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fix: remove legacy rdma header descriptors

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These headers are not used by the cuda cuObject client/server
interactions, so are not needed in this server implementation.
This commit is contained in:
Ben McClelland
2026-09-20 12:15:43 -07:00
parent d03ac3c299
commit 9c98084309
7 changed files with 34 additions and 120 deletions
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build/vgwrdma-builder/Dockerfile
+1 -1
View File
@@ -1,6 +1,6 @@
# syntax=docker/dockerfile:1.7
ARG CUDA_TAG=13.3.0-devel-rockylinux9
ARG CUDA_TAG=13.4.1-devel-rockylinux9
FROM --platform=linux/amd64 nvidia/cuda:${CUDA_TAG}
# Install build prerequisites and cuObject server development packages.
cubackend/cuserver.go
+1 -3
View File
@@ -121,9 +121,7 @@ func (cs *CuServer) PutObject(ctx context.Context, po s3response.PutObjectInput)
// RDMA-accelerated path
size, ok := cumiddleware.GetRDMASize(ctx)
if !ok || size <= 0 {
// Size comes from the legacy 3-header scheme or, for the combined
// token scheme, the standard Content-Length header — neither was usable.
return s3response.PutObjectOutput{}, fmt.Errorf("cuserver: RDMA PUT requires a positive size via the %s header or a standard Content-Length header", cumiddleware.HeaderRDMASize)
return s3response.PutObjectOutput{}, fmt.Errorf("cuserver: RDMA PUT requires a positive Content-Length or RDMA token buffer size")
}
if size > int64(rdma.MaxTransferSize) {
return s3response.PutObjectOutput{}, fmt.Errorf("cuserver: object size %d exceeds RDMA max %d", size, rdma.MaxTransferSize)
cumiddleware/cuobj.go
+7 -43
View File
@@ -47,21 +47,11 @@ const (
)
// Header names used by the cuObject client to pass RDMA descriptor info.
//
// HeaderRDMADescr/HeaderRDMASize/HeaderRDMARemoteAddr are a legacy 3-header
// scheme used only by this repo's own test tools (cmd/cuobjtest,
// cmd/rdmatest). The real cuObject/minio-cpp SDK does not send these; it
// sends a single combined HeaderRDMAToken instead. Both schemes are
// supported so existing test tooling keeps working.
const (
HeaderRDMADescr = "X-CuObj-RDMA-Descr"
HeaderRDMASize = "X-CuObj-Content-Length"
HeaderRDMARemoteAddr = "X-CuObj-Remote-Buf-Start"
// HeaderRDMAToken is the single combined header sent by the real
// cuObject client SDK (e.g. minio-cpp). Its value is a colon-delimited
// token per the cuObj RDMA descriptor protocol. The whole token is
// passed through verbatim to the RDMA backend as the descriptor.
// cuObject client. Its value is a colon-delimited token per the
// cuObj RDMA descriptor protocol. The whole token is passed through
// verbatim to the RDMA backend as the descriptor.
//
// This is the canonical definition of the wire format; the encoder in
// cuwrapper/rdma_host_client_wrapper.cpp (build_token) must stay in
@@ -99,16 +89,15 @@ const (
// the fasthttp request context so the backend can retrieve them via the
// GetRDMA* helper functions.
//
// If neither the legacy descriptor header nor the combined RDMA token
// header is present, the request passes through unchanged — the backend
// If the combined RDMA token header is not present, the request passes
// through unchanged — the backend
// will use the normal (non-RDMA) code path.
//
// If a descriptor is present but required fields are malformed, a 400 Bad
// Request is returned immediately.
func CuObjMiddleware(ctx fiber.Ctx) error {
descr := ctx.Get(HeaderRDMADescr)
token := ctx.Get(HeaderRDMAToken)
if descr == "" && token == "" {
if token == "" {
return ctx.Next()
}
@@ -116,32 +105,7 @@ func CuObjMiddleware(ctx fiber.Ctx) error {
// the ctx.RequestCtx() call the versitygw controller uses to invoke the backend.
rctx := ctx.RequestCtx()
if descr != "" {
// Legacy 3-header scheme.
