/usr/share/gocode/src/github.com/jacobsa/fuse/fuseutil/file_system.go is in golang-github-jacobsa-fuse-dev 0.0~git20150806.0.9a7512a-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 | // Copyright 2015 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package fuseutil
import (
"io"
"sync"
"golang.org/x/net/context"
"github.com/jacobsa/fuse"
"github.com/jacobsa/fuse/fuseops"
)
// An interface with a method for each op type in the fuseops package. This can
// be used in conjunction with NewFileSystemServer to avoid writing a "dispatch
// loop" that switches on op types, instead receiving typed method calls
// directly.
//
// The FileSystem implementation should not call Connection.Reply, instead
// returning the error with which the caller should respond.
//
// See NotImplementedFileSystem for a convenient way to embed default
// implementations for methods you don't care about.
type FileSystem interface {
LookUpInode(context.Context, *fuseops.LookUpInodeOp) error
GetInodeAttributes(context.Context, *fuseops.GetInodeAttributesOp) error
SetInodeAttributes(context.Context, *fuseops.SetInodeAttributesOp) error
ForgetInode(context.Context, *fuseops.ForgetInodeOp) error
MkDir(context.Context, *fuseops.MkDirOp) error
CreateFile(context.Context, *fuseops.CreateFileOp) error
CreateSymlink(context.Context, *fuseops.CreateSymlinkOp) error
Rename(context.Context, *fuseops.RenameOp) error
RmDir(context.Context, *fuseops.RmDirOp) error
Unlink(context.Context, *fuseops.UnlinkOp) error
OpenDir(context.Context, *fuseops.OpenDirOp) error
ReadDir(context.Context, *fuseops.ReadDirOp) error
ReleaseDirHandle(context.Context, *fuseops.ReleaseDirHandleOp) error
OpenFile(context.Context, *fuseops.OpenFileOp) error
ReadFile(context.Context, *fuseops.ReadFileOp) error
WriteFile(context.Context, *fuseops.WriteFileOp) error
SyncFile(context.Context, *fuseops.SyncFileOp) error
FlushFile(context.Context, *fuseops.FlushFileOp) error
ReleaseFileHandle(context.Context, *fuseops.ReleaseFileHandleOp) error
ReadSymlink(context.Context, *fuseops.ReadSymlinkOp) error
// Regard all inodes (including the root inode) as having their lookup counts
// decremented to zero, and clean up any resources associated with the file
// system. No further calls to the file system will be made.
Destroy()
}
// Create a fuse.Server that handles ops by calling the associated FileSystem
// method.Respond with the resulting error. Unsupported ops are responded to
// directly with ENOSYS.
//
// Each call to a FileSystem method is made on its own goroutine, and is free
// to block.
//
// (It is safe to naively process ops concurrently because the kernel
// guarantees to serialize operations that the user expects to happen in order,
// cf. http://goo.gl/jnkHPO, fuse-devel thread "Fuse guarantees on concurrent
// requests").
func NewFileSystemServer(fs FileSystem) fuse.Server {
return &fileSystemServer{
fs: fs,
}
}
type fileSystemServer struct {
fs FileSystem
opsInFlight sync.WaitGroup
}
func (s *fileSystemServer) ServeOps(c *fuse.Connection) {
// When we are done, we clean up by waiting for all in-flight ops then
// destroying the file system.
defer func() {
s.opsInFlight.Wait()
s.fs.Destroy()
}()
for {
ctx, op, err := c.ReadOp()
if err == io.EOF {
break
}
if err != nil {
panic(err)
}
s.opsInFlight.Add(1)
go s.handleOp(c, ctx, op)
}
}
func (s *fileSystemServer) handleOp(
c *fuse.Connection,
ctx context.Context,
op interface{}) {
defer s.opsInFlight.Done()
// Dispatch to the appropriate method.
var err error
switch typed := op.(type) {
default:
err = fuse.ENOSYS
case *fuseops.LookUpInodeOp:
err = s.fs.LookUpInode(ctx, typed)
case *fuseops.GetInodeAttributesOp:
err = s.fs.GetInodeAttributes(ctx, typed)
case *fuseops.SetInodeAttributesOp:
err = s.fs.SetInodeAttributes(ctx, typed)
case *fuseops.ForgetInodeOp:
err = s.fs.ForgetInode(ctx, typed)
case *fuseops.MkDirOp:
err = s.fs.MkDir(ctx, typed)
case *fuseops.CreateFileOp:
err = s.fs.CreateFile(ctx, typed)
case *fuseops.CreateSymlinkOp:
err = s.fs.CreateSymlink(ctx, typed)
case *fuseops.RenameOp:
err = s.fs.Rename(ctx, typed)
case *fuseops.RmDirOp:
err = s.fs.RmDir(ctx, typed)
case *fuseops.UnlinkOp:
err = s.fs.Unlink(ctx, typed)
case *fuseops.OpenDirOp:
err = s.fs.OpenDir(ctx, typed)
case *fuseops.ReadDirOp:
err = s.fs.ReadDir(ctx, typed)
case *fuseops.ReleaseDirHandleOp:
err = s.fs.ReleaseDirHandle(ctx, typed)
case *fuseops.OpenFileOp:
err = s.fs.OpenFile(ctx, typed)
case *fuseops.ReadFileOp:
err = s.fs.ReadFile(ctx, typed)
case *fuseops.WriteFileOp:
err = s.fs.WriteFile(ctx, typed)
case *fuseops.SyncFileOp:
err = s.fs.SyncFile(ctx, typed)
case *fuseops.FlushFileOp:
err = s.fs.FlushFile(ctx, typed)
case *fuseops.ReleaseFileHandleOp:
err = s.fs.ReleaseFileHandle(ctx, typed)
case *fuseops.ReadSymlinkOp:
err = s.fs.ReadSymlink(ctx, typed)
}
c.Reply(ctx, err)
}
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