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swarm/api: support mounting manifests via FUSE (#3690)

This commit is contained in:
Zahoor Mohamed 2017-03-23 19:26:06 +05:30 committed by Felix Lange
parent 61d2150a07
commit 11e7a712f4
44 changed files with 7005 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
.travis.yml
View File

@ -5,19 +5,34 @@ matrix:
include: include:
- os: linux - os: linux
dist: trusty dist: trusty
sudo: required
go: 1.7.5 go: 1.7.5
script:
- sudo -E apt-get -yq --no-install-suggests --no-install-recommends --force-yes install fuse
- sudo modprobe fuse
- sudo chmod 666 /dev/fuse
- sudo chown root:$USER /etc/fuse.conf
# These are the latest Go versions, only run go vet and misspell on these # These are the latest Go versions, only run go vet and misspell on these
- os: linux - os: linux
dist: trusty dist: trusty
sudo: required
go: 1.8 go: 1.8
script: script:
- sudo -E apt-get -yq --no-install-suggests --no-install-recommends --force-yes install fuse
- sudo modprobe fuse
- sudo chmod 666 /dev/fuse
- sudo chown root:$USER /etc/fuse.conf
- go run build/ci.go install - go run build/ci.go install
- go run build/ci.go test -coverage -vet -misspell - go run build/ci.go test -coverage -vet -misspell
- os: osx - os: osx
go: 1.8 go: 1.8
sudo: required
script: script:
- brew update
- brew install caskroom/cask/brew-cask
- brew cask install osxfuse
- go run build/ci.go install - go run build/ci.go install
- go run build/ci.go test -coverage -vet -misspell - go run build/ci.go test -coverage -vet -misspell

14
build/ci.go
View File

@ -173,6 +173,20 @@ func doInstall(cmdline []string) {
if flag.NArg() > 0 { if flag.NArg() > 0 {
packages = flag.Args() packages = flag.Args()
} }
// Resolve ./... manually and remove vendor/bazil/fuse (fuse is not in windows)
out, err := goTool("list", "./...").CombinedOutput()
if err != nil {
log.Fatalf("package listing failed: %v\n%s", err, string(out))
}
packages = []string{}
for _, line := range strings.Split(string(out), "\n") {
if !strings.Contains(line, "vendor") {
packages = append(packages, strings.TrimSpace(line))
}
}
if *arch == "" || *arch == runtime.GOARCH { if *arch == "" || *arch == runtime.GOARCH {
goinstall := goTool("install", buildFlags(env)...) goinstall := goTool("install", buildFlags(env)...)
goinstall.Args = append(goinstall.Args, "-v") goinstall.Args = append(goinstall.Args, "-v")

2
cmd/swarm/main.go
View File

@ -122,7 +122,7 @@ func init() {
// Override flag defaults so bzzd can run alongside geth. // Override flag defaults so bzzd can run alongside geth.
utils.ListenPortFlag.Value = 30399 utils.ListenPortFlag.Value = 30399
utils.IPCPathFlag.Value = utils.DirectoryString{Value: "bzzd.ipc"} utils.IPCPathFlag.Value = utils.DirectoryString{Value: "bzzd.ipc"}
utils.IPCApiFlag.Value = "admin, bzz, chequebook, debug, rpc, web3" utils.IPCApiFlag.Value = "admin, bzz, chequebook, debug, rpc, swarmfs, web3"
// Set up the cli app. // Set up the cli app.
app.Action = bzzd app.Action = bzzd

29
internal/web3ext/web3ext.go
View File

@ -27,9 +27,12 @@ var Modules = map[string]string{
"personal": Personal_JS, "personal": Personal_JS,
"rpc": RPC_JS, "rpc": RPC_JS,
"shh": Shh_JS, "shh": Shh_JS,
"swarmfs": SWARMFS_JS,
"txpool": TxPool_JS, "txpool": TxPool_JS,
} }
const Chequebook_JS = ` const Chequebook_JS = `
web3._extend({ web3._extend({
property: 'chequebook', property: 'chequebook',
@ -486,6 +489,32 @@ web3._extend({
] ]
}); });
` `
const SWARMFS_JS = `
web3._extend({
property: 'swarmfs',
methods:
[
new web3._extend.Method({
name: 'mount',
call: 'swarmfs_mount',
params: 2,
inputFormatter: [null,null]
}),
new web3._extend.Method({
name: 'unmount',
call: 'swarmfs_unmount',
params: 1,
inputFormatter: [null]
}),
new web3._extend.Method({
name: 'listmounts',
call: 'swarmfs_listmounts',
params: 0,
inputFormatter: []
})
]
});
`
const TxPool_JS = ` const TxPool_JS = `
web3._extend({ web3._extend({

139
swarm/api/fuse.go Normal file
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@ -0,0 +1,139 @@
// Copyright 2017 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
// +build !windows
package api
import (
"io"
"os"
"bazil.org/fuse"
"bazil.org/fuse/fs"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/swarm/storage"
"golang.org/x/net/context"
)
// Data structures used for Fuse filesystem, serving directories and serving files to Fuse driver
type FS struct {
root *Dir
}
type Dir struct {
inode uint64
name string
path string
directories []*Dir
files []*File
}
type File struct {
inode uint64
name string
path string
key storage.Key
swarmApi *Api
fileSize uint64
reader storage.LazySectionReader
}
// Functions which satisfy the Fuse File System requests
func (filesystem *FS) Root() (fs.Node, error) {
return filesystem.root, nil
}
func (directory *Dir) Attr(ctx context.Context, a *fuse.Attr) error {
a.Inode = directory.inode
//TODO: need to get permission as argument
a.Mode = os.ModeDir | 0500
a.Uid = uint32(os.Getuid())
a.Gid = uint32(os.Getegid())
return nil
}
func (directory *Dir) Lookup(ctx context.Context, name string) (fs.Node, error) {
if directory.files != nil {
for _, n := range directory.files {
if n.name == name {
return n, nil
}
}
}
if directory.directories != nil {
for _, n := range directory.directories {
if n.name == name {
return n, nil
}
}
}
return nil, fuse.ENOENT
}
func (d *Dir) ReadDirAll(ctx context.Context) ([]fuse.Dirent, error) {
var children []fuse.Dirent
if d.files != nil {
for _, file := range d.files {
children = append(children, fuse.Dirent{Inode: file.inode, Type: fuse.DT_File, Name: file.name})
}
}
if d.directories != nil {
for _, dir := range d.directories {
children = append(children, fuse.Dirent{Inode: dir.inode, Type: fuse.DT_Dir, Name: dir.name})
}
}
return children, nil
}
func (file *File) Attr(ctx context.Context, a *fuse.Attr) error {
a.Inode = file.inode
//TODO: need to get permission as argument
a.Mode = 0500
a.Uid = uint32(os.Getuid())
a.Gid = uint32(os.Getegid())
reader := file.swarmApi.Retrieve(file.key)
quitC := make(chan bool)
size, err := reader.Size(quitC)
if err != nil {
log.Warn("Couldnt file size of file %s : %v", file.path, err)
a.Size = uint64(0)
}
a.Size = uint64(size)
file.fileSize = a.Size
return nil
}
var _ = fs.HandleReader(&File{})
func (file *File) Read(ctx context.Context, req *fuse.ReadRequest, resp *fuse.ReadResponse) error {
buf := make([]byte, req.Size)
reader := file.swarmApi.Retrieve(file.key)
n, err := reader.ReadAt(buf, req.Offset)
if err == io.ErrUnexpectedEOF || err == io.EOF {
err = nil
}
resp.Data = buf[:n]
return err
}

48
swarm/api/swarmfs.go Normal file
View File

@ -0,0 +1,48 @@
// Copyright 2017 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package api
import (
"time"
"sync"
)
const (
Swarmfs_Version = "0.1"
mountTimeout = time.Second * 5
maxFuseMounts = 5
)
type SwarmFS struct {
swarmApi *Api
activeMounts map[string]*MountInfo
activeLock *sync.RWMutex
}
func NewSwarmFS(api *Api) *SwarmFS {
swarmfs := &SwarmFS{
swarmApi: api,
activeLock: &sync.RWMutex{},
activeMounts: map[string]*MountInfo{},
}
return swarmfs
}

