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10 Commits

Author SHA1 Message Date
Yannick Ulrich
c05d4fe951 4. Split converters 2023-03-01 15:15:32 +00:00
Yannick Ulrich
87c78566c1 3. Added builder 2023-03-01 15:14:06 +00:00
Yannick Ulrich
8dd8f3d012 2. added fuse.go in main 2023-03-01 15:13:49 +00:00
Yannick Ulrich
bf13b96660 1. moved fuse.go 2023-03-01 15:04:17 +00:00
Yannick Ulrich
2440cb954c Merged two properties lists 2023-02-26 19:11:30 +00:00
Yannick Ulrich
08c8d7e8de Removed device wrapper 2023-02-26 19:09:45 +00:00
Yannick Ulrich
1799c072ff Added one-shot converter for strings 2023-02-26 19:08:35 +00:00
Yannick Ulrich
c5ca30cd0a Added format converters 2023-02-26 19:08:10 +00:00
Yannick Ulrich
c046c67dbd Turned generator to return []byte 2023-02-26 19:07:09 +00:00
Yannick Ulrich
e2bd52b5a0 Implemented Read for watcher 2023-02-26 19:06:11 +00:00
3 changed files with 609 additions and 535 deletions

541
fuse.go
View File

@ -1,537 +1,18 @@
package main package main
import ( import (
"go.arsenm.dev/infinitime" "go.arsenm.dev/itd/internal/fusefs"
"go.arsenm.dev/infinitime/blefs"
"go.arsenm.dev/logger/log"
"os" "os"
"context"
"syscall"
"github.com/hanwen/go-fuse/v2/fs" "github.com/hanwen/go-fuse/v2/fs"
"github.com/hanwen/go-fuse/v2/fuse" "github.com/hanwen/go-fuse/v2/fuse"
"strconv" "go.arsenm.dev/logger/log"
"io" "context"
"bytes" "go.arsenm.dev/infinitime"
) )
type Device struct {
dev *infinitime.Device
}
func (i Device) HeartRateBytes() ([]byte, error) {
v, err := i.dev.HeartRate()
return []byte(strconv.Itoa(int(v)) + "\n"), err
}
func (i Device) BatteryLevelBytes() ([]byte, error) {
v, err := i.dev.BatteryLevel()
return []byte(strconv.Itoa(int(v)) + "\n"), err
}
func (i Device) StepCountBytes() ([]byte, error) {
v, err := i.dev.StepCount()
return []byte(strconv.Itoa(int(v)) + "\n"), err
}
func (i Device) MotionBytes() ([]byte, error) {
v, err := i.dev.Motion()
return []byte(strconv.Itoa(int(v.X)) + " " + strconv.Itoa(int(v.Y)) + " " + strconv.Itoa(int(v.Z)) + "\n"), err
}
func (i Device) AddressBytes() ([]byte, error) {
v := i.dev.Address()
return []byte(v + "\n"), nil
}
func (i Device) VersionBytes() ([]byte, error) {
v, err := i.dev.Version()
return []byte(v + "\n"), err
}
type ITProperty struct {
name string
Ino uint64
gen func(context.Context) (<-chan uint8, error)
}
type DirEntry struct {
isDir bool
modtime uint64
size uint32
path string
}
type ITNode struct {
fs.Inode
kind int
Ino uint64
lst []DirEntry
self DirEntry
path string
}
var properties = []ITProperty {
ITProperty{"heartrate", 2, nil},
ITProperty{"battery", 3, nil},
ITProperty{"motion", 4, nil},
ITProperty{"stepcount", 5, nil},
ITProperty{"version", 6, nil},
ITProperty{"address", 7, nil},
}
var myfs *blefs.FS = nil;
var inodemap map[string]uint64 = nil;
var _ = (fs.NodeReaddirer)((*ITNode)(nil))
// Readdir is part of the NodeReaddirer interface
func (n *ITNode) Readdir(ctx context.Context) (fs.DirStream, syscall.Errno) {
switch n.kind {
case 0:
// root folder
r := make([]fuse.DirEntry, 2)
r[0] = fuse.DirEntry{
Name: "device",
Ino: 0,
Mode: fuse.S_IFDIR,
}
r[1] = fuse.DirEntry{
Name: "fs",
Ino: 1,
Mode: fuse.S_IFDIR,
}
return fs.NewListDirStream(r), 0
case 1:
// device folder
r := make([]fuse.DirEntry, 6)
for ind, value := range properties {
r[ind] = fuse.DirEntry{
Name: value.name,
Ino: value.Ino,
Mode: fuse.S_IFREG,
}
}
return fs.NewListDirStream(r), 0
case 2:
// on device
files, _ := myfs.ReadDir(n.path)
log.Info("readdir").Str("path", n.path).Int("objects", len(files)).Send()
