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 * 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