266
swarm/api/swarmfs_unix.go Normal file
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@ -0,0 +1,266 @@
// Copyright 2017 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
// +build linux darwin
package api
import (
"path/filepath"
"fmt"
"strings"
"time"
"github.com/ethereum/go-ethereum/swarm/storage"
"bazil.org/fuse"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/common"
"bazil.org/fuse/fs"
"sync"
)
var (
inode uint64 = 1
inodeLock sync.RWMutex
)
// information about every active mount
type MountInfo struct {
mountPoint string
manifestHash string
resolvedKey storage.Key
rootDir *Dir
fuseConnection *fuse.Conn
}
// Inode numbers need to be unique, they are used for caching inside fuse
func NewInode() uint64 {
inodeLock.Lock()
defer inodeLock.Unlock()
inode += 1
return inode
}
func (self *SwarmFS) Mount(mhash, mountpoint string) (string, error) {
self.activeLock.Lock()
defer self.activeLock.Unlock()
noOfActiveMounts := len(self.activeMounts)
if noOfActiveMounts >= maxFuseMounts {
err := fmt.Errorf("Max mount count reached. Cannot mount %s ", mountpoint)
log.Warn(err.Error())
return err.Error(), err
}
cleanedMountPoint, err := filepath.Abs(filepath.Clean(mountpoint))
if err != nil {
return err.Error(), err
}
if _, ok := self.activeMounts[cleanedMountPoint]; ok {
err := fmt.Errorf("Mountpoint %s already mounted.", cleanedMountPoint)
log.Warn(err.Error())
return err.Error(), err
}
log.Info(fmt.Sprintf("Attempting to mount %s ", cleanedMountPoint))
key, _, path, err := self.swarmApi.parseAndResolve(mhash, true)
if err != nil {
errStr := fmt.Sprintf("Could not resolve %s : %v", mhash, err)
log.Warn(errStr)
return errStr, err
}
if len(path) > 0 {
path += "/"
}
quitC := make(chan bool)
trie, err := loadManifest(self.swarmApi.dpa, key, quitC)
if err != nil {
errStr := fmt.Sprintf("fs.Download: loadManifestTrie error: %v", err)
log.Warn(errStr)
return errStr, err
}
dirTree := map[string]*Dir{}
rootDir := &Dir{
inode: NewInode(),
name: "root",
directories: nil,
files: nil,
}
dirTree["root"] = rootDir
err = trie.listWithPrefix(path, quitC, func(entry *manifestTrieEntry, suffix string) {
key = common.Hex2Bytes(entry.Hash)
fullpath := "/" + suffix
basepath := filepath.Dir(fullpath)
filename := filepath.Base(fullpath)
parentDir := rootDir
dirUntilNow := ""
paths := strings.Split(basepath, "/")
for i := range paths {
if paths[i] != "" {
thisDir := paths[i]
dirUntilNow = dirUntilNow + "/" + thisDir
if _, ok := dirTree[dirUntilNow]; !ok {
dirTree[dirUntilNow] = &Dir{
inode: NewInode(),
name: thisDir,
path: dirUntilNow,
directories: nil,
files: nil,
}
parentDir.directories = append(parentDir.directories, dirTree[dirUntilNow])
parentDir = dirTree[dirUntilNow]
} else {
parentDir = dirTree[dirUntilNow]
}
}
}
thisFile := &File{
inode: NewInode(),
name: filename,
path: fullpath,
key: key,
swarmApi: self.swarmApi,
}
parentDir.files = append(parentDir.files, thisFile)
})
fconn, err := fuse.Mount(cleanedMountPoint, fuse.FSName("swarmfs"), fuse.VolumeName(mhash))
if err != nil {
fuse.Unmount(cleanedMountPoint)
errStr := fmt.Sprintf("Mounting %s encountered error: %v", cleanedMountPoint, err)
log.Warn(errStr)
return errStr, err
}
mounterr := make(chan error, 1)
go func() {
log.Info(fmt.Sprintf("Serving %s at %s", mhash, cleanedMountPoint))
filesys := &FS{root: rootDir}
if err := fs.Serve(fconn, filesys); err != nil {
log.Warn(fmt.Sprintf("Could not Serve FS error: %v", err))
}
}()
// Check if the mount process has an error to report.
select {
case <-time.After(mountTimeout):
err := fmt.Errorf("Mounting %s timed out.", cleanedMountPoint)
log.Warn(err.Error())
return err.Error(), err
case err := <-mounterr:
errStr := fmt.Sprintf("Mounting %s encountered error: %v", cleanedMountPoint, err)
log.Warn(errStr)
return errStr, err
case <-fconn.Ready:
log.Debug(fmt.Sprintf("Mounting connection succeeded for : %v", cleanedMountPoint))
}
//Assemble and Store the mount information for future use
mountInformation := &MountInfo{
mountPoint: cleanedMountPoint,
manifestHash: mhash,
resolvedKey: key,
rootDir: rootDir,
fuseConnection: fconn,
}
self.activeMounts[cleanedMountPoint] = mountInformation
succString := fmt.Sprintf("Mounting successful for %s", cleanedMountPoint)
log.Info(succString)
return succString, nil
}
func (self *SwarmFS) Unmount(mountpoint string) (string, error) {
self.activeLock.Lock()
defer self.activeLock.Unlock()
cleanedMountPoint, err := filepath.Abs(filepath.Clean(mountpoint))
if err != nil {
return err.Error(), err
}
// Get the mount information based on the mountpoint argument
mountInfo := self.activeMounts[cleanedMountPoint]
if mountInfo == nil || mountInfo.mountPoint != cleanedMountPoint {
err := fmt.Errorf("Could not find mount information for %s ", cleanedMountPoint)
log.Warn(err.Error())
return err.Error(), err
}
err = fuse.Unmount(cleanedMountPoint)
if err != nil {
//TODO: try forceful unmount if normal unmount fails
errStr := fmt.Sprintf("UnMount error: %v", err)
log.Warn(errStr)
return errStr, err
}
mountInfo.fuseConnection.Close()
//remove the mount information from the active map
delete(self.activeMounts, cleanedMountPoint)
succString := fmt.Sprintf("UnMounting %v succeeded", cleanedMountPoint)
log.Info(succString)
return succString, nil
}
func (self *SwarmFS) Listmounts() (string, error) {
self.activeLock.RLock()
defer self.activeLock.RUnlock()
var rows []string
for mp := range self.activeMounts {
mountInfo := self.activeMounts[mp]
rows = append(rows, fmt.Sprintf("Swarm Root: %s, Mount Point: %s ", mountInfo.manifestHash, mountInfo.mountPoint))
}
return strings.Join(rows, "\n"), nil
}
func (self *SwarmFS) Stop() bool {
for mp := range self.activeMounts {
mountInfo := self.activeMounts[mp]
self.Unmount(mountInfo.mountPoint)
}
return true
}

122
swarm/api/swarmfs_unix_test.go Normal file
View File

@ -0,0 +1,122 @@
// Copyright 2016 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
// +build linux darwin
package api
import (
"io/ioutil"
"os"
"path/filepath"
"testing"
)
var testUploadDir, _ = ioutil.TempDir(os.TempDir(), "fuse-source")
var testMountDir, _ = ioutil.TempDir(os.TempDir(), "fuse-dest")
func testFuseFileSystem(t *testing.T, f func(*FileSystem)) {
testApi(t, func(api *Api) {
f(NewFileSystem(api))
})
}
func createTestFiles(t *testing.T, files []string) {
os.RemoveAll(testUploadDir)
os.RemoveAll(testMountDir)
defer os.MkdirAll(testMountDir, 0777)
for f := range files {
actualPath := filepath.Join(testUploadDir, files[f])
filePath := filepath.Dir(actualPath)
err := os.MkdirAll(filePath, 0777)
if err != nil {
t.Fatalf("Error creating directory '%v' : %v", filePath, err)
}
_, err1 := os.OpenFile(actualPath, os.O_RDONLY|os.O_CREATE, 0666)
if err1 != nil {
t.Fatalf("Error creating file %v: %v", actualPath, err1)
}
}
}
func compareFiles(t *testing.T, files []string) {
for f := range files {
sourceFile := filepath.Join(testUploadDir, files[f])
destinationFile := filepath.Join(testMountDir, files[f])
sfinfo, err := os.Stat(sourceFile)
if err != nil {
t.Fatalf("Source file %v missing in mount: %v", files[f], err)
}
dfinfo, err := os.Stat(destinationFile)
if err != nil {
t.Fatalf("Destination file %v missing in mount: %v", files[f], err)
}
if sfinfo.Size() != dfinfo.Size() {
t.Fatalf("Size mismatch source (%v) vs destination(%v)", sfinfo.Size(), dfinfo.Size())
}
if dfinfo.Mode().Perm().String() != "-r-x------" {
t.Fatalf("Permission is not 0500for file: %v", err)
}
}
}
func doHashTest(fs *FileSystem, t *testing.T, ensName string, files ...string) {
createTestFiles(t, files)
bzzhash, err := fs.Upload(testUploadDir, "")
if err != nil {
t.Fatalf("Error uploading directory %v: %v", testUploadDir, err)
}
swarmfs := NewSwarmFS(fs.api)
_ ,err1 := swarmfs.Mount(bzzhash, testMountDir)
if err1 != nil {
t.Fatalf("Error mounting hash %v: %v", bzzhash, err)
}
compareFiles(t, files)
_, err2 := swarmfs.Unmount(testMountDir)
if err2 != nil {
t.Fatalf("Error unmounting path %v: %v", testMountDir, err)
}
swarmfs.Stop()
}
// mounting with manifest Hash
func TestFuseMountingScenarios(t *testing.T) {
testFuseFileSystem(t, func(fs *FileSystem) {
//doHashTest(fs,t, "test","1.txt")
doHashTest(fs, t, "", "1.txt")
doHashTest(fs, t, "", "1.txt", "11.txt", "111.txt", "two/2.txt", "two/two/2.txt", "three/3.txt")
doHashTest(fs, t, "", "1/2/3/4/5/6/7/8/9/10/11/12/1.txt")
doHashTest(fs, t, "", "one/one.txt", "one.txt", "once/one.txt", "one/one/one.txt")
})
}

48
swarm/api/swarmfs_windows.go Normal file
View File

@ -0,0 +1,48 @@
// Copyright 2017 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
// +build windows
package api
import (
"github.com/ethereum/go-ethereum/log"
)
// Dummy struct and functions to satsfy windows build
type MountInfo struct {
}
func (self *SwarmFS) Mount(mhash, mountpoint string) error {
log.Info("Platform not supported")
return nil
}
func (self *SwarmFS) Unmount(mountpoint string) error {
log.Info("Platform not supported")
return nil
}
func (self *SwarmFS) Listmounts() (string, error) {
log.Info("Platform not supported")
return "",nil
}
func (self *SwarmFS) Stop() error {
log.Info("Platform not supported")
return nil
}

15
swarm/swarm.go
View File

@ -53,7 +53,8 @@ type Swarm struct {
privateKey *ecdsa.PrivateKey privateKey *ecdsa.PrivateKey
corsString string corsString string
swapEnabled bool swapEnabled bool
lstore *storage.LocalStore // local store, needs to store for releasing resources after node stopped lstore *storage.LocalStore // local store, needs to store for releasing resources after node stopped
sfs *api.SwarmFS // need this to cleanup all the active mounts on node exit
} }
type SwarmAPI struct { type SwarmAPI struct {
@ -142,6 +143,9 @@ func NewSwarm(ctx *node.ServiceContext, backend chequebook.Backend, config *api.
// Manifests for Smart Hosting // Manifests for Smart Hosting
log.Debug(fmt.Sprintf("-> Web3 virtual server API")) log.Debug(fmt.Sprintf("-> Web3 virtual server API"))
self.sfs = api.NewSwarmFS(self.api)
log.Debug("-> Initializing Fuse file system")
return self, nil return self, nil
} }
@ -216,7 +220,7 @@ func (self *Swarm) Stop() error {
if self.lstore != nil { if self.lstore != nil {
self.lstore.DbStore.Close() self.lstore.DbStore.Close()
} }
self.sfs.Stop()
return self.config.Save() return self.config.Save()
} }
@ -240,6 +244,7 @@ func (self *Swarm) APIs() []rpc.API {
Service: api.NewStorage(self.api), Service: api.NewStorage(self.api),
Public: true, Public: true,
}, },
{ {
Namespace: "bzz", Namespace: "bzz",
Version: "0.1", Version: "0.1",
@ -264,6 +269,12 @@ func (self *Swarm) APIs() []rpc.API {
Service: chequebook.NewApi(self.config.Swap.Chequebook), Service: chequebook.NewApi(self.config.Swap.Chequebook),
Public: false, Public: false,
}, },
{
Namespace: "swarmfs",
Version: api.Swarmfs_Version,
Service: self.sfs,
Public: false,
},
// {Namespace, Version, api.NewAdmin(self), false}, // {Namespace, Version, api.NewAdmin(self), false},
} }
} }

