skip root
if path == string(os.PathSeparator) {
return nil
}
// TODO: handle opaqueness, start new double walker at this
// location to get deletes, and skip tree in single walker
if o.skipChange != nil {
if skip, err := o.skipChange(path); skip {
return err
}
}
var kind ChangeKind
deletedFile, err := o.deleteChange(o.diffDir, path, f)
if err != nil {
return err
}
// Find out what kind of modification happened
if deletedFile != "" {
path = deletedFile
kind = ChangeKindDelete
f = nil
} else {
// Otherwise, the file was added
kind = ChangeKindAdd
// ...Unless it already existed in a base, in which case, it's a modification
stat, err := os.Stat(filepath.Join(base, path))
if err != nil && !os.IsNotExist(err) {
return err
}
if err == nil {
// The file existed in the base, so that's a modification
// However, if it's a directory, maybe it wasn't actually modified.
// If you modify /foo/bar/baz, then /foo will be part of the changed files only because it's the parent of bar
if stat.IsDir() && f.IsDir() {
if f.Size() == stat.Size() && f.Mode() == stat.Mode() && sameFsTime(f.ModTime(), stat.ModTime()) {
// Both directories are the same, don't record the change
return nil
}
}
kind = ChangeKindModify
}
}
// If /foo/bar/file.txt is modified, then /foo/bar must be part of the changed files.
// This block is here to ensure the change is recorded even if the
// modify time, mode and size of the parent directory in the rw and ro layers are all equal.
// Check https://github.com/docker/docker/pull/13590 for details.
if f.IsDir() {
changedDirs[path] = struct{}{}
}
if kind == ChangeKindAdd || kind == ChangeKindDelete {
parent := filepath.Dir(path)
if _, ok := changedDirs[parent]; !ok && parent != "/" {
pi, err := os.Stat(filepath.Join(o.diffDir, parent))
if err := changeFn(ChangeKindModify, parent, pi, err); err != nil {
return err
}
changedDirs[parent] = struct{}{}
}
}
return changeFn(kind, path, f, nil)
})
}
// doubleWalkDiff walks both directories to create a diff
func doubleWalkDiff(ctx context.Context, changeFn ChangeFunc, a, b string) (err error) {
g, ctx := errgroup.WithContext(ctx)
var (
c1 = make(chan *currentPath)
c2 = make(chan *currentPath)
f1, f2 *currentPath
rmdir string
)
g.Go(func() error {
defer close(c1)
return pathWalk(ctx, a, c1)
})
g.Go(func() error {
defer close(c2)
return pathWalk(ctx, b, c2)
})
g.Go(func() error {
for c1 != nil || c2 != nil {
if f1 == nil && c1 != nil {
f1, err = nextPath(ctx, c1)
if err != nil {
return err
}
if f1 == nil {
c1 = nil
}
}
if f2 == nil && c2 != nil {
f2, err = nextPath(ctx, c2)
if err != nil {
return err
}
if f2 == nil {
c2 = nil
}
}
if f1 == nil && f2 == nil {
continue
}
var f os.FileInfo
k, p := pathChange(f1, f2)
switch k {
case ChangeKindAdd:
if rmdir != "" {
rmdir = ""
}
f = f2.f
f2 = nil
case ChangeKindDelete:
// Check if this file is already removed by being
// under of a removed directory
if rmdir != "" && strings.HasPrefix(f1.path, rmdir) {
f1 = nil
continue
} else if rmdir == "" && f1.f.IsDir() {
rmdir = f1.path + string(os.PathSeparator)
} else if rmdir != "" {
rmdir = ""
}
f1 = nil
case ChangeKindModify:
same, err := sameFile(f1, f2)
if err != nil {
return err
}
if f1.f.IsDir() && !f2.f.IsDir() {
rmdir = f1.path + string(os.PathSeparator)
} else if rmdir != "" {
rmdir = ""
}
f = f2.f
f1 = nil
f2 = nil
if same {
if !isLinked(f) {
continue
}
k = ChangeKindUnmodified
}
}
if err := changeFn(k, p, f, nil); err != nil {
return err
}
}
return nil
})
return g.Wait()
}

102
vendor/github.com/containerd/containerd/fs/diff_unix.go generated vendored Normal file
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// +build !windows
package fs
import (
"bytes"
"os"
"path/filepath"
"strings"
"syscall"
"github.com/containerd/continuity/sysx"
"github.com/pkg/errors"
)
// whiteouts are files with a special meaning for the layered filesystem.
// Docker uses AUFS whiteout files inside exported archives. In other
// filesystems these files are generated/handled on tar creation/extraction.
// whiteoutPrefix prefix means file is a whiteout. If this is followed by a
// filename this means that file has been removed from the base layer.
const whiteoutPrefix = ".wh."
// whiteoutMetaPrefix prefix means whiteout has a special meaning and is not
// for removing an actual file. Normally these files are excluded from exported
// archives.
const whiteoutMetaPrefix = whiteoutPrefix + whiteoutPrefix
// whiteoutLinkDir is a directory AUFS uses for storing hardlink links to other
// layers. Normally these should not go into exported archives and all changed
// hardlinks should be copied to the top layer.
const whiteoutLinkDir = whiteoutMetaPrefix + "plnk"
// whiteoutOpaqueDir file means directory has been made opaque - meaning
// readdir calls to this directory do not follow to lower layers.
const whiteoutOpaqueDir = whiteoutMetaPrefix + ".opq"
// detectDirDiff returns diff dir options if a directory could
// be found in the mount info for upper which is the direct
// diff with the provided lower directory
func detectDirDiff(upper, lower string) *diffDirOptions {
// TODO: get mount options for upper
// TODO: detect AUFS
// TODO: detect overlay
return nil
}
func aufsMetadataSkip(path string) (skip bool, err error) {
skip, err = filepath.Match(string(os.PathSeparator)+whiteoutMetaPrefix+"*", path)
if err != nil {
skip = true
}
return
}
func aufsDeletedFile(root, path string, fi os.FileInfo) (string, error) {
f := filepath.Base(path)
// If there is a whiteout, then the file was removed
if strings.HasPrefix(f, whiteoutPrefix) {
originalFile := f[len(whiteoutPrefix):]
return filepath.Join(filepath.Dir(path), originalFile), nil
}
return "", nil
}
// compareSysStat returns whether the stats are equivalent,
// whether the files are considered the same file, and
// an error
func compareSysStat(s1, s2 interface{}) (bool, error) {
ls1, ok := s1.(*syscall.Stat_t)
if !ok {
return false, nil
}
ls2, ok := s2.(*syscall.Stat_t)
if !ok {
return false, nil
}
return ls1.Mode == ls2.Mode && ls1.Uid == ls2.Uid && ls1.Gid == ls2.Gid && ls1.Rdev == ls2.Rdev, nil
}
func compareCapabilities(p1, p2 string) (bool, error) {
c1, err := sysx.LGetxattr(p1, "security.capability")
if err != nil && err != sysx.ENODATA {
return false, errors.Wrapf(err, "failed to get xattr for %s", p1)
}
c2, err := sysx.LGetxattr(p2, "security.capability")
if err != nil && err != sysx.ENODATA {
return false, errors.Wrapf(err, "failed to get xattr for %s", p2)
}
return bytes.Equal(c1, c2), nil
}
func isLinked(f os.FileInfo) bool {
s, ok := f.Sys().(*syscall.Stat_t)
if !ok {
return false
}
return !f.IsDir() && s.Nlink > 1
}

21
vendor/github.com/containerd/containerd/fs/diff_windows.go generated vendored Normal file
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@ -0,0 +1,21 @@
package fs
import "os"
func detectDirDiff(upper, lower string) *diffDirOptions {
return nil
}
func compareSysStat(s1, s2 interface{}) (bool, error) {
// TODO: Use windows specific sys type
return false, nil
}
func compareCapabilities(p1, p2 string) (bool, error) {
// TODO: Use windows equivalent
return true, nil
}
func isLinked(os.FileInfo) bool {
return false
}

87
vendor/github.com/containerd/containerd/fs/dtype_linux.go generated vendored Normal file
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@ -0,0 +1,87 @@
// +build linux
package fs
import (
"fmt"
"io/ioutil"
"os"
"syscall"
"unsafe"
)
func locateDummyIfEmpty(path string) (string, error) {
children, err := ioutil.ReadDir(path)
if err != nil {
return "", err
}
if len(children) != 0 {
return "", nil
}
dummyFile, err := ioutil.TempFile(path, "fsutils-dummy")
if err != nil {
return "", err
}
name := dummyFile.Name()
err = dummyFile.Close()
return name, err
}
// SupportsDType returns whether the filesystem mounted on path supports d_type
func SupportsDType(path string) (bool, error) {
// locate dummy so that we have at least one dirent
dummy, err := locateDummyIfEmpty(path)
if err != nil {
return false, err
}
if dummy != "" {
defer os.Remove(dummy)
}
visited := 0
supportsDType := true
fn := func(ent *syscall.Dirent) bool {
visited++
if ent.Type == syscall.DT_UNKNOWN {
supportsDType = false
// stop iteration
return true
}
// continue iteration
return false
}
if err = iterateReadDir(path, fn); err != nil {
return false, err
}
if visited == 0 {
return false, fmt.Errorf("did not hit any dirent during iteration %s", path)
}
return supportsDType, nil
}
func iterateReadDir(path string, fn func(*syscall.Dirent) bool) error {
d, err := os.Open(path)
if err != nil {
return err
}
defer d.Close()
fd := int(d.Fd())
buf := make([]byte, 4096)
for {
nbytes, err := syscall.ReadDirent(fd, buf)
if err != nil {
return err
}
if nbytes == 0 {
break
}
for off := 0; off < nbytes; {
ent := (*syscall.Dirent)(unsafe.Pointer(&buf[off]))
if stop := fn(ent); stop {
return nil
}
off += int(ent.Reclen)
}
}
return nil
}

12
vendor/github.com/containerd/containerd/fs/du.go generated vendored Normal file
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@ -0,0 +1,12 @@
package fs
type Usage struct {
Inodes int64
Size int64
}
// DiskUsage counts the number of inodes and disk usage for the resources under
// path.
func DiskUsage(roots ...string) (Usage, error) {
return diskUsage(roots...)
}

42
vendor/github.com/containerd/containerd/fs/du_unix.go generated vendored Normal file
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@ -0,0 +1,42 @@
// +build !windows
package fs
import (
"os"
"path/filepath"
"syscall"
)
func diskUsage(roots ...string) (Usage, error) {
type inode struct {
// TODO(stevvooe): Can probably reduce memory usage by not tracking
// device, but we can leave this right for now.
dev, ino uint64
}
var (
size int64
inodes = map[inode]struct{}{} // expensive!
)
for _, root := range roots {
if err := filepath.Walk(root, func(path string, fi os.FileInfo, err error) error {
if err != nil {
return err
}
stat := fi.Sys().(*syscall.Stat_t)
inodes[inode{dev: uint64(stat.Dev), ino: uint64(stat.Ino)}] = struct{}{}
size += fi.Size()
return nil
}); err != nil {
return Usage{}, err
}
}
return Usage{
Inodes: int64(len(inodes)),
Size: size,
}, nil
}

33
vendor/github.com/containerd/containerd/fs/du_windows.go generated vendored Normal file
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@ -0,0 +1,33 @@
// +build windows
package fs
import (
"os"
"path/filepath"
)
func diskUsage(roots ...string) (Usage, error) {
var (
size int64
)
// TODO(stevvooe): Support inodes (or equivalent) for windows.
for _, root := range roots {
if err := filepath.Walk(root, func(path string, fi os.FileInfo, err error) error {
if err != nil {
return err
}
size += fi.Size()
return nil
}); err != nil {
return Usage{}, err
}
}
return Usage{
Size: size,
}, nil
}

27
vendor/github.com/containerd/containerd/fs/hardlink.go generated vendored Normal file
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@ -0,0 +1,27 @@
package fs
import "os"
// GetLinkID returns an identifier representing the node a hardlink is pointing
// to. If the file is not hard linked then 0 will be returned.
func GetLinkInfo(fi os.FileInfo) (uint64, bool) {
return getLinkInfo(fi)
}
// getLinkSource returns a path for the given name and
// file info to its link source in the provided inode
// map. If the given file name is not in the map and
// has other links, it is added to the inode map
// to be a source for other link locations.
func getLinkSource(name string, fi os.FileInfo, inodes map[uint64]string) (string, error) {
inode, isHardlink := getLinkInfo(fi)
if !isHardlink {
return "", nil
}
path, ok := inodes[inode]
if !ok {
inodes[inode] = name
}
return path, nil
}

17
vendor/github.com/containerd/containerd/fs/hardlink_unix.go generated vendored Normal file
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@ -0,0 +1,17 @@
// +build !windows
package fs
import (
"os"
"syscall"
)
func getLinkInfo(fi os.FileInfo) (uint64, bool) {
s, ok := fi.Sys().(*syscall.Stat_t)
if !ok {
return 0, false
}
return uint64(s.Ino), !fi.IsDir() && s.Nlink > 1
}

7
vendor/github.com/containerd/containerd/fs/hardlink_windows.go generated vendored Normal file
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@ -0,0 +1,7 @@
package fs
import "os"
func getLinkInfo(fi os.FileInfo) (uint64, bool) {
return 0, false
}

