diff --git a/include/qemu/rdma.h b/include/qemu/rdma.h
new file mode 100644
index 0000000..2dc2519
--- /dev/null
+++ b/include/qemu/rdma.h
@@ -0,0 +1,281 @@
+/*
+ *  Copyright (C) 2013 Michael R. Hines <mrhines@us.ibm.com>
+ *  Copyright (C) 2013 Jiuxing Liu <jl@us.ibm.com>
+ *
+ *  RDMA data structures and helper functions (for migration)
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; under version 2 of the License.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _RDMA_H
+#define _RDMA_H
+
+#include "config-host.h"
+#ifdef CONFIG_RDMA
+#include <rdma/rdma_cma.h>
+#endif
+#include "monitor/monitor.h"
+
+extern int rdmaport;
+extern char rdmahost[64];
+
+struct rdma_context {
+    /* cm_id also has ibv_conext, rdma_event_channel, and ibv_qp in
+       cm_id->verbs, cm_id->channel, and cm_id->qp. */
+    struct rdma_cm_id *cm_id;
+    struct rdma_cm_id *listen_id;
+
+    struct ibv_context *verbs;
+    struct rdma_event_channel *channel;
+    struct ibv_qp *qp;
+
+    struct ibv_comp_channel *comp_channel;
+    struct ibv_pd *pd;
+    struct ibv_cq *cq;
+};
+
+static inline void rdma_init_context(struct rdma_context *rdma_ctx)
+{
+    rdma_ctx->cm_id = NULL;
+    rdma_ctx->listen_id = NULL;
+    rdma_ctx->verbs = NULL;
+    rdma_ctx->channel = NULL;
+    rdma_ctx->qp = NULL;
+    rdma_ctx->comp_channel = NULL;
+    rdma_ctx->pd = NULL;
+    rdma_ctx->cq = NULL;
+}
+
+void cpu_physical_memory_reset_dirty_all(void);
+
+int rdma_resolve_host(struct rdma_context *rdma_ctx,
+        const char *host, int port);
+int rdma_alloc_pd_cq(struct rdma_context *rdma_ctx);
+int rdma_alloc_qp(struct rdma_context *rdma_ctx);
+int rdma_migrate_connect(struct rdma_context *rdma_ctx,
+        void *in_data, int *in_len, void *out_data, int out_len);
+int rdma_migrate_accept(struct rdma_context *rdma_ctx,
+        void *in_data, int *in_len, void *out_data, int out_len);
+void rdma_migrate_disconnect(struct rdma_context *rdma_ctx);
+
+/* Instead of registering whole ram blocks, we can register them in smaller
+ * chunks. This may be benefial if the ram blocks have holes in them */
+#define RDMA_CHUNK_REGISTRATION
+
+#define RDMA_LAZY_REGISTRATION
+
+#define RDMA_REG_CHUNK_SHIFT 20
+#define RDMA_REG_CHUNK_SIZE (1UL << (RDMA_REG_CHUNK_SHIFT))
+#define RDMA_REG_CHUNK_INDEX(start_addr, host_addr) \
+            (((unsigned long)(host_addr) >> RDMA_REG_CHUNK_SHIFT) - \
+            ((unsigned long)(start_addr) >> RDMA_REG_CHUNK_SHIFT))
+#define RDMA_REG_NUM_CHUNKS(rdma_ram_block) \
+            (RDMA_REG_CHUNK_INDEX((rdma_ram_block)->local_host_addr,\
+                (rdma_ram_block)->local_host_addr +\
+                (rdma_ram_block)->length) + 1)
+#define RDMA_REG_CHUNK_START(rdma_ram_block, i) ((uint8_t *)\
+            ((((unsigned long)((rdma_ram_block)->local_host_addr) >> \
+                RDMA_REG_CHUNK_SHIFT) + (i)) << \
+                RDMA_REG_CHUNK_SHIFT))
+#define RDMA_REG_CHUNK_END(rdma_ram_block, i) \
+            (RDMA_REG_CHUNK_START(rdma_ram_block, i) + \
+             RDMA_REG_CHUNK_SIZE)
+
+struct rdma_ram_block {
+    uint8_t *local_host_addr;
+    uint64_t remote_host_addr;
+    uint64_t offset;
+    uint64_t length;
+    struct ibv_mr **pmr;
+    struct ibv_mr *mr;
+    uint32_t remote_rkey;
+};
+
+struct rdma_remote_ram_block {
+    uint64_t remote_host_addr;
+    uint64_t offset;
+    uint64_t length;
+    uint32_t remote_rkey;
+};
+
+#define RDMA_MAX_RAM_BLOCKS 64
+
+struct rdma_ram_blocks {
+    int num_blocks;
+    struct rdma_ram_block block[RDMA_MAX_RAM_BLOCKS];
+};
+
+struct rdma_remote_ram_blocks {
+    int num_blocks;
+    struct rdma_remote_ram_block block[RDMA_MAX_RAM_BLOCKS];
+};
+
+int rdma_init_ram_blocks(struct rdma_ram_blocks *rdma_ram_blocks);
+int rdma_reg_chunk_ram_blocks(struct rdma_context *rdma_ctx,
+        struct rdma_ram_blocks *rdma_ram_blocks);
+int rdma_reg_whole_ram_blocks(struct rdma_context *rdma_ctx,
+        struct rdma_ram_blocks *rdma_ram_blocks);
+int rdma_server_reg_ram_blocks(struct rdma_context *rdma_ctx,
+        struct rdma_ram_blocks *rdma_ram_blocks);
+int rdma_client_reg_ram_blocks(struct rdma_context *rdma_ctx,
+        struct rdma_ram_blocks *rdma_ram_blocks);
+void rdma_dereg_ram_blocks(struct rdma_ram_blocks *rdma_ram_blocks);
+
+void rdma_copy_to_remote_ram_blocks(struct rdma_ram_blocks *local,
+        struct rdma_remote_ram_blocks *remote);
+int rdma_process_remote_ram_blocks(struct rdma_ram_blocks *local,
+        struct rdma_remote_ram_blocks *remote);
+
+int rdma_search_ram_block(uint64_t offset, uint64_t length,
+        struct rdma_ram_blocks *blocks,
+        int *block_index, int *chunk_index);
+
+struct rdma_data {
+    char *host;
+    int port;
+    int enabled;
+    int gidx;
+    union ibv_gid gid;
+
+    struct rdma_context rdma_ctx;
+    struct rdma_ram_blocks rdma_ram_blocks;
+
+    /* This is used for synchronization: We use
+       IBV_WR_SEND to send it after all IBV_WR_RDMA_WRITEs
+       are done. When the receiver gets it, it can be certain
+       that all the RDMAs are completed. */
+    int sync;
+    struct ibv_mr *sync_mr;
+
+    /* This is used for the server to write the remote
+       ram blocks info. */
+    struct rdma_remote_ram_blocks remote_info;
+    struct ibv_mr *remote_info_mr;
+
+    /* The rest is only for the initiator of the migration. */
+    int client_init_done;
+
+    /* number of outstanding unsignaled send */
+    int num_unsignaled_send;
+
+    /* number of outstanding signaled send */
+    int num_signaled_send;
+
+    /* store info about current buffer so that we can
+       merge it with future sends */
+    uint64_t current_offset;
+    uint64_t current_length;
+    /* index of ram block the current buffer belongs to */
+    int current_index;
+    /* index of the chunk in the current ram block */
+    int current_chunk;
+
+    uint64_t total_bytes;
+
+};
+
+extern struct rdma_data rdma_mdata;
+
+#define rdma_update_capability(state)                              \
