LXR qemu/device-hotplug.c

   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
  25#include "qemu/osdep.h"
  26#include "hw/boards.h"
  27#include "sysemu/block-backend.h"
  28#include "sysemu/blockdev.h"
  29#include "qapi/qmp/qdict.h"
  30#include "qapi/error.h"
  31#include "qemu/config-file.h"
  32#include "qemu/option.h"
  33#include "sysemu/sysemu.h"
  34#include "monitor/monitor.h"
  35#include "block/block_int.h"
  36
  37static DriveInfo *add_init_drive(const char *optstr)
  38{
  39    Error *err = NULL;
  40    DriveInfo *dinfo;
  41    QemuOpts *opts;
  42    MachineClass *mc;
  43
  44    opts = drive_def(optstr);
  45    if (!opts)
  46        return NULL;
  47
  48    mc = MACHINE_GET_CLASS(current_machine);
  49    dinfo = drive_new(opts, mc->block_default_type, &err);
  50    if (err) {
  51        error_report_err(err);
  52        qemu_opts_del(opts);
  53        return NULL;
  54    }
  55
  56    return dinfo;
  57}
  58
  59void hmp_drive_add(Monitor *mon, const QDict *qdict)
  60{
  61    DriveInfo *dinfo = NULL;
  62    const char *opts = qdict_get_str(qdict, "opts");
  63    bool node = qdict_get_try_bool(qdict, "node", false);
  64
  65    if (node) {
  66        hmp_drive_add_node(mon, opts);
  67        return;
  68    }
  69
  70    dinfo = add_init_drive(opts);
  71    if (!dinfo) {
  72        goto err;
  73    }
  74
  75    switch (dinfo->type) {
  76    case IF_NONE:
  77        monitor_printf(mon, "OK\n");
  78        break;
  79    default:
  80        monitor_printf(mon, "Can't hot-add drive to type %d\n", dinfo->type);
  81        goto err;
  82    }
  83    return;
  84
  85err:
  86    if (dinfo) {
  87        BlockBackend *blk = blk_by_legacy_dinfo(dinfo);
  88        monitor_remove_blk(blk);
  89        blk_unref(blk);
  90    }
  91}
  92