162
vendor/github.com/containerd/containerd/fs/path.go generated vendored Normal file
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@ -0,0 +1,162 @@
package fs
import (
"bytes"
"context"
"io"
"os"
"path/filepath"
"strings"
)
type currentPath struct {
path string
f os.FileInfo
fullPath string
}
func pathChange(lower, upper *currentPath) (ChangeKind, string) {
if lower == nil {
if upper == nil {
panic("cannot compare nil paths")
}
return ChangeKindAdd, upper.path
}
if upper == nil {
return ChangeKindDelete, lower.path
}
// TODO: compare by directory
switch i := strings.Compare(lower.path, upper.path); {
case i < 0:
// File in lower that is not in upper
return ChangeKindDelete, lower.path
case i > 0:
// File in upper that is not in lower
return ChangeKindAdd, upper.path
default:
return ChangeKindModify, upper.path
}
}
func sameFile(f1, f2 *currentPath) (bool, error) {
if os.SameFile(f1.f, f2.f) {
return true, nil
}
equalStat, err := compareSysStat(f1.f.Sys(), f2.f.Sys())
if err != nil || !equalStat {
return equalStat, err
}
if eq, err := compareCapabilities(f1.fullPath, f2.fullPath); err != nil || !eq {
return eq, err
}
// If not a directory also check size, modtime, and content
if !f1.f.IsDir() {
if f1.f.Size() != f2.f.Size() {
return false, nil
}
t1 := f1.f.ModTime()
t2 := f2.f.ModTime()
if t1.Unix() != t2.Unix() {
return false, nil
}
// If the timestamp may have been truncated in one of the
// files, check content of file to determine difference
if t1.Nanosecond() == 0 || t2.Nanosecond() == 0 {
if f1.f.Size() > 0 {
eq, err := compareFileContent(f1.fullPath, f2.fullPath)
if err != nil || !eq {
return eq, err
}
}
} else if t1.Nanosecond() != t2.Nanosecond() {
return false, nil
}
}
return true, nil
}
const compareChuckSize = 32 * 1024
// compareFileContent compares the content of 2 same sized files
// by comparing each byte.
func compareFileContent(p1, p2 string) (bool, error) {
f1, err := os.Open(p1)
if err != nil {
return false, err
}
defer f1.Close()
f2, err := os.Open(p2)
if err != nil {
return false, err
}
defer f2.Close()
b1 := make([]byte, compareChuckSize)
b2 := make([]byte, compareChuckSize)
for {
n1, err1 := f1.Read(b1)
if err1 != nil && err1 != io.EOF {
return false, err1
}
n2, err2 := f2.Read(b2)
if err2 != nil && err2 != io.EOF {
return false, err2
}
if n1 != n2 || !bytes.Equal(b1[:n1], b2[:n2]) {
return false, nil
}
if err1 == io.EOF && err2 == io.EOF {
return true, nil
}
}
}
func pathWalk(ctx context.Context, root string, pathC chan<- *currentPath) error {
return filepath.Walk(root, func(path string, f os.FileInfo, err error) error {
if err != nil {
return err
}
// Rebase path
path, err = filepath.Rel(root, path)
if err != nil {
return err
}
path = filepath.Join(string(os.PathSeparator), path)
// Skip root
if path == string(os.PathSeparator) {
return nil
}
p := &currentPath{
path: path,
f: f,
fullPath: filepath.Join(root, path),
}
select {
case <-ctx.Done():
return ctx.Err()
case pathC <- p:
return nil
}
})
}
func nextPath(ctx context.Context, pathC <-chan *currentPath) (*currentPath, error) {
select {
case <-ctx.Done():
return nil, ctx.Err()
case p := <-pathC:
return p, nil
}
}

13
vendor/github.com/containerd/containerd/fs/time.go generated vendored Normal file
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@ -0,0 +1,13 @@
package fs
import "time"
// Gnu tar and the go tar writer don't have sub-second mtime
// precision, which is problematic when we apply changes via tar
// files, we handle this by comparing for exact times, *or* same
// second count and either a or b having exactly 0 nanoseconds
func sameFsTime(a, b time.Time) bool {
return a == b ||
(a.Unix() == b.Unix() &&
(a.Nanosecond() == 0 || b.Nanosecond() == 0))
}

81
vendor/github.com/containerd/containerd/log/context.go generated vendored Normal file
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@ -0,0 +1,81 @@
package log
import (
"context"
"path"
"github.com/Sirupsen/logrus"
)
var (
// G is an alias for GetLogger.
//
// We may want to define this locally to a package to get package tagged log
// messages.
G = GetLogger
// L is an alias for the the standard logger.
L = logrus.NewEntry(logrus.StandardLogger())
)
type (
loggerKey struct{}
moduleKey struct{}
)
// WithLogger returns a new context with the provided logger. Use in
// combination with logger.WithField(s) for great effect.
func WithLogger(ctx context.Context, logger *logrus.Entry) context.Context {
return context.WithValue(ctx, loggerKey{}, logger)
}
// GetLogger retrieves the current logger from the context. If no logger is
// available, the default logger is returned.
func GetLogger(ctx context.Context) *logrus.Entry {
logger := ctx.Value(loggerKey{})
if logger == nil {
return L
}
return logger.(*logrus.Entry)
}
// WithModule adds the module to the context, appending it with a slash if a
// module already exists. A module is just an roughly correlated defined by the
// call tree for a given context.
//
// As an example, we might have a "node" module already part of a context. If
// this function is called with "tls", the new value of module will be
// "node/tls".
//
// Modules represent the call path. If the new module and last module are the
// same, a new module entry will not be created. If the new module and old
// older module are the same but separated by other modules, the cycle will be
// represented by the module path.
func WithModule(ctx context.Context, module string) context.Context {
parent := GetModulePath(ctx)
if parent != "" {
// don't re-append module when module is the same.
if path.Base(parent) == module {
return ctx
}
module = path.Join(parent, module)
}
ctx = WithLogger(ctx, GetLogger(ctx).WithField("module", module))
return context.WithValue(ctx, moduleKey{}, module)
}
// GetModulePath returns the module path for the provided context. If no module
// is set, an empty string is returned.
func GetModulePath(ctx context.Context) string {
module := ctx.Value(moduleKey{})
if module == nil {
return ""
}
return module.(string)
}

14
vendor/github.com/containerd/containerd/log/grpc.go generated vendored Normal file
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@ -0,0 +1,14 @@
package log
import (
"context"
"google.golang.org/grpc/grpclog"
)
func init() {
ctx := WithModule(context.Background(), "grpc")
// completely replace the grpc logger with the logrus logger.
grpclog.SetLogger(G(ctx))
}

24
vendor/github.com/containerd/containerd/mount/mount.go generated vendored Normal file
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@ -0,0 +1,24 @@
package mount
// Mount is the lingua franca of containerd. A mount represents a
// serialized mount syscall. Components either emit or consume mounts.
type Mount struct {
// Type specifies the host-specific of the mount.
Type string
// Source specifies where to mount from. Depending on the host system, this
// can be a source path or device.
Source string
// Options contains zero or more fstab-style mount options. Typically,
// these are platform specific.
Options []string
}
// MountAll mounts all the provided mounts to the provided target
func MountAll(mounts []Mount, target string) error {
for _, m := range mounts {
if err := m.Mount(target); err != nil {
return err
}
}
return nil
}

70
vendor/github.com/containerd/containerd/mount/mount_linux.go generated vendored Normal file
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@ -0,0 +1,70 @@
package mount
import (
"strings"
"golang.org/x/sys/unix"
)
func (m *Mount) Mount(target string) error {
flags, data := parseMountOptions(m.Options)
return unix.Mount(m.Source, target, m.Type, uintptr(flags), data)
}
func Unmount(mount string, flags int) error {
return unix.Unmount(mount, flags)
}
// parseMountOptions takes fstab style mount options and parses them for
// use with a standard mount() syscall
func parseMountOptions(options []string) (int, string) {
var (
flag int
data []string
)
flags := map[string]struct {
clear bool
flag int
}{
"async": {true, unix.MS_SYNCHRONOUS},
"atime": {true, unix.MS_NOATIME},
"bind": {false, unix.MS_BIND},
"defaults": {false, 0},
"dev": {true, unix.MS_NODEV},
"diratime": {true, unix.MS_NODIRATIME},
"dirsync": {false, unix.MS_DIRSYNC},
"exec": {true, unix.MS_NOEXEC},
"mand": {false, unix.MS_MANDLOCK},
"noatime": {false, unix.MS_NOATIME},
"nodev": {false, unix.MS_NODEV},
"nodiratime": {false, unix.MS_NODIRATIME},
"noexec": {false, unix.MS_NOEXEC},
"nomand": {true, unix.MS_MANDLOCK},
"norelatime": {true, unix.MS_RELATIME},
"nostrictatime": {true, unix.MS_STRICTATIME},
"nosuid": {false, unix.MS_NOSUID},
"rbind": {false, unix.MS_BIND | unix.MS_REC},
"relatime": {false, unix.MS_RELATIME},
"remount": {false, unix.MS_REMOUNT},
"ro": {false, unix.MS_RDONLY},
"rw": {true, unix.MS_RDONLY},
"strictatime": {false, unix.MS_STRICTATIME},
"suid": {true, unix.MS_NOSUID},
"sync": {false, unix.MS_SYNCHRONOUS},
}
for _, o := range options {
// If the option does not exist in the flags table or the flag
// is not supported on the platform,
// then it is a data value for a specific fs type
if f, exists := flags[o]; exists && f.flag != 0 {
if f.clear {
flag &^= f.flag
} else {
flag |= f.flag
}
} else {
data = append(data, o)
}
}
return flag, strings.Join(data, ",")
}

17
vendor/github.com/containerd/containerd/mount/mount_unix.go generated vendored Normal file
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@ -0,0 +1,17 @@
// +build darwin freebsd
package mount
import "github.com/pkg/errors"
var (
ErrNotImplementOnUnix = errors.New("not implemented under unix")
)
func (m *Mount) Mount(target string) error {
return ErrNotImplementOnUnix
}
func Unmount(mount string, flags int) error {
return ErrNotImplementOnUnix
}

15
vendor/github.com/containerd/containerd/mount/mount_windows.go generated vendored Normal file
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@ -0,0 +1,15 @@
package mount
import "github.com/pkg/errors"
var (
ErrNotImplementOnWindows = errors.New("not implemented under windows")
)
func (m *Mount) Mount(target string) error {
return ErrNotImplementOnWindows
}
func Unmount(mount string, flags int) error {
return ErrNotImplementOnWindows
}

40
vendor/github.com/containerd/containerd/mount/mountinfo.go generated vendored Normal file
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@ -0,0 +1,40 @@
package mount
// Info reveals information about a particular mounted filesystem. This
// struct is populated from the content in the /proc/<pid>/mountinfo file.
type Info struct {
// ID is a unique identifier of the mount (may be reused after umount).
ID int
// Parent indicates the ID of the mount parent (or of self for the top of the
// mount tree).
Parent int
// Major indicates one half of the device ID which identifies the device class.
Major int
// Minor indicates one half of the device ID which identifies a specific
// instance of device.
Minor int
// Root of the mount within the filesystem.
Root string
// Mountpoint indicates the mount point relative to the process's root.
Mountpoint string
// Options represents mount-specific options.
Options string
// Optional represents optional fields.
Optional string
// FSType indicates the type of filesystem, such as EXT3.
FSType string
// Source indicates filesystem specific information or "none".
Source string
// VFSOptions represents per super block options.
VFSOptions string
}

45
vendor/github.com/containerd/containerd/mount/mountinfo_freebsd.go generated vendored Normal file
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@ -0,0 +1,45 @@
package mount
/*
#include <sys/param.h>
#include <sys/ucred.h>
#include <sys/mount.h>
*/
import "C"
import (
"fmt"
"reflect"
"unsafe"
)
// Self retrieves a list of mounts for the current running process.
func Self() ([]Info, error) {
var rawEntries *C.struct_statfs
count := int(C.getmntinfo(&rawEntries, C.MNT_WAIT))
if count == 0 {
return nil, fmt.Errorf("Failed to call getmntinfo")
}
var entries []C.struct_statfs
header := (*reflect.SliceHeader)(unsafe.Pointer(&entries))
header.Cap = count
header.Len = count
header.Data = uintptr(unsafe.Pointer(rawEntries))
var out []Info
for _, entry := range entries {
var mountinfo Info
mountinfo.Mountpoint = C.GoString(&entry.f_mntonname[0])
mountinfo.Source = C.GoString(&entry.f_mntfromname[0])
mountinfo.FSType = C.GoString(&entry.f_fstypename[0])
out = append(out, mountinfo)
}
return out, nil
}
// PID collects the mounts for a specific process ID.
func PID(pid int) ([]Info, error) {
return nil, fmt.Errorf("mountinfo.PID is not implemented on freebsd")
}

94
vendor/github.com/containerd/containerd/mount/mountinfo_linux.go generated vendored Normal file
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// +build linux
package mount
import (
"bufio"
"fmt"
"io"
"os"
"strings"
)
const (
/* 36 35 98:0 /mnt1 /mnt2 rw,noatime master:1 - ext3 /dev/root rw,errors=continue
(1)(2)(3) (4) (5) (6) (7) (8) (9) (10) (11)
(1) mount ID: unique identifier of the mount (may be reused after umount)
(2) parent ID: ID of parent (or of self for the top of the mount tree)
(3) major:minor: value of st_dev for files on filesystem
(4) root: root of the mount within the filesystem
(5) mount point: mount point relative to the process's root
(6) mount options: per mount options
(7) optional fields: zero or more fields of the form "tag[:value]"
(8) separator: marks the end of the optional fields
(9) filesystem type: name of filesystem of the form "type[.subtype]"
(10) mount source: filesystem specific information or "none"
(11) super options: per super block options*/
mountinfoFormat = "%d %d %d:%d %s %s %s %s"
)
// Self retrieves a list of mounts for the current running process.
func Self() ([]Info, error) {
f, err := os.Open("/proc/self/mountinfo")
if err != nil {
return nil, err
}
defer f.Close()
return parseInfoFile(f)
}
func parseInfoFile(r io.Reader) ([]Info, error) {
var (
s = bufio.NewScanner(r)
out = []Info{}
)
for s.Scan() {
if err := s.Err(); err != nil {
return nil, err
}
var (
p = Info{}
text = s.Text()
optionalFields string
)
if _, err := fmt.Sscanf(text, mountinfoFormat,
&p.ID, &p.Parent, &p.Major, &p.Minor,
&p.Root, &p.Mountpoint, &p.Options, &optionalFields); err != nil {
return nil, fmt.Errorf("Scanning '%s' failed: %s", text, err)
}
// Safe as mountinfo encodes mountpoints with spaces as \040.
index := strings.Index(text, " - ")
postSeparatorFields := strings.Fields(text[index+3:])
if len(postSeparatorFields) < 3 {
return nil, fmt.Errorf("Error found less than 3 fields post '-' in %q", text)
}
if optionalFields != "-" {
p.Optional = optionalFields
}
p.FSType = postSeparatorFields[0]
p.Source = postSeparatorFields[1]
p.VFSOptions = strings.Join(postSeparatorFields[2:], " ")
out = append(out, p)
}
return out, nil
}
// PID collects the mounts for a specific process ID. If the process
// ID is unknown, it is better to use `Self` which will inspect
// "/proc/self/mountinfo" instead.
func PID(pid int) ([]Info, error) {
f, err := os.Open(fmt.Sprintf("/proc/%d/mountinfo", pid))
if err != nil {
return nil, err
}
defer f.Close()
return parseInfoFile(f)
}

