Rename buffer.Buffer to buffer.OutMessage.
In preparation for adding an InMessage.geesefs-0-30-9
commit
2199f98f19
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@ -36,7 +36,7 @@ type internalOp interface {
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//
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// Special case: a zero return value means that the kernel is not expecting a
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// response.
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kernelResponse() (b buffer.Buffer)
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kernelResponse() (b buffer.OutMessage)
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}
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// A function that sends a reply message back to the kernel for the request
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@ -142,11 +142,11 @@ func (o *commonOp) Respond(err error) {
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// If successful, we ask the op for an appopriate response to the kernel, and
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// it is responsible for leaving room for the fusekernel.OutHeader struct.
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// Otherwise, create our own.
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var b buffer.Buffer
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var b buffer.OutMessage
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if err == nil {
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b = o.op.kernelResponse()
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} else {
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b = buffer.New(0)
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b = buffer.NewOutMessage(0)
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}
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// Fill in the header if a reply is needed.
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@ -88,9 +88,9 @@ func (o *LookUpInodeOp) ShortDesc() (desc string) {
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return
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}
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func (o *LookUpInodeOp) kernelResponse() (b buffer.Buffer) {
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func (o *LookUpInodeOp) kernelResponse() (b buffer.OutMessage) {
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size := fusekernel.EntryOutSize(o.protocol)
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b = buffer.New(size)
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b = buffer.NewOutMessage(size)
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out := (*fusekernel.EntryOut)(b.Grow(size))
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convertChildInodeEntry(&o.Entry, out)
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@ -123,9 +123,9 @@ func (o *GetInodeAttributesOp) DebugString() string {
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o.Attributes.DebugString())
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}
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func (o *GetInodeAttributesOp) kernelResponse() (b buffer.Buffer) {
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func (o *GetInodeAttributesOp) kernelResponse() (b buffer.OutMessage) {
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size := fusekernel.AttrOutSize(o.protocol)
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b = buffer.New(size)
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b = buffer.NewOutMessage(size)
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out := (*fusekernel.AttrOut)(b.Grow(size))
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out.AttrValid, out.AttrValidNsec = convertExpirationTime(o.AttributesExpiration)
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convertAttributes(o.Inode, &o.Attributes, &out.Attr)
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@ -157,9 +157,9 @@ type SetInodeAttributesOp struct {
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AttributesExpiration time.Time
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}
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func (o *SetInodeAttributesOp) kernelResponse() (b buffer.Buffer) {
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func (o *SetInodeAttributesOp) kernelResponse() (b buffer.OutMessage) {
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size := fusekernel.AttrOutSize(o.protocol)
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b = buffer.New(size)
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b = buffer.NewOutMessage(size)
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out := (*fusekernel.AttrOut)(b.Grow(size))
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out.AttrValid, out.AttrValidNsec = convertExpirationTime(o.AttributesExpiration)
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convertAttributes(o.Inode, &o.Attributes, &out.Attr)
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@ -216,7 +216,7 @@ type ForgetInodeOp struct {
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N uint64
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}
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func (o *ForgetInodeOp) kernelResponse() (b buffer.Buffer) {
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func (o *ForgetInodeOp) kernelResponse() (b buffer.OutMessage) {
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// No response.
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return
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}
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@ -259,9 +259,9 @@ func (o *MkDirOp) ShortDesc() (desc string) {
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return
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}
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func (o *MkDirOp) kernelResponse() (b buffer.Buffer) {
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func (o *MkDirOp) kernelResponse() (b buffer.OutMessage) {
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size := fusekernel.EntryOutSize(o.protocol)
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b = buffer.New(size)
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b = buffer.NewOutMessage(size)
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out := (*fusekernel.EntryOut)(b.Grow(size))
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convertChildInodeEntry(&o.Entry, out)
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@ -311,9 +311,9 @@ func (o *CreateFileOp) ShortDesc() (desc string) {
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return
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}
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func (o *CreateFileOp) kernelResponse() (b buffer.Buffer) {
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func (o *CreateFileOp) kernelResponse() (b buffer.OutMessage) {
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eSize := fusekernel.EntryOutSize(o.protocol)
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b = buffer.New(eSize + unsafe.Sizeof(fusekernel.OpenOut{}))
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b = buffer.NewOutMessage(eSize + unsafe.Sizeof(fusekernel.OpenOut{}))
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e := (*fusekernel.EntryOut)(b.Grow(eSize))
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convertChildInodeEntry(&o.Entry, e)
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@ -357,9 +357,9 @@ func (o *CreateSymlinkOp) ShortDesc() (desc string) {
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return
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}
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func (o *CreateSymlinkOp) kernelResponse() (b buffer.Buffer) {
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func (o *CreateSymlinkOp) kernelResponse() (b buffer.OutMessage) {
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size := fusekernel.EntryOutSize(o.protocol)
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b = buffer.New(size)
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b = buffer.NewOutMessage(size)
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out := (*fusekernel.EntryOut)(b.Grow(size))
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convertChildInodeEntry(&o.Entry, out)
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@ -418,8 +418,8 @@ type RenameOp struct {
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NewName string
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}
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func (o *RenameOp) kernelResponse() (b buffer.Buffer) {
