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From 4123b978727d577491f84dde507f841c23b6caa4 Mon Sep 17 00:00:00 2001
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From: John Snow <jsnow@redhat.com>
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Date: Wed, 3 Apr 2019 18:18:46 +0200
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Subject: [PATCH 141/163] block/dirty-bitmaps: move comment block
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RH-Author: John Snow <jsnow@redhat.com>
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Message-id: <20190403181857.9693-11-jsnow@redhat.com>
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Patchwork-id: 85415
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O-Subject: [RHEL-7.7 qemu-kvm-rhev PATCH 10/21] block/dirty-bitmaps: move comment block
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Bugzilla: 1677073
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RH-Acked-by: Max Reitz <mreitz@redhat.com>
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RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
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RH-Acked-by: Sergio Lopez Pascual <slp@redhat.com>
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Simply move the big status enum comment block to above the status
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function, and document it as being deprecated. The whole confusing
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block can get deleted in three releases time.
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Signed-off-by: John Snow <jsnow@redhat.com>
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Reviewed-by: Eric Blake <eblake@redhat.com>
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Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
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Message-id: 20190223000614.13894-9-jsnow@redhat.com
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Signed-off-by: John Snow <jsnow@redhat.com>
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(cherry picked from commit 1e6fddcd6f2d3b6b8c7584004763b376334a8457)
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Signed-off-by: John Snow <jsnow@redhat.com>
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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block/dirty-bitmap.c | 36 +++++++++++++++++++-----------------
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1 file changed, 19 insertions(+), 17 deletions(-)
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diff --git a/block/dirty-bitmap.c b/block/dirty-bitmap.c
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index 89c9665..e090237 100644
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--- a/block/dirty-bitmap.c
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+++ b/block/dirty-bitmap.c
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@@ -28,22 +28,6 @@
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#include "block/block_int.h"
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#include "block/blockjob.h"
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-/**
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- * A BdrvDirtyBitmap can be in four possible user-visible states:
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- * (1) Active: successor is NULL, and disabled is false: full r/w mode
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- * (2) Disabled: successor is NULL, and disabled is true: qualified r/w mode,
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- * guest writes are dropped, but monitor writes are possible,
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- * through commands like merge and clear.
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- * (3) Frozen: successor is not NULL.
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- * A frozen bitmap cannot be renamed, deleted, cleared, set,
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- * enabled, merged to, etc. A frozen bitmap can only abdicate()
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- * or reclaim().
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- * In this state, the anonymous successor bitmap may be either
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- * Active and recording writes from the guest (e.g. backup jobs),
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- * but it can be Disabled and not recording writes.
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- * (4) Locked: Whether Active or Disabled, the user cannot modify this bitmap
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- * in any way from the monitor.
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- */
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struct BdrvDirtyBitmap {
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QemuMutex *mutex;
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HBitmap *bitmap; /* Dirty bitmap implementation */
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@@ -205,7 +189,25 @@ bool bdrv_dirty_bitmap_enabled(BdrvDirtyBitmap *bitmap)
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return !bitmap->disabled;
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}
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-/* Called with BQL taken. */
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+/**
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+ * bdrv_dirty_bitmap_status: This API is now deprecated.
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+ * Called with BQL taken.
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+ *
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+ * A BdrvDirtyBitmap can be in four possible user-visible states:
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+ * (1) Active: successor is NULL, and disabled is false: full r/w mode
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+ * (2) Disabled: successor is NULL, and disabled is true: qualified r/w mode,
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+ * guest writes are dropped, but monitor writes are possible,
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+ * through commands like merge and clear.
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+ * (3) Frozen: successor is not NULL.
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+ * A frozen bitmap cannot be renamed, deleted, cleared, set,
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+ * enabled, merged to, etc. A frozen bitmap can only abdicate()
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+ * or reclaim().
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+ * In this state, the anonymous successor bitmap may be either
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+ * Active and recording writes from the guest (e.g. backup jobs),
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+ * or it can be Disabled and not recording writes.
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+ * (4) Locked: Whether Active or Disabled, the user cannot modify this bitmap
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+ * in any way from the monitor.
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+ */
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DirtyBitmapStatus bdrv_dirty_bitmap_status(BdrvDirtyBitmap *bitmap)
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{
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if (bdrv_dirty_bitmap_has_successor(bitmap)) {
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--
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1.8.3.1
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