func newDir() *Dir {
t := newFakeTransport()
n := NewRootEntry(t, "/local")
n.ID = fuseops.InodeID(fuseops.RootInodeID + 1)
i := NewIDGen()
return NewDir(n, i)
}
// Allocate a new inode, assigning it an ID that is not in use.
//
// LOCKS_REQUIRED(fs.mu)
func (fs *memFS) allocateInode(
attrs fuseops.InodeAttributes) (id fuseops.InodeID, inode *inode) {
// Create the inode.
inode = newInode(attrs)
// Re-use a free ID if possible. Otherwise mint a new one.
numFree := len(fs.freeInodes)
if numFree != 0 {
id = fs.freeInodes[numFree-1]
fs.freeInodes = fs.freeInodes[:numFree-1]
fs.inodes[id] = inode
} else {
id = fuseops.InodeID(len(fs.inodes))
fs.inodes = append(fs.inodes, inode)
}
return
}
func (fs *memFS) checkInvariants() {
// Check reserved inodes.
for i := 0; i < fuseops.RootInodeID; i++ {
if fs.inodes[i] != nil {
panic(fmt.Sprintf("Non-nil inode for ID: %v", i))
}
}
// Check the root inode.
if !fs.inodes[fuseops.RootInodeID].isDir() {
panic("Expected root to be a directory.")
}
// Build our own list of free IDs.
freeIDsEncountered := make(map[fuseops.InodeID]struct{})
for i := fuseops.RootInodeID + 1; i < len(fs.inodes); i++ {
inode := fs.inodes[i]
if inode == nil {
freeIDsEncountered[fuseops.InodeID(i)] = struct{}{}
continue
}
}
// Check fs.freeInodes.
if len(fs.freeInodes) != len(freeIDsEncountered) {
panic(
fmt.Sprintf(
"Length mismatch: %v vs. %v",
len(fs.freeInodes),
len(freeIDsEncountered)))
}
for _, id := range fs.freeInodes {
if _, ok := freeIDsEncountered[id]; !ok {
panic(fmt.Sprintf("Unexected free inode ID: %v", id))
}
}
// INVARIANT: For each inode in, in.CheckInvariants() does not panic.
for _, in := range fs.inodes {
in.CheckInvariants()
}
}
func (s *OssvfsTest) TestGetRootInode(t *C) {
root := s.getRoot(t)
t.Assert(root.Id, Equals, fuseops.InodeID(fuseops.RootInodeID))
}
func TestKodingNetworkFSUnit(tt *testing.T) {
i := fuseops.InodeID(fuseops.RootInodeID + 1)
var t transport.Transport
// Convey("NewKodingNetworkFS", t, func() {
// })
ctx := context.TODO()
Convey("KodingNetworkFS#getDir", tt, func() {
Convey("It should return error if specified id is not a directory", func() {
k := newknfs(t)
f, err := newFile()
So(err, ShouldBeNil)
k.liveNodes[i] = f
_, err = k.getDir(ctx, i)
So(err, ShouldEqual, fuse.EIO)
})
Convey("It should return directory with specified id", func() {
k := newknfs(t)
k.liveNodes[i] = newDir()
dir, err := k.getDir(ctx, i)
So(err, ShouldBeNil)
So(dir, ShouldHaveSameTypeAs, &Dir{})
})
})
Convey("KodingNetworkFS#getFile", tt, func() {
Convey("It should return error if specified id is not a file", func() {
k := newknfs(t)
k.liveNodes[i] = newDir()
_, err := k.getFile(ctx, i)
So(err, ShouldEqual, fuse.EIO)
})
Convey("It should return file with specified id", func() {
k := newknfs(t)
f, err := newFile()
So(err, ShouldBeNil)
k.liveNodes[i] = f
file, err := k.getEntry(ctx, i)
So(err, ShouldBeNil)
So(file, ShouldHaveSameTypeAs, &File{})
})
})
Convey("KodingNetworkFS#getEntry", tt, func() {
Convey("It should return error if specified id doesn't exit", func() {
k := newknfs(t)
_, err := k.getEntry(ctx, i)
So(err, ShouldEqual, fuse.ENOENT)
})
Convey("It should return entry with specified id", func() {
k := newknfs(t)
k.liveNodes[i] = newDir()
_, err := k.getEntry(ctx, i)
So(err, ShouldBeNil)
})
})
Convey("KodingNetworkFS#setEntry", tt, func() {
k := newknfs(t)
d := newDir()
k.setEntry(d.GetID(), d)
So(len(k.liveNodes), ShouldEqual, 2)
dir, ok := k.liveNodes[i]
So(ok, ShouldBeTrue)
So(d, ShouldEqual, dir)
})
Convey("KodingNetworkFS#deleteEntry", tt, func() {
k := newknfs(t)
k.liveNodes[i] = newDir()
k.deleteEntry(i)
So(len(k.liveNodes), ShouldEqual, 1)
_, ok := k.liveNodes[i]
So(ok, ShouldBeFalse)
})
}
// Convert a kernel message to an appropriate op. If the op is unknown, a
// special unexported type will be used.
