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