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| Rev | Author | Line No. | Line |
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| 2518 | jermar | 1 | /* |
| 2693 | jermar | 2 | * Copyright (c) 2008 Jakub Jermar |
| 2518 | jermar | 3 | * All rights reserved. |
| 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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| 4010 | decky | 31 | */ |
| 2518 | jermar | 32 | |
| 33 | /** |
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| 4010 | decky | 34 | * @file vfs.c |
| 35 | * @brief VFS service for HelenOS. |
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| 2518 | jermar | 36 | */ |
| 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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| 2532 | jermar | 42 | #include <stdio.h> |
| 2523 | jermar | 43 | #include <bool.h> |
| 2542 | jermar | 44 | #include <string.h> |
| 45 | #include <as.h> |
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| 2552 | jermar | 46 | #include <atomic.h> |
| 2520 | jermar | 47 | #include "vfs.h" |
| 48 | |||
| 3079 | decky | 49 | #define NAME "vfs" |
| 50 | |||
| 2520 | jermar | 51 | static void vfs_connection(ipc_callid_t iid, ipc_call_t *icall) |
| 52 | { |
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| 4010 | decky | 53 | bool keep_on_going = true; |
| 4406 | jermar | 54 | |
| 2520 | jermar | 55 | /* |
| 56 | * The connection was opened via the IPC_CONNECT_ME_TO call. |
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| 57 | * This call needs to be answered. |
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| 58 | */ |
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| 2619 | jermar | 59 | ipc_answer_0(iid, EOK); |
| 4010 | decky | 60 | |
| 2520 | jermar | 61 | /* |
| 2523 | jermar | 62 | * Here we enter the main connection fibril loop. |
| 63 | * The logic behind this loop and the protocol is that we'd like to keep |
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| 2560 | jermar | 64 | * each connection open until the client hangs up. When the client hangs |
| 65 | * up, we will free its VFS state. The act of hanging up the connection |
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| 66 | * by the client is equivalent to client termination because we cannot |
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| 67 | * distinguish one from the other. On the other hand, the client can |
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| 68 | * hang up arbitrarily if it has no open files and reestablish the |
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| 69 | * connection later. |
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| 2520 | jermar | 70 | */ |
| 2523 | jermar | 71 | while (keep_on_going) { |
| 72 | ipc_call_t call; |
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| 4010 | decky | 73 | ipc_callid_t callid = async_get_call(&call); |
| 74 | |||
| 75 | fs_handle_t fs_handle; |
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| 3849 | jermar | 76 | int phone; |
| 4010 | decky | 77 | |
| 2523 | jermar | 78 | switch (IPC_GET_METHOD(call)) { |
| 79 | case IPC_M_PHONE_HUNGUP: |
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| 80 | keep_on_going = false; |
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| 81 | break; |
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| 82 | case VFS_REGISTER: |
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| 83 | vfs_register(callid, &call); |
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| 4563 | jermar | 84 | keep_on_going = false; |
| 2523 | jermar | 85 | break; |
| 86 | case VFS_MOUNT: |
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| 2589 | jermar | 87 | vfs_mount(callid, &call); |
| 88 | break; |
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| 89 | case VFS_OPEN: |
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| 90 | vfs_open(callid, &call); |
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| 91 | break; |
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| 4463 | decky | 92 | case VFS_OPEN_NODE: |
| 93 | vfs_open_node(callid, &call); |
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| 94 | break; |
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| 2734 | jermar | 95 | case VFS_CLOSE: |
| 96 | vfs_close(callid, &call); |
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| 97 | break; |
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| 2625 | jermar | 98 | case VFS_READ: |
| 99 | vfs_read(callid, &call); |
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| 100 | break; |
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| 2666 | jermar | 101 | case VFS_WRITE: |
| 102 | vfs_write(callid, &call); |
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| 103 | break; |
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| 2684 | jermar | 104 | case VFS_SEEK: |