//
// The caller is responsible for arranging for the message to be destroyed.
func convertInMessage(
inMsg *buffer.InMessage,
outMsg *buffer.OutMessage,
protocol fusekernel.Protocol) (o interface{}, err error) {
switch inMsg.Header().Opcode {
case fusekernel.OpLookup:
buf := inMsg.ConsumeBytes(inMsg.Len())
n := len(buf)
if n == 0 || buf[n-1] != '\x00' {
err = errors.New("Corrupt OpLookup")
return
}
o = &fuseops.LookUpInodeOp{
Parent: fuseops.InodeID(inMsg.Header().Nodeid),
Name: string(buf[:n-1]),
}
case fusekernel.OpGetattr:
o = &fuseops.GetInodeAttributesOp{
Inode: fuseops.InodeID(inMsg.Header().Nodeid),
}
case fusekernel.OpSetattr:
type input fusekernel.SetattrIn
in := (*input)(inMsg.Consume(unsafe.Sizeof(input{})))
if in == nil {
err = errors.New("Corrupt OpSetattr")
return
}
to := &fuseops.SetInodeAttributesOp{
Inode: fuseops.InodeID(inMsg.Header().Nodeid),
}
o = to
valid := fusekernel.SetattrValid(in.Valid)
if valid&fusekernel.SetattrSize != 0 {
to.Size = &in.Size
}
if valid&fusekernel.SetattrMode != 0 {
mode := convertFileMode(in.Mode)
to.Mode = &mode
}
if valid&fusekernel.SetattrAtime != 0 {
t := time.Unix(int64(in.Atime), int64(in.AtimeNsec))
to.Atime = &t
}
if valid&fusekernel.SetattrMtime != 0 {
t := time.Unix(int64(in.Mtime), int64(in.MtimeNsec))
to.Mtime = &t
}
case fusekernel.OpForget:
type input fusekernel.ForgetIn
in := (*input)(inMsg.Consume(unsafe.Sizeof(input{})))
if in == nil {
err = errors.New("Corrupt OpForget")
return
}
o = &fuseops.ForgetInodeOp{
Inode: fuseops.InodeID(inMsg.Header().Nodeid),
N: in.Nlookup,
}
case fusekernel.OpMkdir:
in := (*fusekernel.MkdirIn)(inMsg.Consume(fusekernel.MkdirInSize(protocol)))
if in == nil {
err = errors.New("Corrupt OpMkdir")
return
}
name := inMsg.ConsumeBytes(inMsg.Len())
i := bytes.IndexByte(name, '\x00')
if i < 0 {
err = errors.New("Corrupt OpMkdir")
return
}
name = name[:i]
o = &fuseops.MkDirOp{
Parent: fuseops.InodeID(inMsg.Header().Nodeid),
Name: string(name),
// On Linux, vfs_mkdir calls through to the inode with at most
// permissions and sticky bits set (cf. https://goo.gl/WxgQXk), and fuse
// passes that on directly (cf. https://goo.gl/f31aMo). In other words,
// the fact that this is a directory is implicit in the fact that the
// opcode is mkdir. But we want the correct mode to go through, so ensure
// that os.ModeDir is set.