+    state->enabled_capabilities[MIGRATION_CAPABILITY_RDMA] =            \
+                        migration_use_rdma() ? true : false
+
+static inline int migration_use_rdma(void)
+{
+    /* port will be non-zero if user wants to use RDMA. */
+    return rdma_mdata.port != -1 && rdma_mdata.host;
+}
+
+static inline int migrate_rdma_enabled(void)
+{
+    return rdma_mdata.enabled;
+}
+
+void rdma_disable(void);
+
+#define RDMA_BLOCKING
+#define RDMA_EXTRA_SYNC
+
+enum {
+    RDMA_WRID_NONE = 0,
+    RDMA_WRID_RDMA,
+    RDMA_WRID_SEND_SYNC,
+    RDMA_WRID_RECV_SYNC,
+    RDMA_WRID_SEND_REMOTE_INFO,
+    RDMA_WRID_RECV_REMOTE_INFO,
+    RDMA_WRID_SEND_EXTRA_SYNC,
+    RDMA_WRID_RECV_EXTRA_SYNC,
+};
+
+int rdma_migrate_listen(struct rdma_data *mdata, char *host,
+                                                              int port);
+int rdma_reg_sync(struct rdma_data *mdata);
+int rdma_dereg_sync(struct rdma_data *mdata);
+int rdma_post_recv_sync(struct rdma_data *mdata,
+        int wr_id);
+
+int rdma_reg_remote_info(
+        struct rdma_data *mdata);
+int rdma_dereg_remote_info(
+        struct rdma_data *mdata);
+int rdma_post_send_remote_info(
+        struct rdma_data *mdata);
+int rdma_post_recv_remote_info(
+        struct rdma_data *mdata);
+
+int rdma_poll_for_wrid(
+        struct rdma_data *mdata,
+        int wrid);
+int rdma_block_for_wrid(
+        struct rdma_data *mdata,
+        int wrid);
+
+
+#ifdef CONFIG_RDMA
+int rdma_wait_for_connect(int fd, void * opaque);
+int rdma_start_incoming_migration(int s);
+void rdma_cleanup(struct rdma_data *mdata);
+int rdma_client_init(struct rdma_data *mdata);
+int rdma_client_connect(struct rdma_data *mdata);
+void rdma_data_init(struct rdma_data *mdata);
+int rdma_server_init(struct rdma_data *mdata);
+int rdma_server_prepare(struct rdma_data *mdata);
+int rdma_accept_incoming_migration(
+                                   struct rdma_data *mdata);
+int rdma_write(struct rdma_data *mdata,
+        uint64_t addr, uint64_t len);
+int rdma_write_flush(struct rdma_data *mdata);
+int rdma_poll(struct rdma_data *mdata);
+int rdma_post_send_sync(struct rdma_data *mdata,
+        int wr_id);
+int rdma_wait_for_wrid(
+        struct rdma_data *mdata,
+        int wrid);
+#else
+#define rdma_cleanup(...) do { printf("WARN: rdma not enabled\n"); } while(0)
+#define rdma_data_init(...) do { printf("WARN: rdma not enabled\n"); } while(0)
+#define rdma_wait_for_connect(...) 0
+#define rdma_start_incoming_migration(...) 0
+#define rdma_client_init(...) 0 
+#define rdma_client_connect(...) 0 
+#define rdma_server_init(...) 0 
+#define rdma_server_prepare(...) 0
+#define rdma_accept_incoming_migration(...) 0
+#define rdma_write(...) 0
+#define rdma_write_flush(...) 0
+#define rdma_poll(...) 0
+#define rdma_post_send_sync(...) 0
+#define rdma_wait_for_wrid(...) 0
+#endif
+
+#endif
diff --git a/migration-rdma.c b/migration-rdma.c
new file mode 100644
index 0000000..a64f350
--- /dev/null
+++ b/migration-rdma.c
@@ -0,0 +1,1444 @@
+/*
+ *  Copyright (C) 2013 Michael R. Hines <mrhines@us.ibm.com>
+ *  Copyright (C) 2013 Jiuxing Liu <jl@us.ibm.com>
+ *
+ *  RDMA data structures and helper functions (for migration)
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; under version 2 of the License.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+#include "qemu/rdma.h"
+#include "qemu-common.h"
+#include "migration/migration.h"
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netdb.h>
+#include <arpa/inet.h>
+#include <string.h>
+
+#define RDMA_RESOLVE_TIMEOUT_MS 10000
+#define RDMA_CQ_SIZE 2000
+#define RDMA_QP_SIZE 1000
+
+//#define DEBUG_MIGRATION_RDMA
+
+#ifdef DEBUG_MIGRATION_RDMA
+#define DPRINTF(fmt, ...) \
+    do { printf("migration-rdma: " fmt, ## __VA_ARGS__); } while (0)
+#else
+#define DPRINTF(fmt, ...) \
+    do { } while (0)
+#endif
+
+static void *rdma_mallocz(size_t size)
+{
+    void *ptr;
+    ptr = malloc(size);
+    memset(ptr, 0, size);
+    return ptr;
+}
+
+static void rdma_dump_id(const char * who, struct ibv_context * verbs) 
+{
+    printf("%s RDMA verbs Device opened: kernel name %s uverbs device name %s, infiniband_verbs class device path %s, infiniband class device path %s\n", who, verbs->device->name, verbs->device->dev_name, verbs->device->dev_path, verbs->device->ibdev_path);
+}
+
+static void rdma_dump_gid(const char * who, struct rdma_cm_id * id)
+{
+    char sgid[33];
+    char dgid[33];
+    inet_ntop(AF_INET6, &id->route.addr.addr.ibaddr.sgid, sgid, sizeof sgid);
+    inet_ntop(AF_INET6, &id->route.addr.addr.ibaddr.dgid, dgid, sizeof dgid);
+    printf("%s Source GID: %s, Dest GID: %s\n", who, sgid, dgid);
+}
+
+int rdma_resolve_host(struct rdma_context *rdma_ctx,
+        const char *host, int port)
+{
+    int ret;
+    struct addrinfo *res, *src;
+    char port_str[16];
+    struct rdma_cm_event *cm_event;
+    const char * srchost = "r9";
+
+
+    if (host == NULL || !strcmp(host, "")) {
+        printf("RDMA hostname has not been set\n");
+        return -1;
+    }
+
+    /* create CM channel */
+    rdma_ctx->channel = rdma_create_event_channel();
+    if (!rdma_ctx->channel) {
+        printf("could not create CM channel\n");
+        return -1;
+    }
+
+    /* create CM id */
+    ret = rdma_create_id(rdma_ctx->channel, &rdma_ctx->cm_id, NULL,
+            RDMA_PS_TCP);
+    if (ret) {
+        printf("could not create channel id\n");
+        goto err_resolve_create_id;
+    }
+
+    snprintf(port_str, 16, "%d", port);
+    port_str[15] = '\0';
+
+    ret = getaddrinfo(host, port_str, NULL, &res);
+    if (ret < 0) {
+        printf("could not getaddrinfo destination address %s\n", host);
+        goto err_resolve_get_addr;
+    }
+
+    ret = getaddrinfo(srchost, port_str, NULL, &src);
+    if (ret < 0) {
+        printf("could not getaddrinfo source address %s\n", srchost);
+        goto err_resolve_get_addr;
+    }
+
+    /* There may be multiple RDMA devices. Choose the right one.
+     * (We may need to select specific ports in the future, too.)
