@@ -56,6 +56,7 @@ struct BdrvDirtyBitmap {
int64_t size;
int64_t granularity;
char *name;
+ bool enabled;
QLIST_ENTRY(BdrvDirtyBitmap) list;
};
@@ -5396,6 +5397,7 @@ BdrvDirtyBitmap *bdrv_create_dirty_bitmap(BlockDriverState *bs,
bitmap->granularity = granularity;
bitmap->bitmap = hbitmap_alloc(bitmap->size, ffs(sector_granularity) - 1);
bitmap->name = g_strdup(name);
+ bitmap->enabled = true;
QLIST_INSERT_HEAD(&bs->dirty_bitmaps, bitmap, list);
return bitmap;
}
@@ -5414,6 +5416,16 @@ void bdrv_release_dirty_bitmap(BlockDriverState *bs, BdrvDirtyBitmap *bitmap)
}
}
+void bdrv_disable_dirty_bitmap(BdrvDirtyBitmap *bitmap)
+{
+ bitmap->enabled = false;
+}
+
+void bdrv_enable_dirty_bitmap(BdrvDirtyBitmap *bitmap)
+{
+ bitmap->enabled = true;
+}
+
BlockDirtyInfoList *bdrv_query_dirty_bitmaps(BlockDriverState *bs)
{
BdrvDirtyBitmap *bm;
@@ -5482,6 +5494,9 @@ void bdrv_set_dirty(BlockDriverState *bs, int64_t cur_sector,
{
BdrvDirtyBitmap *bitmap;
QLIST_FOREACH(bitmap, &bs->dirty_bitmaps, list) {
+ if (!bitmap->enabled) {
+ continue;
+ }
hbitmap_set(bitmap->bitmap, cur_sector, nr_sectors);
}
}
@@ -1173,6 +1173,41 @@ out_aio_context:
return NULL;
}
+/**
+ * Return a dirty bitmap (if present), after validating
+ * the device and bitmap names. Returns NULL on error,
+ * including when the device and/or bitmap is not found.
+ */
+static BdrvDirtyBitmap *block_dirty_bitmap_lookup(const char *device,
+ const char *name,
+ Error **errp)
+{
+ BlockDriverState *bs;
+ BdrvDirtyBitmap *bitmap;
+
+ if (!device) {
+ error_setg(errp, "Device cannot be NULL");
+ return NULL;
+ }
+ if (!name) {
+ error_setg(errp, "Bitmap name cannot be NULL");
+ return NULL;
+ }
+
+ bs = bdrv_lookup_bs(device, NULL, errp);
+ if (!bs) {
+ return NULL;
+ }
+
+ bitmap = bdrv_find_dirty_bitmap(bs, name);
+ if (!bitmap) {
+ error_setg(errp, "Dirty bitmap not found: %s", name);
+ return NULL;
+ }
+
+ return bitmap;
+}
+
/* New and old BlockDriverState structs for atomic group operations */
typedef struct BlkTransactionState BlkTransactionState;
@@ -1948,6 +1983,32 @@ void qmp_block_dirty_bitmap_remove(const char *device, const char *name,
bdrv_release_dirty_bitmap(bs, bitmap);
}
+void qmp_block_dirty_bitmap_enable(const char *device, const char *name,
+ Error **errp)
+{
+ BdrvDirtyBitmap *bitmap;
+
+ bitmap = block_dirty_bitmap_lookup(device, name, errp);
+ if (!bitmap) {
+ return;
+ }
+
+ bdrv_enable_dirty_bitmap(bitmap);
+}
+
+void qmp_block_dirty_bitmap_disable(const char *device, const char *name,
+ Error **errp)
+{
+ BdrvDirtyBitmap *bitmap;
+
+ bitmap = block_dirty_bitmap_lookup(device, name, errp);
+ if (!bitmap) {
+ return;
+ }
+
+ bdrv_disable_dirty_bitmap(bitmap);
+}
+
int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data)
{
const char *id = qdict_get_str(qdict, "id");
@@ -442,6 +442,8 @@ BdrvDirtyBitmap *bdrv_copy_dirty_bitmap(BlockDriverState *bs,
const BdrvDirtyBitmap *bitmap,
const char *name);
void bdrv_release_dirty_bitmap(BlockDriverState *bs, BdrvDirtyBitmap *bitmap);
+void bdrv_disable_dirty_bitmap(BdrvDirtyBitmap *bitmap);
+void bdrv_enable_dirty_bitmap(BdrvDirtyBitmap *bitmap);
BlockDirtyInfoList *bdrv_query_dirty_bitmaps(BlockDriverState *bs);
uint64_t bdrv_dbm_calc_def_granularity(BlockDriverState *bs);
int64_t bdrv_dirty_bitmap_granularity(BlockDriverState *bs,
@@ -949,6 +949,34 @@
'data': 'BlockDirtyBitmap' }
##
+# @block-dirty-bitmap-enable
+#
+# Enable a dirty bitmap on the device
+#
+# Returns: nothing on success
+# If @device is not a valid block device, DeviceNotFound
+# If @name is not found, GenericError with an explaining message
+#
+# Since 2.3
+##
+{'command': 'block-dirty-bitmap-enable',
+ 'data': 'BlockDirtyBitmap' }
+
+##
+# @block-dirty-bitmap-disable
+#
+# Disable a dirty bitmap on the device
+#
+# Returns: nothing on success
+# If @device is not a valid block device, DeviceNotFound
+# If @name is not found, GenericError with an explaining message
+#
+# Since 2.3
+##
+{'command': 'block-dirty-bitmap-disable',
+ 'data': 'BlockDirtyBitmap' }
+
+##
# @block_set_io_throttle:
#
# Change I/O throttle limits for a block drive.
@@ -1211,6 +1211,16 @@ EQMP
.args_type = "device:B,name:s",
.mhandler.cmd_new = qmp_marshal_input_block_dirty_bitmap_remove,
},
+ {
+ .name = "block-dirty-bitmap-enable",
+ .args_type = "device:B,name:s",
+ .mhandler.cmd_new = qmp_marshal_input_block_dirty_bitmap_enable,
+ },
+ {
+ .name = "block-dirty-bitmap-disable",
+ .args_type = "device:B,name:s",
+ .mhandler.cmd_new = qmp_marshal_input_block_dirty_bitmap_disable,
+ },
SQMP