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, ®->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); |
} |
|
/** @} |
*/ |