+     */
+    ret = rdma_bind_addr(rdma_ctx->cm_id, src->ai_addr);
+    if(ret < 0) {
+        printf("could not bind source client to local rdma device with src %s\n", srchost);
+        goto err_resolve_get_addr;
+    }
+
+    rdma_dump_id("client_bind", rdma_ctx->cm_id->verbs);
+    rdma_dump_gid("client_bind", rdma_ctx->cm_id);
+
+    /* resolve the first address */
+    ret = rdma_resolve_addr(rdma_ctx->cm_id, NULL, res->ai_addr,
+            RDMA_RESOLVE_TIMEOUT_MS);
+    if (ret) {
+        printf("could not resolve address %s\n", host);
+        goto err_resolve_get_addr;
+    }
+
+    ret = rdma_get_cm_event(rdma_ctx->channel, &cm_event);
+    if (ret) {
+        printf("could not perform event_addr_resolved\n");
+        goto err_resolve_get_addr;
+    }
+
+    if (cm_event->event != RDMA_CM_EVENT_ADDR_RESOLVED) {
+        printf("result not equal to event_addr_resolved %s\n", rdma_event_str(cm_event->event));
+        perror("rdma_resolve_addr");
+        rdma_ack_cm_event(cm_event);
+        goto err_resolve_get_addr;
+    }
+    rdma_ack_cm_event(cm_event);
+    rdma_dump_gid("client_resolved", rdma_ctx->cm_id);
+
+    /* resolve route */
+    ret = rdma_resolve_route(rdma_ctx->cm_id, RDMA_RESOLVE_TIMEOUT_MS);
+    if (ret) {
+        printf("could not resolve rdma route\n");
+        goto err_resolve_get_addr;
+    }
+
+    ret = rdma_get_cm_event(rdma_ctx->channel, &cm_event);
+    if (ret) {
+        printf("could not perform event_route_resolved\n");
+        goto err_resolve_get_addr;
+    }
+    if (cm_event->event != RDMA_CM_EVENT_ROUTE_RESOLVED) {
+        printf("result not equal to event_route_resolved: %s\n", rdma_event_str(cm_event->event));
+        rdma_ack_cm_event(cm_event);
+        goto err_resolve_get_addr;
+    }
+    rdma_ack_cm_event(cm_event);
+    rdma_ctx->verbs = rdma_ctx->cm_id->verbs;
+    return 0;
+
+err_resolve_get_addr:
+    rdma_destroy_id(rdma_ctx->cm_id);
+err_resolve_create_id:
+    rdma_destroy_event_channel(rdma_ctx->channel);
+    rdma_ctx->channel = NULL;
+
+    return -1;
+}
+
+int rdma_alloc_pd_cq(struct rdma_context *rdma_ctx)
+{
+
+    /* allocate pd */
+    rdma_ctx->pd = ibv_alloc_pd(rdma_ctx->verbs);
+    if (!rdma_ctx->pd) {
+        return -1;
+    }
+
+#ifdef RDMA_BLOCKING
+    /* create completion channel */
+    rdma_ctx->comp_channel = ibv_create_comp_channel(rdma_ctx->verbs);
+    if (!rdma_ctx->comp_channel) {
+        goto err_alloc_pd_cq;
+    }
+#endif
+
+    /* create cq */
+    rdma_ctx->cq = ibv_create_cq(rdma_ctx->verbs, RDMA_CQ_SIZE,
+            NULL, rdma_ctx->comp_channel, 0);
+    if (!rdma_ctx->cq) {
+        goto err_alloc_pd_cq;
+    }
+
+    return 0;
+
+err_alloc_pd_cq:
+    if (rdma_ctx->pd) {
+        ibv_dealloc_pd(rdma_ctx->pd);
+    }
+    if (rdma_ctx->comp_channel) {
+        ibv_destroy_comp_channel(rdma_ctx->comp_channel);
+    }
+    rdma_ctx->pd = NULL;
+    rdma_ctx->comp_channel = NULL;
+    return -1;
+
+}
+
+int rdma_alloc_qp(struct rdma_context *rdma_ctx)
+{
+    struct ibv_qp_init_attr attr = { 0 };
+    int ret;
+
+    attr.cap.max_send_wr = RDMA_QP_SIZE;
+    attr.cap.max_recv_wr = 2;
+    attr.cap.max_send_sge = 1;
+    attr.cap.max_recv_sge = 1;
+    attr.send_cq = rdma_ctx->cq;
+    attr.recv_cq = rdma_ctx->cq;
+    attr.qp_type = IBV_QPT_RC;
+
+    ret = rdma_create_qp(rdma_ctx->cm_id, rdma_ctx->pd, &attr);
+    if (ret) {
+        return -1;
+    }
+
+    rdma_ctx->qp = rdma_ctx->cm_id->qp;
+    return 0;
+}
+
+int rdma_wait_for_connect(int fd, void * opaque)
+{
+    if (rdma_client_init(&rdma_mdata)) {
+        return -1;
+    }
+
+    if (rdma_client_connect(&rdma_mdata)) {
+        return -1;
+    }
+
+    return 0;
+}
+int rdma_migrate_connect(struct rdma_context *rdma_ctx,
+        void *in_data, int *in_len, void *out_data, int out_len)
+{
+    int ret;
+    struct rdma_conn_param conn_param = { 0 };
+    struct rdma_cm_event *cm_event;
+
+    conn_param.initiator_depth = 2;
+    conn_param.retry_count = 5;
+    conn_param.private_data = out_data;
+    conn_param.private_data_len = out_len;
+
+    ret = rdma_connect(rdma_ctx->cm_id, &conn_param);
+    if (ret) {
+        return -1;
+    }
+
+    ret = rdma_get_cm_event(rdma_ctx->channel, &cm_event);
+    if (ret) {
+        return -1;
+    }
+    if (cm_event->event != RDMA_CM_EVENT_ESTABLISHED) {
+        return -1;
+    }
+
+    if (in_len) {
+        if (*in_len > cm_event->param.conn.private_data_len) {
+            *in_len = cm_event->param.conn.private_data_len;
+        }
+        if (*in_len) {
+            memcpy(in_data, cm_event->param.conn.private_data, *in_len);
+        }
+    }
+
+    rdma_ack_cm_event(cm_event);
+
+    return 0;
+}
+
+int rdma_migrate_listen(struct rdma_data *mdata, char *host,
+        int port)
+{
+    int ret;
+    struct rdma_cm_event *cm_event;
+    struct rdma_context *rdma_ctx = &mdata->rdma_ctx;
+    struct ibv_context *verbs;
+
+    ret = rdma_get_cm_event(rdma_ctx->channel, &cm_event);
+    if (ret) {
+        goto err_listen;
+    }
+
+    if (cm_event->event != RDMA_CM_EVENT_CONNECT_REQUEST) {
+        rdma_ack_cm_event(cm_event);
+        goto err_listen;
+    }
+
+    rdma_ctx->cm_id = cm_event->id;
+    verbs = cm_event->id->verbs;
+    printf("verbs context after listen: %p\n", verbs);
+    rdma_ack_cm_event(cm_event);
+
+    if (!rdma_ctx->verbs) {
+        rdma_ctx->verbs = verbs;
+        ret = rdma_server_prepare(mdata);
+        if (ret) {
+            fprintf(stderr, "rdma migration: error preparing server!\n");
+            goto err_listen;
+        }
+    } else if (rdma_ctx->verbs != verbs) {
+            fprintf(stderr, "ibv context not matching %p, %p!\n",
+                    rdma_ctx->verbs, verbs);
+            goto err_listen;
+    }
+    /* xxx destroy listen_id ??? */
+
+    return 0;
+
+err_listen:
+
+    return -1;
+
+}
+
+int rdma_migrate_accept(struct rdma_context *rdma_ctx,
+        void *in_data, int *in_len, void *out_data, int out_len)
+{
+    int ret;
