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
  37 static 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
  59 void 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
  85 err:
  86     if (dinfo) {
  87         BlockBackend *blk = blk_by_legacy_dinfo(dinfo);
  88         monitor_remove_blk(blk);
  89         blk_unref(blk);
  90     }
  91 }