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qcow2-refcount: check_refblocks(): add separate message for reserved 

Split checking for reserved bits out of aligned offset check.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Tested-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Reviewed-by: Hanna Reitz <hreitz@redhat.com>
Message-Id: <20210914122454.141075-11-vsementsov@virtuozzo.com>
Signed-off-by: Hanna Reitz <hreitz@redhat.com>
This commit is contained in:
Vladimir Sementsov-Ogievskiy 2021-09-14 15:24:54 +03:00 committed by Hanna Reitz
parent 98bc07d6cd
commit 8fba395151
2 changed files with 10 additions and 1 deletions
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10
block/qcow2-refcount.c
View File

@ -2089,9 +2089,17 @@ static int check_refblocks(BlockDriverState *bs, BdrvCheckResult *res,
for(i = 0; i < s->refcount_table_size; i++) {
uint64_t offset, cluster;
offset = s->refcount_table[i];
offset = s->refcount_table[i] & REFT_OFFSET_MASK;
cluster = offset >> s->cluster_bits;
if (s->refcount_table[i] & REFT_RESERVED_MASK) {
fprintf(stderr, "ERROR refcount table entry %" PRId64 " has "
"reserved bits set\n", i);
res->corruptions++;
*rebuild = true;
continue;
}
/* Refcount blocks are cluster aligned */
if (offset_into_cluster(s, offset)) {
fprintf(stderr, "ERROR refcount block %" PRId64 " is not "

1
block/qcow2.h
View File

@ -591,6 +591,7 @@ typedef enum QCow2MetadataOverlap {
#define L2E_STD_RESERVED_MASK 0x3f000000000001feULL
#define REFT_OFFSET_MASK 0xfffffffffffffe00ULL
#define REFT_RESERVED_MASK 0x1ffULL
#define INV_OFFSET (-1ULL)