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 "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" 16 17 void blkconf_serial(BlockConf *conf, char **serial) 18 { 19 DriveInfo *dinfo; 20 21 if (!*serial) { 22 /* try to fall back to value set with legacy -drive serial=... */ 23 dinfo = blk_legacy_dinfo(conf->blk); 24 if (dinfo) { 25 *serial = g_strdup(dinfo->serial); 26 } 27 } 28 } 29 30 void blkconf_blocksizes(BlockConf *conf) 31 { 32 BlockBackend *blk = conf->blk; 33 BlockSizes blocksizes; 34 int backend_ret; 35 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) { 39 if (!backend_ret) { 40 conf->physical_block_size = blocksizes.phys; 41 } else { 42 conf->physical_block_size = BDRV_SECTOR_SIZE; 43 } 44 } 45 if (!conf->logical_block_size) { 46 if (!backend_ret) { 47 conf->logical_block_size = blocksizes.log; 48 } else { 49 conf->logical_block_size = BDRV_SECTOR_SIZE; 50 } 51 } 52 } 53 54 void blkconf_geometry(BlockConf *conf, int *ptrans, 55 unsigned cyls_max, unsigned heads_max, unsigned secs_max, 56 Error **errp) 57 { 58 DriveInfo *dinfo; 59 60 if (!conf->cyls && !conf->heads && !conf->secs) { 61 /* try to fall back to value set with legacy -drive cyls=... */ 62 dinfo = blk_legacy_dinfo(conf->blk); 63 if (dinfo) { 64 conf->cyls = dinfo->cyls; 65 conf->heads = dinfo->heads; 66 conf->secs = dinfo->secs; 67 if (ptrans) { 68 *ptrans = dinfo->trans; 69 } 70 } 71 } 72 if (!conf->cyls && !conf->heads && !conf->secs) { 73 hd_geometry_guess(conf->blk, 74 &conf->cyls, &conf->heads, &conf->secs, 75 ptrans); 76 } else if (ptrans && *ptrans == BIOS_ATA_TRANSLATION_AUTO) { 77 *ptrans = hd_bios_chs_auto_trans(conf->cyls, conf->heads, conf->secs); 78 } 79 if (conf->cyls || conf->heads || conf->secs) { 80 if (conf->cyls < 1 || conf->cyls > cyls_max) { 81 error_setg(errp, "cyls must be between 1 and %u", cyls_max); 82 return; 83 } 84 if (conf->heads < 1 || conf->heads > heads_max) { 85 error_setg(errp, "heads must be between 1 and %u", heads_max); 86 return; 87 } 88 if (conf->secs < 1 || conf->secs > secs_max) { 89 error_setg(errp, "secs must be between 1 and %u", secs_max); 90 return; 91 } 92 } 93 } 94