43
vendor/github.com/containerd/containerd/mount/mountinfo_solaris.go generated vendored Normal file
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// +build solaris,cgo
package mount
/*
#include <stdio.h>
#include <sys/mnttab.h>
*/
import "C"
import (
"fmt"
)
// Self retrieves a list of mounts for the current running process.
func Self() ([]Info, error) {
mnttab := C.fopen(C.CString(C.MNTTAB), C.CString("r"))
if mnttab == nil {
return nil, fmt.Errorf("Failed to open %s", C.MNTTAB)
}
var out []Info
var mp C.struct_mnttab
ret := C.getmntent(mnttab, &mp)
for ret == 0 {
var mountinfo Info
mountinfo.Mountpoint = C.GoString(mp.mnt_mountp)
mountinfo.Source = C.GoString(mp.mnt_special)
mountinfo.FSType = C.GoString(mp.mnt_fstype)
mountinfo.Options = C.GoString(mp.mnt_mntopts)
out = append(out, mountinfo)
ret = C.getmntent(mnttab, &mp)
}
C.fclose(mnttab)
return out, nil
}
// PID collects the mounts for a specific process ID.
func PID(pid int) ([]Info, error) {
return nil, fmt.Errorf("mountinfo.PID is not implemented on solaris")
}

18
vendor/github.com/containerd/containerd/mount/mountinfo_unsupported.go generated vendored Normal file
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// +build !linux,!freebsd,!solaris freebsd,!cgo solaris,!cgo
package mount
import (
"fmt"
"runtime"
)
// Self retrieves a list of mounts for the current running process.
func Self() ([]Info, error) {
return nil, fmt.Errorf("mountinfo.Self is not implemented on %s/%s", runtime.GOOS, runtime.GOARCH)
}
// PID collects the mounts for a specific process ID.
func PID(pid int) ([]Info, error) {
return nil, fmt.Errorf("mountinfo.PID is not implemented on %s/%s", runtime.GOOS, runtime.GOARCH)
}

79
vendor/github.com/containerd/containerd/plugin/container.go generated vendored Normal file
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package plugin
import "context"
type TaskInfo struct {
ID string
ContainerID string
Runtime string
Spec []byte
}
type Task interface {
// Information of the container
Info() TaskInfo
// Start the container's user defined process
Start(context.Context) error
// State returns the container's state
State(context.Context) (State, error)
// Pause pauses the container process
Pause(context.Context) error
// Resume unpauses the container process
Resume(context.Context) error
// Kill signals a container
Kill(context.Context, uint32, uint32, bool) error
// Exec adds a process into the container
Exec(context.Context, ExecOpts) (Process, error)
// Processes returns all pids for the container
Processes(context.Context) ([]uint32, error)
// Pty resizes the processes pty/console
Pty(context.Context, uint32, ConsoleSize) error
// CloseStdin closes the processes stdin
CloseStdin(context.Context, uint32) error
// Checkpoint checkpoints a container to an image with live system data
Checkpoint(context.Context, CheckpointOpts) error
}
type CheckpointOpts struct {
Exit bool
AllowTCP bool
AllowUnixSockets bool
AllowTerminal bool
FileLocks bool
EmptyNamespaces []string
Path string
}
type ExecOpts struct {
Spec []byte
IO IO
}
type Process interface {
// State returns the process state
State(context.Context) (State, error)
// Kill signals a container
Kill(context.Context, uint32, bool) error
}
type ConsoleSize struct {
Width uint32
Height uint32
}
type Status int
const (
CreatedStatus Status = iota + 1
RunningStatus
StoppedStatus
DeletedStatus
PausedStatus
)
type State interface {
// Status is the current status of the container
Status() Status
// Pid is the main process id for the container
Pid() uint32
}

10
vendor/github.com/containerd/containerd/plugin/errors.go generated vendored Normal file
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package plugin
import "errors"
var (
ErrUnknownRuntime = errors.New("unknown runtime")
ErrContainerExists = errors.New("container with id already exists")
ErrContainerNotExist = errors.New("container does not exist")
ErrRuntimeNotExist = errors.New("runtime does not exist")
)

42
vendor/github.com/containerd/containerd/plugin/event.go generated vendored Normal file
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package plugin
import "time"
type EventType int
func (t EventType) String() string {
switch t {
case ExitEvent:
return "exit"
case PausedEvent:
return "paused"
case CreateEvent:
return "create"
case StartEvent:
return "start"
case OOMEvent:
return "oom"
case ExecAddEvent:
return "execAdd"
}
return "unknown"
}
const (
ExitEvent EventType = iota + 1
PausedEvent
CreateEvent
StartEvent
OOMEvent
ExecAddEvent
)
type Event struct {
Timestamp time.Time
Type EventType
Runtime string
ID string
Pid uint32
ExitStatus uint32
ExitedAt time.Time
}

63
vendor/github.com/containerd/containerd/plugin/monitor.go generated vendored Normal file
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package plugin
// TaskMonitor provides an interface for monitoring of containers within containerd
type TaskMonitor interface {
// Monitor adds the provided container to the monitor
Monitor(Task) error
// Stop stops and removes the provided container from the monitor
Stop(Task) error
// Events emits events from the monitor
Events(chan<- *Event)
}
func NewMultiTaskMonitor(monitors ...TaskMonitor) TaskMonitor {
return &multiTaskMonitor{
monitors: monitors,
}
}
func NewNoopMonitor() TaskMonitor {
return &noopTaskMonitor{}
}
type noopTaskMonitor struct {
}
func (mm *noopTaskMonitor) Monitor(c Task) error {
return nil
}
func (mm *noopTaskMonitor) Stop(c Task) error {
return nil
}
func (mm *noopTaskMonitor) Events(events chan<- *Event) {
}
type multiTaskMonitor struct {
monitors []TaskMonitor
}
func (mm *multiTaskMonitor) Monitor(c Task) error {
for _, m := range mm.monitors {
if err := m.Monitor(c); err != nil {
return err
}
}
return nil
}
func (mm *multiTaskMonitor) Stop(c Task) error {
for _, m := range mm.monitors {
if err := m.Stop(c); err != nil {
return err
}
}
return nil
}
func (mm *multiTaskMonitor) Events(events chan<- *Event) {
for _, m := range mm.monitors {
m.Events(events)
}
}

80
vendor/github.com/containerd/containerd/plugin/plugin.go generated vendored Normal file
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package plugin
import (
"fmt"
"sync"
"github.com/boltdb/bolt"
"github.com/containerd/containerd/content"
"github.com/containerd/containerd/snapshot"
"golang.org/x/net/context"
"google.golang.org/grpc"
)
type PluginType int
const (
RuntimePlugin PluginType = iota + 1
GRPCPlugin
SnapshotPlugin
TaskMonitorPlugin
)
type Registration struct {
Type PluginType
Config interface{}
Init func(*InitContext) (interface{}, error)
}
// TODO(@crosbymichael): how to we keep this struct from growing but support dependency injection for loaded plugins?
type InitContext struct {
Root string
State string
Runtimes map[string]Runtime
Content content.Store
Meta *bolt.DB
Snapshotter snapshot.Snapshotter
Config interface{}
Context context.Context
Monitor TaskMonitor
}
type Service interface {
Register(*grpc.Server) error
}
var register = struct {
sync.Mutex
r map[string]*Registration
}{
r: make(map[string]*Registration),
}
// Load loads all plugins at the provided path into containerd
func Load(path string) (err error) {
defer func() {
if v := recover(); v != nil {
rerr, ok := v.(error)
if !ok {
rerr = fmt.Errorf("%s", v)
}
err = rerr
}
}()
return loadPlugins(path)
}
func Register(name string, r *Registration) error {
register.Lock()
defer register.Unlock()
if _, ok := register.r[name]; ok {
return fmt.Errorf("plugin already registered as %q", name)
}
register.r[name] = r
return nil
}
func Registrations() map[string]*Registration {
return register.r
}

46
vendor/github.com/containerd/containerd/plugin/plugin_go18.go generated vendored Normal file
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// +build go1.8,!windows,amd64
package plugin
import (
"fmt"
"path/filepath"
"plugin"
"runtime"
)
// loadPlugins loads all plugins for the OS and Arch
// that containerd is built for inside the provided path
func loadPlugins(path string) error {
abs, err := filepath.Abs(path)
if err != nil {
return err
}
pattern := filepath.Join(abs, fmt.Sprintf(
"*-%s-%s.%s",
runtime.GOOS,
runtime.GOARCH,
getLibExt(),
))
libs, err := filepath.Glob(pattern)
if err != nil {
return err
}
for _, lib := range libs {
if _, err := plugin.Open(lib); err != nil {
return err
}
}
return nil
}
// getLibExt returns a platform specific lib extension for
// the platform that containerd is running on
func getLibExt() string {
switch runtime.GOOS {
case "windows":
return "dll"
default:
return "so"
}
}

8
vendor/github.com/containerd/containerd/plugin/plugin_other.go generated vendored Normal file
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// +build !go1.8 windows !amd64
package plugin
func loadPlugins(path string) error {
// plugins not supported until 1.8
return nil
}

43
vendor/github.com/containerd/containerd/plugin/runtime.go generated vendored Normal file
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package plugin
import (
"context"
"time"
"github.com/containerd/containerd/mount"
)
type IO struct {
Stdin string
Stdout string
Stderr string
Terminal bool
}
type CreateOpts struct {
// Spec is the OCI runtime spec
Spec []byte
// Rootfs mounts to perform to gain access to the container's filesystem
Rootfs []mount.Mount
// IO for the container's main process
IO IO
Checkpoint string
}
type Exit struct {
Status uint32
Timestamp time.Time
}
// Runtime is responsible for the creation of containers for a certain platform,
// arch, or custom usage.
type Runtime interface {
// Create creates a container with the provided id and options
Create(ctx context.Context, id string, opts CreateOpts) (Task, error)
// Containers returns all the current containers for the runtime
Tasks(context.Context) ([]Task, error)
// Delete removes the container in the runtime
Delete(context.Context, Task) (*Exit, error)
// Events returns events for the runtime and all containers created by the runtime
Events(context.Context) <-chan *Event
}

44
vendor/github.com/containerd/containerd/snapshot/errors.go generated vendored Normal file
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package snapshot
import "github.com/pkg/errors"
var (
// ErrSnapshotNotExist is returned when a snapshot cannot be found
ErrSnapshotNotExist = errors.New("snapshot does not exist")
// ErrSnapshotExist is returned when an operation to create a snapshot
// encounters a snapshot with the same key
ErrSnapshotExist = errors.New("snapshot already exists")
// ErrSnapshotNotActive is returned when a request which requires an
// active snapshot encounters a non-active snapshot.
ErrSnapshotNotActive = errors.New("snapshot is not active")
// ErrSnapshotNotCommitted is returned when a request which requires a
// committed snapshot encounters a non-committed snapshot.
ErrSnapshotNotCommitted = errors.New("snapshot is not committed")
)
// IsNotExist returns whether the error represents that a snapshot
// was not found.
func IsNotExist(err error) bool {
return errors.Cause(err) == ErrSnapshotNotExist
}
// IsExist returns whether the error represents whether a snapshot
// already exists using a provided key.
func IsExist(err error) bool {
return errors.Cause(err) == ErrSnapshotExist
}
// IsNotActive returns whether the error represents a request
// for a non active snapshot when an active snapshot is expected.
func IsNotActive(err error) bool {
return errors.Cause(err) == ErrSnapshotNotActive
}
// IsNotCommitted returns whether the error represents a request
// for a non committed snapshot when a committed snapshot is expected.
func IsNotCommitted(err error) bool {
return errors.Cause(err) == ErrSnapshotNotCommitted
}