93
vendor/bazil.org/fuse/LICENSE generated vendored Normal file
View File

@ -0,0 +1,93 @@
Copyright (c) 2013-2015 Tommi Virtanen.
Copyright (c) 2009, 2011, 2012 The Go Authors.
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following disclaimer
in the documentation and/or other materials provided with the
distribution.
* Neither the name of Google Inc. nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
The following included software components have additional copyright
notices and license terms that may differ from the above.
File fuse.go:
// Adapted from Plan 9 from User Space's src/cmd/9pfuse/fuse.c,
// which carries this notice:
//
// The files in this directory are subject to the following license.
//
// The author of this software is Russ Cox.
//
// Copyright (c) 2006 Russ Cox
//
// Permission to use, copy, modify, and distribute this software for any
// purpose without fee is hereby granted, provided that this entire notice
// is included in all copies of any software which is or includes a copy
// or modification of this software and in all copies of the supporting
// documentation for such software.
//
// THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED
// WARRANTY. IN PARTICULAR, THE AUTHOR MAKES NO REPRESENTATION OR WARRANTY
// OF ANY KIND CONCERNING THE MERCHANTABILITY OF THIS SOFTWARE OR ITS
// FITNESS FOR ANY PARTICULAR PURPOSE.
File fuse_kernel.go:
// Derived from FUSE's fuse_kernel.h
/*
This file defines the kernel interface of FUSE
Copyright (C) 2001-2007 Miklos Szeredi <miklos@szeredi.hu>
This -- and only this -- header file may also be distributed under
the terms of the BSD Licence as follows:
Copyright (C) 2001-2007 Miklos Szeredi. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
*/

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bazil.org/fuse -- Filesystems in Go
===================================
`bazil.org/fuse` is a Go library for writing FUSE userspace
filesystems.
It is a from-scratch implementation of the kernel-userspace
communication protocol, and does not use the C library from the
project called FUSE. `bazil.org/fuse` embraces Go fully for safety and
ease of programming.
Here’s how to get going:
go get bazil.org/fuse
Website: http://bazil.org/fuse/
Github repository: https://github.com/bazil/fuse
API docs: http://godoc.org/bazil.org/fuse
Our thanks to Russ Cox for his fuse library, which this project is
based on.

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package fuse
import "unsafe"
// buffer provides a mechanism for constructing a message from
// multiple segments.
type buffer []byte
// alloc allocates size bytes and returns a pointer to the new
// segment.
func (w *buffer) alloc(size uintptr) unsafe.Pointer {
s := int(size)
if len(*w)+s > cap(*w) {
old := *w
*w = make([]byte, len(*w), 2*cap(*w)+s)
copy(*w, old)
}
l := len(*w)
*w = (*w)[:l+s]
return unsafe.Pointer(&(*w)[l])
}
// reset clears out the contents of the buffer.
func (w *buffer) reset() {
for i := range (*w)[:cap(*w)] {
(*w)[i] = 0
}
*w = (*w)[:0]
}
func newBuffer(extra uintptr) buffer {
const hdrSize = unsafe.Sizeof(outHeader{})
buf := make(buffer, hdrSize, hdrSize+extra)
return buf
}

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package fuse
import (
"runtime"
)
func stack() string {
buf := make([]byte, 1024)
return string(buf[:runtime.Stack(buf, false)])
}
func nop(msg interface{}) {}
// Debug is called to output debug messages, including protocol
// traces. The default behavior is to do nothing.
//
// The messages have human-friendly string representations and are
// safe to marshal to JSON.
//
// Implementations must not retain msg.
var Debug func(msg interface{}) = nop

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package fuse
import (
"syscall"
)
const (
ENOATTR = Errno(syscall.ENOATTR)
)
const (
errNoXattr = ENOATTR
)
func init() {
errnoNames[errNoXattr] = "ENOATTR"
}

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package fuse
import "syscall"
const (
ENOATTR = Errno(syscall.ENOATTR)
)
const (
errNoXattr = ENOATTR
)
func init() {
errnoNames[errNoXattr] = "ENOATTR"
}

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package fuse
import (
"syscall"
)
const (
ENODATA = Errno(syscall.ENODATA)
)
const (
errNoXattr = ENODATA
)
func init() {
errnoNames[errNoXattr] = "ENODATA"
}

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package fuse
// There is very little commonality in extended attribute errors
// across platforms.
//
// getxattr return value for "extended attribute does not exist" is
// ENOATTR on OS X, and ENODATA on Linux and apparently at least
// NetBSD. There may be a #define ENOATTR on Linux too, but the value
// is ENODATA in the actual syscalls. FreeBSD and OpenBSD have no
// ENODATA, only ENOATTR. ENOATTR is not in any of the standards,
// ENODATA exists but is only used for STREAMs.
//
// Each platform will define it a errNoXattr constant, and this file
// will enforce that it implements the right interfaces and hide the
// implementation.
//
// https://developer.apple.com/library/mac/documentation/Darwin/Reference/ManPages/man2/getxattr.2.html
// http://mail-index.netbsd.org/tech-kern/2012/04/30/msg013090.html
// http://mail-index.netbsd.org/tech-kern/2012/04/30/msg013097.html
// http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/errno.h.html
// http://www.freebsd.org/cgi/man.cgi?query=extattr_get_file&sektion=2
// http://nixdoc.net/man-pages/openbsd/man2/extattr_get_file.2.html
// ErrNoXattr is a platform-independent error value meaning the
// extended attribute was not found. It can be used to respond to
// GetxattrRequest and such.
const ErrNoXattr = errNoXattr
var _ error = ErrNoXattr
var _ Errno = ErrNoXattr
var _ ErrorNumber = ErrNoXattr

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// FUSE directory tree, for servers that wish to use it with the service loop.
package fs
import (
"os"
pathpkg "path"
"strings"
"golang.org/x/net/context"
)
import (
"bazil.org/fuse"
)
// A Tree implements a basic read-only directory tree for FUSE.
// The Nodes contained in it may still be writable.
type Tree struct {
tree
}
func (t *Tree) Root() (Node, error) {
return &t.tree, nil
}
// Add adds the path to the tree, resolving to the given node.
// If path or a prefix of path has already been added to the tree,
// Add panics.
//
// Add is only safe to call before starting to serve requests.
func (t *Tree) Add(path string, node Node) {
path = pathpkg.Clean("/" + path)[1:]
elems := strings.Split(path, "/")
dir := Node(&t.tree)
for i, elem := range elems {
dt, ok := dir.(*tree)
if !ok {
panic("fuse: Tree.Add for " + strings.Join(elems[:i], "/") + " and " + path)
}
n := dt.lookup(elem)
if n != nil {
if i+1 == len(elems) {
panic("fuse: Tree.Add for " + path + " conflicts with " + elem)
}
dir = n
} else {
if i+1 == len(elems) {
dt.add(elem, node)
} else {
dir = &tree{}
dt.add(elem, dir)
}
}
}
}
type treeDir struct {
name string
node Node
}
type tree struct {
dir []treeDir
}
func (t *tree) lookup(name string) Node {
for _, d := range t.dir {
if d.name == name {
return d.node
}
}
return nil
}
func (t *tree) add(name string, n Node) {
t.dir = append(t.dir, treeDir{name, n})
}
func (t *tree) Attr(ctx context.Context, a *fuse.Attr) error {
a.Mode = os.ModeDir | 0555
return nil
}
func (t *tree) Lookup(ctx context.Context, name string) (Node, error) {
n := t.lookup(name)
if n != nil {
return n, nil
}
return nil, fuse.ENOENT
}
func (t *tree) ReadDirAll(ctx context.Context) ([]fuse.Dirent, error) {
var out []fuse.Dirent
for _, d := range t.dir {
out = append(out, fuse.Dirent{Name: d.name})
}
return out, nil
}

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<?xml version="1.0" encoding="UTF-8"?>
<module type="GO_MODULE" version="4">
<component name="NewModuleRootManager" inherit-compiler-output="true">
<exclude-output />
<content url="file://$MODULE_DIR$" />
<orderEntry type="inheritedJdk" />
<orderEntry type="sourceFolder" forTests="false" />
</component>
</module>

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package fuse
// Maximum file write size we are prepared to receive from the kernel.
//
// This value has to be >=16MB or OSXFUSE (3.4.0 observed) will
// forcibly close the /dev/fuse file descriptor on a Setxattr with a
// 16MB value. See TestSetxattr16MB and
// https://github.com/bazil/fuse/issues/42
const maxWrite = 16 * 1024 * 1024

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package fuse
// Maximum file write size we are prepared to receive from the kernel.
//
// This number is just a guess.
const maxWrite = 128 * 1024

