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swarm/api: improve FUSE build constraints, logging and APIs (#3818) 

* swarm/api: fix build/tests on unsupported platforms

Skip FUSE tests if FUSE is unavailable and change build constraints so
the 'lesser' platforms aren't mentioned explicitly. The test are
compiled on all platforms to prevent regressions in _fallback.go

Also gofmt -w -s because why not.

* internal/web3ext: fix swarmfs wrappers

Remove inputFormatter specifications so users get an error
when passing the wrong number of arguments.

* swarm/api: improve FUSE-related logging and APIs

The API now returns JSON objects instead of strings.
Log messages for invalid arguments are removed.
This commit is contained in:
Felix Lange 2017-03-31 12:11:01 +02:00 committed by GitHub
parent c4a0efafd7
commit 105b37f1b4
6 changed files with 127 additions and 171 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
internal/web3ext/web3ext.go
View File

@ -29,10 +29,8 @@ var Modules = map[string]string{
"shh": Shh_JS,
"swarmfs": SWARMFS_JS,
"txpool": TxPool_JS,
}
const Chequebook_JS = `
web3._extend({
property: 'chequebook',
@ -497,20 +495,17 @@ web3._extend({
new web3._extend.Method({
name: 'mount',
call: 'swarmfs_mount',
params: 2,
inputFormatter: [null,null]
params: 2
}),
new web3._extend.Method({
name: 'unmount',
call: 'swarmfs_unmount',
params: 1,
inputFormatter: [null]
params: 1
}),
new web3._extend.Method({
name: 'listmounts',
call: 'swarmfs_listmounts',
params: 0,
inputFormatter: []
params: 0
})
]
});

12
swarm/api/fuse.go
View File

@ -14,7 +14,9 @@
// 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
// +build linux darwin freebsd
// Data structures used for Fuse filesystem, serving directories and serving files to Fuse driver.
package api
@ -29,10 +31,6 @@ import (
"golang.org/x/net/context"
)
// Data structures used for Fuse filesystem, serving directories and serving files to Fuse driver
type FS struct {
root *Dir
}
@ -55,7 +53,6 @@ type File struct {
reader storage.LazySectionReader
}
// Functions which satisfy the Fuse File System requests
func (filesystem *FS) Root() (fs.Node, error) {
return filesystem.root, nil
@ -104,14 +101,12 @@ func (d *Dir) ReadDirAll(ctx context.Context) ([]fuse.Dirent, error) {
}
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)
@ -135,5 +130,4 @@ func (file *File) Read(ctx context.Context, req *fuse.ReadRequest, resp *fuse.Re
}
resp.Data = buf[:n]
return err
}

7
swarm/api/swarmfs.go
View File

@ -17,8 +17,8 @@
package api
import (
"time"
"sync"
"time"
)
const (
@ -27,15 +27,12 @@ const (
maxFuseMounts = 5
)
type SwarmFS struct {
swarmApi *Api
activeMounts map[string]*MountInfo
activeLock *sync.RWMutex
}
func NewSwarmFS(api *Api) *SwarmFS {
swarmfs := &SwarmFS{
swarmApi: api,
@ -44,5 +41,3 @@ func NewSwarmFS(api *Api) *SwarmFS {
}
return swarmfs
}

30
swarm/api/swarmfs_windows.go → swarm/api/swarmfs_fallback.go
View File

@ -14,35 +14,37 @@
// 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
// +build !linux,!darwin,!freebsd
package api
import (
"github.com/ethereum/go-ethereum/log"
"errors"
)
// Dummy struct and functions to satsfy windows build
var errNoFUSE = errors.New("FUSE is not supported on this platform")
func isFUSEUnsupportedError(err error) bool {
return err == errNoFUSE
}
type MountInfo struct {
MountPoint string
ManifestHash string
}
func (self *SwarmFS) Mount(mhash, mountpoint string) error {
log.Info("Platform not supported")
return nil
func (self *SwarmFS) Mount(mhash, mountpoint string) (*MountInfo, error) {
return nil, errNoFUSE
}
func (self *SwarmFS) Unmount(mountpoint string) error {
log.Info("Platform not supported")
return nil
func (self *SwarmFS) Unmount(mountpoint string) (bool, error) {
return false, errNoFUSE
}
func (self *SwarmFS) Listmounts() (string, error) {
log.Info("Platform not supported")
return "",nil
func (self *SwarmFS) Listmounts() ([]*MountInfo, error) {
return nil, errNoFUSE
}
func (self *SwarmFS) Stop() error {
log.Info("Platform not supported")
return nil
}

