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Convert qemu-img create to new bdrv_create

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This patch changes qemu-img to actually use the new bdrv_create interface. It
translates the old-style qemu-img options which have been bdrv_create2
parameters or flags so far to option structures. As the generic approach, it
introduces an -o option which accepts any parameter the driver knows.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Kevin Wolf 2009-05-18 16:42:11 +02:00 committed by Anthony Liguori
parent 0e7e1989f7
commit 9ea2ea7146
1 changed files with 88 additions and 47 deletions
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135
qemu-img.c
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@ -22,6 +22,7 @@
* THE SOFTWARE.
*/
#include "qemu-common.h"
#include "qemu-option.h"
#include "osdep.h"
#include "block_int.h"
#include <stdio.h>
@ -221,14 +222,13 @@ static int img_create(int argc, char **argv)
const char *base_fmt = NULL;
const char *filename;
const char *base_filename = NULL;
uint64_t size;
double sizef;
const char *p;
BlockDriver *drv;
QEMUOptionParameter *param = NULL;
char *options = NULL;
flags = 0;
for(;;) {
c = getopt(argc, argv, "F:b:f:he6");
c = getopt(argc, argv, "F:b:f:he6o:");
if (c == -1)
break;
switch(c) {
@ -250,59 +250,100 @@ static int img_create(int argc, char **argv)
case '6':
flags |= BLOCK_FLAG_COMPAT6;
break;
case 'o':
options = optarg;
break;
}
}
if (optind >= argc)
help();
filename = argv[optind++];
size = 0;
if (base_filename) {
BlockDriverState *bs;
BlockDriver *base_drv = NULL;
if (base_fmt) {
base_drv = bdrv_find_format(base_fmt);
if (base_drv == NULL)
error("Unknown basefile format '%s'", base_fmt);
}
bs = bdrv_new_open(base_filename, base_fmt);
bdrv_get_geometry(bs, &size);
size *= 512;
bdrv_delete(bs);
} else {
if (optind >= argc)
help();
p = argv[optind];
sizef = strtod(p, (char **)&p);
if (*p == 'M') {
size = (uint64_t)(sizef * 1024 * 1024);
} else if (*p == 'G') {
size = (uint64_t)(sizef * 1024 * 1024 * 1024);
} else if (*p == 'k' || *p == 'K' || *p == '\0') {
size = (uint64_t)(sizef * 1024);
} else {
help();
}
}
/* Find driver and parse its options */
drv = bdrv_find_format(fmt);
if (!drv)
error("Unknown file format '%s'", fmt);
printf("Formatting '%s', fmt=%s",
filename, fmt);
if (flags & BLOCK_FLAG_ENCRYPT)
printf(", encrypted");
if (flags & BLOCK_FLAG_COMPAT6)
printf(", compatibility level=6");
if (base_filename) {
printf(", backing_file=%s",
base_filename);
if (base_fmt)
printf(", backing_fmt=%s",
base_fmt);
if (options) {
param = parse_option_parameters(options, drv->create_options, param);
if (param == NULL) {
error("Invalid options for file format '%s'.", fmt);
}
} else {
param = parse_option_parameters("", drv->create_options, param);
}
printf(", size=%" PRIu64 " kB\n", size / 1024);
ret = bdrv_create2(drv, filename, size / 512, base_filename, base_fmt, flags);
/* Add size to parameters */
if (optind < argc) {
set_option_parameter(param, BLOCK_OPT_SIZE, argv[optind++]);
}
/* Add old-style options to parameters */
if (flags & BLOCK_FLAG_ENCRYPT) {
if (set_option_parameter(param, BLOCK_OPT_ENCRYPT, "on")) {
error("Encryption not supported for file format '%s'", fmt);
}
}
if (flags & BLOCK_FLAG_COMPAT6) {
if (set_option_parameter(param, BLOCK_OPT_COMPAT6, "on")) {
error("VMDK version 6 not supported for file format '%s'", fmt);
}
}
if (base_filename) {
if (set_option_parameter(param, BLOCK_OPT_BACKING_FILE, base_filename)) {
error("Backing file not supported for file format '%s'", fmt);
}
}
if (base_fmt) {
if (set_option_parameter(param, BLOCK_OPT_BACKING_FMT, base_fmt)) {
error("Backing file format not supported for file format '%s'", fmt);
}
}
// The size for the image must always be specified, with one exception:
// If we are using a backing file, we can obtain the size from there
if (get_option_parameter(param, BLOCK_OPT_SIZE)->value.n == 0) {
QEMUOptionParameter *backing_file =
get_option_parameter(param, BLOCK_OPT_BACKING_FILE);
QEMUOptionParameter *backing_fmt =
get_option_parameter(param, BLOCK_OPT_BACKING_FMT);
if (backing_file && backing_file->value.s) {
BlockDriverState *bs;
uint64_t size;
const char *fmt = NULL;
char buf[32];
if (backing_fmt && backing_fmt->value.s) {
if (bdrv_find_format(backing_fmt->value.s)) {
fmt = backing_fmt->value.s;
} else {
error("Unknown backing file format '%s'",
backing_fmt->value.s);
}
}
bs = bdrv_new_open(backing_file->value.s, fmt);
bdrv_get_geometry(bs, &size);
size *= 512;
bdrv_delete(bs);
snprintf(buf, sizeof(buf), "%" PRId64, size);
set_option_parameter(param, BLOCK_OPT_SIZE, buf);
} else {
error("Image creation needs a size parameter");
}
}
printf("Formatting '%s', fmt=%s ", filename, fmt);
print_option_parameters(param);
puts("");
ret = bdrv_create(drv, filename, param);
free_option_parameters(param);
if (ret < 0) {
if (ret == -ENOTSUP) {
error("Formatting or formatting option not supported for file format '%s'", fmt);