rctx.SetUserValue(localKeyRDMADescr, descr)
if sizeStr := ctx.Get(HeaderRDMASize); sizeStr != "" {
size, err := strconv.ParseInt(sizeStr, 10, 64)
if err != nil || size <= 0 {
return fiber.NewError(fiber.StatusBadRequest,
HeaderRDMASize+": must be a positive integer")
}
rctx.SetUserValue(localKeyRDMASize, size)
}
if addrStr := ctx.Get(HeaderRDMARemoteAddr); addrStr != "" {
addr, err := strconv.ParseUint(addrStr, 10, 64)
if err != nil {
return fiber.NewError(fiber.StatusBadRequest,
HeaderRDMARemoteAddr+": must be a non-negative integer")
}
rctx.SetUserValue(localKeyRDMARemoteStart, addr)
}
return ctx.Next()
}
// Combined token scheme (real cuObject client SDK). The descriptor
// The descriptor
// passed to the RDMA backend is the raw token string; the remote base
// address is parsed from the token's first field, and the transfer size
// normally comes from the standard Content-Length header (RDMA replaces
cumiddleware/cuobj_test.go
-42
View File
@@ -73,30 +73,6 @@ func TestCuObjMiddlewareNoHeadersPassesThrough(t *testing.T) {
assert.Equal(t, http.StatusOK, resp.StatusCode)
}
func TestCuObjMiddlewareLegacyHeaders(t *testing.T) {
app := fiber.New()
app.Use("*", CuObjMiddleware)
app.Post("/", func(ctx fiber.Ctx) error {
rctx := ctx.RequestCtx()
descr, ok := GetRDMADescriptor(rctx)
assert.True(t, ok)
assert.Equal(t, "deadbeef", descr)
size, ok := GetRDMASize(rctx)
assert.True(t, ok)
assert.Equal(t, int64(4096), size)
assert.Equal(t, uint64(4660), GetRDMARemoteStart(rctx))
return ctx.SendStatus(http.StatusOK)
})
req := httptest.NewRequest(http.MethodPost, "/", nil)
req.Header.Set(HeaderRDMADescr, "deadbeef")
req.Header.Set(HeaderRDMASize, "4096")
req.Header.Set(HeaderRDMARemoteAddr, "4660")
resp, err := app.Test(req)
assert.NoError(t, err)
assert.Equal(t, http.StatusOK, resp.StatusCode)
}
func TestCuObjMiddlewareTokenWithContentLength(t *testing.T) {
app := fiber.New()
app.Use("*", CuObjMiddleware)
@@ -272,21 +248,3 @@ func TestRCTokenScheme16HexNoColonStill400(t *testing.T) {
assert.NoError(t, err)
assert.Equal(t, http.StatusBadRequest, resp.StatusCode)
}
func TestLegacyDescriptorTakesPrecedenceOverRCToken(t *testing.T) {
// When both the legacy descriptor header and an RC-shaped combined
// token are present, the legacy path handles the request and the RC
// gate must not fire.
app, reached := newTestApp(t)
req := httptest.NewRequest(http.MethodPost, "/", nil)
req.Header.Set(HeaderRDMADescr, "legacy-descriptor")
req.Header.Set(HeaderRDMAToken, rcToken(""))
resp, err := app.Test(req)
assert.NoError(t, err)
assert.Equal(t, http.StatusOK, resp.StatusCode)
select {
case <-reached:
default:
t.Fatal("handler should have been reached via the legacy path")
}
}
cuobjclient/session_host_linux.go
+10 -12
View File
@@ -43,11 +43,10 @@ import (
// Session owns a host buffer registered for cuObject RDMA transfers via the
// host-memory RDMA client. Session methods are not safe for concurrent use.
type Session struct {
client *hostclient.Client
buf []byte
token string
size int
remoteStart uint64
client *hostclient.Client
buf []byte
token string
size int
}
// NewSession creates a host-memory RDMA session for a fixed transfer size.
@@ -81,11 +80,10 @@ func NewSession(size int) (*Session, error) {
}
return &Session{
client: client,
buf: buf,
token: token,
size: size,
remoteStart: client.BufferAddr(),
client: client,
buf: buf,
token: token,
size: size,
}, nil
}
@@ -107,7 +105,7 @@ func (s *Session) Upload(base *s3lib.Client, bucket, key string, src []byte) err
return fmt.Errorf("upload size mismatch: got %d bytes, want %d", len(src), s.size)
}
copy(s.buf, src)
return doPut(base, bucket, key, int64(s.size), s.token, s.remoteStart)
return doPut(base, bucket, key, int64(s.size), s.token)
}
// Download performs a GET; the gateway RDMA-writes into the registered host
@@ -119,7 +117,7 @@ func (s *Session) Download(base *s3lib.Client, bucket, key string, dst []byte) e
for i := range s.buf {
s.buf[i] = 0
}
if err := doGet(base, bucket, key, int64(s.size), s.token, s.remoteStart); err != nil {
if err := doGet(base, bucket, key, int64(s.size), s.token); err != nil {
return err
}
copy(dst, s.buf)
cuobjclient/session_linux.go
+6 -8
View File
@@ -38,10 +38,9 @@ const (
// Session owns a CUDA buffer registered for cuObject RDMA token exchange.
type Session struct {
ctx *C.cuobj_client_ctx_t
gpuBuf unsafe.Pointer
size int
remoteStart uint64
ctx *C.cuobj_client_ctx_t
gpuBuf unsafe.Pointer
size int
}
// NewSession creates a GPU-backed cuObject session for a fixed transfer size.
@@ -82,7 +81,6 @@ func NewSession(size int) (*Session, error) {
return nil, err
}
s.remoteStart = uint64(C.cuobj_client_ptr_to_u64(s.gpuBuf))
return s, nil
}
@@ -102,7 +100,7 @@ func (s *Session) Close() {
}
// Upload copies src into the session GPU buffer and performs a PUT operation
// using cuObject RDMA headers.