302
vendor/github.com/containerd/containerd/snapshot/naive/naive.go generated vendored Normal file
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package naive
import (
"context"
"io/ioutil"
"os"
"path/filepath"
"github.com/containerd/containerd/fs"
"github.com/containerd/containerd/log"
"github.com/containerd/containerd/mount"
"github.com/containerd/containerd/plugin"
"github.com/containerd/containerd/snapshot"
"github.com/containerd/containerd/snapshot/storage"
"github.com/pkg/errors"
)
func init() {
plugin.Register("snapshot-naive", &plugin.Registration{
Type: plugin.SnapshotPlugin,
Init: func(ic *plugin.InitContext) (interface{}, error) {
return NewSnapshotter(filepath.Join(ic.Root, "snapshot", "naive"))
},
})
}
type snapshotter struct {
root string
ms *storage.MetaStore
}
// NewSnapshotter returns a Snapshotter which copies layers on the underlying
// file system. A metadata file is stored under the root.
func NewSnapshotter(root string) (snapshot.Snapshotter, error) {
if err := os.MkdirAll(root, 0700); err != nil {
return nil, err
}
ms, err := storage.NewMetaStore(filepath.Join(root, "metadata.db"))
if err != nil {
return nil, err
}
if err := os.Mkdir(filepath.Join(root, "snapshots"), 0700); err != nil && !os.IsExist(err) {
return nil, err
}
return &snapshotter{
root: root,
ms: ms,
}, nil
}
// Stat returns the info for an active or committed snapshot by name or
// key.
//
// Should be used for parent resolution, existence checks and to discern
// the kind of snapshot.
func (o *snapshotter) Stat(ctx context.Context, key string) (snapshot.Info, error) {
ctx, t, err := o.ms.TransactionContext(ctx, false)
if err != nil {
return snapshot.Info{}, err
}
defer t.Rollback()
_, info, _, err := storage.GetInfo(ctx, key)
if err != nil {
return snapshot.Info{}, err
}
return info, nil
}
func (o *snapshotter) Usage(ctx context.Context, key string) (snapshot.Usage, error) {
ctx, t, err := o.ms.TransactionContext(ctx, false)
if err != nil {
return snapshot.Usage{}, err
}
defer t.Rollback()
id, info, usage, err := storage.GetInfo(ctx, key)
if err != nil {
return snapshot.Usage{}, err
}
if info.Kind == snapshot.KindActive {
du, err := fs.DiskUsage(o.getSnapshotDir(id))
if err != nil {
return snapshot.Usage{}, err
}
usage = snapshot.Usage(du)
}
return usage, nil
}
func (o *snapshotter) Prepare(ctx context.Context, key, parent string) ([]mount.Mount, error) {
return o.createActive(ctx, key, parent, false)
}
func (o *snapshotter) View(ctx context.Context, key, parent string) ([]mount.Mount, error) {
return o.createActive(ctx, key, parent, true)
}
// Mounts returns the mounts for the transaction identified by key. Can be
// called on an read-write or readonly transaction.
//
// This can be used to recover mounts after calling View or Prepare.
func (o *snapshotter) Mounts(ctx context.Context, key string) ([]mount.Mount, error) {
ctx, t, err := o.ms.TransactionContext(ctx, false)
if err != nil {
return nil, err
}
active, err := storage.GetActive(ctx, key)
t.Rollback()
if err != nil {
return nil, errors.Wrap(err, "failed to get active mount")
}
return o.mounts(active), nil
}
func (o *snapshotter) Commit(ctx context.Context, name, key string) error {
ctx, t, err := o.ms.TransactionContext(ctx, true)
if err != nil {
return err
}
id, _, _, err := storage.GetInfo(ctx, key)
if err != nil {
return err
}
usage, err := fs.DiskUsage(o.getSnapshotDir(id))
if err != nil {
return err
}
if _, err := storage.CommitActive(ctx, key, name, snapshot.Usage(usage)); err != nil {
if rerr := t.Rollback(); rerr != nil {
log.G(ctx).WithError(rerr).Warn("Failure rolling back transaction")
}
return errors.Wrap(err, "failed to commit snapshot")
}
return t.Commit()
}
// Remove abandons the transaction identified by key. All resources
// associated with the key will be removed.
func (o *snapshotter) Remove(ctx context.Context, key string) (err error) {
ctx, t, err := o.ms.TransactionContext(ctx, true)
if err != nil {
return err
}
defer func() {
if err != nil && t != nil {
if rerr := t.Rollback(); rerr != nil {
log.G(ctx).WithError(rerr).Warn("Failure rolling back transaction")
}
}
}()
id, _, err := storage.Remove(ctx, key)
if err != nil {
return errors.Wrap(err, "failed to remove")
}
path := o.getSnapshotDir(id)
renamed := filepath.Join(o.root, "snapshots", "rm-"+id)
if err := os.Rename(path, renamed); err != nil {
if !os.IsNotExist(err) {
return errors.Wrap(err, "failed to rename")
}
renamed = ""
}
err = t.Commit()
t = nil
if err != nil {
if renamed != "" {
if err1 := os.Rename(renamed, path); err1 != nil {
// May cause inconsistent data on disk
log.G(ctx).WithError(err1).WithField("path", renamed).Errorf("Failed to rename after failed commit")
}
}
return errors.Wrap(err, "failed to commit")
}
if renamed != "" {
if err := os.RemoveAll(renamed); err != nil {
// Must be cleaned up, any "rm-*" could be removed if no active transactions
log.G(ctx).WithError(err).WithField("path", renamed).Warnf("Failed to remove root filesystem")
}
}
return nil
}
// Walk the committed snapshots.
func (o *snapshotter) Walk(ctx context.Context, fn func(context.Context, snapshot.Info) error) error {
ctx, t, err := o.ms.TransactionContext(ctx, false)
if err != nil {
return err
}
defer t.Rollback()
return storage.WalkInfo(ctx, fn)
}
func (o *snapshotter) createActive(ctx context.Context, key, parent string, readonly bool) ([]mount.Mount, error) {
var (
err error
path, td string
)
if !readonly || parent == "" {
td, err = ioutil.TempDir(filepath.Join(o.root, "snapshots"), "new-")
if err != nil {
return nil, errors.Wrap(err, "failed to create temp dir")
}
defer func() {
if err != nil {
if td != "" {
if err1 := os.RemoveAll(td); err1 != nil {
err = errors.Wrapf(err, "remove failed: %v", err1)
}
}
if path != "" {
if err1 := os.RemoveAll(path); err1 != nil {
err = errors.Wrapf(err, "failed to remove path: %v", err1)
}
}
}
}()
}
ctx, t, err := o.ms.TransactionContext(ctx, true)
if err != nil {
return nil, err
}
active, err := storage.CreateActive(ctx, key, parent, readonly)
if err != nil {
if rerr := t.Rollback(); rerr != nil {
log.G(ctx).WithError(rerr).Warn("Failure rolling back transaction")
}
return nil, errors.Wrap(err, "failed to create active")
}
if td != "" {
if len(active.ParentIDs) > 0 {
parent := o.getSnapshotDir(active.ParentIDs[0])
if err := fs.CopyDir(td, parent); err != nil {
return nil, errors.Wrap(err, "copying of parent failed")
}
}
path = o.getSnapshotDir(active.ID)
if err := os.Rename(td, path); err != nil {
if rerr := t.Rollback(); rerr != nil {
log.G(ctx).WithError(rerr).Warn("Failure rolling back transaction")
}
return nil, errors.Wrap(err, "failed to rename")
}
td = ""
}
if err := t.Commit(); err != nil {
return nil, errors.Wrap(err, "commit failed")
}
return o.mounts(active), nil
}
func (o *snapshotter) getSnapshotDir(id string) string {
return filepath.Join(o.root, "snapshots", id)
}
func (o *snapshotter) mounts(active storage.Active) []mount.Mount {
var (
roFlag string
source string
)
if active.Readonly {
roFlag = "ro"
} else {
roFlag = "rw"
}
if len(active.ParentIDs) == 0 || !active.Readonly {
source = o.getSnapshotDir(active.ID)
} else {
source = o.getSnapshotDir(active.ParentIDs[0])
}
return []mount.Mount{
{
Source: source,
Type: "bind",
Options: []string{
roFlag,
"rbind",
},
},
}
}

238
vendor/github.com/containerd/containerd/snapshot/snapshotter.go generated vendored Normal file
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package snapshot
import (
"context"
"github.com/containerd/containerd/mount"
)
// Kind identifies the kind of snapshot.
type Kind int
// definitions of snapshot kinds
const (
KindActive Kind = iota
KindCommitted
)
// Info provides information about a particular snapshot.
type Info struct {
Name string // name or key of snapshot
Parent string // name of parent snapshot
Kind Kind // active or committed snapshot
Readonly bool // true if readonly, only valid for active
}
// Usage defines statistics for disk resources consumed by the snapshot.
//
// These resources only include the resources consumed by the snapshot itself
// and does not include resources usage by the parent.
type Usage struct {
Inodes int64 // number of inodes in use.
Size int64 // provides usage, in bytes, of snapshot
}
func (u *Usage) Add(other Usage) {
u.Size += other.Size
// TODO(stevvooe): assumes independent inodes, but provides and upper
// bound. This should be pretty close, assumming the inodes for a
// snapshot are roughly unique to it. Don't trust this assumption.
u.Inodes += other.Inodes
}
// Snapshotter defines the methods required to implement a snapshot snapshotter for
// allocating, snapshotting and mounting filesystem changesets. The model works
// by building up sets of changes with parent-child relationships.
//
// A snapshot represents a filesystem state. Every snapshot has a parent, where
// the empty parent is represented by the empty string. A diff can be taken
// between a parent and its snapshot to generate a classic layer.
//
// An active snapshot is created by calling `Prepare`. After mounting, changes
// can be made to the snapshot. The act of commiting creates a committed
// snapshot. The committed snapshot will get the parent of active snapshot. The
// committed snapshot can then be used as a parent. Active snapshots can never
// act as a parent.
//
// Snapshots are best understood by their lifecycle. Active snapshots are
// always created with Prepare or View. Committed snapshots are always created
// with Commit. Active snapshots never become committed snapshots and vice
// versa. All snapshots may be removed.
//
// For consistency, we define the following terms to be used throughout this
// interface for snapshotter implementations:
//
// `ctx` - refers to a context.Context
// `key` - refers to an active snapshot
// `name` - refers to a committed snapshot
// `parent` - refers to the parent in relation
//
// Most methods take various combinations of these identifiers. Typically,
// `name` and `parent` will be used in cases where a method *only* takes
// committed snapshots. `key` will be used to refer to active snapshots in most
// cases, except where noted. All variables used to access snapshots use the
// same key space. For example, an active snapshot may not share the same key
// with a committed snapshot.
//
// We cover several examples below to demonstrate the utility of a snapshot
// snapshotter.
//
// Importing a Layer
//
// To import a layer, we simply have the Snapshotter provide a list of
// mounts to be applied such that our dst will capture a changeset. We start
// out by getting a path to the layer tar file and creating a temp location to
// unpack it to:
//
// layerPath, tmpDir := getLayerPath(), mkTmpDir() // just a path to layer tar file.
//
// We start by using a Snapshotter to Prepare a new snapshot transaction, using a
// key and descending from the empty parent "":
//
// mounts, err := snapshotter.Prepare(ctx, key, "")
// if err != nil { ... }
//
// We get back a list of mounts from Snapshotter.Prepare, with the key identifying
// the active snapshot. Mount this to the temporary location with the
// following:
//
// if err := containerd.MountAll(mounts, tmpDir); err != nil { ... }
//
// Once the mounts are performed, our temporary location is ready to capture
// a diff. In practice, this works similar to a filesystem transaction. The
// next step is to unpack the layer. We have a special function unpackLayer
// that applies the contents of the layer to target location and calculates the
// DiffID of the unpacked layer (this is a requirement for docker
// implementation):
//
// layer, err := os.Open(layerPath)
// if err != nil { ... }
// digest, err := unpackLayer(tmpLocation, layer) // unpack into layer location
// if err != nil { ... }
//
// When the above completes, we should have a filesystem the represents the
// contents of the layer. Careful implementations should verify that digest
// matches the expected DiffID. When completed, we unmount the mounts:
//
// unmount(mounts) // optional, for now
//
// Now that we've verified and unpacked our layer, we commit the active
// snapshot to a name. For this example, we are just going to use the layer
// digest, but in practice, this will probably be the ChainID:
//
// if err := snapshotter.Commit(ctx, digest.String(), key); err != nil { ... }
//
// Now, we have a layer in the Snapshotter that can be accessed with the digest
// provided during commit. Once you have committed the snapshot, the active
// snapshot can be removed with the following:
//
// snapshotter.Remove(ctx, key)
//
// Importing the Next Layer
//
// Making a layer depend on the above is identical to the process described
// above except that the parent is provided as parent when calling
// Manager.Prepare, assuming a clean, unique key identifier:
//
// mounts, err := snapshotter.Prepare(ctx, key, parentDigest)
//
// We then mount, apply and commit, as we did above. The new snapshot will be
// based on the content of the previous one.
//
// Running a Container
//
// To run a container, we simply provide Snapshotter.Prepare the committed image
// snapshot as the parent. After mounting, the prepared path can
// be used directly as the container's filesystem:
//
// mounts, err := snapshotter.Prepare(ctx, containerKey, imageRootFSChainID)
//
// The returned mounts can then be passed directly to the container runtime. If
// one would like to create a new image from the filesystem, Manager.Commit is
// called:
//
// if err := snapshotter.Commit(ctx, newImageSnapshot, containerKey); err != nil { ... }
//
// Alternatively, for most container runs, Snapshotter.Remove will be called to
// signal the Snapshotter to abandon the changes.
type Snapshotter interface {
// Stat returns the info for an active or committed snapshot by name or
// key.
//
// Should be used for parent resolution, existence checks and to discern
// the kind of snapshot.
Stat(ctx context.Context, key string) (Info, error)
// Usage returns the resource usage of an active or committed snapshot
// excluding the usage of parent snapshots.
//
// The running time of this call for active snapshots is dependent on
// implementation, but may be proportional to the size of the resource.
// Callers should take this into consideration. Implementations should
// attempt to honer context cancellation and avoid taking locks when making
// the calculation.
Usage(ctx context.Context, key string) (Usage, error)
// Mounts returns the mounts for the active snapshot transaction identified
// by key. Can be called on an read-write or readonly transaction. This is
// available only for active snapshots.
//
// This can be used to recover mounts after calling View or Prepare.
Mounts(ctx context.Context, key string) ([]mount.Mount, error)
// Prepare creates an active snapshot identified by key descending from the
// provided parent. The returned mounts can be used to mount the snapshot
// to capture changes.
//
// If a parent is provided, after performing the mounts, the destination
// will start with the content of the parent. The parent must be a
// committed snapshot. Changes to the mounted destination will be captured
// in relation to the parent. The default parent, "", is an empty
// directory.
//
// The changes may be saved to a committed snapshot by calling Commit. When
// one is done with the transaction, Remove should be called on the key.
//
// Multiple calls to Prepare or View with the same key should fail.
Prepare(ctx context.Context, key, parent string) ([]mount.Mount, error)
// View behaves identically to Prepare except the result may not be
// committed back to the snapshot snapshotter. View returns a readonly view on
// the parent, with the active snapshot being tracked by the given key.
//
// This method operates identically to Prepare, except that Mounts returned
// may have the readonly flag set. Any modifications to the underlying
// filesystem will be ignored. Implementations may perform this in a more
// efficient manner that differs from what would be attempted with
// `Prepare`.
//
// Commit may not be called on the provided key and will return an error.
// To collect the resources associated with key, Remove must be called with
// key as the argument.
View(ctx context.Context, key, parent string) ([]mount.Mount, error)
// Commit captures the changes between key and its parent into a snapshot
// identified by name. The name can then be used with the snapshotter's other
// methods to create subsequent snapshots.
//
// A committed snapshot will be created under name with the parent of the
// active snapshot.
//
// Commit may be called multiple times on the same key. Snapshots created
// in this manner will all reference the parent used to start the
// transaction.
Commit(ctx context.Context, name, key string) error
// Remove the committed or active snapshot by the provided key.
//
// All resources associated with the key will be removed.
//
// If the snapshot is a parent of another snapshot, its children must be
// removed before proceeding.
Remove(ctx context.Context, key string) error
// Walk all snapshots in the snapshotter. For each snapshot in the
// snapshotter, the function will be called.
Walk(ctx context.Context, fn func(context.Context, Info) error) error
}

