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Ignore whitespace Rev 2678 → Rev 2747

/branches/network/uspace/lib/libfs/libfs.c
0,0 → 1,124
/*
* Copyright (c) 2007 Jakub Jermar
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
 
/** @addtogroup libfs
* @{
*/
/**
* @file
* Glue code which is commonod to all FS implementations.
*/
 
#include "libfs.h"
#include "../../srv/vfs/vfs.h"
#include <errno.h>
#include <async.h>
#include <ipc/ipc.h>
#include <as.h>
 
/** Register file system server.
*
* This function abstracts away the tedious registration protocol from
* file system implementations and lets them to reuse this registration glue
* code.
*
* @param vfs_phone Open phone for communication with VFS.
* @param reg File system registration structure. It will be
* initialized by this function.
* @param info VFS info structure supplied by the file system
* implementation.
* @param conn Connection fibril for handling all calls originating in
* VFS.
*
* @return EOK on success or a non-zero error code on errror.
*/
int fs_register(int vfs_phone, fs_reg_t *reg, vfs_info_t *info,
async_client_conn_t conn)
{
/*
* Tell VFS that we are here and want to get registered.
* We use the async framework because VFS will answer the request
* out-of-order, when it knows that the operation succeeded or failed.
*/
ipc_call_t answer;
aid_t req = async_send_0(vfs_phone, VFS_REGISTER, &answer);
 
/*
* Send our VFS info structure to VFS.
*/
int rc = ipc_data_write_start(vfs_phone, info, sizeof(*info));
if (rc != EOK) {
async_wait_for(req, NULL);
return rc;
}
 
/*
* Ask VFS for callback connection.
*/
ipc_connect_to_me(vfs_phone, 0, 0, 0, &reg->vfs_phonehash);
 
/*
* Allocate piece of address space for PLB.
*/
reg->plb_ro = as_get_mappable_page(PLB_SIZE);
if (!reg->plb_ro) {
async_wait_for(req, NULL);
return ENOMEM;
}
 
/*
* Request sharing the Path Lookup Buffer with VFS.
*/
rc = ipc_share_in_start_0_0(vfs_phone, reg->plb_ro, PLB_SIZE);
if (rc) {
async_wait_for(req, NULL);
return rc;
}
/*
* Pick up the answer for the request to the VFS_REQUEST call.
*/
async_wait_for(req, NULL);
reg->fs_handle = (int) IPC_GET_ARG1(answer);
/*
* Create a connection fibril to handle the callback connection.
*/
async_new_connection(reg->vfs_phonehash, 0, NULL, conn);
/*
* Tell the async framework that other connections are to be handled by
* the same connection fibril as well.
*/
async_set_client_connection(conn);
 
return IPC_GET_RETVAL(answer);
}
 
/** @}
*/