2090 lines
78 KiB
C
2090 lines
78 KiB
C
/* packet-rpcordma.c
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* Routines for RPC over RDMA dissection (RFC 5666)
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* Copyright 2014-2015, Mellanox Technologies Ltd.
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* Code by Yan Burman.
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "config.h"
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#include <stdlib.h>
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#include <epan/packet.h>
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#include <epan/prefs.h>
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#include <epan/exceptions.h>
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#include <epan/proto_data.h>
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#include <epan/reassemble.h>
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#include <epan/conversation.h>
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#include <epan/addr_resolv.h>
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#include "packet-rpcrdma.h"
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#include "packet-frame.h"
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#include "packet-infiniband.h"
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#include "packet-iwarp-ddp-rdmap.h"
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#define MIN_RPCRDMA_HDR_SZ 16
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#define MIN_RPCRDMA_MSG_SZ (MIN_RPCRDMA_HDR_SZ + 12)
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#define MIN_RPCRDMA_MSGP_SZ (MIN_RPCRDMA_MSG_SZ + 8)
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#define SID_ULP_MASK 0x00000000FF000000
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#define SID_PROTO_MASK 0x0000000000FF0000
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#define SID_PORT_MASK 0x000000000000FFFF
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#define SID_ULP 0x01
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#define SID_PROTO_TCP 0x06
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#define TCP_PORT_RPCRDMA_RANGE "20049,2050"
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#define SID_MASK (SID_ULP_MASK | SID_PROTO_MASK)
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#define SID_ULP_TCP ((SID_ULP << 3 * 8) | (SID_PROTO_TCP << 2 * 8))
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void proto_reg_handoff_rpcordma(void);
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void proto_register_rpcordma(void);
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static int proto_rpcordma = -1;
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static dissector_handle_t rpc_handler;
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/* RPCoRDMA Header */
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static int hf_rpcordma_xid = -1;
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static int hf_rpcordma_vers = -1;
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static int hf_rpcordma_flow_control = -1;
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static int hf_rpcordma_message_type = -1;
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/* chunks */
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static int hf_rpcordma_reads_count = -1;
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static int hf_rpcordma_writes_count = -1;
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static int hf_rpcordma_reply_count = -1;
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static int hf_rpcordma_position = -1;
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static int hf_rpcordma_segment_count = -1;
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/* rdma_segment */
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static int hf_rpcordma_rdma_handle = -1;
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static int hf_rpcordma_rdma_length = -1;
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static int hf_rpcordma_rdma_offset = -1;
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static int hf_rpcordma_rdma_align = -1;
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static int hf_rpcordma_rdma_thresh = -1;
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static int hf_rpcordma_errcode = -1;
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static int hf_rpcordma_vers_high = -1;
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static int hf_rpcordma_vers_low = -1;
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/* Initialize the subtree pointers */
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static gint ett_rpcordma = -1;
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static gint ett_rpcordma_chunk = -1;
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static gint ett_rpcordma_read_list = -1;
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static gint ett_rpcordma_read_chunk = -1;
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static gint ett_rpcordma_write_list = -1;
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static gint ett_rpcordma_write_chunk = -1;
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static gint ett_rpcordma_reply_chunk = -1;
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static gint ett_rpcordma_segment = -1;
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/* Fragmentation */
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static int hf_rpcordma_fragments = -1;
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static int hf_rpcordma_fragment = -1;
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static int hf_rpcordma_fragment_overlap = -1;
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static int hf_rpcordma_fragment_overlap_conflicts = -1;
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static int hf_rpcordma_fragment_multiple_tails = -1;
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static int hf_rpcordma_fragment_too_long_fragment = -1;
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static int hf_rpcordma_fragment_error = -1;
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static int hf_rpcordma_fragment_count = -1;
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static int hf_rpcordma_reassembled_in = -1;
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static int hf_rpcordma_reassembled_length = -1;
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static int hf_rpcordma_reassembled_data = -1;
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static gint ett_rpcordma_fragment = -1;
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static gint ett_rpcordma_fragments = -1;
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static const fragment_items rpcordma_frag_items = {
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/* Fragment subtrees */
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&ett_rpcordma_fragment,
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&ett_rpcordma_fragments,
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/* Fragment fields */
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&hf_rpcordma_fragments,
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&hf_rpcordma_fragment,
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&hf_rpcordma_fragment_overlap,
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&hf_rpcordma_fragment_overlap_conflicts,
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&hf_rpcordma_fragment_multiple_tails,
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&hf_rpcordma_fragment_too_long_fragment,
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&hf_rpcordma_fragment_error,
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&hf_rpcordma_fragment_count,
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/* Reassembled in field */
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&hf_rpcordma_reassembled_in,
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/* Reassembled length field */
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&hf_rpcordma_reassembled_length,
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/* Reassembled data field */
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&hf_rpcordma_reassembled_data,
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/* Tag */
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"RPCoRDMA fragments"
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};
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/* Reassembly table */
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static reassembly_table rpcordma_reassembly_table;
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enum MSG_TYPE {
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RDMA_MSG,
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RDMA_NOMSG,
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RDMA_MSGP,
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RDMA_DONE,
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RDMA_ERROR
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};
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static const value_string rpcordma_message_type[] = {
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{RDMA_MSG, "RDMA_MSG"},
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{RDMA_NOMSG, "RDMA_NOMSG"},
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{RDMA_MSGP, "RDMA_MSGP"},
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{RDMA_DONE, "RDMA_DONE"},
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{RDMA_ERROR, "RDMA_ERROR"},
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{0, NULL}
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};
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#define ERR_VERS 1
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#define ERR_CHUNK 2
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static const value_string rpcordma_err[] = {
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{ERR_VERS, "ERR_VERS"},
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{ERR_CHUNK, "ERR_CHUNK"},
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{0, NULL}
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};
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/* RDMA chunk type */
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typedef enum {
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RDMA_READ_CHUNK,
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RDMA_WRITE_CHUNK,
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RDMA_REPLY_CHUNK
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} chunk_type_t;
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/* RDMA segment */
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typedef struct {
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guint32 xdrpos; /* Position in XDR stream -- RDMA read only */
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guint32 handle; /* Registered memory handle */
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guint32 length; /* Length of segment in bytes */
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guint64 offset; /* Segment virtual address or offset */
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} rdma_segment_t;
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/* RDMA chunk */
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typedef struct {
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chunk_type_t type; /* Chunk type */
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guint32 length; /* Length of chunk in bytes */
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wmem_array_t *segments; /* List of segments for chunk */
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} rdma_chunk_t;
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/* RPC-over-RDMA lists */
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typedef struct {
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wmem_array_t *p_read_list; /* List of RDMA read chunks */
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wmem_array_t *p_write_list; /* List of RDMA write chunks */
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wmem_array_t *p_reply_list; /* List of RDMA reply chunks */
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} rdma_lists_t;
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/*
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* Segment information for RDMA I/O
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* All segments belonging to the same chunk list have the same message ID
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* A segment could have multiple I/O requests
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*/
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typedef struct {
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guint32 handle; /* Handle or remote key of segment */
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guint64 offset; /* Segment virtual address or offset */
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guint32 msgid; /* ID for fragments belonging together */
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guint32 msgno; /* Message number base so fragments are
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consecutive within segment requests */
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chunk_type_t type; /* Chunk type for segment */
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guint32 xdrpos; /* Position in XDR stream -- RDMA read only */
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guint32 length; /* Length of segment in bytes */
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guint32 rbytes; /* Number of bytes added to reassembly table */
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} segment_info_t;
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typedef struct {
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guint32 psn; /* First PSN for request */
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guint32 length; /* Request length */
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guint64 offset; /* Request offset */
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segment_info_t *segment; /* Segment info for RDMA I/O */
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} ib_request_t;
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/* Send reassembly info structure */
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typedef struct {
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guint32 msgid; /* ID for fragments belonging together */
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guint32 msgno; /* Message number base */
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guint32 rsize; /* Number of bytes added to reassembly table */
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} send_info_t;
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/* State structure per conversation */
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typedef struct {
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wmem_tree_t *segment_list; /* Binary tree of segments searched by handle */
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wmem_tree_t *psn_list; /* Binary tree of IB requests searched by PSN */
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wmem_tree_t *msgid_list; /* Binary tree of segments with same message id */
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wmem_tree_t *request_list; /* Binary tree of iWarp read requests for mapping sink -> source */
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wmem_tree_t *send_list; /* Binary tree for mapping PSN -> msgid (IB) */
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wmem_tree_t *msn_list; /* Binary tree for mapping MSN -> msgid (iWarp) */
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segment_info_t *segment_info; /* Current READ/WRITE/REPLY segment info */
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guint32 iosize; /* Maximum size of data transferred in a
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single packet */
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} rdma_conv_info_t;
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/* Proto data keys */
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enum {
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RPCRDMA_MSG_ID,
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RPCRDMA_FRAG_HEAD,
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RPCRDMA_WRITE_SIZE,
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};
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/* Return the number of fragments of size 'b' in 'a' */
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#define NFRAGS(a,b) ((a)/(b) + ((a)%(b) ? 1: 0))
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/*
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* Global variable set for every InfiniBand packet. This is used because
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* the arguments in dissect_rpcrdma are fixed and cannot be changed to pass
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* an extra argument to differentiate between InfiniBand and iWarp.
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* Reassembly is only supported for InfiniBand packets.
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*/
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static struct infinibandinfo *gp_infiniband_info = NULL;
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/* Global variable set for every iWarp packet */
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static rdmap_info_t *gp_rdmap_info = NULL;
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/* Call process_reassembled_data just once per frame */
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static gboolean g_needs_reassembly = FALSE;
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/* Array of offsets for reduced data in write chunks */
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static wmem_array_t *gp_rdma_write_offsets = NULL;
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/* Signal upper layer(s) the current frame's data has been reduced by DDP */
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static gboolean g_rpcrdma_reduced = FALSE;
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/*
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* Signal upper layer(s) the current frame's data has been reduced by DDP
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* (direct data placement) in which large data chunks have been removed from
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* the XDR data so these data chunks could be transferred using RDMA writes.
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* This is only used on RDMA write chunks because there is no way to know
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* where each write chunk must be inserted into the XDR data.
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* Read chunks have the xdrpos because the client needs to notify the server
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* how to reassemble the reduced message and their chunks. On the other hand,
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* write chunks do not have this information because the client knows exactly
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* how to reassemble the reply with the use of the virtual address in the chunk,
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* but this virtual address is internal to the client -- there is no way to
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* map the virtual address to an offset within the XDR data.
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*/
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gboolean rpcrdma_is_reduced(void)
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{
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return g_rpcrdma_reduced;
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}
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/*
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* Insert offset in the reduced data write chunk array.
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* Offset is relative to the reduced message from the end of the reported
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* buffer because the upper layer is dealing with the reduced XDR message
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* so it is easier to report this offset back and calculate the correct XDR
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* position in this layer before reassembly starts for a reduced message
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*/
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void rpcrdma_insert_offset(gint offset)
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{
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wmem_array_append_one(gp_rdma_write_offsets, offset);
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}
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/*
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* Reset the array of write offsets at the end of the frame. These
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* are packet scoped, so they don't need to be freed, but we want
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* to ensure that the global doesn't point to no longer allocated
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* memory in a later packet.
