hw/block/block.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 "sysemu/blockdev.h"
  11 #include "sysemu/block-backend.h"
  12 #include "hw/block/block.h"
  13 #include "qemu/error-report.h"
  14
  15 void blkconf_serial(BlockConf *conf, char **serial)
  16 {
  17     DriveInfo *dinfo;
  18
  19     if (!*serial) {
  20         /* try to fall back to value set with legacy -drive serial=... */
  21         dinfo = blk_legacy_dinfo(conf->blk);
  22         if (dinfo) {
  23             *serial = g_strdup(dinfo->serial);
  24         }
  25     }
  26 }
  27
  28 void blkconf_geometry(BlockConf *conf, int *ptrans,
  29                       unsigned cyls_max, unsigned heads_max, unsigned secs_max,
  30                       Error **errp)
  31 {
  32     DriveInfo *dinfo;
  33
  34     if (!conf->cyls && !conf->heads && !conf->secs) {
  35         /* try to fall back to value set with legacy -drive cyls=... */
  36         dinfo = blk_legacy_dinfo(conf->blk);
  37         if (dinfo) {
  38             conf->cyls  = dinfo->cyls;
  39             conf->heads = dinfo->heads;
  40             conf->secs  = dinfo->secs;
  41             if (ptrans) {
  42                 *ptrans = dinfo->trans;
  43             }
  44         }
  45     }
  46     if (!conf->cyls && !conf->heads && !conf->secs) {
  47         hd_geometry_guess(conf->blk,
  48                           &conf->cyls, &conf->heads, &conf->secs,
  49                           ptrans);
  50     } else if (ptrans && *ptrans == BIOS_ATA_TRANSLATION_AUTO) {
  51         *ptrans = hd_bios_chs_auto_trans(conf->cyls, conf->heads, conf->secs);
  52     }
  53     if (conf->cyls || conf->heads || conf->secs) {
  54         if (conf->cyls < 1 || conf->cyls > cyls_max) {
  55             error_setg(errp, "cyls must be between 1 and %u", cyls_max);
  56             return;
  57         }
  58         if (conf->heads < 1 || conf->heads > heads_max) {
  59             error_setg(errp, "heads must be between 1 and %u", heads_max);
  60             return;
  61         }
  62         if (conf->secs < 1 || conf->secs > secs_max) {
  63             error_setg(errp, "secs must be between 1 and %u", secs_max);
  64             return;
  65         }
  66     }
  67 }