389
vendor/github.com/containerd/containerd/snapshot/storage/bolt.go generated vendored Normal file
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package storage
import (
"context"
"encoding/binary"
"fmt"
"github.com/boltdb/bolt"
"github.com/containerd/containerd/snapshot"
db "github.com/containerd/containerd/snapshot/storage/proto"
"github.com/gogo/protobuf/proto"
"github.com/pkg/errors"
)
var (
bucketKeyStorageVersion = []byte("v1")
bucketKeySnapshot = []byte("snapshots")
bucketKeyParents = []byte("parents")
// ErrNoTransaction is returned when an operation is attempted with
// a context which is not inside of a transaction.
ErrNoTransaction = errors.New("no transaction in context")
)
type boltFileTransactor struct {
db *bolt.DB
tx *bolt.Tx
}
func (bft *boltFileTransactor) Rollback() error {
defer bft.db.Close()
return bft.tx.Rollback()
}
func (bft *boltFileTransactor) Commit() error {
defer bft.db.Close()
return bft.tx.Commit()
}
// parentKey returns a composite key of the parent and child identifiers. The
// parts of the key are separated by a zero byte.
func parentKey(parent, child uint64) []byte {
b := make([]byte, binary.Size([]uint64{parent, child})+1)
i := binary.PutUvarint(b, parent)
j := binary.PutUvarint(b[i+1:], child)
return b[0 : i+j+1]
}
// parentPrefixKey returns the parent part of the composite key with the
// zero byte separator.
func parentPrefixKey(parent uint64) []byte {
b := make([]byte, binary.Size(parent)+1)
i := binary.PutUvarint(b, parent)
return b[0 : i+1]
}
// getParentPrefix returns the first part of the composite key which
// represents the parent identifier.
func getParentPrefix(b []byte) uint64 {
parent, _ := binary.Uvarint(b)
return parent
}
// GetInfo returns the snapshot Info directly from the metadata. Requires a
// context with a storage transaction.
func GetInfo(ctx context.Context, key string) (string, snapshot.Info, snapshot.Usage, error) {
var ss db.Snapshot
err := withBucket(ctx, func(ctx context.Context, bkt, pbkt *bolt.Bucket) error {
return getSnapshot(bkt, key, &ss)
})
if err != nil {
return "", snapshot.Info{}, snapshot.Usage{}, err
}
usage := snapshot.Usage{
Inodes: ss.Inodes,
Size: ss.Size_,
}
return fmt.Sprint(ss.ID), snapshot.Info{
Name: key,
Parent: ss.Parent,
Kind: fromProtoKind(ss.Kind),
Readonly: ss.Readonly,
}, usage, nil
}
// WalkInfo iterates through all metadata Info for the stored snapshots and
// calls the provided function for each. Requires a context with a storage
// transaction.
func WalkInfo(ctx context.Context, fn func(context.Context, snapshot.Info) error) error {
return withBucket(ctx, func(ctx context.Context, bkt, pbkt *bolt.Bucket) error {
return bkt.ForEach(func(k, v []byte) error {
// skip nested buckets
if v == nil {
return nil
}
var ss db.Snapshot
if err := proto.Unmarshal(v, &ss); err != nil {
return errors.Wrap(err, "failed to unmarshal snapshot")
}
info := snapshot.Info{
Name: string(k),
Parent: ss.Parent,
Kind: fromProtoKind(ss.Kind),
Readonly: ss.Readonly,
}
return fn(ctx, info)
})
})
}
// CreateActive creates a new active snapshot transaction referenced by
// the provided key. The new active snapshot will have the provided
// parent. If the readonly option is given, the active snapshot will be
// marked as readonly and can only be removed, and not committed. The
// provided context must contain a writable transaction.
func CreateActive(ctx context.Context, key, parent string, readonly bool) (a Active, err error) {
err = createBucketIfNotExists(ctx, func(ctx context.Context, bkt, pbkt *bolt.Bucket) error {
var (
parentS *db.Snapshot
)
if parent != "" {
parentS = new(db.Snapshot)
if err := getSnapshot(bkt, parent, parentS); err != nil {
return errors.Wrap(err, "failed to get parent snapshot")
}
if parentS.Kind != db.KindCommitted {
return errors.Wrap(snapshot.ErrSnapshotNotCommitted, "parent is not committed snapshot")
}
}
b := bkt.Get([]byte(key))
if len(b) != 0 {
return snapshot.ErrSnapshotExist
}
id, err := bkt.NextSequence()
if err != nil {
return errors.Wrap(err, "unable to get identifier")
}
ss := db.Snapshot{
ID: id,
Parent: parent,
Kind: db.KindActive,
Readonly: readonly,
}
if err := putSnapshot(bkt, key, &ss); err != nil {
return err
}
if parentS != nil {
// Store a backlink from the key to the parent. Store the snapshot name
// as the value to allow following the backlink to the snapshot value.
if err := pbkt.Put(parentKey(parentS.ID, ss.ID), []byte(key)); err != nil {
return errors.Wrap(err, "failed to write parent link")
}
a.ParentIDs, err = parents(bkt, parentS)
if err != nil {
return errors.Wrap(err, "failed to get parent chain")
}
}
a.ID = fmt.Sprintf("%d", id)
a.Readonly = readonly
return nil
})
if err != nil {
return Active{}, err
}
return
}
// GetActive returns the metadata for the active snapshot transaction referenced
// by the given key. Requires a context with a storage transaction.
func GetActive(ctx context.Context, key string) (a Active, err error) {
err = withBucket(ctx, func(ctx context.Context, bkt, pbkt *bolt.Bucket) error {
b := bkt.Get([]byte(key))
if len(b) == 0 {
return snapshot.ErrSnapshotNotExist
}
var ss db.Snapshot
if err := proto.Unmarshal(b, &ss); err != nil {
return errors.Wrap(err, "failed to unmarshal snapshot")
}
if ss.Kind != db.KindActive {
return snapshot.ErrSnapshotNotActive
}
a.ID = fmt.Sprintf("%d", ss.ID)
a.Readonly = ss.Readonly
if ss.Parent != "" {
var parent db.Snapshot
if err := getSnapshot(bkt, ss.Parent, &parent); err != nil {
return errors.Wrap(err, "failed to get parent snapshot")
}
a.ParentIDs, err = parents(bkt, &parent)
if err != nil {
return errors.Wrap(err, "failed to get parent chain")
}
}
return nil
})
if err != nil {
return Active{}, err
}
return
}
// Remove removes a snapshot from the metastore. The string identifier for the
// snapshot is returned as well as the kind. The provided context must contain a
// writable transaction.
func Remove(ctx context.Context, key string) (id string, k snapshot.Kind, err error) {
err = withBucket(ctx, func(ctx context.Context, bkt, pbkt *bolt.Bucket) error {
var ss db.Snapshot
b := bkt.Get([]byte(key))
if len(b) == 0 {
return snapshot.ErrSnapshotNotExist
}
if err := proto.Unmarshal(b, &ss); err != nil {
return errors.Wrap(err, "failed to unmarshal snapshot")
}
if pbkt != nil {
k, _ := pbkt.Cursor().Seek(parentPrefixKey(ss.ID))
if getParentPrefix(k) == ss.ID {
return errors.Errorf("cannot remove snapshot with child")
}
if ss.Parent != "" {
var ps db.Snapshot
if err := getSnapshot(bkt, ss.Parent, &ps); err != nil {
return errors.Wrap(err, "failed to get parent snapshot")
}
if err := pbkt.Delete(parentKey(ps.ID, ss.ID)); err != nil {
return errors.Wrap(err, "failed to delte parent link")
}
}
}
if err := bkt.Delete([]byte(key)); err != nil {
return errors.Wrap(err, "failed to delete snapshot")
}
id = fmt.Sprintf("%d", ss.ID)
k = fromProtoKind(ss.Kind)
return nil
})
return
}
// CommitActive renames the active snapshot transaction referenced by `key`
// as a committed snapshot referenced by `Name`. The resulting snapshot will be
// committed and readonly. The `key` reference will no longer be available for
// lookup or removal. The returned string identifier for the committed snapshot
// is the same identifier of the original active snapshot. The provided context
// must contain a writable transaction.
func CommitActive(ctx context.Context, key, name string, usage snapshot.Usage) (id string, err error) {
err = withBucket(ctx, func(ctx context.Context, bkt, pbkt *bolt.Bucket) error {
b := bkt.Get([]byte(name))
if len(b) != 0 {
return errors.Wrap(snapshot.ErrSnapshotExist, "committed name already exists")
}
var ss db.Snapshot
if err := getSnapshot(bkt, key, &ss); err != nil {
return errors.Wrap(err, "failed to get active snapshot")
}
if ss.Kind != db.KindActive {
return snapshot.ErrSnapshotNotActive
}
if ss.Readonly {
return errors.Errorf("active snapshot is readonly")
}
ss.Kind = db.KindCommitted
ss.Readonly = true
ss.Inodes = usage.Inodes
ss.Size_ = usage.Size
if err := putSnapshot(bkt, name, &ss); err != nil {
return err
}
if err := bkt.Delete([]byte(key)); err != nil {
return errors.Wrap(err, "failed to delete active")
}
id = fmt.Sprintf("%d", ss.ID)
return nil
})
if err != nil {
return "", err
}
return
}
func withBucket(ctx context.Context, fn func(context.Context, *bolt.Bucket, *bolt.Bucket) error) error {
t, ok := ctx.Value(transactionKey{}).(*boltFileTransactor)
if !ok {
return ErrNoTransaction
}
bkt := t.tx.Bucket(bucketKeyStorageVersion)
if bkt == nil {
return errors.Wrap(snapshot.ErrSnapshotNotExist, "bucket does not exist")
}
return fn(ctx, bkt.Bucket(bucketKeySnapshot), bkt.Bucket(bucketKeyParents))
}
func createBucketIfNotExists(ctx context.Context, fn func(context.Context, *bolt.Bucket, *bolt.Bucket) error) error {
t, ok := ctx.Value(transactionKey{}).(*boltFileTransactor)
if !ok {
return ErrNoTransaction
}
bkt, err := t.tx.CreateBucketIfNotExists(bucketKeyStorageVersion)
if err != nil {
return errors.Wrap(err, "failed to create version bucket")
}
sbkt, err := bkt.CreateBucketIfNotExists(bucketKeySnapshot)
if err != nil {
return errors.Wrap(err, "failed to create snapshots bucket")
}
pbkt, err := bkt.CreateBucketIfNotExists(bucketKeyParents)
if err != nil {
return errors.Wrap(err, "failed to create snapshots bucket")
}
return fn(ctx, sbkt, pbkt)
}
func fromProtoKind(k db.Kind) snapshot.Kind {
if k == db.KindActive {
return snapshot.KindActive
}
return snapshot.KindCommitted
}
func parents(bkt *bolt.Bucket, parent *db.Snapshot) (parents []string, err error) {
for {
parents = append(parents, fmt.Sprintf("%d", parent.ID))
if parent.Parent == "" {
return
}
var ps db.Snapshot
if err := getSnapshot(bkt, parent.Parent, &ps); err != nil {
return nil, errors.Wrap(err, "failed to get parent snapshot")
}
parent = &ps
}
}
func getSnapshot(bkt *bolt.Bucket, key string, ss *db.Snapshot) error {
b := bkt.Get([]byte(key))
if len(b) == 0 {
return snapshot.ErrSnapshotNotExist
}
if err := proto.Unmarshal(b, ss); err != nil {
return errors.Wrap(err, "failed to unmarshal snapshot")
}
return nil
}
func putSnapshot(bkt *bolt.Bucket, key string, ss *db.Snapshot) error {
b, err := proto.Marshal(ss)
if err != nil {
return errors.Wrap(err, "failed to marshal snapshot")
}
if err := bkt.Put([]byte(key), b); err != nil {
return errors.Wrap(err, "failed to save snapshot")
}
return nil
}

82
vendor/github.com/containerd/containerd/snapshot/storage/metastore.go generated vendored Normal file
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// Package storage provides a metadata storage implementation for snapshot
// drivers. Drive implementations are responsible for starting and managing
// transactions using the defined context creator. This storage package uses
// BoltDB for storing metadata. Access to the raw boltdb transaction is not
// provided, but the stored object is provided by the proto subpackage.
package storage
import (
"context"
"github.com/boltdb/bolt"
"github.com/pkg/errors"
)
// Transactor is used to finalize an active transaction.
type Transactor interface {
// Commit commits any changes made during the transaction. On error a
// caller is expected to clean up any resources which would have relied
// on data mutated as part of this transaction. Only writable
// transactions can commit, non-writable must call Rollback.
Commit() error
// Rollback rolls back any changes made during the transaction. This
// must be called on all non-writable transactions and aborted writable
// transaction.
Rollback() error
}
// Active hold the metadata for an active snapshot transaction. The ParentIDs
// hold the snapshot identifiers for the committed snapshots this active is
// based on. The ParentIDs are ordered from the lowest base to highest, meaning
// they should be applied in order from the first index to the last index. The
// last index should always be considered the active snapshots immediate parent.
type Active struct {
ID string
ParentIDs []string
Readonly bool
}
// MetaStore is used to store metadata related to a snapshot driver. The
// MetaStore is intended to store metadata related to name, state and
// parentage. Using the MetaStore is not required to implement a snapshot
// driver but can be used to handle the persistence and transactional
// complexities of a driver implementation.
type MetaStore struct {
dbfile string
}
// NewMetaStore returns a snapshot MetaStore for storage of metadata related to
// a snapshot driver backed by a bolt file database. This implementation is
// strongly consistent and does all metadata changes in a transaction to prevent
// against process crashes causing inconsistent metadata state.
func NewMetaStore(dbfile string) (*MetaStore, error) {
return &MetaStore{
dbfile: dbfile,
}, nil
}
type transactionKey struct{}
// TransactionContext creates a new transaction context. The writable value
// should be set to true for transactions which are expected to mutate data.
func (ms *MetaStore) TransactionContext(ctx context.Context, writable bool) (context.Context, Transactor, error) {
db, err := bolt.Open(ms.dbfile, 0600, nil)
if err != nil {
return ctx, nil, errors.Wrap(err, "failed to open database file")
}
tx, err := db.Begin(writable)
if err != nil {
return ctx, nil, errors.Wrap(err, "failed to start transaction")
}
t := &boltFileTransactor{
db: db,
tx: tx,
}
ctx = context.WithValue(ctx, transactionKey{}, t)
return ctx, t, nil
}

536
vendor/github.com/containerd/containerd/snapshot/storage/proto/record.pb.go generated vendored Normal file
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// Code generated by protoc-gen-gogo.
// source: github.com/containerd/containerd/snapshot/storage/proto/record.proto
// DO NOT EDIT!
/*
Package proto is a generated protocol buffer package.
It is generated from these files:
github.com/containerd/containerd/snapshot/storage/proto/record.proto
It has these top-level messages:
Snapshot
*/
package proto
import proto1 "github.com/gogo/protobuf/proto"
import fmt "fmt"
import math "math"
import _ "github.com/gogo/protobuf/gogoproto"
import strings "strings"
import reflect "reflect"
import io "io"
// Reference imports to suppress errors if they are not otherwise used.
var _ = proto1.Marshal
var _ = fmt.Errorf
var _ = math.Inf
// This is a compile-time assertion to ensure that this generated file
// is compatible with the proto package it is being compiled against.
// A compilation error at this line likely means your copy of the
// proto package needs to be updated.
const _ = proto1.GoGoProtoPackageIsVersion2 // please upgrade the proto package
// Kind defines the kind of snapshot.
type Kind int32
const (
// KindActive represents an active snapshot
KindActive Kind = 0
// KindCommitted represents a committed immutable snapshot
KindCommitted Kind = 1
)
var Kind_name = map[int32]string{
0: "ACTIVE",
1: "COMMITTED",
}
var Kind_value = map[string]int32{
"ACTIVE": 0,
"COMMITTED": 1,
}
func (x Kind) String() string {
return proto1.EnumName(Kind_name, int32(x))
}
func (Kind) EnumDescriptor() ([]byte, []int) { return fileDescriptorRecord, []int{0} }
// Snapshot defines the storage type for a snapshot in the
// metadata store.
type Snapshot struct {
ID uint64 `protobuf:"varint,1,opt,name=id,proto3" json:"id,omitempty"`
Parent string `protobuf:"bytes,2,opt,name=parent,proto3" json:"parent,omitempty"`
Kind Kind `protobuf:"varint,4,opt,name=kind,proto3,enum=containerd.snapshot.v1.Kind" json:"kind,omitempty"`
Readonly bool `protobuf:"varint,5,opt,name=readonly,proto3" json:"readonly,omitempty"`
// inodes stores the number inodes in use for the snapshot.
//
// Only valid for committed snapshots.
Inodes int64 `protobuf:"varint,6,opt,name=inodes,proto3" json:"inodes,omitempty"`
// Size reports the disk used by the snapshot, excluding the parents.
//
// Only valid for committed snapshots, active snapshots must read the
// current usage from the disk.
Size_ int64 `protobuf:"varint,7,opt,name=size,proto3" json:"size,omitempty"`
}
func (m *Snapshot) Reset() { *m = Snapshot{} }
func (*Snapshot) ProtoMessage() {}
func (*Snapshot) Descriptor() ([]byte, []int) { return fileDescriptorRecord, []int{0} }
func init() {
proto1.RegisterType((*Snapshot)(nil), "containerd.snapshot.v1.Snapshot")
proto1.RegisterEnum("containerd.snapshot.v1.Kind", Kind_name, Kind_value)
}
func (m *Snapshot) Marshal() (dAtA []byte, err error) {
size := m.Size()
dAtA = make([]byte, size)
n, err := m.MarshalTo(dAtA)
if err != nil {
return nil, err
}
return dAtA[:n], nil
}
func (m *Snapshot) MarshalTo(dAtA []byte) (int, error) {
var i int
_ = i
var l int
_ = l
if m.ID != 0 {
dAtA[i] = 0x8
i++
i = encodeVarintRecord(dAtA, i, uint64(m.ID))
}
if len(m.Parent) > 0 {
dAtA[i] = 0x12
i++
i = encodeVarintRecord(dAtA, i, uint64(len(m.Parent)))
i += copy(dAtA[i:], m.Parent)
}
if m.Kind != 0 {
dAtA[i] = 0x20
i++
i = encodeVarintRecord(dAtA, i, uint64(m.Kind))
}
if m.Readonly {
dAtA[i] = 0x28
i++
if m.Readonly {
dAtA[i] = 1
} else {
dAtA[i] = 0
}
i++
}
if m.Inodes != 0 {
dAtA[i] = 0x30
i++
i = encodeVarintRecord(dAtA, i, uint64(m.Inodes))
}
if m.Size_ != 0 {
dAtA[i] = 0x38
i++
i = encodeVarintRecord(dAtA, i, uint64(m.Size_))
}
return i, nil
}
func encodeFixed64Record(dAtA []byte, offset int, v uint64) int {
dAtA[offset] = uint8(v)
dAtA[offset+1] = uint8(v >> 8)
dAtA[offset+2] = uint8(v >> 16)
dAtA[offset+3] = uint8(v >> 24)
dAtA[offset+4] = uint8(v >> 32)
dAtA[offset+5] = uint8(v >> 40)
dAtA[offset+6] = uint8(v >> 48)
dAtA[offset+7] = uint8(v >> 56)
return offset + 8
}
func encodeFixed32Record(dAtA []byte, offset int, v uint32) int {
dAtA[offset] = uint8(v)
dAtA[offset+1] = uint8(v >> 8)
dAtA[offset+2] = uint8(v >> 16)
dAtA[offset+3] = uint8(v >> 24)
return offset + 4
}
func encodeVarintRecord(dAtA []byte, offset int, v uint64) int {
for v >= 1<<7 {
dAtA[offset] = uint8(v&0x7f | 0x80)
v >>= 7
offset++
}
dAtA[offset] = uint8(v)
return offset + 1
}
func (m *Snapshot) Size() (n int) {
var l int
_ = l
if m.ID != 0 {
n += 1 + sovRecord(uint64(m.ID))
}
l = len(m.Parent)
if l > 0 {
n += 1 + l + sovRecord(uint64(l))
}
if m.Kind != 0 {
n += 1 + sovRecord(uint64(m.Kind))
}
if m.Readonly {
n += 2
}
if m.Inodes != 0 {
n += 1 + sovRecord(uint64(m.Inodes))
}
if m.Size_ != 0 {
n += 1 + sovRecord(uint64(m.Size_))
}
return n
}
func sovRecord(x uint64) (n int) {
for {
n++
x >>= 7
if x == 0 {
break
}
}
return n
}
func sozRecord(x uint64) (n int) {
return sovRecord(uint64((x << 1) ^ uint64((int64(x) >> 63))))
}
func (this *Snapshot) String() string {
if this == nil {
return "nil"
}
s := strings.Join([]string{`&Snapshot{`,
`ID:` + fmt.Sprintf("%v", this.ID) + `,`,
`Parent:` + fmt.Sprintf("%v", this.Parent) + `,`,
`Kind:` + fmt.Sprintf("%v", this.Kind) + `,`,
`Readonly:` + fmt.Sprintf("%v", this.Readonly) + `,`,
`Inodes:` + fmt.Sprintf("%v", this.Inodes) + `,`,
`Size_:` + fmt.Sprintf("%v", this.Size_) + `,`,
`}`,
}, "")
return s
}
func valueToStringRecord(v interface{}) string {
rv := reflect.ValueOf(v)
if rv.IsNil() {
return "nil"
}
pv := reflect.Indirect(rv).Interface()
return fmt.Sprintf("*%v", pv)
}
func (m *Snapshot) Unmarshal(dAtA []byte) error {
l := len(dAtA)
iNdEx := 0
for iNdEx < l {
preIndex := iNdEx
var wire uint64
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowRecord
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
wire |= (uint64(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
fieldNum := int32(wire >> 3)
wireType := int(wire & 0x7)
if wireType == 4 {
return fmt.Errorf("proto: Snapshot: wiretype end group for non-group")
}
if fieldNum <= 0 {
return fmt.Errorf("proto: Snapshot: illegal tag %d (wire type %d)", fieldNum, wire)
}
switch fieldNum {
case 1:
if wireType != 0 {
return fmt.Errorf("proto: wrong wireType = %d for field ID", wireType)
}
m.ID = 0
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowRecord
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
m.ID |= (uint64(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
case 2:
if wireType != 2 {
return fmt.Errorf("proto: wrong wireType = %d for field Parent", wireType)
}
var stringLen uint64
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowRecord
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
stringLen |= (uint64(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
intStringLen := int(stringLen)
if intStringLen < 0 {
return ErrInvalidLengthRecord
}
postIndex := iNdEx + intStringLen
if postIndex > l {
return io.ErrUnexpectedEOF
}
m.Parent = string(dAtA[iNdEx:postIndex])
iNdEx = postIndex
case 4:
if wireType != 0 {
return fmt.Errorf("proto: wrong wireType = %d for field Kind", wireType)
}
m.Kind = 0
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowRecord
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
m.Kind |= (Kind(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
case 5:
if wireType != 0 {
return fmt.Errorf("proto: wrong wireType = %d for field Readonly", wireType)
}
var v int
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowRecord
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
v |= (int(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
m.Readonly = bool(v != 0)
case 6:
if wireType != 0 {
return fmt.Errorf("proto: wrong wireType = %d for field Inodes", wireType)
}
m.Inodes = 0
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowRecord
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
m.Inodes |= (int64(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
case 7:
if wireType != 0 {
return fmt.Errorf("proto: wrong wireType = %d for field Size_", wireType)
}
m.Size_ = 0
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowRecord
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
m.Size_ |= (int64(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
default:
iNdEx = preIndex
skippy, err := skipRecord(dAtA[iNdEx:])
if err != nil {
return err
}
if skippy < 0 {
return ErrInvalidLengthRecord
}
if (iNdEx + skippy) > l {
return io.ErrUnexpectedEOF
}
iNdEx += skippy
}
}
if iNdEx > l {
return io.ErrUnexpectedEOF
}
return nil
}
func skipRecord(dAtA []byte) (n int, err error) {
l := len(dAtA)
iNdEx := 0
for iNdEx < l {
var wire uint64
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return 0, ErrIntOverflowRecord
}
if iNdEx >= l {
return 0, io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
wire |= (uint64(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
wireType := int(wire & 0x7)
switch wireType {
case 0:
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return 0, ErrIntOverflowRecord
}
if iNdEx >= l {
return 0, io.ErrUnexpectedEOF
}
iNdEx++
if dAtA[iNdEx-1] < 0x80 {
break
}
}
return iNdEx, nil
case 1:
iNdEx += 8
return iNdEx, nil
case 2:
var length int
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return 0, ErrIntOverflowRecord
}
if iNdEx >= l {
return 0, io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
length |= (int(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
iNdEx += length
if length < 0 {
return 0, ErrInvalidLengthRecord
}
return iNdEx, nil
case 3:
for {
var innerWire uint64
var start int = iNdEx
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return 0, ErrIntOverflowRecord
}
if iNdEx >= l {
return 0, io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
innerWire |= (uint64(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
innerWireType := int(innerWire & 0x7)
if innerWireType == 4 {
break
}
next, err := skipRecord(dAtA[start:])
if err != nil {
return 0, err
}
iNdEx = start + next
}
return iNdEx, nil
case 4:
return iNdEx, nil
case 5:
iNdEx += 4
return iNdEx, nil
default:
return 0, fmt.Errorf("proto: illegal wireType %d", wireType)
}
}
panic("unreachable")
}
var (
ErrInvalidLengthRecord = fmt.Errorf("proto: negative length found during unmarshaling")
ErrIntOverflowRecord = fmt.Errorf("proto: integer overflow")
)
func init() {
proto1.RegisterFile("github.com/containerd/containerd/snapshot/storage/proto/record.proto", fileDescriptorRecord)
}
var fileDescriptorRecord = []byte{
// 334 bytes of a gzipped FileDescriptorProto
0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x6c, 0x90, 0xbb, 0x4e, 0xf3, 0x30,
0x1c, 0xc5, 0xe3, 0x7c, 0xf9, 0x42, 0x6b, 0x41, 0x55, 0x2c, 0x54, 0x59, 0x11, 0x32, 0x16, 0x53,
0xc4, 0x90, 0x70, 0x79, 0x82, 0xde, 0x86, 0xaa, 0xaa, 0x90, 0x42, 0xc5, 0x9e, 0xc6, 0x56, 0x6a,
0x41, 0xed, 0xca, 0x31, 0x95, 0x60, 0x62, 0x44, 0x7d, 0x87, 0x4e, 0xf0, 0x08, 0x4c, 0x3c, 0x41,
0x47, 0x46, 0x26, 0x44, 0xf3, 0x24, 0x28, 0x69, 0xb9, 0x0c, 0x6c, 0xe7, 0xf7, 0xf7, 0x4f, 0xe7,
0x48, 0x86, 0x9d, 0x54, 0x98, 0xf1, 0xcd, 0x28, 0x48, 0xd4, 0x24, 0x4c, 0x94, 0x34, 0xb1, 0x90,
0x5c, 0xb3, 0xdf, 0x31, 0x93, 0xf1, 0x34, 0x1b, 0x2b, 0x13, 0x66, 0x46, 0xe9, 0x38, 0xe5, 0xe1,
0x54, 0x2b, 0xa3, 0x42, 0xcd, 0x13, 0xa5, 0x59, 0x50, 0x02, 0x6a, 0xfc, 0xf8, 0xc1, 0x97, 0x1f,
0xcc, 0x4e, 0xbc, 0xbd, 0x54, 0xa5, 0x6a, 0xed, 0x17, 0x69, 0x6d, 0x1f, 0x3e, 0x03, 0x58, 0xb9,
0xd8, 0x58, 0xa8, 0x01, 0x6d, 0xc1, 0x30, 0xa0, 0xc0, 0x77, 0x5a, 0x6e, 0xfe, 0x7e, 0x60, 0xf7,
0x3a, 0x91, 0x2d, 0x18, 0x6a, 0x40, 0x77, 0x1a, 0x6b, 0x2e, 0x0d, 0xb6, 0x29, 0xf0, 0xab, 0xd1,
0x86, 0xd0, 0x31, 0x74, 0xae, 0x84, 0x64, 0xd8, 0xa1, 0xc0, 0xaf, 0x9d, 0xee, 0x07, 0x7f, 0x2f,
0x07, 0x7d, 0x21, 0x59, 0x54, 0x9a, 0xc8, 0x83, 0x15, 0xcd, 0x63, 0xa6, 0xe4, 0xf5, 0x2d, 0xfe,
0x4f, 0x81, 0x5f, 0x89, 0xbe, 0xb9, 0x58, 0x11, 0x52, 0x31, 0x9e, 0x61, 0x97, 0x02, 0xff, 0x5f,
0xb4, 0x21, 0x84, 0xa0, 0x93, 0x89, 0x3b, 0x8e, 0xb7, 0xca, 0x6b, 0x99, 0x8f, 0x22, 0xe8, 0xf4,
0xd7, 0x7d, 0x6e, 0xb3, 0x3d, 0xec, 0x5d, 0x76, 0xeb, 0x96, 0x57, 0x9b, 0x2f, 0x28, 0x2c, 0xae,
0xcd, 0xc4, 0x88, 0x19, 0x47, 0x14, 0x56, 0xdb, 0xe7, 0x83, 0x41, 0x6f, 0x38, 0xec, 0x76, 0xea,
0xc0, 0xdb, 0x9d, 0x2f, 0xe8, 0x4e, 0xf1, 0xdc, 0x56, 0x93, 0x89, 0x30, 0x86, 0x33, 0x6f, 0xfb,
0xe1, 0x91, 0x58, 0x2f, 0x4f, 0xa4, 0xec, 0x6a, 0xe1, 0xe5, 0x8a, 0x58, 0x6f, 0x2b, 0x62, 0xdd,
0xe7, 0x04, 0x2c, 0x73, 0x02, 0x5e, 0x73, 0x02, 0x3e, 0x72, 0x02, 0x46, 0x6e, 0xf9, 0x57, 0x67,
0x9f, 0x01, 0x00, 0x00, 0xff, 0xff, 0xae, 0x6e, 0x6e, 0xcd, 0xa1, 0x01, 0x00, 0x00,
}

