diff options
| -rw-r--r-- | qemu-img.c | 45 |
1 files changed, 30 insertions, 15 deletions
diff --git a/qemu-img.c b/qemu-img.c index a5949e6b05..67739439c5 100644 --- a/qemu-img.c +++ b/qemu-img.c @@ -1071,28 +1071,50 @@ static int img_compare(int argc, char **argv) } for (;;) { + int64_t status1, status2; nb_sectors = sectors_to_process(total_sectors, sector_num); if (nb_sectors <= 0) { break; } - allocated1 = bdrv_is_allocated_above(bs1, NULL, sector_num, nb_sectors, - &pnum1); - if (allocated1 < 0) { + status1 = bdrv_get_block_status_above(bs1, NULL, sector_num, + total_sectors1 - sector_num, + &pnum1); + if (status1 < 0) { ret = 3; error_report("Sector allocation test failed for %s", filename1); goto out; } + allocated1 = status1 & BDRV_BLOCK_ALLOCATED; - allocated2 = bdrv_is_allocated_above(bs2, NULL, sector_num, nb_sectors, - &pnum2); - if (allocated2 < 0) { + status2 = bdrv_get_block_status_above(bs2, NULL, sector_num, + total_sectors2 - sector_num, + &pnum2); + if (status2 < 0) { ret = 3; error_report("Sector allocation test failed for %s", filename2); goto out; } - nb_sectors = MIN(pnum1, pnum2); + allocated2 = status2 & BDRV_BLOCK_ALLOCATED; + if (pnum1) { + nb_sectors = MIN(nb_sectors, pnum1); + } + if (pnum2) { + nb_sectors = MIN(nb_sectors, pnum2); + } - if (allocated1 == allocated2) { + if (strict) { + if ((status1 & ~BDRV_BLOCK_OFFSET_MASK) != + (status2 & ~BDRV_BLOCK_OFFSET_MASK)) { + ret = 1; + qprintf(quiet, "Strict mode: Offset %" PRId64 + " block status mismatch!\n", + sectors_to_bytes(sector_num)); + goto out; + } + } + if ((status1 & BDRV_BLOCK_ZERO) && (status2 & BDRV_BLOCK_ZERO)) { + nb_sectors = MIN(pnum1, pnum2); + } else if (allocated1 == allocated2) { if (allocated1) { ret = blk_read(blk1, sector_num, buf1, nb_sectors); if (ret < 0) { @@ -1120,13 +1142,6 @@ static int img_compare(int argc, char **argv) } } } else { - if (strict) { - ret = 1; - qprintf(quiet, "Strict mode: Offset %" PRId64 - " allocation mismatch!\n", - sectors_to_bytes(sector_num)); - goto out; - } if (allocated1) { ret = check_empty_sectors(blk1, sector_num, nb_sectors, |