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block: Eliminate the S_1KiB, S_2KiB, ... macros

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We define 54 macros for the powers of two >= 1024.  We use six, in six
macro definitions.  Four of them could just as well use the common MiB
macro, so do that.  The remaining two can't, because they get passed
to stringify.  Replace the macro by the literal number there.
Slightly harder to read in one instance (1048576 vs. S_1MiB), so add a
comment there.  The other instance is a wash: 65536 vs S_64KiB.  65536
has been good enough for more than seven years there.

This effectively reverts commit 540b849261 and 1240ac558d.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Markus Armbruster 2019-01-11 20:14:01 +01:00 committed by Kevin Wolf
parent d09ea2d227
commit 14632122b8
3 changed files with 7 additions and 79 deletions
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10
block/qcow2.h
View File

@ -50,11 +50,11 @@
/* 8 MB refcount table is enough for 2 PB images at 64k cluster size
* (128 GB for 512 byte clusters, 2 EB for 2 MB clusters) */
#define QCOW_MAX_REFTABLE_SIZE S_8MiB
#define QCOW_MAX_REFTABLE_SIZE (8 * MiB)
/* 32 MB L1 table is enough for 2 PB images at 64k cluster size
* (128 GB for 512 byte clusters, 2 EB for 2 MB clusters) */
#define QCOW_MAX_L1_SIZE S_32MiB
#define QCOW_MAX_L1_SIZE (32 * MiB)
/* Allow for an average of 1k per snapshot table entry, should be plenty of
* space for snapshot names and IDs */
@ -81,15 +81,15 @@
#define MIN_REFCOUNT_CACHE_SIZE 4 /* clusters */
#ifdef CONFIG_LINUX
#define DEFAULT_L2_CACHE_MAX_SIZE S_32MiB
#define DEFAULT_L2_CACHE_MAX_SIZE (32 * MiB)
#define DEFAULT_CACHE_CLEAN_INTERVAL 600 /* seconds */
#else
#define DEFAULT_L2_CACHE_MAX_SIZE S_8MiB
#define DEFAULT_L2_CACHE_MAX_SIZE (8 * MiB)
/* Cache clean interval is currently available only on Linux, so must be 0 */
#define DEFAULT_CACHE_CLEAN_INTERVAL 0
#endif
#define DEFAULT_CLUSTER_SIZE S_64KiB
#define DEFAULT_CLUSTER_SIZE 65536
#define QCOW2_OPT_LAZY_REFCOUNTS "lazy-refcounts"
#define QCOW2_OPT_DISCARD_REQUEST "pass-discard-request"

3
block/vdi.c
View File

@ -85,7 +85,8 @@
#define BLOCK_OPT_STATIC "static"
#define SECTOR_SIZE 512
#define DEFAULT_CLUSTER_SIZE S_1MiB
#define DEFAULT_CLUSTER_SIZE 1048576
/* Note: can't use 1 * MiB, because it's passed to stringify() */
#if defined(CONFIG_VDI_DEBUG)
#define VDI_DEBUG 1

73
include/qemu/units.h
View File

@ -17,77 +17,4 @@
#define PiB (INT64_C(1) << 50)
#define EiB (INT64_C(1) << 60)
/*
* The following lookup table is intended to be used when a literal string of
* the number of bytes is required (for example if it needs to be stringified).
* It can also be used for generic shortcuts of power-of-two sizes.
* This table is generated using the AWK script below:
*
* BEGIN {
* suffix="KMGTPE";
* for(i=10; i<64; i++) {
* val=2**i;
* s=substr(suffix, int(i/10), 1);
* n=2**(i%10);
* pad=21-int(log(n)/log(10));
* printf("#define S_%d%siB %*d\n", n, s, pad, val);
* }
* }
*/
#define S_1KiB 1024
#define S_2KiB 2048
#define S_4KiB 4096
#define S_8KiB 8192
#define S_16KiB 16384
#define S_32KiB 32768
#define S_64KiB 65536
#define S_128KiB 131072
#define S_256KiB 262144
#define S_512KiB 524288
#define S_1MiB 1048576
#define S_2MiB 2097152
#define S_4MiB 4194304
#define S_8MiB 8388608
#define S_16MiB 16777216
#define S_32MiB 33554432
#define S_64MiB 67108864
#define S_128MiB 134217728
#define S_256MiB 268435456
#define S_512MiB 536870912
#define S_1GiB 1073741824
#define S_2GiB 2147483648
#define S_4GiB 4294967296
#define S_8GiB 8589934592
#define S_16GiB 17179869184
#define S_32GiB 34359738368
#define S_64GiB 68719476736
#define S_128GiB 137438953472
#define S_256GiB 274877906944
#define S_512GiB 549755813888
#define S_1TiB 1099511627776
#define S_2TiB 2199023255552
#define S_4TiB 4398046511104
#define S_8TiB 8796093022208
#define S_16TiB 17592186044416
#define S_32TiB 35184372088832
#define S_64TiB 70368744177664
#define S_128TiB 140737488355328
#define S_256TiB 281474976710656
#define S_512TiB 562949953421312
#define S_1PiB 1125899906842624
#define S_2PiB 2251799813685248
#define S_4PiB 4503599627370496
#define S_8PiB 9007199254740992
#define S_16PiB 18014398509481984
#define S_32PiB 36028797018963968
#define S_64PiB 72057594037927936
#define S_128PiB 144115188075855872
#define S_256PiB 288230376151711744
#define S_512PiB 576460752303423488
#define S_1EiB 1152921504606846976
#define S_2EiB 2305843009213693952
#define S_4EiB 4611686018427387904
#define S_8EiB 9223372036854775808
#endif