+    struct rdma_conn_param conn_param = { 0 };
+    struct rdma_cm_event *cm_event;
+
+    conn_param.responder_resources = 2;
+    conn_param.private_data = out_data;
+    conn_param.private_data_len = out_len;
+
+    ret = rdma_accept(rdma_ctx->cm_id, &conn_param);
+    if (ret) {
+        fprintf(stderr, "rdma_accept returns %d!\n", ret);
+        return -1;
+    }
+
+    ret = rdma_get_cm_event(rdma_ctx->channel, &cm_event);
+    if (ret) {
+        return -1;
+    }
+
+    if (cm_event->event != RDMA_CM_EVENT_ESTABLISHED) {
+        rdma_ack_cm_event(cm_event);
+        return -1;
+    }
+
+    if (in_len) {
+        if (*in_len > cm_event->param.conn.private_data_len) {
+            *in_len = cm_event->param.conn.private_data_len;
+        }
+        if (*in_len) {
+            memcpy(in_data, cm_event->param.conn.private_data, *in_len);
+        }
+    }
+
+    rdma_ack_cm_event(cm_event);
+
+    return 0;
+}
+
+void rdma_migrate_disconnect(struct rdma_context *rdma_ctx)
+{
+    int ret;
+    struct rdma_cm_event *cm_event;
+
+    ret = rdma_disconnect(rdma_ctx->cm_id);
+    if (ret) {
+        return;
+    }
+    ret = rdma_get_cm_event(rdma_ctx->channel, &cm_event);
+    if (ret) {
+        return;
+    }
+    rdma_ack_cm_event(cm_event);
+}
+
+int rdma_reg_chunk_ram_blocks(struct rdma_context *rdma_ctx,
+        struct rdma_ram_blocks *rdma_ram_blocks)
+{
+    int i, j;
+    for (i = 0; i < rdma_ram_blocks->num_blocks; i++) {
+        struct rdma_ram_block *block = &(rdma_ram_blocks->block[i]);
+        int num_chunks = RDMA_REG_NUM_CHUNKS(block);
+        /* allocate memory to store chunk MRs */
+        rdma_ram_blocks->block[i].pmr = rdma_mallocz(
+                                num_chunks * sizeof(struct ibv_mr *));
+
+        if (!block->pmr) {
+            goto err_reg_chunk_ram_blocks;
+        }
+
+        for (j = 0; j < num_chunks; j++) {
+            uint8_t *start_addr = RDMA_REG_CHUNK_START(block, j);
+            uint8_t *end_addr = RDMA_REG_CHUNK_END(block, j);
+            if (start_addr < block->local_host_addr) {
+                start_addr = block->local_host_addr;
+            }
+            if (end_addr > block->local_host_addr + block->length) {
+                end_addr = block->local_host_addr + block->length;
+            }
+            block->pmr[j] = ibv_reg_mr(rdma_ctx->pd,
+                                start_addr,
+                                end_addr - start_addr,
+                                IBV_ACCESS_LOCAL_WRITE |
+                                IBV_ACCESS_REMOTE_WRITE |
+                                IBV_ACCESS_REMOTE_READ);
+            if (!block->pmr[j]) {
+                break;
+            }
+        }
+        if (j < num_chunks) {
+            for (j--; j >= 0; j--) {
+                ibv_dereg_mr(block->pmr[j]);
+            }
+            block->pmr[i] = NULL;
+            goto err_reg_chunk_ram_blocks;
+        }
+    }
+
+    return 0;
+
+err_reg_chunk_ram_blocks:
+    for (i--; i >= 0; i--) {
+        int num_chunks =
+            RDMA_REG_NUM_CHUNKS(&(rdma_ram_blocks->block[i]));
+        for (j = 0; j < num_chunks; j++) {
+            ibv_dereg_mr(rdma_ram_blocks->block[i].pmr[j]);
+        }
+        free(rdma_ram_blocks->block[i].pmr);
+        rdma_ram_blocks->block[i].pmr = NULL;
+    }
+
+    return -1;
+
+}
+
+int rdma_reg_whole_ram_blocks(struct rdma_context *rdma_ctx,
+        struct rdma_ram_blocks *rdma_ram_blocks)
+{
+    int i;
+    for (i = 0; i < rdma_ram_blocks->num_blocks; i++) {
+        rdma_ram_blocks->block[i].mr =
+            ibv_reg_mr(rdma_ctx->pd,
+                    rdma_ram_blocks->block[i].local_host_addr,
+                    rdma_ram_blocks->block[i].length,
+                    IBV_ACCESS_LOCAL_WRITE |
+                    IBV_ACCESS_REMOTE_WRITE |
+                    IBV_ACCESS_REMOTE_READ);
+        if (!rdma_ram_blocks->block[i].mr) {
+                break;
+        }
+    }
+
+    if (i >= rdma_ram_blocks->num_blocks) {
+        return 0;
+    }
+
+    for (i--; i >= 0; i--) {
+        ibv_dereg_mr(rdma_ram_blocks->block[i].mr);
+    }
+
+    return -1;
+
+}
+
+int rdma_client_reg_ram_blocks(struct rdma_context *rdma_ctx,
+                struct rdma_ram_blocks *rdma_ram_blocks)
+{
+#ifdef RDMA_CHUNK_REGISTRATION
+#ifdef RDMA_LAZY_REGISTRATION
+    return 0;
+#else
+    return rdma_reg_chunk_ram_blocks(rdma_ctx, rdma_ram_blocks);
+#endif
+#else
+    return rdma_reg_whole_ram_blocks(rdma_ctx, rdma_ram_blocks);
+#endif
+}
+
+int rdma_server_reg_ram_blocks(struct rdma_context *rdma_ctx,
+                struct rdma_ram_blocks *rdma_ram_blocks)
+{
+    return rdma_reg_whole_ram_blocks(rdma_ctx, rdma_ram_blocks);
+}
+
+void rdma_dereg_ram_blocks(struct rdma_ram_blocks *rdma_ram_blocks)
+{
+    int i, j;
+    for (i = 0; i < rdma_ram_blocks->num_blocks; i++) {
+        int num_chunks;
+        if (!rdma_ram_blocks->block[i].pmr) {
+            continue;
+        }
+        num_chunks = RDMA_REG_NUM_CHUNKS(&(rdma_ram_blocks->block[i]));
+        for (j = 0; j < num_chunks; j++) {
+            if (!rdma_ram_blocks->block[i].pmr[j]) {
+                continue;
+            }
+            ibv_dereg_mr(rdma_ram_blocks->block[i].pmr[j]);
+        }
+        free(rdma_ram_blocks->block[i].pmr);
+        rdma_ram_blocks->block[i].pmr = NULL;
+    }
+    for (i = 0; i < rdma_ram_blocks->num_blocks; i++) {
+        if (!rdma_ram_blocks->block[i].mr) {
+            continue;
+        }
+        ibv_dereg_mr(rdma_ram_blocks->block[i].mr);
+        rdma_ram_blocks->block[i].mr = NULL;
+    }
+}
+
+void rdma_copy_to_remote_ram_blocks(struct rdma_ram_blocks *local,
+                struct rdma_remote_ram_blocks *remote)
+{
+    int i;
+    remote->num_blocks = local->num_blocks;
+    for (i = 0; i < local->num_blocks; i++) {
+            remote->block[i].remote_host_addr =
+                (uint64_t)(local->block[i].local_host_addr);
+            remote->block[i].remote_rkey = local->block[i].mr->rkey;
+            remote->block[i].offset = local->block[i].offset;