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*/
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static void
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reset_write_offsets(void)
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{
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gp_rdma_write_offsets = NULL;
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}
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/* Get conversation state, it is created if it does not exist */
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static rdma_conv_info_t *get_rdma_conv_info(packet_info *pinfo)
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{
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conversation_t *p_conversation;
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rdma_conv_info_t *p_rdma_conv_info;
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/* Find or create conversation info */
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p_conversation = find_or_create_conversation(pinfo);
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/* Get state structure for this conversation */
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p_rdma_conv_info = (rdma_conv_info_t *)conversation_get_proto_data(p_conversation, proto_rpcordma);
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if (p_rdma_conv_info == NULL) {
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/* Add state structure for this conversation */
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p_rdma_conv_info = wmem_new(wmem_file_scope(), rdma_conv_info_t);
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p_rdma_conv_info->segment_list = wmem_tree_new(wmem_file_scope());
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p_rdma_conv_info->psn_list = wmem_tree_new(wmem_file_scope());
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p_rdma_conv_info->msgid_list = wmem_tree_new(wmem_file_scope());
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p_rdma_conv_info->send_list = wmem_tree_new(wmem_file_scope());
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p_rdma_conv_info->msn_list = wmem_tree_new(wmem_file_scope());
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p_rdma_conv_info->request_list = wmem_tree_new(wmem_file_scope());
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p_rdma_conv_info->segment_info = NULL;
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p_rdma_conv_info->iosize = 1;
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conversation_add_proto_data(p_conversation, proto_rpcordma, p_rdma_conv_info);
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}
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return p_rdma_conv_info;
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}
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/* Set RDMA maximum I/O size for conversation */
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static void set_max_iosize(rdma_conv_info_t *p_rdma_conv_info, guint size)
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{
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p_rdma_conv_info->iosize = MAX(p_rdma_conv_info->iosize, size);
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}
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/* Return a unique non-zero message ID */
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static guint32 get_msg_id(void)
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{
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static guint32 msg_id = 0;
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if (++msg_id == 0) {
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/* Message ID has wrapped around so increment again */
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++msg_id;
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}
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return msg_id;
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}
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/* Find segment info for the given handle and offset */
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static segment_info_t *find_segment_info(rdma_conv_info_t *p_rdma_conv_info, guint32 handle, guint64 offset)
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{
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segment_info_t *p_segment_info;
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p_segment_info = (segment_info_t *)wmem_tree_lookup32(p_rdma_conv_info->segment_list, handle);
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if (p_segment_info && offset >= p_segment_info->offset && \
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offset < p_segment_info->offset + p_segment_info->length)
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return p_segment_info;
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return NULL;
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}
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/* Add Infiniband request info for the correct segment */
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static void add_request_info(rdma_conv_info_t *p_rdma_conv_info, packet_info *pinfo)
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{
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segment_info_t *p_segment_info;
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ib_request_t *p_ib_request;
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if (!pinfo->fd->visited) {
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p_segment_info = find_segment_info(p_rdma_conv_info, gp_infiniband_info->reth_remote_key, gp_infiniband_info->reth_remote_address);
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if (p_segment_info) {
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/* Add request to list */
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p_ib_request = wmem_new(wmem_file_scope(), ib_request_t);
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p_ib_request->psn = gp_infiniband_info->packet_seq_num;
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p_ib_request->offset = gp_infiniband_info->reth_remote_address;
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p_ib_request->length = gp_infiniband_info->reth_dma_length;
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p_ib_request->segment = p_segment_info;
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wmem_tree_insert32(p_rdma_conv_info->psn_list, gp_infiniband_info->packet_seq_num, p_ib_request);
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}
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}
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}
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/*
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* Return if reassembly is done by checking all bytes in each segment have
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* been added to the reassembly table. It could be more than requested
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* because of padding bytes.
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*/
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static gboolean is_reassembly_done(rdma_conv_info_t *p_rdma_conv_info, guint32 msgid)
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{
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guint32 message_size = 0;
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guint32 reassembled_size = 0;
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wmem_list_frame_t *item;
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wmem_list_t *msgid_segments;
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segment_info_t *p_segment_info;
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gboolean ret = FALSE; /* Make sure there is at least one segment */
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int segment_type = -1;
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/* Get all segments for the given msgid */
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msgid_segments = wmem_tree_lookup32(p_rdma_conv_info->msgid_list, msgid);
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if (msgid_segments) {
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for (item = wmem_list_head(msgid_segments); item != NULL; item = wmem_list_frame_next(item)) {
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p_segment_info = wmem_list_frame_data(item);
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segment_type = p_segment_info->type;
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if (p_segment_info->rbytes < p_segment_info->length) {
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/* Not all bytes have been received for this request */
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return FALSE;
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}
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/* At least one segment is done, check the rest */
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ret = TRUE;
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message_size += p_segment_info->length;
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reassembled_size += p_segment_info->rbytes;
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}
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}
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if (ret && segment_type == RDMA_READ_CHUNK) {
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/*
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* Make sure all bytes are added to the reassembly table. Since the
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* reassembly is done on the READ_RESPONSE_LAST, a read request could
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* happen after the last read response for the previous request, in
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* this case this will give a false positive so check the total size
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* of all chunks (all segments required for the message)
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*/
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return (reassembled_size >= message_size);
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}
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return ret;
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}
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/*
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* Get the fragment head from the cache
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* Returns NULL if still missing fragments
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*/
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static fragment_head *get_fragment_head(packet_info *pinfo)
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{
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return (fragment_head *)p_get_proto_data(wmem_file_scope(), pinfo, proto_rpcordma, RPCRDMA_FRAG_HEAD);
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}
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/* Save the fragment head on the proto data cache */
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static void set_fragment_head(fragment_head *fd_head, packet_info *pinfo)
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{
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if (fd_head && fd_head != get_fragment_head(pinfo)) {
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/* Add the fragment head to the packet cache */
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p_add_proto_data(wmem_file_scope(), pinfo, proto_rpcordma, RPCRDMA_FRAG_HEAD, fd_head);
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}
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}
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/*
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* Get the fragment head for the current frame
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* Returns non-NULL if this frame is a fragment
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*/
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static fragment_head *get_reassembled_id(packet_info *pinfo)
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{
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guint32 *p_msgid;
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p_msgid = (guint32 *)p_get_proto_data(wmem_file_scope(), pinfo, proto_rpcordma, RPCRDMA_MSG_ID);
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if (p_msgid) {
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return fragment_get_reassembled_id(&rpcordma_reassembly_table, pinfo, *p_msgid);
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}
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return NULL;
|
|
}
|
|
|
|
/* Get the reassembled data, returns NULL if still missing fragments */
|
|
static tvbuff_t *get_reassembled_data(tvbuff_t *tvb, guint offset,
|
|
packet_info *pinfo, proto_tree *tree)
|
|
{
|
|
tvbuff_t *new_tvb = NULL;
|
|
fragment_head *fd_head;
|
|
|
|
if (g_needs_reassembly) {
|
|
/* Get fragment head for fragment to display "Reassembled in" message */
|
|
fd_head = get_reassembled_id(pinfo);
|
|
if (!fd_head) {
|
|
/* Get fragment head on frame where reassembly has been completed */
|
|
fd_head = get_fragment_head(pinfo);
|
|
}
|
|
if (fd_head) {
|
|
new_tvb = process_reassembled_data(tvb, offset, pinfo,
|
|
"Reassembled RPCoRDMA Message", fd_head, &rpcordma_frag_items,
|
|
NULL, tree);
|
|
/* Call process_reassembled_data just once per frame */
|
|
g_needs_reassembly = FALSE;
|
|
}
|
|
}
|
|
return new_tvb;
|
|
}
|
|
|
|
/*
|
|
* Complete reassembly:
|
|
* 1. If p_rdma_conv_info is NULL then complete reassembly.
|
|
* 2. If p_rdma_conv_info is non-NULL then complete reassembly only if
|
|
* reassembly is really done by making sure all data has been received.
|
|
*/
|
|
static fragment_head *end_reassembly(guint32 msgid,
|
|
rdma_conv_info_t *p_rdma_conv_info, packet_info *pinfo)
|
|
{
|
|
fragment_head *fd_head = NULL;
|
|
|
|
/* Check if reassembly is really done only if p_rdma_conv_info is non-NULL */
|
|
if (!p_rdma_conv_info || is_reassembly_done(p_rdma_conv_info, msgid)) {
|
|
/* Complete the reassembly */
|
|
fd_head = fragment_end_seq_next(&rpcordma_reassembly_table, pinfo, msgid, NULL);
|
|
set_fragment_head(fd_head, pinfo);
|
|
}
|
|
return fd_head;
|
|
}
|
|
|
|
/*
|
|
* Add a fragment to the reassembly table and return the reassembled data
|
|
* if all fragments have been added
|
|
*/
|
|
static tvbuff_t *add_fragment(tvbuff_t *tvb, gint offset, guint32 msgid,
|
|
gint32 msg_num, gboolean more_frags, rdma_conv_info_t *p_rdma_conv_info,
|
|
packet_info *pinfo, proto_tree *tree)
|
|
{
|
|
guint8 pad_count = 0;
|
|
guint32 nbytes, frag_size;
|
|
tvbuff_t *new_tvb = NULL;
|
|
fragment_head *fd_head = NULL;
|
|
guint32 *p_msgid;
|
|
|
|
if (gp_infiniband_info) {
|
|
pad_count = gp_infiniband_info->pad_count;
|
|
}
|
|
|
|
/* Get fragment head if reassembly has been completed */
|
|
fd_head = get_fragment_head(pinfo);
|
|
if (fd_head == NULL) {
|
|
/* Reassembly has not been completed yet */
|
|
if (msg_num >= 0) {
|
|
nbytes = tvb_captured_length_remaining(tvb, offset);
|
|
if (nbytes > 0 || more_frags) {
|
|
/* Add message fragment to reassembly table */
|
|
if (pad_count > 0 && p_rdma_conv_info && \
|
|
p_rdma_conv_info->segment_info != NULL && \
|
|
p_rdma_conv_info->segment_info->type == RDMA_READ_CHUNK && \
|
|
p_rdma_conv_info->segment_info->xdrpos == 0) {
|
|
/* Do not include any padding bytes inserted by Infiniband
|
|
* layer if this is a PZRC (Position-Zero Read Chunk) since
|
|
* payload stream already has any necessary padding bytes */
|
|
frag_size = tvb_reported_length_remaining(tvb, offset) - pad_count;
|
|
if (frag_size < nbytes) {
|
|
nbytes = frag_size;
|
|
}
|
|
}
|
|
fd_head = fragment_add_seq_check(&rpcordma_reassembly_table,
|
|
tvb, offset, pinfo,
|
|
msgid, NULL, (guint32)msg_num,
|
|
nbytes, more_frags);
|
|
/* Save the msgid in the proto data cache */
|
|
p_msgid = wmem_new(wmem_file_scope(), guint32);
|
|
*p_msgid = msgid;
|
|
p_add_proto_data(wmem_file_scope(), pinfo, proto_rpcordma, RPCRDMA_MSG_ID, p_msgid);
|
|
} else if (p_rdma_conv_info) {
|
|
/* No data in this frame, so just complete the reassembly
|
|
* if reassembly is really done */
|
|
fd_head = end_reassembly(msgid, p_rdma_conv_info, pinfo);
|
|
}
|
|
/* Add the fragment head to the packet cache */
|
|
set_fragment_head(fd_head, pinfo);
|
|
}
|
|
}
|
|
|
|
/* Get reassembled data */
|
|
new_tvb = get_reassembled_data(tvb, 0, pinfo, tree);
|
|
|
|
return new_tvb;
|
|
}
|
|
|
|
/*
|
|
* Add an Infiniband fragment to the reassembly table and return the
|
|
* reassembled data if all fragments have been added
|
|
*/
|
|
static tvbuff_t *add_ib_fragment(tvbuff_t *tvb,
|
|
rdma_conv_info_t *p_rdma_conv_info, gboolean only_frag,
|
|
packet_info *pinfo, proto_tree *tree)
|
|
{
|
|
guint32 msgid, msg_num, msg_off;
|
|
guint32 nfrags, psndelta = 0;
|
|
tvbuff_t *new_tvb = NULL;
|
|
ib_request_t *p_ib_request;
|
|
segment_info_t *p_segment_info = NULL;
|
|
guint32 iosize = p_rdma_conv_info->iosize;
|
|
guint64 va_offset;
|
|
|
|
if (pinfo->fd->visited) {
|
|
return get_reassembled_data(tvb, 0, pinfo, tree);
|
|
} else if (only_frag) {
|
|
/* Write Only: no request so use segment info */
|
|
p_segment_info = find_segment_info(p_rdma_conv_info, gp_infiniband_info->reth_remote_key, gp_infiniband_info->reth_remote_address);
|
|
va_offset = gp_infiniband_info->reth_remote_address;
|
|
} else {
|
|
p_rdma_conv_info->segment_info = NULL;
|
|
/* Get correct request */
|
|
p_ib_request = (ib_request_t *)wmem_tree_lookup32_le(p_rdma_conv_info->psn_list, gp_infiniband_info->packet_seq_num);
|
|
if (p_ib_request) {
|
|
psndelta = gp_infiniband_info->packet_seq_num - p_ib_request->psn;
|
|
nfrags = NFRAGS((p_ib_request->length), iosize);
|
|
if (psndelta < nfrags) {
|
|
/* This is the correct request */
|
|
p_segment_info = p_ib_request->segment;
|
|
/* Make message number relative to request */
|
|
va_offset = p_ib_request->offset;
|
|
}
|
|
}
|
|
}
|
|
if (p_segment_info) {
|
|
p_rdma_conv_info->segment_info = p_segment_info;
|
|
p_segment_info->rbytes += tvb_reported_length(tvb);
|
|
/* Make message number relative to request or segment(write only) */
|
|
msg_off = (guint32)NFRAGS((va_offset - p_segment_info->offset), iosize) + psndelta;
|
|
msgid = p_segment_info->msgid;
|
|
msg_num = p_segment_info->msgno + 1 + msg_off;
|
|
new_tvb = add_fragment(tvb, 0, msgid, msg_num, TRUE, p_rdma_conv_info, pinfo, tree);
|
|
}
|
|
return new_tvb;
|
|
}
|
|
|
|
/*
|
|
* Add padding bytes as a separate fragment when last fragment's data is not
|
|
* on a four-byte boundary. The MPA layer removes the padding bytes from all
|
|
* iWarp Reads/Writes. The iWarp Send messages are padded correctly.
