4567474e95
Notable changes:
* bdrv_co_p{discard,readv,writev,write_zeroes} function signatures
changed, to using int64_t for offsets/bytes and some still had int
rather than BrdvRequestFlags for the flags.
* job_cancel_sync now has a force parameter. Commit messages in
73895f3838cd7fdaf185cf1dbc47be58844a966f
4cfb3f05627ad82af473e7f7ae113c3884cd04e3
sound like using force=true makes more sense.
* Added 3 patches coming in via qemu-stable tag, most important one is
to work around a librbd issue.
* Added another 3 patches from qemu-devel to fix issue leading to
crash when live migrating with iothread.
* cluster_size calculation helper changed (see patch pve/0026).
* QAPI's if conditionals now use 'CONFIG_FOO' rather than
'defined(CONFIG_FOO)'
Signed-off-by: Fabian Ebner <f.ebner@proxmox.com>
82 lines
3.0 KiB
Diff
82 lines
3.0 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: John Snow <jsnow@redhat.com>
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Date: Mon, 6 Apr 2020 12:17:04 +0200
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Subject: [PATCH] drive-mirror: add support for conditional and always bitmap
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sync modes
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Teach mirror two new tricks for using bitmaps:
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Always: no matter what, we synchronize the copy_bitmap back to the
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sync_bitmap. In effect, this allows us resume a failed mirror at a later
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date.
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Conditional: On success only, we sync the bitmap. This is akin to
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incremental backup modes; we can use this bitmap to later refresh a
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successfully created mirror.
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Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
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Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
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---
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block/mirror.c | 24 ++++++++++++++++++------
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1 file changed, 18 insertions(+), 6 deletions(-)
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diff --git a/block/mirror.c b/block/mirror.c
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index f7804638f9..4f5f74e2cf 100644
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--- a/block/mirror.c
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+++ b/block/mirror.c
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@@ -672,8 +672,6 @@ static int mirror_exit_common(Job *job)
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bdrv_unfreeze_backing_chain(mirror_top_bs, target_bs);
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}
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- bdrv_release_dirty_bitmap(s->dirty_bitmap);
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-
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/* Make sure that the source BDS doesn't go away during bdrv_replace_node,
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* before we can call bdrv_drained_end */
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bdrv_ref(src);
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@@ -781,6 +779,18 @@ static int mirror_exit_common(Job *job)
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blk_set_perm(bjob->blk, 0, BLK_PERM_ALL, &error_abort);
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blk_insert_bs(bjob->blk, mirror_top_bs, &error_abort);
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+ if (s->sync_bitmap) {
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+ if (s->bitmap_mode == BITMAP_SYNC_MODE_ALWAYS ||
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+ (s->bitmap_mode == BITMAP_SYNC_MODE_ON_SUCCESS &&
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+ job->ret == 0 && ret == 0)) {
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+ /* Success; synchronize copy back to sync. */
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+ bdrv_clear_dirty_bitmap(s->sync_bitmap, NULL);
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+ bdrv_merge_dirty_bitmap(s->sync_bitmap, s->dirty_bitmap,
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+ NULL, &error_abort);
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+ }
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+ }
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+ bdrv_release_dirty_bitmap(s->dirty_bitmap);
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+
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bs_opaque->job = NULL;
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bdrv_drained_end(src);
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@@ -1643,10 +1653,6 @@ static BlockJob *mirror_start_job(
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" sync mode",
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MirrorSyncMode_str(sync_mode));
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return NULL;
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- } else if (bitmap_mode != BITMAP_SYNC_MODE_NEVER) {
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- error_setg(errp,
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- "Bitmap Sync Mode '%s' is not supported by Mirror",
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- BitmapSyncMode_str(bitmap_mode));
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}
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} else if (bitmap) {
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error_setg(errp,
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@@ -1663,6 +1669,12 @@ static BlockJob *mirror_start_job(
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return NULL;
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}
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granularity = bdrv_dirty_bitmap_granularity(bitmap);
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+
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+ if (bitmap_mode != BITMAP_SYNC_MODE_NEVER) {
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+ if (bdrv_dirty_bitmap_check(bitmap, BDRV_BITMAP_DEFAULT, errp)) {
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+ return NULL;
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+ }
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+ }
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} else if (granularity == 0) {
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granularity = bdrv_get_default_bitmap_granularity(target);
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}
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