diff options
| author | Ming Lei <ming.lei@canonical.com> | 2014-07-04 18:04:34 +0800 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2014-07-07 11:05:17 +0200 |
| commit | 1b3abdcccf18d98c3952b41be0bc1db3ef6009dd (patch) | |
| tree | 207b4496a9ab8fb7d19f7860ba59b52b355efcb7 /block/raw-posix.c | |
| parent | 448ad91db4a560c01f89bd6f7e4bec7d869926a5 (diff) | |
| download | qemu-1b3abdcccf18d98c3952b41be0bc1db3ef6009dd.tar.gz | |
linux-aio: implement io plug, unplug and flush io queue
This patch implements .bdrv_io_plug, .bdrv_io_unplug and
.bdrv_flush_io_queue callbacks for linux-aio Block Drivers,
so that submitting I/O as a batch can be supported on linux-aio.
[Unprocessed requests are completed with -EIO instead of a bogus ret
value.
--Stefan]
Signed-off-by: Ming Lei <ming.lei@canonical.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'block/raw-posix.c')
| -rw-r--r-- | block/raw-posix.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/block/raw-posix.c b/block/raw-posix.c index fa005b38b7..a857def671 100644 --- a/block/raw-posix.c +++ b/block/raw-posix.c @@ -1057,6 +1057,36 @@ static BlockDriverAIOCB *raw_aio_submit(BlockDriverState *bs, cb, opaque, type); } +static void raw_aio_plug(BlockDriverState *bs) +{ +#ifdef CONFIG_LINUX_AIO + BDRVRawState *s = bs->opaque; + if (s->use_aio) { + laio_io_plug(bs, s->aio_ctx); + } +#endif +} + +static void raw_aio_unplug(BlockDriverState *bs) +{ +#ifdef CONFIG_LINUX_AIO + BDRVRawState *s = bs->opaque; + if (s->use_aio) { + laio_io_unplug(bs, s->aio_ctx, true); + } +#endif +} + +static void raw_aio_flush_io_queue(BlockDriverState *bs) +{ +#ifdef CONFIG_LINUX_AIO + BDRVRawState *s = bs->opaque; + if (s->use_aio) { + laio_io_unplug(bs, s->aio_ctx, false); + } +#endif +} + static BlockDriverAIOCB *raw_aio_readv(BlockDriverState *bs, int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, BlockDriverCompletionFunc *cb, void *opaque) @@ -1544,6 +1574,9 @@ static BlockDriver bdrv_file = { .bdrv_aio_flush = raw_aio_flush, .bdrv_aio_discard = raw_aio_discard, .bdrv_refresh_limits = raw_refresh_limits, + .bdrv_io_plug = raw_aio_plug, + .bdrv_io_unplug = raw_aio_unplug, + .bdrv_flush_io_queue = raw_aio_flush_io_queue, .bdrv_truncate = raw_truncate, .bdrv_getlength = raw_getlength, @@ -1943,6 +1976,9 @@ static BlockDriver bdrv_host_device = { .bdrv_aio_flush = raw_aio_flush, .bdrv_aio_discard = hdev_aio_discard, .bdrv_refresh_limits = raw_refresh_limits, + .bdrv_io_plug = raw_aio_plug, + .bdrv_io_unplug = raw_aio_unplug, + .bdrv_flush_io_queue = raw_aio_flush_io_queue, .bdrv_truncate = raw_truncate, .bdrv_getlength = raw_getlength, @@ -2088,6 +2124,9 @@ static BlockDriver bdrv_host_floppy = { .bdrv_aio_writev = raw_aio_writev, .bdrv_aio_flush = raw_aio_flush, .bdrv_refresh_limits = raw_refresh_limits, + .bdrv_io_plug = raw_aio_plug, + .bdrv_io_unplug = raw_aio_unplug, + .bdrv_flush_io_queue = raw_aio_flush_io_queue, .bdrv_truncate = raw_truncate, .bdrv_getlength = raw_getlength, @@ -2216,6 +2255,9 @@ static BlockDriver bdrv_host_cdrom = { .bdrv_aio_writev = raw_aio_writev, .bdrv_aio_flush = raw_aio_flush, .bdrv_refresh_limits = raw_refresh_limits, + .bdrv_io_plug = raw_aio_plug, + .bdrv_io_unplug = raw_aio_unplug, + .bdrv_flush_io_queue = raw_aio_flush_io_queue, .bdrv_truncate = raw_truncate, .bdrv_getlength = raw_getlength, @@ -2350,6 +2392,9 @@ static BlockDriver bdrv_host_cdrom = { .bdrv_aio_writev = raw_aio_writev, .bdrv_aio_flush = raw_aio_flush, .bdrv_refresh_limits = raw_refresh_limits, + .bdrv_io_plug = raw_aio_plug, + .bdrv_io_unplug = raw_aio_unplug, + .bdrv_flush_io_queue = raw_aio_flush_io_queue, .bdrv_truncate = raw_truncate, .bdrv_getlength = raw_getlength, |