|
|
*/
|
|
static void add_iwarp_padding(tvbuff_t *tvb, gint offset,
|
|
guint32 msgid, guint32 msgno, packet_info *pinfo)
|
|
{
|
|
gchar *pbuf;
|
|
tvbuff_t *pad_tvb;
|
|
/* Size of payload data for current iWarp Read/Write */
|
|
guint32 bsize = tvb_reported_length_remaining(tvb, offset);
|
|
/* Number of padding bytes needed */
|
|
guint32 padding = (4 - (bsize%4)) % 4;
|
|
|
|
if (padding > 0) {
|
|
/* Allocate buffer for the number of padding bytes that will be added */
|
|
pbuf = (gchar *)wmem_alloc(pinfo->pool, padding);
|
|
memset(pbuf, 0, padding);
|
|
/* Create tvb buffer */
|
|
pad_tvb = tvb_new_real_data(pbuf, padding, padding);
|
|
/* Add padding fragment to the reassembly table */
|
|
fragment_add_seq_check(&rpcordma_reassembly_table, pad_tvb, 0,
|
|
pinfo, msgid, NULL, msgno, padding, TRUE);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Add an iWarp fragment to the reassembly table and return the
|
|
* reassembled data if all fragments have been added
|
|
*/
|
|
static tvbuff_t *add_iwarp_fragment(tvbuff_t *tvb,
|
|
rdma_conv_info_t *p_rdma_conv_info, packet_info *pinfo,
|
|
proto_tree *tree)
|
|
{
|
|
guint32 sbytes = 0; /* Total bytes for all segments in current reassembly */
|
|
guint32 rbytes = 0; /* Total bytes received so far */
|
|
guint32 msgno; /* Message number for this fragment */
|
|
guint32 steering_tag;
|
|
guint64 tagged_offset;
|
|
gboolean more_frags = TRUE;
|
|
wmem_list_t *msgid_segments;
|
|
wmem_list_frame_t *item;
|
|
segment_info_t *p_seginfo;
|
|
segment_info_t *p_segment_info;
|
|
rdmap_request_t *p_read_request = NULL;
|
|
tvbuff_t *new_tvb = NULL;
|
|
|
|
if (pinfo->fd->visited) {
|
|
return get_reassembled_data(tvb, 0, pinfo, tree);
|
|
} else if (gp_rdmap_info->opcode == RDMA_READ_RESPONSE) {
|
|
/* Read fragment: map sink -> source using the request info */
|
|
p_read_request = wmem_tree_lookup32(p_rdma_conv_info->request_list, gp_rdmap_info->steering_tag);
|
|
if (p_read_request) {
|
|
/* Map Read Response STag to segment STag */
|
|
steering_tag = p_read_request->source_stag;
|
|
/* Map Read Response offset to segment offset */
|
|
tagged_offset = gp_rdmap_info->tagged_offset - p_read_request->sink_toffset + p_read_request->source_toffset;
|
|
} else {
|
|
return NULL;
|
|
}
|
|
} else {
|
|
/* Write fragment: no need for mapping, use steering tag and offset */
|
|
steering_tag = gp_rdmap_info->steering_tag;
|
|
tagged_offset = gp_rdmap_info->tagged_offset;
|
|
}
|
|
|
|
p_rdma_conv_info->segment_info = NULL;
|
|
p_segment_info = find_segment_info(p_rdma_conv_info, steering_tag, tagged_offset);
|
|
if (p_segment_info) {
|
|
/* Message number is relative with respect to chunk, adding
|
|
* one since msgno = 0 is reserved for the reduced message */
|
|
msgno = (guint32)(tagged_offset - p_segment_info->offset) + p_segment_info->msgno + 1;
|
|
p_rdma_conv_info->segment_info = p_segment_info;
|
|
|
|
/* Include this fragment's data */
|
|
p_segment_info->rbytes += tvb_captured_length_remaining(tvb, 0);
|
|
|
|
if (gp_rdmap_info->last_flag) {
|
|
/* This is a last fragment so go through all segments
|
|
* to calculate sbytes and rbytes */
|
|
msgid_segments = wmem_tree_lookup32(p_rdma_conv_info->msgid_list, p_segment_info->msgid);
|
|
if (msgid_segments) {
|
|
for (item = wmem_list_head(msgid_segments); item != NULL; item = wmem_list_frame_next(item)) {
|
|
p_seginfo = wmem_list_frame_data(item);
|
|
sbytes += p_seginfo->length;
|
|
rbytes += p_seginfo->rbytes;
|
|
}
|
|
}
|
|
if (p_read_request && rbytes == sbytes) {
|
|
/* Complete read chunk reassembly since all fragments
|
|
* have been received */
|
|
more_frags = FALSE;
|
|
}
|
|
}
|
|
new_tvb = add_fragment(tvb, 0, p_segment_info->msgid, msgno, TRUE, p_rdma_conv_info, pinfo, tree);
|
|
if ((!new_tvb && !more_frags) || (gp_rdmap_info->last_flag && !p_read_request && rbytes == sbytes)) {
|
|
/* This is the very last fragment, include any padding if needed */
|
|
add_iwarp_padding(tvb, 0, p_segment_info->msgid, msgno+1, pinfo);
|
|
}
|
|
if (!new_tvb && !more_frags) {
|
|
/* Complete reassembly */
|
|
end_reassembly(p_segment_info->msgid, p_rdma_conv_info, pinfo);
|
|
new_tvb = get_reassembled_data(tvb, 0, pinfo, tree);
|
|
}
|
|
}
|
|
return new_tvb;
|
|
}
|
|
|
|
static guint get_read_list_size(tvbuff_t *tvb, guint max_offset, guint offset)
|
|
{
|
|
guint32 value_follows;
|
|
guint start = offset;
|
|
|
|
while (1) {
|
|
value_follows = tvb_get_ntohl(tvb, offset);
|
|
offset += 4;
|
|
if (offset > max_offset)
|
|
return 0;
|
|
if (!value_follows)
|
|
break;
|
|
|
|
offset += 20;
|
|
if (offset > max_offset)
|
|
return 0;
|
|
}
|
|
|
|
return offset - start;
|
|
}
|
|
|
|
static guint get_read_list_chunk_count(tvbuff_t *tvb, guint offset)
|
|
{
|
|
guint32 value_follows;
|
|
guint num_chunks;
|
|
|
|
num_chunks = 0;
|
|
while (1) {
|
|
value_follows = tvb_get_ntohl(tvb, offset);
|
|
offset += 4;
|
|
if (!value_follows)
|
|
break;
|
|
|
|
num_chunks++;
|
|
offset += 20;
|
|
}
|
|
return num_chunks;
|
|
}
|
|
|
|
static guint get_write_chunk_size(tvbuff_t *tvb, guint offset)
|
|
{
|
|
guint segment_count;
|
|
guint max_count = (guint)tvb_reported_length_remaining(tvb, offset + 4) / 16;
|
|
|
|
segment_count = tvb_get_ntohl(tvb, offset);
|
|
if (segment_count > max_count) {
|
|
/* XXX We should throw an exception here. */
|
|
segment_count = max_count;
|
|
}
|
|
return 4 + (segment_count * 16);
|
|
}
|
|
|
|
static guint get_write_list_size(tvbuff_t *tvb, guint max_offset, guint offset)
|
|
{
|
|
guint32 value_follows;
|
|
guint chunk_size, start = offset;
|
|
|
|
while (1) {
|
|
value_follows = tvb_get_ntohl(tvb, offset);
|
|
offset += 4;
|
|
if (offset > max_offset)
|
|
return 0;
|
|
if (!value_follows)
|
|
break;
|
|
|
|
chunk_size = get_write_chunk_size(tvb, offset);
|
|
if (max_offset - offset < chunk_size)
|
|
return 0;
|
|
offset += chunk_size;
|
|
}
|
|
|
|
return offset - start;
|
|
}
|
|
|
|
static guint get_write_list_chunk_count(tvbuff_t *tvb, guint offset)
|
|
{
|
|
guint32 value_follows;
|
|
guint num_chunks, chunk_size;
|
|
|
|
num_chunks = 0;
|
|
while (1) {
|
|
value_follows = tvb_get_ntohl(tvb, offset);
|
|
offset += 4;
|
|
if (!value_follows)
|
|
break;
|
|
|
|
num_chunks++;
|
|
chunk_size = get_write_chunk_size(tvb, offset);
|
|
if (chunk_size == 0)
|
|
break;
|
|
offset += chunk_size;
|
|
}
|
|
|
|
return num_chunks;
|
|
}
|
|
|
|
static guint get_reply_chunk_size(tvbuff_t *tvb, guint max_offset, guint offset)
|
|
{
|
|
guint32 value_follows;
|
|
guint start = offset;
|
|
|
|
value_follows = tvb_get_ntohl(tvb, offset);
|
|
offset += 4;
|
|
if (offset > max_offset)
|
|
return 0;
|
|
|
|
if (value_follows) {
|
|
offset += get_write_chunk_size(tvb, offset);
|
|
if (offset > max_offset)
|
|
return 0;
|
|
}
|
|
|
|
return offset - start;
|
|
}
|
|
|
|
static guint get_reply_chunk_count(tvbuff_t *tvb, guint offset)
|
|
{
|
|
guint32 value_follows;
|
|
|
|
value_follows = tvb_get_ntohl(tvb, offset);
|
|
return value_follows ? 1 : 0;
|
|
}
|
|
|
|
/*
|
|
* The RDMA read list is given as a list of read segments in the protocol.
|
|
* In order to create a list of chunks, all segments having the same XDR
|
|
* position will be part of an RDMA read chunk.
