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[PATCH v3 14/16] qcow2: Fix v3 snapshot table entry compliancy
From: |
Max Reitz |
Subject: |
[PATCH v3 14/16] qcow2: Fix v3 snapshot table entry compliancy |
Date: |
Fri, 11 Oct 2019 17:28:12 +0200 |
qcow2 v3 images require every snapshot table entry to have at least 16
bytes of extra data. If they do not, let qemu-img check -r all fix it.
Signed-off-by: Max Reitz <address@hidden>
Reviewed-by: Eric Blake <address@hidden>
---
block/qcow2-snapshot.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/block/qcow2-snapshot.c b/block/qcow2-snapshot.c
index dac8a778e4..5ab64da1ec 100644
--- a/block/qcow2-snapshot.c
+++ b/block/qcow2-snapshot.c
@@ -516,6 +516,24 @@ int coroutine_fn
qcow2_check_read_snapshot_table(BlockDriverState *bs,
result->corruptions -= nb_clusters_reduced;
}
+ /*
+ * All of v3 images' snapshot table entries need to have at least
+ * 16 bytes of extra data.
+ */
+ if (s->qcow_version >= 3) {
+ int i;
+ for (i = 0; i < s->nb_snapshots; i++) {
+ if (s->snapshots[i].extra_data_size <
+ sizeof_field(QCowSnapshotExtraData, vm_state_size_large) +
+ sizeof_field(QCowSnapshotExtraData, disk_size))
+ {
+ result->corruptions++;
+ fprintf(stderr, "%s snapshot table entry %i is incomplete\n",
+ fix & BDRV_FIX_ERRORS ? "Repairing" : "ERROR", i);
+ }
+ }
+ }
+
return 0;
}
--
2.21.0
- Re: [PATCH v3 07/16] qcow2: Write v3-compliant snapshot list on upgrade, (continued)
[PATCH v3 08/16] qcow2: Separate qcow2_check_read_snapshot_table(), Max Reitz, 2019/10/11
[PATCH v3 09/16] qcow2: Add qcow2_check_fix_snapshot_table(), Max Reitz, 2019/10/11
[PATCH v3 10/16] qcow2: Fix broken snapshot table entries, Max Reitz, 2019/10/11
[PATCH v3 11/16] qcow2: Keep track of the snapshot table length, Max Reitz, 2019/10/11
[PATCH v3 12/16] qcow2: Fix overly long snapshot tables, Max Reitz, 2019/10/11
[PATCH v3 13/16] qcow2: Repair snapshot table with too many entries, Max Reitz, 2019/10/11
[PATCH v3 14/16] qcow2: Fix v3 snapshot table entry compliancy,
Max Reitz <=
[PATCH v3 15/16] iotests: Add peek_file* functions, Max Reitz, 2019/10/11
[PATCH v3 16/16] iotests: Test qcow2's snapshot table handling, Max Reitz, 2019/10/11
Re: [PATCH v3 00/16] qcow2: Let check -r all repair some snapshot bits, Max Reitz, 2019/10/28