r := make([]fuse.DirEntry, len(files))
n.lst = make([]DirEntry, len(files))
for ind, entry := range files {
info, _ := entry.Info()
name := info.Name()
file := DirEntry{
path: n.path + "/" + name,
size: uint32(info.Size()),
modtime: uint64(info.ModTime().Unix()),
isDir: info.IsDir(),
}
n.lst[ind] = file
ino := inodemap[file.path]
if ino == 0 {
ino = uint64(len(inodemap)) + 1
inodemap[file.path] = ino
}
if file.isDir {
r[ind] = fuse.DirEntry{
Name: name,
Mode: fuse.S_IFDIR,
Ino : ino + 10,
}
} else {
r[ind] = fuse.DirEntry{
Name: name,
Mode: fuse.S_IFREG,
Ino : ino + 10,
}
}
}
return fs.NewListDirStream(r), 0
}
r := make([]fuse.DirEntry, 0)
return fs.NewListDirStream(r), 0
}
var _ = (fs.NodeLookuper)((*ITNode)(nil))
func (n *ITNode) Lookup(ctx context.Context, name string, out *fuse.EntryOut) (*fs.Inode, syscall.Errno) {
switch n.kind {
case 0:
// root folder
if name == "device" {
stable := fs.StableAttr{
Mode: fuse.S_IFDIR,
Ino: uint64(0),
}
operations := &ITNode{kind: 1, Ino: 0}
child := n.NewInode(ctx, operations, stable)
return child, 0
} else if name == "fs" {
stable := fs.StableAttr{
Mode: fuse.S_IFDIR,
Ino: uint64(1),
}
operations := &ITNode{kind: 2, Ino: 1, path : ""}
child := n.NewInode(ctx, operations, stable)
return child, 0
}
case 1:
// device folder
for _, value := range properties {
if value.name == name {
stable := fs.StableAttr{
Mode: fuse.S_IFREG,
Ino: uint64(value.Ino),
}
operations := &ITNode{kind: 3, Ino: value.Ino}
child := n.NewInode(ctx, operations, stable)
return child, 0
}
}
return nil, syscall.ENOENT
case 2:
// FS object
if len(n.lst) == 0 {
n.Readdir(ctx)
}
for _, file := range n.lst {
if file.path != n.path + "/" + name {
continue;
}
log.Info("LookUp successful").Str("path", file.path).Send()
if file.isDir {
stable := fs.StableAttr{
Mode: fuse.S_IFDIR,
Ino: inodemap[file.path],
}
operations := &ITNode{kind: 2, path: file.path}
child := n.NewInode(ctx, operations, stable)
return child, 0
} else {
stable := fs.StableAttr{
Mode: fuse.S_IFREG,
Ino: inodemap[file.path],
}
operations := &ITNode{
kind: 2, path: file.path,
self: file,
}
child := n.NewInode(ctx, operations, stable)
return child, 0
}
break;
}
log.Warn("LookUp failed").Str("path", n.path + "/" + name).Send()
}
return nil, syscall.ENOENT
}
type bytesFileReadHandle struct {
content []byte
}
var _ = (fs.FileReader)((*bytesFileReadHandle)(nil))
func (fh *bytesFileReadHandle) Read(ctx context.Context, dest []byte, off int64) (fuse.ReadResult, syscall.Errno) {
log.Info("Executing Read").Int("size", len(fh.content)).Send()
end := off + int64(len(dest))
if end > int64(len(fh.content)) {
end = int64(len(fh.content))
}
return fuse.ReadResultData(fh.content[off:end]), 0
}
type sensorFileReadHandle struct {
ch <-chan uint8
}
var _ = (fs.FileReader)((*sensorFileReadHandle)(nil))
func (fh *sensorFileReadHandle) Read(ctx context.Context, dest []byte, off int64) (fuse.ReadResult, syscall.Errno) {
v := <-fh.ch
content := []byte(strconv.Itoa(int(v)) + "\n")
return fuse.ReadResultData(content), 0
}
type bytesFileWriteHandle struct {
content []byte
path string
}
var _ = (fs.FileWriter)((*bytesFileWriteHandle)(nil))
func (fh *bytesFileWriteHandle) Write(ctx context.Context, data []byte, off int64) (written uint32, errno syscall.Errno) {
log.Info("Executing Write").Str("path", fh.path).Int("prev_size", len(fh.content)).Int("next_size", len(data)).Send()
if off != int64(len(fh.content)) {
}
fh.content = append(fh.content[:], data[:]...)
