hw/block-common.c

   1 /*
   2  * Common code for block device models
   3  *
   4  * Copyright (C) 2012 Red Hat, Inc.
   5  *
   6  * This work is licensed under the terms of the GNU GPL, version 2 or
   7  * later.  See the COPYING file in the top-level directory.
   8  */
   9
  10 #include "blockdev.h"
  11 #include "hw/block-common.h"
  12 #include "qemu-error.h"
  13
  14 void blkconf_serial(BlockConf *conf, char **serial)
  15 {
  16     DriveInfo *dinfo;
  17
  18     if (!*serial) {
  19         /* try to fall back to value set with legacy -drive serial=... */
  20         dinfo = drive_get_by_blockdev(conf->bs);
  21         if (dinfo->serial) {
  22             *serial = g_strdup(dinfo->serial);
  23         }
  24     }
  25 }
  26
  27 int blkconf_geometry(BlockConf *conf, int *ptrans,
  28                      unsigned cyls_max, unsigned heads_max, unsigned secs_max)
  29 {
  30     DriveInfo *dinfo;
  31
  32     if (!conf->cyls && !conf->heads && !conf->secs) {
  33         /* try to fall back to value set with legacy -drive cyls=... */
  34         dinfo = drive_get_by_blockdev(conf->bs);
  35         conf->cyls  = dinfo->cyls;
  36         conf->heads = dinfo->heads;
  37         conf->secs  = dinfo->secs;
  38         if (ptrans) {
  39             *ptrans = dinfo->trans;
  40         }
  41     }
  42     if (!conf->cyls && !conf->heads && !conf->secs) {
  43         hd_geometry_guess(conf->bs,
  44                           &conf->cyls, &conf->heads, &conf->secs,
  45                           ptrans);
  46     } else if (ptrans && *ptrans == BIOS_ATA_TRANSLATION_AUTO) {
  47         *ptrans = hd_bios_chs_auto_trans(conf->cyls, conf->heads, conf->secs);
  48     }
  49     if (conf->cyls || conf->heads || conf->secs) {
  50         if (conf->cyls < 1 || conf->cyls > cyls_max) {
  51             error_report("cyls must be between 1 and %u", cyls_max);
  52             return -1;
  53         }
  54         if (conf->heads < 1 || conf->heads > heads_max) {
  55             error_report("heads must be between 1 and %u", heads_max);
  56             return -1;
  57         }
  58         if (conf->secs < 1 || conf->secs > secs_max) {
  59             error_report("secs must be between 1 and %u", secs_max);
  60             return -1;
  61         }
  62     }
  63     return 0;
  64 }