github.com/hanwen/go-fuse@v1.0.0/fuse/pathfs/locking.go (about)

     1  // Copyright 2016 the Go-FUSE Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package pathfs
     6  
     7  import (
     8  	"sync"
     9  	"time"
    10  
    11  	"github.com/hanwen/go-fuse/fuse"
    12  	"github.com/hanwen/go-fuse/fuse/nodefs"
    13  )
    14  
    15  type lockingFileSystem struct {
    16  	// Should be public so people reusing can access the wrapped
    17  	// FS.
    18  	FS   FileSystem
    19  	lock sync.Mutex
    20  }
    21  
    22  // NewLockingFileSystem is a wrapper that makes a FileSystem
    23  // threadsafe by serializing each operation.
    24  func NewLockingFileSystem(pfs FileSystem) FileSystem {
    25  	l := new(lockingFileSystem)
    26  	l.FS = pfs
    27  	return l
    28  }
    29  
    30  func (fs *lockingFileSystem) String() string {
    31  	defer fs.locked()()
    32  	return fs.FS.String()
    33  }
    34  
    35  func (fs *lockingFileSystem) SetDebug(debug bool) {
    36  	defer fs.locked()()
    37  	fs.FS.SetDebug(debug)
    38  }
    39  
    40  func (fs *lockingFileSystem) StatFs(name string) *fuse.StatfsOut {
    41  	defer fs.locked()()
    42  	return fs.FS.StatFs(name)
    43  }
    44  
    45  func (fs *lockingFileSystem) locked() func() {
    46  	fs.lock.Lock()
    47  	return func() { fs.lock.Unlock() }
    48  }
    49  
    50  func (fs *lockingFileSystem) GetAttr(name string, context *fuse.Context) (*fuse.Attr, fuse.Status) {
    51  	defer fs.locked()()
    52  	return fs.FS.GetAttr(name, context)
    53  }
    54  
    55  func (fs *lockingFileSystem) Readlink(name string, context *fuse.Context) (string, fuse.Status) {
    56  	defer fs.locked()()
    57  	return fs.FS.Readlink(name, context)
    58  }
    59  
    60  func (fs *lockingFileSystem) Mknod(name string, mode uint32, dev uint32, context *fuse.Context) fuse.Status {
    61  	defer fs.locked()()
    62  	return fs.FS.Mknod(name, mode, dev, context)
    63  }
    64  
    65  func (fs *lockingFileSystem) Mkdir(name string, mode uint32, context *fuse.Context) fuse.Status {
    66  	defer fs.locked()()
    67  	return fs.FS.Mkdir(name, mode, context)
    68  }
    69  
    70  func (fs *lockingFileSystem) Unlink(name string, context *fuse.Context) (code fuse.Status) {
    71  	defer fs.locked()()
    72  	return fs.FS.Unlink(name, context)
    73  }
    74  
    75  func (fs *lockingFileSystem) Rmdir(name string, context *fuse.Context) (code fuse.Status) {
    76  	defer fs.locked()()
    77  	return fs.FS.Rmdir(name, context)
    78  }
    79  
    80  func (fs *lockingFileSystem) Symlink(value string, linkName string, context *fuse.Context) (code fuse.Status) {
    81  	defer fs.locked()()
    82  	return fs.FS.Symlink(value, linkName, context)
    83  }
    84  
    85  func (fs *lockingFileSystem) Rename(oldName string, newName string, context *fuse.Context) (code fuse.Status) {
    86  	defer fs.locked()()
    87  	return fs.FS.Rename(oldName, newName, context)
    88  }
    89  
    90  func (fs *lockingFileSystem) Link(oldName string, newName string, context *fuse.Context) (code fuse.Status) {
    91  	defer fs.locked()()
    92  	return fs.FS.Link(oldName, newName, context)
    93  }
    94  
    95  func (fs *lockingFileSystem) Chmod(name string, mode uint32, context *fuse.Context) (code fuse.Status) {
    96  	defer fs.locked()()
    97  	return fs.FS.Chmod(name, mode, context)
    98  }
    99  
   100  func (fs *lockingFileSystem) Chown(name string, uid uint32, gid uint32, context *fuse.Context) (code fuse.Status) {
   101  	defer fs.locked()()
   102  	return fs.FS.Chown(name, uid, gid, context)
   103  }
   104  
   105  func (fs *lockingFileSystem) Truncate(name string, offset uint64, context *fuse.Context) (code fuse.Status) {
   106  	defer fs.locked()()
   107  	return fs.FS.Truncate(name, offset, context)
   108  }
   109  
   110  func (fs *lockingFileSystem) Open(name string, flags uint32, context *fuse.Context) (file nodefs.File, code fuse.Status) {
   111  	file, code = fs.FS.Open(name, flags, context)
   112  	file = nodefs.NewLockingFile(&fs.lock, file)
   113  	return
   114  }
   115  
   116  func (fs *lockingFileSystem) OpenDir(name string, context *fuse.Context) (stream []fuse.DirEntry, status fuse.Status) {
   117  	defer fs.locked()()
   118  	return fs.FS.OpenDir(name, context)
   119  }
   120  
   121  func (fs *lockingFileSystem) OnMount(nodeFs *PathNodeFs) {
   122  	defer fs.locked()()
   123  	fs.FS.OnMount(nodeFs)
   124  }
   125  
   126  func (fs *lockingFileSystem) OnUnmount() {
   127  	defer fs.locked()()
   128  	fs.FS.OnUnmount()
   129  }
   130  
   131  func (fs *lockingFileSystem) Access(name string, mode uint32, context *fuse.Context) (code fuse.Status) {
   132  	defer fs.locked()()
   133  	return fs.FS.Access(name, mode, context)
   134  }
   135  
   136  func (fs *lockingFileSystem) Create(name string, flags uint32, mode uint32, context *fuse.Context) (file nodefs.File, code fuse.Status) {
   137  	defer fs.locked()()
   138  	file, code = fs.FS.Create(name, flags, mode, context)
   139  
   140  	file = nodefs.NewLockingFile(&fs.lock, file)
   141  	return file, code
   142  }
   143  
   144  func (fs *lockingFileSystem) Utimens(name string, Atime *time.Time, Mtime *time.Time, context *fuse.Context) (code fuse.Status) {
   145  	defer fs.locked()()
   146  	return fs.FS.Utimens(name, Atime, Mtime, context)
   147  }
   148  
   149  func (fs *lockingFileSystem) GetXAttr(name string, attr string, context *fuse.Context) ([]byte, fuse.Status) {
   150  	defer fs.locked()()
   151  	return fs.FS.GetXAttr(name, attr, context)
   152  }
   153  
   154  func (fs *lockingFileSystem) SetXAttr(name string, attr string, data []byte, flags int, context *fuse.Context) fuse.Status {
   155  	defer fs.locked()()
   156  	return fs.FS.SetXAttr(name, attr, data, flags, context)
   157  }
   158  
   159  func (fs *lockingFileSystem) ListXAttr(name string, context *fuse.Context) ([]string, fuse.Status) {
   160  	defer fs.locked()()
   161  	return fs.FS.ListXAttr(name, context)
   162  }
   163  
   164  func (fs *lockingFileSystem) RemoveXAttr(name string, attr string, context *fuse.Context) fuse.Status {
   165  	defer fs.locked()()
   166  	return fs.FS.RemoveXAttr(name, attr, context)
   167  }