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migration/block: reset dirty bitmap before reading 

Any data that is returned by read may be stale already, the bitmap
has to be cleared before issuing the read.

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20170605123908.18777-16-pbonzini@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
master
Paolo Bonzini 2017-06-05 14:39:04 +02:00 committed by Fam Zheng
parent 2119882c7e
commit c0bad49946
1 changed files with 2 additions and 1 deletions
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3
migration/block.c
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@ -532,6 +532,8 @@ static int mig_save_device_dirty(QEMUFile *f, BlkMigDevState *bmds,
} else {
nr_sectors = BDRV_SECTORS_PER_DIRTY_CHUNK;
}
bdrv_reset_dirty_bitmap(bmds->dirty_bitmap, sector, nr_sectors);
blk = g_new(BlkMigBlock, 1);
blk->buf = g_malloc(BLOCK_SIZE);
blk->bmds = bmds;
@ -564,7 +566,6 @@ static int mig_save_device_dirty(QEMUFile *f, BlkMigDevState *bmds,
g_free(blk);
}
bdrv_reset_dirty_bitmap(bmds->dirty_bitmap, sector, nr_sectors);
sector += nr_sectors;
bmds->cur_dirty = sector;