|
|
*/
|
|
static void add_rdma_read_segment(wmem_array_t *p_read_list,
|
|
rdma_segment_t *p_rdma_segment)
|
|
{
|
|
guint i;
|
|
rdma_segment_t *p_segment;
|
|
rdma_chunk_t *p_rdma_chunk = NULL;
|
|
|
|
/* Look for correct chunk where to insert the segment */
|
|
for (i=0; i<wmem_array_get_count(p_read_list); i++) {
|
|
p_rdma_chunk = (rdma_chunk_t *)wmem_array_index(p_read_list, i);
|
|
p_segment = (rdma_segment_t *)wmem_array_index(p_rdma_chunk->segments, 0);
|
|
if (p_segment->xdrpos == p_rdma_segment->xdrpos) {
|
|
/* Found correct read chunk */
|
|
break;
|
|
} else {
|
|
p_rdma_chunk = NULL;
|
|
}
|
|
}
|
|
|
|
if (p_rdma_chunk == NULL) {
|
|
/* No read chunk was found so initialize a new chunk */
|
|
p_rdma_chunk = wmem_new(wmem_packet_scope(), rdma_chunk_t);
|
|
p_rdma_chunk->type = RDMA_READ_CHUNK;
|
|
p_rdma_chunk->segments = wmem_array_new(wmem_packet_scope(), sizeof(rdma_segment_t));
|
|
/* Add read chunk to the RDMA read list */
|
|
wmem_array_append(p_read_list, p_rdma_chunk, 1);
|
|
}
|
|
|
|
/* Add segment to the read chunk */
|
|
wmem_array_append(p_rdma_chunk->segments, p_rdma_segment, 1);
|
|
}
|
|
|
|
static guint dissect_rpcrdma_read_chunk(proto_tree *read_list,
|
|
tvbuff_t *tvb, guint offset, wmem_array_t *p_read_list)
|
|
{
|
|
proto_tree *read_chunk;
|
|
guint32 position;
|
|
rdma_segment_t *p_rdma_segment;
|
|
|
|
/* Initialize read segment */
|
|
p_rdma_segment = wmem_new(wmem_packet_scope(), rdma_segment_t);
|
|
|
|
position = tvb_get_ntohl(tvb, offset);
|
|
p_rdma_segment->xdrpos = position;
|
|
read_chunk = proto_tree_add_subtree_format(read_list, tvb,
|
|
offset, 20, ett_rpcordma_read_chunk, NULL,
|
|
"Read chunk: (position %u)", position);
|
|
|
|
proto_tree_add_item(read_chunk, hf_rpcordma_position, tvb,
|
|
offset, 4, ENC_BIG_ENDIAN);
|
|
offset += 4;
|
|
proto_tree_add_item_ret_uint(read_chunk, hf_rpcordma_rdma_handle, tvb,
|
|
offset, 4, ENC_BIG_ENDIAN, &p_rdma_segment->handle);
|
|
offset += 4;
|
|
proto_tree_add_item_ret_uint(read_chunk, hf_rpcordma_rdma_length, tvb,
|
|
offset, 4, ENC_BIG_ENDIAN, &p_rdma_segment->length);
|
|
offset += 4;
|
|
proto_tree_add_item_ret_uint64(read_chunk, hf_rpcordma_rdma_offset, tvb,
|
|
offset, 8, ENC_BIG_ENDIAN, &p_rdma_segment->offset);
|
|
|
|
add_rdma_read_segment(p_read_list, p_rdma_segment);
|
|
return offset + 8;
|
|
}
|
|
|
|
static guint dissect_rpcrdma_read_list(tvbuff_t *tvb, guint offset,
|
|
proto_tree *tree, rdma_lists_t *rdma_lists)
|
|
{
|
|
guint chunk_count, start = offset;
|
|
proto_tree *read_list;
|
|
guint32 value_follows;
|
|
proto_item *item;
|
|
|
|
chunk_count = get_read_list_chunk_count(tvb, offset);
|
|
item = proto_tree_add_uint_format(tree, hf_rpcordma_reads_count,
|
|
tvb, offset, 0, chunk_count,
|
|
"Read list (count: %u)", chunk_count);
|
|
|
|
read_list = proto_item_add_subtree(item, ett_rpcordma_read_list);
|
|
|
|
while (1) {
|
|
value_follows = tvb_get_ntohl(tvb, offset);
|
|
offset += 4;
|
|
if (!value_follows)
|
|
break;
|
|
|
|
if (rdma_lists->p_read_list == NULL) {
|
|
/* Initialize RDMA read list */
|
|
rdma_lists->p_read_list = wmem_array_new(wmem_packet_scope(), sizeof(rdma_chunk_t));
|
|
}
|
|
offset = dissect_rpcrdma_read_chunk(read_list, tvb, offset, rdma_lists->p_read_list);
|
|
}
|
|
|
|
proto_item_set_len(item, offset - start);
|
|
return offset;
|
|
}
|
|
|
|
static guint dissect_rpcrdma_segment(proto_tree *write_chunk, tvbuff_t *tvb,
|
|
guint offset, guint32 i, wmem_array_t *p_segments)
|
|
{
|
|
proto_tree *segment;
|
|
rdma_segment_t *p_rdma_segment;
|
|
|
|
/* Initialize write segment */
|
|
p_rdma_segment = wmem_new(wmem_packet_scope(), rdma_segment_t);
|
|
p_rdma_segment->xdrpos = 0; /* Not used in write segments */
|
|
|
|
segment = proto_tree_add_subtree_format(write_chunk, tvb,
|
|
offset, 16, ett_rpcordma_segment, NULL,
|
|
"RDMA segment %u", i);
|
|
|
|
proto_tree_add_item_ret_uint(segment, hf_rpcordma_rdma_handle, tvb,
|
|
offset, 4, ENC_BIG_ENDIAN, &p_rdma_segment->handle);
|
|
offset += 4;
|
|
proto_tree_add_item_ret_uint(segment, hf_rpcordma_rdma_length, tvb,
|
|
offset, 4, ENC_BIG_ENDIAN, &p_rdma_segment->length);
|
|
offset += 4;
|
|
proto_tree_add_item_ret_uint64(segment, hf_rpcordma_rdma_offset, tvb,
|
|
offset, 8, ENC_BIG_ENDIAN, &p_rdma_segment->offset);
|
|
|
|
/* Add segment to the write chunk */
|
|
wmem_array_append(p_segments, p_rdma_segment, 1);
|
|
return offset + 8;
|
|
}
|
|
|
|
static guint dissect_rpcrdma_write_chunk(proto_tree *write_list, tvbuff_t *tvb,
|
|
guint offset, chunk_type_t chunk_type, wmem_array_t *p_rdma_list)
|
|
{
|
|
guint32 i, segment_count;
|
|
proto_tree *write_chunk;
|
|
guint selection_size;
|
|
rdma_chunk_t *p_rdma_chunk;
|
|
|
|
selection_size = get_write_chunk_size(tvb, offset);
|
|
segment_count = tvb_get_ntohl(tvb, offset);
|
|
write_chunk = proto_tree_add_subtree_format(write_list, tvb,
|
|
offset, selection_size,
|
|
ett_rpcordma_write_chunk, NULL,
|
|
"Write chunk (%u segment%s)", segment_count,
|
|
segment_count == 1 ? "" : "s");
|
|
proto_tree_add_item(write_chunk, hf_rpcordma_segment_count,
|
|
tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
offset += 4;
|
|
|
|
/* Initialize write chunk */
|
|
p_rdma_chunk = wmem_new(wmem_packet_scope(), rdma_chunk_t);
|
|
p_rdma_chunk->type = chunk_type;
|
|
p_rdma_chunk->segments = wmem_array_new(wmem_packet_scope(), sizeof(rdma_segment_t));
|
|
|
|
/* Add chunk to the write/reply list */
|
|
wmem_array_append(p_rdma_list, p_rdma_chunk, 1);
|
|
|
|
for (i = 0; i < segment_count; ++i)
|
|
offset = dissect_rpcrdma_segment(write_chunk, tvb, offset, i, p_rdma_chunk->segments);
|
|
|
|
return offset;
|
|
}
|
|
|
|
static guint dissect_rpcrdma_write_list(tvbuff_t *tvb, guint offset,
|
|
proto_tree *tree, rdma_lists_t *rdma_lists)
|
|
{
|
|
guint chunk_count, start = offset;
|
|
proto_tree *write_list;
|
|
guint32 value_follows;
|
|
proto_item *item;
|
|
|
|
chunk_count = get_write_list_chunk_count(tvb, offset);
|
|
item = proto_tree_add_uint_format(tree, hf_rpcordma_writes_count,
|
|
tvb, offset, 0, chunk_count,
|
|
"Write list (count: %u)", chunk_count);
|
|
|
|
write_list = proto_item_add_subtree(item, ett_rpcordma_write_list);
|
|
|
|
while (1) {
|
|
value_follows = tvb_get_ntohl(tvb, offset);
|
|
offset += 4;
|
|
if (!value_follows)
|
|
break;
|
|
|
|
if (rdma_lists->p_write_list == NULL) {
|
|
/* Initialize RDMA write list */
|
|
rdma_lists->p_write_list = wmem_array_new(wmem_packet_scope(), sizeof(rdma_chunk_t));
|
|
}
|
|
offset = dissect_rpcrdma_write_chunk(write_list, tvb, offset, RDMA_WRITE_CHUNK, rdma_lists->p_write_list);
|
|
}
|
|
|
|
proto_item_set_len(item, offset - start);
|
|
return offset;
|
|
}
|
|
|
|
static guint dissect_rpcrdma_reply_chunk(tvbuff_t *tvb, guint offset,
|
|
proto_tree *tree, rdma_lists_t *rdma_lists)
|
|
{
|
|
guint32 chunk_count, start = offset;
|
|
proto_tree *reply_chunk;
|
|
guint32 value_follows;
|
|
proto_item *item;
|
|
|
|
chunk_count = get_reply_chunk_count(tvb, offset);
|
|
item = proto_tree_add_uint_format(tree, hf_rpcordma_reply_count,
|
|
tvb, offset, 4, chunk_count,
|
|
"Reply chunk (count: %u)", chunk_count);
|
|
|
|
reply_chunk = proto_item_add_subtree(item, ett_rpcordma_reply_chunk);
|
|
|
|
value_follows = tvb_get_ntohl(tvb, offset);
|
|
offset += 4;
|
|
if (!value_follows)
|
|
return offset;
|
|
|
|
/* Initialize RDMA reply list */
|
|
rdma_lists->p_reply_list = wmem_array_new(wmem_packet_scope(), sizeof(rdma_chunk_t));
|
|
|
|
offset = dissect_rpcrdma_write_chunk(reply_chunk, tvb, offset, RDMA_REPLY_CHUNK, rdma_lists->p_reply_list);
|
|
proto_item_set_len(item, offset - start);
|
|
return offset;
|
|
}
|
|
|
|
static guint parse_rdma_header(tvbuff_t *tvb, guint offset, proto_tree *tree,
|
|
rdma_lists_t *rdma_lists)
|
|
{
|
|
offset = dissect_rpcrdma_read_list(tvb, offset, tree, rdma_lists);
|
|
offset = dissect_rpcrdma_write_list(tvb, offset, tree, rdma_lists);
|
|
return dissect_rpcrdma_reply_chunk(tvb, offset, tree, rdma_lists);
|
|
}
|
|
|
|
static guint get_chunk_lists_size(tvbuff_t *tvb, guint max_offset, guint offset)
|
|
{
|
|
guint size, start = offset;
|
|
|
|
size = get_read_list_size(tvb, max_offset, offset);
|
|
if (!size)
|
|
return 0;
|
|
offset += size;
|
|
|
|
size = get_write_list_size(tvb, max_offset, offset);
|
|
if (!size)
|
|
return 0;
|
|
offset += size;
|
|
|
|
size = get_reply_chunk_size(tvb, max_offset, offset);
|
|
if (!size)
|
|
return 0;
|
|
offset += size;
|
|
|
|
return offset - start;
|
|
}
|
|
|
|
/*
|
|
* Return the total number of bytes for the given RDMA chunk list
|
|
* Returns 0 when called on an RPC call message because that is where the
|
|
* segments are set up. On an RPC reply message the total number of bytes
|
|
* added to the reassembly table is returned. This is only valid for RDMA
|
|
* writes since there is no RPC-over-RDMA layer for RDMA reads on an RPC reply.