23
swarm/api/swarmfs_unix_test.go → swarm/api/swarmfs_test.go
View File

@ -14,8 +14,6 @@
// 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 (
@ -35,7 +33,6 @@ func testFuseFileSystem(t *testing.T, f func(*FileSystem)) {
}
func createTestFiles(t *testing.T, files []string) {
os.RemoveAll(testUploadDir)
os.RemoveAll(testMountDir)
defer os.MkdirAll(testMountDir, 0777)
@ -58,9 +55,7 @@ func createTestFiles(t *testing.T, files []string) {
}
func compareFiles(t *testing.T, files []string) {
for f := range files {
sourceFile := filepath.Join(testUploadDir, files[f])
destinationFile := filepath.Join(testMountDir, files[f])
@ -81,12 +76,10 @@ func compareFiles(t *testing.T, files []string) {
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 {
@ -94,29 +87,29 @@ func doHashTest(fs *FileSystem, t *testing.T, ensName string, files ...string) {
}
swarmfs := NewSwarmFS(fs.api)
_ ,err1 := swarmfs.Mount(bzzhash, testMountDir)
if err1 != nil {
defer swarmfs.Stop()
_, err = swarmfs.Mount(bzzhash, testMountDir)
if isFUSEUnsupportedError(err) {
t.Skip("FUSE not supported:", err)
} else if err != nil {
t.Fatalf("Error mounting hash %v: %v", bzzhash, err)
}
compareFiles(t, files)
_, err2 := swarmfs.Unmount(testMountDir)
if err2 != nil {
if _, err := swarmfs.Unmount(testMountDir); err != 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")
})
}

