Skip to content

J
jacobsa-fuse
Commit a7bcfed2 authored by Aaron Jacobs's avatar Aaron Jacobs
Browse files
Options

Refactored kernelResponse methods into a single big function.

parent 35d5c4c3
Hide whitespace changes
Inline Side-by-side
Showing with 121 additions and 347 deletions
ops.go
View file @ a7bcfed2
......@@ -15,7 +15,7 @@
package fuse
import (
"fmt"
"syscall"
"unsafe"
"github.com/jacobsa/fuse/fuseops"
......@@ -23,352 +23,126 @@ import (
"github.com/jacobsa/fuse/internal/fusekernel"
)
type opCommon struct {
}
////////////////////////////////////////////////////////////////////////
// Inodes
////////////////////////////////////////////////////////////////////////
type lookUpInodeOp struct {
opCommon
wrapped fuseops.LookUpInodeOp
}
func (o *lookUpInodeOp) kernelResponse(
protocol fusekernel.Protocol) (b buffer.OutMessage) {
size := fusekernel.EntryOutSize(protocol)
b = buffer.NewOutMessage(size)
out := (*fusekernel.EntryOut)(b.Grow(size))
convertChildInodeEntry(&o.wrapped.Entry, out)
return
}
type getInodeAttributesOp struct {
opCommon
wrapped fuseops.GetInodeAttributesOp
}
func (o *getInodeAttributesOp) kernelResponse() (b buffer.OutMessage) {
size := fusekernel.AttrOutSize(o.protocol)
b = buffer.NewOutMessage(size)
out := (*fusekernel.AttrOut)(b.Grow(size))
out.AttrValid, out.AttrValidNsec = convertExpirationTime(o.AttributesExpiration)
convertAttributes(o.Inode, &o.Attributes, &out.Attr)
return
}
type setInodeAttributesOp struct {
opCommon
wrapped fuseops.SetInodeAttributesOp
}
func (o *setInodeAttributesOp) kernelResponse() (b buffer.OutMessage) {
size := fusekernel.AttrOutSize(o.protocol)
b = buffer.NewOutMessage(size)
out := (*fusekernel.AttrOut)(b.Grow(size))
out.AttrValid, out.AttrValidNsec = convertExpirationTime(o.AttributesExpiration)
convertAttributes(o.Inode, &o.Attributes, &out.Attr)
return
}
type forgetInodeOp struct {
opCommon
wrapped fuseops.ForgetInodeOp
}
func (o *forgetInodeOp) kernelResponse() (b buffer.OutMessage) {
// No response.
return
}
////////////////////////////////////////////////////////////////////////
// Inode creation
////////////////////////////////////////////////////////////////////////
type mkDirOp struct {
opCommon
wrapped fuseops.MkDirOp
}
func (o *mkDirOp) kernelResponse() (b buffer.OutMessage) {
size := fusekernel.EntryOutSize(o.protocol)
b = buffer.NewOutMessage(size)
out := (*fusekernel.EntryOut)(b.Grow(size))
convertChildInodeEntry(&o.Entry, out)
return
}
type createFileOp struct {
opCommon
wrapped fuseops.CreateFileOp
}
func (o *createFileOp) kernelResponse() (b buffer.OutMessage) {
eSize := fusekernel.EntryOutSize(o.protocol)
b = buffer.NewOutMessage(eSize + unsafe.Sizeof(fusekernel.OpenOut{}))
e := (*fusekernel.EntryOut)(b.Grow(eSize))
convertChildInodeEntry(&o.Entry, e)
oo := (*fusekernel.OpenOut)(b.Grow(unsafe.Sizeof(fusekernel.OpenOut{})))
oo.Fh = uint64(o.Handle)
return
}
type createSymlinkOp struct {
opCommon
wrapped fuseops.CreateSymlinkOp
}
func (o *createSymlinkOp) kernelResponse() (b buffer.OutMessage) {
size := fusekernel.EntryOutSize(o.protocol)
b = buffer.NewOutMessage(size)