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b = buffer.New(0)
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func (o *RenameOp) kernelResponse() (b buffer.OutMessage) {
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b = buffer.NewOutMessage(0)
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return
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}
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@ -439,8 +439,8 @@ type RmDirOp struct {
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Name string
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}
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func (o *RmDirOp) kernelResponse() (b buffer.Buffer) {
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b = buffer.New(0)
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func (o *RmDirOp) kernelResponse() (b buffer.OutMessage) {
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b = buffer.NewOutMessage(0)
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return
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}
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@ -459,8 +459,8 @@ type UnlinkOp struct {
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Name string
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}
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func (o *UnlinkOp) kernelResponse() (b buffer.Buffer) {
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b = buffer.New(0)
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func (o *UnlinkOp) kernelResponse() (b buffer.OutMessage) {
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b = buffer.NewOutMessage(0)
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return
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}
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@ -491,8 +491,8 @@ type OpenDirOp struct {
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Handle HandleID
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}
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func (o *OpenDirOp) kernelResponse() (b buffer.Buffer) {
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b = buffer.New(unsafe.Sizeof(fusekernel.OpenOut{}))
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func (o *OpenDirOp) kernelResponse() (b buffer.OutMessage) {
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b = buffer.NewOutMessage(unsafe.Sizeof(fusekernel.OpenOut{}))
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out := (*fusekernel.OpenOut)(b.Grow(unsafe.Sizeof(fusekernel.OpenOut{})))
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out.Fh = uint64(o.Handle)
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@ -589,8 +589,8 @@ type ReadDirOp struct {
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Data []byte
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}
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func (o *ReadDirOp) kernelResponse() (b buffer.Buffer) {
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b = buffer.New(uintptr(len(o.Data)))
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func (o *ReadDirOp) kernelResponse() (b buffer.OutMessage) {
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b = buffer.NewOutMessage(uintptr(len(o.Data)))
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b.Append(o.Data)
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return
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}
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@ -612,8 +612,8 @@ type ReleaseDirHandleOp struct {
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Handle HandleID
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}
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func (o *ReleaseDirHandleOp) kernelResponse() (b buffer.Buffer) {
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b = buffer.New(0)
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func (o *ReleaseDirHandleOp) kernelResponse() (b buffer.OutMessage) {
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b = buffer.NewOutMessage(0)
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return
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}
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@ -643,8 +643,8 @@ type OpenFileOp struct {
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Handle HandleID
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}
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func (o *OpenFileOp) kernelResponse() (b buffer.Buffer) {
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b = buffer.New(unsafe.Sizeof(fusekernel.OpenOut{}))
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func (o *OpenFileOp) kernelResponse() (b buffer.OutMessage) {
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b = buffer.NewOutMessage(unsafe.Sizeof(fusekernel.OpenOut{}))
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out := (*fusekernel.OpenOut)(b.Grow(unsafe.Sizeof(fusekernel.OpenOut{})))
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out.Fh = uint64(o.Handle)
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@ -680,8 +680,8 @@ type ReadFileOp struct {
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Data []byte
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}
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func (o *ReadFileOp) kernelResponse() (b buffer.Buffer) {
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b = buffer.New(uintptr(len(o.Data)))
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func (o *ReadFileOp) kernelResponse() (b buffer.OutMessage) {
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b = buffer.NewOutMessage(uintptr(len(o.Data)))
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b.Append(o.Data)
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return
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}
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@ -756,8 +756,8 @@ type WriteFileOp struct {
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Data []byte
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}
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func (o *WriteFileOp) kernelResponse() (b buffer.Buffer) {
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b = buffer.New(unsafe.Sizeof(fusekernel.WriteOut{}))
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func (o *WriteFileOp) kernelResponse() (b buffer.OutMessage) {
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b = buffer.NewOutMessage(unsafe.Sizeof(fusekernel.WriteOut{}))
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out := (*fusekernel.WriteOut)(b.Grow(unsafe.Sizeof(fusekernel.WriteOut{})))
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out.Size = uint32(len(o.Data))
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@ -788,8 +788,8 @@ type SyncFileOp struct {
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Handle HandleID
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}
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func (o *SyncFileOp) kernelResponse() (b buffer.Buffer) {
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b = buffer.New(0)
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func (o *SyncFileOp) kernelResponse() (b buffer.OutMessage) {
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b = buffer.NewOutMessage(0)
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return
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}
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@ -848,8 +848,8 @@ type FlushFileOp struct {
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Handle HandleID
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}
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func (o *FlushFileOp) kernelResponse() (b buffer.Buffer) {
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b = buffer.New(0)
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func (o *FlushFileOp) kernelResponse() (b buffer.OutMessage) {
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b = buffer.NewOutMessage(0)
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return
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}
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@ -870,8 +870,8 @@ type ReleaseFileHandleOp struct {
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Handle HandleID
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}
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func (o *ReleaseFileHandleOp) kernelResponse() (b buffer.Buffer) {
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b = buffer.New(0)
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func (o *ReleaseFileHandleOp) kernelResponse() (b buffer.OutMessage) {