+            remote->block[i].length = local->block[i].length;
+    }
+}
+
+int rdma_process_remote_ram_blocks(struct rdma_ram_blocks *local,
+                struct rdma_remote_ram_blocks *remote)
+{
+    int i, j;
+
+    if (local->num_blocks != remote->num_blocks) {
+        return -1;
+    }
+
+    for (i = 0; i < remote->num_blocks; i++) {
+        /* search local ram blocks */
+        for (j = 0; j < local->num_blocks; j++) {
+            if (remote->block[i].offset != local->block[j].offset) {
+                continue;
+            }
+            if (remote->block[i].length != local->block[j].length) {
+                return -1;
+            }
+            local->block[j].remote_host_addr =
+                remote->block[i].remote_host_addr;
+            local->block[j].remote_rkey = remote->block[i].remote_rkey;
+            break;
+        }
+        if (j >= local->num_blocks) {
+            return -1;
+        }
+    }
+
+    return 0;
+}
+
+int rdma_search_ram_block(uint64_t offset, uint64_t length,
+                struct rdma_ram_blocks *blocks,
+                int *block_index, int *chunk_index)
+{
+    int i;
+    for (i = 0; i < blocks->num_blocks; i++) {
+        if (offset < blocks->block[i].offset) {
+            continue;
+        }
+        if (offset + length >
+                blocks->block[i].offset + blocks->block[i].length) {
+            continue;
+        }
+        *block_index = i;
+        if (chunk_index) {
+            uint8_t *host_addr = blocks->block[i].local_host_addr +
+                (offset - blocks->block[i].offset);
+            *chunk_index = RDMA_REG_CHUNK_INDEX(
+                    blocks->block[i].local_host_addr, host_addr);
+        }
+        return 0;
+    }
+    return -1;
+}
+
+static int rdma_get_lkey(struct rdma_context *rdma_ctx,
+        struct rdma_ram_block *block, uint64_t host_addr,
+        uint32_t *lkey)
+{
+    int chunk;
+    if (block->mr) {
+        *lkey = block->mr->lkey;
+        return 0;
+    }
+    if (!block->pmr) {
+        int num_chunks = RDMA_REG_NUM_CHUNKS(block);
+        /* allocate memory to store chunk MRs */
+        block->pmr = rdma_mallocz(num_chunks *
+                sizeof(struct ibv_mr *));
+        if (!block->pmr) {
+            return -1;
+        }
+    }
+    chunk = RDMA_REG_CHUNK_INDEX(block->local_host_addr, host_addr);
+    if (!block->pmr[chunk]) {
+        uint8_t *start_addr = RDMA_REG_CHUNK_START(block, chunk);
+        uint8_t *end_addr = RDMA_REG_CHUNK_END(block, chunk);
+        if (start_addr < block->local_host_addr) {
+            start_addr = block->local_host_addr;
+        }
+        if (end_addr > block->local_host_addr + block->length) {
+            end_addr = block->local_host_addr + block->length;
+        }
+        block->pmr[chunk] = ibv_reg_mr(rdma_ctx->pd,
+                start_addr,
+                end_addr - start_addr,
+                IBV_ACCESS_LOCAL_WRITE |
+                IBV_ACCESS_REMOTE_WRITE |
+                IBV_ACCESS_REMOTE_READ);
+        if (!block->pmr[chunk]) {
+            return -1;
+        }
+    }
+    *lkey = block->pmr[chunk]->lkey;
+    return 0;
+}
+
+/* Do not merge data if larger than this. */
+#define RDMA_MERGE_MAX (4 * 1024 * 1024)
+
+#define RDMA_UNSIGNALED_SEND_MAX 64
+
+int rdma_reg_sync(struct rdma_data *mdata)
+{
+    mdata->sync_mr = ibv_reg_mr(mdata->rdma_ctx.pd,
+            &mdata->sync,
+            sizeof mdata->sync,
+            IBV_ACCESS_LOCAL_WRITE |
+            IBV_ACCESS_REMOTE_WRITE |
+            IBV_ACCESS_REMOTE_READ);
+    if (mdata->sync_mr) {
+        return 0;
+    }
+    return -1;
+}
+
+int rdma_dereg_sync(struct rdma_data *mdata)
+{
+    return ibv_dereg_mr(mdata->sync_mr);
+}
+
+int rdma_reg_remote_info(
+        struct rdma_data *mdata)
+{
+    mdata->remote_info_mr = ibv_reg_mr(mdata->rdma_ctx.pd,
+            &mdata->remote_info,
+            sizeof mdata->remote_info,
+            IBV_ACCESS_LOCAL_WRITE |
+            IBV_ACCESS_REMOTE_WRITE |
+            IBV_ACCESS_REMOTE_READ);
+    if (mdata->remote_info_mr) {
+        return 0;
+    }
+    return -1;
+}
+
+int rdma_dereg_remote_info(
+        struct rdma_data *mdata)
+{
+    return ibv_dereg_mr(mdata->remote_info_mr);
+}
+
+
+int rdma_post_send_sync(struct rdma_data *mdata,
+        int wr_id)
+{
+    struct ibv_sge sge;
+    struct ibv_send_wr send_wr = { 0 };
+    struct ibv_send_wr *bad_wr;
+
+    mdata->sync = 1;
+
+    sge.addr = (uint64_t)(&mdata->sync);
+    sge.length = sizeof mdata->sync;
+    sge.lkey = mdata->sync_mr->lkey;
+
+    send_wr.wr_id = wr_id;
+    send_wr.opcode = IBV_WR_SEND;
+    send_wr.send_flags = IBV_SEND_SIGNALED;
+    send_wr.sg_list = &sge;
+    send_wr.num_sge = 1;
+
+    if (ibv_post_send(mdata->rdma_ctx.qp, &send_wr, &bad_wr)) {
+        return -1;
+    }
+
+    return 0;
+}
+
+int rdma_post_recv_sync(struct rdma_data *mdata,
+        int wr_id)
+{
+    struct ibv_sge sge;
+    struct ibv_recv_wr recv_wr = { 0 };
+    struct ibv_recv_wr *bad_wr;
+
+    mdata->sync = 1;
+
+    sge.addr = (uint64_t)(&mdata->sync);
+    sge.length = sizeof mdata->sync;
+    sge.lkey = mdata->sync_mr->lkey;
+
+    recv_wr.wr_id = wr_id;
+    recv_wr.sg_list = &sge;
+    recv_wr.num_sge = 1;
+
+    if (ibv_post_recv(mdata->rdma_ctx.qp, &recv_wr, &bad_wr)) {
+        return -1;
+    }
+
+    return 0;
+
+}
+
+int rdma_post_send_remote_info(
+        struct rdma_data *mdata)
+{
+    struct ibv_sge sge;
+    struct ibv_send_wr send_wr = { 0 };
+    struct ibv_send_wr *bad_wr;
+
+    sge.addr = (uint64_t)(&mdata->remote_info);
+    sge.length = sizeof mdata->remote_info;
+    sge.lkey = mdata->remote_info_mr->lkey;
+
+    send_wr.wr_id = RDMA_WRID_SEND_REMOTE_INFO;
+    send_wr.opcode = IBV_WR_SEND;
+    send_wr.send_flags = IBV_SEND_SIGNALED;
+    send_wr.sg_list = &sge;
+    send_wr.num_sge = 1;
+
+    if (ibv_post_send(mdata->rdma_ctx.qp, &send_wr, &bad_wr)) {
+        return -1;
+    }
+
+    mdata->num_signaled_send--;
