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[RFC PATCH 18/23] qcow2: Add subcluster support to expand_zero_clusters_
From: |
Alberto Garcia |
Subject: |
[RFC PATCH 18/23] qcow2: Add subcluster support to expand_zero_clusters_in_l1() |
Date: |
Tue, 15 Oct 2019 18:23:29 +0300 |
Two changes are needed in order to add subcluster support to this
function: deallocated clusters must have their bitmaps cleared, and
expanded clusters must have all the "subcluster allocated" bits set.
Signed-off-by: Alberto Garcia <address@hidden>
---
block/qcow2-cluster.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/block/qcow2-cluster.c b/block/qcow2-cluster.c
index bf32447d18..dc72f0e595 100644
--- a/block/qcow2-cluster.c
+++ b/block/qcow2-cluster.c
@@ -2033,6 +2033,7 @@ static int expand_zero_clusters_in_l1(BlockDriverState
*bs, uint64_t *l1_table,
/* not backed; therefore we can simply deallocate the
* cluster */
set_l2_entry(s, l2_slice, j, 0);
+ set_l2_bitmap(s, l2_slice, j, 0);
l2_dirty = true;
continue;
}
@@ -2099,6 +2100,7 @@ static int expand_zero_clusters_in_l1(BlockDriverState
*bs, uint64_t *l1_table,
} else {
set_l2_entry(s, l2_slice, j, offset);
}
+ set_l2_bitmap(s, l2_slice, j, QCOW_L2_BITMAP_ALL_ALLOC);
l2_dirty = true;
}
--
2.20.1
- [RFC PATCH 05/23] qcow2: Document the Extended L2 Entries feature, (continued)
- [RFC PATCH 05/23] qcow2: Document the Extended L2 Entries feature, Alberto Garcia, 2019/10/15
- [RFC PATCH 04/23] qcow2: Add get_l2_entry() and set_l2_entry(), Alberto Garcia, 2019/10/15
- [RFC PATCH 08/23] qcow2: Add offset_to_sc_index(), Alberto Garcia, 2019/10/15
- [RFC PATCH 11/23] qcow2: Add qcow2_get_subcluster_type(), Alberto Garcia, 2019/10/15
- [RFC PATCH 15/23] qcow2: Add subcluster support to zero_in_l2_slice(), Alberto Garcia, 2019/10/15
- [RFC PATCH 22/23] qcow2: Restrict qcow2_co_pwrite_zeroes() to full clusters only, Alberto Garcia, 2019/10/15
- [RFC PATCH 07/23] qcow2: Add subcluster-related fields to BDRVQcow2State, Alberto Garcia, 2019/10/15
- [RFC PATCH 20/23] qcow2: Update L2 bitmap in qcow2_alloc_cluster_link_l2(), Alberto Garcia, 2019/10/15
- [RFC PATCH 02/23] qcow2: Split cluster_needs_cow() out of count_cow_clusters(), Alberto Garcia, 2019/10/15
- [RFC PATCH 14/23] qcow2: Add subcluster support to qcow2_get_cluster_offset(), Alberto Garcia, 2019/10/15
- [RFC PATCH 18/23] qcow2: Add subcluster support to expand_zero_clusters_in_l1(),
Alberto Garcia <=
- [RFC PATCH 19/23] qcow2: Fix offset calculation in handle_dependencies(), Alberto Garcia, 2019/10/15
- [RFC PATCH 23/23] qcow2: Add the 'extended_l2' option and the QCOW2_INCOMPAT_EXTL2 bit, Alberto Garcia, 2019/10/15
- [RFC PATCH 13/23] qcow2: Add subcluster support to calculate_l2_meta(), Alberto Garcia, 2019/10/15
- [RFC PATCH 21/23] qcow2: Add subcluster support to handle_alloc_space(), Alberto Garcia, 2019/10/15
- [RFC PATCH 17/23] qcow2: Add subcluster support to check_refcounts_l2(), Alberto Garcia, 2019/10/15
- Re: [RFC PATCH 00/23] Add subcluster allocation to qcow2, Eric Blake, 2019/10/15
- Re: [RFC PATCH 00/23] Add subcluster allocation to qcow2, Vladimir Sementsov-Ogievskiy, 2019/10/23