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authorKevin Wolf <kwolf@redhat.com>2016-07-06 11:22:39 +0200
committerKevin Wolf <kwolf@redhat.com>2016-09-05 19:06:47 +0200
commitcd7fca952ce8456955f7f4e11df9ced14204c2f1 (patch)
tree2d58a11ca8c6f967356c111e5750f9f8c924dd5a /include
parent0524e93a3fd7bff5bb4a584c372f2632ab7c0e0f (diff)
nbd-server: Use a separate BlockBackend
The builtin NBD server uses its own BlockBackend now instead of reusing the monitor/guest device one. This means that it has its own writethrough setting now. The builtin NBD server always uses writeback caching now regardless of whether the guest device has WCE enabled. qemu-nbd respects the cache mode given on the command line. We still need to keep a reference to the monitor BB because we put an eject notifier on it, but we don't use it for any I/O. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com>
Diffstat (limited to 'include')
-rw-r--r--include/block/nbd.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/block/nbd.h b/include/block/nbd.h
index 1897557a9b..80610ff31b 100644
--- a/include/block/nbd.h
+++ b/include/block/nbd.h
@@ -103,8 +103,9 @@ int nbd_disconnect(int fd);
typedef struct NBDExport NBDExport;
typedef struct NBDClient NBDClient;
-NBDExport *nbd_export_new(BlockBackend *blk, off_t dev_offset, off_t size,
+NBDExport *nbd_export_new(BlockDriverState *bs, off_t dev_offset, off_t size,
uint16_t nbdflags, void (*close)(NBDExport *),
+ bool writethrough, BlockBackend *on_eject_blk,
Error **errp);
void nbd_export_close(NBDExport *exp);
void nbd_export_get(NBDExport *exp);