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[Qemu-devel] [2.3 PATCH v7 04/10] hbitmap: Add hbitmap_copy
From: |
John Snow |
Subject: |
[Qemu-devel] [2.3 PATCH v7 04/10] hbitmap: Add hbitmap_copy |
Date: |
Tue, 25 Nov 2014 14:46:34 -0500 |
From: Fam Zheng <address@hidden>
This makes a deep copy of an HBitmap.
Signed-off-by: Fam Zheng <address@hidden>
Signed-off-by: John Snow <address@hidden>
---
include/qemu/hbitmap.h | 8 ++++++++
util/hbitmap.c | 16 ++++++++++++++++
2 files changed, 24 insertions(+)
diff --git a/include/qemu/hbitmap.h b/include/qemu/hbitmap.h
index 550d7ce..b645cfc 100644
--- a/include/qemu/hbitmap.h
+++ b/include/qemu/hbitmap.h
@@ -65,6 +65,14 @@ struct HBitmapIter {
HBitmap *hbitmap_alloc(uint64_t size, int granularity);
/**
+ * hbitmap_copy:
+ * @bitmap: The original bitmap to copy.
+ *
+ * Copy a HBitmap.
+ */
+HBitmap *hbitmap_copy(const HBitmap *bitmap);
+
+/**
* hbitmap_empty:
* @hb: HBitmap to operate on.
*
diff --git a/util/hbitmap.c b/util/hbitmap.c
index b3060e6..eddc05b 100644
--- a/util/hbitmap.c
+++ b/util/hbitmap.c
@@ -395,3 +395,19 @@ HBitmap *hbitmap_alloc(uint64_t size, int granularity)
hb->levels[0][0] |= 1UL << (BITS_PER_LONG - 1);
return hb;
}
+
+HBitmap *hbitmap_copy(const HBitmap *bitmap)
+{
+ int i;
+ uint64_t size;
+ HBitmap *hb = g_memdup(bitmap, sizeof(HBitmap));
+
+ size = bitmap->size;
+ for (i = HBITMAP_LEVELS; i >= 0; i--) {
+ size = MAX((size + BITS_PER_LONG - 1) >> BITS_PER_LEVEL, 1);
+ hb->levels[i] = g_memdup(bitmap->levels[i],
+ size * sizeof(unsigned long));
+ }
+
+ return hb;
+}
--
1.9.3
- [Qemu-devel] [2.3 PATCH v7 05/10] block: Add bdrv_copy_dirty_bitmap and bdrv_reset_dirty_bitmap, (continued)
- [Qemu-devel] [2.3 PATCH v7 06/10] qmp: Add block-dirty-bitmap-enable and block-dirty-bitmap-disable, John Snow, 2014/11/25
- [Qemu-devel] [2.3 PATCH v7 10/10] qemu-iotests: Add tests for drive-backup sync=dirty-bitmap, John Snow, 2014/11/25
- [Qemu-devel] [2.3 PATCH v7 07/10] qmp: Add support of "dirty-bitmap" sync mode for drive-backup, John Snow, 2014/11/25
- [Qemu-devel] [2.3 PATCH v7 04/10] hbitmap: Add hbitmap_copy,
John Snow <=
- [Qemu-devel] [2.3 PATCH v7 08/10] qapi: Add transaction support to block-dirty-bitmap-{add, enable, disable}, John Snow, 2014/11/25
- [Qemu-devel] [2.3 PATCH v7 09/10] qmp: Add dirty bitmap 'enabled' field in query-block, John Snow, 2014/11/25
- [Qemu-devel] [2.3 PATCH v7 02/10] qmp: Add block-dirty-bitmap-add and block-dirty-bitmap-remove, John Snow, 2014/11/25