diff options
Diffstat (limited to 'include/block')
| -rw-r--r-- | include/block/block_int-common.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/block/block_int-common.h b/include/block/block_int-common.h index d419017328..a6d271f25d 100644 --- a/include/block/block_int-common.h +++ b/include/block/block_int-common.h @@ -855,6 +855,14 @@ typedef struct BlockLimits { /* maximum number of iovec elements */ int max_iov; + + /* + * true if the length of the underlying file can change, and QEMU + * is expected to adjust automatically. Mostly for CD-ROM drives, + * whose length is zero when the tray is empty (they don't need + * an explicit monitor command to load the disk inside the guest). + */ + bool has_variable_length; } BlockLimits; typedef struct BdrvOpBlocker BdrvOpBlocker; |