diff options
| author | Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> | 2017-06-28 15:05:20 +0300 |
|---|---|---|
| committer | Max Reitz <mreitz@redhat.com> | 2017-07-11 17:44:58 +0200 |
| commit | 169b87935966791a860f59a2b17c4e0c7b953779 (patch) | |
| tree | 2c76d00277ffe3d6b651737e7113b9530f117a9f | |
| parent | 5f72826e7fc62167cf3a37383d1c1151bc9971fe (diff) | |
qcow2: store bitmaps on reopening image as read-only
Store bitmaps and mark them read-only on reopening image as read-only.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 20170628120530.31251-21-vsementsov@virtuozzo.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
| -rw-r--r-- | block/qcow2-bitmap.c | 22 | ||||
| -rw-r--r-- | block/qcow2.c | 5 | ||||
| -rw-r--r-- | block/qcow2.h | 1 |
3 files changed, 28 insertions, 0 deletions
diff --git a/block/qcow2-bitmap.c b/block/qcow2-bitmap.c index 81c49aecdb..f82478c02a 100644 --- a/block/qcow2-bitmap.c +++ b/block/qcow2-bitmap.c @@ -1366,3 +1366,25 @@ fail: bitmap_list_free(bm_list); } + +int qcow2_reopen_bitmaps_ro(BlockDriverState *bs, Error **errp) +{ + BdrvDirtyBitmap *bitmap; + Error *local_err = NULL; + + qcow2_store_persistent_dirty_bitmaps(bs, &local_err); + if (local_err != NULL) { + error_propagate(errp, local_err); + return -EINVAL; + } + + for (bitmap = bdrv_dirty_bitmap_next(bs, NULL); bitmap != NULL; + bitmap = bdrv_dirty_bitmap_next(bs, bitmap)) + { + if (bdrv_dirty_bitmap_get_persistance(bitmap)) { + bdrv_dirty_bitmap_set_readonly(bitmap, true); + } + } + + return 0; +} diff --git a/block/qcow2.c b/block/qcow2.c index 790b5b188f..1a31f1d360 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -1555,6 +1555,11 @@ static int qcow2_reopen_prepare(BDRVReopenState *state, /* We need to write out any unwritten data if we reopen read-only. */ if ((state->flags & BDRV_O_RDWR) == 0) { + ret = qcow2_reopen_bitmaps_ro(state->bs, errp); + if (ret < 0) { + goto fail; + } + ret = bdrv_flush(state->bs); if (ret < 0) { goto fail; diff --git a/block/qcow2.h b/block/qcow2.h index 308cefd0a6..1f80b5d8d4 100644 --- a/block/qcow2.h +++ b/block/qcow2.h @@ -648,5 +648,6 @@ int qcow2_check_bitmaps_refcounts(BlockDriverState *bs, BdrvCheckResult *res, bool qcow2_load_autoloading_dirty_bitmaps(BlockDriverState *bs, Error **errp); int qcow2_reopen_bitmaps_rw(BlockDriverState *bs, Error **errp); void qcow2_store_persistent_dirty_bitmaps(BlockDriverState *bs, Error **errp); +int qcow2_reopen_bitmaps_ro(BlockDriverState *bs, Error **errp); #endif |