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authorLinus Torvalds <torvalds@linux-foundation.org>2009-09-18 09:23:03 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-09-18 09:23:03 -0700
commit9eead2a8115d2a6aecf267c292f751f7761fa5f8 (patch)
tree133cc2c9616bbc53b92fdf68137621a11e3c80c6 /include/linux
parent6f130478e24d810078c3f0ee292bcc4ec034dcce (diff)
parent79a9d99434b104c562f30f21b75317667f444793 (diff)
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse: fuse: add fusectl interface to max_background fuse: limit user-specified values of max background requests fuse: use drop_nlink() instead of direct nlink manipulation fuse: document protocol version negotiation fuse: make the number of max background requests and congestion threshold tunable
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/fuse.h29
1 files changed, 27 insertions, 2 deletions
diff --git a/include/linux/fuse.h b/include/linux/fuse.h
index cf593bf9fd3..3e2925a34bf 100644
--- a/include/linux/fuse.h
+++ b/include/linux/fuse.h
@@ -30,6 +30,10 @@
* - 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 _LINUX_FUSE_H
@@ -37,11 +41,31 @@
#include <linux/types.h>
+/*
+ * Version negotiation:
+ *
+ * Both the kernel and userspace send the version they support in the
+ * INIT request and reply respectively.
+ *
+ * If the major versions match then both shall use the smallest
+ * of the two minor versions for communication.
+ *
+ * If the kernel supports a larger major version, then userspace shall
+ * reply with the major version it supports, ignore the rest of the
+ * INIT message and expect a new INIT message from the kernel with a
+ * matching major version.
+ *
+ * If the library supports a larger major version, then it shall fall
+ * back to the major protocol version sent by the kernel for
+ * communication and reply with that major version (and an arbitrary
+ * supported minor version).
+ */
+
/** Version number of this interface */
#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
@@ -427,7 +451,8 @@ struct fuse_init_out {
__u32 minor;
__u32 max_readahead;
__u32 flags;
- __u32 unused;
+ __u16 max_background;
+ __u16 congestion_threshold;
__u32 max_write;
};