165
swarm/api/swarmfs_unix.go
View File

@ -14,77 +14,86 @@
// 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
// +build linux darwin freebsd
package api
import (
"path/filepath"
"errors"
"fmt"
"os"
"path/filepath"
"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"
)
"time"
"bazil.org/fuse"
"bazil.org/fuse/fs"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/swarm/storage"
)
var (
inode uint64 = 1
inodeLock sync.RWMutex
)
// information about every active mount
var (
errEmptyMountPoint = errors.New("need non-empty mount point")
errMaxMountCount = errors.New("max FUSE mount count reached")
errMountTimeout = errors.New("mount timeout")
)
func isFUSEUnsupportedError(err error) bool {
if perr, ok := err.(*os.PathError); ok {
return perr.Op == "open" && perr.Path == "/dev/fuse"
}
return err == fuse.ErrOSXFUSENotFound
}
// MountInfo contains information about every active mount
type MountInfo struct {
mountPoint string
manifestHash string
MountPoint string
ManifestHash string
resolvedKey storage.Key
rootDir *Dir
fuseConnection *fuse.Conn
}
// newInode creates a new inode number.
// Inode numbers need to be unique, they are used for caching inside fuse
func NewInode() uint64 {
func newInode() uint64 {
inodeLock.Lock()
defer inodeLock.Unlock()
inode += 1
return inode
}
func (self *SwarmFS) Mount(mhash, mountpoint string) (string, error) {
func (self *SwarmFS) Mount(mhash, mountpoint string) (*MountInfo, error) {
if mountpoint == "" {
return nil, errEmptyMountPoint
}
cleanedMountPoint, err := filepath.Abs(filepath.Clean(mountpoint))
if err != nil {
return nil, err
}
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
return nil, errMaxMountCount
}
if _, ok := self.activeMounts[cleanedMountPoint]; ok {
err := fmt.Errorf("Mountpoint %s already mounted.", cleanedMountPoint)
log.Warn(err.Error())
return err.Error(), err
return nil, fmt.Errorf("%s is already mounted", cleanedMountPoint)
}
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
return nil, fmt.Errorf("can't resolve %q: %v", mhash, err)
}
if len(path) > 0 {
@ -94,15 +103,13 @@ func (self *SwarmFS) Mount(mhash, mountpoint string) (string, error) {
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
return nil, fmt.Errorf("can't load manifest %v: %v", key.String(), err)
}
dirTree := map[string]*Dir{}
rootDir := &Dir{
inode: NewInode(),
inode: newInode(),
name: "root",
directories: nil,
files: nil,
@ -110,7 +117,6 @@ func (self *SwarmFS) Mount(mhash, mountpoint string) (string, error) {
dirTree["root"] = rootDir
err = trie.listWithPrefix(path, quitC, func(entry *manifestTrieEntry, suffix string) {
key = common.Hex2Bytes(entry.Hash)
fullpath := "/" + suffix
basepath := filepath.Dir(fullpath)
@ -126,7 +132,7 @@ func (self *SwarmFS) Mount(mhash, mountpoint string) (string, error) {
if _, ok := dirTree[dirUntilNow]; !ok {
dirTree[dirUntilNow] = &Dir{
inode: NewInode(),
inode: newInode(),
name: thisDir,
path: dirUntilNow,
directories: nil,
@ -142,7 +148,7 @@ func (self *SwarmFS) Mount(mhash, mountpoint string) (string, error) {
}
}
thisFile := &File{
inode: NewInode(),
inode: newInode(),
name: filename,
path: fullpath,
key: key,
@ -154,113 +160,84 @@ func (self *SwarmFS) Mount(mhash, mountpoint string) (string, error) {
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
log.Warn("Error mounting swarm manifest", "mountpoint", cleanedMountPoint, "err", err)
return nil, 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))
mounterr <- 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
fuse.Unmount(cleanedMountPoint)
return nil, errMountTimeout
case err := <-mounterr:
errStr := fmt.Sprintf("Mounting %s encountered error: %v", cleanedMountPoint, err)
log.Warn(errStr)
return errStr, err
log.Warn("Error serving swarm FUSE FS", "mountpoint", cleanedMountPoint, "err", err)
return nil, err
case <-fconn.Ready:
log.Debug(fmt.Sprintf("Mounting connection succeeded for : %v", cleanedMountPoint))
log.Info("Now serving swarm FUSE FS", "manifest", mhash, "mountpoint", cleanedMountPoint)
}
// Assemble and Store the mount information for future use
mountInformation := &MountInfo{
mountPoint: cleanedMountPoint,
manifestHash: mhash,
mi := &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
self.activeMounts[cleanedMountPoint] = mi
return mi, nil
}
func (self *SwarmFS) Unmount(mountpoint string) (string, error) {
func (self *SwarmFS) Unmount(mountpoint string) (bool, error) {
self.activeLock.Lock()
defer self.activeLock.Unlock()
cleanedMountPoint, err := filepath.Abs(filepath.Clean(mountpoint))
if err != nil {
return err.Error(), err
return false, 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
if mountInfo == nil || mountInfo.MountPoint != cleanedMountPoint {
return false, fmt.Errorf("%s is not mounted", cleanedMountPoint)
}
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
// TODO(jmozah): try forceful unmount if normal unmount fails
return false, err
}
mountInfo.fuseConnection.Close()
// remove the mount information from the active map
mountInfo.fuseConnection.Close()
delete(self.activeMounts, cleanedMountPoint)
succString := fmt.Sprintf("UnMounting %v succeeded", cleanedMountPoint)
log.Info(succString)
return succString, nil
return true, nil
}
func (self *SwarmFS) Listmounts() (string, error) {
func (self *SwarmFS) Listmounts() []*MountInfo {
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))
rows := make([]*MountInfo, 0, len(self.activeMounts))
for _, mi := range self.activeMounts {
rows = append(rows, mi)
}
return strings.Join(rows, "\n"), nil
return rows
}
func (self *SwarmFS) Stop() bool {
for mp := range self.activeMounts {
mountInfo := self.activeMounts[mp]
self.Unmount(mountInfo.mountPoint)
self.Unmount(mountInfo.MountPoint)
}
return true
}