+    return 0;
+}
+
+int rdma_post_recv_remote_info(
+        struct rdma_data *mdata)
+{
+    struct ibv_sge sge;
+    struct ibv_recv_wr recv_wr = { 0 };
+    struct ibv_recv_wr *bad_wr;
+
+    sge.addr = (uint64_t)(&mdata->remote_info);
+    sge.length = sizeof mdata->remote_info;
+    sge.lkey = mdata->remote_info_mr->lkey;
+
+    recv_wr.wr_id = RDMA_WRID_RECV_REMOTE_INFO;
+    recv_wr.sg_list = &sge;
+    recv_wr.num_sge = 1;
+
+    if (ibv_post_recv(mdata->rdma_ctx.qp, &recv_wr, &bad_wr)) {
+        return -1;
+    }
+
+    return 0;
+}
+
+static int rdma_write_actual(struct rdma_context *rdma_ctx,
+        struct rdma_ram_block *block,
+        uint64_t offset, uint64_t length,
+        uint64_t wr_id, enum ibv_send_flags flag)
+{
+    struct ibv_sge sge;
+    struct ibv_send_wr send_wr = { 0 };
+    struct ibv_send_wr *bad_wr;
+
+    sge.addr = (uint64_t)(block->local_host_addr + (offset - block->offset));
+    sge.length = length;
+    if (rdma_get_lkey(rdma_ctx, block, sge.addr, &sge.lkey)) {
+        fprintf(stderr, "cannot get lkey!\n");
+        return -1;
+    }
+    send_wr.wr_id = wr_id;
+    send_wr.opcode = IBV_WR_RDMA_WRITE;
+    send_wr.send_flags = flag;
+    send_wr.sg_list = &sge;
+    send_wr.num_sge = 1;
+    send_wr.wr.rdma.rkey = block->remote_rkey;
+    send_wr.wr.rdma.remote_addr = block->remote_host_addr +
+        (offset - block->offset);
+
+    if (ibv_post_send(rdma_ctx->qp, &send_wr, &bad_wr)) {
+        return -1;
+    }
+
+    return 0;
+}
+
+int rdma_write_flush(struct rdma_data *mdata)
+{
+    int ret;
+    enum ibv_send_flags flags = 0;
+
+    if (!mdata->current_length) {
+        return 0;
+    }
+    if (mdata->num_unsignaled_send >=
+            RDMA_UNSIGNALED_SEND_MAX) {
+        flags = IBV_SEND_SIGNALED;
+    }
+    ret = rdma_write_actual(&mdata->rdma_ctx,
+            &(mdata->rdma_ram_blocks.block[mdata->current_index]),
+            mdata->current_offset,
+            mdata->current_length,
+            RDMA_WRID_RDMA, flags);
+
+    if (ret) {
+        if (ret < 0) {
+            fprintf(stderr, "rdma migration: write flush error!\n");
+        }
+        return ret;
+    }
+
+    if (mdata->num_unsignaled_send >=
+            RDMA_UNSIGNALED_SEND_MAX) {
+        mdata->num_unsignaled_send = 0;
+        mdata->num_signaled_send++;
+    } else {
+        mdata->num_unsignaled_send++;
+    }
+
+    mdata->total_bytes += mdata->current_length;
+    mdata->current_length = 0;
+    mdata->current_offset = 0;
+
+    return 0;
+}
+
+static inline int rdma_in_current_block(
+        struct rdma_data *mdata,
+        uint64_t offset, uint64_t len)
+{
+    struct rdma_ram_block *block =
+        &(mdata->rdma_ram_blocks.block[mdata->current_index]);
+    if (mdata->current_index < 0) {
+        return 0;
+    }
+    if (offset < block->offset) {
+        return 0;
+    }
+    if (offset + len > block->offset + block->length) {
+        return 0;
+    }
+    return 1;
+}
+
+static inline int rdma_in_current_chunk(
+        struct rdma_data *mdata,
+        uint64_t offset, uint64_t len)
+{
+    struct rdma_ram_block *block =
+        &(mdata->rdma_ram_blocks.block[mdata->current_index]);
+    uint8_t *chunk_start, *chunk_end, *host_addr;
+    if (mdata->current_chunk < 0) {
+        return 0;
+    }
+    host_addr = block->local_host_addr + (offset - block->offset);
+    chunk_start = RDMA_REG_CHUNK_START(block, mdata->current_chunk);
+    if (chunk_start < block->local_host_addr) {
+        chunk_start = block->local_host_addr;
+    }
+    if (host_addr < chunk_start) {
+        return 0;
+    }
+    chunk_end = RDMA_REG_CHUNK_END(block, mdata->current_chunk);
+    if (chunk_end > chunk_start + block->length) {
+        chunk_end = chunk_start + block->length;
+    }
+    if (host_addr + len > chunk_end) {
+        return 0;
+    }
+    return 1;
+}
+
+static inline int rdma_buffer_mergable(
+        struct rdma_data *mdata,
+        uint64_t offset, uint64_t len)
+{
+    if (mdata->current_length == 0) {
+        return 0;
+    }
+    if (offset != mdata->current_offset + mdata->current_length) {
+        return 0;
+    }
+    if (!rdma_in_current_block(mdata, offset, len)) {
+        return 0;
+    }
+#ifdef RDMA_CHUNK_REGISTRATION
+    if (!rdma_in_current_chunk(mdata, offset, len)) {
+        return 0;
+    }
+#endif
+    return 1;
+}
+
+/* Note that buffer must be within a single block/chunk. */
+int rdma_write(struct rdma_data *mdata,
+                uint64_t offset, uint64_t len)
+{
+    int index = mdata->current_index;
+    int chunk_index = mdata->current_chunk;
+    int ret;
+
+    /* If we cannot merge it, we flush the current buffer first. */
+    if (!rdma_buffer_mergable(mdata, offset, len)) {
+        ret = rdma_write_flush(mdata);
+        if (ret) {
+            return ret;
+        }
+        mdata->current_length = 0;
+        mdata->current_offset = offset;
+
+        if (rdma_search_ram_block(offset, len,
+                    &mdata->rdma_ram_blocks, &index, &chunk_index)) {
+            return -1;
+        }
+        mdata->current_index = index;
+        mdata->current_chunk = chunk_index;
+    }
+
+    /* merge it */
+    mdata->current_length += len;
+
+    /* flush it if buffer is too large */
+    if (mdata->current_length >= RDMA_MERGE_MAX) {
+        return rdma_write_flush(mdata);
+    }
+
+    return 0;
+}
+
+int rdma_poll(struct rdma_data *mdata)
+{
+    int ret;
+    struct ibv_wc wc;
+
+    ret = ibv_poll_cq(mdata->rdma_ctx.cq, 1, &wc);
+    if (!ret) {
+        return RDMA_WRID_NONE;
+    }
+    if (ret < 0) {
+        fprintf(stderr, "ibv_poll_cq return %d!\n", ret);
+        return ret;
+    }
+    if (wc.status != IBV_WC_SUCCESS) {
+        fprintf(stderr, "ibv_poll_cq wc.status=%d %s!\n",
+                        wc.status, ibv_wc_status_str(wc.status));
+        fprintf(stderr, "ibv_poll_cq wrid=%"PRIu64"!\n", wc.wr_id);
+
+        return -1;
+    }
+
+    if (!(wc.opcode & IBV_WC_RECV)) {
+        mdata->num_signaled_send--;
