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huangapple
go评论106阅读模式
英文:

go-fuse Open file

问题

使用go-fuse创建了一个FUSE文件系统：nodefs。除了文件无法打开之外，一切都正常工作。

基本上，文件节点的结构如下：

  1. type SomeFileNode struct {
  2.     nodefs.Node
  3.     content string
  4. }
  5.  
  6. func (this *SomeFileNode) Open(flags uint32, context *fuse.Context) (nodefs.File, fuse.Status) {
  7.     return nodefs.NewDataFile([]byte(this.content)), fuse.OK
  8. }

我期望使用cat命令来查看该文件，但是没有任何内容打印到标准输出。

我漏掉了什么？

完整的复现代码如下：

  1. func main() {
  2.     mountPoint := "/some/mountpoint"
  3.     fs := &SomeFs{Root: &SomeRootNode{nodefs.NewDefaultNode()}}
  4.     server, _, err := nodefs.MountRoot(mountPoint, fs.Root, nil)
  5.     if err != nil {
  6.         log.Fatalln("Mount fail")
  7.         os.Exit(1)
  8.     }
  9.     server.Serve()
  10. }
  13. type SomeFs struct {
  14.     Root *SomeRootNode
  15. }
  17. type SomeRootNode struct {
  18.     nodefs.Node
  19. }
  21. type SomeFileNode struct {
  22.     nodefs.Node
  23.     content string
  24. }
  26. func (this *SomeRootNode) OnMount(c *nodefs.FileSystemConnector) {
  27.     this.Inode().NewChild("leaf", false, &SomeFileNode{Node: nodefs.NewDefaultNode(), content: "hello"})
  28. }
  30. func (this *SomeFileNode) Open(flags uint32, context *fuse.Context) (nodefs.File, fuse.Status) {
  31.     return nodefs.NewDataFile([]byte(this.content)), fuse.OK
  32. }
英文:

Created a FUSE filesystem using go-fuse : nodefs. Everything works except files are not opened.

Basically the file node is like:

  1. type SomeFileNode struct {
  2.     nodefs.Node
  3.     content string
  4. }
  5.  
  6. func (this *SomeFileNode) Open(flags uint32, context *fuse.Context) (nodefs.File, fuse.Status) {
  7.     return nodefs.NewDataFile([]byte(this.content)), fuse.OK
  8. }

I expect to cat that file, but nothing is printed to stdout.

What am I missing?

Full repro code:

  1. func main() {
  2. 	mountPoint := "/some/mountpoint"
  3. 	fs := &SomeFs{Root: &SomeRootNode{nodefs.NewDefaultNode()}}
  4. 	server, _, err := nodefs.MountRoot(mountPoint, fs.Root, nil)
  5. 	if err != nil {
  6. 		log.Fatalln("Mount fail")
  7. 		os.Exit(1)
  8. 	}
  9. 	server.Serve()
  10. }
  13. type SomeFs struct {
  14. 	Root *SomeRootNode
  15. }
  17. type SomeRootNode struct {
  18. 	nodefs.Node
  19. }
  21. type SomeFileNode struct {
  22. 	nodefs.Node
  23. 	content string
  24. }
  26. func (this *SomeRootNode) OnMount(c *nodefs.FileSystemConnector) {
  27. 	this.Inode().NewChild("leaf", false, &SomeFileNode{Node: nodefs.NewDefaultNode(), content: "hello"})
  28. }
  30. func (this *SomeFileNode) Open(flags uint32, context *fuse.Context) (nodefs.File, fuse.Status) {
  31. 	return nodefs.NewDataFile([]byte(this.content)), fuse.OK
  32. }

答案1

得分: 0

这里有答案：https://github.com/hanwen/go-fuse/issues/186

需要实现GetAttr并报告Size。

英文:

Was answered here: https://github.com/hanwen/go-fuse/issues/186

need to implement GetAttr and report Size.

huangapple
  • 本文由 发表于 2017年9月15日 02:20:14
  • 转载请务必保留本文链接：https://go.coder-hub.com/46225887.html
  • fuse
  • go
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