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 int (*open_pipe)(struct inode *);
19 void (*destroy_msg)(struct rpc_pipe_msg *);
20 };
21
22 struct rpc_inode {
23 struct inode vfs_inode;
24 void *private;
25 struct list_head pipe;
26 struct list_head in_upcall;
27 struct list_head in_downcall;
28 int pipelen;
29 int nreaders;
30 int nwriters;
31 int nkern_readwriters;
32 wait_queue_head_t waitq;
33 #define RPC_PIPE_WAIT_FOR_OPEN 1
34 int flags;
35 struct rpc_pipe_ops *ops;
36 struct delayed_work queue_timeout;
37 };
38
39 static inline struct rpc_inode *
RPC_I(struct inode * inode)40 RPC_I(struct inode *inode)
41 {
42 return container_of(inode, struct rpc_inode, vfs_inode);
43 }
44
45 extern int rpc_queue_upcall(struct inode *, struct rpc_pipe_msg *);
46
47 extern struct dentry *rpc_mkdir(char *, struct rpc_clnt *);
48 extern int rpc_rmdir(struct dentry *);
49 extern struct dentry *rpc_mkpipe(struct dentry *, const char *, void *, struct rpc_pipe_ops *, int flags);
50 extern int rpc_unlink(struct dentry *);
51 extern struct vfsmount *rpc_get_mount(void);
52 extern void rpc_put_mount(void);
53 extern int register_rpc_pipefs(void);
54 extern void unregister_rpc_pipefs(void);
55
56 #endif
57 #endif
58