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_blocksizes(BlockConf *conf) 29 { 30 BlockBackend *blk = conf->blk; 31 BlockSizes blocksizes; 32 int backend_ret; 33 34 backend_ret = blk_probe_blocksizes(blk, &blocksizes); 35 /* fill in detected values if they are not defined via qemu command line */ 36 if (!conf->physical_block_size) { 37 if (!backend_ret) { 38 conf->physical_block_size = blocksizes.phys; 39 } else { 40 conf->physical_block_size = BDRV_SECTOR_SIZE; 41 } 42 } 43 if (!conf->logical_block_size) { 44 if (!backend_ret) { 45 conf->logical_block_size = blocksizes.log; 46 } else { 47 conf->logical_block_size = BDRV_SECTOR_SIZE; 48 } 49 } 50 } 51 52 void blkconf_geometry(BlockConf *conf, int *ptrans, 53 unsigned cyls_max, unsigned heads_max, unsigned secs_max, 54 Error **errp) 55 { 56 DriveInfo *dinfo; 57 58 if (!conf->cyls && !conf->heads && !conf->secs) { 59 /* try to fall back to value set with legacy -drive cyls=... */ 60 dinfo = blk_legacy_dinfo(conf->blk); 61 if (dinfo) { 62 conf->cyls = dinfo->cyls; 63 conf->heads = dinfo->heads; 64 conf->secs = dinfo->secs; 65 if (ptrans) { 66 *ptrans = dinfo->trans; 67 } 68 } 69 } 70 if (!conf->cyls && !conf->heads && !conf->secs) { 71 hd_geometry_guess(conf->blk, 72 &conf->cyls, &conf->heads, &conf->secs, 73 ptrans); 74 } else if (ptrans && *ptrans == BIOS_ATA_TRANSLATION_AUTO) { 75 *ptrans = hd_bios_chs_auto_trans(conf->cyls, conf->heads, conf->secs); 76 } 77 if (conf->cyls || conf->heads || conf->secs) { 78 if (conf->cyls < 1 || conf->cyls > cyls_max) { 79 error_setg(errp, "cyls must be between 1 and %u", cyls_max); 80 return; 81 } 82 if (conf->heads < 1 || conf->heads > heads_max) { 83 error_setg(errp, "heads must be between 1 and %u", heads_max); 84 return; 85 } 86 if (conf->secs < 1 || conf->secs > secs_max) { 87 error_setg(errp, "secs must be between 1 and %u", secs_max); 88 return; 89 } 90 } 91 } 92