rpc_mkpipe(9)
NAME
rpc_mkpipe - make an rpc_pipefs file for kernel<->userspace
communication
SYNOPSIS
struct dentry * rpc_mkpipe(struct dentry * parent, const char * name,
void * private, struct rpc_pipe_ops * ops,
int flags);
ARGUMENTS
- parent
- dentry of directory to create new "pipe" in
- name
- name of pipe
- private
- private data to associate with the pipe, for the caller´s use
- ops
- operations defining the behavior of the pipe: upcall, downcall,
release_pipe, and destroy_msg. - flags
- rpc_inode flags
DESCRIPTION
Data is made available for userspace to read by calls to
rpc_queue_upcall. The actual reads will result in calls to ops->upcall,
which will be called with the file pointer, message, and userspace
buffer to copy to.
Writes can come at any time, and do not necessarily have to be
responses to upcalls. They will result in calls to msg->downcall.
The private argument passed here will be available to all these methods
from the file pointer, via RPC_I(file->f_dentry->d_inode)->private.