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 "hw/hw.h"
  26 #include "hw/boards.h"
  27 #include "sysemu/block-backend.h"
  28 #include "sysemu/blockdev.h"
  29 #include "qemu/config-file.h"
  30 #include "sysemu/sysemu.h"
  31 #include "monitor/monitor.h"
  32
  33 static DriveInfo *add_init_drive(const char *optstr)
  34 {
  35     DriveInfo *dinfo;
  36     QemuOpts *opts;
  37     MachineClass *mc;
  38
  39     opts = drive_def(optstr);
  40     if (!opts)
  41         return NULL;
  42
  43     mc = MACHINE_GET_CLASS(current_machine);
  44     dinfo = drive_new(opts, mc->block_default_type);
  45     if (!dinfo) {
  46         qemu_opts_del(opts);
  47         return NULL;
  48     }
  49
  50     return dinfo;
  51 }
  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
  58     dinfo = add_init_drive(opts);
  59     if (!dinfo) {
  60         goto err;
  61     }
  62     if (dinfo->devaddr) {
  63         monitor_printf(mon, "Parameter addr not supported\n");
  64         goto err;
  65     }
  66
  67     switch (dinfo->type) {
  68     case IF_NONE:
  69         monitor_printf(mon, "OK\n");
  70         break;
  71     default:
  72         monitor_printf(mon, "Can't hot-add drive to type %d\n", dinfo->type);
  73         goto err;
  74     }
  75     return;
  76
  77 err:
  78     if (dinfo) {
  79         blk_unref(blk_by_legacy_dinfo(dinfo));
  80     }
  81 }