block.h (4385B)
1 /* 2 * Common code for block device models 3 * 4 * Copyright (C) 2012 Red Hat, Inc. 5 * Copyright (c) 2003-2008 Fabrice Bellard 6 * 7 * This work is licensed under the terms of the GNU GPL, version 2 or 8 * later. See the COPYING file in the top-level directory. 9 */ 10 11 #ifndef HW_BLOCK_H 12 #define HW_BLOCK_H 13 14 #include "exec/hwaddr.h" 15 #include "qapi/qapi-types-block-core.h" 16 #include "hw/qdev-properties-system.h" 17 18 /* Configuration */ 19 20 typedef struct BlockConf { 21 BlockBackend *blk; 22 OnOffAuto backend_defaults; 23 uint32_t physical_block_size; 24 uint32_t logical_block_size; 25 uint32_t min_io_size; 26 uint32_t opt_io_size; 27 int32_t bootindex; 28 uint32_t discard_granularity; 29 /* geometry, not all devices use this */ 30 uint32_t cyls, heads, secs; 31 uint32_t lcyls, lheads, lsecs; 32 OnOffAuto wce; 33 bool share_rw; 34 OnOffAuto account_invalid, account_failed; 35 BlockdevOnError rerror; 36 BlockdevOnError werror; 37 } BlockConf; 38 39 static inline unsigned int get_physical_block_exp(BlockConf *conf) 40 { 41 unsigned int exp = 0, size; 42 43 for (size = conf->physical_block_size; 44 size > conf->logical_block_size; 45 size >>= 1) { 46 exp++; 47 } 48 49 return exp; 50 } 51 52 #define DEFINE_BLOCK_PROPERTIES_BASE(_state, _conf) \ 53 DEFINE_PROP_ON_OFF_AUTO("backend_defaults", _state, \ 54 _conf.backend_defaults, ON_OFF_AUTO_AUTO), \ 55 DEFINE_PROP_BLOCKSIZE("logical_block_size", _state, \ 56 _conf.logical_block_size), \ 57 DEFINE_PROP_BLOCKSIZE("physical_block_size", _state, \ 58 _conf.physical_block_size), \ 59 DEFINE_PROP_SIZE32("min_io_size", _state, _conf.min_io_size, 0), \ 60 DEFINE_PROP_SIZE32("opt_io_size", _state, _conf.opt_io_size, 0), \ 61 DEFINE_PROP_SIZE32("discard_granularity", _state, \ 62 _conf.discard_granularity, -1), \ 63 DEFINE_PROP_ON_OFF_AUTO("write-cache", _state, _conf.wce, \ 64 ON_OFF_AUTO_AUTO), \ 65 DEFINE_PROP_BOOL("share-rw", _state, _conf.share_rw, false), \ 66 DEFINE_PROP_ON_OFF_AUTO("account-invalid", _state, \ 67 _conf.account_invalid, ON_OFF_AUTO_AUTO), \ 68 DEFINE_PROP_ON_OFF_AUTO("account-failed", _state, \ 69 _conf.account_failed, ON_OFF_AUTO_AUTO) 70 71 #define DEFINE_BLOCK_PROPERTIES(_state, _conf) \ 72 DEFINE_PROP_DRIVE("drive", _state, _conf.blk), \ 73 DEFINE_BLOCK_PROPERTIES_BASE(_state, _conf) 74 75 #define DEFINE_BLOCK_CHS_PROPERTIES(_state, _conf) \ 76 DEFINE_PROP_UINT32("cyls", _state, _conf.cyls, 0), \ 77 DEFINE_PROP_UINT32("heads", _state, _conf.heads, 0), \ 78 DEFINE_PROP_UINT32("secs", _state, _conf.secs, 0), \ 79 DEFINE_PROP_UINT32("lcyls", _state, _conf.lcyls, 0), \ 80 DEFINE_PROP_UINT32("lheads", _state, _conf.lheads, 0), \ 81 DEFINE_PROP_UINT32("lsecs", _state, _conf.lsecs, 0) 82 83 #define DEFINE_BLOCK_ERROR_PROPERTIES(_state, _conf) \ 84 DEFINE_PROP_BLOCKDEV_ON_ERROR("rerror", _state, _conf.rerror, \ 85 BLOCKDEV_ON_ERROR_AUTO), \ 86 DEFINE_PROP_BLOCKDEV_ON_ERROR("werror", _state, _conf.werror, \ 87 BLOCKDEV_ON_ERROR_AUTO) 88 89 /* Backend access helpers */ 90 91 bool blk_check_size_and_read_all(BlockBackend *blk, void *buf, hwaddr size, 92 Error **errp); 93 94 /* Configuration helpers */ 95 96 bool blkconf_geometry(BlockConf *conf, int *trans, 97 unsigned cyls_max, unsigned heads_max, unsigned secs_max, 98 Error **errp); 99 bool blkconf_blocksizes(BlockConf *conf, Error **errp); 100 bool blkconf_apply_backend_options(BlockConf *conf, bool readonly, 101 bool resizable, Error **errp); 102 103 /* Hard disk geometry */ 104 105 void hd_geometry_guess(BlockBackend *blk, 106 uint32_t *pcyls, uint32_t *pheads, uint32_t *psecs, 107 int *ptrans); 108 int hd_bios_chs_auto_trans(uint32_t cyls, uint32_t heads, uint32_t secs); 109 110 #endif