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/*
* lib/part/chs.c
*
* Update CHS values when they're not valid
*/
#include <assert.h>
#include <stdlib.h>
#include "util/debug.h"
#include "util/error.h"
#include "part/part.h"
static void part_calcchs(chs_t *chs, geometry_t *geo, blk_t blk)
{
chs->sector = blk % geo->sectors;
chs->head = (blk /= geo->sectors) % geo->heads;
chs->cylinder = blk /= geo->heads;
}
/* Prototype: u_int part_updatechs(part_t *part, partinfo_t *pinfo)
* Purpose : Update CHS values if they have become invalid
* Params : part - partitionable device
* : pinfo - partition to update
* Returns : FALSE on error
*/
u_int part_updatechs(part_t *part, partinfo_t *pinfo)
{
geometry_t geo;
u_int ret = 0;
assert(part != NULL);
assert(pinfo != NULL);
dbg_printf("part_updatechs([bs=0x%X, be=0x%X, type=0x%X])",
pinfo->blk_start, pinfo->blk_end, pinfo->type);
dbg_level_up();
if (pinfo->chs_valid == 0) {
if (!blkio_getgeometry(part->blkio, &geo))
set_error("unable to get geometry");
else {
part_calcchs(&pinfo->chs_start, &geo, pinfo->blk_start);
part_calcchs(&pinfo->chs_end, &geo, pinfo->blk_end);
pinfo->chs_valid = 1;
ret = 1;
}
} else
ret = 1;
dbg_printf("start=[C=%d,H=%d,S=%d] end=[C=%d,H=%d,S=%d]",
pinfo->chs_start.cylinder, pinfo->chs_start.head, pinfo->chs_start.sector,
pinfo->chs_end.cylinder, pinfo->chs_end.head, pinfo->chs_end.sector);
dbg_level_down();
dbg_printf("ret %s", ret ? "ok" : "error");
return ret;
}
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