From: Stefan Hajnoczi <stefa...@linux.vnet.ibm.com> Several block drivers set bs->read_only in .bdrv_open() but block.c:bdrv_open_common() clobbers its value. Additionally, QED uses bdrv_is_read_only() in .bdrv_open() to decide whether to perform consistency checks.
The correct ordering is to initialize bs->read_only from the open flags before calling .bdrv_open(). This way block drivers can override it if necessary and can use bdrv_is_read_only() in .bdrv_open(). Signed-off-by: Stefan Hajnoczi <stefa...@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kw...@redhat.com> --- block.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/block.c b/block.c index d5ec0be..cb37086 100644 --- a/block.c +++ b/block.c @@ -500,6 +500,8 @@ static int bdrv_open_common(BlockDriverState *bs, const char *filename, open_flags |= BDRV_O_RDWR; } + bs->keep_read_only = bs->read_only = !(open_flags & BDRV_O_RDWR); + /* Open the image, either directly or using a protocol */ if (drv->bdrv_file_open) { ret = drv->bdrv_file_open(bs, filename, open_flags); @@ -514,8 +516,6 @@ static int bdrv_open_common(BlockDriverState *bs, const char *filename, goto free_and_fail; } - bs->keep_read_only = bs->read_only = !(open_flags & BDRV_O_RDWR); - ret = refresh_total_sectors(bs, bs->total_sectors); if (ret < 0) { goto free_and_fail; -- 1.7.6.4