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// See the file LICENSE for copyright and licensing information.
// Derived from FUSE's fuse_kernel.h, which carries this notice:
/*
This file defines the kernel interface of FUSE
Copyright (C) 2001-2007 Miklos Szeredi <miklos@szeredi.hu>
This -- and only this -- header file may also be distributed under
the terms of the BSD Licence as follows:
Copyright (C) 2001-2007 Miklos Szeredi. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
*/
package fuse
import (
"fmt"
"syscall"
"unsafe"
)
// The FUSE version implemented by the package.
const (
protoVersionMinMajor = 7
protoVersionMinMinor = 8
protoVersionMaxMajor = 7
protoVersionMaxMinor = 12
)
const (
rootID = 1
)
type kstatfs struct {
Blocks uint64
Bfree uint64
Bavail uint64
Files uint64
Ffree uint64
Bsize uint32
Namelen uint32
Frsize uint32
_ uint32
Spare [6]uint32
}
type fileLock struct {
Start uint64
End uint64
Type uint32
Pid uint32
}
// GetattrFlags are bit flags that can be seen in GetattrRequest.
type GetattrFlags uint32
const (
// Indicates the handle is valid.
GetattrFh GetattrFlags = 1 << 0
)
var getattrFlagsNames = []flagName{
{uint32(GetattrFh), "GetattrFh"},
}
func (fl GetattrFlags) String() string {
return flagString(uint32(fl), getattrFlagsNames)
}
// The SetattrValid are bit flags describing which fields in the SetattrRequest
// are included in the change.
type SetattrValid uint32
const (
SetattrMode SetattrValid = 1 << 0
SetattrUid SetattrValid = 1 << 1
SetattrGid SetattrValid = 1 << 2
SetattrSize SetattrValid = 1 << 3
SetattrAtime SetattrValid = 1 << 4
SetattrMtime SetattrValid = 1 << 5
SetattrHandle SetattrValid = 1 << 6
// Linux only(?)
SetattrAtimeNow SetattrValid = 1 << 7
SetattrMtimeNow SetattrValid = 1 << 8
SetattrLockOwner SetattrValid = 1 << 9 // http://www.mail-archive.com/git-commits-head@vger.kernel.org/msg27852.html
// OS X only
SetattrCrtime SetattrValid = 1 << 28
SetattrChgtime SetattrValid = 1 << 29
SetattrBkuptime SetattrValid = 1 << 30
SetattrFlags SetattrValid = 1 << 31
)
func (fl SetattrValid) Mode() bool { return fl&SetattrMode != 0 }
func (fl SetattrValid) Uid() bool { return fl&SetattrUid != 0 }
func (fl SetattrValid) Gid() bool { return fl&SetattrGid != 0 }
func (fl SetattrValid) Size() bool { return fl&SetattrSize != 0 }
func (fl SetattrValid) Atime() bool { return fl&SetattrAtime != 0 }
func (fl SetattrValid) Mtime() bool { return fl&SetattrMtime != 0 }
func (fl SetattrValid) Handle() bool { return fl&SetattrHandle != 0 }
func (fl SetattrValid) AtimeNow() bool { return fl&SetattrAtimeNow != 0 }
func (fl SetattrValid) MtimeNow() bool { return fl&SetattrMtimeNow != 0 }
func (fl SetattrValid) LockOwner() bool { return fl&SetattrLockOwner != 0 }
func (fl SetattrValid) Crtime() bool { return fl&SetattrCrtime != 0 }
func (fl SetattrValid) Chgtime() bool { return fl&SetattrChgtime != 0 }
func (fl SetattrValid) Bkuptime() bool { return fl&SetattrBkuptime != 0 }
func (fl SetattrValid) Flags() bool { return fl&SetattrFlags != 0 }
func (fl SetattrValid) String() string {
return flagString(uint32(fl), setattrValidNames)
}
var setattrValidNames = []flagName{
{uint32(SetattrMode), "SetattrMode"},
{uint32(SetattrUid), "SetattrUid"},
{uint32(SetattrGid), "SetattrGid"},
{uint32(SetattrSize), "SetattrSize"},
{uint32(SetattrAtime), "SetattrAtime"},
{uint32(SetattrMtime), "SetattrMtime"},
{uint32(SetattrHandle), "SetattrHandle"},
{uint32(SetattrAtimeNow), "SetattrAtimeNow"},
{uint32(SetattrMtimeNow), "SetattrMtimeNow"},
{uint32(SetattrLockOwner), "SetattrLockOwner"},
{uint32(SetattrCrtime), "SetattrCrtime"},
{uint32(SetattrChgtime), "SetattrChgtime"},
{uint32(SetattrBkuptime), "SetattrBkuptime"},
{uint32(SetattrFlags), "SetattrFlags"},
}
// Flags that can be seen in OpenRequest.Flags.
const (
// Access modes. These are not 1-bit flags, but alternatives where
// only one can be chosen. See the IsReadOnly etc convenience
// methods.
OpenReadOnly OpenFlags = syscall.O_RDONLY
OpenWriteOnly OpenFlags = syscall.O_WRONLY
OpenReadWrite OpenFlags = syscall.O_RDWR
// File was opened in append-only mode, all writes will go to end
// of file. OS X does not provide this information.
OpenAppend OpenFlags = syscall.O_APPEND
OpenCreate OpenFlags = syscall.O_CREAT
OpenDirectory OpenFlags = syscall.O_DIRECTORY
OpenExclusive OpenFlags = syscall.O_EXCL
OpenNonblock OpenFlags = syscall.O_NONBLOCK
OpenSync OpenFlags = syscall.O_SYNC
OpenTruncate OpenFlags = syscall.O_TRUNC
)
// OpenAccessModeMask is a bitmask that separates the access mode
// from the other flags in OpenFlags.
const OpenAccessModeMask OpenFlags = syscall.O_ACCMODE
// OpenFlags are the O_FOO flags passed to open/create/etc calls. For
// example, os.O_WRONLY | os.O_APPEND.
type OpenFlags uint32
func (fl OpenFlags) String() string {
// O_RDONLY, O_RWONLY, O_RDWR are not flags
s := accModeName(fl & OpenAccessModeMask)
flags := uint32(fl &^ OpenAccessModeMask)
if flags != 0 {
s = s + "+" + flagString(flags, openFlagNames)
}
return s
}
// Return true if OpenReadOnly is set.
func (fl OpenFlags) IsReadOnly() bool {
return fl&OpenAccessModeMask == OpenReadOnly
}
// Return true if OpenWriteOnly is set.
func (fl OpenFlags) IsWriteOnly() bool {
return fl&OpenAccessModeMask == OpenWriteOnly
}
// Return true if OpenReadWrite is set.
func (fl OpenFlags) IsReadWrite() bool {
return fl&OpenAccessModeMask == OpenReadWrite
}
func accModeName(flags OpenFlags) string {
switch flags {
case OpenReadOnly:
return "OpenReadOnly"
case OpenWriteOnly:
return "OpenWriteOnly"
case OpenReadWrite:
return "OpenReadWrite"
default:
return ""
}
}
var openFlagNames = []flagName{
{uint32(OpenAppend), "OpenAppend"},
{uint32(OpenCreate), "OpenCreate"},
{uint32(OpenDirectory), "OpenDirectory"},
{uint32(OpenExclusive), "OpenExclusive"},
{uint32(OpenNonblock), "OpenNonblock"},
{uint32(OpenSync), "OpenSync"},
{uint32(OpenTruncate), "OpenTruncate"},
}
// The OpenResponseFlags are returned in the OpenResponse.
type OpenResponseFlags uint32
const (
OpenDirectIO OpenResponseFlags = 1 << 0 // bypass page cache for this open file
OpenKeepCache OpenResponseFlags = 1 << 1 // don't invalidate the data cache on open
OpenNonSeekable OpenResponseFlags = 1 << 2 // mark the file as non-seekable (not supported on OS X)
OpenPurgeAttr OpenResponseFlags = 1 << 30 // OS X
OpenPurgeUBC OpenResponseFlags = 1 << 31 // OS X
)
func (fl OpenResponseFlags) String() string {
return flagString(uint32(fl), openResponseFlagNames)
}
var openResponseFlagNames = []flagName{
{uint32(OpenDirectIO), "OpenDirectIO"},
{uint32(OpenKeepCache), "OpenKeepCache"},
{uint32(OpenNonSeekable), "OpenNonSeekable"},
{uint32(OpenPurgeAttr), "OpenPurgeAttr"},
{uint32(OpenPurgeUBC), "OpenPurgeUBC"},
}
// The InitFlags are used in the Init exchange.
type InitFlags uint32
const (
InitAsyncRead InitFlags = 1 << 0
InitPosixLocks InitFlags = 1 << 1
InitFileOps InitFlags = 1 << 2
InitAtomicTrunc InitFlags = 1 << 3
InitExportSupport InitFlags = 1 << 4
InitBigWrites InitFlags = 1 << 5
// Do not mask file access modes with umask. Not supported on OS X.
InitDontMask InitFlags = 1 << 6
InitSpliceWrite InitFlags = 1 << 7
InitSpliceMove InitFlags = 1 << 8
InitSpliceRead InitFlags = 1 << 9
InitFlockLocks InitFlags = 1 << 10
InitHasIoctlDir InitFlags = 1 << 11
InitAutoInvalData InitFlags = 1 << 12
InitDoReaddirplus InitFlags = 1 << 13
InitReaddirplusAuto InitFlags = 1 << 14
InitAsyncDIO InitFlags = 1 << 15
InitWritebackCache InitFlags = 1 << 16
InitNoOpenSupport InitFlags = 1 << 17
InitCaseSensitive InitFlags = 1 << 29 // OS X only
InitVolRename InitFlags = 1 << 30 // OS X only
InitXtimes InitFlags = 1 << 31 // OS X only
)
type flagName struct {
bit uint32
name string
}
var initFlagNames = []flagName{
{uint32(InitAsyncRead), "InitAsyncRead"},
{uint32(InitPosixLocks), "InitPosixLocks"},
{uint32(InitFileOps), "InitFileOps"},
{uint32(InitAtomicTrunc), "InitAtomicTrunc"},
{uint32(InitExportSupport), "InitExportSupport"},
{uint32(InitBigWrites), "InitBigWrites"},
{uint32(InitDontMask), "InitDontMask"},
{uint32(InitSpliceWrite), "InitSpliceWrite"},
{uint32(InitSpliceMove), "InitSpliceMove"},
{uint32(InitSpliceRead), "InitSpliceRead"},
{uint32(InitFlockLocks), "InitFlockLocks"},
{uint32(InitHasIoctlDir), "InitHasIoctlDir"},
{uint32(InitAutoInvalData), "InitAutoInvalData"},
{uint32(InitDoReaddirplus), "InitDoReaddirplus"},
{uint32(InitReaddirplusAuto), "InitReaddirplusAuto"},
{uint32(InitAsyncDIO), "InitAsyncDIO"},
{uint32(InitWritebackCache), "InitWritebackCache"},
{uint32(InitNoOpenSupport), "InitNoOpenSupport"},
{uint32(InitCaseSensitive), "InitCaseSensitive"},
{uint32(InitVolRename), "InitVolRename"},
{uint32(InitXtimes), "InitXtimes"},
}
func (fl InitFlags) String() string {
return flagString(uint32(fl), initFlagNames)
}
func flagString(f uint32, names []flagName) string {
var s string
if f == 0 {
return "0"
}
for _, n := range names {
if f&n.bit != 0 {
s += "+" + n.name
f &^= n.bit
}
}
if f != 0 {
s += fmt.Sprintf("%+#x", f)
}
return s[1:]
}
// The ReleaseFlags are used in the Release exchange.
type ReleaseFlags uint32
const (
ReleaseFlush ReleaseFlags = 1 << 0
)
func (fl ReleaseFlags) String() string {
return flagString(uint32(fl), releaseFlagNames)
}
var releaseFlagNames = []flagName{
{uint32(ReleaseFlush), "ReleaseFlush"},
}
// Opcodes
const (
opLookup = 1
opForget = 2 // no reply
opGetattr = 3
opSetattr = 4
opReadlink = 5
opSymlink = 6
opMknod = 8
opMkdir = 9
opUnlink = 10
opRmdir = 11
opRename = 12
opLink = 13
opOpen = 14
opRead = 15
opWrite = 16
opStatfs = 17
opRelease = 18
opFsync = 20
opSetxattr = 21
opGetxattr = 22
opListxattr = 23
opRemovexattr = 24
opFlush = 25
opInit = 26
opOpendir = 27
opReaddir = 28
opReleasedir = 29
opFsyncdir = 30
opGetlk = 31
opSetlk = 32
opSetlkw = 33
opAccess = 34
opCreate = 35
opInterrupt = 36
opBmap = 37
opDestroy = 38
opIoctl = 39 // Linux?
opPoll = 40 // Linux?
// OS X
opSetvolname = 61
opGetxtimes = 62
opExchange = 63
)
type entryOut struct {
Nodeid uint64 // Inode ID
Generation uint64 // Inode generation
EntryValid uint64 // Cache timeout for the name
AttrValid uint64 // Cache timeout for the attributes
EntryValidNsec uint32
AttrValidNsec uint32
Attr attr
}
func entryOutSize(p Protocol) uintptr {
switch {
case p.LT(Protocol{7, 9}):
return unsafe.Offsetof(entryOut{}.Attr) + unsafe.Offsetof(entryOut{}.Attr.Blksize)
default:
return unsafe.Sizeof(entryOut{})
}
}
type forgetIn struct {
Nlookup uint64
}
type getattrIn struct {
GetattrFlags uint32
_ uint32
Fh uint64
}
type attrOut struct {
AttrValid uint64 // Cache timeout for the attributes
AttrValidNsec uint32
_ uint32
Attr attr
}
func attrOutSize(p Protocol) uintptr {
switch {
case p.LT(Protocol{7, 9}):
return unsafe.Offsetof(attrOut{}.Attr) + unsafe.Offsetof(attrOut{}.Attr.Blksize)
default:
return unsafe.Sizeof(attrOut{})
}
}
// OS X
type getxtimesOut struct {
Bkuptime uint64
Crtime uint64
BkuptimeNsec uint32
CrtimeNsec uint32
}
type mknodIn struct {
Mode uint32
Rdev uint32
Umask uint32
_ uint32
// "filename\x00" follows.
}
func mknodInSize(p Protocol) uintptr {
switch {
case p.LT(Protocol{7, 12}):
return unsafe.Offsetof(mknodIn{}.Umask)
default:
return unsafe.Sizeof(mknodIn{})
}
}
type mkdirIn struct {
Mode uint32
Umask uint32
// filename follows
}
func mkdirInSize(p Protocol) uintptr {
switch {
case p.LT(Protocol{7, 12}):
return unsafe.Offsetof(mkdirIn{}.Umask) + 4
default:
return unsafe.Sizeof(mkdirIn{})
}
}
type renameIn struct {
Newdir uint64
// "oldname\x00newname\x00" follows
}
// OS X
type exchangeIn struct {
Olddir uint64
Newdir uint64
Options uint64
// "oldname\x00newname\x00" follows
}
type linkIn struct {
Oldnodeid uint64
}
type setattrInCommon struct {
Valid uint32
_ uint32
Fh uint64
Size uint64
LockOwner uint64 // unused on OS X?
Atime uint64
Mtime uint64
Unused2 uint64
AtimeNsec uint32
MtimeNsec uint32
Unused3 uint32
Mode uint32
Unused4 uint32
Uid uint32
Gid uint32
Unused5 uint32
}
type openIn struct {
Flags uint32
Unused uint32
}
type openOut struct {
Fh uint64
OpenFlags uint32
_ uint32
}
type createIn struct {
Flags uint32
Mode uint32
Umask uint32
_ uint32
}
func createInSize(p Protocol) uintptr {
switch {
case p.LT(Protocol{7, 12}):
return unsafe.Offsetof(createIn{}.Umask)
default:
return unsafe.Sizeof(createIn{})
}
}
type releaseIn struct {
Fh uint64
Flags uint32
ReleaseFlags uint32
LockOwner uint32
}
type flushIn struct {
Fh uint64
FlushFlags uint32
_ uint32
LockOwner uint64
}
type readIn struct {
Fh uint64
Offset uint64
Size uint32
ReadFlags uint32
LockOwner uint64
Flags uint32
_ uint32
}
func readInSize(p Protocol) uintptr {
switch {
case p.LT(Protocol{7, 9}):
return unsafe.Offsetof(readIn{}.ReadFlags) + 4
default:
return unsafe.Sizeof(readIn{})
}
}
// The ReadFlags are passed in ReadRequest.
type ReadFlags uint32
const (
// LockOwner field is valid.
ReadLockOwner ReadFlags = 1 << 1
)
var readFlagNames = []flagName{
{uint32(ReadLockOwner), "ReadLockOwner"},
}
func (fl ReadFlags) String() string {
return flagString(uint32(fl), readFlagNames)
}
type writeIn struct {
Fh uint64
Offset uint64
Size uint32
WriteFlags uint32
LockOwner uint64
Flags uint32
_ uint32
}
func writeInSize(p Protocol) uintptr {
switch {
case p.LT(Protocol{7, 9}):
return unsafe.Offsetof(writeIn{}.LockOwner)
default:
return unsafe.Sizeof(writeIn{})
}
}
type writeOut struct {
Size uint32
_ uint32
}
// The WriteFlags are passed in WriteRequest.
type WriteFlags uint32
const (
WriteCache WriteFlags = 1 << 0
// LockOwner field is valid.
WriteLockOwner WriteFlags = 1 << 1
)
var writeFlagNames = []flagName{
{uint32(WriteCache), "WriteCache"},
{uint32(WriteLockOwner), "WriteLockOwner"},
}
func (fl WriteFlags) String() string {
return flagString(uint32(fl), writeFlagNames)
}
const compatStatfsSize = 48
type statfsOut struct {
St kstatfs
}
type fsyncIn struct {
Fh uint64
FsyncFlags uint32
_ uint32
}
type setxattrInCommon struct {
Size uint32
Flags uint32
}
func (setxattrInCommon) position() uint32 {
return 0
}
type getxattrInCommon struct {
Size uint32
_ uint32
}
func (getxattrInCommon) position() uint32 {
return 0
}
type getxattrOut struct {
Size uint32
_ uint32
}
type lkIn struct {
Fh uint64
Owner uint64
Lk fileLock
LkFlags uint32
_ uint32
}
func lkInSize(p Protocol) uintptr {
switch {
case p.LT(Protocol{7, 9}):
return unsafe.Offsetof(lkIn{}.LkFlags)
default:
return unsafe.Sizeof(lkIn{})
}
}
type lkOut struct {
Lk fileLock
}
type accessIn struct {
Mask uint32
_ uint32
}
type initIn struct {
Major uint32
Minor uint32
MaxReadahead uint32
Flags uint32
}
const initInSize = int(unsafe.Sizeof(initIn{}))
type initOut struct {
Major uint32
Minor uint32
MaxReadahead uint32
Flags uint32
Unused uint32
MaxWrite uint32
}
type interruptIn struct {
Unique uint64
}
type bmapIn struct {
Block uint64
BlockSize uint32
_ uint32
}
type bmapOut struct {
Block uint64
}
type inHeader struct {
Len uint32
Opcode uint32
Unique uint64
Nodeid uint64
Uid uint32
Gid uint32
Pid uint32
_ uint32
}
const inHeaderSize = int(unsafe.Sizeof(inHeader{}))
type outHeader struct {
Len uint32
Error int32
Unique uint64
}
type dirent struct {
Ino uint64
Off uint64
Namelen uint32
Type uint32
Name [0]byte
}
const direntSize = 8 + 8 + 4 + 4
const (
notifyCodePoll int32 = 1
notifyCodeInvalInode int32 = 2
notifyCodeInvalEntry int32 = 3
)
type notifyInvalInodeOut struct {
Ino uint64
Off int64
Len int64
}
type notifyInvalEntryOut struct {
Parent uint64
Namelen uint32
_ uint32
}

