diff options
| author | Eric Blake <eblake@redhat.com> | 2016-06-13 12:56:35 -0600 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2016-06-16 15:19:55 +0200 |
| commit | fa166538743d4e28de7374c41332c3e448826f4b (patch) | |
| tree | 38862e89a19f63d9331ff03df6447e7acddbd209 | |
| parent | 73698c30caaf16e990b8b2e6e7bc64928947e65e (diff) | |
block: Assert that flags are in range
Add a new BDRV_REQ_MASK constant, and use it to make sure that
caller flags are always valid.
Tested with 'make check' and with qemu-iotests on both '-raw'
and '-qcow2'; the only failure turned up was fixed in the
previous commit.
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
| -rw-r--r-- | block/io.c | 6 | ||||
| -rw-r--r-- | include/block/block.h | 3 |
2 files changed, 9 insertions, 0 deletions
diff --git a/block/io.c b/block/io.c index fb99a7151c..5b2017fedc 100644 --- a/block/io.c +++ b/block/io.c @@ -776,6 +776,8 @@ static int coroutine_fn bdrv_driver_preadv(BlockDriverState *bs, int64_t sector_num; unsigned int nb_sectors; + assert(!(flags & ~BDRV_REQ_MASK)); + if (drv->bdrv_co_preadv) { return drv->bdrv_co_preadv(bs, offset, bytes, qiov, flags); } @@ -815,6 +817,8 @@ static int coroutine_fn bdrv_driver_pwritev(BlockDriverState *bs, unsigned int nb_sectors; int ret; + assert(!(flags & ~BDRV_REQ_MASK)); + if (drv->bdrv_co_pwritev) { ret = drv->bdrv_co_pwritev(bs, offset, bytes, qiov, flags & bs->supported_write_flags); @@ -953,6 +957,7 @@ static int coroutine_fn bdrv_aligned_preadv(BlockDriverState *bs, assert((bytes & (BDRV_SECTOR_SIZE - 1)) == 0); assert(!qiov || bytes == qiov->size); assert((bs->open_flags & BDRV_O_NO_IO) == 0); + assert(!(flags & ~BDRV_REQ_MASK)); /* Handle Copy on Read and associated serialisation */ if (flags & BDRV_REQ_COPY_ON_READ) { @@ -1242,6 +1247,7 @@ static int coroutine_fn bdrv_aligned_pwritev(BlockDriverState *bs, assert((bytes & (BDRV_SECTOR_SIZE - 1)) == 0); assert(!qiov || bytes == qiov->size); assert((bs->open_flags & BDRV_O_NO_IO) == 0); + assert(!(flags & ~BDRV_REQ_MASK)); waited = wait_serialising_requests(req); assert(!waited || !req->serialising); diff --git a/include/block/block.h b/include/block/block.h index 54cca28bac..8cabcddf6c 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -65,6 +65,9 @@ typedef enum { BDRV_REQ_MAY_UNMAP = 0x4, BDRV_REQ_NO_SERIALISING = 0x8, BDRV_REQ_FUA = 0x10, + + /* Mask of valid flags */ + BDRV_REQ_MASK = 0x1f, } BdrvRequestFlags; typedef struct BlockSizes { |