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qemu-img: Use blk_new_open() in img_rebase()

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Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 1423162705-32065-9-git-send-email-mreitz@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Max Reitz 2015-02-05 13:58:17 -05:00 committed by Stefan Hajnoczi
parent 5bd313266b
commit 644483d97e
1 changed files with 23 additions and 26 deletions
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49
qemu-img.c
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@ -2435,7 +2435,6 @@ static int img_rebase(int argc, char **argv)
{
BlockBackend *blk = NULL, *blk_old_backing = NULL, *blk_new_backing = NULL;
BlockDriverState *bs = NULL, *bs_old_backing = NULL, *bs_new_backing = NULL;
BlockDriver *old_backing_drv, *new_backing_drv;
char *filename;
const char *fmt, *cache, *src_cache, *out_basefmt, *out_baseimg;
int c, flags, src_flags, ret;
@ -2529,22 +2528,8 @@ static int img_rebase(int argc, char **argv)
}
bs = blk_bs(blk);
/* Find the right drivers for the backing files */
old_backing_drv = NULL;
new_backing_drv = NULL;
if (!unsafe && bs->backing_format[0] != '\0') {
old_backing_drv = bdrv_find_format(bs->backing_format);
if (old_backing_drv == NULL) {
error_report("Invalid format name: '%s'", bs->backing_format);
ret = -1;
goto out;
}
}
if (out_basefmt != NULL) {
new_backing_drv = bdrv_find_format(out_basefmt);
if (new_backing_drv == NULL) {
if (bdrv_find_format(out_basefmt) == NULL) {
error_report("Invalid format name: '%s'", out_basefmt);
ret = -1;
goto out;
@ -2554,29 +2539,41 @@ static int img_rebase(int argc, char **argv)
/* For safe rebasing we need to compare old and new backing file */
if (!unsafe) {
char backing_name[PATH_MAX];
QDict *options = NULL;
if (bs->backing_format[0] != '\0') {
options = qdict_new();
qdict_put(options, "driver", qstring_from_str(bs->backing_format));
}
blk_old_backing = blk_new_with_bs("old_backing", &error_abort);
bs_old_backing = blk_bs(blk_old_backing);
bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name));
ret = bdrv_open(&bs_old_backing, backing_name, NULL, NULL, src_flags,
old_backing_drv, &local_err);
if (ret) {
blk_old_backing = blk_new_open("old_backing", backing_name, NULL,
options, src_flags, &local_err);
if (!blk_old_backing) {
error_report("Could not open old backing file '%s': %s",
backing_name, error_get_pretty(local_err));
error_free(local_err);
goto out;
}
bs_old_backing = blk_bs(blk_old_backing);
if (out_baseimg[0]) {
blk_new_backing = blk_new_with_bs("new_backing", &error_abort);
bs_new_backing = blk_bs(blk_new_backing);
ret = bdrv_open(&bs_new_backing, out_baseimg, NULL, NULL, src_flags,
new_backing_drv, &local_err);
if (ret) {
if (out_basefmt) {
options = qdict_new();
qdict_put(options, "driver", qstring_from_str(out_basefmt));
} else {
options = NULL;
}
blk_new_backing = blk_new_open("new_backing", out_baseimg, NULL,
options, src_flags, &local_err);
if (!blk_new_backing) {
error_report("Could not open new backing file '%s': %s",
out_baseimg, error_get_pretty(local_err));
error_free(local_err);
goto out;
}
bs_new_backing = blk_bs(blk_new_backing);
}
}