|
|
*/
|
|
static guint
|
|
get_rdma_list_size(wmem_array_t *p_list, packet_info *pinfo)
|
|
{
|
|
guint i, j, size = 0;
|
|
guint32 *p_size;
|
|
rdma_chunk_t *p_rdma_chunk;
|
|
rdma_segment_t *p_rdma_segment;
|
|
segment_info_t *p_segment_info;
|
|
rdma_conv_info_t *p_rdma_conv_info;
|
|
|
|
if (p_list) {
|
|
/* Get size from cache */
|
|
p_size = (guint32 *)p_get_proto_data(wmem_file_scope(), pinfo, proto_rpcordma, RPCRDMA_WRITE_SIZE);
|
|
if (p_size) {
|
|
return *p_size;
|
|
}
|
|
/* Get conversation state */
|
|
p_rdma_conv_info = get_rdma_conv_info(pinfo);
|
|
for (i=0; i<wmem_array_get_count(p_list); i++) {
|
|
p_rdma_chunk = (rdma_chunk_t *)wmem_array_index(p_list, i);
|
|
for (j=0; j<wmem_array_get_count(p_rdma_chunk->segments); j++) {
|
|
p_rdma_segment = (rdma_segment_t *)wmem_array_index(p_rdma_chunk->segments, j);
|
|
p_segment_info = find_segment_info(p_rdma_conv_info, p_rdma_segment->handle, p_rdma_segment->offset);
|
|
if (p_segment_info) {
|
|
size += p_segment_info->rbytes;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (size > 0) {
|
|
/* Save size on the proto data cache */
|
|
p_size = wmem_new(wmem_file_scope(), guint32);
|
|
*p_size = size;
|
|
p_add_proto_data(wmem_file_scope(), pinfo, proto_rpcordma, RPCRDMA_WRITE_SIZE, p_size);
|
|
}
|
|
return size;
|
|
}
|
|
|
|
/* Process an RDMA chunk list (read, write or reply) */
|
|
static tvbuff_t *
|
|
process_rdma_list(tvbuff_t *tvb, guint offset, wmem_array_t *p_list,
|
|
packet_info *pinfo, proto_tree *tree)
|
|
{
|
|
guint i, j, size;
|
|
guint32 msgid = 0;
|
|
guint32 xdrpos = 0;
|
|
guint32 xdrprev = 0;
|
|
guint32 lenprev = 0;
|
|
guint32 msg_num = 0;
|
|
guint32 msg_off = 0;
|
|
guint *p_offset = NULL;
|
|
tvbuff_t *tmp_tvb;
|
|
tvbuff_t *new_tvb = NULL;
|
|
fragment_head *fd_head;
|
|
rdma_segment_t *p_rdma_segment;
|
|
rdma_chunk_t *p_rdma_chunk = NULL;
|
|
segment_info_t *p_segment_info = NULL;
|
|
gboolean setup = FALSE;
|
|
wmem_list_t *msgid_segments = NULL;
|
|
rdma_conv_info_t *p_rdma_conv_info;
|
|
|
|
if (p_list) {
|
|
/* Get conversation state */
|
|
p_rdma_conv_info = get_rdma_conv_info(pinfo);
|
|
|
|
for (i=0; i<wmem_array_get_count(p_list); i++) {
|
|
p_rdma_chunk = (rdma_chunk_t *)wmem_array_index(p_list, i);
|
|
p_rdma_chunk->length = 0;
|
|
p_offset = NULL;
|
|
|
|
if (p_rdma_chunk->type == RDMA_WRITE_CHUNK) {
|
|
/* Process any write chunk offsets from reduced message */
|
|
if (gp_rdma_write_offsets && wmem_array_get_count(gp_rdma_write_offsets) == wmem_array_get_count(p_list)) {
|
|
p_offset = (guint *)wmem_array_index(gp_rdma_write_offsets, i);
|
|
/* Convert reduced offset to xdr position */
|
|
xdrpos = tvb_reported_length_remaining(tvb, offset) - *p_offset + msg_off;
|
|
}
|
|
}
|
|
|
|
for (j=0; j<wmem_array_get_count(p_rdma_chunk->segments); j++) {
|
|
p_rdma_segment = (rdma_segment_t *)wmem_array_index(p_rdma_chunk->segments, j);
|
|
if (p_rdma_chunk->type == RDMA_READ_CHUNK) {
|
|
xdrpos = p_rdma_segment->xdrpos;
|
|
}
|
|
p_segment_info = find_segment_info(p_rdma_conv_info, p_rdma_segment->handle, p_rdma_segment->offset);
|
|
if (p_segment_info) {
|
|
/* This must be the reply, change segment size */
|
|
p_segment_info->length = p_rdma_segment->length;
|
|
} else {
|
|
if (msgid == 0) {
|
|
/* Create new message ID */
|
|
msgid = get_msg_id();
|
|
msgid_segments = wmem_list_new(wmem_file_scope());
|
|
wmem_tree_insert32(p_rdma_conv_info->msgid_list, msgid, msgid_segments);
|
|
}
|
|
/* Create new segment info */
|
|
p_segment_info = wmem_new(wmem_file_scope(), segment_info_t);
|
|
p_segment_info->handle = p_rdma_segment->handle;
|
|
p_segment_info->length = p_rdma_segment->length;
|
|
p_segment_info->offset = p_rdma_segment->offset;
|
|
p_segment_info->msgid = msgid;
|
|
p_segment_info->msgno = p_rdma_chunk->length;
|
|
p_segment_info->type = p_rdma_chunk->type;
|
|
p_segment_info->xdrpos = xdrpos;
|
|
p_segment_info->rbytes = 0;
|
|
/* Add segment to the list of segments */
|
|
wmem_tree_insert32(p_rdma_conv_info->segment_list, p_rdma_segment->handle, p_segment_info);
|
|
wmem_list_append(msgid_segments, p_segment_info);
|
|
setup = TRUE;
|
|
}
|
|
/* Calculate the number of bytes for the whole chunk */
|
|
p_rdma_chunk->length += p_rdma_segment->length;
|
|
}
|
|
|
|
/* Add chunk length to correctly calculate xdrpos */
|
|
msg_off += p_rdma_chunk->length;
|
|
|
|
/*
|
|
* Add reduced data before each chunk data for either the
|
|
* read chunk or write chunk (p_offset != NULL)
|
|
*/
|
|
if (p_rdma_chunk->type == RDMA_READ_CHUNK || p_offset) {
|
|
/*
|
|
* Payload data in this frame (e.g., two chunks)
|
|
* where chunk data is sent separately using RDMA:
|
|
* +----------------+----------------+----------------+
|
|
* | xdrdata1 | xdrdata2 | xdrdata3 |
|
|
* +----------------+----------------+----------------+
|
|
* chunk data1 --^ chunk data2 --^
|
|
*
|
|
* Reassembled message should look like the following in which
|
|
* the xdrpos specifies where the chunk data must be inserted.
|
|
* The xdrpos is relative to the reassembled message and NOT
|
|
* relative to the reduced data (data in this frame):
|
|
* +----------+-------------+----------+-------------+----------+
|
|
* | xdrdata1 | chunk data1 | xdrdata2 | chunk data2 | xdrdata3 |
|
|
* +----------+-------------+----------+-------------+----------+
|
|
* xdrpos1 ---^ xdrpos2 --^
|
|
*/
|
|
|
|
/* Add data before the xdr position */
|
|
size = xdrpos - xdrprev - lenprev;
|
|
if (size > 0 && tvb_captured_length_remaining(tvb, offset) > 0 && p_segment_info) {
|
|
tmp_tvb = tvb_new_subset_length(tvb, offset, size);
|
|
add_fragment(tmp_tvb, 0, p_segment_info->msgid, msg_num, TRUE, p_rdma_conv_info, pinfo, tree);
|
|
/* Message number for fragment after read/write chunk */
|
|
msg_num += p_rdma_chunk->length;
|
|
/* Save rest of data for next fragment */
|
|
tvb = tvb_new_subset_remaining(tvb, offset+size);
|
|
offset = 0;
|
|
}
|
|
|
|
xdrprev = xdrpos;
|
|
lenprev = p_rdma_chunk->length;
|
|
}
|
|
}
|
|
|
|
fd_head = get_fragment_head(pinfo);
|
|
if (fd_head == NULL) {
|
|
if (p_segment_info == NULL) {
|
|
return NULL;
|
|
} else if (p_rdma_chunk->type == RDMA_REPLY_CHUNK && !setup &&
|
|
!pinfo->fd->visited && p_rdma_chunk->length > 0) {
|
|
/* Only reassemble if reply chunk size is non-zero to avoid
|
|
* reassembly of a single fragment. The RPC-over-RDMA reply
|
|
* has no data when the reply chunk size is non-zero but it
|
|
* needs to reassemble all fragments (more_frags = FALSE)
|
|
* in this frame. On the other hand when the reply chunk
|
|
* size is zero, the whole message is given in this frame
|
|
* therefore there is no need to reassemble. */
|
|
new_tvb = add_fragment(tvb, offset, p_segment_info->msgid, 0, FALSE, p_rdma_conv_info, pinfo, tree);
|
|
} else if (p_rdma_chunk->type == RDMA_READ_CHUNK && tvb_captured_length_remaining(tvb, offset) > 0) {
|
|
/* Add data after the last read chunk */
|
|
add_fragment(tvb, offset, p_segment_info->msgid, msg_num, TRUE, p_rdma_conv_info, pinfo, tree);
|
|
} else if (p_offset && tvb_reported_length_remaining(tvb, offset) > 0) {
|
|
/* Add data after the last write chunk */
|
|
new_tvb = add_fragment(tvb, offset, p_segment_info->msgid, msg_num, TRUE, p_rdma_conv_info, pinfo, tree);
|
|
}
|
|
}
|
|
}
|
|
|
|
return new_tvb;
|
|
}
|
|
|
|
/* Process all RDMA chunk lists (read, write and reply) */
|
|
static tvbuff_t *
|
|
process_rdma_lists(tvbuff_t *tvb, guint offset, rdma_lists_t *rdma_lists,
|
|
packet_info *pinfo, proto_tree *tree)
|
|
{
|
|
tvbuff_t *new_tvb;
|
|
tvbuff_t *ret_tvb;
|
|
|
|
new_tvb = get_reassembled_data(tvb, offset, pinfo, tree);
|
|
if (new_tvb) {
|
|
/* Reassembled message has already been cached */
|
|
return new_tvb;
|
|
}
|
|
|
|
/*
|
|
* Reassembly is not done here, process the rdma list to set up the
|
|
* expected read chunks and their respective segments
|
|
* Reassembly is done on the last read response
|
|
* - Used for a large RPC call which has at least one large opaque,
|
|
* e.g., NFS WRITE
|
|
* - The RPC call packet is used only to set up the RDMA read chunk list.
|
|
* It also has the reduced message data which includes the first fragment
|
|
* (XDR data up to and including the opaque length), but it could also
|
|
* have fragments between each read chunk and the last fragment after
|
|
* the last read chunk data. The reduced message is then broken down
|
|
* into fragments and inserted into the reassembly table.
|
|
* - The opaque data is transferred via RDMA reads, once all fragments are
|
|
* accounted for they are reassembled and the whole RPC call is dissected
|
|
* in the last read response -- there is no RPCoRDMA layer
|
|
*
|
|
* - Packet sent order, the reduced RPC call is sent first, then the RDMA
|
|
* reads, e.g., showing only for a single chunk:
|
|
* +----------------+-------------+-----------+-----------+-----+-----------+
|
|
* | WRITE call XDR | opaque size | GETATTR | RDMA read | ... | RDMA read |
|
|
* +----------------+-------------+-----------+-----------+-----+-----------+
|
|
* |<-------------- First frame ------------->|<-------- chunk data ------->|
|
|
* Each RDMA read could be a single RDMA_READ_RESPONSE_ONLY or a series of
|
|
* RDMA_READ_RESPONSE_FIRST, RDMA_READ_RESPONSE_MIDDLE, ...,
|
|
* RDMA_READ_RESPONSE_LAST
|
|
*
|
|
* - NFS WRITE call, this is how it should be reassembled:
|
|
* +----------------+-------------+-----------+-----+-----------+-----------+
|
|
* | WRITE call XDR | opaque size | RDMA read | ... | RDMA read | GETATTR |
|
|
* +----------------+-------------+-----------+-----+-----------+-----------+
|
|
* |<--- opaque (chunk) data --->|
|
|
*/
|
|
process_rdma_list(tvb, offset, rdma_lists->p_read_list, pinfo, tree);
|
|
|
|
/*
|
|
* Reassembly is done on the reply message (RDMA_NOMSG)
|
|
* Process the rdma list on the call message to set up the reply
|
|
* chunk and its respective segments expected by the reply
|
|
* - Used for a large RPC reply which does not fit into a single SEND
|
|
* operation and does not have a single large opaque, e.g., NFS READDIR
|
|
* - The RPC call packet is used only to set up the RDMA reply chunk list
|
|
* - The whole RPC reply is transferred via RDMA writes
|
|
* - The RPC reply packet has no data (RDMA_NOMSG) but fragments are
|
|
* reassembled and the whole RPC reply is dissected
|
|
*
|
|
* - Packet sent order, this is the whole XDR data for the RPC reply:
|
|
* +--------------------------+------------------+--------------------------+
|
|
* | RDMA write | ... | RDMA write |
|
|
* +--------------------------+------------------+--------------------------+
|
|
* Each RDMA write could be a single RDMA_WRITE_ONLY or a series of
|
|
* RDMA_WRITE_FIRST, RDMA_WRITE_MIDDLE, ..., RDMA_WRITE_LAST
|
|
*/
|
|
new_tvb = process_rdma_list(tvb, offset, rdma_lists->p_reply_list, pinfo, tree);
|
|
|
|
/*
|
|
* Reassembly is done on the reply message (RDMA_MSG)
|
|
* Process the rdma list on the call message to set up the write
|
|
* chunks and their respective segments expected by the reply
|
|
* - Used for a large RPC reply which has at least one large opaque,
|
|
* e.g., NFS READ
|
|
* - The RPC call packet is used only to set up the RDMA write chunk list
|
|
* - The opaque data is transferred via RDMA writes
|
|
* - The RPC reply packet has the reduced message data which includes the
|
|
* first fragment (XDR data up to and including the opaque length), but
|
|
* it could also have fragments between each write chunk and the last
|
|
* fragment after the last write chunk data. The reduced message is
|
|
* then broken down into fragments and inserted into the reassembly table.
