From: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
To: qemu-devel@nongnu.org
Cc: kwolf@redhat.com, vsementsov@virtuozzo.com,
Vladimir Sementsov-Ogievskiy <vsementsov@parallels.com>,
stefanha@redhat.com, pbonzini@redhat.com, den@openvz.org,
jsnow@redhat.com
Subject: [Qemu-devel] [PATCH 6/8] qcow2: add autoclear bit for dirty bitmaps
Date: Mon, 8 Jun 2015 18:21:24 +0300 [thread overview]
Message-ID: <1433776886-27239-7-git-send-email-vsementsov@virtuozzo.com> (raw)
In-Reply-To: <1433776886-27239-1-git-send-email-vsementsov@virtuozzo.com>
From: Vladimir Sementsov-Ogievskiy <vsementsov@parallels.com>
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
---
block/qcow2-dirty-bitmap.c | 5 +++++
block/qcow2.c | 13 +++++++++++--
block/qcow2.h | 9 +++++++++
3 files changed, 25 insertions(+), 2 deletions(-)
diff --git a/block/qcow2-dirty-bitmap.c b/block/qcow2-dirty-bitmap.c
index db83112..686a121 100644
--- a/block/qcow2-dirty-bitmap.c
+++ b/block/qcow2-dirty-bitmap.c
@@ -188,6 +188,11 @@ static int qcow2_write_dirty_bitmaps(BlockDriverState *bs)
s->dirty_bitmaps_offset = dirty_bitmaps_offset;
s->dirty_bitmaps_size = dirty_bitmaps_size;
+ if (s->nb_dirty_bitmaps > 0) {
+ s->autoclear_features |= QCOW2_AUTOCLEAR_DIRTY_BITMAPS;
+ } else {
+ s->autoclear_features &= ~QCOW2_AUTOCLEAR_DIRTY_BITMAPS;
+ }
ret = qcow2_update_header(bs);
if (ret < 0) {
fprintf(stderr, "Could not update qcow2 header\n");
diff --git a/block/qcow2.c b/block/qcow2.c
index 406e55d..f85a55a 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -182,6 +182,14 @@ static int qcow2_read_extensions(BlockDriverState *bs, uint64_t start_offset,
return ret;
}
+ if (!(s->autoclear_features & QCOW2_AUTOCLEAR_DIRTY_BITMAPS) &&
+ s->nb_dirty_bitmaps > 0) {
+ ret = qcow2_delete_all_dirty_bitmaps(bs, errp);
+ if (ret < 0) {
+ return ret;
+ }
+ }
+
#ifdef DEBUG_EXT
printf("Qcow2: Got dirty bitmaps extension:"
" offset=%" PRIu64 " nb_bitmaps=%" PRIu32 "\n",
@@ -928,8 +936,9 @@ static int qcow2_open(BlockDriverState *bs, QDict *options, int flags,
}
/* Clear unknown autoclear feature bits */
- if (!bs->read_only && !(flags & BDRV_O_INCOMING) && s->autoclear_features) {
- s->autoclear_features = 0;
+ if (!bs->read_only && !(flags & BDRV_O_INCOMING) &&
+ (s->autoclear_features & ~QCOW2_AUTOCLEAR_MASK)) {
+ s->autoclear_features |= QCOW2_AUTOCLEAR_MASK;
ret = qcow2_update_header(bs);
if (ret < 0) {
error_setg_errno(errp, -ret, "Could not update qcow2 header");
diff --git a/block/qcow2.h b/block/qcow2.h
index b5e576c..14bd6f9 100644
--- a/block/qcow2.h
+++ b/block/qcow2.h
@@ -215,6 +215,15 @@ enum {
QCOW2_COMPAT_FEAT_MASK = QCOW2_COMPAT_LAZY_REFCOUNTS,
};
+/* Autoclear feature bits */
+enum {
+ QCOW2_AUTOCLEAR_DIRTY_BITMAPS_BITNR = 0,
+ QCOW2_AUTOCLEAR_DIRTY_BITMAPS =
+ 1 << QCOW2_AUTOCLEAR_DIRTY_BITMAPS_BITNR,
+
+ QCOW2_AUTOCLEAR_MASK = QCOW2_AUTOCLEAR_DIRTY_BITMAPS,
+};
+
enum qcow2_discard_type {
QCOW2_DISCARD_NEVER = 0,
QCOW2_DISCARD_ALWAYS,
--
1.9.1
next prev parent reply other threads:[~2015-06-08 16:03 UTC|newest]
Thread overview: 76+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-08 15:21 [Qemu-devel] [PATCH v2 RFC 0/8] block: persistent dirty bitmaps Vladimir Sementsov-Ogievskiy
2015-06-08 15:21 ` [Qemu-devel] [PATCH 1/8] spec: add qcow2-dirty-bitmaps specification Vladimir Sementsov-Ogievskiy
2015-06-09 16:01 ` John Snow
