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Revert "qemu-img: Check post-truncation size"

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This reverts commit 5279b30392.

We no longer need this check because exact=true forces the block driver
to give the image the exact size requested by the user.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-id: 20190918095144.955-9-mreitz@redhat.com
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Max Reitz
2019-09-18 11:51:44 +02:00
parent e8d04f9237
commit 09c5c6de41
1 changed files with 4 additions and 35 deletions
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39
qemu-img.c
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@@ -3656,7 +3656,7 @@ static int img_resize(int argc, char **argv)
Error *err = NULL;
int c, ret, relative;
const char *filename, *fmt, *size;
int64_t n, total_size, current_size, new_size;
int64_t n, total_size, current_size;
bool quiet = false;
BlockBackend *blk = NULL;
PreallocMode prealloc = PREALLOC_MODE_OFF;
@@ -3837,42 +3837,11 @@ static int img_resize(int argc, char **argv)
* success when the image has not actually been resized.
*/
ret = blk_truncate(blk, total_size, true, prealloc, &err);
if (ret < 0) {
if (!ret) {
qprintf(quiet, "Image resized.\n");
} else {
error_report_err(err);
goto out;
}
new_size = blk_getlength(blk);
if (new_size < 0) {
error_report("Failed to verify truncated image length: %s",
strerror(-new_size));
ret = -1;
goto out;
}
/* Some block drivers implement a truncation method, but only so
* the user can cause qemu to refresh the image's size from disk.
* The idea is that the user resizes the image outside of qemu and
* then invokes block_resize to inform qemu about it.
* (This includes iscsi and file-posix for device files.)
* Of course, that is not the behavior someone invoking
* qemu-img resize would find useful, so we catch that behavior
* here and tell the user. */
if (new_size != total_size && new_size == current_size) {
error_report("Image was not resized; resizing may not be supported "
"for this image");
ret = -1;
goto out;
}
if (new_size != total_size) {
warn_report("Image should have been resized to %" PRIi64
" bytes, but was resized to %" PRIi64 " bytes",
total_size, new_size);
}
qprintf(quiet, "Image resized.\n");
out:
blk_unref(blk);
if (ret) {