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