diff options
Diffstat (limited to 'include/block/block_int.h')
| -rw-r--r-- | include/block/block_int.h | 36 |
1 files changed, 30 insertions, 6 deletions
diff --git a/include/block/block_int.h b/include/block/block_int.h index 791de6a59c..3d6cf88592 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -123,7 +123,17 @@ struct BlockDriver { */ bool bdrv_needs_filename; - /* Set if a driver can support backing files */ + /* + * Set if a driver can support backing files. This also implies the + * following semantics: + * + * - Return status 0 of .bdrv_co_block_status means that corresponding + * blocks are not allocated in this layer of backing-chain + * - For such (unallocated) blocks, read will: + * - fill buffer with zeros if there is no backing file + * - read from the backing file otherwise, where the block layer + * takes care of reading zeros beyond EOF if backing file is short + */ bool supports_backing; /* For handling image reopen for split or non-split files */ @@ -141,12 +151,27 @@ struct BlockDriver { int (*bdrv_file_open)(BlockDriverState *bs, QDict *options, int flags, Error **errp); void (*bdrv_close)(BlockDriverState *bs); + + int coroutine_fn (*bdrv_co_create)(BlockdevCreateOptions *opts, Error **errp); int coroutine_fn (*bdrv_co_create_opts)(BlockDriver *drv, const char *filename, QemuOpts *opts, Error **errp); + + int coroutine_fn (*bdrv_co_amend)(BlockDriverState *bs, + BlockdevAmendOptions *opts, + bool force, + Error **errp); + + int (*bdrv_amend_options)(BlockDriverState *bs, + QemuOpts *opts, + BlockDriverAmendStatusCB *status_cb, + void *cb_opaque, + bool force, + Error **errp); + int (*bdrv_make_empty)(BlockDriverState *bs); /* @@ -420,6 +445,10 @@ struct BlockDriver { /* List of options for creating images, terminated by name == NULL */ QemuOptsList *create_opts; + + /* List of options for image amend */ + QemuOptsList *amend_opts; + /* * If this driver supports reopening images this contains a * NULL-terminated list of the runtime options that can be @@ -437,11 +466,6 @@ struct BlockDriver { BdrvCheckResult *result, BdrvCheckMode fix); - int (*bdrv_amend_options)(BlockDriverState *bs, QemuOpts *opts, - BlockDriverAmendStatusCB *status_cb, - void *cb_opaque, - Error **errp); - void (*bdrv_debug_event)(BlockDriverState *bs, BlkdebugEvent event); /* TODO Better pass a option string/QDict/QemuOpts to add any rule? */ |