2015-06-09 17:03 ` Stefan Hajnoczi
2015-06-10 8:19 ` Vladimir Sementsov-Ogievskiy
2015-06-10 8:49 ` Vladimir Sementsov-Ogievskiy
2015-06-10 13:00 ` Eric Blake
2015-06-11 10:16 ` Vladimir Sementsov-Ogievskiy
2015-06-10 13:24 ` Stefan Hajnoczi
2015-06-11 10:19 ` Vladimir Sementsov-Ogievskiy
2015-06-11 13:03 ` Stefan Hajnoczi
2015-06-11 16:21 ` John Snow
2015-06-12 10:28 ` Stefan Hajnoczi
2015-06-12 15:19 ` John Snow
2015-06-10 15:34 ` Kevin Wolf
2015-06-11 10:25 ` Vladimir Sementsov-Ogievskiy
2015-06-11 16:30 ` John Snow
2015-06-12 8:33 ` Kevin Wolf
2015-08-24 10:46 ` Vladimir Sementsov-Ogievskiy
2015-08-24 13:30 ` Vladimir Sementsov-Ogievskiy
2015-08-24 14:08 ` Vladimir Sementsov-Ogievskiy
2015-08-24 14:04 ` Vladimir Sementsov-Ogievskiy
2015-08-31 22:21 ` Eric Blake
2015-08-31 22:24 ` John Snow
2015-06-08 15:21 ` [Qemu-devel] [PATCH 2/8] qcow2: add dirty-bitmaps feature Vladimir Sementsov-Ogievskiy
2015-06-09 16:52 ` Stefan Hajnoczi
2015-06-10 14:30 ` Stefan Hajnoczi
2015-06-12 19:02 ` John Snow
2015-06-15 14:42 ` Stefan Hajnoczi
2015-06-23 17:57 ` John Snow
2015-06-24 9:39 ` Stefan Hajnoczi
2015-08-14 17:14 ` Vladimir Sementsov-Ogievskiy
2015-08-26 9:09 ` Stefan Hajnoczi
2015-06-11 23:04 ` John Snow
2015-06-15 14:05 ` Vladimir Sementsov-Ogievskiy
2015-06-15 16:53 ` John Snow
2015-06-12 21:55 ` John Snow
2015-08-26 13:15 ` Vladimir Sementsov-Ogievskiy
2015-08-26 14:14 ` Vladimir Sementsov-Ogievskiy
2015-08-27 12:43 ` Vladimir Sementsov-Ogievskiy
2015-06-08 15:21 ` [Qemu-devel] [PATCH 3/8] block: store persistent dirty bitmaps Vladimir Sementsov-Ogievskiy
2015-06-08 15:21 ` [Qemu-devel] [PATCH 4/8] block: add bdrv_load_dirty_bitmap Vladimir Sementsov-Ogievskiy
2015-06-09 16:01 ` Stefan Hajnoczi
2015-06-10 22:33 ` John Snow
2015-06-11 10:41 ` Vladimir Sementsov-Ogievskiy
2015-06-08 15:21 ` [Qemu-devel] [PATCH 5/8] qcow2: add qcow2_dirty_bitmap_delete_all Vladimir Sementsov-Ogievskiy
2015-06-08 15:21 ` Vladimir Sementsov-Ogievskiy [this message]
2015-06-09 15:49 ` [Qemu-devel] [PATCH 6/8] qcow2: add autoclear bit for dirty bitmaps Stefan Hajnoczi
2015-06-09 15:50 ` Stefan Hajnoczi
2015-08-27 7:45 ` Vladimir Sementsov-Ogievskiy
2015-08-31 11:06 ` Vladimir Sementsov-Ogievskiy
2015-08-31 22:39 ` Eric Blake
2015-08-31 22:50 ` Eric Blake
2015-06-10 23:42 ` John Snow
2015-06-11 8:35 ` Kevin Wolf
2015-06-11 10:49 ` Vladimir Sementsov-Ogievskiy
2015-06-11 16:36 ` John Snow
2015-06-08 15:21 ` [Qemu-devel] [PATCH 7/8] qemu: command line option " Vladimir Sementsov-Ogievskiy
2015-06-11 20:57 ` John Snow
2015-06-12 21:49 ` John Snow
2015-06-08 15:21 ` [Qemu-devel] [PATCH 8/8] iotests: test internal persistent dirty bitmap Vladimir Sementsov-Ogievskiy
2015-06-09 16:17 ` Eric Blake
2015-06-10 15:27 ` [Qemu-devel] [PATCH v2 RFC 0/8] block: persistent dirty bitmaps Stefan Hajnoczi
2015-06-11 11:22 ` Vladimir Sementsov-Ogievskiy
2015-06-11 13:14 ` Stefan Hajnoczi
2015-06-11 20:06 ` Stefan Hajnoczi
2015-06-12 9:58 ` Denis V. Lunev
2015-06-12 10:36 ` Stefan Hajnoczi
2015-08-26 6:26 ` Vladimir Sementsov-Ogievskiy
2015-08-26 9:13 ` Stefan Hajnoczi
2015-06-12 19:34 ` John Snow
2015-06-17 14:29 ` Vladimir Sementsov-Ogievskiy
2015-06-24 0:21 ` John Snow
2015-07-08 12:24 ` Vladimir Sementsov-Ogievskiy
2015-07-08 15:21 ` John Snow
2015-08-27 10:08 ` Vladimir Sementsov-Ogievskiy
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