37
vendor/github.com/containerd/containerd/snapshot/storage/proto/record.proto generated vendored Normal file
View File

@ -0,0 +1,37 @@
syntax = "proto3";
package containerd.snapshot.v1;
import "gogoproto/gogo.proto";
// Kind defines the kind of snapshot.
enum Kind {
option (gogoproto.goproto_enum_prefix) = false;
option (gogoproto.enum_customname) = "Kind";
// KindActive represents an active snapshot
ACTIVE = 0 [(gogoproto.enumvalue_customname) = "KindActive"];
// KindCommitted represents a committed immutable snapshot
COMMITTED = 1 [(gogoproto.enumvalue_customname) = "KindCommitted"];
}
// Snapshot defines the storage type for a snapshot in the
// metadata store.
message Snapshot {
uint64 id = 1;
string parent = 2;
Kind kind = 4;
bool readonly = 5;
// inodes stores the number inodes in use for the snapshot.
//
// Only valid for committed snapshots.
int64 inodes = 6;
// Size reports the disk used by the snapshot, excluding the parents.
//
// Only valid for committed snapshots, active snapshots must read the
// current usage from the disk.
int64 size = 7;
}

39
vendor/github.com/containerd/containerd/vendor.conf generated vendored Normal file
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@ -0,0 +1,39 @@
github.com/coreos/go-systemd 48702e0da86bd25e76cfef347e2adeb434a0d0a6
github.com/containerd/go-runc 60e87b3b047d4c93faa996699f6fdcfa34685e65
github.com/containerd/console e0a2cdcf03d4d99c3bc061635a66cf92336c6c82
github.com/containerd/cgroups 7b2d1a0f50963678d5799e29d17a4d611f5a5dee
github.com/docker/go-metrics 8fd5772bf1584597834c6f7961a530f06cbfbb87
github.com/godbus/dbus c7fdd8b5cd55e87b4e1f4e372cdb1db61dd6c66f
github.com/prometheus/client_golang v0.8.0
github.com/prometheus/client_model fa8ad6fec33561be4280a8f0514318c79d7f6cb6
github.com/prometheus/common 195bde7883f7c39ea62b0d92ab7359b5327065cb
github.com/prometheus/procfs fcdb11ccb4389efb1b210b7ffb623ab71c5fdd60
github.com/beorn7/perks 4c0e84591b9aa9e6dcfdf3e020114cd81f89d5f9
github.com/matttproud/golang_protobuf_extensions v1.0.0
github.com/docker/go-units v0.3.1
github.com/gogo/protobuf d2e1ade2d719b78fe5b061b4c18a9f7111b5bdc8
github.com/golang/protobuf 8ee79997227bf9b34611aee7946ae64735e6fd93
github.com/opencontainers/runtime-spec v1.0.0-rc5
github.com/opencontainers/runc 639454475cb9c8b861cc599f8bcd5c8c790ae402
github.com/Sirupsen/logrus v0.11.0
github.com/containerd/btrfs e9c546f46bccffefe71a6bc137e4c21b5503cc18
github.com/stretchr/testify v1.1.4
github.com/davecgh/go-spew v1.1.0
github.com/pmezard/go-difflib v1.0.0
github.com/containerd/fifo 69b99525e472735860a5269b75af1970142b3062
github.com/urfave/cli 8ba6f23b6e36d03666a14bd9421f5e3efcb59aca
golang.org/x/net 8b4af36cd21a1f85a7484b49feb7c79363106d8e
google.golang.org/grpc v1.0.5
github.com/pkg/errors v0.8.0
github.com/nightlyone/lockfile 1d49c987357a327b5b03aa84cbddd582c328615d
github.com/opencontainers/go-digest 21dfd564fd89c944783d00d069f33e3e7123c448
golang.org/x/sys f3918c30c5c2cb527c0b071a27c35120a6c0719a
github.com/opencontainers/image-spec v1.0.0-rc5
github.com/containerd/continuity f4ad4294c92f596c9241947c416d1297f9faf3ea
golang.org/x/sync 450f422ab23cf9881c94e2db30cac0eb1b7cf80c
github.com/BurntSushi/toml v0.2.0-21-g9906417
github.com/grpc-ecosystem/go-grpc-prometheus 6b7015e65d366bf3f19b2b2a000a831940f0f7e0
github.com/Microsoft/go-winio v0.4.1
github.com/boltdb/bolt e9cf4fae01b5a8ff89d0ec6b32f0d9c9f79aefdd
github.com/Microsoft/hcsshim v0.5.15
github.com/Azure/go-ansiterm fa152c58bc15761d0200cb75fe958b89a9d4888e

202
vendor/github.com/containerd/continuity/LICENSE generated vendored Normal file
View File

@ -0,0 +1,202 @@
Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
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outstanding shares, or (iii) beneficial ownership of such entity.
"You" (or "Your") shall mean an individual or Legal Entity
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"Work" shall mean the work of authorship, whether in Source or
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License. However, in accepting such obligations, You may act only
on Your own behalf and on Your sole responsibility, not on behalf
of any other Contributor, and only if You agree to indemnify,
defend, and hold each Contributor harmless for any liability
incurred by, or claims asserted against, such Contributor by reason
of your accepting any such warranty or additional liability.
END OF TERMS AND CONDITIONS
APPENDIX: How to apply the Apache License to your work.
To apply the Apache License to your work, attach the following
boilerplate notice, with the fields enclosed by brackets "{}"
replaced with your own identifying information. (Don't include
the brackets!) The text should be enclosed in the appropriate
comment syntax for the file format. We also recommend that a
file or class name and description of purpose be included on the
same "printed page" as the copyright notice for easier
identification within third-party archives.
Copyright {yyyy} {name of copyright owner}
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.

19
vendor/github.com/containerd/continuity/README.md generated vendored Normal file
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# continuity
[![GoDoc](https://godoc.org/github.com/containerd/continuity?status.svg)](https://godoc.org/github.com/containerd/continuity)
[![Build Status](https://travis-ci.org/containerd/continuity.svg?branch=master)](https://travis-ci.org/containerd/continuity)
A transport-agnostic, filesystem metadata manifest system
This project is a staging area for experiments in providing transport agnostic
metadata storage.
Please see https://github.com/opencontainers/specs/issues/11 for more details.
## Building Proto Package
If you change the proto file you will need to rebuild the generated Go with `go generate`.
```
go generate ./proto
```

10
vendor/github.com/containerd/continuity/sysx/asm.s generated vendored Normal file
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@ -0,0 +1,10 @@
// Copyright 2014 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build !gccgo
#include "textflag.h"
TEXT ·use(SB),NOSPLIT,$0
RET

18
vendor/github.com/containerd/continuity/sysx/chmod_darwin.go generated vendored Normal file
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@ -0,0 +1,18 @@
package sysx
const (
// AtSymlinkNoFollow defined from AT_SYMLINK_NOFOLLOW in <sys/fcntl.h>
AtSymlinkNofollow = 0x20
)
const (
// SYS_FCHMODAT defined from golang.org/sys/unix
SYS_FCHMODAT = 467
)
// These functions will be generated by generate.sh
// $ GOOS=darwin GOARCH=386 ./generate.sh chmod
// $ GOOS=darwin GOARCH=amd64 ./generate.sh chmod
//sys Fchmodat(dirfd int, path string, mode uint32, flags int) (err error)

25
vendor/github.com/containerd/continuity/sysx/chmod_darwin_386.go generated vendored Normal file
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@ -0,0 +1,25 @@
// mksyscall.pl -l32 chmod_darwin.go
// MACHINE GENERATED BY THE COMMAND ABOVE; DO NOT EDIT
package sysx
import (
"syscall"
"unsafe"
)
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Fchmodat(dirfd int, path string, mode uint32, flags int) (err error) {
var _p0 *byte
_p0, err = syscall.BytePtrFromString(path)
if err != nil {
return
}
_, _, e1 := syscall.Syscall6(SYS_FCHMODAT, uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(flags), 0, 0)
use(unsafe.Pointer(_p0))
if e1 != 0 {
err = errnoErr(e1)
}
return
}

25
vendor/github.com/containerd/continuity/sysx/chmod_darwin_amd64.go generated vendored Normal file
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@ -0,0 +1,25 @@
// mksyscall.pl chmod_darwin.go
// MACHINE GENERATED BY THE COMMAND ABOVE; DO NOT EDIT
package sysx
import (
"syscall"
"unsafe"
)
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Fchmodat(dirfd int, path string, mode uint32, flags int) (err error) {
var _p0 *byte
_p0, err = syscall.BytePtrFromString(path)
if err != nil {
return
}
_, _, e1 := syscall.Syscall6(SYS_FCHMODAT, uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(flags), 0, 0)
use(unsafe.Pointer(_p0))
if e1 != 0 {
err = errnoErr(e1)
}
return
}

17
vendor/github.com/containerd/continuity/sysx/chmod_freebsd.go generated vendored Normal file
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@ -0,0 +1,17 @@
package sysx
const (
// AtSymlinkNoFollow defined from AT_SYMLINK_NOFOLLOW in <sys/fcntl.h>
AtSymlinkNofollow = 0x200
)
const (
// SYS_FCHMODAT defined from golang.org/sys/unix
SYS_FCHMODAT = 490
)
// These functions will be generated by generate.sh
// $ GOOS=freebsd GOARCH=amd64 ./generate.sh chmod
//sys Fchmodat(dirfd int, path string, mode uint32, flags int) (err error)

25
vendor/github.com/containerd/continuity/sysx/chmod_freebsd_amd64.go generated vendored Normal file
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@ -0,0 +1,25 @@
// mksyscall.pl chmod_freebsd.go
// MACHINE GENERATED BY THE COMMAND ABOVE; DO NOT EDIT
package sysx
import (
"syscall"
"unsafe"
)
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func Fchmodat(dirfd int, path string, mode uint32, flags int) (err error) {
var _p0 *byte
_p0, err = syscall.BytePtrFromString(path)
if err != nil {
return
}
_, _, e1 := syscall.Syscall6(SYS_FCHMODAT, uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(flags), 0, 0)
use(unsafe.Pointer(_p0))
if e1 != 0 {
err = errnoErr(e1)
}
return
}

12
vendor/github.com/containerd/continuity/sysx/chmod_linux.go generated vendored Normal file
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@ -0,0 +1,12 @@
package sysx
import "syscall"
const (
// AtSymlinkNoFollow defined from AT_SYMLINK_NOFOLLOW in /usr/include/linux/fcntl.h
AtSymlinkNofollow = 0x100
)
func Fchmodat(dirfd int, path string, mode uint32, flags int) error {
return syscall.Fchmodat(dirfd, path, mode, flags)
}

9
vendor/github.com/containerd/continuity/sysx/copy_linux.go generated vendored Normal file
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@ -0,0 +1,9 @@
package sysx
// These functions will be generated by generate.sh
// $ GOOS=linux GOARCH=386 ./generate.sh copy
// $ GOOS=linux GOARCH=amd64 ./generate.sh copy
// $ GOOS=linux GOARCH=arm ./generate.sh copy
// $ GOOS=linux GOARCH=arm64 ./generate.sh copy
//sys CopyFileRange(fdin uintptr, offin *int64, fdout uintptr, offout *int64, len int, flags int) (n int, err error)

20
vendor/github.com/containerd/continuity/sysx/copy_linux_386.go generated vendored Normal file
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@ -0,0 +1,20 @@
// mksyscall.pl -l32 copy_linux.go
// MACHINE GENERATED BY THE COMMAND ABOVE; DO NOT EDIT
package sysx
import (
"syscall"
"unsafe"
)
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func CopyFileRange(fdin uintptr, offin *int64, fdout uintptr, offout *int64, len int, flags int) (n int, err error) {
r0, _, e1 := syscall.Syscall6(SYS_COPY_FILE_RANGE, uintptr(fdin), uintptr(unsafe.Pointer(offin)), uintptr(fdout), uintptr(unsafe.Pointer(offout)), uintptr(len), uintptr(flags))
n = int(r0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}

20
vendor/github.com/containerd/continuity/sysx/copy_linux_amd64.go generated vendored Normal file
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@ -0,0 +1,20 @@
// mksyscall.pl copy_linux.go
// MACHINE GENERATED BY THE COMMAND ABOVE; DO NOT EDIT
package sysx
import (
"syscall"
"unsafe"
)
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func CopyFileRange(fdin uintptr, offin *int64, fdout uintptr, offout *int64, len int, flags int) (n int, err error) {
r0, _, e1 := syscall.Syscall6(SYS_COPY_FILE_RANGE, uintptr(fdin), uintptr(unsafe.Pointer(offin)), uintptr(fdout), uintptr(unsafe.Pointer(offout)), uintptr(len), uintptr(flags))
n = int(r0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}