return uint32(len(data)), 0
}
var _ = (fs.FileFlusher)((*bytesFileWriteHandle)(nil))
func (fh *bytesFileWriteHandle) Flush(ctx context.Context) (errno syscall.Errno) {
if len(fh.content) == 0 {
return 0
}
log.Info("Attempting flush").Str("path", fh.path).Send()
fp, err := myfs.Create(fh.path, uint32(len(fh.content)))
if err != nil {
log.Error("Flush failed: create").Str("path", fh.path).Err(err).Send()
return syscall.EROFS
}
go func() {
// For every progress event
for sent := range fp.Progress() {
log.Info("Progress").Int("bytes", int(sent)).Int("of", len(fh.content)).Send();
}
}()
r := bytes.NewReader(fh.content)
nread, err := io.Copy(fp, r)
if err != nil {
log.Error("Flush failed: write").Str("path", fh.path).Err(err).Send()
fp.Close()
return syscall.EROFS
}
if int(nread) != len(fh.content) {
log.Error("Flush failed: write").Str("path", fh.path).Int("expect", len(fh.content)).Int("got", int(nread)).Send()
fp.Close()
return syscall.EROFS
}
err = fp.Close()
if err != nil {
log.Error("Flush failed: close").Str("path", fh.path).Err(err).Send()
return syscall.EROFS
}
log.Info("Flush done").Str("path", fh.path).Int("size", len(fh.content)).Send()
return 0
}
var _ = (fs.FileFsyncer)((*bytesFileWriteHandle)(nil))
func (fh *bytesFileWriteHandle) Fsync(ctx context.Context, flags uint32) (errno syscall.Errno) {
return fh.Flush(ctx)
}
var _ = (fs.NodeGetattrer)((*ITNode)(nil))
func (bn *ITNode) Getattr(ctx context.Context, f fs.FileHandle, out *fuse.AttrOut) syscall.Errno {
log.Info("getattr").Str("path", bn.path).Send();
out.Ino = bn.Ino
out.Mtime = bn.self.modtime
out.Ctime = bn.self.modtime
out.Atime = bn.self.modtime
out.Size = uint64(bn.self.size)
return 0
}
var _ = (fs.NodeSetattrer)((*ITNode)(nil))
func (bn *ITNode) Setattr(ctx context.Context, fh fs.FileHandle, in *fuse.SetAttrIn, out *fuse.AttrOut) syscall.Errno {
log.Info("setattr").Str("path", bn.path).Send()
out.Size = 0;
out.Mtime = 0;
return 0
}
var _ = (fs.NodeOpener)((*ITNode)(nil))
func (f *ITNode) Open(ctx context.Context, openFlags uint32) (fh fs.FileHandle, fuseFlags uint32, errno syscall.Errno) {
switch f.kind {
case 2:
// FS file
if openFlags&syscall.O_RDWR != 0 {
log.Warn("open: failed RDWR").Str("path", f.path).Send()
return nil, 0, syscall.EROFS
}
if openFlags & syscall.O_WRONLY != 0 {
log.Info("Opening file: write").Str("path", f.path).Send()
fh = &bytesFileWriteHandle{
path : f.path,
content : make([]byte, 0),
}
return fh, fuse.FOPEN_DIRECT_IO, 0
} else {
log.Info("Opening file: read").Str("path", f.path).Send();
fp, err := myfs.Open(f.path)
if err != nil {
log.Error("Opening file failed").Str("path", f.path).Err(err).Send();
return nil, 0, syscall.EROFS
}
defer fp.Close()
b := &bytes.Buffer{}
go func() {
// For every progress event
for sent := range fp.Progress() {
log.Info("Progress").Int("bytes", int(sent)).Int("of", int(f.self.size)).Send();
}
}()
_, err = io.Copy(b, fp)
if err != nil {
log.Error("Read failed").Str("path", f.path).Err(err).Send()
fp.Close()
return nil, 0, syscall.EROFS
}
fh = &bytesFileReadHandle{
content: b.Bytes(),
}
return fh, fuse.FOPEN_DIRECT_IO, 0
}
case 3:
// Device file
// disallow writes
if openFlags&(syscall.O_RDWR|syscall.O_WRONLY) != 0 {
return nil, 0, syscall.EROFS
}
for _, value := range properties {
if value.Ino == f.Ino {
ans, err := value.gen(ctx)
if err != nil {
return nil, 0, syscall.EROFS
}