88
vendor/bazil.org/fuse/fuse_kernel_darwin.go generated vendored Normal file
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package fuse
import (
"time"
)
type attr struct {
Ino uint64
Size uint64
Blocks uint64
Atime uint64
Mtime uint64
Ctime uint64
Crtime_ uint64 // OS X only
AtimeNsec uint32
MtimeNsec uint32
CtimeNsec uint32
CrtimeNsec uint32 // OS X only
Mode uint32
Nlink uint32
Uid uint32
Gid uint32
Rdev uint32
Flags_ uint32 // OS X only; see chflags(2)
Blksize uint32
padding uint32
}
func (a *attr) SetCrtime(s uint64, ns uint32) {
a.Crtime_, a.CrtimeNsec = s, ns
}
func (a *attr) SetFlags(f uint32) {
a.Flags_ = f
}
type setattrIn struct {
setattrInCommon
// OS X only
Bkuptime_ uint64
Chgtime_ uint64
Crtime uint64
BkuptimeNsec uint32
ChgtimeNsec uint32
CrtimeNsec uint32
Flags_ uint32 // see chflags(2)
}
func (in *setattrIn) BkupTime() time.Time {
return time.Unix(int64(in.Bkuptime_), int64(in.BkuptimeNsec))
}
func (in *setattrIn) Chgtime() time.Time {
return time.Unix(int64(in.Chgtime_), int64(in.ChgtimeNsec))
}
func (in *setattrIn) Flags() uint32 {
return in.Flags_
}
func openFlags(flags uint32) OpenFlags {
return OpenFlags(flags)
}
type getxattrIn struct {
getxattrInCommon
// OS X only
Position uint32
Padding uint32
}
func (g *getxattrIn) position() uint32 {
return g.Position
}
type setxattrIn struct {
setxattrInCommon
// OS X only
Position uint32
Padding uint32
}
func (s *setxattrIn) position() uint32 {
return s.Position
}

62
vendor/bazil.org/fuse/fuse_kernel_freebsd.go generated vendored Normal file
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@ -0,0 +1,62 @@
package fuse
import "time"
type attr struct {
Ino uint64
Size uint64
Blocks uint64
Atime uint64
Mtime uint64
Ctime uint64
AtimeNsec uint32
MtimeNsec uint32
CtimeNsec uint32
Mode uint32
Nlink uint32
Uid uint32
Gid uint32
Rdev uint32
Blksize uint32
padding uint32
}
func (a *attr) Crtime() time.Time {
return time.Time{}
}
func (a *attr) SetCrtime(s uint64, ns uint32) {
// ignored on freebsd
}
func (a *attr) SetFlags(f uint32) {
// ignored on freebsd
}
type setattrIn struct {
setattrInCommon
}
func (in *setattrIn) BkupTime() time.Time {
return time.Time{}
}
func (in *setattrIn) Chgtime() time.Time {
return time.Time{}
}
func (in *setattrIn) Flags() uint32 {
return 0
}
func openFlags(flags uint32) OpenFlags {
return OpenFlags(flags)
}
type getxattrIn struct {
getxattrInCommon
}
type setxattrIn struct {
setxattrInCommon
}