+    }
+
+    return  (int)wc.wr_id;
+}
+
+int rdma_wait_for_wrid(
+        struct rdma_data *mdata,
+        int wrid)
+{
+#ifdef RDMA_BLOCKING
+    return rdma_block_for_wrid(mdata, wrid);
+#else
+    return rdma_poll_for_wrid(mdata, wrid);
+#endif
+}
+
+int rdma_poll_for_wrid(
+        struct rdma_data *mdata,
+        int wrid)
+{
+    int r = RDMA_WRID_NONE;
+    while (r != wrid) {
+        r = rdma_poll(mdata);
+        if (r < 0) {
+            return r;
+        }
+    }
+    return 0;
+}
+
+int rdma_block_for_wrid(
+        struct rdma_data *mdata,
+        int wrid)
+{
+    int num_cq_events = 0;
+    int r = RDMA_WRID_NONE;
+    struct ibv_cq *cq;
+    void *cq_ctx;
+
+    if (ibv_req_notify_cq(mdata->rdma_ctx.cq, 0)) {
+        return -1;
+    }
+    /* poll cq first */
+    while (r != wrid) {
+        r = rdma_poll(mdata);
+        if (r < 0) {
+            return r;
+        }
+        if (r == RDMA_WRID_NONE) {
+            break;
+        }
+    }
+    if (r == wrid) {
+        return 0;
+    }
+
+    while (1) {
+        if (ibv_get_cq_event(mdata->rdma_ctx.comp_channel,
+                    &cq, &cq_ctx)) {
+            goto err_block_for_wrid;
+        }
+        num_cq_events++;
+        if (ibv_req_notify_cq(cq, 0)) {
+            goto err_block_for_wrid;
+        }
+        /* poll cq */
+        while (r != wrid) {
+            r = rdma_poll(mdata);
+            if (r < 0) {
+                goto err_block_for_wrid;
+            }
+            if (r == RDMA_WRID_NONE) {
+                break;
+            }
+        }
+        if (r == wrid) {
+            goto success_block_for_wrid;
+        }
+    }
+
+success_block_for_wrid:
+    if (num_cq_events) {
+        ibv_ack_cq_events(cq, num_cq_events);
+    }
+    return 0;
+
+err_block_for_wrid:
+    if (num_cq_events) {
+        ibv_ack_cq_events(cq, num_cq_events);
+    }
+    return -1;
+}
+
+void rdma_cleanup(struct rdma_data *mdata)
+{
+    struct rdma_context *rdma_ctx = &mdata->rdma_ctx;
+    
+    mdata->enabled = 0;
+    if (mdata->sync_mr) {
+        rdma_dereg_sync(mdata);
+    }
+    if (mdata->remote_info_mr) {
+        rdma_dereg_remote_info(mdata);
+    }
+    mdata->sync_mr = NULL;
+    mdata->remote_info_mr = NULL;
+    rdma_dereg_ram_blocks(&mdata->rdma_ram_blocks);
+    mdata->rdma_ram_blocks.num_blocks = 0;
+
+    if (rdma_ctx->qp) {
+        ibv_destroy_qp(rdma_ctx->qp);
+    }
+    if (rdma_ctx->cq) {
+        ibv_destroy_cq(rdma_ctx->cq);
+    }
+    if (rdma_ctx->comp_channel) {
+        ibv_destroy_comp_channel(rdma_ctx->comp_channel);
+    }
+    if (rdma_ctx->pd) {
+        ibv_dealloc_pd(rdma_ctx->pd);
+    }
+    if (rdma_ctx->listen_id) {
+        rdma_destroy_id(rdma_ctx->listen_id);
+    }
+    if (rdma_ctx->cm_id) {
+        rdma_destroy_id(rdma_ctx->cm_id);
+    }
+    if (rdma_ctx->channel) {
+        rdma_destroy_event_channel(rdma_ctx->channel);
+    }
+
+    rdma_data_init(mdata);
+}
+
+int rdma_client_init(struct rdma_data *mdata)
+{
+    int ret;
+
+    if (mdata->client_init_done) {
+        return 0;
+    }
+
+    ret = rdma_resolve_host(&mdata->rdma_ctx,
+            mdata->host, mdata->port);
+    if (ret) {
+        fprintf(stderr, "rdma migration: error resolving host!\n");
+        goto err_rdma_client_init;
+    }
+
+    ret = rdma_alloc_pd_cq(&mdata->rdma_ctx);
+    if (ret) {
+        fprintf(stderr, "rdma migration: error allocating pd and cq!\n");
+        goto err_rdma_client_init;
+    }
+
+    ret = rdma_alloc_qp(&mdata->rdma_ctx);
+    if (ret) {
+        fprintf(stderr, "rdma migration: error allocating qp!\n");
+        goto err_rdma_client_init;
+    }
+
+    ret = rdma_init_ram_blocks(&mdata->rdma_ram_blocks);
+    if (ret) {
+        fprintf(stderr, "rdma migration: error initializing ram blocks!\n");
+        goto err_rdma_client_init;
+    }
+
+    ret = rdma_client_reg_ram_blocks(&mdata->rdma_ctx,
+            &mdata->rdma_ram_blocks);
+    if (ret) {
+        fprintf(stderr, "rdma migration: error registering ram blocks!\n");
+        goto err_rdma_client_init;
+    }
+
+    ret = rdma_reg_sync(mdata);
+    if (ret) {
+        fprintf(stderr, "rdma migration: error registering sync data!\n");
+        goto err_rdma_client_init;
+    }
+
+    ret = rdma_reg_remote_info(mdata);
+    if (ret) {
+        fprintf(stderr, "rdma migration: error registering remote info!\n");
+        goto err_rdma_client_init;
+    }
+
+    ret = rdma_post_recv_remote_info(mdata);
+    if (ret) {
+        fprintf(stderr, "rdma migration: error posting remote info recv!\n");
+        goto err_rdma_client_init;
+    }
+
+    mdata->client_init_done = 1;
+    DPRINTF("rdma_client_init success\n");
+    return 0;
+
+err_rdma_client_init:
+    rdma_cleanup(mdata);
+    return -1;
+}
+
+int rdma_client_connect(struct rdma_data *mdata)
+{
+    int ret;
+
+    ret = rdma_migrate_connect(&mdata->rdma_ctx, NULL, NULL, NULL, 0);
+    if (ret) {
+        fprintf(stderr, "rdma migration: error connecting!\n");
+        goto err_rdma_client_connect;
+    }
+
+    /* wait for remote info */
+    ret = rdma_wait_for_wrid(&rdma_mdata,
+            RDMA_WRID_RECV_REMOTE_INFO);
+    if (ret < 0) {
+        fprintf(stderr, "rdma migration: polling remote info error!\n");
+        goto err_rdma_client_connect;
+    }
+
+    ret = rdma_process_remote_ram_blocks(
+            &mdata->rdma_ram_blocks, &mdata->remote_info);
+    if (ret) {
+        fprintf(stderr,
+                "rdma migration: error processing remote ram blocks!\n");
+        goto err_rdma_client_connect;
+    }
+
+    rdma_mdata.total_bytes = 0;
+    rdma_mdata.enabled = 1;
+    DPRINTF("rdma_client_connect success\n");
+    return 0;
+
+err_rdma_client_connect:
+    rdma_cleanup(mdata);
+    return -1;
+}
+
+int rdma_start_incoming_migration(int s)
+{
+    int ret = rdma_server_init(&rdma_mdata);
+    if (ret) {
+        return -1;
+    }
+
+    ret = rdma_server_prepare(&rdma_mdata);
+    if (ret) {
+        return -1;
+    }
+    return 0;
+}
