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-rw-r--r--qemu-io.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/qemu-io.c b/qemu-io.c
index b48364f1b3..5882067443 100644
--- a/qemu-io.c
+++ b/qemu-io.c
@@ -1560,7 +1560,7 @@ out:
static int alloc_f(int argc, char **argv)
{
- int64_t offset;
+ int64_t offset, sector_num;
int nb_sectors, remaining;
char s1[64];
int num, sum_alloc;
@@ -1581,12 +1581,18 @@ static int alloc_f(int argc, char **argv)
remaining = nb_sectors;
sum_alloc = 0;
+ sector_num = offset >> 9;
while (remaining) {
- ret = bdrv_is_allocated(bs, offset >> 9, nb_sectors, &num);
+ ret = bdrv_is_allocated(bs, sector_num, remaining, &num);
+ sector_num += num;
remaining -= num;
if (ret) {
sum_alloc += num;
}
+ if (num == 0) {
+ nb_sectors -= remaining;
+ remaining = 0;
+ }
}
cvtstr(offset, s1, sizeof(s1));