beginning fuse filesystem impl
This commit is contained in:
Ben Johnson
87
fs.go
Normal file
87
fs.go
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@@ -0,0 +1,87 @@
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package main
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import (
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"context"
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"io/ioutil"
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"os"
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"path/filepath"
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"syscall"
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"time"
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"bazil.org/fuse"
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"bazil.org/fuse/fs"
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)
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var _ fs.FS = (*FS)(nil)
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type FS struct {
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SourcePath string
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}
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// Root returns the file system root.
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func (f *FS) Root() (fs.Node, error) {
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return &File{fs: f}, nil
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}
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var _ fs.Node = (*File)(nil)
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type File struct {
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fs *FS // base filesystem
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path string // path within file system
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}
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func (f *File) srcpath() string {
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return filepath.Join(f.fs.SourcePath, f.path)
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}
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func (f *File) Attr(ctx context.Context, a *fuse.Attr) error {
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fi, err := os.Stat(f.srcpath())
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if err != nil {
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return err
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}
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statt := fi.Sys().(*syscall.Stat_t)
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// TODO: Cache attr w/ a.Valid?
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if f.path == "" {
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a.Inode = 1
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} else {
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a.Inode = statt.Ino
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}
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a.Size = uint64(fi.Size())
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a.Blocks = uint64(statt.Blocks)
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a.Atime = time.Unix(statt.Atim.Sec, statt.Atim.Nsec).UTC()
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a.Mtime = time.Unix(statt.Mtim.Sec, statt.Mtim.Nsec).UTC()
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a.Ctime = time.Unix(statt.Ctim.Sec, statt.Ctim.Nsec).UTC()
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a.Mode = fi.Mode()
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a.Nlink = uint32(statt.Nlink)
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a.Uid = uint32(statt.Uid)
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a.Gid = uint32(statt.Gid)
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a.Rdev = uint32(statt.Rdev)
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a.BlockSize = uint32(statt.Blksize)
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return nil
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}
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func (f *File) Lookup(ctx context.Context, name string) (fs.Node, error) {
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path := filepath.Join(f.path, name)
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srcpath := filepath.Join(f.fs.SourcePath, path)
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if _, err := os.Stat(srcpath); os.IsNotExist(err) {
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return nil, syscall.ENOENT
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}
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return &File{fs: f.fs, path: path}, nil
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}
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func (f *File) ReadDirAll(ctx context.Context) ([]fuse.Dirent, error) {
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fis, err := ioutil.ReadDir(f.srcpath())
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if err != nil {
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return nil, err
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}
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ents := make([]fuse.Dirent, len(fis))
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for i, fi := range fis {
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statt := fi.Sys().(*syscall.Stat_t)
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ents[i] = fuse.Dirent{Inode: statt.Ino, Name: fi.Name()}
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}
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return ents, nil
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}
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7
go.mod
Normal file
7
go.mod
Normal file
@@ -0,0 +1,7 @@
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module github.com/middlemost/litestream
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go 1.14
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require (
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bazil.org/fuse v0.0.0-20200524192727-fb710f7dfd05
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)
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31
go.sum
Normal file
31
go.sum
Normal file
@@ -0,0 +1,31 @@
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bazil.org/fuse v0.0.0-20200524192727-fb710f7dfd05 h1:UrYe9YkT4Wpm6D+zByEyCJQzDqTPXqTDUI7bZ41i9VE=
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bazil.org/fuse v0.0.0-20200524192727-fb710f7dfd05/go.mod h1:h0h5FBYpXThbvSfTqthw+0I4nmHnhTHkO5BoOHsBWqg=
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github.com/Julusian/godocdown v0.0.0-20170816220326-6d19f8ff2df8/go.mod h1:INZr5t32rG59/5xeltqoCJoNY7e5x/3xoY9WSWVWg74=
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github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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github.com/dvyukov/go-fuzz v0.0.0-20200318091601-be3528f3a813/go.mod h1:11Gm+ccJnvAhCNLlf5+cS9KjtbaD5I5zaZpFMsTHWTw=
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github.com/elazarl/go-bindata-assetfs v1.0.0/go.mod h1:v+YaWX3bdea5J/mo8dSETolEo7R71Vk1u8bnjau5yw4=
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github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
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github.com/robertkrimen/godocdown v0.0.0-20130622164427-0bfa04905481/go.mod h1:C9WhFzY47SzYBIvzFqSvHIR6ROgDo4TtdTuRaOMjF/s=
