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| Rev | Author | Line No. | Line |
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| 2518 | jermar | 1 | /* |
| 2 | * Copyright (c) 2007 Jakub Jermar |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 29 | /** @addtogroup fs |
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| 30 | * @{ |
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| 31 | */ |
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| 32 | |||
| 33 | /** |
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| 34 | * @file vfs.c |
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| 35 | * @brief VFS multiplexer for HelenOS. |
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| 36 | */ |
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| 37 | |||
| 2520 | jermar | 38 | #include <ipc/ipc.h> |
| 39 | #include <ipc/services.h> |
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| 40 | #include <async.h> |
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| 41 | #include <errno.h> |
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| 42 | #include "vfs.h" |
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| 43 | |||
| 2521 | jermar | 44 | static void vfs_register(ipc_callid_t iid, ipc_call_t *icall) |
| 45 | { |
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| 46 | ipc_callid_t callid; |
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| 47 | ipc_call_t call; |
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| 48 | |||
| 49 | callid = async_get_call(&call); |
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| 50 | if (IPC_GET_METHOD(call) == IPC_M_DATA_SEND) { |
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| 51 | size_t size = IPC_GET_ARG3(call); |
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| 52 | if (size != sizeof(vfs_info_t)) { |
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| 53 | /* |
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| 54 | * The client is sending us something, which cannot be |
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| 55 | * the info structure. |
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| 56 | */ |
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| 57 | ipc_answer_fast(iid, EINVAL, 0, 0); |
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| 58 | ipc_answer_fast(callid, EINVAL, 0, 0); |
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| 59 | return; |
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| 60 | } |
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| 61 | /* |
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| 62 | * XXX: continue here |
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| 63 | * Allocate an info structue, answer the call, check sanity |
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| 64 | * of the copied-in info structure, ... |
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| 65 | */ |
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| 66 | } else { |
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| 67 | /* |
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| 68 | * The client doesn't obey the same protocol as we do. |
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| 69 | */ |
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| 70 | ipc_answer_fast(iid, EINVAL, 0, 0); |
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| 71 | ipc_answer_fast(callid, EINVAL, 0, 0); |
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| 72 | return; |
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| 73 | } |
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| 74 | } |
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| 75 | |||
| 2520 | jermar | 76 | static void vfs_connection(ipc_callid_t iid, ipc_call_t *icall) |
| 77 | { |
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| 78 | ipcarg_t iarg1, iarg2; |
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| 79 | |||
| 80 | /* |
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| 81 | * The connection was opened via the IPC_CONNECT_ME_TO call. |
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| 82 | * This call needs to be answered. |
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| 83 | * |
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| 84 | * The protocol is that the requested action is specified in ARG1 |
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| 85 | * of the opening call. If the request has a single integer argument, |
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| 86 | * it is passed in ARG2. |
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| 87 | */ |
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| 88 | iarg1 = IPC_GET_ARG1(*icall); |
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| 89 | iarg2 = IPC_GET_ARG2(*icall); |
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| 90 | |||
| 91 | /* |
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| 92 | * Now, the connection can either be from an individual FS, |
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| 93 | * which is trying to register itself and pass us its capabilities. |
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| 94 | * Or, the connection is a regular connection from a client that wants |
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| 95 | * us to do something for it (e.g. open a file, mount a fs etc.). |
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| 96 | */ |
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| 97 | switch (iarg1) { |
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| 98 | case VFS_REGISTER: |
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| 2521 | jermar | 99 | vfs_register(iid, icall); |
| 100 | break; |
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| 2520 | jermar | 101 | case VFS_MOUNT: |
| 102 | case VFS_UNMOUNT: |
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| 103 | case VFS_OPEN: |
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| 104 | default: |
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| 105 | ipc_answer_fast(iid, ENOTSUP, 0, 0); |
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| 106 | break; |
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| 107 | } |
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| 108 | } |
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| 109 | |||
| 2518 | jermar | 110 | int main(int argc, char **argv) |
| 111 | { |
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| 2520 | jermar | 112 | ipcarg_t phonead; |
| 113 | |||
| 114 | async_set_client_connection(vfs_connection); |
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| 115 | ipc_connect_to_me(PHONE_NS, SERVICE_VFS, 0, &phonead); |
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| 116 | async_manager(); |
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| 2518 | jermar | 117 | return 0; |
| 118 | } |
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| 119 | |||
| 120 | /** |
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| 121 | * @} |
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| 122 | */ |