Mode: convertFileMode(in.Mode) | os.ModeDir,
}
case fusekernel.OpCreate:
in := (*fusekernel.CreateIn)(inMsg.Consume(fusekernel.CreateInSize(protocol)))
if in == nil {
err = errors.New("Corrupt OpCreate")
return
}
name := inMsg.ConsumeBytes(inMsg.Len())
i := bytes.IndexByte(name, '\x00')
if i < 0 {
err = errors.New("Corrupt OpCreate")
return
}
name = name[:i]
o = &fuseops.CreateFileOp{
Parent: fuseops.InodeID(inMsg.Header().Nodeid),
Name: string(name),
Mode: convertFileMode(in.Mode),
}
case fusekernel.OpSymlink:
// The message is "newName\0target\0".
names := inMsg.ConsumeBytes(inMsg.Len())
if len(names) == 0 || names[len(names)-1] != 0 {
err = errors.New("Corrupt OpSymlink")
return
}
i := bytes.IndexByte(names, '\x00')
if i < 0 {
err = errors.New("Corrupt OpSymlink")
return
}
newName, target := names[0:i], names[i+1:len(names)-1]
o = &fuseops.CreateSymlinkOp{
Parent: fuseops.InodeID(inMsg.Header().Nodeid),
Name: string(newName),
Target: string(target),
}
case fusekernel.OpRename:
type input fusekernel.RenameIn
in := (*input)(inMsg.Consume(unsafe.Sizeof(input{})))
if in == nil {
err = errors.New("Corrupt OpRename")
return
}
names := inMsg.ConsumeBytes(inMsg.Len())
// names should be "old\x00new\x00"
if len(names) < 4 {
err = errors.New("Corrupt OpRename")
return
}
if names[len(names)-1] != '\x00' {
err = errors.New("Corrupt OpRename")
return
}
i := bytes.IndexByte(names, '\x00')
if i < 0 {
err = errors.New("Corrupt OpRename")
return
}
oldName, newName := names[:i], names[i+1:len(names)-1]
o = &fuseops.RenameOp{
OldParent: fuseops.InodeID(inMsg.Header().Nodeid),
OldName: string(oldName),
NewParent: fuseops.InodeID(in.Newdir),
NewName: string(newName),
}
case fusekernel.OpUnlink:
buf := inMsg.ConsumeBytes(inMsg.Len())
n := len(buf)
if n == 0 || buf[n-1] != '\x00' {
err = errors.New("Corrupt OpUnlink")
return
}
o = &fuseops.UnlinkOp{
Parent: fuseops.InodeID(inMsg.Header().Nodeid),
Name: string(buf[:n-1]),
}
case fusekernel.OpRmdir:
buf := inMsg.ConsumeBytes(inMsg.Len())
n := len(buf)
if n == 0 || buf[n-1] != '\x00' {
err = errors.New("Corrupt OpRmdir")
return
}
o = &fuseops.RmDirOp{
Parent: fuseops.InodeID(inMsg.Header().Nodeid),
Name: string(buf[:n-1]),
}
case fusekernel.OpOpen:
o = &fuseops.OpenFileOp{
Inode: fuseops.InodeID(inMsg.Header().Nodeid),
}
case fusekernel.OpOpendir:
o = &fuseops.OpenDirOp{
Inode: fuseops.InodeID(inMsg.Header().Nodeid),
}
case fusekernel.OpRead:
in := (*fusekernel.ReadIn)(inMsg.Consume(fusekernel.ReadInSize(protocol)))
if in == nil {
err = errors.New("Corrupt OpRead")
return
}
to := &fuseops.ReadFileOp{
Inode: fuseops.InodeID(inMsg.Header().Nodeid),
Handle: fuseops.HandleID(in.Fh),
Offset: int64(in.Offset),
}
o = to
readSize := int(in.Size)
p := outMsg.GrowNoZero(uintptr(readSize))
if p == nil {
err = fmt.Errorf("Can't grow for %d-byte read", readSize)
return
}
sh := (*reflect.SliceHeader)(unsafe.Pointer(&to.Dst))
