[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [RFC V3 02/24] qcow2: Add deduplication structures and fiel
From: |
Benoît Canet |
Subject: |
[Qemu-devel] [RFC V3 02/24] qcow2: Add deduplication structures and fields. |
Date: |
Mon, 26 Nov 2012 14:05:01 +0100 |
Signed-off-by: Benoit Canet <address@hidden>
---
block/qcow2.h | 28 +++++++++++++++++++++++++++-
1 file changed, 27 insertions(+), 1 deletion(-)
diff --git a/block/qcow2.h b/block/qcow2.h
index b4eb654..e192001 100644
--- a/block/qcow2.h
+++ b/block/qcow2.h
@@ -58,6 +58,23 @@
#define DEFAULT_CLUSTER_SIZE 65536
+/* deduplication node */
+typedef struct {
+ uint8_t *hash; /* 32 bytes hash of a given cluster */
+ uint64_t offset; /* offset where the cluster is stored (sectors) */
+ uint64_t first_logical_offset;
+} QCowHashNode;
+
+/* Undedupable hashes that must be written later to disk */
+typedef struct QCowHashElement {
+ uint8_t *hash;
+ QTAILQ_ENTRY(QCowHashElement) next;
+} QCowHashElement;
+
+typedef struct UndedupableHashes {
+ QTAILQ_HEAD(, QCowHashElement) undedupable_hashes;
+} UndedupableHashes;
+
typedef struct QCowHeader {
uint32_t magic;
uint32_t version;
@@ -114,8 +131,10 @@ enum {
enum {
QCOW2_INCOMPAT_DIRTY_BITNR = 0,
QCOW2_INCOMPAT_DIRTY = 1 << QCOW2_INCOMPAT_DIRTY_BITNR,
+ QCOW2_INCOMPAT_DEDUP_BITNR = 1,
+ QCOW2_INCOMPAT_DEDUP = 1 << QCOW2_INCOMPAT_DEDUP_BITNR,
- QCOW2_INCOMPAT_MASK = QCOW2_INCOMPAT_DIRTY,
+ QCOW2_INCOMPAT_MASK = QCOW2_INCOMPAT_DIRTY | QCOW2_INCOMPAT_DEDUP,
};
/* Compatible feature bits */
@@ -148,6 +167,7 @@ typedef struct BDRVQcowState {
Qcow2Cache* l2_table_cache;
Qcow2Cache* refcount_block_cache;
+ Qcow2Cache *dedup_cluster_cache;
uint8_t *cluster_cache;
uint8_t *cluster_data;
@@ -160,6 +180,12 @@ typedef struct BDRVQcowState {
int64_t free_cluster_index;
int64_t free_byte_offset;
+ bool has_dedup;
+ uint64_t *dedup_table;
+ uint64_t dedup_table_offset;
+ int32_t dedup_table_size;
+ GTree *dedup_tree_by_hash;
+ GTree *dedup_tree_by_offset;
CoMutex lock;
uint32_t crypt_method; /* current crypt method, 0 if no key yet */
--
1.7.10.4
- [Qemu-devel] [RFC V3 00/24] QCOW2 deduplication, Benoît Canet, 2012/11/26
- [Qemu-devel] [RFC V3 02/24] qcow2: Add deduplication structures and fields.,
Benoît Canet <=
- [Qemu-devel] [RFC V3 01/24] qcow2: Add deduplication to the qcow2 specification., Benoît Canet, 2012/11/26
- [Qemu-devel] [RFC V3 04/24] qcow2: Make update_cluster_refcount public., Benoît Canet, 2012/11/26
- [Qemu-devel] [RFC V3 05/24] qcow2: Create a way to link to l2 tables in dedup., Benoît Canet, 2012/11/26
- [Qemu-devel] [RFC V3 03/24] qcow2: Add qcow2_de dup_read_missing_and_concatenate, Benoît Canet, 2012/11/26
- [Qemu-devel] [RFC V3 06/24] qcow2: Add qcow2_dedup and related functions., Benoît Canet, 2012/11/26
- [Qemu-devel] [RFC V3 09/24] qcow2: Extract qcow2_dedup_grow_table, Benoît Canet, 2012/11/26
- [Qemu-devel] [RFC V3 13/24] qcow2: Add qcow2_dedup_init and qcow2_dedup_close., Benoît Canet, 2012/11/26
- [Qemu-devel] [RFC V3 12/24] qcow2: Extract qcow2_do_table_init., Benoît Canet, 2012/11/26
- [Qemu-devel] [RFC V3 11/24] qcow2: Load and save deduplication table header extension., Benoît Canet, 2012/11/26
- [Qemu-devel] [RFC V3 14/24] qcow2: Extract qcow2_add_feature and qcow2_remove_feature., Benoît Canet, 2012/11/26