2 * Common code for block device models
4 * Copyright (C) 2012 Red Hat, Inc.
5 * Copyright (c) 2003-2008 Fabrice Bellard
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.
14 #include "qemu-common.h"
15 #include "qapi/qapi-types-block-core.h"
19 typedef struct BlockConf
{
21 uint16_t physical_block_size
;
22 uint16_t logical_block_size
;
26 uint32_t discard_granularity
;
27 /* geometry, not all devices use this */
28 uint32_t cyls
, heads
, secs
;
31 BlockdevOnError rerror
;
32 BlockdevOnError werror
;
35 static inline unsigned int get_physical_block_exp(BlockConf
*conf
)
37 unsigned int exp
= 0, size
;
39 for (size
= conf
->physical_block_size
;
40 size
> conf
->logical_block_size
;
48 #define DEFINE_BLOCK_PROPERTIES(_state, _conf) \
49 DEFINE_PROP_DRIVE("drive", _state, _conf.blk), \
50 DEFINE_PROP_BLOCKSIZE("logical_block_size", _state, \
51 _conf.logical_block_size), \
52 DEFINE_PROP_BLOCKSIZE("physical_block_size", _state, \
53 _conf.physical_block_size), \
54 DEFINE_PROP_UINT16("min_io_size", _state, _conf.min_io_size, 0), \
55 DEFINE_PROP_UINT32("opt_io_size", _state, _conf.opt_io_size, 0), \
56 DEFINE_PROP_UINT32("discard_granularity", _state, \
57 _conf.discard_granularity, -1), \
58 DEFINE_PROP_ON_OFF_AUTO("write-cache", _state, _conf.wce, \
60 DEFINE_PROP_BOOL("share-rw", _state, _conf.share_rw, false)
62 #define DEFINE_BLOCK_CHS_PROPERTIES(_state, _conf) \
63 DEFINE_PROP_UINT32("cyls", _state, _conf.cyls, 0), \
64 DEFINE_PROP_UINT32("heads", _state, _conf.heads, 0), \
65 DEFINE_PROP_UINT32("secs", _state, _conf.secs, 0)
67 #define DEFINE_BLOCK_ERROR_PROPERTIES(_state, _conf) \
68 DEFINE_PROP_BLOCKDEV_ON_ERROR("rerror", _state, _conf.rerror, \
69 BLOCKDEV_ON_ERROR_AUTO), \
70 DEFINE_PROP_BLOCKDEV_ON_ERROR("werror", _state, _conf.werror, \
71 BLOCKDEV_ON_ERROR_AUTO)
73 /* Configuration helpers */
75 void blkconf_serial(BlockConf
*conf
, char **serial
);
76 bool blkconf_geometry(BlockConf
*conf
, int *trans
,
77 unsigned cyls_max
, unsigned heads_max
, unsigned secs_max
,
79 void blkconf_blocksizes(BlockConf
*conf
);
80 bool blkconf_apply_backend_options(BlockConf
*conf
, bool readonly
,
81 bool resizable
, Error
**errp
);
83 /* Hard disk geometry */
85 void hd_geometry_guess(BlockBackend
*blk
,
86 uint32_t *pcyls
, uint32_t *pheads
, uint32_t *psecs
,
88 int hd_bios_chs_auto_trans(uint32_t cyls
, uint32_t heads
, uint32_t secs
);