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| author | Anthony Liguori | 2010-12-17 16:58:22 +0100 |
|---|---|---|
| committer | Kevin Wolf | 2011-04-13 12:06:41 +0200 |
| commit | 21df65b6444858ddee3a86d8666571bb41695614 (patch) | |
| tree | 142793b8ae8e6fef8b1aa412cf39e2340091fdf9 /block/qed-check.c | |
| parent | docs: Describe zero data clusters in QED specification (diff) | |
| download | qemu-21df65b6444858ddee3a86d8666571bb41695614.tar.gz qemu-21df65b6444858ddee3a86d8666571bb41695614.tar.xz qemu-21df65b6444858ddee3a86d8666571bb41695614.zip | |
qed: Add support for zero clusters
Zero clusters are similar to unallocated clusters except instead of reading
their value from a backing file when one is available, the cluster is always
read as zero.
This implements read support only. At this stage, QED will never write a
zero cluster.
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'block/qed-check.c')
| -rw-r--r-- | block/qed-check.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/block/qed-check.c b/block/qed-check.c index 4600932bf2..ea4ebc8e20 100644 --- a/block/qed-check.c +++ b/block/qed-check.c @@ -72,7 +72,8 @@ static unsigned int qed_check_l2_table(QEDCheck *check, QEDTable *table) for (i = 0; i < s->table_nelems; i++) { uint64_t offset = table->offsets[i]; - if (!offset) { + if (qed_offset_is_unalloc_cluster(offset) || + qed_offset_is_zero_cluster(offset)) { continue; } @@ -111,7 +112,7 @@ static int qed_check_l1_table(QEDCheck *check, QEDTable *table) unsigned int num_invalid_l2; uint64_t offset = table->offsets[i]; - if (!offset) { + if (qed_offset_is_unalloc_cluster(offset)) { continue; } |