1#ifndef _LINUX_SUNRPC_RPC_PIPE_FS_H
2#define _LINUX_SUNRPC_RPC_PIPE_FS_H
3
4#ifdef __KERNEL__
5
6struct rpc_pipe_msg {
7	struct list_head list;
8	void *data;
9	size_t len;
10	size_t copied;
11	int errno;
12};
13
14struct rpc_pipe_ops {
15	ssize_t (*upcall)(struct file *, struct rpc_pipe_msg *, char __user *, size_t);
16	ssize_t (*downcall)(struct file *, const char __user *, size_t);
17	void (*release_pipe)(struct inode *);
18	void (*destroy_msg)(struct rpc_pipe_msg *);
19};
20
21struct rpc_inode {
22	struct inode vfs_inode;
23	void *private;
24	struct list_head pipe;
25	struct list_head in_upcall;
26	int pipelen;
27	int nreaders;
28	int nwriters;
29	wait_queue_head_t waitq;
30#define RPC_PIPE_WAIT_FOR_OPEN	1
31	int flags;
32	struct rpc_pipe_ops *ops;
33	struct delayed_work queue_timeout;
34};
35
36static inline struct rpc_inode *
37RPC_I(struct inode *inode)
38{
39	return container_of(inode, struct rpc_inode, vfs_inode);
40}
41
42extern int rpc_queue_upcall(struct inode *, struct rpc_pipe_msg *);
43
44extern struct dentry *rpc_mkdir(char *, struct rpc_clnt *);
45extern int rpc_rmdir(struct dentry *);
46extern struct dentry *rpc_mkpipe(struct dentry *, const char *, void *, struct rpc_pipe_ops *, int flags);
47extern int rpc_unlink(struct dentry *);
48extern struct vfsmount *rpc_get_mount(void);
49extern void rpc_put_mount(void);
50extern int register_rpc_pipefs(void);
51extern void unregister_rpc_pipefs(void);
52
53#endif
54#endif
55