| 105 | vfs_seek(callid, &call); |
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| 106 | break; |
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| 2690 | jermar | 107 | case VFS_TRUNCATE: |
| 2693 | jermar | 108 | vfs_truncate(callid, &call); |
| 109 | break; |
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| 2707 | jermar | 110 | case VFS_MKDIR: |
| 111 | vfs_mkdir(callid, &call); |
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| 112 | break; |
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| 2735 | jermar | 113 | case VFS_UNLINK: |
| 114 | vfs_unlink(callid, &call); |
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| 115 | break; |
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| 2763 | jermar | 116 | case VFS_RENAME: |
| 117 | vfs_rename(callid, &call); |
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| 118 | break; |
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| 4463 | decky | 119 | case VFS_DEVICE: |
| 120 | vfs_device(callid, &call); |
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| 121 | break; |
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| 122 | case VFS_SYNC: |
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| 123 | vfs_sync(callid, &call); |
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| 124 | break; |
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| 125 | case VFS_NODE: |
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| 126 | vfs_node(callid, &call); |
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| 127 | break; |
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| 2523 | jermar | 128 | default: |
| 2619 | jermar | 129 | ipc_answer_0(callid, ENOTSUP); |
| 2523 | jermar | 130 | break; |
| 131 | } |
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| 2520 | jermar | 132 | } |
| 4010 | decky | 133 | |
| 2523 | jermar | 134 | /* TODO: cleanup after the client */ |
| 2520 | jermar | 135 | } |
| 136 | |||
| 2518 | jermar | 137 | int main(int argc, char **argv) |
| 138 | { |
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| 3079 | decky | 139 | printf(NAME ": HelenOS VFS server\n"); |
| 4010 | decky | 140 | |
| 2542 | jermar | 141 | /* |
| 2596 | jermar | 142 | * Initialize VFS node hash table. |
| 143 | */ |
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| 144 | if (!vfs_nodes_init()) { |
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| 3079 | decky | 145 | printf(NAME ": Failed to initialize VFS node hash table\n"); |
| 2596 | jermar | 146 | return ENOMEM; |
| 147 | } |
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| 4010 | decky | 148 | |
| 2596 | jermar | 149 | /* |
| 2542 | jermar | 150 | * Allocate and initialize the Path Lookup Buffer. |
| 151 | */ |
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| 152 | plb = as_get_mappable_page(PLB_SIZE); |
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| 2543 | jermar | 153 | if (!plb) { |
| 3079 | decky | 154 | printf(NAME ": Cannot allocate a mappable piece of address space\n"); |
| 2543 | jermar | 155 | return ENOMEM; |
| 156 | } |
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| 4010 | decky | 157 | |
| 2543 | jermar | 158 | if (as_area_create(plb, PLB_SIZE, AS_AREA_READ | AS_AREA_WRITE | |
| 159 | AS_AREA_CACHEABLE) != plb) { |
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| 3079 | decky | 160 | printf(NAME ": Cannot create address space area\n"); |
| 2543 | jermar | 161 | return ENOMEM; |
| 162 | } |
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| 163 | memset(plb, 0, PLB_SIZE); |
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| 2542 | jermar | 164 | |
| 165 | /* |
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| 4539 | jermar | 166 | * Set a connection handling function/fibril. |
| 2542 | jermar | 167 | */ |
| 2520 | jermar | 168 | async_set_client_connection(vfs_connection); |
| 4539 | jermar | 169 | |
| 170 | /* |
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| 2542 | jermar | 171 | * Register at the naming service. |
| 172 | */ |
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| 4010 | decky | 173 | ipcarg_t phonead; |
| 2637 | cejka | 174 | ipc_connect_to_me(PHONE_NS, SERVICE_VFS, 0, 0, &phonead); |
| 4010 | decky | 175 | |
| 2542 | jermar | 176 | /* |
| 177 | * Start accepting connections. |
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| 178 | */ |
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| 3079 | decky | 179 | printf(NAME ": Accepting connections\n"); |
| 2520 | jermar | 180 | async_manager(); |
| 2518 | jermar | 181 | return 0; |
| 182 | } |
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| 183 | |||
| 184 | /** |
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| 185 | * @} |
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| 4010 | decky | 186 | */ |