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[Qemu-devel] [PATCH v6 05/11] qcow2: Reuse refcount table in calculate_r
From: |
Max Reitz |
Subject: |
[Qemu-devel] [PATCH v6 05/11] qcow2: Reuse refcount table in calculate_refcounts() |
Date: |
Mon, 20 Oct 2014 16:35:27 +0200 |
We will later call calculate_refcounts multiple times, so reuse the
refcount table if possible.
Signed-off-by: Max Reitz <address@hidden>
Reviewed-by: BenoƮt Canet <address@hidden>
---
block/qcow2-refcount.c | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/block/qcow2-refcount.c b/block/qcow2-refcount.c
index 42de4ab..55a539f 100644
--- a/block/qcow2-refcount.c
+++ b/block/qcow2-refcount.c
@@ -1623,10 +1623,12 @@ static int calculate_refcounts(BlockDriverState *bs,
BdrvCheckResult *res,
QCowSnapshot *sn;
int ret;
- *refcount_table = g_try_new0(uint16_t, *nb_clusters);
- if (*nb_clusters && *refcount_table == NULL) {
- res->check_errors++;
- return -ENOMEM;
+ if (!*refcount_table) {
+ *refcount_table = g_try_new0(uint16_t, *nb_clusters);
+ if (*nb_clusters && *refcount_table == NULL) {
+ res->check_errors++;
+ return -ENOMEM;
+ }
}
/* header */
@@ -1733,7 +1735,7 @@ int qcow2_check_refcounts(BlockDriverState *bs,
BdrvCheckResult *res,
{
BDRVQcowState *s = bs->opaque;
int64_t size, highest_cluster, nb_clusters;
- uint16_t *refcount_table;
+ uint16_t *refcount_table = NULL;
int ret;
size = bdrv_getlength(bs->file);
--
2.1.2
- [Qemu-devel] [PATCH v6 00/11] qcow2: Fix image repairing, Max Reitz, 2014/10/20
- [Qemu-devel] [PATCH v6 01/11] qcow2: Calculate refcount block entry count, Max Reitz, 2014/10/20
- [Qemu-devel] [PATCH v6 02/11] qcow2: Fix leaks in dirty images, Max Reitz, 2014/10/20
- [Qemu-devel] [PATCH v6 03/11] qcow2: Split qcow2_check_refcounts(), Max Reitz, 2014/10/20
- [Qemu-devel] [PATCH v6 04/11] qcow2: Pull check_refblocks() up, Max Reitz, 2014/10/20
- [Qemu-devel] [PATCH v6 05/11] qcow2: Reuse refcount table in calculate_refcounts(),
Max Reitz <=
- [Qemu-devel] [PATCH v6 07/11] qcow2: Do not perform potentially damaging repairs, Max Reitz, 2014/10/20
- [Qemu-devel] [PATCH v6 06/11] qcow2: Fix refcount blocks beyond image end, Max Reitz, 2014/10/20
- [Qemu-devel] [PATCH v6 09/11] qcow2: Clean up after refcount rebuild, Max Reitz, 2014/10/20