+
+int rdma_server_init(struct rdma_data *mdata)
+{
+
+    int ret;
+    struct sockaddr_in sin;
+    struct rdma_cm_id *listen_id;
+    struct rdma_context *rdma_ctx = &mdata->rdma_ctx;
+
+    if(mdata->host == NULL) {
+        printf("Error: RDMA host is not set! port: %d\n", mdata->port);
+        return -1;
+    }
+    /* create CM channel */
+    rdma_ctx->channel = rdma_create_event_channel();
+    if (!rdma_ctx->channel) {
+        return -1;
+    }
+
+    /* create CM id */
+    ret = rdma_create_id(rdma_ctx->channel, &listen_id, NULL,
+            RDMA_PS_TCP);
+    if (ret) {
+        goto err_server_init_create_listen_id;
+    }
+
+    memset(&sin, 0, sizeof(sin));
+    sin.sin_family = AF_INET;
+    sin.sin_port = htons(mdata->port);
+
+    if (mdata->host && strcmp("", mdata->host)) {
+        struct hostent *server_addr;
+        server_addr = gethostbyname(mdata->host);
+        if (!server_addr) {
+            goto err_server_init_bind_addr;
+        }
+        memcpy(&sin.sin_addr.s_addr, server_addr->h_addr,
+                server_addr->h_length);
+    } else {
+        sin.sin_addr.s_addr = INADDR_ANY;
+    }
+
+    ret = rdma_bind_addr(listen_id, (struct sockaddr *)&sin);
+    if (ret) {
+        goto err_server_init_bind_addr;
+    }
+
+    rdma_ctx->listen_id = listen_id;
+    if (listen_id->verbs) {
+        rdma_ctx->verbs = listen_id->verbs;
+    }
+    rdma_dump_id("server_init", rdma_ctx->verbs);
+    rdma_dump_gid("server_init", listen_id);
+    return 0;
+
+err_server_init_bind_addr:
+    rdma_destroy_id(listen_id);
+err_server_init_create_listen_id:
+    rdma_destroy_event_channel(rdma_ctx->channel);
+    rdma_ctx->channel = NULL;
+    fprintf(stderr, "rdma migration: error init server!\n");
+
+    return -1;
+
+}
+
+int rdma_server_prepare(struct rdma_data *mdata)
+{
+    int ret;
+    struct rdma_context *rdma_ctx = &mdata->rdma_ctx;
+
+    if (!rdma_ctx->verbs) {
+        return 0;
+    }
+
+    ret = rdma_alloc_pd_cq(rdma_ctx);
+    if (ret) {
+        fprintf(stderr, "rdma migration: error allocating pd and cq!\n");
+        goto err_rdma_server_prepare;
+    }
+
+    ret = rdma_init_ram_blocks(&mdata->rdma_ram_blocks);
+    if (ret) {
+        fprintf(stderr, "rdma migration: error initializing ram blocks!\n");
+        goto err_rdma_server_prepare;
+    }
+
+    ret = rdma_server_reg_ram_blocks(rdma_ctx,
+            &mdata->rdma_ram_blocks);
+    if (ret) {
+        fprintf(stderr, "rdma migration: error registering ram blocks!\n");
+        goto err_rdma_server_prepare;
+    }
+
+    ret = rdma_reg_sync(mdata);
+    if (ret) {
+        fprintf(stderr, "rdma migration: error registering sync data!\n");
+        goto err_rdma_server_prepare;
+    }
+
+    rdma_copy_to_remote_ram_blocks(&mdata->rdma_ram_blocks,
+            &mdata->remote_info);
+
+    ret = rdma_reg_remote_info(mdata);
+    if (ret) {
+        fprintf(stderr, "rdma migration: error registering remote info!\n");
+        goto err_rdma_server_prepare;
+    }
+
+    ret = rdma_listen(rdma_ctx->listen_id, 5);
+    if (ret) {
+        fprintf(stderr, "rdma migration: error listening on socket!\n");
+        goto err_rdma_server_prepare;
+    }
+
+    return 0;
+
+err_rdma_server_prepare:
+    rdma_cleanup(mdata);
+    fprintf(stderr, "rdma migration: error preparing server!\n");
+    return -1;
+}
+
+int rdma_accept_incoming_migration(
+                                    struct rdma_data *mdata)
+{
+
+    int ret;
+
+    ret = rdma_migrate_listen(mdata, mdata->host, mdata->port);
+    if (ret) {
+        fprintf(stderr, "rdma migration: error listening!\n");
+        goto err_rdma_server_wait;
+    }
+
+    ret = rdma_alloc_qp(&mdata->rdma_ctx);
+    if (ret) {
+        fprintf(stderr, "rdma migration: error allocating qp!\n");
+        goto err_rdma_server_wait;
+    }
+
+#ifdef RDMA_EXTRA_SYNC
+    ret = rdma_post_recv_sync(mdata,
+            RDMA_WRID_RECV_EXTRA_SYNC);
+    if (ret) {
+        fprintf(stderr, "rdma migration: error posting extra sync receive!\n");
+        goto err_rdma_server_wait;
+    }
+#endif
+
+    ret = rdma_post_recv_sync(mdata,
+            RDMA_WRID_RECV_SYNC);
+    if (ret) {
+        fprintf(stderr, "rdma migration: error posting sync receive!\n");
+        goto err_rdma_server_wait;
+    }
+
+    ret = rdma_migrate_accept(&mdata->rdma_ctx, NULL, NULL, NULL, 0);
+    if (ret) {
+        fprintf(stderr, "rdma migration: error accepting connection!\n");
+        goto err_rdma_server_wait;
+    }
+
+    /* send remote info */
+    ret = rdma_post_send_remote_info(mdata);
+    if (ret) {
+        fprintf(stderr, "rdma migration: error sending remote info!\n");
+        goto err_rdma_server_wait;
+    }
+
+    /* wait for completion */
+    ret = rdma_wait_for_wrid(&rdma_mdata,
+            RDMA_WRID_SEND_REMOTE_INFO);
+    if (ret < 0) {
+        fprintf(stderr, "rdma migration: polling remote info error!\n");
+        goto err_rdma_server_wait;
+    }
+
+    rdma_mdata.total_bytes = 0;
+    rdma_mdata.enabled = 1;
+    rdma_dump_gid("server_connect", mdata->rdma_ctx.cm_id);
+    return 0;
+
+err_rdma_server_wait:
+    fprintf(stderr, "rdma migration: error waiting for client!\n");
+    rdma_cleanup(mdata);
+    return -1;
+
+}
+
+void rdma_data_init(struct rdma_data *mdata)
+{
+    rdma_init_context(&mdata->rdma_ctx);
+    printf("rdma port: %d\n", rdmaport);
+    printf("rdma host: %s\n", rdmahost);
+    mdata->port = rdmaport;
+    mdata->host = rdmahost;
+    mdata->enabled = 0;
+    mdata->rdma_ram_blocks.num_blocks = 0;
+    mdata->client_init_done = 0;
+    mdata->num_unsignaled_send = 0;
+    mdata->num_signaled_send = 0;
+    mdata->current_offset = 0;
+    mdata->current_length = 0;
+    mdata->current_index = -1;
+    mdata->current_chunk = -1;
+    mdata->sync = 0;
+    mdata->sync_mr = NULL;
+    mdata->remote_info_mr = NULL;
+    rdma_update_capability(migrate_get_current());
+}
+
+void rdma_disable(void)
+{
+    rdma_mdata.port = -1;
+    rdma_mdata.enabled = 0;
+}
