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add emile_first_set_param_scsi_extents

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This commit is contained in:
Laurent Vivier 2006-09-20 21:47:43 +00:00
parent a28a9d0cc0
commit 628d40d957
3 changed files with 71 additions and 1 deletions
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3
libemile/Makefile
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@ -39,7 +39,8 @@ SOURCES = emile_block0_write.c emile_checksum.c emile_first_get_param.c \
emile_second_set_configuration.c emile_second_get_next_property.c \
emile_second_get_property.c emile_second_set_property.c \
emile_second_remove_property.c emile_second_create_mapfile.c \
emile_second_set_param.c emile_second_get_param.c
emile_second_set_param.c emile_second_get_param.c \
emile_first_set_param_scsi_extents.c
HEADERS = emile.h libemile.h partition.h bootblock.h

66
libemile/emile_first_set_param_scsi_extents.c Normal file
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@ -0,0 +1,66 @@
static __attribute__((used)) char* rcsid = "$CVSHeader$";
/*
*
* (c) 2004-2006 Laurent Vivier <Laurent@lvivier.info>
*
*/
#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <fcntl.h>
#include "libemile.h"
#include "emile.h"
#define BLOCK_SIZE 512 /* FIXME: should ask the disk driver */
int emile_first_set_param_scsi_extents( int fd, int drive_num, int second_offset, int size)
{
int fd;
int ret;
char first[1024];
int current;
unsigned short max_blocks;
int location;
location = lseek(fd, 0, SEEK_CUR);
if (location == -1)
return EEMILE_CANNOT_READ_FIRST;
ret = read(fd, first, 1024);
if (ret == -1)
return EEMILE_CANNOT_READ_FIRST;
max_blocks = read_short((u_int16_t*)&first[1022]) / 6;
write_short((u_int16_t*)&first[1014], BLOCK_SIZE);
write_short((u_int16_t*)&first[1016], drive_num);
write_long((u_int32_t*)&first[1018], 0);
current = 1014;
current -= 2;
write_short((u_int16_t*)&first[current], (size + BLOCK_SIZE - 1) / BLOCK_SIZE);
current -= 4;
write_long((u_int32_t*)&first[current], second_offset);
/* mark end of blocks list */
current -= 2;
write_short((u_int16_t*)(&first[current]), 0);
/* set second level size */
write_long((u_int32_t*)&first[1018], (size + BLOCK_SIZE - 1) / BLOCK_SIZE * BLOCK_SIZE);
ret = lseek(fd, location, SEEK_SET);
if (ret != 0)
return EEMILE_CANNOT_WRITE_FIRST;
ret = write(fd, first, 1024);
if (ret == -1)
return EEMILE_CANNOT_WRITE_FIRST;
return 0;
}

3
libemile/libemile.h
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@ -78,6 +78,9 @@ extern int emile_first_set_param(int fd, unsigned short tune_mask,
extern int emile_first_get_param(int fd, int *drive_num, int *second_offset,
int *second_size);
extern int emile_first_set_param_scsi(int fd, char *second_name);
extern int emile_first_set_param_scsi_extents(int fd,
int drive_num, int second_offset,
int second_size);
struct emile_container *emile_second_create_mapfile(short *unit_id, char *mapfile, char* kernel);
extern int emile_is_url(char *path);
extern int emile_floppy_create_image(char* first_level, char* second_level,