fh = &sensorFileReadHandle{
ch: ans,
}
return fh, fuse.FOPEN_DIRECT_IO, 0
}
}
}
return nil, 0, syscall.EROFS
}
var _ = (fs.NodeCreater)((*ITNode)(nil))
func (f *ITNode) Create(ctx context.Context, name string, flags uint32, mode uint32, out *fuse.EntryOut) (node *fs.Inode, fh fs.FileHandle, fuseFlags uint32, errno syscall.Errno) {
if f.kind != 2 {
return nil, nil, 0, syscall.EROFS
}
path := f.path + "/" + name
ino := uint64(len(inodemap)) + 11
inodemap[path] = ino
stable := fs.StableAttr{
Mode: fuse.S_IFREG,
Ino: ino,
}
operations := &ITNode{
kind: 2, Ino: ino,
path : path,
}
node = f.NewInode(ctx, operations, stable)
fh = &bytesFileWriteHandle{
path : path,
content : make([]byte, 0),
}
log.Info("Creating file").Str("path", path).Send()
errno = 0
return node, fh, fuseFlags, 0
}
var _ = (fs.NodeMkdirer)((*ITNode)(nil))
func (f *ITNode) Mkdir(ctx context.Context, name string, mode uint32, out *fuse.EntryOut) (*fs.Inode, syscall.Errno) {
if f.kind != 2 {
return nil, syscall.EROFS
}
path := f.path + "/" + name
err := myfs.Mkdir(path)
if err != nil {
log.Info("Mkdir failed").
Str("path", path).
Err(err).
Send()
return nil, syscall.EROFS
}
ino := uint64(len(inodemap)) + 11
inodemap[path] = ino
stable := fs.StableAttr{
Mode: fuse.S_IFDIR,
Ino: ino,
}
operations := &ITNode{
kind: 2, Ino: ino,
path : path,
}
node := f.NewInode(ctx, operations, stable)
log.Info("Mkdir sucess").
Str("path", path).
Int("ino", int(ino)).
Send()
return node, 0
}
var _ = (fs.NodeRenamer)((*ITNode)(nil))
func (f *ITNode) Rename(ctx context.Context, name string, newParent fs.InodeEmbedder, newName string, flags uint32) syscall.Errno {
p1 := f.path + "/" + name
p2 := newParent.EmbeddedInode().Path(nil)[2:] + "/" + newName
err := myfs.Rename(p1, p2)
if err != nil {
log.Error("Rename failed").
Str("src", p1).
Str("dest", p2).
Err(err).
Send()
return syscall.EROFS
}
log.Info("Rename sucess").
Str("src", p1).
Str("dest", p2).
Send()
ino := inodemap[p1]
delete(inodemap, p1)
inodemap[p2] = ino
return 0
}
var _ = (fs.NodeUnlinker)((*ITNode)(nil))
func (f *ITNode) Unlink(ctx context.Context, name string) syscall.Errno {
delete(inodemap, f.path + "/" + name)
err := myfs.Remove(f.path + "/" + name)
if err != nil {
log.Error("Unlink failed").
Str("file", f.path + "/" + name).
Err(err).
Send()
return syscall.EROFS
}
log.Info("Unlink success").
Str("file", f.path + "/" + name).
Send()
return 0
}
var _ = (fs.NodeRmdirer)((*ITNode)(nil))
func (f *ITNode) Rmdir(ctx context.Context, name string) syscall.Errno {
return f.Unlink(ctx, name)
}
func startFuse(ctx context.Context, dev *infinitime.Device) error { func startFuse(ctx context.Context, dev *infinitime.Device) error {
// This is where we'll mount the FS // This is where we'll mount the FS
os.Mkdir(k.String("fuse.mountpoint"), 0755) os.Mkdir(k.String("fuse.mountpoint"), 0755)
root := &ITNode{kind: 0} root := fusefs.BuildRootNode(dev)
server, err := fs.Mount(k.String("fuse.mountpoint"), root, &fs.Options{ server, err := fs.Mount(k.String("fuse.mountpoint"), root, &fs.Options{
MountOptions: fuse.MountOptions{ MountOptions: fuse.MountOptions{
// Set to true to see how the file system works. // Set to true to see how the file system works.
@ -551,22 +32,12 @@ func startFuse(ctx context.Context, dev *infinitime.Device) error {
Str("target", k.String("fuse.mountpoint")). Str("target", k.String("fuse.mountpoint")).
