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[Qemu-devel] [PATCH v4 5/9] hbitmap: Add hbitmap_copy
From: |
Fam Zheng |
Subject: |
[Qemu-devel] [PATCH v4 5/9] hbitmap: Add hbitmap_copy |
Date: |
Thu, 27 Mar 2014 17:09:44 +0800 |
This makes a deep copy of an HBitmap.
Signed-off-by: Fam Zheng <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 d936831..d906c06 100644
--- a/util/hbitmap.c
+++ b/util/hbitmap.c
@@ -400,3 +400,19 @@ 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;
+ int64_t size;
+ HBitmap *hb = g_memdup(bitmap, sizeof(struct HBitmap));
+
+ size = bitmap->size;
+ for (i = HBITMAP_LEVELS; i-- > 0; ) {
+ 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;
+}
--
1.9.1
- [Qemu-devel] [PATCH v4 0/9] QMP: Introduce incremental drive-backup with in-memory dirty bitmap, Fam Zheng, 2014/03/27
- [Qemu-devel] [PATCH v4 1/9] qapi: Add optional field "name" to block dirty bitmap, Fam Zheng, 2014/03/27
- [Qemu-devel] [PATCH v4 2/9] qmp: Add dirty-bitmap-add and dirty-bitmap-remove, Fam Zheng, 2014/03/27
- [Qemu-devel] [PATCH v4 4/9] block: Introduce bdrv_dirty_bitmap_granularity(), Fam Zheng, 2014/03/27
- [Qemu-devel] [PATCH v4 5/9] hbitmap: Add hbitmap_copy,
Fam Zheng <=
- [Qemu-devel] [PATCH v4 6/9] block: Add bdrv_copy_dirty_bitmap and bdrv_reset_dirty_bitmap, Fam Zheng, 2014/03/27
- [Qemu-devel] [PATCH v4 7/9] qmp: Add dirty-bitmap-enable and dirty-bitmap-disable, Fam Zheng, 2014/03/27
- [Qemu-devel] [PATCH v4 8/9] qmp: Add support of "dirty-bitmap" sync mode for drive-backup, Fam Zheng, 2014/03/27
- [Qemu-devel] [PATCH v4 9/9] qapi: Add transaction support to dirty-bitmap-{add, disable}, Fam Zheng, 2014/03/27
- [Qemu-devel] [PATCH v4 3/9] block: Handle error of bdrv_getlength in bdrv_create_dirty_bitmap, Fam Zheng, 2014/03/27