|
|
* Fragments are then reassembled and the whole RPC reply is dissected
|
|
* - Packet sent order, the RDMA writes are sent first, then the reduced RPC
|
|
* reply, e.g., showing only for a single chunk:
|
|
* +------------+-----+------------+----------------+-------------+---------+
|
|
* | RDMA write | ... | RDMA write | READ reply XDR | opaque size | GETATTR |
|
|
* +------------+-----+------------+----------------+-------------+---------+
|
|
* |<-------- write chunk -------->|<------------- Last frame ------------->|
|
|
* Each RDMA write could be a single RDMA_WRITE_ONLY or a series of
|
|
* RDMA_WRITE_FIRST, RDMA_WRITE_MIDDLE, ..., RDMA_WRITE_LAST
|
|
*
|
|
* - NFS READ reply, this is how it should be reassembled:
|
|
* +----------------+-------------+------------+-----+------------+---------+
|
|
* | READ reply XDR | opaque size | RDMA write | ... | RDMA write | GETATTR |
|
|
* +----------------+-------------+------------+-----+------------+---------+
|
|
* |<---- opaque (chunk) data ---->|
|
|
*/
|
|
ret_tvb = process_rdma_list(tvb, offset, rdma_lists->p_write_list, pinfo, tree);
|
|
|
|
/*
|
|
* Either the reply chunk or the write chunks should be reassembled here
|
|
* but not both
|
|
*/
|
|
new_tvb = (new_tvb && ret_tvb) ? NULL : (ret_tvb ? ret_tvb : new_tvb);
|
|
|
|
return new_tvb;
|
|
}
|
|
|
|
/*
|
|
* Add a fragment to the SEND reassembly table and return the reassembled data
|
|
* if all fragments have been added
|
|
*/
|
|
static tvbuff_t *add_send_fragment(rdma_conv_info_t *p_rdma_conv_info,
|
|
tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
|
{
|
|
guint32 msgid = 0;
|
|
gint32 msgno = -1;
|
|
tvbuff_t *new_tvb = NULL;
|
|
gboolean first_frag = FALSE;
|
|
gboolean middle_frag = FALSE;
|
|
gboolean last_frag = FALSE;
|
|
send_info_t *p_send_info = NULL;
|
|
|
|
if (gp_infiniband_info) {
|
|
first_frag = gp_infiniband_info->opCode == RC_SEND_FIRST;
|
|
middle_frag = gp_infiniband_info->opCode == RC_SEND_MIDDLE;
|
|
last_frag = (gp_infiniband_info->opCode == RC_SEND_LAST || \
|
|
gp_infiniband_info->opCode == RC_SEND_LAST_INVAL);
|
|
} else if (gp_rdmap_info) {
|
|
first_frag = !gp_rdmap_info->last_flag && gp_rdmap_info->message_offset == 0;
|
|
middle_frag = !gp_rdmap_info->last_flag && gp_rdmap_info->message_offset > 0;
|
|
last_frag = gp_rdmap_info->last_flag && gp_rdmap_info->message_offset > 0;
|
|
}
|
|
|
|
if (!first_frag && !middle_frag && !last_frag) {
|
|
/* Only one SEND fragment, no need to reassemble */
|
|
return tvb;
|
|
} else if (pinfo->fd->visited) {
|
|
return get_reassembled_data(tvb, 0, pinfo, tree);
|
|
} else if (first_frag) {
|
|
/* Start of multi-SEND message */
|
|
p_send_info = wmem_new(wmem_file_scope(), send_info_t);
|
|
p_send_info->msgid = get_msg_id();
|
|
p_send_info->rsize = 0;
|
|
|
|
if (gp_infiniband_info) {
|
|
/* Message numbers are relative with respect to current PSN */
|
|
p_send_info->msgno = gp_infiniband_info->packet_seq_num;
|
|
wmem_tree_insert32(p_rdma_conv_info->send_list, gp_infiniband_info->packet_seq_num, p_send_info);
|
|
} else if (gp_rdmap_info) {
|
|
/* Message numbers are given by the RDMAP offset -- msgno is not used */
|
|
p_send_info->msgno = 0;
|
|
wmem_tree_insert32(p_rdma_conv_info->msn_list, gp_rdmap_info->message_seq_num, p_send_info);
|
|
}
|
|
} else {
|
|
/* SEND fragment, get the send reassembly info structure */
|
|
if (gp_infiniband_info) {
|
|
p_send_info = wmem_tree_lookup32_le(p_rdma_conv_info->send_list, gp_infiniband_info->packet_seq_num);
|
|
} else if (gp_rdmap_info) {
|
|
p_send_info = wmem_tree_lookup32(p_rdma_conv_info->msn_list, gp_rdmap_info->message_seq_num);
|
|
}
|
|
}
|
|
if (p_send_info) {
|
|
p_send_info->rsize += tvb_reported_length(tvb);
|
|
msgid = p_send_info->msgid;
|
|
if (gp_infiniband_info) {
|
|
/* Message numbers are consecutive starting at zero */
|
|
msgno = gp_infiniband_info->packet_seq_num - p_send_info->msgno;
|
|
} else if (gp_rdmap_info) {
|
|
/* Message numbers are given by the RDMAP offset */
|
|
msgno = gp_rdmap_info->message_offset;
|
|
}
|
|
}
|
|
if (msgid > 0 && msgno >= 0) {
|
|
new_tvb = add_fragment(tvb, 0, msgid, msgno, !last_frag, p_rdma_conv_info, pinfo, tree);
|
|
if (last_frag && !new_tvb && gp_rdmap_info) {
|
|
/* Since message numbers are not consecutive for iWarp,
|
|
* verify there are no missing fragments */
|
|
if (p_send_info->rsize == msgno + tvb_reported_length(tvb)) {
|
|
end_reassembly(msgid, NULL, pinfo);
|
|
new_tvb = get_reassembled_data(tvb, 0, pinfo, tree);
|
|
}
|
|
}
|
|
}
|
|
if (new_tvb) {
|
|
/* This is the last fragment, data has been reassembled
|
|
* and ready to be dissected */
|
|
return new_tvb;
|
|
}
|
|
return tvb;
|
|
}
|
|
|
|
/*
|
|
* We need to differentiate between RPC messages inside RDMA and regular send messages.
|
|
* In order to do that (as well as extra validation) we want to verify that for RDMA_MSG
|
|
* and RDMA_MSGP types, RPC call or RPC reply header follows. We can do this by comparing
|
|
* XID in RPC and RPCoRDMA headers.
|
|
*/
|
|
static gboolean
|
|
packet_is_rpcordma(tvbuff_t *tvb)
|
|
{
|
|
guint size, len = tvb_reported_length(tvb);
|
|
guint32 xid_rpc;
|
|
guint32 xid = tvb_get_ntohl(tvb, 0);
|
|
guint32 msg_type = tvb_get_ntohl(tvb, 12);
|
|
guint offset;
|
|
|
|
if (len < MIN_RPCRDMA_HDR_SZ)
|
|
return 0;
|
|
|
|
switch (msg_type) {
|
|
case RDMA_MSG:
|
|
if (len < MIN_RPCRDMA_MSG_SZ)
|
|
return FALSE;
|
|
offset = MIN_RPCRDMA_HDR_SZ;
|
|
size = get_chunk_lists_size(tvb, len, offset);
|
|
if (!size)
|
|
return FALSE;
|
|
offset += size;
|
|
|
|
if (offset + 4 > len)
|
|
return FALSE;
|
|
xid_rpc = tvb_get_ntohl(tvb, offset);
|
|
if (xid != xid_rpc)
|
|
return FALSE;
|
|
break;
|
|
|
|
case RDMA_MSGP:
|
|
if (len < MIN_RPCRDMA_MSGP_SZ)
|
|
return FALSE;
|
|
offset = MIN_RPCRDMA_HDR_SZ + 8;
|
|
size = get_chunk_lists_size(tvb, len, offset);
|
|
if (!size)
|
|
return FALSE;
|
|
offset += size;
|
|
|
|
if (offset + 4 > len)
|
|
return FALSE;
|
|
xid_rpc = tvb_get_ntohl(tvb, offset);
|
|
if (xid != xid_rpc)
|
|
return FALSE;
|
|
break;
|
|
|
|
case RDMA_NOMSG:
|
|
case RDMA_DONE:
|
|
case RDMA_ERROR:
|
|
break;
|
|
|
|
default:
|
|
return FALSE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static int
|
|
dissect_rpcrdma(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
|
|
{
|
|
tvbuff_t *volatile next_tvb;
|
|
tvbuff_t *frag_tvb;
|
|
proto_item *ti;
|
|
proto_tree *rpcordma_tree;
|
|
guint offset;
|
|
guint32 msg_type;
|
|
guint32 xid;
|
|
guint32 val;
|
|
guint32 *p_msgid;
|
|
guint write_size;
|
|
int save_visited;
|
|
rdma_lists_t rdma_lists = { NULL, NULL, NULL };
|
|
|
|
/* tvb_get_ntohl() should not throw an exception while checking if
|
|
this is an rpcrdma packet */
|
|
if (tvb_captured_length(tvb) < MIN_RPCRDMA_HDR_SZ)
|
|
return 0;
|
|
|
|
if (tvb_get_ntohl(tvb, 4) != 1) /* vers */
|
|
return 0;
|
|
|
|
xid = tvb_get_ntohl(tvb, 0);
|
|
msg_type = tvb_get_ntohl(tvb, 12);
|
|
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "RPCoRDMA");
|
|
col_add_fstr(pinfo->cinfo, COL_INFO, "%s XID 0x%x",
|
|
val_to_str(msg_type, rpcordma_message_type, "Unknown (%d)"), xid);
|
|
|
|
ti = proto_tree_add_item(tree, proto_rpcordma, tvb, 0, MIN_RPCRDMA_HDR_SZ, ENC_NA);
|
|
|
|
rpcordma_tree = proto_item_add_subtree(ti, ett_rpcordma);
|
|
|
|
offset = 0;
|
|
proto_tree_add_item(rpcordma_tree, hf_rpcordma_xid, tvb,
|
|
offset, 4, ENC_BIG_ENDIAN);
|
|
offset += 4;
|
|
proto_tree_add_item(rpcordma_tree, hf_rpcordma_vers, tvb,
|
|
offset, 4, ENC_BIG_ENDIAN);
|
|
offset += 4;
|
|
proto_tree_add_item(rpcordma_tree, hf_rpcordma_flow_control, tvb,
|
|
offset, 4, ENC_BIG_ENDIAN);
|
|
offset += 4;
|
|
proto_tree_add_item(rpcordma_tree, hf_rpcordma_message_type, tvb,
|
|
offset, 4, ENC_BIG_ENDIAN);
|
|
offset += 4;
|
|
|
|
switch (msg_type) {
|
|
case RDMA_MSG:
|
|
/* Parse rpc_rdma_header */
|
|
offset = parse_rdma_header(tvb, offset, rpcordma_tree, &rdma_lists);
|
|
|
|
proto_item_set_len(ti, offset);
|
|
|
|
frag_tvb = get_reassembled_data(tvb, offset, pinfo, tree);
|
|
if (frag_tvb) {
|
|
/* Reassembled message has already been cached -- call upper dissector */
|
|
return call_dissector(rpc_handler, frag_tvb, pinfo, tree);
|
|
} else if (pinfo->fd->visited && !g_needs_reassembly && rdma_lists.p_read_list) {
|
|
/* This frame has already been added as a read fragment */
|
|
return 0;
|
|
} else {
|
|
next_tvb = tvb_new_subset_remaining(tvb, offset);
|
|
|
|
/*
|
|
* Get the total number of bytes for the write chunk list.