Send() Send()
mydev := Device{dev : dev}; fusefs.BuildProperties(dev)
properties[0].gen = mydev.dev.WatchHeartRate;
// properties[0].f = mydev.HeartRateBytes;
// properties[1].f = mydev.BatteryLevelBytes;
// properties[2].f = mydev.MotionBytes;
// properties[3].f = mydev.StepCountBytes;
// properties[4].f = mydev.VersionBytes;
// properties[5].f = mydev.AddressBytes;
myfs, err = dev.FS()
if err != nil { if err != nil {
log.Warn("Error getting BLE filesystem").Err(err).Send() log.Warn("Error getting BLE filesystem").Err(err).Send()
return err return err
} }
inodemap = make(map[string]uint64)
// Wait until unmount before exiting // Wait until unmount before exiting
go server.Serve() go server.Serve()

View File

@ -0,0 +1,61 @@
package fusefs
import (
"go.arsenm.dev/infinitime"
"context"
"strconv"
)
func converterU8(ctx context.Context, in <-chan uint8) <-chan []byte {
out := make(chan []byte, 2)
go func() {
for {
select {
case <- ctx.Done():
return
case event := <-in:
out <- []byte(strconv.Itoa(int(event)) + "\n")
}
}
}()
return out
}
func converterU32(ctx context.Context, in <-chan uint32) <-chan []byte {
out := make(chan []byte, 2)
go func() {
for {
select {
case <- ctx.Done():
return
case event := <-in:
out <- []byte(strconv.Itoa(int(event)) + "\n")
}
}
}()
return out
}
func converterMotionValues(ctx context.Context, in <-chan infinitime.MotionValues) <-chan []byte {
out := make(chan []byte, 2)
go func() {
for {
select {
case <- ctx.Done():
return
case event := <-in:
out <- []byte(strconv.Itoa(int(event.X)) + " " + strconv.Itoa(int(event.Y)) + " " + strconv.Itoa(int(event.Z)) + "\n")
}
}
}()
return out
}
func converter1String(ctx context.Context, in string) <-chan []byte {
out := make(chan []byte, 2)
out <- []byte(in + "\n")
close(out)
return out
}

542
internal/fusefs/fuse.go Normal file
View File

@ -0,0 +1,542 @@
package fusefs
import (
"go.arsenm.dev/infinitime"
"go.arsenm.dev/infinitime/blefs"
"go.arsenm.dev/logger/log"
"context"
"syscall"
"github.com/hanwen/go-fuse/v2/fs"
"github.com/hanwen/go-fuse/v2/fuse"
"io"
"bytes"
)
type ITProperty struct {
name string
Ino uint64
gen func(context.Context) (<-chan []byte, error)
}
type DirEntry struct {
isDir bool
modtime uint64
size uint32
path string
}
type ITNode struct {
fs.Inode
kind int
Ino uint64
lst []DirEntry
self DirEntry
path string
}
func BuildRootNode(dev *infinitime.Device) *ITNode {
inodemap = make(map[string]uint64)
myfs, _ = dev.FS()
return &ITNode{kind: 0}
}
var properties = make([]ITProperty, 6)
func BuildProperties(dev *infinitime.Device) {
properties[0] = ITProperty{"heartrate", 2,
func(ctx context.Context) (<-chan []byte, error) {
ans, err := dev.WatchHeartRate(ctx)
return converterU8(ctx, ans), err
}}
properties[1] = ITProperty{"battery", 3,
func(ctx context.Context) (<-chan []byte, error) {
ans, err := dev.WatchBatteryLevel(ctx)
return converterU8(ctx, ans), err
}}
properties[2] = ITProperty{"motion", 4,
func(ctx context.Context) (<-chan []byte, error) {
ans, err := dev.WatchMotion(ctx)
return converterMotionValues(ctx, ans), err
}}
properties[3] = ITProperty{"stepcount", 5,
func(ctx context.Context) (<-chan []byte, error) {
ans, err := dev.WatchStepCount(ctx)
return converterU32(ctx, ans), err
}}
properties[4] = ITProperty{"version", 6,
func(ctx context.Context) (<-chan []byte, error) {
ans, err := dev.Version()
return converter1String(ctx, ans), err
}}
properties[5] = ITProperty{"address", 7,
func(ctx context.Context) (<-chan []byte, error) {
ans := dev.Address()
return converter1String(ctx, ans), nil
}}
}
var myfs *blefs.FS = nil;
var inodemap map[string]uint64 = nil;
var _ = (fs.NodeReaddirer)((*ITNode)(nil))
// Readdir is part of the NodeReaddirer interface
func (n *ITNode) Readdir(ctx context.Context) (fs.DirStream, syscall.Errno) {
switch n.kind {
case 0:
// root folder
r := make([]fuse.DirEntry, 2)
r[0] = fuse.DirEntry{
Name: "device",
Ino: 0,
Mode: fuse.S_IFDIR,
}
r[1] = fuse.DirEntry{
Name: "fs",
Ino: 1,
Mode: fuse.S_IFDIR,
