migration/rdma.h

   1 /*
   2  * RDMA protocol and interfaces
   3  *
   4  * Copyright IBM, Corp. 2010-2013
   5  * Copyright Red Hat, Inc. 2015-2016
   6  *
   7  * Authors:
   8  *  Michael R. Hines <mrhines@us.ibm.com>
   9  *  Jiuxing Liu <jl@us.ibm.com>
  10  *  Daniel P. Berrange <berrange@redhat.com>
  11  *
  12  * This work is licensed under the terms of the GNU GPL, version 2 or
  13  * later.  See the COPYING file in the top-level directory.
  14  *
  15  */
  16
  17 #ifndef QEMU_MIGRATION_RDMA_H
  18 #define QEMU_MIGRATION_RDMA_H
  19
  20 #include "exec/memory.h"
  21
  22 void rdma_start_outgoing_migration(void *opaque, const char *host_port,
  23                                    Error **errp);
  24
  25 void rdma_start_incoming_migration(const char *host_port, Error **errp);
  26
  27 /*
  28  * Constants used by rdma return codes
  29  */
  30 #define RAM_CONTROL_SETUP     0
  31 #define RAM_CONTROL_ROUND     1
  32 #define RAM_CONTROL_FINISH    3
  33
  34 /*
  35  * Whenever this is found in the data stream, the flags
  36  * will be passed to rdma functions in the incoming-migration
  37  * side.
  38  */
  39 #define RAM_SAVE_FLAG_HOOK     0x80
  40
  41 #define RAM_SAVE_CONTROL_NOT_SUPP -1000
  42 #define RAM_SAVE_CONTROL_DELAYED  -2000
  43
  44 #ifdef CONFIG_RDMA
  45 int qemu_rdma_registration_handle(QEMUFile *f);
  46 int qemu_rdma_registration_start(QEMUFile *f, uint64_t flags);
  47 int qemu_rdma_registration_stop(QEMUFile *f, uint64_t flags);
  48 int rdma_block_notification_handle(QEMUFile *f, const char *name);
  49 int rdma_control_save_page(QEMUFile *f, ram_addr_t block_offset,
  50                            ram_addr_t offset, size_t size);
  51 #else
  52 static inline
  53 int qemu_rdma_registration_handle(QEMUFile *f) { return 0; }
  54 static inline
  55 int qemu_rdma_registration_start(QEMUFile *f, uint64_t flags) { return 0; }
  56 static inline
  57 int qemu_rdma_registration_stop(QEMUFile *f, uint64_t flags) { return 0; }
  58 static inline
  59 int rdma_block_notification_handle(QEMUFile *f, const char *name) { return 0; }
  60 static inline
  61 int rdma_control_save_page(QEMUFile *f, ram_addr_t block_offset,
  62                            ram_addr_t offset, size_t size)
  63 {
  64     return RAM_SAVE_CONTROL_NOT_SUPP;
  65 }
  66 #endif
  67 #endif