|
|
* It returns 0 if there is no write chunk list, or this is an
|
|
* RPC call (list has just been set up) or it is an RPC reply but
|
|
* there is an error so the reply message has not been reduced.
|
|
*/
|
|
write_size = get_rdma_list_size(rdma_lists.p_write_list, pinfo);
|
|
|
|
if (write_size > 0 && !pinfo->fd->visited) {
|
|
/* Initialize array of write chunk offsets */
|
|
gp_rdma_write_offsets = wmem_array_new(wmem_packet_scope(), sizeof(gint));
|
|
register_frame_end_routine(pinfo, reset_write_offsets);
|
|
TRY {
|
|
/*
|
|
* Call the upper layer dissector to get a list of offsets
|
|
* where message has been reduced.
|
|
* This is done on the first pass (visited = 0)
|
|
*/
|
|
g_rpcrdma_reduced = TRUE;
|
|
call_dissector(rpc_handler, next_tvb, pinfo, tree);
|
|
}
|
|
FINALLY {
|
|
/* Make sure to disable reduced data processing */
|
|
g_rpcrdma_reduced = FALSE;
|
|
}
|
|
ENDTRY;
|
|
} else if (write_size > 0 && pinfo->fd->visited) {
|
|
/*
|
|
* Reassembly is done on the second pass (visited = 1)
|
|
* This is done because dissecting the upper layer(s) again
|
|
* causes the upper layer(s) to be displayed twice if it is
|
|
* done on the same pass.
|
|
*/
|
|
p_msgid = (guint32 *)p_get_proto_data(wmem_file_scope(), pinfo, proto_rpcordma, RPCRDMA_MSG_ID);
|
|
if (p_msgid) {
|
|
/*
|
|
* All fragments were added during the first pass,
|
|
* reassembly just needs to be completed here
|
|
*/
|
|
save_visited = pinfo->fd->visited;
|
|
pinfo->fd->visited = 0;
|
|
end_reassembly(*p_msgid, NULL, pinfo);
|
|
pinfo->fd->visited = save_visited;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If there is a write chunk list, process_rdma_lists will convert
|
|
* the offsets returned by the upper layer into xdr positions
|
|
* and break the current reduced message into separate fragments
|
|
* and insert them into the reassembly table in the first pass.
|
|
* On the second pass, the reassembly has just been done so
|
|
* process_rdma_lists should only call process_reassembled_data
|
|
* to get the reassembled data and call the dissector for the
|
|
* upper layer with the reassembled message.
|
|
*/
|
|
frag_tvb = process_rdma_lists(next_tvb, 0, &rdma_lists, pinfo, tree);
|
|
gp_rdma_write_offsets = NULL;
|
|
if (rdma_lists.p_read_list) {
|
|
/*
|
|
* If there is a read chunk list, do not dissect upper layer
|
|
* just label rest of packet as "Data" since the reassembly
|
|
* will be done on the last read response.
|
|
*/
|
|
call_data_dissector(next_tvb, pinfo, tree);
|
|
break;
|
|
} else if (frag_tvb) {
|
|
/* Replace current frame data with the reassembled data */
|
|
next_tvb = frag_tvb;
|
|
}
|
|
}
|
|
return call_dissector(rpc_handler, next_tvb, pinfo, tree);
|
|
|
|
case RDMA_NOMSG:
|
|
/* Parse rpc_rdma_header_nomsg */
|
|
offset = parse_rdma_header(tvb, offset, rpcordma_tree, &rdma_lists);
|
|
if (pinfo->fd->visited) {
|
|
/* Reassembly was done on the first pass, so just get the reassembled data */
|
|
next_tvb = get_reassembled_data(tvb, offset, pinfo, tree);
|
|
} else {
|
|
next_tvb = process_rdma_lists(tvb, offset, &rdma_lists, pinfo, tree);
|
|
}
|
|
if (next_tvb) {
|
|
/*
|
|
* Even though there is no data in this frame, reassembly for
|
|
* the reply chunk is done in this frame so dissect upper layer
|
|
*/
|
|
call_dissector(rpc_handler, next_tvb, pinfo, tree);
|
|
}
|
|
break;
|
|
|
|
case RDMA_MSGP:
|
|
/* Parse rpc_rdma_header_padded */
|
|
proto_tree_add_item(rpcordma_tree, hf_rpcordma_rdma_align, tvb,
|
|
offset, 4, ENC_BIG_ENDIAN);
|
|
offset += 4;
|
|
|
|
proto_tree_add_item(rpcordma_tree, hf_rpcordma_rdma_thresh, tvb,
|
|
offset, 4, ENC_BIG_ENDIAN);
|
|
offset += 4;
|
|
|
|
offset = parse_rdma_header(tvb, offset, rpcordma_tree, &rdma_lists);
|
|
|
|
proto_item_set_len(ti, offset);
|
|
next_tvb = tvb_new_subset_remaining(tvb, offset);
|
|
return call_dissector(rpc_handler, next_tvb, pinfo, tree);
|
|
|
|
case RDMA_DONE:
|
|
break;
|
|
|
|
case RDMA_ERROR:
|
|
/* rpc_rdma_errcode */
|
|
val = tvb_get_ntohl(tvb, offset);
|
|
proto_tree_add_item(rpcordma_tree, hf_rpcordma_errcode, tvb,
|
|
offset, 4, ENC_BIG_ENDIAN);
|
|
offset += 4;
|
|
|
|
switch (val) {
|
|
case ERR_VERS:
|
|
proto_tree_add_item(rpcordma_tree, hf_rpcordma_vers_low, tvb,
|
|
offset, 4, ENC_BIG_ENDIAN);
|
|
offset += 4;
|
|
proto_tree_add_item(rpcordma_tree, hf_rpcordma_vers_high, tvb,
|
|
offset, 4, ENC_BIG_ENDIAN);
|
|
offset += 4;
|
|
break;
|
|
|
|
case ERR_CHUNK:
|
|
break;
|
|
|
|
default:
|
|
proto_item_set_len(ti, offset);
|
|
next_tvb = tvb_new_subset_remaining(tvb, offset);
|
|
return call_data_dissector(next_tvb, pinfo, tree);
|
|
}
|
|
break;
|
|
}
|
|
|
|
proto_item_set_len(ti, offset);
|
|
return offset;
|
|
}
|
|
|
|
static gboolean
|
|
dissect_rpcrdma_ib_heur(tvbuff_t *tvb, packet_info *pinfo,
|
|
proto_tree *tree, void *data)
|
|
{
|
|
tvbuff_t *new_tvb = NULL;
|
|
gboolean more_frags = FALSE;
|
|
rdma_conv_info_t *p_rdma_conv_info;
|
|
|
|
/* Initialize global variables for InfiniBand reassembly */
|
|
g_rpcrdma_reduced = FALSE;
|
|
g_needs_reassembly = TRUE;
|
|
gp_rdmap_info = NULL;
|
|
gp_infiniband_info = (struct infinibandinfo *)data;
|
|
|
|
if (!gp_infiniband_info)
|
|
return FALSE;
|
|
|
|
/* Get conversation state */
|
|
p_rdma_conv_info = get_rdma_conv_info(pinfo);
|
|
|
|
switch (gp_infiniband_info->opCode) {
|
|
case RC_SEND_ONLY:
|
|
case RC_SEND_ONLY_INVAL:
|
|
break;
|
|
case RC_SEND_FIRST:
|
|
case RC_SEND_MIDDLE:
|
|
add_send_fragment(p_rdma_conv_info, tvb, pinfo, tree);
|
|
return FALSE;
|
|
case RC_SEND_LAST:
|
|
case RC_SEND_LAST_INVAL:
|
|
tvb = add_send_fragment(p_rdma_conv_info, tvb, pinfo, tree);
|
|
break;
|
|
case RC_RDMA_WRITE_ONLY:
|
|
case RC_RDMA_WRITE_ONLY_IMM:
|
|
set_max_iosize(p_rdma_conv_info, tvb_reported_length(tvb));
|
|
add_ib_fragment(tvb, p_rdma_conv_info, TRUE, pinfo, tree);
|
|
return FALSE;
|
|
case RC_RDMA_WRITE_FIRST:
|
|
set_max_iosize(p_rdma_conv_info, tvb_reported_length(tvb));
|
|
add_request_info(p_rdma_conv_info, pinfo);
|
|
/* fall through */
|
|
case RC_RDMA_WRITE_MIDDLE:
|
|
case RC_RDMA_WRITE_LAST:
|
|
case RC_RDMA_WRITE_LAST_IMM:
|
|
/* Add fragment to the reassembly table */
|
|
add_ib_fragment(tvb, p_rdma_conv_info, FALSE, pinfo, tree);
|
|
/* Do not dissect here, dissection is done on RDMA_MSG or RDMA_NOMSG */
|
|
return FALSE;
|
|
case RC_RDMA_READ_REQUEST:
|
|
add_request_info(p_rdma_conv_info, pinfo);
|
|
return FALSE;
|
|
case RC_RDMA_READ_RESPONSE_FIRST:
|
|
set_max_iosize(p_rdma_conv_info, tvb_reported_length(tvb));
|
|
/* fall through */
|
|
case RC_RDMA_READ_RESPONSE_MIDDLE:
|
|
more_frags = TRUE;
|
|
/* fall through */
|
|
case RC_RDMA_READ_RESPONSE_LAST:
|
|
case RC_RDMA_READ_RESPONSE_ONLY:
|
|
/* Add fragment to the reassembly table */
|
|
new_tvb = add_ib_fragment(tvb, p_rdma_conv_info, FALSE, pinfo, tree);
|
|
if (!new_tvb && !more_frags && p_rdma_conv_info->segment_info) {
|
|
/*
|
|
* Reassembled data has not been cached (new_tvb==NULL) yet,
|
|
* so make sure reassembly is really done if more_frags==FALSE,
|
|
* (for the READ_RESPONSE_LAST or ONLY case).
