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author | Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> | 2017-06-28 15:05:28 +0300 |
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committer | Max Reitz <mreitz@redhat.com> | 2017-07-11 17:44:59 +0200 |
commit | 469c71edc729ada7df63063ce2d7586762f4fda7 (patch) | |
tree | ecba295727ef13b81028b0da184b3fafdbf5e1cb /block/qcow2-bitmap.c | |
parent | 56f364e6d745e46c9f6686df9a5d512d32e182ad (diff) | |
download | qemu-469c71edc729ada7df63063ce2d7586762f4fda7.zip qemu-469c71edc729ada7df63063ce2d7586762f4fda7.tar.gz qemu-469c71edc729ada7df63063ce2d7586762f4fda7.tar.bz2 |
qcow2: add .bdrv_remove_persistent_dirty_bitmap
Realize .bdrv_remove_persistent_dirty_bitmap interface.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Message-id: 20170628120530.31251-29-vsementsov@virtuozzo.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
Diffstat (limited to 'block/qcow2-bitmap.c')
-rw-r--r-- | block/qcow2-bitmap.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/block/qcow2-bitmap.c b/block/qcow2-bitmap.c index a8c7e1d..3e8735a 100644 --- a/block/qcow2-bitmap.c +++ b/block/qcow2-bitmap.c @@ -1237,6 +1237,47 @@ static Qcow2Bitmap *find_bitmap_by_name(Qcow2BitmapList *bm_list, return NULL; } +void qcow2_remove_persistent_dirty_bitmap(BlockDriverState *bs, + const char *name, + Error **errp) +{ + int ret; + BDRVQcow2State *s = bs->opaque; + Qcow2Bitmap *bm; + Qcow2BitmapList *bm_list; + + if (s->nb_bitmaps == 0) { + /* Absence of the bitmap is not an error: see explanation above + * bdrv_remove_persistent_dirty_bitmap() definition. */ + return; + } + + bm_list = bitmap_list_load(bs, s->bitmap_directory_offset, + s->bitmap_directory_size, errp); + if (bm_list == NULL) { + return; + } + + bm = find_bitmap_by_name(bm_list, name); + if (bm == NULL) { + goto fail; + } + + QSIMPLEQ_REMOVE(bm_list, bm, Qcow2Bitmap, entry); + + ret = update_ext_header_and_dir(bs, bm_list); + if (ret < 0) { + error_setg_errno(errp, -ret, "Failed to update bitmap extension"); + goto fail; + } + + free_bitmap_clusters(bs, &bm->table); + +fail: + bitmap_free(bm); + bitmap_list_free(bm_list); +} + void qcow2_store_persistent_dirty_bitmaps(BlockDriverState *bs, Error **errp) { BdrvDirtyBitmap *bitmap; |