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b = buffer.NewOutMessage(0)
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return
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}
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@ -888,7 +888,7 @@ func (o *unknownOp) ShortDesc() (desc string) {
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return
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}
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func (o *unknownOp) kernelResponse() (b buffer.Buffer) {
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func (o *unknownOp) kernelResponse() (b buffer.OutMessage) {
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panic(fmt.Sprintf("Should never get here for unknown op: %s", o.ShortDesc()))
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}
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@ -907,8 +907,8 @@ type ReadSymlinkOp struct {
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Target string
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}
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func (o *ReadSymlinkOp) kernelResponse() (b buffer.Buffer) {
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b = buffer.New(uintptr(len(o.Target)))
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func (o *ReadSymlinkOp) kernelResponse() (b buffer.OutMessage) {
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b = buffer.NewOutMessage(uintptr(len(o.Target)))
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b.AppendString(o.Target)
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return
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}
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@ -929,8 +929,8 @@ type InternalStatFSOp struct {
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commonOp
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}
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func (o *InternalStatFSOp) kernelResponse() (b buffer.Buffer) {
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b = buffer.New(unsafe.Sizeof(fusekernel.StatfsOut{}))
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func (o *InternalStatFSOp) kernelResponse() (b buffer.OutMessage) {
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b = buffer.NewOutMessage(unsafe.Sizeof(fusekernel.StatfsOut{}))
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b.Grow(unsafe.Sizeof(fusekernel.StatfsOut{}))
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return
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@ -942,6 +942,6 @@ type InternalInterruptOp struct {
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FuseID uint64
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}
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func (o *InternalInterruptOp) kernelResponse() (b buffer.Buffer) {
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func (o *InternalInterruptOp) kernelResponse() (b buffer.OutMessage) {
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panic("Shouldn't get here.")
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}
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@ -21,25 +21,25 @@ import (
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"github.com/jacobsa/fuse/internal/fusekernel"
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)
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// Buffer provides a mechanism for constructing a single contiguous fuse
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// OutMessage provides a mechanism for constructing a single contiguous fuse
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// message from multiple segments, where the first segment is always a
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// fusekernel.OutHeader message.
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//
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// Must be created with New. Exception: the zero value has Bytes() == nil.
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type Buffer struct {
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type OutMessage struct {
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slice []byte
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}
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// Create a new buffer whose initial contents are a zeroed fusekernel.OutHeader
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// message, and with room enough to grow by extra bytes.
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func New(extra uintptr) (b Buffer) {
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func NewOutMessage(extra uintptr) (b OutMessage) {
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const headerSize = unsafe.Sizeof(fusekernel.OutHeader{})
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b.slice = make([]byte, headerSize, headerSize+extra)
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return
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}
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// Return a pointer to the header at the start of the buffer.
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func (b *Buffer) OutHeader() (h *fusekernel.OutHeader) {
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func (b *OutMessage) OutHeader() (h *fusekernel.OutHeader) {
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sh := (*reflect.SliceHeader)(unsafe.Pointer(&b.slice))
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h = (*fusekernel.OutHeader)(unsafe.Pointer(sh.Data))
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return
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@ -48,7 +48,7 @@ func (b *Buffer) OutHeader() (h *fusekernel.OutHeader) {
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// Grow the buffer by the supplied number of bytes, returning a pointer to the
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// start of the new segment. The sum of the arguments given to Grow must not
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// exceed the argument given to New when creating the buffer.
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func (b *Buffer) Grow(size uintptr) (p unsafe.Pointer) {
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func (b *OutMessage) Grow(size uintptr) (p unsafe.Pointer) {
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sh := (*reflect.SliceHeader)(unsafe.Pointer(&b.slice))
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p = unsafe.Pointer(sh.Data + uintptr(sh.Len))
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b.slice = b.slice[:len(b.slice)+int(size)]
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@ -56,7 +56,7 @@ func (b *Buffer) Grow(size uintptr) (p unsafe.Pointer) {
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}
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// Equivalent to growing by the length of p, then copying p into the new segment.
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func (b *Buffer) Append(p []byte) {
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func (b *OutMessage) Append(p []byte) {
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sh := reflect.SliceHeader{
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Data: uintptr(b.Grow(uintptr(len(p)))),
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Len: len(p),
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@ -67,7 +67,7 @@ func (b *Buffer) Append(p []byte) {
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}
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// Equivalent to growing by the length of s, then copying s into the new segment.
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func (b *Buffer) AppendString(s string) {
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func (b *OutMessage) AppendString(s string) {
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sh := reflect.SliceHeader{
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Data: uintptr(b.Grow(uintptr(len(s)))),
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Len: len(s),
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@ -78,6 +78,6 @@ func (b *Buffer) AppendString(s string) {
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}
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// Return a reference to the current contents of the buffer.
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func (b *Buffer) Bytes() []byte {
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func (b *OutMessage) Bytes() []byte {
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return b.slice
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}
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