|
|
* Do not add any more data, just complete the reassembly
|
|
*/
|
|
end_reassembly(p_rdma_conv_info->segment_info->msgid, p_rdma_conv_info, pinfo);
|
|
new_tvb = get_reassembled_data(tvb, 0, pinfo, tree);
|
|
}
|
|
if (new_tvb) {
|
|
/* This is the last fragment, data has been reassembled and ready to dissect */
|
|
return call_dissector(rpc_handler, new_tvb, pinfo, tree);
|
|
}
|
|
return FALSE;
|
|
default:
|
|
return FALSE;
|
|
}
|
|
|
|
if (!packet_is_rpcordma(tvb))
|
|
return FALSE;
|
|
dissect_rpcrdma(tvb, pinfo, tree, NULL);
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
dissect_rpcrdma_iwarp_heur(tvbuff_t *tvb, packet_info *pinfo,
|
|
proto_tree *tree, void *data)
|
|
{
|
|
tvbuff_t *new_tvb;
|
|
rdma_conv_info_t *p_rdma_conv_info;
|
|
rdmap_request_t *p_read_request;
|
|
|
|
/* Initialize global variables for iWarp reassembly */
|
|
g_rpcrdma_reduced = FALSE;
|
|
g_needs_reassembly = TRUE;
|
|
gp_infiniband_info = NULL;
|
|
gp_rdmap_info = (rdmap_info_t *)data;
|
|
|
|
if (!gp_rdmap_info)
|
|
return FALSE;
|
|
|
|
/* Get conversation state */
|
|
p_rdma_conv_info = get_rdma_conv_info(pinfo);
|
|
|
|
switch (gp_rdmap_info->opcode) {
|
|
case RDMA_SEND:
|
|
case RDMA_SEND_INVALIDATE:
|
|
tvb = add_send_fragment(p_rdma_conv_info, tvb, pinfo, tree);
|
|
if (!gp_rdmap_info->last_flag) {
|
|
/* This is a SEND fragment, do not dissect yet */
|
|
return FALSE;
|
|
}
|
|
break;
|
|
case RDMA_WRITE:
|
|
add_iwarp_fragment(tvb, p_rdma_conv_info, pinfo, tree);
|
|
/* Do not dissect here, dissection is done on RDMA_MSG or RDMA_NOMSG */
|
|
return FALSE;
|
|
case RDMA_READ_REQUEST:
|
|
if (!pinfo->fd->visited && gp_rdmap_info->read_request) {
|
|
p_read_request = wmem_new(wmem_file_scope(), rdmap_request_t);
|
|
memcpy(p_read_request, gp_rdmap_info->read_request, sizeof(rdmap_request_t));
|
|
wmem_tree_insert32(p_rdma_conv_info->request_list, gp_rdmap_info->read_request->sink_stag, p_read_request);
|
|
}
|
|
return FALSE;
|
|
case RDMA_READ_RESPONSE:
|
|
new_tvb = add_iwarp_fragment(tvb, p_rdma_conv_info, pinfo, tree);
|
|
if (new_tvb) {
|
|
/* This is the last fragment, data has been reassembled and ready to dissect */
|
|
return call_dissector(rpc_handler, new_tvb, pinfo, tree);
|
|
}
|
|
return FALSE;
|
|
default:
|
|
return FALSE;
|
|
}
|
|
|
|
if (!packet_is_rpcordma(tvb))
|
|
return FALSE;
|
|
|
|
dissect_rpcrdma(tvb, pinfo, tree, NULL);
|
|
return TRUE;
|
|
}
|
|
|
|
void
|
|
proto_register_rpcordma(void)
|
|
{
|
|
module_t *rpcordma_module;
|
|
static hf_register_info hf[] = {
|
|
{ &hf_rpcordma_xid,
|
|
{ "XID", "rpcordma.xid",
|
|
FT_UINT32, BASE_HEX,
|
|
NULL, 0x0, NULL, HFILL}
|
|
},
|
|
{ &hf_rpcordma_vers,
|
|
{ "Version", "rpcordma.version",
|
|
FT_UINT32, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL}
|
|
},
|
|
{ &hf_rpcordma_flow_control,
|
|
{ "Flow Control", "rpcordma.flow_control",
|
|
FT_UINT32, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL}
|
|
},
|
|
{ &hf_rpcordma_message_type,
|
|
{ "Message Type", "rpcordma.msg_type",
|
|
FT_UINT32, BASE_DEC,
|
|
VALS(rpcordma_message_type), 0x0, NULL, HFILL}
|
|
},
|
|
{ &hf_rpcordma_reads_count,
|
|
{ "Read list", "rpcordma.reads_count",
|
|
FT_UINT32, BASE_DEC,
|
|
NULL, 0, NULL, HFILL }
|
|
},
|
|
{ &hf_rpcordma_writes_count,
|
|
{ "Write list", "rpcordma.writes_count",
|
|
FT_UINT32, BASE_DEC,
|
|
NULL, 0, NULL, HFILL }
|
|
},
|
|
{ &hf_rpcordma_reply_count,
|
|
{ "Reply list", "rpcordma.reply_count",
|
|
FT_UINT32, BASE_DEC,
|
|
NULL, 0, NULL, HFILL }
|
|
},
|
|
{ &hf_rpcordma_rdma_handle,
|
|
{ "RDMA handle", "rpcordma.rdma_handle",
|
|
FT_UINT32, BASE_HEX,
|
|
NULL, 0, NULL, HFILL }
|
|
},
|
|
{ &hf_rpcordma_rdma_length,
|
|
{ "RDMA length", "rpcordma.rdma_length",
|
|
FT_UINT32, BASE_DEC,
|
|
NULL, 0, NULL, HFILL }
|
|
},
|
|
{ &hf_rpcordma_rdma_offset,
|
|
{ "RDMA offset", "rpcordma.rdma_offset",
|
|
FT_UINT64, BASE_HEX,
|
|
NULL, 0, NULL, HFILL }
|
|
},
|
|
{ &hf_rpcordma_position,
|
|
{ "Position in XDR", "rpcordma.position",
|
|
FT_UINT32, BASE_DEC,
|
|
NULL, 0, NULL, HFILL }
|
|
},
|
|
{ &hf_rpcordma_segment_count,
|
|
{ "Write chunk segment count", "rpcordma.segment_count",
|
|
FT_UINT32, BASE_DEC,
|
|
NULL, 0, NULL, HFILL }
|
|
},
|
|
{ &hf_rpcordma_rdma_align,
|
|
{ "RDMA align", "rpcordma.rdma_align",
|
|
FT_UINT32, BASE_DEC,
|
|
NULL, 0, NULL, HFILL }
|
|
},
|
|
{ &hf_rpcordma_rdma_thresh,
|
|
{ "RDMA threshold", "rpcordma.rdma_thresh",
|
|
FT_UINT32, BASE_DEC,
|
|
NULL, 0, NULL, HFILL }
|
|
},
|
|
{ &hf_rpcordma_errcode,
|
|
{ "Error code", "rpcordma.errcode",
|
|
FT_UINT32, BASE_DEC,
|
|
VALS(rpcordma_err), 0, NULL, HFILL }
|
|
},
|
|
{ &hf_rpcordma_vers_low,
|
|
{ "Version low", "rpcordma.vers_low",
|
|
FT_UINT32, BASE_DEC,
|
|
NULL, 0, NULL, HFILL }
|
|
},
|
|
{ &hf_rpcordma_vers_high,
|
|
{ "Version high", "rpcordma.vers_high",
|
|
FT_UINT32, BASE_DEC,
|
|
NULL, 0, NULL, HFILL }
|
|
},
|
|
/* Fragment entries */
|
|
{ &hf_rpcordma_fragments,
|
|
{ "Reassembled RPCoRDMA fragments", "rpcordma.fragments",
|
|
FT_NONE, BASE_NONE, NULL, 0x00, NULL, HFILL}
|
|
},
|
|
{ &hf_rpcordma_fragment,
|
|
{ "RPCoRDMA fragment", "rpcordma.fragment",
|
|
FT_FRAMENUM, BASE_NONE, NULL, 0x00, NULL, HFILL}
|
|
},
|
|
{ &hf_rpcordma_fragment_overlap,
|
|
{ "Fragment overlap", "rpcordma.fragment.overlap",
|
|
FT_BOOLEAN, 0, NULL, 0x00, NULL, HFILL}
|
|
},
|
|
{ &hf_rpcordma_fragment_overlap_conflicts,
|
|
{ "Fragment overlapping with conflicting data", "rpcordma.fragment.overlap.conflicts",
|
|
FT_BOOLEAN, 0, NULL, 0x00, NULL, HFILL}
|
|
},
|
|
{ &hf_rpcordma_fragment_multiple_tails,
|
|
{ "Multiple tail fragments found", "rpcordma.fragment.multiple_tails",
|
|
FT_BOOLEAN, 0, NULL, 0x00, NULL, HFILL}
|
|
},
|
|
{ &hf_rpcordma_fragment_too_long_fragment,
|
|
{ "Fragment too long", "rpcordma.fragment.too_long_fragment",
|
|
FT_BOOLEAN, 0, NULL, 0x00, NULL, HFILL}
|
|
},
|
|
{ &hf_rpcordma_fragment_error,
|
|
{ "Defragmentation error", "rpcordma.fragment.error",
|
|
FT_FRAMENUM, BASE_NONE, NULL, 0x00, NULL, HFILL}
|
|
},
|
|
{ &hf_rpcordma_fragment_count,
|
|
{ "Fragment count", "rpcordma.fragment.count",
|
|
FT_UINT32, BASE_DEC, NULL, 0x00, NULL, HFILL}
|
|
},
|
|
{ &hf_rpcordma_reassembled_in,
|
|
{ "Reassembled PDU in frame", "rpcordma.reassembled.in",
|
|
FT_FRAMENUM, BASE_NONE, NULL, 0x00, NULL, HFILL}
|
|
},
|
|
{ &hf_rpcordma_reassembled_length,
|
|
{ "Reassembled RPCoRDMA length", "rpcordma.reassembled.length",
|
|
FT_UINT32, BASE_DEC, NULL, 0x00, NULL, HFILL}
|
|
},
|
|
{ &hf_rpcordma_reassembled_data,
|
|
{ "Reassembled RPCoRDMA data", "rpcordma.reassembled.data",
|
|
FT_BYTES, BASE_NONE, NULL, 0, NULL, HFILL }
|
|
},
|
|
};
|
|
|
|
static gint *ett[] = {
|
|
&ett_rpcordma,
|
|
&ett_rpcordma_chunk,
|
|
&ett_rpcordma_read_list,
|
|
&ett_rpcordma_read_chunk,
|
|
&ett_rpcordma_write_list,
|
|
&ett_rpcordma_write_chunk,
|
|
&ett_rpcordma_reply_chunk,
|
|
&ett_rpcordma_segment,
|
|
&ett_rpcordma_fragment,
|
|
&ett_rpcordma_fragments,
|
|
};
|
|
|
|
proto_rpcordma = proto_register_protocol (
|
|
"RPC over RDMA", /* name */
|
|
"RPCoRDMA", /* short name */
|
|
"rpcordma" /* abbrev */
|
|
);
|
|
|
|
proto_register_field_array(proto_rpcordma, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
reassembly_table_register(&rpcordma_reassembly_table, &addresses_ports_reassembly_table_functions);
|
|
|
|
/* Register preferences */
|
|
rpcordma_module = prefs_register_protocol_obsolete(proto_rpcordma);
|
|
|
|
prefs_register_obsolete_preference(rpcordma_module, "manual_en");
|
|
prefs_register_obsolete_preference(rpcordma_module, "addr_a");
|
|
prefs_register_obsolete_preference(rpcordma_module, "addr_a_type");
|
|
prefs_register_obsolete_preference(rpcordma_module, "addr_a_id");
|
|
prefs_register_obsolete_preference(rpcordma_module, "addr_a_qp");
|
|
prefs_register_obsolete_preference(rpcordma_module, "addr_b");
|
|
prefs_register_obsolete_preference(rpcordma_module, "addr_b_type");
|
|
prefs_register_obsolete_preference(rpcordma_module, "addr_b_id");
|
|
prefs_register_obsolete_preference(rpcordma_module, "addr_b_qp");
|
|
prefs_register_obsolete_preference(rpcordma_module, "target_ports");
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_rpcordma(void)
|
|
{
|
|
heur_dissector_add("infiniband.payload", dissect_rpcrdma_ib_heur, "RPC-over-RDMA on Infiniband",
|
|
"rpcrdma_infiniband", proto_rpcordma, HEURISTIC_ENABLE);
|
|
dissector_add_for_decode_as("infiniband", create_dissector_handle( dissect_rpcrdma, proto_rpcordma ) );
|
|
|
|
heur_dissector_add("iwarp_ddp_rdmap", dissect_rpcrdma_iwarp_heur, "RPC-over-RDMA on iWARP",
|
|
"rpcrdma_iwarp", proto_rpcordma, HEURISTIC_ENABLE);
|
|
|
|
rpc_handler = find_dissector_add_dependency("rpc", proto_rpcordma);
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - https://www.wireshark.org/tools/modelines.html
|
|
*
|
|
* Local variables:
|
|
* c-basic-offset: 4
|
|
* tab-width: 8
|
|
* indent-tabs-mode: nil
|
|
* End:
|
|
*
|
|
* vi: set shiftwidth=4 tabstop=8 expandtab:
|
|
* :indentSize=4:tabSize=8:noTabs=true:
|
|
*/
|