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_apply_backend_options(BlockConf *conf) 55 { 56 BlockBackend *blk = conf->blk; 57 BlockdevOnError rerror, werror; 58 bool wce; 59 60 switch (conf->wce) { 61 case ON_OFF_AUTO_ON: wce = true; break; 62 case ON_OFF_AUTO_OFF: wce = false; break; 63 case ON_OFF_AUTO_AUTO: wce = blk_enable_write_cache(blk); break; 64 default: 65 abort(); 66 } 67 68 rerror = conf->rerror; 69 if (rerror == BLOCKDEV_ON_ERROR_AUTO) { 70 rerror = blk_get_on_error(blk, true); 71 } 72 73 werror = conf->werror; 74 if (werror == BLOCKDEV_ON_ERROR_AUTO) { 75 werror = blk_get_on_error(blk, false); 76 } 77 78 blk_set_enable_write_cache(blk, wce); 79 blk_set_on_error(blk, rerror, werror); 80 } 81 82 void blkconf_geometry(BlockConf *conf, int *ptrans, 83 unsigned cyls_max, unsigned heads_max, unsigned secs_max, 84 Error **errp) 85 { 86 DriveInfo *dinfo; 87 88 if (!conf->cyls && !conf->heads && !conf->secs) { 89 /* try to fall back to value set with legacy -drive cyls=... */ 90 dinfo = blk_legacy_dinfo(conf->blk); 91 if (dinfo) { 92 conf->cyls = dinfo->cyls; 93 conf->heads = dinfo->heads; 94 conf->secs = dinfo->secs; 95 if (ptrans) { 96 *ptrans = dinfo->trans; 97 } 98 } 99 } 100 if (!conf->cyls && !conf->heads && !conf->secs) { 101 hd_geometry_guess(conf->blk, 102 &conf->cyls, &conf->heads, &conf->secs, 103 ptrans); 104 } else if (ptrans && *ptrans == BIOS_ATA_TRANSLATION_AUTO) { 105 *ptrans = hd_bios_chs_auto_trans(conf->cyls, conf->heads, conf->secs); 106 } 107 if (conf->cyls || conf->heads || conf->secs) { 108 if (conf->cyls < 1 || conf->cyls > cyls_max) { 109 error_setg(errp, "cyls must be between 1 and %u", cyls_max); 110 return; 111 } 112 if (conf->heads < 1 || conf->heads > heads_max) { 113 error_setg(errp, "heads must be between 1 and %u", heads_max); 114 return; 115 } 116 if (conf->secs < 1 || conf->secs > secs_max) { 117 error_setg(errp, "secs must be between 1 and %u", secs_max); 118 return; 119 } 120 } 121 } 122