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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse

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* '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
This commit is contained in:
Linus Torvalds 2009-09-18 09:23:03 -07:00
commit 9eead2a811
5 changed files with 258 additions and 17 deletions
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29
include/linux/fuse.h
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@ -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;
};