70
vendor/bazil.org/fuse/fuse_kernel_linux.go generated vendored Normal file
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@ -0,0 +1,70 @@
package fuse
import "time"
type attr struct {
Ino uint64
Size uint64
Blocks uint64
Atime uint64
Mtime uint64
Ctime uint64
AtimeNsec uint32
MtimeNsec uint32
CtimeNsec uint32
Mode uint32
Nlink uint32
Uid uint32
Gid uint32
Rdev uint32
Blksize uint32
padding uint32
}
func (a *attr) Crtime() time.Time {
return time.Time{}
}
func (a *attr) SetCrtime(s uint64, ns uint32) {
// Ignored on Linux.
}
func (a *attr) SetFlags(f uint32) {
// Ignored on Linux.
}
type setattrIn struct {
setattrInCommon
}
func (in *setattrIn) BkupTime() time.Time {
return time.Time{}
}
func (in *setattrIn) Chgtime() time.Time {
return time.Time{}
}
func (in *setattrIn) Flags() uint32 {
return 0
}
func openFlags(flags uint32) OpenFlags {
// on amd64, the 32-bit O_LARGEFILE flag is always seen;
// on i386, the flag probably depends on the app
// requesting, but in any case should be utterly
// uninteresting to us here; our kernel protocol messages
// are not directly related to the client app's kernel
// API/ABI
flags &^= 0x8000
return OpenFlags(flags)
}
type getxattrIn struct {
getxattrInCommon
}
type setxattrIn struct {
setxattrInCommon
}

1
vendor/bazil.org/fuse/fuse_kernel_std.go generated vendored Normal file
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@ -0,0 +1 @@
package fuse

7
vendor/bazil.org/fuse/fuse_linux.go generated vendored Normal file
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@ -0,0 +1,7 @@
package fuse
// Maximum file write size we are prepared to receive from the kernel.
//
// Linux 4.2.0 has been observed to cap this value at 128kB
// (FUSE_MAX_PAGES_PER_REQ=32, 4kB pages).
const maxWrite = 128 * 1024

20
vendor/bazil.org/fuse/fuseutil/fuseutil.go generated vendored Normal file
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@ -0,0 +1,20 @@
package fuseutil // import "bazil.org/fuse/fuseutil"
import (
"bazil.org/fuse"
)
// HandleRead handles a read request assuming that data is the entire file content.
// It adjusts the amount returned in resp according to req.Offset and req.Size.
func HandleRead(req *fuse.ReadRequest, resp *fuse.ReadResponse, data []byte) {
if req.Offset >= int64(len(data)) {
data = nil
} else {
data = data[req.Offset:]
}
if len(data) > req.Size {
data = data[:req.Size]
}
n := copy(resp.Data[:req.Size], data)
resp.Data = resp.Data[:n]
}

38
vendor/bazil.org/fuse/mount.go generated vendored Normal file
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@ -0,0 +1,38 @@
package fuse
import (
"bufio"
"errors"
"io"
"log"
"sync"
)
var (
// ErrOSXFUSENotFound is returned from Mount when the OSXFUSE
// installation is not detected.
//
// Only happens on OS X. Make sure OSXFUSE is installed, or see
// OSXFUSELocations for customization.
ErrOSXFUSENotFound = errors.New("cannot locate OSXFUSE")
)
func neverIgnoreLine(line string) bool {
return false
}
func lineLogger(wg *sync.WaitGroup, prefix string, ignore func(line string) bool, r io.ReadCloser) {
defer wg.Done()
scanner := bufio.NewScanner(r)
for scanner.Scan() {
line := scanner.Text()
if ignore(line) {
continue
}
log.Printf("%s: %s", prefix, line)
}
if err := scanner.Err(); err != nil {
log.Printf("%s, error reading: %v", prefix, err)
}
}

208
vendor/bazil.org/fuse/mount_darwin.go generated vendored Normal file
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@ -0,0 +1,208 @@
package fuse
import (
"errors"
"fmt"
"log"
"os"
"os/exec"
"path"
"strconv"
"strings"
"sync"
"syscall"
)
var (
errNoAvail = errors.New("no available fuse devices")
errNotLoaded = errors.New("osxfuse is not loaded")
)
func loadOSXFUSE(bin string) error {
cmd := exec.Command(bin)
cmd.Dir = "/"
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
err := cmd.Run()
return err
}
func openOSXFUSEDev(devPrefix string) (*os.File, error) {
var f *os.File
var err error
for i := uint64(0); ; i++ {
path := devPrefix + strconv.FormatUint(i, 10)
f, err = os.OpenFile(path, os.O_RDWR, 0000)
if os.IsNotExist(err) {
if i == 0 {
// not even the first device was found -> fuse is not loaded
return nil, errNotLoaded
}
// we've run out of kernel-provided devices
return nil, errNoAvail
}
if err2, ok := err.(*os.PathError); ok && err2.Err == syscall.EBUSY {
// try the next one
continue
}
if err != nil {
return nil, err
}
return f, nil
}
}
func handleMountOSXFUSE(helperName string, errCh chan<- error) func(line string) (ignore bool) {
var noMountpointPrefix = helperName + `: `
const noMountpointSuffix = `: No such file or directory`
return func(line string) (ignore bool) {
if strings.HasPrefix(line, noMountpointPrefix) && strings.HasSuffix(line, noMountpointSuffix) {
// re-extract it from the error message in case some layer
// changed the path
mountpoint := line[len(noMountpointPrefix) : len(line)-len(noMountpointSuffix)]
err := &MountpointDoesNotExistError{
Path: mountpoint,
}
select {
case errCh <- err:
return true
default:
// not the first error; fall back to logging it
return false
}
}
return false
}
}
// isBoringMountOSXFUSEError returns whether the Wait error is
// uninteresting; exit status 64 is.
func isBoringMountOSXFUSEError(err error) bool {
if err, ok := err.(*exec.ExitError); ok && err.Exited() {
if status, ok := err.Sys().(syscall.WaitStatus); ok && status.ExitStatus() == 64 {
return true
}
}
return false
}
func callMount(bin string, daemonVar string, dir string, conf *mountConfig, f *os.File, ready chan<- struct{}, errp *error) error {
for k, v := range conf.options {
if strings.Contains(k, ",") || strings.Contains(v, ",") {
// Silly limitation but the mount helper does not
// understand any escaping. See TestMountOptionCommaError.
return fmt.Errorf("mount options cannot contain commas on darwin: %q=%q", k, v)
}
}
cmd := exec.Command(
bin,
"-o", conf.getOptions(),
// Tell osxfuse-kext how large our buffer is. It must split
// writes larger than this into multiple writes.
//
// OSXFUSE seems to ignore InitResponse.MaxWrite, and uses
// this instead.
"-o", "iosize="+strconv.FormatUint(maxWrite, 10),
// refers to fd passed in cmd.ExtraFiles
"3",
dir,
)
cmd.ExtraFiles = []*os.File{f}
cmd.Env = os.Environ()
// OSXFUSE <3.3.0
cmd.Env = append(cmd.Env, "MOUNT_FUSEFS_CALL_BY_LIB=")
// OSXFUSE >=3.3.0
cmd.Env = append(cmd.Env, "MOUNT_OSXFUSE_CALL_BY_LIB=")
daemon := os.Args[0]
if daemonVar != "" {
cmd.Env = append(cmd.Env, daemonVar+"="+daemon)
}
stdout, err := cmd.StdoutPipe()
if err != nil {
return fmt.Errorf("setting up mount_osxfusefs stderr: %v", err)
}
stderr, err := cmd.StderrPipe()
if err != nil {
return fmt.Errorf("setting up mount_osxfusefs stderr: %v", err)
}
if err := cmd.Start(); err != nil {
return fmt.Errorf("mount_osxfusefs: %v", err)
}
helperErrCh := make(chan error, 1)
go func() {
var wg sync.WaitGroup
wg.Add(2)
go lineLogger(&wg, "mount helper output", neverIgnoreLine, stdout)
helperName := path.Base(bin)
go lineLogger(&wg, "mount helper error", handleMountOSXFUSE(helperName, helperErrCh), stderr)
wg.Wait()
if err := cmd.Wait(); err != nil {
// see if we have a better error to report
select {
case helperErr := <-helperErrCh:
// log the Wait error if it's not what we expected
if !isBoringMountOSXFUSEError(err) {
log.Printf("mount helper failed: %v", err)
}
// and now return what we grabbed from stderr as the real
// error
*errp = helperErr
close(ready)
return
default:
// nope, fall back to generic message
}
*errp = fmt.Errorf("mount_osxfusefs: %v", err)
close(ready)
return
}
*errp = nil
close(ready)
}()
return nil
}
func mount(dir string, conf *mountConfig, ready chan<- struct{}, errp *error) (*os.File, error) {
locations := conf.osxfuseLocations
if locations == nil {
locations = []OSXFUSEPaths{
OSXFUSELocationV3,
OSXFUSELocationV2,
}
}
for _, loc := range locations {
if _, err := os.Stat(loc.Mount); os.IsNotExist(err) {
// try the other locations
continue
}
f, err := openOSXFUSEDev(loc.DevicePrefix)
if err == errNotLoaded {
err = loadOSXFUSE(loc.Load)
if err != nil {
return nil, err
}
// try again
f, err = openOSXFUSEDev(loc.DevicePrefix)
}
if err != nil {
return nil, err
}
err = callMount(loc.Mount, loc.DaemonVar, dir, conf, f, ready, errp)
if err != nil {
f.Close()
return nil, err
}
return f, nil
}
return nil, ErrOSXFUSENotFound
}

111
vendor/bazil.org/fuse/mount_freebsd.go generated vendored Normal file
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package fuse
import (
"fmt"
"log"
"os"
"os/exec"
"strings"
"sync"
"syscall"
)
func handleMountFusefsStderr(errCh chan<- error) func(line string) (ignore bool) {
return func(line string) (ignore bool) {
const (
noMountpointPrefix = `mount_fusefs: `
noMountpointSuffix = `: No such file or directory`
)
if strings.HasPrefix(line, noMountpointPrefix) && strings.HasSuffix(line, noMountpointSuffix) {
// re-extract it from the error message in case some layer
// changed the path
mountpoint := line[len(noMountpointPrefix) : len(line)-len(noMountpointSuffix)]
err := &MountpointDoesNotExistError{
Path: mountpoint,
}
select {
case errCh <- err:
return true
default:
// not the first error; fall back to logging it
return false
}
}
return false
}
}
// isBoringMountFusefsError returns whether the Wait error is
// uninteresting; exit status 1 is.
func isBoringMountFusefsError(err error) bool {
if err, ok := err.(*exec.ExitError); ok && err.Exited() {
if status, ok := err.Sys().(syscall.WaitStatus); ok && status.ExitStatus() == 1 {
return true
}
}
return false
}
func mount(dir string, conf *mountConfig, ready chan<- struct{}, errp *error) (*os.File, error) {
for k, v := range conf.options {
if strings.Contains(k, ",") || strings.Contains(v, ",") {
// Silly limitation but the mount helper does not
// understand any escaping. See TestMountOptionCommaError.
return nil, fmt.Errorf("mount options cannot contain commas on FreeBSD: %q=%q", k, v)
}
}
f, err := os.OpenFile("/dev/fuse", os.O_RDWR, 0000)
if err != nil {
*errp = err
return nil, err
}
cmd := exec.Command(
"/sbin/mount_fusefs",
"--safe",
"-o", conf.getOptions(),
"3",
dir,
)
cmd.ExtraFiles = []*os.File{f}
stdout, err := cmd.StdoutPipe()
if err != nil {
return nil, fmt.Errorf("setting up mount_fusefs stderr: %v", err)
}
stderr, err := cmd.StderrPipe()
if err != nil {
return nil, fmt.Errorf("setting up mount_fusefs stderr: %v", err)
}
if err := cmd.Start(); err != nil {
return nil, fmt.Errorf("mount_fusefs: %v", err)
}
helperErrCh := make(chan error, 1)
var wg sync.WaitGroup
wg.Add(2)
go lineLogger(&wg, "mount helper output", neverIgnoreLine, stdout)
go lineLogger(&wg, "mount helper error", handleMountFusefsStderr(helperErrCh), stderr)
wg.Wait()
if err := cmd.Wait(); err != nil {
// see if we have a better error to report
select {
case helperErr := <-helperErrCh:
// log the Wait error if it's not what we expected
if !isBoringMountFusefsError(err) {
log.Printf("mount helper failed: %v", err)
}
// and now return what we grabbed from stderr as the real
// error
return nil, helperErr
default:
// nope, fall back to generic message
}
return nil, fmt.Errorf("mount_fusefs: %v", err)
}
close(ready)
return f, nil
}

