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device-hotplug.c 2.6KB

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  1. /*
  2. * QEMU device hotplug helpers
  3. *
  4. * Copyright (c) 2004 Fabrice Bellard
  5. *
  6. * Permission is hereby granted, free of charge, to any person obtaining a copy
  7. * of this software and associated documentation files (the "Software"), to deal
  8. * in the Software without restriction, including without limitation the rights
  9. * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10. * copies of the Software, and to permit persons to whom the Software is
  11. * furnished to do so, subject to the following conditions:
  12. *
  13. * The above copyright notice and this permission notice shall be included in
  14. * all copies or substantial portions of the Software.
  15. *
  16. * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17. * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18. * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19. * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20. * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21. * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22. * THE SOFTWARE.
  23. */
  24. #include "qemu/osdep.h"
  25. #include "hw/boards.h"
  26. #include "sysemu/block-backend.h"
  27. #include "sysemu/blockdev.h"
  28. #include "qapi/qmp/qdict.h"
  29. #include "qapi/error.h"
  30. #include "qemu/config-file.h"
  31. #include "qemu/option.h"
  32. #include "sysemu/sysemu.h"
  33. #include "monitor/monitor.h"
  34. #include "block/block_int.h"
  35. static DriveInfo *add_init_drive(const char *optstr)
  36. {
  37. Error *err = NULL;
  38. DriveInfo *dinfo;
  39. QemuOpts *opts;
  40. MachineClass *mc;
  41. opts = drive_def(optstr);
  42. if (!opts)
  43. return NULL;
  44. mc = MACHINE_GET_CLASS(current_machine);
  45. dinfo = drive_new(opts, mc->block_default_type, &err);
  46. if (err) {
  47. error_report_err(err);
  48. qemu_opts_del(opts);
  49. return NULL;
  50. }
  51. return dinfo;
  52. }
  53. void hmp_drive_add(Monitor *mon, const QDict *qdict)
  54. {
  55. DriveInfo *dinfo = NULL;
  56. const char *opts = qdict_get_str(qdict, "opts");
  57. bool node = qdict_get_try_bool(qdict, "node", false);
  58. if (node) {
  59. hmp_drive_add_node(mon, opts);
  60. return;
  61. }
  62. dinfo = add_init_drive(opts);
  63. if (!dinfo) {
  64. goto err;
  65. }
  66. switch (dinfo->type) {
  67. case IF_NONE:
  68. monitor_printf(mon, "OK\n");
  69. break;
  70. default:
  71. monitor_printf(mon, "Can't hot-add drive to type %d\n", dinfo->type);
  72. goto err;
  73. }
  74. return;
  75. err:
  76. if (dinfo) {
  77. BlockBackend *blk = blk_by_legacy_dinfo(dinfo);
  78. monitor_remove_blk(blk);
  79. blk_unref(blk);
  80. }
  81. }