diff options
Diffstat (limited to 'include/block/block_int.h')
| -rw-r--r-- | include/block/block_int.h | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/include/block/block_int.h b/include/block/block_int.h index 10f4962fe8..2709488ff1 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -161,8 +161,8 @@ struct BlockDriver { /* * Efficiently zero a region of the disk image. Typically an image format * would use a compact metadata representation to implement this. This - * function pointer may be NULL and .bdrv_co_writev() will be called - * instead. + * function pointer may be NULL or return -ENOSUP and .bdrv_co_writev() + * will be called instead. */ int coroutine_fn (*bdrv_co_write_zeroes)(BlockDriverState *bs, int64_t sector_num, int nb_sectors, BdrvRequestFlags flags); @@ -445,6 +445,9 @@ struct BlockDriverState { unsigned int request_alignment; /* Flags honored during pwrite (so far: BDRV_REQ_FUA) */ unsigned int supported_write_flags; + /* Flags honored during write_zeroes (so far: BDRV_REQ_FUA, + * BDRV_REQ_MAY_UNMAP) */ + unsigned int supported_zero_flags; /* the following member gives a name to every node on the bs graph. */ char node_name[32]; |