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author | Kevin Wolf <kwolf@redhat.com> | 2011-07-14 17:27:13 +0200 |
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committer | Kevin Wolf <kwolf@redhat.com> | 2011-08-02 15:53:40 +0200 |
commit | da1fa91d6cca8a6d3da9c2b222fa485429db297c (patch) | |
tree | c77f342d36c65fb1773c1f9c563f2d5b531e6f4e /block.h | |
parent | 5e3840ce24040cbd1957008489cbc136c43ca391 (diff) | |
download | qemu-da1fa91d6cca8a6d3da9c2b222fa485429db297c.zip qemu-da1fa91d6cca8a6d3da9c2b222fa485429db297c.tar.gz qemu-da1fa91d6cca8a6d3da9c2b222fa485429db297c.tar.bz2 |
block: Add bdrv_co_readv/writev
Add new block driver callbacks bdrv_co_readv/writev, which work on a
QEMUIOVector like bdrv_aio_*, but don't need a callback. The function may only
be called inside a coroutine, so a block driver implementing this interface can
yield instead of blocking during I/O.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'block.h')
-rw-r--r-- | block.h | 5 |
1 files changed, 5 insertions, 0 deletions
@@ -4,6 +4,7 @@ #include "qemu-aio.h" #include "qemu-common.h" #include "qemu-option.h" +#include "qemu-coroutine.h" #include "qobject.h" /* block.c */ @@ -85,6 +86,10 @@ int bdrv_pwrite(BlockDriverState *bs, int64_t offset, const void *buf, int count); int bdrv_pwrite_sync(BlockDriverState *bs, int64_t offset, const void *buf, int count); +int coroutine_fn bdrv_co_readv(BlockDriverState *bs, int64_t sector_num, + int nb_sectors, QEMUIOVector *qiov); +int coroutine_fn bdrv_co_writev(BlockDriverState *bs, int64_t sector_num, + int nb_sectors, QEMUIOVector *qiov); int bdrv_truncate(BlockDriverState *bs, int64_t offset); int64_t bdrv_getlength(BlockDriverState *bs); int64_t bdrv_get_allocated_file_size(BlockDriverState *bs); |