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github.com/stephens2424/writerset v1.0.2/go.mod h1:aS2JhsMn6eA7e82oNmW4rfsgAOp9COBTTl8mzkwADnc=
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github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
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github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
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github.com/tv42/httpunix v0.0.0-20191220191345-2ba4b9c3382c/go.mod h1:hzIxponao9Kjc7aWznkXaL4U4TWaDSs8zcsY4Ka08nM=
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github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
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golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
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golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
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golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
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golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
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golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
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golang.org/x/net v0.0.0-20200226121028-0de0cce0169b/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
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golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
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golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
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golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
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golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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golang.org/x/sys v0.0.0-20191210023423-ac6580df4449 h1:gSbV7h1NRL2G1xTg/owz62CST1oJBmxy4QpMMregXVQ=
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golang.org/x/sys v0.0.0-20191210023423-ac6580df4449/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
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golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
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golang.org/x/tools v0.0.0-20200423201157-2723c5de0d66/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
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golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
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golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
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golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
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81
main.go
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81
main.go
Normal file
@@ -0,0 +1,81 @@
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package main
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import (
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"errors"
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"flag"
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"fmt"
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"io/ioutil"
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"log"
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"os"
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"bazil.org/fuse"
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"bazil.org/fuse/fs"
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)
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func main() {
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m := NewMain()
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if err := m.Run(os.Args[1:]); err == flag.ErrHelp {
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os.Exit(1)
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} else if err != nil {
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fmt.Fprintln(os.Stderr, err)
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os.Exit(1)
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}
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}
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type Main struct {
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logger *log.Logger
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SourcePath string
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MountPath string
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}
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func NewMain() *Main {
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return &Main{
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logger: log.New(ioutil.Discard, "", log.LstdFlags),
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}
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}
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func (m *Main) Run(args []string) (err error) {
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flagSet := flag.NewFlagSet("litestream", flag.ContinueOnError)
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verbose := flagSet.Bool("v", false, "verbose")
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flagSet.Usage = m.usage
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if err := flagSet.Parse(args); err != nil {
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return err
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}
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if m.SourcePath = flagSet.Arg(0); m.SourcePath == "" {
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return errors.New("source path required")
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} else if m.MountPath = flagSet.Arg(1); m.MountPath == "" {
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return errors.New("mount path required")
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}
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// Setup logging, if verbose specified.
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if *verbose {
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m.logger = log.New(os.Stderr, "", log.LstdFlags)
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}
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// Mount FUSE filesystem.
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conn, err := fuse.Mount(m.MountPath, fuse.FSName("litestream"), fuse.Subtype("litestreamfs"))
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if err != nil {
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return err
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}
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defer fuse.Unmount(m.MountPath)
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defer conn.Close()
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return fs.Serve(conn, &FS{SourcePath: m.SourcePath})
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}
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func (m *Main) usage() {
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fmt.Println(`
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Litestream is a FUSE file system that automatically replicates SQLite databases.
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Usage:
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litestream [arguments] source_dir mount_dir
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Arguments:
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-v
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Enable verbose logging.
