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[Qemu-block] [PATCH 13/18] nbd: add nbd_dirty_bitmap_load
From: |
Vladimir Sementsov-Ogievskiy |
Subject: |
[Qemu-block] [PATCH 13/18] nbd: add nbd_dirty_bitmap_load |
Date: |
Fri, 3 Feb 2017 18:47:52 +0300 |
Realize bdrv_dirty_bitmap_load interface.
Signed-off-by: Vladimir Sementsov-Ogievskiy <address@hidden>
---
block/nbd.c | 32 ++++++++++++++++++++++++++++++++
1 file changed, 32 insertions(+)
diff --git a/block/nbd.c b/block/nbd.c
index 63bc3f04d0..b2b6fd1cf9 100644
--- a/block/nbd.c
+++ b/block/nbd.c
@@ -557,6 +557,35 @@ static void nbd_refresh_filename(BlockDriverState *bs,
QDict *options)
bs->full_open_options = opts;
}
+static BdrvDirtyBitmap *nbd_dirty_bitmap_load(BlockDriverState *bs,
+ const char *name, Error **errp)
+{
+ int64_t offset = 0, end;
+ uint32_t ma = -1;
+ BdrvDirtyBitmap *bitmap =
+ bdrv_create_dirty_bitmap(bs, bdrv_get_default_bitmap_granularity(bs),
+ name, errp);
+ if (bitmap == NULL) {
+ return NULL;
+ }
+
+ end = bdrv_dirty_bitmap_size(bitmap) << BDRV_SECTOR_BITS;
+
+ while (offset < end) {
+ offset = nbd_client_co_load_bitmap_part(bs, offset,
+ MIN(end - offset, ma), bitmap);
+ if (offset < 0) {
+ goto fail;
+ }
+ }
+
+ return bitmap;
+
+fail:
+ bdrv_release_dirty_bitmap(bs, bitmap);
+ return NULL;
+}
+
static BlockDriver bdrv_nbd = {
.format_name = "nbd",
.protocol_name = "nbd",
@@ -574,6 +603,7 @@ static BlockDriver bdrv_nbd = {
.bdrv_detach_aio_context = nbd_detach_aio_context,
.bdrv_attach_aio_context = nbd_attach_aio_context,
.bdrv_refresh_filename = nbd_refresh_filename,
+ .bdrv_dirty_bitmap_load = nbd_dirty_bitmap_load,
};
static BlockDriver bdrv_nbd_tcp = {
@@ -593,6 +623,7 @@ static BlockDriver bdrv_nbd_tcp = {
.bdrv_detach_aio_context = nbd_detach_aio_context,
.bdrv_attach_aio_context = nbd_attach_aio_context,
.bdrv_refresh_filename = nbd_refresh_filename,
+ .bdrv_dirty_bitmap_load = nbd_dirty_bitmap_load,
};
static BlockDriver bdrv_nbd_unix = {
@@ -612,6 +643,7 @@ static BlockDriver bdrv_nbd_unix = {
.bdrv_detach_aio_context = nbd_detach_aio_context,
.bdrv_attach_aio_context = nbd_attach_aio_context,
.bdrv_refresh_filename = nbd_refresh_filename,
+ .bdrv_dirty_bitmap_load = nbd_dirty_bitmap_load,
};
static void bdrv_nbd_init(void)
--
2.11.0