Merge remote-tracking branch 'remotes/armbru/tags/pull-block-2015-05-29' into staging

Block QAPI, monitor, command line patches

# gpg: Signature made Fri May 29 12:02:32 2015 BST using RSA key ID EB918653
# gpg: Good signature from "Markus Armbruster <armbru@redhat.com>"
# gpg:                 aka "Markus Armbruster <armbru@pond.sub.org>"

* remotes/armbru/tags/pull-block-2015-05-29:
  qapi: add dirty bitmap status

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

block.c

@@ -3116,6 +3116,17 @@ bool bdrv_dirty_bitmap_enabled(BdrvDirtyBitmap *bitmap)
     return !(bitmap->disabled || bitmap->successor);
 }
 
+DirtyBitmapStatus bdrv_dirty_bitmap_status(BdrvDirtyBitmap *bitmap)
+{
+    if (bdrv_dirty_bitmap_frozen(bitmap)) {
+        return DIRTY_BITMAP_STATUS_FROZEN;
+    } else if (!bdrv_dirty_bitmap_enabled(bitmap)) {
+        return DIRTY_BITMAP_STATUS_DISABLED;
+    } else {
+        return DIRTY_BITMAP_STATUS_ACTIVE;
+    }
+}
+
 /**
  * Create a successor bitmap destined to replace this bitmap after an operation.
  * Requires that the bitmap is not frozen and has no successor.
@@ -3256,7 +3267,7 @@ BlockDirtyInfoList *bdrv_query_dirty_bitmaps(BlockDriverState *bs)
         info->granularity = bdrv_dirty_bitmap_granularity(bm);
         info->has_name = !!bm->name;
         info->name = g_strdup(bm->name);
-        info->frozen = bdrv_dirty_bitmap_frozen(bm);
+        info->status = bdrv_dirty_bitmap_status(bm);
         entry->value = info;
         *plist = entry;
         plist = &entry->next;

include/block/block.h

@@ -476,6 +476,7 @@ uint32_t bdrv_get_default_bitmap_granularity(BlockDriverState *bs);
 uint32_t bdrv_dirty_bitmap_granularity(BdrvDirtyBitmap *bitmap);
 bool bdrv_dirty_bitmap_enabled(BdrvDirtyBitmap *bitmap);
 bool bdrv_dirty_bitmap_frozen(BdrvDirtyBitmap *bitmap);
+DirtyBitmapStatus bdrv_dirty_bitmap_status(BdrvDirtyBitmap *bitmap);
 int bdrv_get_dirty(BlockDriverState *bs, BdrvDirtyBitmap *bitmap, int64_t sector);
 void bdrv_set_dirty_bitmap(BdrvDirtyBitmap *bitmap,
                            int64_t cur_sector, int nr_sectors);

qapi/block-core.json

@@ -325,6 +325,25 @@
   'data': { 'start': 'int', 'length': 'int', 'depth': 'int', 'zero': 'bool',
             'data': 'bool', '*offset': 'int' } }
 
+##
+# @DirtyBitmapStatus:
+#
+# An enumeration of possible states that a dirty bitmap can report to the user.
+#
+# @frozen: The bitmap is currently in-use by a backup operation or block job,
+#          and is immutable.
+#
+# @disabled: The bitmap is currently in-use by an internal operation and is
+#            read-only. It can still be deleted.
+#
+# @active: The bitmap is actively monitoring for new writes, and can be cleared,
+#          deleted, or used for backup operations.
+#
+# Since: 2.4
+##
+{ 'enum': 'DirtyBitmapStatus',
+  'data': ['active', 'disabled', 'frozen'] }
+
 ##
 # @BlockDirtyInfo:
 #
@@ -336,13 +355,13 @@
 #
 # @granularity: granularity of the dirty bitmap in bytes (since 1.4)
 #
-# @frozen: whether the dirty bitmap is frozen (Since 2.4)
+# @status: current status of the dirty bitmap (since 2.4)
 #
 # Since: 1.3
 ##
 { 'struct': 'BlockDirtyInfo',
   'data': {'*name': 'str', 'count': 'int', 'granularity': 'uint32',
-           'frozen': 'bool'} }
+           'status': 'DirtyBitmapStatus'} }
 
 ##
 # @BlockInfo: