mirror of https://gitlab.com/qemu-project/qemu
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
45 lines
1.1 KiB
C
45 lines
1.1 KiB
C
/*
|
|
* Block utility functions
|
|
*
|
|
* Copyright IBM, Corp. 2011
|
|
* Copyright (c) 2020 Coiby Xu <coiby.xu@gmail.com>
|
|
*
|
|
* This work is licensed under the terms of the GNU GPL, version 2 or later.
|
|
* See the COPYING file in the top-level directory.
|
|
*/
|
|
|
|
#include "qemu/osdep.h"
|
|
#include "qapi/error.h"
|
|
#include "block-helpers.h"
|
|
|
|
/**
|
|
* check_block_size:
|
|
* @name: The name of the property being validated
|
|
* @value: The block size in bytes
|
|
* @errp: A pointer to an area to store an error
|
|
*
|
|
* This function checks that the block size meets the following conditions:
|
|
* 1. At least MIN_BLOCK_SIZE
|
|
* 2. No larger than MAX_BLOCK_SIZE
|
|
* 3. A power of 2
|
|
*
|
|
* Returns: true on success, false on failure
|
|
*/
|
|
bool check_block_size(const char *name, int64_t value, Error **errp)
|
|
{
|
|
if (!value) {
|
|
/* unset */
|
|
return true;
|
|
}
|
|
|
|
if (value < MIN_BLOCK_SIZE || value > MAX_BLOCK_SIZE
|
|
|| (value & (value - 1))) {
|
|
error_setg(errp,
|
|
"parameter %s must be a power of 2 between %" PRId64
|
|
" and %" PRId64,
|
|
name, MIN_BLOCK_SIZE, MAX_BLOCK_SIZE);
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|