1 #ifndef _LINUX_SUNRPC_RPC_PIPE_FS_H
2 #define _LINUX_SUNRPC_RPC_PIPE_FS_H
3
4 #ifdef __KERNEL__
5
6 #include <linux/workqueue.h>
7
8 struct rpc_pipe_msg {
9 struct list_head list;
10 void *data;
11 size_t len;
12 size_t copied;
13 int errno;
14 };
15
16 struct rpc_pipe_ops {
17 ssize_t (*upcall)(struct file *, struct rpc_pipe_msg *, char __user *, size_t);
18 ssize_t (*downcall)(struct file *, const char __user *, size_t);
19 void (*release_pipe)(struct inode *);
20 int (*open_pipe)(struct inode *);
21 void (*destroy_msg)(struct rpc_pipe_msg *);
22 };
23
24 struct rpc_inode {
25 struct inode vfs_inode;
26 void *private;
27 struct list_head pipe;
28 struct list_head in_upcall;
29 struct list_head in_downcall;
30 int pipelen;
31 int nreaders;
32 int nwriters;
33 int nkern_readwriters;
34 wait_queue_head_t waitq;
35 #define RPC_PIPE_WAIT_FOR_OPEN 1
36 int flags;
37 struct delayed_work queue_timeout;
38 const struct rpc_pipe_ops *ops;
39 };
40
41 static inline struct rpc_inode *
RPC_I(struct inode * inode)42 RPC_I(struct inode *inode)
43 {
44 return container_of(inode, struct rpc_inode, vfs_inode);
45 }
46
47 extern int rpc_queue_upcall(struct inode *, struct rpc_pipe_msg *);
48
49 struct rpc_clnt;
50 extern struct dentry *rpc_create_client_dir(struct dentry *, struct qstr *, struct rpc_clnt *);
51 extern int rpc_remove_client_dir(struct dentry *);
52
53 struct cache_detail;
54 extern struct dentry *rpc_create_cache_dir(struct dentry *,
55 struct qstr *,
56 mode_t umode,
57 struct cache_detail *);
58 extern void rpc_remove_cache_dir(struct dentry *);
59
60 extern struct dentry *rpc_mkpipe(struct dentry *, const char *, void *,
61 const struct rpc_pipe_ops *, int flags);
62 extern int rpc_unlink(struct dentry *);
63 extern struct vfsmount *rpc_get_mount(void);
64 extern void rpc_put_mount(void);
65 extern int register_rpc_pipefs(void);
66 extern void unregister_rpc_pipefs(void);
67
68 #endif
69 #endif
70