Commit 00af2b26 authored by bellard's avatar bellard
Browse files

added cow.h


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@653 c046a42c-6fe2-441c-8c8c-71466251a162
parent a735aa31
......@@ -45,6 +45,8 @@
#define NO_THUNK_TYPE_SIZE
#include "thunk.h"
#include "cow.h"
struct BlockDriverState {
int fd; /* if -1, only COW mappings */
int64_t total_sectors;
......
/* user mode linux compatible COW file */
#define COW_MAGIC 0x4f4f4f4d /* MOOO */
#define COW_VERSION 2
struct cow_header_v2 {
uint32_t magic;
uint32_t version;
char backing_file[1024];
int32_t mtime;
uint64_t size;
uint32_t sectorsize;
};
......@@ -41,7 +41,7 @@
#include <sys/stat.h>
#include <netinet/in.h>
#include "vl.h"
#include "cow.h"
#include "bswap.h"
......@@ -101,13 +101,14 @@ void help(void)
int main(int argc, char **argv)
{
const char *image_filename, *cow_filename;
int cow_fd, c, nb_args;
int cow_fd, c, nb_args, simple_image;
int64_t image_size;
image_filename = NULL;
image_size = 0;
simple_image = 0;
for(;;) {
c = getopt(argc, argv, "hf:");
c = getopt(argc, argv, "hf:s");
if (c == -1)
break;
switch(c) {
......@@ -117,6 +118,9 @@ int main(int argc, char **argv)
case 'f':
image_filename = optarg;
break;
case 's':
simple_image = 1;
break;
}
}
if (!image_filename)
......@@ -131,12 +135,16 @@ int main(int argc, char **argv)
image_size = (int64_t)atoi(argv[optind + 1]) * 2 * 1024;
}
cow_fd = open(cow_filename, O_RDWR | O_CREAT | O_TRUNC, 0644);
cow_fd = open(cow_filename, O_RDWR | O_CREAT | O_TRUNC | O_LARGEFILE, 0644);
if (!cow_fd < 0)
return -1;
if (cow_create(cow_fd, image_filename, image_size) < 0) {
fprintf(stderr, "%s: error while formating\n", cow_filename);
exit(1);
if (simple_image) {
ftruncate64(cow_fd, image_size * 512);
} else {
if (cow_create(cow_fd, image_filename, image_size) < 0) {
fprintf(stderr, "%s: error while formating\n", cow_filename);
exit(1);
}
}
close(cow_fd);
return 0;
......
......@@ -58,19 +58,6 @@ void bdrv_get_geometry(BlockDriverState *bs, int64_t *nb_sectors_ptr);
int bdrv_commit(BlockDriverState *bs);
void bdrv_set_boot_sector(BlockDriverState *bs, const uint8_t *data, int size);
/* user mode linux compatible COW file */
#define COW_MAGIC 0x4f4f4f4d /* MOOO */
#define COW_VERSION 2
struct cow_header_v2 {
uint32_t magic;
uint32_t version;
char backing_file[1024];
int32_t mtime;
uint64_t size;
uint32_t sectorsize;
};
/* vga.c */
#define VGA_RAM_SIZE (4096 * 1024)
......
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