}
return fs.NewListDirStream(r), 0
case 1:
// device folder
r := make([]fuse.DirEntry, 6)
for ind, value := range properties {
r[ind] = fuse.DirEntry{
Name: value.name,
Ino: value.Ino,
Mode: fuse.S_IFREG,
}
}
return fs.NewListDirStream(r), 0
case 2:
// on device
files, _ := myfs.ReadDir(n.path)
log.Info("readdir").Str("path", n.path).Int("objects", len(files)).Send()
r := make([]fuse.DirEntry, len(files))
n.lst = make([]DirEntry, len(files))
for ind, entry := range files {
info, _ := entry.Info()
name := info.Name()
file := DirEntry{
path: n.path + "/" + name,
size: uint32(info.Size()),
modtime: uint64(info.ModTime().Unix()),
isDir: info.IsDir(),
}
n.lst[ind] = file
ino := inodemap[file.path]
if ino == 0 {
ino = uint64(len(inodemap)) + 1
inodemap[file.path] = ino
}
if file.isDir {
r[ind] = fuse.DirEntry{
Name: name,
Mode: fuse.S_IFDIR,
Ino : ino + 10,
}
} else {
r[ind] = fuse.DirEntry{
Name: name,
Mode: fuse.S_IFREG,
Ino : ino + 10,
}
}
}
return fs.NewListDirStream(r), 0
}
r := make([]fuse.DirEntry, 0)
return fs.NewListDirStream(r), 0
}
var _ = (fs.NodeLookuper)((*ITNode)(nil))
func (n *ITNode) Lookup(ctx context.Context, name string, out *fuse.EntryOut) (*fs.Inode, syscall.Errno) {
switch n.kind {
case 0:
// root folder
if name == "device" {
stable := fs.StableAttr{
Mode: fuse.S_IFDIR,
Ino: uint64(0),
}
operations := &ITNode{kind: 1, Ino: 0}
child := n.NewInode(ctx, operations, stable)
return child, 0
} else if name == "fs" {
stable := fs.StableAttr{
Mode: fuse.S_IFDIR,
Ino: uint64(1),
}
operations := &ITNode{kind: 2, Ino: 1, path : ""}
child := n.NewInode(ctx, operations, stable)
return child, 0
}
case 1:
// device folder
for _, value := range properties {
if value.name == name {
stable := fs.StableAttr{
Mode: fuse.S_IFREG,
Ino: uint64(value.Ino),
}
operations := &ITNode{kind: 3, Ino: value.Ino}
child := n.NewInode(ctx, operations, stable)
return child, 0
}
}
return nil, syscall.ENOENT
case 2:
// FS object
if len(n.lst) == 0 {
n.Readdir(ctx)
}
for _, file := range n.lst {
if file.path != n.path + "/" + name {
continue;
}
log.Info("LookUp successful").Str("path", file.path).Send()
if file.isDir {
stable := fs.StableAttr{
Mode: fuse.S_IFDIR,
Ino: inodemap[file.path],
}
operations := &ITNode{kind: 2, path: file.path}
child := n.NewInode(ctx, operations, stable)
return child, 0
} else {
stable := fs.StableAttr{
Mode: fuse.S_IFREG,
Ino: inodemap[file.path],
}
operations := &ITNode{
kind: 2, path: file.path,
self: file,
}
child := n.NewInode(ctx, operations, stable)
return child, 0
}
break;
}
log.Warn("LookUp failed").Str("path", n.path + "/" + name).Send()
}
return nil, syscall.ENOENT
}
type bytesFileReadHandle struct {
content []byte
}
var _ = (fs.FileReader)((*bytesFileReadHandle)(nil))
func (fh *bytesFileReadHandle) Read(ctx context.Context, dest []byte, off int64) (fuse.ReadResult, syscall.Errno) {
log.Info("Executing Read").Int("size", len(fh.content)).Send()
end := off + int64(len(dest))
if end > int64(len(fh.content)) {
end = int64(len(fh.content))
}
return fuse.ReadResultData(fh.content[off:end]), 0
}
type sensorFileReadHandle struct {
ch <-chan []byte
cancel context.CancelFunc
}
var _ = (fs.FileReader)((*sensorFileReadHandle)(nil))
func (fh *sensorFileReadHandle) Read(ctx context.Context, dest []byte, off int64) (fuse.ReadResult, syscall.Errno) {
content := <-fh.ch
return fuse.ReadResultData(content), 0
}
var _ = (fs.FileFlusher)((*sensorFileReadHandle)(nil))
func (fh *sensorFileReadHandle) Flush(ctx context.Context) (errno syscall.Errno) {
fh.cancel()
return 0
}
type bytesFileWriteHandle struct {
content []byte
path string
}
var _ = (fs.FileWriter)((*bytesFileWriteHandle)(nil))
func (fh *bytesFileWriteHandle) Write(ctx context.Context, data []byte, off int64) (written uint32, errno syscall.Errno) {
log.Info("Executing Write").Str("path", fh.path).Int("prev_size", len(fh.content)).Int("next_size", len(data)).Send()
if off != int64(len(fh.content)) {
}
fh.content = append(fh.content[:], data[:]...)
