diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/block/block.h | 8 | ||||
| -rw-r--r-- | include/block/block_int.h | 7 | ||||
| -rw-r--r-- | include/sysemu/block-backend.h | 1 |
3 files changed, 13 insertions, 3 deletions
diff --git a/include/block/block.h b/include/block/block.h index 740038a..e5dd22b 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -383,6 +383,10 @@ int bdrv_open_backing_file(BlockDriverState *bs, QDict *parent_options, const char *bdref_key, Error **errp); BlockDriverState *bdrv_open(const char *filename, const char *reference, QDict *options, int flags, Error **errp); +BlockDriverState *bdrv_new_open_driver_opts(BlockDriver *drv, + const char *node_name, + QDict *options, int flags, + Error **errp); BlockDriverState *bdrv_new_open_driver(BlockDriver *drv, const char *node_name, int flags, Error **errp); BlockReopenQueue *bdrv_reopen_queue(BlockReopenQueue *bs_queue, @@ -751,9 +755,7 @@ bool bdrv_drain_poll(BlockDriverState *bs, bool recursive, * bdrv_drained_begin: * * Begin a quiesced section for exclusive access to the BDS, by disabling - * external request sources including NBD server and device model. Note that - * this doesn't block timers or coroutines from submitting more requests, which - * means block_job_pause is still necessary. + * external request sources including NBD server, block jobs, and device model. * * This function can be recursive. */ diff --git a/include/block/block_int.h b/include/block/block_int.h index ffe8606..f4c75e8 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -718,6 +718,13 @@ typedef struct BlockLimits { */ uint64_t max_hw_transfer; + /* Maximal number of scatter/gather elements allowed by the hardware. + * Applies whenever transfers to the device bypass the kernel I/O + * scheduler, for example with SG_IO. If larger than max_iov + * or if zero, blk_get_max_hw_iov will fall back to max_iov. + */ + int max_hw_iov; + /* memory alignment, in bytes so that no bounce buffer is needed */ size_t min_mem_alignment; diff --git a/include/sysemu/block-backend.h b/include/sysemu/block-backend.h index 29d4fdb..82bae55 100644 --- a/include/sysemu/block-backend.h +++ b/include/sysemu/block-backend.h @@ -211,6 +211,7 @@ uint32_t blk_get_request_alignment(BlockBackend *blk); uint32_t blk_get_max_transfer(BlockBackend *blk); uint64_t blk_get_max_hw_transfer(BlockBackend *blk); int blk_get_max_iov(BlockBackend *blk); +int blk_get_max_hw_iov(BlockBackend *blk); void blk_set_guest_block_size(BlockBackend *blk, int align); void *blk_try_blockalign(BlockBackend *blk, size_t size); void *blk_blockalign(BlockBackend *blk, size_t size); |