150
vendor/bazil.org/fuse/mount_linux.go generated vendored Normal file
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@ -0,0 +1,150 @@
package fuse
import (
"fmt"
"log"
"net"
"os"
"os/exec"
"strings"
"sync"
"syscall"
)
func handleFusermountStderr(errCh chan<- error) func(line string) (ignore bool) {
return func(line string) (ignore bool) {
if line == `fusermount: failed to open /etc/fuse.conf: Permission denied` {
// Silence this particular message, it occurs way too
// commonly and isn't very relevant to whether the mount
// succeeds or not.
return true
}
const (
noMountpointPrefix = `fusermount: failed to access mountpoint `
noMountpointSuffix = `: No such file or directory`
)
if strings.HasPrefix(line, noMountpointPrefix) && strings.HasSuffix(line, noMountpointSuffix) {
// re-extract it from the error message in case some layer
// changed the path
mountpoint := line[len(noMountpointPrefix) : len(line)-len(noMountpointSuffix)]
err := &MountpointDoesNotExistError{
Path: mountpoint,
}
select {
case errCh <- err:
return true
default:
// not the first error; fall back to logging it
return false
}
}
return false
}
}
// isBoringFusermountError returns whether the Wait error is
// uninteresting; exit status 1 is.
func isBoringFusermountError(err error) bool {
if err, ok := err.(*exec.ExitError); ok && err.Exited() {
if status, ok := err.Sys().(syscall.WaitStatus); ok && status.ExitStatus() == 1 {
return true
}
}
return false
}
func mount(dir string, conf *mountConfig, ready chan<- struct{}, errp *error) (fusefd *os.File, err error) {
// linux mount is never delayed
close(ready)
fds, err := syscall.Socketpair(syscall.AF_FILE, syscall.SOCK_STREAM, 0)
if err != nil {
return nil, fmt.Errorf("socketpair error: %v", err)
}
writeFile := os.NewFile(uintptr(fds[0]), "fusermount-child-writes")
defer writeFile.Close()
readFile := os.NewFile(uintptr(fds[1]), "fusermount-parent-reads")
defer readFile.Close()
cmd := exec.Command(
"fusermount",
"-o", conf.getOptions(),
"--",
dir,
)
cmd.Env = append(os.Environ(), "_FUSE_COMMFD=3")
cmd.ExtraFiles = []*os.File{writeFile}
var wg sync.WaitGroup
stdout, err := cmd.StdoutPipe()
if err != nil {
return nil, fmt.Errorf("setting up fusermount stderr: %v", err)
}
stderr, err := cmd.StderrPipe()
if err != nil {
return nil, fmt.Errorf("setting up fusermount stderr: %v", err)
}
if err := cmd.Start(); err != nil {
return nil, fmt.Errorf("fusermount: %v", err)
}
helperErrCh := make(chan error, 1)
wg.Add(2)
go lineLogger(&wg, "mount helper output", neverIgnoreLine, stdout)
go lineLogger(&wg, "mount helper error", handleFusermountStderr(helperErrCh), stderr)
wg.Wait()
if err := cmd.Wait(); err != nil {
// see if we have a better error to report
select {
case helperErr := <-helperErrCh:
// log the Wait error if it's not what we expected
if !isBoringFusermountError(err) {
log.Printf("mount helper failed: %v", err)
}
// and now return what we grabbed from stderr as the real
// error
return nil, helperErr
default:
// nope, fall back to generic message
}
return nil, fmt.Errorf("fusermount: %v", err)
}
c, err := net.FileConn(readFile)
if err != nil {
return nil, fmt.Errorf("FileConn from fusermount socket: %v", err)
}
defer c.Close()
uc, ok := c.(*net.UnixConn)
if !ok {
return nil, fmt.Errorf("unexpected FileConn type; expected UnixConn, got %T", c)
}
buf := make([]byte, 32) // expect 1 byte
oob := make([]byte, 32) // expect 24 bytes
_, oobn, _, _, err := uc.ReadMsgUnix(buf, oob)
scms, err := syscall.ParseSocketControlMessage(oob[:oobn])
if err != nil {
return nil, fmt.Errorf("ParseSocketControlMessage: %v", err)
}
if len(scms) != 1 {
return nil, fmt.Errorf("expected 1 SocketControlMessage; got scms = %#v", scms)
}
scm := scms[0]
gotFds, err := syscall.ParseUnixRights(&scm)
if err != nil {
return nil, fmt.Errorf("syscall.ParseUnixRights: %v", err)
}
if len(gotFds) != 1 {
return nil, fmt.Errorf("wanted 1 fd; got %#v", gotFds)
}
f := os.NewFile(uintptr(gotFds[0]), "/dev/fuse")
return f, nil
}

310
vendor/bazil.org/fuse/options.go generated vendored Normal file
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@ -0,0 +1,310 @@
package fuse
import (
"errors"
"strings"
)
func dummyOption(conf *mountConfig) error {
return nil
}
// mountConfig holds the configuration for a mount operation.
// Use it by passing MountOption values to Mount.
type mountConfig struct {
options map[string]string
maxReadahead uint32
initFlags InitFlags
osxfuseLocations []OSXFUSEPaths
}
func escapeComma(s string) string {
s = strings.Replace(s, `\`, `\\`, -1)
s = strings.Replace(s, `,`, `\,`, -1)
return s
}
// getOptions makes a string of options suitable for passing to FUSE
// mount flag `-o`. Returns an empty string if no options were set.
// Any platform specific adjustments should happen before the call.
func (m *mountConfig) getOptions() string {
var opts []string
for k, v := range m.options {
k = escapeComma(k)
if v != "" {
k += "=" + escapeComma(v)
}
opts = append(opts, k)
}
return strings.Join(opts, ",")
}
type mountOption func(*mountConfig) error
// MountOption is passed to Mount to change the behavior of the mount.
type MountOption mountOption
// FSName sets the file system name (also called source) that is
// visible in the list of mounted file systems.
//
// FreeBSD ignores this option.
func FSName(name string) MountOption {
return func(conf *mountConfig) error {
conf.options["fsname"] = name
return nil
}
}
// Subtype sets the subtype of the mount. The main type is always
// `fuse`. The type in a list of mounted file systems will look like
// `fuse.foo`.
//
// OS X ignores this option.
// FreeBSD ignores this option.
func Subtype(fstype string) MountOption {
return func(conf *mountConfig) error {
conf.options["subtype"] = fstype
return nil
}
}
// LocalVolume sets the volume to be local (instead of network),
// changing the behavior of Finder, Spotlight, and such.
//
// OS X only. Others ignore this option.
func LocalVolume() MountOption {
return localVolume
}
// VolumeName sets the volume name shown in Finder.
//
// OS X only. Others ignore this option.
func VolumeName(name string) MountOption {
return volumeName(name)
}
// NoAppleDouble makes OSXFUSE disallow files with names used by OS X
// to store extended attributes on file systems that do not support
// them natively.
//
// Such file names are:
//
// ._*
// .DS_Store
//
// OS X only. Others ignore this option.
func NoAppleDouble() MountOption {
return noAppleDouble
}
// NoAppleXattr makes OSXFUSE disallow extended attributes with the
// prefix "com.apple.". This disables persistent Finder state and
// other such information.
//
// OS X only. Others ignore this option.
func NoAppleXattr() MountOption {
return noAppleXattr
}
// ExclCreate causes O_EXCL flag to be set for only "truly" exclusive creates,
// i.e. create calls for which the initiator explicitly set the O_EXCL flag.
//
// OSXFUSE expects all create calls to return EEXIST in case the file
// already exists, regardless of whether O_EXCL was specified or not.
// To ensure this behavior, it normally sets OpenExclusive for all
// Create calls, regardless of whether the original call had it set.
// For distributed filesystems, that may force every file create to be
// a distributed consensus action, causing undesirable delays.
//
// This option makes the FUSE filesystem see the original flag value,
// and better decide when to ensure global consensus.
//
// Note that returning EEXIST on existing file create is still
// expected with OSXFUSE, regardless of the presence of the
// OpenExclusive flag.
//
// For more information, see
// https://github.com/osxfuse/osxfuse/issues/209
//
// OS X only. Others ignore this options.
// Requires OSXFUSE 3.4.1 or newer.
func ExclCreate() MountOption {
return exclCreate
}
// DaemonTimeout sets the time in seconds between a request and a reply before
// the FUSE mount is declared dead.
//
// OS X and FreeBSD only. Others ignore this option.
func DaemonTimeout(name string) MountOption {
return daemonTimeout(name)
}
var ErrCannotCombineAllowOtherAndAllowRoot = errors.New("cannot combine AllowOther and AllowRoot")
// AllowOther allows other users to access the file system.
//
// Only one of AllowOther or AllowRoot can be used.
func AllowOther() MountOption {
return func(conf *mountConfig) error {
if _, ok := conf.options["allow_root"]; ok {
return ErrCannotCombineAllowOtherAndAllowRoot
}
conf.options["allow_other"] = ""
return nil
}
}
// AllowRoot allows other users to access the file system.
//
// Only one of AllowOther or AllowRoot can be used.
//
// FreeBSD ignores this option.
func AllowRoot() MountOption {
return func(conf *mountConfig) error {
if _, ok := conf.options["allow_other"]; ok {
return ErrCannotCombineAllowOtherAndAllowRoot
}
conf.options["allow_root"] = ""
return nil
}
}
// AllowDev enables interpreting character or block special devices on the
// filesystem.
func AllowDev() MountOption {
return func(conf *mountConfig) error {
conf.options["dev"] = ""
return nil
}
}
// AllowSUID allows set-user-identifier or set-group-identifier bits to take
// effect.
func AllowSUID() MountOption {
return func(conf *mountConfig) error {
conf.options["suid"] = ""
return nil
}
}
// DefaultPermissions makes the kernel enforce access control based on
// the file mode (as in chmod).
//
// Without this option, the Node itself decides what is and is not
// allowed. This is normally ok because FUSE file systems cannot be
// accessed by other users without AllowOther/AllowRoot.
//
// FreeBSD ignores this option.
func DefaultPermissions() MountOption {
return func(conf *mountConfig) error {
conf.options["default_permissions"] = ""
return nil
}
}
// ReadOnly makes the mount read-only.
func ReadOnly() MountOption {
return func(conf *mountConfig) error {
conf.options["ro"] = ""
return nil
}
}
// MaxReadahead sets the number of bytes that can be prefetched for
// sequential reads. The kernel can enforce a maximum value lower than
// this.
//
// This setting makes the kernel perform speculative reads that do not
// originate from any client process. This usually tremendously
// improves read performance.
func MaxReadahead(n uint32) MountOption {
return func(conf *mountConfig) error {
conf.maxReadahead = n
return nil
}
}
// AsyncRead enables multiple outstanding read requests for the same
// handle. Without this, there is at most one request in flight at a
// time.
func AsyncRead() MountOption {
return func(conf *mountConfig) error {
conf.initFlags |= InitAsyncRead
return nil
}
}
// WritebackCache enables the kernel to buffer writes before sending
// them to the FUSE server. Without this, writethrough caching is
// used.
func WritebackCache() MountOption {
return func(conf *mountConfig) error {
conf.initFlags |= InitWritebackCache
return nil
}
}
// OSXFUSEPaths describes the paths used by an installed OSXFUSE
// version. See OSXFUSELocationV3 for typical values.
type OSXFUSEPaths struct {
// Prefix for the device file. At mount time, an incrementing
// number is suffixed until a free FUSE device is found.
DevicePrefix string
// Path of the load helper, used to load the kernel extension if
// no device files are found.
Load string
// Path of the mount helper, used for the actual mount operation.
Mount string
// Environment variable used to pass the path to the executable
// calling the mount helper.
DaemonVar string
}
// Default paths for OSXFUSE. See OSXFUSELocations.
var (
OSXFUSELocationV3 = OSXFUSEPaths{
DevicePrefix: "/dev/osxfuse",
Load: "/Library/Filesystems/osxfuse.fs/Contents/Resources/load_osxfuse",
Mount: "/Library/Filesystems/osxfuse.fs/Contents/Resources/mount_osxfuse",
DaemonVar: "MOUNT_OSXFUSE_DAEMON_PATH",
}
OSXFUSELocationV2 = OSXFUSEPaths{
DevicePrefix: "/dev/osxfuse",
Load: "/Library/Filesystems/osxfusefs.fs/Support/load_osxfusefs",
Mount: "/Library/Filesystems/osxfusefs.fs/Support/mount_osxfusefs",
DaemonVar: "MOUNT_FUSEFS_DAEMON_PATH",
}
)
// OSXFUSELocations sets where to look for OSXFUSE files. The
// arguments are all the possible locations. The previous locations
// are replaced.
//
// Without this option, OSXFUSELocationV3 and OSXFUSELocationV2 are
// used.
//
// OS X only. Others ignore this option.
func OSXFUSELocations(paths ...OSXFUSEPaths) MountOption {
return func(conf *mountConfig) error {
if len(paths) == 0 {
return errors.New("must specify at least one location for OSXFUSELocations")
}
// replace previous values, but make a copy so there's no
// worries about caller mutating their slice
conf.osxfuseLocations = append(conf.osxfuseLocations[:0], paths...)
return nil
}
}
// AllowNonEmptyMount allows the mounting over a non-empty directory.
//
// The files in it will be shadowed by the freshly created mount. By
// default these mounts are rejected to prevent accidental covering up
// of data, which could for example prevent automatic backup.
func AllowNonEmptyMount() MountOption {
return func(conf *mountConfig) error {
conf.options["nonempty"] = ""
return nil
}
}

