diff options
Diffstat (limited to 'block')
| -rw-r--r-- | block/block-backend.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/block/block-backend.c b/block/block-backend.c index cf58d4d1b7..55efc735b4 100644 --- a/block/block-backend.c +++ b/block/block-backend.c @@ -1629,6 +1629,23 @@ int64_t coroutine_fn blk_co_nb_sectors(BlockBackend *blk) } } +/* + * This wrapper is written by hand because this function is in the hot I/O path, + * via blk_get_geometry. + */ +int64_t coroutine_mixed_fn blk_nb_sectors(BlockBackend *blk) +{ + BlockDriverState *bs = blk_bs(blk); + + IO_CODE(); + + if (!bs) { + return -ENOMEDIUM; + } else { + return bdrv_nb_sectors(bs); + } +} + /* return 0 as number of sectors if no device present or error */ void coroutine_fn blk_co_get_geometry(BlockBackend *blk, uint64_t *nb_sectors_ptr) @@ -1637,6 +1654,16 @@ void coroutine_fn blk_co_get_geometry(BlockBackend *blk, *nb_sectors_ptr = ret < 0 ? 0 : ret; } +/* + * This wrapper is written by hand because this function is in the hot I/O path. + */ +void coroutine_mixed_fn blk_get_geometry(BlockBackend *blk, + uint64_t *nb_sectors_ptr) +{ + int64_t ret = blk_nb_sectors(blk); + *nb_sectors_ptr = ret < 0 ? 0 : ret; +} + BlockAIOCB *blk_aio_preadv(BlockBackend *blk, int64_t offset, QEMUIOVector *qiov, BdrvRequestFlags flags, BlockCompletionFunc *cb, void *opaque) |