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`[1:])
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}
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237
server.go
Normal file
237
server.go
Normal file
@@ -0,0 +1,237 @@
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package main
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/*
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import (
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"context"
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"io"
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"sync"
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"bazil.org/fuse"
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)
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type Server struct {
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wg sync.WaitGroup
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SourcePath string
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}
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func NewServer() *Server {
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return &Server{}
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}
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func (s *Server) Close() error {
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s.wg.Wait()
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return nil
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}
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func (s *Server) Serve(ctx context.Context, conn *fuse.Conn) error {
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for {
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r, err := conn.ReadRequest()
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if err == io.EOF {
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return nil
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} else if err != nil {
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return err
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}
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s.wg.Add(1)
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go func() { defer s.wg.Done(); s.handleRequest(ctx, r) }()
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}
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}
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func (s *Server) handleRequest(ctx context.Context, r fuse.Request) {
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switch r := r.(type) {
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case *fuse.AccessRequest:
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s.handleAccessRequest(ctx, r)
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case *fuse.BatchForgetRequest:
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s.handleBatchForgetRequest(ctx, r)
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case *fuse.CreateRequest:
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s.handleCreateRequest(ctx, r)
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case *fuse.DestroyRequest:
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s.handleDestroyRequest(ctx, r)
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case *fuse.ExchangeDataRequest:
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s.handleExchangeDataRequest(ctx, r)
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case *fuse.FlushRequest:
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s.handleFlushRequest(ctx, r)
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case *fuse.ForgetRequest:
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s.handleForgetRequest(ctx, r)
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case *fuse.FsyncRequest:
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s.handleFsyncRequest(ctx, r)
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case *fuse.GetattrRequest:
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s.handleGetattrRequest(ctx, r)
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case *fuse.GetxattrRequest:
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s.handleGetxattrRequest(ctx, r)
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case *fuse.InterruptRequest:
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s.handleInterruptRequest(ctx, r)
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case *fuse.LinkRequest:
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s.handleLinkRequest(ctx, r)
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case *fuse.ListxattrRequest:
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s.handleListxattrRequest(ctx, r)
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case *fuse.LockRequest:
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s.handleLockRequest(ctx, r)
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case *fuse.LookupRequest:
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s.handleLookupRequest(ctx, r)
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case *fuse.MkdirRequest:
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s.handleMkdirRequest(ctx, r)
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case *fuse.MknodRequest:
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s.handleMknodRequest(ctx, r)
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case *fuse.OpenRequest:
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s.handleOpenRequest(ctx, r)
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case *fuse.PollRequest:
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s.handlePollRequest(ctx, r)
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case *fuse.QueryLockRequest:
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s.handleQueryLockRequest(ctx, r)
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case *fuse.ReadRequest:
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s.handleReadRequest(ctx, r)
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case *fuse.ReadlinkRequest:
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s.handleReadlinkRequest(ctx, r)
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case *fuse.ReleaseRequest:
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s.handleReleaseRequest(ctx, r)
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case *fuse.RemoveRequest:
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s.handleRemoveRequest(ctx, r)
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case *fuse.RemovexattrRequest:
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s.handleRemovexattrRequest(ctx, r)
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case *fuse.RenameRequest:
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s.handleRenameRequest(ctx, r)
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case *fuse.SetattrRequest:
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s.handleSetattrRequest(ctx, r)
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case *fuse.SetxattrRequest:
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s.handleSetxattrRequest(ctx, r)
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case *fuse.StatfsRequest:
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s.handleStatfsRequest(ctx, r)
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case *fuse.SymlinkRequest:
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s.handleSymlinkRequest(ctx, r)
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case *fuse.UnrecognizedRequest:
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s.handleUnrecognizedRequest(ctx, r)
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case *fuse.WriteRequest:
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s.handleWriteRequest(ctx, r)
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}
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}
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func (s *Server) handleAccessRequest(ctx context.Context, r *fuse.AccessRequest) {
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panic("TODO")
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}
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|
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func (s *Server) handleBatchForgetRequest(ctx context.Context, r *fuse.BatchForgetRequest) {
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panic("TODO")
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}
|
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|
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func (s *Server) handleCreateRequest(ctx context.Context, r *fuse.CreateRequest) {
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panic("TODO")
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}
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func (s *Server) handleDestroyRequest(ctx context.Context, r *fuse.DestroyRequest) {
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panic("TODO")
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}
|
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|
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func (s *Server) handleExchangeDataRequest(ctx context.Context, r *fuse.ExchangeDataRequest) {
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panic("TODO")
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}
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func (s *Server) handleFlushRequest(ctx context.Context, r *fuse.FlushRequest) {
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panic("TODO")
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}
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|
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func (s *Server) handleForgetRequest(ctx context.Context, r *fuse.ForgetRequest) {
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panic("TODO")
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}
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|
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func (s *Server) handleFsyncRequest(ctx context.Context, r *fuse.FsyncRequest) {
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panic("TODO")
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}
|
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|
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func (s *Server) handleGetattrRequest(ctx context.Context, r *fuse.GetattrRequest) {
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panic("TODO")
|
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}
|
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|
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func (s *Server) handleGetxattrRequest(ctx context.Context, r *fuse.GetxattrRequest) {
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panic("TODO")
|
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}
|
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|
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func (s *Server) handleInterruptRequest(ctx context.Context, r *fuse.InterruptRequest) {
|
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panic("TODO")
|
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}
|
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|
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func (s *Server) handleLinkRequest(ctx context.Context, r *fuse.LinkRequest) {
|
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panic("TODO")
|
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}
|
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|
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func (s *Server) handleListxattrRequest(ctx context.Context, r *fuse.ListxattrRequest) {
|
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panic("TODO")
|
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}
|
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|
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func (s *Server) handleLockRequest(ctx context.Context, r *fuse.LockRequest) {
|
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panic("TODO")
|
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}
|
||||
|
||||
func (s *Server) handleLookupRequest(ctx context.Context, r *fuse.LookupRequest) {
|
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panic("TODO")
|
||||
}
|
||||
|
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func (s *Server) handleMkdirRequest(ctx context.Context, r *fuse.MkdirRequest) {
|
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panic("TODO")
|
||||
}
|
||||
|
||||
func (s *Server) handleMknodRequest(ctx context.Context, r *fuse.MknodRequest) {
|
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panic("TODO")
|
||||
}
|
||||
|
||||
func (s *Server) handleOpenRequest(ctx context.Context, r *fuse.OpenRequest) {
|
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panic("TODO")
|
||||
}
|
||||
|
||||
func (s *Server) handlePollRequest(ctx context.Context, r *fuse.PollRequest) {
|
||||
panic("TODO")
|
||||
}
|
||||
|
||||
func (s *Server) handleQueryLockRequest(ctx context.Context, r *fuse.QueryLockRequest) {
|
||||
panic("TODO")
|
||||
}
|
||||
|
||||
func (s *Server) handleReadRequest(ctx context.Context, r *fuse.ReadRequest) {
|
||||
panic("TODO")
|
||||
}
|
||||
|
||||
func (s *Server) handleReadlinkRequest(ctx context.Context, r *fuse.ReadlinkRequest) {
|
||||
panic("TODO")
|
||||
}
|
||||
|
||||
func (s *Server) handleReleaseRequest(ctx context.Context, r *fuse.ReleaseRequest) {
|
||||
panic("TODO")
|
||||
}
|
||||
|
||||
func (s *Server) handleRemoveRequest(ctx context.Context, r *fuse.RemoveRequest) {
|
||||
panic("TODO")
|
||||
}
|
||||
|
||||
func (s *Server) handleRemovexattrRequest(ctx context.Context, r *fuse.RemovexattrRequest) {
|
||||
panic("TODO")
|
||||
}
|
||||
|
||||
func (s *Server) handleRenameRequest(ctx context.Context, r *fuse.RenameRequest) {
|
||||
panic("TODO")
|
||||
}
|
||||
|
||||
func (s *Server) handleSetattrRequest(ctx context.Context, r *fuse.SetattrRequest) {
|
||||
panic("TODO")
|
||||
}
|
||||
|
||||
func (s *Server) handleSetxattrRequest(ctx context.Context, r *fuse.SetxattrRequest) {
|
||||
panic("TODO")
|
||||
}
|
||||
|
||||
func (s *Server) handleStatfsRequest(ctx context.Context, r *fuse.StatfsRequest) {
|
||||
panic("TODO")
|
||||
}
|
||||
|
||||
func (s *Server) handleSymlinkRequest(ctx context.Context, r *fuse.SymlinkRequest) {
|
||||
panic("TODO")
|
||||
}
|
||||
|
||||
func (s *Server) handleUnrecognizedRequest(ctx context.Context, r *fuse.UnrecognizedRequest) {
|
||||
panic("TODO")
|
||||
}
|
||||
|
||||
func (s *Server) handleWriteRequest(ctx context.Context, r *fuse.WriteRequest) {
|
||||
panic("TODO")
|
||||
}
|
||||
*/
|
||||
Reference in New Issue
Block a user