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authorVladimir Sementsov-Ogievskiy <vsementsov@parallels.com>2014-11-27 12:40:46 +0300
committerStefan Hajnoczi <stefanha@redhat.com>2015-01-13 11:47:56 +0000
commitc4237dfa635900e4d1cdc6038d5efe3507f45f0c (patch)
tree7fc75bed155cc91b5164bf49cdf10f75017b814a /migration
parenta06e43556e3faea22de4cce0da7a6f362d3ca9a6 (diff)
block: fix spoiling all dirty bitmaps by mirror and migration
Mirror and migration use dirty bitmaps for their purposes, and since commit [block: per caller dirty bitmap] they use their own bitmaps, not the global one. But they use old functions bdrv_set_dirty and bdrv_reset_dirty, which change all dirty bitmaps. Named dirty bitmaps series by Fam and Snow are affected: mirroring and migration will spoil all (not related to this mirroring or migration) named dirty bitmaps. This patch fixes this by adding bdrv_set_dirty_bitmap and bdrv_reset_dirty_bitmap, which change concrete bitmap. Also, to prevent such mistakes in future, old functions bdrv_(set,reset)_dirty are made static, for internal block usage. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@parallels.com> CC: John Snow <jsnow@redhat.com> CC: Fam Zheng <famz@redhat.com> CC: Denis V. Lunev <den@openvz.org> CC: Stefan Hajnoczi <stefanha@redhat.com> CC: Kevin Wolf <kwolf@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com> Reviewed-by: Fam Zheng <famz@redhat.com> Message-id: 1417081246-3593-1-git-send-email-vsementsov@parallels.com Signed-off-by: Max Reitz <mreitz@redhat.com>
Diffstat (limited to 'migration')
-rw-r--r--migration/block.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/migration/block.c b/migration/block.c
index 74d9eb125c..a0f908cf98 100644
--- a/migration/block.c
+++ b/migration/block.c
@@ -303,7 +303,7 @@ static int mig_save_device_bulk(QEMUFile *f, BlkMigDevState *bmds)
blk->aiocb = bdrv_aio_readv(bs, cur_sector, &blk->qiov,
nr_sectors, blk_mig_read_cb, blk);
- bdrv_reset_dirty(bs, cur_sector, nr_sectors);
+ bdrv_reset_dirty_bitmap(bs, bmds->dirty_bitmap, cur_sector, nr_sectors);
qemu_mutex_unlock_iothread();
bmds->cur_sector = cur_sector + nr_sectors;
@@ -496,7 +496,8 @@ static int mig_save_device_dirty(QEMUFile *f, BlkMigDevState *bmds,
g_free(blk);
}
- bdrv_reset_dirty(bmds->bs, sector, nr_sectors);
+ bdrv_reset_dirty_bitmap(bmds->bs, bmds->dirty_bitmap, sector,
+ nr_sectors);
break;
}
sector += BDRV_SECTORS_PER_DIRTY_CHUNK;