// using a cuObject RDMA token.
// src length must exactly match the size passed to NewSession.
func (s *Session) Upload(base *s3lib.Client, bucket, key string, src []byte) error {
if len(src) != s.size {
@@ -116,7 +114,7 @@ func (s *Session) Upload(base *s3lib.Client, bucket, key string, src []byte) err
return err
}
defer s.putToken(token)
return doPut(base, bucket, key, int64(s.size), C.GoString(token), s.remoteStart)
return doPut(base, bucket, key, int64(s.size), C.GoString(token))
}
// Download performs a GET operation into the session GPU buffer and copies the
@@ -134,7 +132,7 @@ func (s *Session) Download(base *s3lib.Client, bucket, key string, dst []byte) e
return err
}
defer s.putToken(token)
if err := doGet(base, bucket, key, int64(s.size), C.GoString(token), s.remoteStart); err != nil {
if err := doGet(base, bucket, key, int64(s.size), C.GoString(token)); err != nil {
return err
}
return s.copyD2H(dst)
cuobjclient/transport.go
+9 -11
View File
@@ -16,7 +16,7 @@
// This file holds the S3 request plumbing shared by the GPU (session_linux.go)
// and host-memory (session_host_linux.go) session implementations: both issue
// a zero-byte PUT/GET carrying the cuObject RDMA descriptor headers, and let
// a zero-byte PUT/GET carrying the cuObject RDMA token header, and let
// the gateway perform the actual transfer via RDMA.
package cuobjclient
@@ -37,10 +37,10 @@ import (
"github.com/versity/versitygw/cumiddleware"
)
func doPut(base *s3lib.Client, bucket, key string, size int64, descr string, remoteStart uint64) error {
func doPut(base *s3lib.Client, bucket, key string, size int64, token string) error {
var replyStatus string
var transferredHeader string
c := withRDMAHeaders(base, descr, size, remoteStart, &replyStatus, &transferredHeader)
c := withRDMAHeaders(base, token, &replyStatus, &transferredHeader)
_, err := c.PutObject(context.Background(), &s3lib.PutObjectInput{
Bucket: aws.String(bucket),
Key: aws.String(key),
@@ -73,10 +73,10 @@ func doPut(base *s3lib.Client, bucket, key string, size int64, descr string, rem
return nil
}
func doGet(base *s3lib.Client, bucket, key string, size int64, descr string, remoteStart uint64) error {
func doGet(base *s3lib.Client, bucket, key string, size int64, token string) error {
var replyStatus string
var transferredHeader string
c := withRDMAHeaders(base, descr, size, remoteStart, &replyStatus, &transferredHeader)
c := withRDMAHeaders(base, token, &replyStatus, &transferredHeader)
out, err := c.GetObject(context.Background(), &s3lib.GetObjectInput{
Bucket: aws.String(bucket),
Key: aws.String(key),
@@ -114,8 +114,8 @@ func doGet(base *s3lib.Client, bucket, key string, size int64, descr string, rem
return err
}
// withRDMAHeaders returns a client that adds the legacy RDMA descriptor,
// size, and remote-address headers to every request. The headers are added
// withRDMAHeaders returns a client that adds the RDMA token header to every
// request. The header is added
// via a Build-step middleware — which runs before the Finalize step that
// signs the request — so SigV4 covers them in SignedHeaders; an
// intermediary can no longer alter the RDMA controls without invalidating
@@ -125,7 +125,7 @@ func doGet(base *s3lib.Client, bucket, key string, size int64, descr string, rem
// otherwise checksum the empty HTTP body instead of the actual RDMA payload.
// If replyStatus/transferred are non-nil, they are set to the response
// HeaderRDMAReply and HeaderRDMABytesTransferred values (empty if absent).
func withRDMAHeaders(base *s3lib.Client, descr string, size int64, remoteStart uint64, replyStatus, transferred *string) *s3lib.Client {
func withRDMAHeaders(base *s3lib.Client, token string, replyStatus, transferred *string) *s3lib.Client {
opts := base.Options()
opts.RequestChecksumCalculation = aws.RequestChecksumCalculationWhenRequired
opts.ResponseChecksumValidation = aws.ResponseChecksumValidationWhenRequired
@@ -134,9 +134,7 @@ func withRDMAHeaders(base *s3lib.Client, descr string, size int64, remoteStart u
func(ctx context.Context, in smithymiddleware.BuildInput, next smithymiddleware.BuildHandler) (
smithymiddleware.BuildOutput, smithymiddleware.Metadata, error) {
if req, ok := in.Request.(*smithyhttp.Request); ok {
req.Header.Set(cumiddleware.HeaderRDMADescr, descr)
req.Header.Set(cumiddleware.HeaderRDMASize, strconv.FormatInt(size, 10))
req.Header.Set(cumiddleware.HeaderRDMARemoteAddr, strconv.FormatUint(remoteStart, 10))
req.Header.Set(cumiddleware.HeaderRDMAToken, token)
}
return next.HandleBuild(ctx, in)
}), smithymiddleware.Before); err != nil {