out := (*fusekernel.EntryOut)(b.Grow(size))
convertChildInodeEntry(&o.Entry, out)
return
}
////////////////////////////////////////////////////////////////////////
// Unlinking
////////////////////////////////////////////////////////////////////////
type renameOp struct {
opCommon
wrapped fuseops.RenameOp
}
func (o *renameOp) kernelResponse() (b buffer.OutMessage) {
b = buffer.NewOutMessage(0)
return
}
type rmDirOp struct {
opCommon
wrapped fuseops.RmDirOp
}
func (o *rmDirOp) kernelResponse() (b buffer.OutMessage) {
b = buffer.NewOutMessage(0)
return
}
type unlinkOp struct {
opCommon
wrapped fuseops.UnlinkOp
}
func (o *unlinkOp) kernelResponse() (b buffer.OutMessage) {
b = buffer.NewOutMessage(0)
return
}
////////////////////////////////////////////////////////////////////////
// Directory handles
////////////////////////////////////////////////////////////////////////
type openDirOp struct {
opCommon
wrapped fuseops.OpenDirOp
}
func (o *openDirOp) kernelResponse() (b buffer.OutMessage) {
b = buffer.NewOutMessage(unsafe.Sizeof(fusekernel.OpenOut{}))
out := (*fusekernel.OpenOut)(b.Grow(unsafe.Sizeof(fusekernel.OpenOut{})))
out.Fh = uint64(o.Handle)
return
}
type readDirOp struct {
opCommon
wrapped fuseops.ReadDirOp
}
func (o *readDirOp) kernelResponse() (b buffer.OutMessage) {
b = buffer.NewOutMessage(uintptr(len(o.Data)))
b.Append(o.Data)
return
}
type releaseDirHandleOp struct {
opCommon
wrapped fuseops.ReleaseDirHandleOp
}
func (o *releaseDirHandleOp) kernelResponse() (b buffer.OutMessage) {
b = buffer.NewOutMessage(0)
return
}
////////////////////////////////////////////////////////////////////////
// File handles
////////////////////////////////////////////////////////////////////////
type openFileOp struct {
opCommon
wrapped fuseops.OpenFileOp
}
func (o *openFileOp) kernelResponse() (b buffer.OutMessage) {
b = buffer.NewOutMessage(unsafe.Sizeof(fusekernel.OpenOut{}))
out := (*fusekernel.OpenOut)(b.Grow(unsafe.Sizeof(fusekernel.OpenOut{})))
out.Fh = uint64(o.Handle)
return
}
type readFileOp struct {
opCommon
wrapped fuseops.ReadFileOp
}
func (o *readFileOp) kernelResponse() (b buffer.OutMessage) {
b = buffer.NewOutMessage(uintptr(len(o.Data)))
b.Append(o.Data)
return
}
type writeFileOp struct {
opCommon
wrapped fuseops.WriteFileOp
}
func (o *writeFileOp) kernelResponse() (b buffer.OutMessage) {
b = buffer.NewOutMessage(unsafe.Sizeof(fusekernel.WriteOut{}))
out := (*fusekernel.WriteOut)(b.Grow(unsafe.Sizeof(fusekernel.WriteOut{})))
out.Size = uint32(len(o.Data))
return
}
type syncFileOp struct {
opCommon
wrapped fuseops.SyncFileOp
}
func (o *syncFileOp) kernelResponse() (b buffer.OutMessage) {
b = buffer.NewOutMessage(0)
return
}
type flushFileOp struct {
opCommon
wrapped fuseops.FlushFileOp
}
func (o *flushFileOp) kernelResponse() (b buffer.OutMessage) {
b = buffer.NewOutMessage(0)
return
}
type releaseFileHandleOp struct {
opCommon
wrapped fuseops.ReleaseFileHandleOp
}
func (o *releaseFileHandleOp) kernelResponse() (b buffer.OutMessage) {
b = buffer.NewOutMessage(0)
return
}
// A sentinel used for unknown ops. The user is expected to respond with a
// non-nil error.
