From: Zheng Chuan <zhengch...@huawei.com>
Compare hash results for recorded ramblock.
Signed-off-by: Zheng Chuan <zhengch...@huawei.com>
Signed-off-by: YanYing Zhang <ann.zhuangyany...@huawei.com>
---
migration/dirtyrate.c | 77 +++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 77 insertions(+)
diff --git a/migration/dirtyrate.c b/migration/dirtyrate.c
index 45cfc91..7badc53 100644
--- a/migration/dirtyrate.c
+++ b/migration/dirtyrate.c
@@ -202,6 +202,83 @@ static int record_block_hash_info(struct dirtyrate_config
config,
return 0;
}
+static int cal_block_dirty_rate(struct block_dirty_info *info)
+{
+ uint8_t *md = NULL;
+ size_t hash_len;
+ int i;
+ int ret = 0;
+
+ hash_len = qcrypto_hash_digest_len(QCRYPTO_HASH_ALG_MD5);
+ md = g_new0(uint8_t, hash_len);
+
+ for (i = 0; i < info->sample_pages_count; i++) {
+ ret = get_block_vfn_hash(info, info->sample_page_vfn[i], &md,
&hash_len);
+ if (ret < 0) {
+ goto out;
+ }
+
+ if (memcmp(md, info->hash_result + i * hash_len, hash_len) != 0) {
+ info->sample_dirty_count++;
+ }
+ }
+
+out:
+ g_free(md);
+ return ret;
+}
+
+static bool find_block_matched(RAMBlock *block, struct block_dirty_info *infos,
+ int count, struct block_dirty_info **matched)
+{
+ int i;
+
+ for (i = 0; i < count; i++) {
+ if (!strcmp(infos[i].idstr, qemu_ram_get_idstr(block))) {
+ break;
+ }
+ }
+
+ if (i == count) {
+ return false;
+ }
+
+ if (infos[i].block_addr != qemu_ram_get_host_addr(block) ||
+ infos[i].block_pages !=
+ (qemu_ram_get_used_length(block) >> DIRTYRATE_PAGE_SIZE_SHIFT)) {
+ return false;
+ }
+
+ *matched = &infos[i];
+ return true;
+}
+
+static int compare_block_hash_info(struct block_dirty_info *info, int
block_index)
+{
+ struct block_dirty_info *block_dinfo = NULL;
+ RAMBlock *block = NULL;
+
+ RAMBLOCK_FOREACH_MIGRATABLE(block) {
+ if (ram_block_skip(block) < 0) {
+ continue;
+ }
+ block_dinfo = NULL;
+ if (!find_block_matched(block, info, block_index + 1, &block_dinfo)) {
+ continue;
+ }
+ if (cal_block_dirty_rate(block_dinfo) < 0) {
+ return -1;
+ }
+ update_dirtyrate_stat(block_dinfo);
+ }
+ if (!dirty_stat.total_sample_count) {
+ return -1;
+ }
+
+ return 0;
+}
+
+
static void calculate_dirtyrate(struct dirtyrate_config config, int64_t time)
{
/* todo */
--
1.8.3.1
