[PATCH v7 03/12] migration/dirtyrate: Add RamblockDirtyInfo to store sampled page info

[Chuan Zheng]

Add RamblockDirtyInfo to store sampled page info of each ramblock.

Signed-off-by: Chuan Zheng <zhengchuan@huawei.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: David Edmondson <david.edmondson@oracle.com>
---
 migration/dirtyrate.h | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/migration/dirtyrate.h b/migration/dirtyrate.h
index 5be9714..479e222 100644
--- a/migration/dirtyrate.h
+++ b/migration/dirtyrate.h
@@ -19,11 +19,29 @@
  */
 #define DIRTYRATE_DEFAULT_SAMPLE_PAGES            512
 
+/*
+ * Record ramblock idstr
+ */
+#define RAMBLOCK_INFO_MAX_LEN                     256
+
 struct DirtyRateConfig {
     uint64_t sample_pages_per_gigabytes; /* sample pages per GB */
     int64_t sample_period_seconds; /* time duration between two sampling */
 };
 
+/*
+ * Store dirtypage info for each ramblock.
+ */
+struct RamblockDirtyInfo {
+    char idstr[RAMBLOCK_INFO_MAX_LEN]; /* idstr for each ramblock */
+    uint8_t *ramblock_addr; /* base address of ramblock we measure */
+    uint64_t ramblock_pages; /* ramblock size in TARGET_PAGE_SIZE */
+    uint64_t *sample_page_vfn; /* relative offset address for sampled page */
+    uint64_t sample_pages_count; /* count of sampled pages */
+    uint64_t sample_dirty_count; /* count of dirty pages we measure */
+    uint32_t *hash_result; /* array of hash result for sampled pages */
+};
+
 void *get_dirtyrate_thread(void *arg);
 #endif
 
-- 
1.8.3.1