2 * Common code for block device models
4 * Copyright (C) 2012 Red Hat, Inc.
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.
10 #include "qemu/osdep.h"
11 #include "sysemu/blockdev.h"
12 #include "sysemu/block-backend.h"
13 #include "hw/block/block.h"
14 #include "qapi/error.h"
15 #include "qemu/error-report.h"
17 void blkconf_serial(BlockConf *conf, char **serial)
22 /* try to fall back to value set with legacy -drive serial=... */
23 dinfo = blk_legacy_dinfo(conf->blk);
25 *serial = g_strdup(dinfo->serial);
30 void blkconf_blocksizes(BlockConf *conf)
32 BlockBackend *blk = conf->blk;
33 BlockSizes blocksizes;
36 backend_ret = blk_probe_blocksizes(blk, &blocksizes);
37 /* fill in detected values if they are not defined via qemu command line */
38 if (!conf->physical_block_size) {
40 conf->physical_block_size = blocksizes.phys;
42 conf->physical_block_size = BDRV_SECTOR_SIZE;
45 if (!conf->logical_block_size) {
47 conf->logical_block_size = blocksizes.log;
49 conf->logical_block_size = BDRV_SECTOR_SIZE;
54 void blkconf_apply_backend_options(BlockConf *conf)
56 BlockBackend *blk = conf->blk;
60 case ON_OFF_AUTO_ON: wce = true; break;
61 case ON_OFF_AUTO_OFF: wce = false; break;
62 case ON_OFF_AUTO_AUTO: wce = blk_enable_write_cache(blk); break;
67 blk_set_enable_write_cache(blk, wce);
70 void blkconf_geometry(BlockConf *conf, int *ptrans,
71 unsigned cyls_max, unsigned heads_max, unsigned secs_max,
76 if (!conf->cyls && !conf->heads && !conf->secs) {
77 /* try to fall back to value set with legacy -drive cyls=... */
78 dinfo = blk_legacy_dinfo(conf->blk);
80 conf->cyls = dinfo->cyls;
81 conf->heads = dinfo->heads;
82 conf->secs = dinfo->secs;
84 *ptrans = dinfo->trans;
88 if (!conf->cyls && !conf->heads && !conf->secs) {
89 hd_geometry_guess(conf->blk,
90 &conf->cyls, &conf->heads, &conf->secs,
92 } else if (ptrans && *ptrans == BIOS_ATA_TRANSLATION_AUTO) {
93 *ptrans = hd_bios_chs_auto_trans(conf->cyls, conf->heads, conf->secs);
95 if (conf->cyls || conf->heads || conf->secs) {
96 if (conf->cyls < 1 || conf->cyls > cyls_max) {
97 error_setg(errp, "cyls must be between 1 and %u", cyls_max);
100 if (conf->heads < 1 || conf->heads > heads_max) {
101 error_setg(errp, "heads must be between 1 and %u", heads_max);
104 if (conf->secs < 1 || conf->secs > secs_max) {
105 error_setg(errp, "secs must be between 1 and %u", secs_max);