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authorStefan Hajnoczi <stefanha@redhat.com>2012-11-14 11:43:23 +0100
committerStefan Hajnoczi <stefanha@redhat.com>2013-01-02 15:31:39 +0100
commit4065742ac0f3c84abdd8d718b44a88f3ac56015a (patch)
tree615c932c1b7941d992ef3a288c34d60656dac5b5 /include/block
parent5928023cef87847a295035487397b9ec701fdd6b (diff)
raw-posix: add raw_get_aio_fd() for virtio-blk-data-plane
The raw_get_aio_fd() function allows virtio-blk-data-plane to get the file descriptor of a raw image file with Linux AIO enabled. This interface is really a layering violation that can be resolved once the block layer is able to run outside the global mutex - at that point virtio-blk-data-plane will switch from custom Linux AIO code to using the block layer. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'include/block')
-rw-r--r--include/block/block.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/include/block/block.h b/include/block/block.h
index b81d200b03..0719339231 100644
--- a/include/block/block.h
+++ b/include/block/block.h
@@ -365,6 +365,15 @@ void bdrv_disable_copy_on_read(BlockDriverState *bs);
void bdrv_set_in_use(BlockDriverState *bs, int in_use);
int bdrv_in_use(BlockDriverState *bs);
+#ifdef CONFIG_LINUX_AIO
+int raw_get_aio_fd(BlockDriverState *bs);
+#else
+static inline int raw_get_aio_fd(BlockDriverState *bs)
+{
+ return -ENOTSUP;
+}
+#endif
+
enum BlockAcctType {
BDRV_ACCT_READ,
BDRV_ACCT_WRITE,