20
vendor/github.com/containerd/continuity/sysx/copy_linux_arm.go generated vendored Normal file
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@ -0,0 +1,20 @@
// mksyscall.pl -l32 copy_linux.go
// MACHINE GENERATED BY THE COMMAND ABOVE; DO NOT EDIT
package sysx
import (
"syscall"
"unsafe"
)
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func CopyFileRange(fdin uintptr, offin *int64, fdout uintptr, offout *int64, len int, flags int) (n int, err error) {
r0, _, e1 := syscall.Syscall6(SYS_COPY_FILE_RANGE, uintptr(fdin), uintptr(unsafe.Pointer(offin)), uintptr(fdout), uintptr(unsafe.Pointer(offout)), uintptr(len), uintptr(flags))
n = int(r0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}

20
vendor/github.com/containerd/continuity/sysx/copy_linux_arm64.go generated vendored Normal file
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@ -0,0 +1,20 @@
// mksyscall.pl copy_linux.go
// MACHINE GENERATED BY THE COMMAND ABOVE; DO NOT EDIT
package sysx
import (
"syscall"
"unsafe"
)
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func CopyFileRange(fdin uintptr, offin *int64, fdout uintptr, offout *int64, len int, flags int) (n int, err error) {
r0, _, e1 := syscall.Syscall6(SYS_COPY_FILE_RANGE, uintptr(fdin), uintptr(unsafe.Pointer(offin)), uintptr(fdout), uintptr(unsafe.Pointer(offout)), uintptr(len), uintptr(flags))
n = int(r0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}

7
vendor/github.com/containerd/continuity/sysx/nodata_linux.go generated vendored Normal file
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@ -0,0 +1,7 @@
package sysx
import (
"syscall"
)
const ENODATA = syscall.ENODATA

9
vendor/github.com/containerd/continuity/sysx/nodata_unix.go generated vendored Normal file
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@ -0,0 +1,9 @@
// +build darwin freebsd
package sysx
import (
"syscall"
)
const ENODATA = syscall.ENOATTR

37
vendor/github.com/containerd/continuity/sysx/sys.go generated vendored Normal file
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@ -0,0 +1,37 @@
package sysx
import (
"syscall"
"unsafe"
)
var _zero uintptr
// use is a no-op, but the compiler cannot see that it is.
// Calling use(p) ensures that p is kept live until that point.
//go:noescape
func use(p unsafe.Pointer)
// Do the interface allocations only once for common
// Errno values.
var (
errEAGAIN error = syscall.EAGAIN
errEINVAL error = syscall.EINVAL
errENOENT error = syscall.ENOENT
)
// errnoErr returns common boxed Errno values, to prevent
// allocations at runtime.
func errnoErr(e syscall.Errno) error {
switch e {
case 0:
return nil
case syscall.EAGAIN:
return errEAGAIN
case syscall.EINVAL:
return errEINVAL
case syscall.ENOENT:
return errENOENT
}
return e
}

7
vendor/github.com/containerd/continuity/sysx/sysnum_linux_386.go generated vendored Normal file
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@ -0,0 +1,7 @@
package sysx
const (
// SYS_COPYFILERANGE defined in Kernel 4.5+
// Number defined in /usr/include/asm/unistd_32.h
SYS_COPY_FILE_RANGE = 377
)

7
vendor/github.com/containerd/continuity/sysx/sysnum_linux_amd64.go generated vendored Normal file
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@ -0,0 +1,7 @@
package sysx
const (
// SYS_COPYFILERANGE defined in Kernel 4.5+
// Number defined in /usr/include/asm/unistd_64.h
SYS_COPY_FILE_RANGE = 326
)

7
vendor/github.com/containerd/continuity/sysx/sysnum_linux_arm.go generated vendored Normal file
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@ -0,0 +1,7 @@
package sysx
const (
// SYS_COPY_FILE_RANGE defined in Kernel 4.5+
// Number defined in /usr/include/arm-linux-gnueabihf/asm/unistd.h
SYS_COPY_FILE_RANGE = 391
)

7
vendor/github.com/containerd/continuity/sysx/sysnum_linux_arm64.go generated vendored Normal file
View File

@ -0,0 +1,7 @@
package sysx
const (
// SYS_COPY_FILE_RANGE defined in Kernel 4.5+
// Number defined in /usr/include/asm-generic/unistd.h
SYS_COPY_FILE_RANGE = 285
)

67
vendor/github.com/containerd/continuity/sysx/xattr.go generated vendored Normal file
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@ -0,0 +1,67 @@
package sysx
import (
"bytes"
"fmt"
"syscall"
)
const defaultXattrBufferSize = 5
var ErrNotSupported = fmt.Errorf("not supported")
type listxattrFunc func(path string, dest []byte) (int, error)
func listxattrAll(path string, listFunc listxattrFunc) ([]string, error) {
var p []byte // nil on first execution
for {
n, err := listFunc(path, p) // first call gets buffer size.
if err != nil {
return nil, err
}
if n > len(p) {
p = make([]byte, n)
continue
}
p = p[:n]
ps := bytes.Split(bytes.TrimSuffix(p, []byte{0}), []byte{0})
var entries []string
for _, p := range ps {
s := string(p)
if s != "" {
entries = append(entries, s)
}
}
return entries, nil
}
}
type getxattrFunc func(string, string, []byte) (int, error)
func getxattrAll(path, attr string, getFunc getxattrFunc) ([]byte, error) {
p := make([]byte, defaultXattrBufferSize)
for {
n, err := getFunc(path, attr, p)
if err != nil {
if errno, ok := err.(syscall.Errno); ok && errno == syscall.ERANGE {
p = make([]byte, len(p)*2) // this can't be ideal.
continue // try again!
}
return nil, err
}
// realloc to correct size and repeat
if n > len(p) {
p = make([]byte, n)
continue
}
return p[:n], nil
}
}

71
vendor/github.com/containerd/continuity/sysx/xattr_darwin.go generated vendored Normal file
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@ -0,0 +1,71 @@
package sysx
// These functions will be generated by generate.sh
// $ GOOS=darwin GOARCH=386 ./generate.sh xattr
// $ GOOS=darwin GOARCH=amd64 ./generate.sh xattr
//sys getxattr(path string, attr string, dest []byte, pos int, options int) (sz int, err error)
//sys setxattr(path string, attr string, data []byte, flags int) (err error)
//sys removexattr(path string, attr string, options int) (err error)
//sys listxattr(path string, dest []byte, options int) (sz int, err error)
//sys Fchmodat(dirfd int, path string, mode uint32, flags int) (err error)
const (
xattrNoFollow = 0x01
)
func listxattrFollow(path string, dest []byte) (sz int, err error) {
return listxattr(path, dest, 0)
}
// Listxattr calls syscall getxattr
func Listxattr(path string) ([]string, error) {
return listxattrAll(path, listxattrFollow)
}
// Removexattr calls syscall getxattr
func Removexattr(path string, attr string) (err error) {
return removexattr(path, attr, 0)
}
// Setxattr calls syscall setxattr
func Setxattr(path string, attr string, data []byte, flags int) (err error) {
return setxattr(path, attr, data, flags)
}
func getxattrFollow(path, attr string, dest []byte) (sz int, err error) {
return getxattr(path, attr, dest, 0, 0)
}
// Getxattr calls syscall getxattr
func Getxattr(path, attr string) ([]byte, error) {
return getxattrAll(path, attr, getxattrFollow)
}
func listxattrNoFollow(path string, dest []byte) (sz int, err error) {
return listxattr(path, dest, xattrNoFollow)
}
// LListxattr calls syscall listxattr with XATTR_NOFOLLOW
func LListxattr(path string) ([]string, error) {
return listxattrAll(path, listxattrNoFollow)
}
// LRemovexattr calls syscall removexattr with XATTR_NOFOLLOW
func LRemovexattr(path string, attr string) (err error) {
return removexattr(path, attr, xattrNoFollow)
}
// Setxattr calls syscall setxattr with XATTR_NOFOLLOW
func LSetxattr(path string, attr string, data []byte, flags int) (err error) {
return setxattr(path, attr, data, flags|xattrNoFollow)
}
func getxattrNoFollow(path, attr string, dest []byte) (sz int, err error) {
return getxattr(path, attr, dest, 0, xattrNoFollow)
}
// LGetxattr calls syscall getxattr with XATTR_NOFOLLOW
func LGetxattr(path, attr string) ([]byte, error) {
return getxattrAll(path, attr, getxattrNoFollow)
}

111
vendor/github.com/containerd/continuity/sysx/xattr_darwin_386.go generated vendored Normal file
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@ -0,0 +1,111 @@
// mksyscall.pl -l32 xattr_darwin.go
// MACHINE GENERATED BY THE COMMAND ABOVE; DO NOT EDIT
package sysx
import (
"syscall"
"unsafe"
)
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func getxattr(path string, attr string, dest []byte, pos int, options int) (sz int, err error) {
var _p0 *byte
_p0, err = syscall.BytePtrFromString(path)
if err != nil {
return
}
var _p1 *byte
_p1, err = syscall.BytePtrFromString(attr)
if err != nil {
return
}
var _p2 unsafe.Pointer
if len(dest) > 0 {
_p2 = unsafe.Pointer(&dest[0])
} else {
_p2 = unsafe.Pointer(&_zero)
}
r0, _, e1 := syscall.Syscall6(syscall.SYS_GETXATTR, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), uintptr(_p2), uintptr(len(dest)), uintptr(pos), uintptr(options))
use(unsafe.Pointer(_p0))
use(unsafe.Pointer(_p1))
sz = int(r0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func setxattr(path string, attr string, data []byte, flags int) (err error) {
var _p0 *byte
_p0, err = syscall.BytePtrFromString(path)
if err != nil {
return
}
var _p1 *byte
_p1, err = syscall.BytePtrFromString(attr)
if err != nil {
return
}
var _p2 unsafe.Pointer
if len(data) > 0 {
_p2 = unsafe.Pointer(&data[0])
} else {
_p2 = unsafe.Pointer(&_zero)
}
_, _, e1 := syscall.Syscall6(syscall.SYS_SETXATTR, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), uintptr(_p2), uintptr(len(data)), uintptr(flags), 0)
use(unsafe.Pointer(_p0))
use(unsafe.Pointer(_p1))
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func removexattr(path string, attr string, options int) (err error) {
var _p0 *byte
_p0, err = syscall.BytePtrFromString(path)
if err != nil {
return
}
var _p1 *byte
_p1, err = syscall.BytePtrFromString(attr)
if err != nil {
return
}
_, _, e1 := syscall.Syscall(syscall.SYS_REMOVEXATTR, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), uintptr(options))
use(unsafe.Pointer(_p0))
use(unsafe.Pointer(_p1))
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func listxattr(path string, dest []byte, options int) (sz int, err error) {
var _p0 *byte
_p0, err = syscall.BytePtrFromString(path)
if err != nil {
return
}
var _p1 unsafe.Pointer
if len(dest) > 0 {
_p1 = unsafe.Pointer(&dest[0])
} else {
_p1 = unsafe.Pointer(&_zero)
}
r0, _, e1 := syscall.Syscall6(syscall.SYS_LISTXATTR, uintptr(unsafe.Pointer(_p0)), uintptr(_p1), uintptr(len(dest)), uintptr(options), 0, 0)
use(unsafe.Pointer(_p0))
sz = int(r0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}

111
vendor/github.com/containerd/continuity/sysx/xattr_darwin_amd64.go generated vendored Normal file
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@ -0,0 +1,111 @@
// mksyscall.pl xattr_darwin.go
// MACHINE GENERATED BY THE COMMAND ABOVE; DO NOT EDIT
package sysx
import (
"syscall"
"unsafe"
)
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func getxattr(path string, attr string, dest []byte, pos int, options int) (sz int, err error) {
var _p0 *byte
_p0, err = syscall.BytePtrFromString(path)
if err != nil {
return
}
var _p1 *byte
_p1, err = syscall.BytePtrFromString(attr)
if err != nil {
return
}
var _p2 unsafe.Pointer
if len(dest) > 0 {
_p2 = unsafe.Pointer(&dest[0])
} else {
_p2 = unsafe.Pointer(&_zero)
}
r0, _, e1 := syscall.Syscall6(syscall.SYS_GETXATTR, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), uintptr(_p2), uintptr(len(dest)), uintptr(pos), uintptr(options))
use(unsafe.Pointer(_p0))
use(unsafe.Pointer(_p1))
sz = int(r0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func setxattr(path string, attr string, data []byte, flags int) (err error) {
var _p0 *byte
_p0, err = syscall.BytePtrFromString(path)
if err != nil {
return
}
var _p1 *byte
_p1, err = syscall.BytePtrFromString(attr)
if err != nil {
return
}
var _p2 unsafe.Pointer
if len(data) > 0 {
_p2 = unsafe.Pointer(&data[0])
} else {
_p2 = unsafe.Pointer(&_zero)
}
_, _, e1 := syscall.Syscall6(syscall.SYS_SETXATTR, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), uintptr(_p2), uintptr(len(data)), uintptr(flags), 0)
use(unsafe.Pointer(_p0))
use(unsafe.Pointer(_p1))
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func removexattr(path string, attr string, options int) (err error) {
var _p0 *byte
_p0, err = syscall.BytePtrFromString(path)
if err != nil {
return
}
var _p1 *byte
_p1, err = syscall.BytePtrFromString(attr)
if err != nil {
return
}
_, _, e1 := syscall.Syscall(syscall.SYS_REMOVEXATTR, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), uintptr(options))
use(unsafe.Pointer(_p0))
use(unsafe.Pointer(_p1))
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func listxattr(path string, dest []byte, options int) (sz int, err error) {
var _p0 *byte
_p0, err = syscall.BytePtrFromString(path)
if err != nil {
return
}
var _p1 unsafe.Pointer
if len(dest) > 0 {
_p1 = unsafe.Pointer(&dest[0])
} else {
_p1 = unsafe.Pointer(&_zero)
}
r0, _, e1 := syscall.Syscall6(syscall.SYS_LISTXATTR, uintptr(unsafe.Pointer(_p0)), uintptr(_p1), uintptr(len(dest)), uintptr(options), 0, 0)
use(unsafe.Pointer(_p0))
sz = int(r0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}

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