return uint32(len(data)), 0
}
var _ = (fs.FileFlusher)((*bytesFileWriteHandle)(nil))
func (fh *bytesFileWriteHandle) Flush(ctx context.Context) (errno syscall.Errno) {
if len(fh.content) == 0 {
return 0
}
log.Info("Attempting flush").Str("path", fh.path).Send()
fp, err := myfs.Create(fh.path, uint32(len(fh.content)))
if err != nil {
log.Error("Flush failed: create").Str("path", fh.path).Err(err).Send()
return syscall.EROFS
}
go func() {
// For every progress event
for sent := range fp.Progress() {
log.Info("Progress").Int("bytes", int(sent)).Int("of", len(fh.content)).Send();
}
}()
r := bytes.NewReader(fh.content)
nread, err := io.Copy(fp, r)
if err != nil {
log.Error("Flush failed: write").Str("path", fh.path).Err(err).Send()
fp.Close()
return syscall.EROFS
}
if int(nread) != len(fh.content) {
log.Error("Flush failed: write").Str("path", fh.path).Int("expect", len(fh.content)).Int("got", int(nread)).Send()
fp.Close()
return syscall.EROFS
}
err = fp.Close()
if err != nil {
log.Error("Flush failed: close").Str("path", fh.path).Err(err).Send()
return syscall.EROFS
}
log.Info("Flush done").Str("path", fh.path).Int("size", len(fh.content)).Send()
return 0
}
var _ = (fs.FileFsyncer)((*bytesFileWriteHandle)(nil))
func (fh *bytesFileWriteHandle) Fsync(ctx context.Context, flags uint32) (errno syscall.Errno) {
return fh.Flush(ctx)
}
var _ = (fs.NodeGetattrer)((*ITNode)(nil))
func (bn *ITNode) Getattr(ctx context.Context, f fs.FileHandle, out *fuse.AttrOut) syscall.Errno {
log.Info("getattr").Str("path", bn.path).Send();
out.Ino = bn.Ino
out.Mtime = bn.self.modtime
out.Ctime = bn.self.modtime
out.Atime = bn.self.modtime
out.Size = uint64(bn.self.size)
return 0
}
var _ = (fs.NodeSetattrer)((*ITNode)(nil))
func (bn *ITNode) Setattr(ctx context.Context, fh fs.FileHandle, in *fuse.SetAttrIn, out *fuse.AttrOut) syscall.Errno {
log.Info("setattr").Str("path", bn.path).Send()
out.Size = 0;
out.Mtime = 0;
return 0
}
var _ = (fs.NodeOpener)((*ITNode)(nil))
func (f *ITNode) Open(ctx context.Context, openFlags uint32) (fh fs.FileHandle, fuseFlags uint32, errno syscall.Errno) {
switch f.kind {
case 2:
// FS file
if openFlags&syscall.O_RDWR != 0 {
log.Warn("open: failed RDWR").Str("path", f.path).Send()
return nil, 0, syscall.EROFS
}
if openFlags & syscall.O_WRONLY != 0 {
log.Info("Opening file: write").Str("path", f.path).Send()
fh = &bytesFileWriteHandle{
path : f.path,
content : make([]byte, 0),
}
return fh, fuse.FOPEN_DIRECT_IO, 0
} else {
log.Info("Opening file: read").Str("path", f.path).Send();
fp, err := myfs.Open(f.path)
if err != nil {
log.Error("Opening file failed").Str("path", f.path).Err(err).Send();
return nil, 0, syscall.EROFS
}
defer fp.Close()
b := &bytes.Buffer{}
go func() {
// For every progress event
for sent := range fp.Progress() {
log.Info("Progress").Int("bytes", int(sent)).Int("of", int(f.self.size)).Send();
}
}()
_, err = io.Copy(b, fp)
if err != nil {
log.Error("Read failed").Str("path", f.path).Err(err).Send()
fp.Close()
