From 628d40d9579ef33635e8a13d3a5cd565e09c5708 Mon Sep 17 00:00:00 2001
From: Laurent Vivier <Laurent@lvivier.info>
Date: Wed, 20 Sep 2006 21:47:43 +0000
Subject: [PATCH] add emile_first_set_param_scsi_extents

---
 libemile/Makefile                             |  3 +-
 libemile/emile_first_set_param_scsi_extents.c | 66 +++++++++++++++++++
 libemile/libemile.h                           |  3 +
 3 files changed, 71 insertions(+), 1 deletion(-)
 create mode 100644 libemile/emile_first_set_param_scsi_extents.c

diff --git a/libemile/Makefile b/libemile/Makefile
index e45be21..492abf5 100644
--- a/libemile/Makefile
+++ b/libemile/Makefile
@@ -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
 
diff --git a/libemile/emile_first_set_param_scsi_extents.c b/libemile/emile_first_set_param_scsi_extents.c
new file mode 100644
index 0000000..6d9a524
--- /dev/null
+++ b/libemile/emile_first_set_param_scsi_extents.c
@@ -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;
+}
diff --git a/libemile/libemile.h b/libemile/libemile.h
index a31ec8a..324c109 100644
--- a/libemile/libemile.h
+++ b/libemile/libemile.h
@@ -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,