type unknownOp struct {
opCommon
opCode uint32
inode fuseops.InodeID
}
func (o *unknownOp) ShortDesc() string {
return fmt.Sprintf("<opcode %d>(inode=%d)", o.opCode, o.inode)
}
func (o *unknownOp) DebugString() string {
return o.ShortDesc()
}
func (o *unknownOp) kernelResponse() (b buffer.OutMessage) {
panic(fmt.Sprintf(
"Expected an error response for unknown op: %s",
o.ShortDesc()))
}
////////////////////////////////////////////////////////////////////////
// Reading symlinks
////////////////////////////////////////////////////////////////////////
type readSymlinkOp struct {
opCommon
wrapped fuseops.ReadSymlinkOp
}
func (o *readSymlinkOp) kernelResponse() (b buffer.OutMessage) {
b = buffer.NewOutMessage(uintptr(len(o.Target)))
b.AppendString(o.Target)
return
}
////////////////////////////////////////////////////////////////////////
// Internal
////////////////////////////////////////////////////////////////////////
// Common implementation for our "internal" ops that don't need to be pretty.
type internalOp struct {
opCommon
}
func (o *internalOp) ShortDesc() string { return "<internalOp>" }
func (o *internalOp) DebugString() string { return "<internalOp>" }
type internalStatFSOp struct {
internalOp
}
func (o *internalStatFSOp) kernelResponse() (b buffer.OutMessage) {
b = buffer.NewOutMessage(unsafe.Sizeof(fusekernel.StatfsOut{}))
b.Grow(unsafe.Sizeof(fusekernel.StatfsOut{}))
return
}
type internalInterruptOp struct {
internalOp
FuseID uint64
}
func (o *internalInterruptOp) kernelResponse() (b buffer.OutMessage) {
panic("Shouldn't get here.")
}
type internalInitOp struct {
internalOp
// In
Kernel fusekernel.Protocol
// Out
Library fusekernel.Protocol
MaxReadahead uint32
Flags fusekernel.InitFlags
MaxWrite uint32
}
func (o *internalInitOp) kernelResponse() (b buffer.OutMessage) {
b = buffer.NewOutMessage(unsafe.Sizeof(fusekernel.InitOut{}))
out := (*fusekernel.InitOut)(b.Grow(unsafe.Sizeof(fusekernel.InitOut{})))
out.Major = o.Library.Major
out.Minor = o.Library.Minor
out.MaxReadahead = o.MaxReadahead
out.Flags = uint32(o.Flags)
out.MaxWrite = o.MaxWrite
// Given an op, return the response that should be sent to the kernel. If the
// op requires no response, return a nil response. If the op is unknown, return
// an error that should be sent to the kernel.
func kernelResponse(
untyped fuseops.Op,
protocol fusekernel.Protocol) (b buffer.OutMessage, err error) {
switch o := untyped.(type) {
case *fuseops.LookUpInodeOp:
size := fusekernel.EntryOutSize(protocol)
b = buffer.NewOutMessage(size)
out := (*fusekernel.EntryOut)(b.Grow(size))
convertChildInodeEntry(&o.wrapped.Entry, out)
case *fuseops.GetInodeAttributesOp:
size := fusekernel.AttrOutSize(o.protocol)
b = buffer.NewOutMessage(size)
out := (*fusekernel.AttrOut)(b.Grow(size))
out.AttrValid, out.AttrValidNsec = convertExpirationTime(o.AttributesExpiration)
convertAttributes(o.Inode, &o.Attributes, &out.Attr)
case *fuseops.SetInodeAttributesOp:
size := fusekernel.AttrOutSize(o.protocol)
b = buffer.NewOutMessage(size)
out := (*fusekernel.AttrOut)(b.Grow(size))
out.AttrValid, out.AttrValidNsec = convertExpirationTime(o.AttributesExpiration)
convertAttributes(o.Inode, &o.Attributes, &out.Attr)
case *fuseops.ForgetInodeOp:
// No response.