return nil, 0, syscall.EROFS
}
fh = &bytesFileReadHandle{
content: b.Bytes(),
}
return fh, fuse.FOPEN_DIRECT_IO, 0
}
case 3:
// Device file
// disallow writes
if openFlags&(syscall.O_RDWR|syscall.O_WRONLY) != 0 {
return nil, 0, syscall.EROFS
}
for _, value := range properties {
if value.Ino == f.Ino {
sub_ctx, cancel := context.WithCancel(ctx)
ans, err := value.gen(sub_ctx)
if err != nil {
return nil, 0, syscall.EROFS
}
fh = &sensorFileReadHandle{
ch: ans,
cancel : cancel,
}
return fh, fuse.FOPEN_DIRECT_IO, 0
}
}
}
return nil, 0, syscall.EROFS
}
var _ = (fs.NodeCreater)((*ITNode)(nil))
func (f *ITNode) Create(ctx context.Context, name string, flags uint32, mode uint32, out *fuse.EntryOut) (node *fs.Inode, fh fs.FileHandle, fuseFlags uint32, errno syscall.Errno) {
if f.kind != 2 {
return nil, nil, 0, syscall.EROFS
}
path := f.path + "/" + name
ino := uint64(len(inodemap)) + 11
inodemap[path] = ino
stable := fs.StableAttr{
Mode: fuse.S_IFREG,
Ino: ino,
}
operations := &ITNode{
kind: 2, Ino: ino,
path : path,
}
node = f.NewInode(ctx, operations, stable)
fh = &bytesFileWriteHandle{
path : path,
content : make([]byte, 0),
}
log.Info("Creating file").Str("path", path).Send()
errno = 0
return node, fh, fuseFlags, 0
}
var _ = (fs.NodeMkdirer)((*ITNode)(nil))
func (f *ITNode) Mkdir(ctx context.Context, name string, mode uint32, out *fuse.EntryOut) (*fs.Inode, syscall.Errno) {
if f.kind != 2 {
return nil, syscall.EROFS
}
path := f.path + "/" + name
err := myfs.Mkdir(path)
if err != nil {
log.Info("Mkdir failed").
Str("path", path).
Err(err).
Send()
return nil, syscall.EROFS
}
ino := uint64(len(inodemap)) + 11
inodemap[path] = ino
stable := fs.StableAttr{
Mode: fuse.S_IFDIR,
Ino: ino,
}
operations := &ITNode{
kind: 2, Ino: ino,
path : path,
}
node := f.NewInode(ctx, operations, stable)
log.Info("Mkdir sucess").
Str("path", path).
Int("ino", int(ino)).
Send()
return node, 0
}
var _ = (fs.NodeRenamer)((*ITNode)(nil))
func (f *ITNode) Rename(ctx context.Context, name string, newParent fs.InodeEmbedder, newName string, flags uint32) syscall.Errno {
p1 := f.path + "/" + name
p2 := newParent.EmbeddedInode().Path(nil)[2:] + "/" + newName
err := myfs.Rename(p1, p2)
if err != nil {
log.Error("Rename failed").
Str("src", p1).
Str("dest", p2).
Err(err).
Send()
return syscall.EROFS
}
log.Info("Rename sucess").
Str("src", p1).
Str("dest", p2).
Send()
ino := inodemap[p1]
delete(inodemap, p1)
inodemap[p2] = ino
return 0
}
var _ = (fs.NodeUnlinker)((*ITNode)(nil))
func (f *ITNode) Unlink(ctx context.Context, name string) syscall.Errno {
delete(inodemap, f.path + "/" + name)
err := myfs.Remove(f.path + "/" + name)
if err != nil {
log.Error("Unlink failed").
Str("file", f.path + "/" + name).
Err(err).
Send()
return syscall.EROFS
}
log.Info("Unlink success").
Str("file", f.path + "/" + name).
Send()
return 0
}
var _ = (fs.NodeRmdirer)((*ITNode)(nil))
func (f *ITNode) Rmdir(ctx context.Context, name string) syscall.Errno {
return f.Unlink(ctx, name)
}