fusefs: raise protocol level to 7.13

This protocol version adds one new feature: the ability for the server to
set the maximum number of background requests and a "congestion threshold"
with ill-defined properties.  I don't know of any fuse file systems in ports
that use this feature, so I'm not implementing it.

Sponsored by:	The FreeBSD Foundation

1 files changed, 8 insertions, 2 deletions

diff --git a/sys/fs/fuse/fuse_kernel.h b/sys/fs/fuse/fuse_kernel.h
index 6c7f91aa3cf2..01ae75cf8c5e 100644
--- a/sys/fs/fuse/fuse_kernel.h
+++ b/sys/fs/fuse/fuse_kernel.h
@@ -57,6 +57,10 @@
  *  - add umask flag to input argument of open, mknod and mkdir
  *  - add notification messages for invalidation of inodes and
  *    directory entries
+ *
+ * 7.13
+ *  - make max number of background requests and congestion threshold
+ *    tunables
  */
 
 #ifndef _FUSE_FUSE_KERNEL_H
@@ -68,6 +72,7 @@
 #define __s64 int64_t
 #define __u32 uint32_t
 #define __s32 int32_t
+#define __u16 uint16_t
 #else
 #include <linux/types.h>
 #endif
@@ -76,7 +81,7 @@
 #define FUSE_KERNEL_VERSION 7
 
 /** Minor version number of this interface */
-#define FUSE_KERNEL_MINOR_VERSION 12
+#define FUSE_KERNEL_MINOR_VERSION 13
 
 /** The node ID of the root inode */
 #define FUSE_ROOT_ID 1
@@ -476,7 +481,8 @@ struct fuse_init_out {
 	__u32	minor;
 	__u32	max_readahead;
 	__u32	flags;
-	__u32	unused;
+	__u16   max_background;
+	__u16   congestion_threshold;
 	__u32	max_write;
 };