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| author | Vladimir Sementsov-Ogievskiy | 2017-06-28 14:05:06 +0200 |
|---|---|---|
| committer | Max Reitz | 2017-07-11 17:44:57 +0200 |
| commit | 6bdc8b719a1617ec5ddfb13e78054df22fa12f84 (patch) | |
| tree | 1cca120356705de5416ee6e24498692bc50b4b37 /util | |
| parent | block: fix bdrv_dirty_bitmap_granularity signature (diff) | |
| download | qemu-6bdc8b719a1617ec5ddfb13e78054df22fa12f84.tar.gz qemu-6bdc8b719a1617ec5ddfb13e78054df22fa12f84.tar.xz qemu-6bdc8b719a1617ec5ddfb13e78054df22fa12f84.zip | |
block/dirty-bitmap: add deserialize_ones func
Add bdrv_dirty_bitmap_deserialize_ones() function, which is needed for
qcow2 bitmap loading, to handle unallocated bitmap parts, marked as
all-ones.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Message-id: 20170628120530.31251-7-vsementsov@virtuozzo.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
Diffstat (limited to 'util')
| -rw-r--r-- | util/hbitmap.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/util/hbitmap.c b/util/hbitmap.c index 0b38817505..0c1591a594 100644 --- a/util/hbitmap.c +++ b/util/hbitmap.c @@ -551,6 +551,23 @@ void hbitmap_deserialize_zeroes(HBitmap *hb, uint64_t start, uint64_t count, } } +void hbitmap_deserialize_ones(HBitmap *hb, uint64_t start, uint64_t count, + bool finish) +{ + uint64_t el_count; + unsigned long *first; + + if (!count) { + return; + } + serialization_chunk(hb, start, count, &first, &el_count); + + memset(first, 0xff, el_count * sizeof(unsigned long)); + if (finish) { + hbitmap_deserialize_finish(hb); + } +} + void hbitmap_deserialize_finish(HBitmap *bitmap) { int64_t i, size, prev_size; |