1 #ifndef _LINUX_SUNRPC_RPC_PIPE_FS_H
2 #define _LINUX_SUNRPC_RPC_PIPE_FS_H
3
4 #ifdef __KERNEL__
5
6 struct rpc_pipe_msg {
7 struct list_head list;
8 void *data;
9 size_t len;
10 size_t copied;
11 int errno;
12 };
13
14 struct 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
21 struct rpc_inode {
22 struct inode vfs_inode;
23 void *private;
24 struct list_head pipe;
25 struct list_head in_upcall;
26 struct list_head in_downcall;
27 int pipelen;
28 int nreaders;
29 int nwriters;
30 int nkern_readwriters;
31 wait_queue_head_t waitq;
32 #define RPC_PIPE_WAIT_FOR_OPEN 1
33 int flags;
34 struct rpc_pipe_ops *ops;
35 struct delayed_work queue_timeout;
36 };
37
38 static inline struct rpc_inode *
39 RPC_I(struct inode *inode)
40 {
41 return container_of(inode, struct rpc_inode, vfs_inode);
42 }
43
44 extern int rpc_queue_upcall(struct inode *, struct rpc_pipe_msg *);
45
46 extern struct dentry *rpc_mkdir(char *, struct rpc_clnt *);
47 extern int rpc_rmdir(struct dentry *);
48 extern struct dentry *rpc_mkpipe(struct dentry *, const char *, void *, struct rpc_pipe_ops *, int flags);
49 extern int rpc_unlink(struct dentry *);
50 extern struct vfsmount *rpc_get_mount(void);
51 extern void rpc_put_mount(void);
52 extern int register_rpc_pipefs(void);
53 extern void unregister_rpc_pipefs(void);
54
55 #endif
56 #endif
57
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