case *fuseops.MkDirOp:
size := fusekernel.EntryOutSize(o.protocol)
b = buffer.NewOutMessage(size)
out := (*fusekernel.EntryOut)(b.Grow(size))
convertChildInodeEntry(&o.Entry, out)
case *fuseops.CreateFileOp:
eSize := fusekernel.EntryOutSize(o.protocol)
b = buffer.NewOutMessage(eSize + unsafe.Sizeof(fusekernel.OpenOut{}))
e := (*fusekernel.EntryOut)(b.Grow(eSize))
convertChildInodeEntry(&o.Entry, e)
oo := (*fusekernel.OpenOut)(b.Grow(unsafe.Sizeof(fusekernel.OpenOut{})))
oo.Fh = uint64(o.Handle)
case *fuseops.CreateSymlinkOp:
size := fusekernel.EntryOutSize(o.protocol)
b = buffer.NewOutMessage(size)
out := (*fusekernel.EntryOut)(b.Grow(size))
convertChildInodeEntry(&o.Entry, out)
case *fuseops.RenameOp:
b = buffer.NewOutMessage(0)
case *fuseops.RmDirOp:
b = buffer.NewOutMessage(0)
case *fuseops.UnlinkOp:
b = buffer.NewOutMessage(0)
case *fuseops.OpenDirOp:
b = buffer.NewOutMessage(unsafe.Sizeof(fusekernel.OpenOut{}))
out := (*fusekernel.OpenOut)(b.Grow(unsafe.Sizeof(fusekernel.OpenOut{})))
out.Fh = uint64(o.Handle)
case *fuseops.ReadDirOp:
b = buffer.NewOutMessage(uintptr(len(o.Data)))
b.Append(o.Data)
case *fuseops.ReleaseDirHandleOp:
b = buffer.NewOutMessage(0)
case *fuseops.OpenFileOp:
b = buffer.NewOutMessage(unsafe.Sizeof(fusekernel.OpenOut{}))
out := (*fusekernel.OpenOut)(b.Grow(unsafe.Sizeof(fusekernel.OpenOut{})))
out.Fh = uint64(o.Handle)
case *fuseops.ReadFileOp:
b = buffer.NewOutMessage(uintptr(len(o.Data)))
b.Append(o.Data)
case *fuseops.WriteFileOp:
b = buffer.NewOutMessage(unsafe.Sizeof(fusekernel.WriteOut{}))
out := (*fusekernel.WriteOut)(b.Grow(unsafe.Sizeof(fusekernel.WriteOut{})))
out.Size = uint32(len(o.Data))
case *fuseops.SyncFileOp:
b = buffer.NewOutMessage(0)
case *fuseops.FlushFileOp:
b = buffer.NewOutMessage(0)
case *fuseops.ReleaseFileHandleOp:
b = buffer.NewOutMessage(0)
case *fuseops.ReadSymlinkOp:
b = buffer.NewOutMessage(uintptr(len(o.Target)))
b.AppendString(o.Target)
case *internalStatFSOp:
b = buffer.NewOutMessage(unsafe.Sizeof(fusekernel.StatfsOut{}))
b.Grow(unsafe.Sizeof(fusekernel.StatfsOut{}))
case *internalInterruptOp:
// No response.
case *internalInitOp:
b = buffer.NewOutMessage(unsafe.Sizeof(fusekernel.InitOut{}))
out := (*fusekernel.InitOut)(b.Grow(unsafe.Sizeof(fusekernel.InitOut{})))
out.Major = o.Library.Major
out.Minor = o.Library.Minor
out.MaxReadahead = o.MaxReadahead
out.Flags = uint32(o.Flags)
out.MaxWrite = o.MaxWrite
default:
err = syscall.ENOSYS
}
return
}
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment
GitLab Nexedi Edition | About GitLab | About Nexedi | 沪ICP备2021021310号-2 | 沪ICP备2021021310号-7