Tom Talpey <tom@xxxxxxxxxx> wrote:
> That's a really large SMBDirect Send operation, it looks like it's
> trying to send the entire write in one message and it overflows
> the receive buffer.
>
> I'm still fighting with wireshark and can't decode the layers
> above TCP. Can you look at the SMBDirect negotiation at the
> start of the trace, and tell me what the max send/receive
> values were set by each side?
Frame 8: 110 bytes on wire (880 bits), 110 bytes captured (880 bits) on interface enp2s0, id 0
Ethernet II, Src: IntelCor_bb:e6:30 (00:1b:21:bb:e6:30), Dst: IntelCor_bb:e6:ac (00:1b:21:bb:e6:ac)
Internet Protocol Version 4, Src: 192.168.6.2, Dst: 192.168.6.1
Transmission Control Protocol, Src Port: 50018, Dst Port: 5445, Seq: 33, Ack: 33, Len: 44
iWARP Marker Protocol data unit Aligned framing
iWARP Direct Data Placement and Remote Direct Memory Access Protocol
SMB-Direct (SMB RDMA Transport)
NegotiateRequest
MinVersion: 0x0100
MaxVersion: 0x0100
CreditsRequested: 255
PreferredSendSize: 1364
MaxReceiveSize: 1364
MaxFragmentedSize: 1048576
Frame 9: 122 bytes on wire (976 bits), 122 bytes captured (976 bits) on interface enp2s0, id 0
Ethernet II, Src: IntelCor_bb:e6:ac (00:1b:21:bb:e6:ac), Dst: IntelCor_bb:e6:30 (00:1b:21:bb:e6:30)
Internet Protocol Version 4, Src: 192.168.6.1, Dst: 192.168.6.2
Transmission Control Protocol, Src Port: 5445, Dst Port: 50018, Seq: 33, Ack: 77, Len: 56
iWARP Marker Protocol data unit Aligned framing
iWARP Direct Data Placement and Remote Direct Memory Access Protocol
SMB-Direct (SMB RDMA Transport)
NegotiateResponse
MinVersion: 0x0100
MaxVersion: 0x0100
NegotiatedVersion: 0x0100
CreditsRequested: 255
CreditsGranted: 254
Status: STATUS_SUCCESS (0x00000000)
MaxReadWriteSize: 524224
PreferredSendSize: 1364
MaxReceiveSize: 1364
MaxFragmentedSize: 173910
Frame 10: 110 bytes on wire (880 bits), 110 bytes captured (880 bits) on interface enp2s0, id 0
Ethernet II, Src: IntelCor_bb:e6:30 (00:1b:21:bb:e6:30), Dst: IntelCor_bb:e6:ac (00:1b:21:bb:e6:ac)
Internet Protocol Version 4, Src: 192.168.6.2, Dst: 192.168.6.1
Transmission Control Protocol, Src Port: 50018, Dst Port: 5445, Seq: 77, Ack: 89, Len: 44
iWARP Marker Protocol data unit Aligned framing
iWARP Direct Data Placement and Remote Direct Memory Access Protocol
SMB-Direct (SMB RDMA Transport)
DataMessage
CreditsRequested: 255
CreditsGranted: 255
Flags: 0x0000
.... .... .... ...0 = ResponseRequested: False
RemainingLength: 0
DataOffset: 0
DataLength: 0
Frame 11: 346 bytes on wire (2768 bits), 346 bytes captured (2768 bits) on interface enp2s0, id 0
Ethernet II, Src: IntelCor_bb:e6:30 (00:1b:21:bb:e6:30), Dst: IntelCor_bb:e6:ac (00:1b:21:bb:e6:ac)
Internet Protocol Version 4, Src: 192.168.6.2, Dst: 192.168.6.1
Transmission Control Protocol, Src Port: 50018, Dst Port: 5445, Seq: 121, Ack: 89, Len: 280
iWARP Marker Protocol data unit Aligned framing
iWARP Direct Data Placement and Remote Direct Memory Access Protocol
SMB-Direct (SMB RDMA Transport)
DataMessage
CreditsRequested: 255
CreditsGranted: 0
Flags: 0x0000
.... .... .... ...0 = ResponseRequested: False
RemainingLength: 0
DataOffset: 24
DataLength: 232
SMB2 (Server Message Block Protocol version 2)
SMB2 Header
ProtocolId: 0xfe534d42
Header Length: 64
Credit Charge: 0
Channel Sequence: 0
Reserved: 0000
Command: Negotiate Protocol (0)
Credits requested: 10
Flags: 0x00000000
Chain Offset: 0x00000000
Message ID: 0
Process Id: 0x000013c5
Tree Id: 0x00000000
Session Id: 0x0000000000000000
Signature: 00000000000000000000000000000000
[Response in: 13]
Negotiate Protocol Request (0x00)
[Preauth Hash: 81cd52dea94ed363a171b7effe222c0003574f5c54f6c7a1cbb041676ea9ddf15245b2a4…]
StructureSize: 0x0024
Dialect count: 4
Security mode: 0x01, Signing enabled
Reserved: 0000
Capabilities: 0x00000077, DFS, LEASING, LARGE MTU, PERSISTENT HANDLES, DIRECTORY LEASING, ENCRYPTION
Client Guid: c494649a-e636-d94c-a55e-be00d5a02a30
NegotiateContextOffset: 0x00000070
NegotiateContextCount: 4
Reserved: 0000
Dialect: SMB 2.1 (0x0210)
Dialect: SMB 3.0 (0x0300)
Dialect: SMB 3.0.2 (0x0302)
Dialect: SMB 3.1.1 (0x0311)
Negotiate Context: SMB2_PREAUTH_INTEGRITY_CAPABILITIES
Type: SMB2_PREAUTH_INTEGRITY_CAPABILITIES (0x0001)
DataLength: 38
Reserved: 00000000
HashAlgorithmCount: 1
SaltLength: 32
HashAlgorithm: SHA-512 (0x0001)
Salt: 1d6e14b44264b6cc1db622478c3826c4cd09df1dc70abf73f13b9261724d4181
Negotiate Context: SMB2_ENCRYPTION_CAPABILITIES
Type: SMB2_ENCRYPTION_CAPABILITIES (0x0002)
DataLength: 8
Reserved: 00000000
CipherCount: 3
CipherId: AES-128-GCM (0x0002)
CipherId: AES-256-GCM (0x0004)
CipherId: AES-128-CCM (0x0001)
Negotiate Context: SMB2_NETNAME_NEGOTIATE_CONTEXT_ID
Type: SMB2_NETNAME_NEGOTIATE_CONTEXT_ID (0x0005)
DataLength: 22
Reserved: 00000000
Netname: 192.168.6.1
Negotiate Context: SMB2_POSIX_EXTENSIONS_CAPABILITIES
Type: SMB2_POSIX_EXTENSIONS_CAPABILITIES (0x0100)
DataLength: 16
Reserved: 00000000
POSIX Reserved: 93ad25509cb411e7b42383de968bcd7c