sh.Data = uintptr(p)
sh.Len = readSize
sh.Cap = readSize
case fusekernel.OpReaddir:
in := (*fusekernel.ReadIn)(inMsg.Consume(fusekernel.ReadInSize(protocol)))
if in == nil {
err = errors.New("Corrupt OpReaddir")
return
}
to := &fuseops.ReadDirOp{
Inode: fuseops.InodeID(inMsg.Header().Nodeid),
Handle: fuseops.HandleID(in.Fh),
Offset: fuseops.DirOffset(in.Offset),
}
o = to
readSize := int(in.Size)
p := outMsg.GrowNoZero(uintptr(readSize))
if p == nil {
err = fmt.Errorf("Can't grow for %d-byte read", readSize)
return
}
sh := (*reflect.SliceHeader)(unsafe.Pointer(&to.Dst))
sh.Data = uintptr(p)
sh.Len = readSize
sh.Cap = readSize
case fusekernel.OpRelease:
type input fusekernel.ReleaseIn
in := (*input)(inMsg.Consume(unsafe.Sizeof(input{})))
if in == nil {
err = errors.New("Corrupt OpRelease")
return
}
o = &fuseops.ReleaseFileHandleOp{
Handle: fuseops.HandleID(in.Fh),
}
case fusekernel.OpReleasedir:
type input fusekernel.ReleaseIn
in := (*input)(inMsg.Consume(unsafe.Sizeof(input{})))
if in == nil {
err = errors.New("Corrupt OpReleasedir")
return
}
o = &fuseops.ReleaseDirHandleOp{
Handle: fuseops.HandleID(in.Fh),
}
case fusekernel.OpWrite:
in := (*fusekernel.WriteIn)(inMsg.Consume(fusekernel.WriteInSize(protocol)))
if in == nil {
err = errors.New("Corrupt OpWrite")
return
}
buf := inMsg.ConsumeBytes(inMsg.Len())
if len(buf) < int(in.Size) {
err = errors.New("Corrupt OpWrite")
return
}
o = &fuseops.WriteFileOp{
Inode: fuseops.InodeID(inMsg.Header().Nodeid),
Handle: fuseops.HandleID(in.Fh),
Data: buf,
Offset: int64(in.Offset),
}
case fusekernel.OpFsync:
type input fusekernel.FsyncIn
in := (*input)(inMsg.Consume(unsafe.Sizeof(input{})))
if in == nil {
err = errors.New("Corrupt OpFsync")
return
}
o = &fuseops.SyncFileOp{
Inode: fuseops.InodeID(inMsg.Header().Nodeid),
Handle: fuseops.HandleID(in.Fh),
}
case fusekernel.OpFlush:
type input fusekernel.FlushIn
in := (*input)(inMsg.Consume(unsafe.Sizeof(input{})))
if in == nil {
err = errors.New("Corrupt OpFlush")
return
}
o = &fuseops.FlushFileOp{
Inode: fuseops.InodeID(inMsg.Header().Nodeid),
Handle: fuseops.HandleID(in.Fh),
}
case fusekernel.OpReadlink:
o = &fuseops.ReadSymlinkOp{
Inode: fuseops.InodeID(inMsg.Header().Nodeid),
}
case fusekernel.OpStatfs:
o = &statFSOp{}
case fusekernel.OpInterrupt:
type input fusekernel.InterruptIn
in := (*input)(inMsg.Consume(unsafe.Sizeof(input{})))
if in == nil {
err = errors.New("Corrupt OpInterrupt")
return
}
o = &interruptOp{
FuseID: in.Unique,
}
case fusekernel.OpInit:
type input fusekernel.InitIn
in := (*input)(inMsg.Consume(unsafe.Sizeof(input{})))
if in == nil {
err = errors.New("Corrupt OpInit")
return
}
o = &initOp{
Kernel: fusekernel.Protocol{in.Major, in.Minor},
MaxReadahead: in.MaxReadahead,
Flags: fusekernel.InitFlags(in.Flags),
}
default:
o = &unknownOp{
OpCode: inMsg.Header().Opcode,
Inode: fuseops.InodeID(inMsg.Header().Nodeid),
}
}
return
}