35
vendor/bazil.org/fuse/options_darwin.go generated vendored Normal file
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@ -0,0 +1,35 @@
package fuse
func localVolume(conf *mountConfig) error {
conf.options["local"] = ""
return nil
}
func volumeName(name string) MountOption {
return func(conf *mountConfig) error {
conf.options["volname"] = name
return nil
}
}
func daemonTimeout(name string) MountOption {
return func(conf *mountConfig) error {
conf.options["daemon_timeout"] = name
return nil
}
}
func noAppleXattr(conf *mountConfig) error {
conf.options["noapplexattr"] = ""
return nil
}
func noAppleDouble(conf *mountConfig) error {
conf.options["noappledouble"] = ""
return nil
}
func exclCreate(conf *mountConfig) error {
conf.options["excl_create"] = ""
return nil
}

28
vendor/bazil.org/fuse/options_freebsd.go generated vendored Normal file
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@ -0,0 +1,28 @@
package fuse
func localVolume(conf *mountConfig) error {
return nil
}
func volumeName(name string) MountOption {
return dummyOption
}
func daemonTimeout(name string) MountOption {
return func(conf *mountConfig) error {
conf.options["timeout"] = name
return nil
}
}
func noAppleXattr(conf *mountConfig) error {
return nil
}
func noAppleDouble(conf *mountConfig) error {
return nil
}
func exclCreate(conf *mountConfig) error {
return nil
}

25
vendor/bazil.org/fuse/options_linux.go generated vendored Normal file
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@ -0,0 +1,25 @@
package fuse
func localVolume(conf *mountConfig) error {
return nil
}
func volumeName(name string) MountOption {
return dummyOption
}
func daemonTimeout(name string) MountOption {
return dummyOption
}
func noAppleXattr(conf *mountConfig) error {
return nil
}
func noAppleDouble(conf *mountConfig) error {
return nil
}
func exclCreate(conf *mountConfig) error {
return nil
}

75
vendor/bazil.org/fuse/protocol.go generated vendored Normal file
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@ -0,0 +1,75 @@
package fuse
import (
"fmt"
)
// Protocol is a FUSE protocol version number.
type Protocol struct {
Major uint32
Minor uint32
}
func (p Protocol) String() string {
return fmt.Sprintf("%d.%d", p.Major, p.Minor)
}
// LT returns whether a is less than b.
func (a Protocol) LT(b Protocol) bool {
return a.Major < b.Major ||
(a.Major == b.Major && a.Minor < b.Minor)
}
// GE returns whether a is greater than or equal to b.
func (a Protocol) GE(b Protocol) bool {
return a.Major > b.Major ||
(a.Major == b.Major && a.Minor >= b.Minor)
}
func (a Protocol) is79() bool {
return a.GE(Protocol{7, 9})
}
// HasAttrBlockSize returns whether Attr.BlockSize is respected by the
// kernel.
func (a Protocol) HasAttrBlockSize() bool {
return a.is79()
}
// HasReadWriteFlags returns whether ReadRequest/WriteRequest
// fields Flags and FileFlags are valid.
func (a Protocol) HasReadWriteFlags() bool {
return a.is79()
}
// HasGetattrFlags returns whether GetattrRequest field Flags is
// valid.
func (a Protocol) HasGetattrFlags() bool {
return a.is79()
}
func (a Protocol) is710() bool {
return a.GE(Protocol{7, 10})
}
// HasOpenNonSeekable returns whether OpenResponse field Flags flag
// OpenNonSeekable is supported.
func (a Protocol) HasOpenNonSeekable() bool {
return a.is710()
}
func (a Protocol) is712() bool {
return a.GE(Protocol{7, 12})
}
// HasUmask returns whether CreateRequest/MkdirRequest/MknodRequest
// field Umask is valid.
func (a Protocol) HasUmask() bool {
return a.is712()
}
// HasInvalidate returns whether InvalidateNode/InvalidateEntry are
// supported.
func (a Protocol) HasInvalidate() bool {
return a.is712()
}

6
vendor/bazil.org/fuse/unmount.go generated vendored Normal file
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@ -0,0 +1,6 @@
package fuse
// Unmount tries to unmount the filesystem mounted at dir.
func Unmount(dir string) error {
return unmount(dir)
}

21
vendor/bazil.org/fuse/unmount_linux.go generated vendored Normal file
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@ -0,0 +1,21 @@
package fuse
import (
"bytes"
"errors"
"os/exec"
)
func unmount(dir string) error {
cmd := exec.Command("fusermount", "-u", dir)
output, err := cmd.CombinedOutput()
if err != nil {
if len(output) > 0 {
output = bytes.TrimRight(output, "\n")
msg := err.Error() + ": " + string(output)
err = errors.New(msg)
}
return err
}
return nil
}

17
vendor/bazil.org/fuse/unmount_std.go generated vendored Normal file
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@ -0,0 +1,17 @@
// +build !linux
package fuse
import (
"os"
"syscall"
)
func unmount(dir string) error {
err := syscall.Unmount(dir, 0)
if err != nil {
err = &os.PathError{Op: "unmount", Path: dir, Err: err}
return err
}
return nil
}

18
vendor/vendor.json vendored
View File

@ -2,6 +2,24 @@
"comment": "", "comment": "",
"ignore": "test", "ignore": "test",
"package": [ "package": [
{
"checksumSHA1": "b5bkSc2hlmUV7PlLY6JlLwiJpiE=",
"path": "bazil.org/fuse",
"revision": "371fbbdaa8987b715bdd21d6adc4c9b20155f748",
"revisionTime": "2016-08-11T21:22:31Z"
},
{
"checksumSHA1": "389JFJTJADMtZkTIfdSnsmHVOUs=",
"path": "bazil.org/fuse/fs",
"revision": "371fbbdaa8987b715bdd21d6adc4c9b20155f748",
"revisionTime": "2016-08-11T21:22:31Z"
},
{
"checksumSHA1": "NPgkh9UWMsaTtsAAs3kPrclHT9Y=",
"path": "bazil.org/fuse/fuseutil",
"revision": "371fbbdaa8987b715bdd21d6adc4c9b20155f748",
"revisionTime": "2016-08-11T21:22:31Z"
},
{ {
"checksumSHA1": "M30X+Wqn7AnUr1numUOkQRI7ET0=", "checksumSHA1": "M30X+Wqn7AnUr1numUOkQRI7ET0=",
"path": "github.com/Azure/azure-sdk-for-go/storage", "path": "github.com/Azure/azure-sdk-for-go/storage",