Rev 2569 | Rev 2589 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
2518 | jermar | 1 | /* |
2 | * Copyright (c) 2007 Jakub Jermar |
||
3 | * All rights reserved. |
||
4 | * |
||
5 | * Redistribution and use in source and binary forms, with or without |
||
6 | * modification, are permitted provided that the following conditions |
||
7 | * are met: |
||
8 | * |
||
9 | * - Redistributions of source code must retain the above copyright |
||
10 | * notice, this list of conditions and the following disclaimer. |
||
11 | * - Redistributions in binary form must reproduce the above copyright |
||
12 | * notice, this list of conditions and the following disclaimer in the |
||
13 | * documentation and/or other materials provided with the distribution. |
||
14 | * - The name of the author may not be used to endorse or promote products |
||
15 | * derived from this software without specific prior written permission. |
||
16 | * |
||
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
||
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
||
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
||
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
||
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
||
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
||
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
||
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
||
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
||
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
||
27 | */ |
||
28 | |||
29 | /** @addtogroup fs |
||
30 | * @{ |
||
31 | */ |
||
32 | |||
33 | /** |
||
34 | * @file vfs.c |
||
2542 | jermar | 35 | * @brief VFS service for HelenOS. |
2518 | jermar | 36 | */ |
37 | |||
2520 | jermar | 38 | #include <ipc/ipc.h> |
39 | #include <ipc/services.h> |
||
40 | #include <async.h> |
||
41 | #include <errno.h> |
||
2532 | jermar | 42 | #include <stdio.h> |
2523 | jermar | 43 | #include <bool.h> |
2542 | jermar | 44 | #include <string.h> |
45 | #include <as.h> |
||
2526 | jermar | 46 | #include <libadt/list.h> |
2552 | jermar | 47 | #include <atomic.h> |
2520 | jermar | 48 | #include "vfs.h" |
49 | |||
2532 | jermar | 50 | #define dprintf(...) printf(__VA_ARGS__) |
51 | |||
2520 | jermar | 52 | static void vfs_connection(ipc_callid_t iid, ipc_call_t *icall) |
53 | { |
||
2523 | jermar | 54 | bool keep_on_going = 1; |
2520 | jermar | 55 | |
2532 | jermar | 56 | printf("Connection opened from %p\n", icall->in_phone_hash); |
57 | |||
2520 | jermar | 58 | /* |
2560 | jermar | 59 | * Initialize the table of open files. |
60 | */ |
||
61 | if (!vfs_conn_open_files_init()) { |
||
2588 | jermar | 62 | ipc_answer_fast_0(iid, ENOMEM); |
2560 | jermar | 63 | return; |
64 | } |
||
65 | |||
66 | /* |
||
2520 | jermar | 67 | * The connection was opened via the IPC_CONNECT_ME_TO call. |
68 | * This call needs to be answered. |
||
69 | */ |
||
2588 | jermar | 70 | ipc_answer_fast_0(iid, EOK); |
2520 | jermar | 71 | |
72 | /* |
||
2523 | jermar | 73 | * Here we enter the main connection fibril loop. |
74 | * The logic behind this loop and the protocol is that we'd like to keep |
||
2560 | jermar | 75 | * each connection open until the client hangs up. When the client hangs |
76 | * up, we will free its VFS state. The act of hanging up the connection |
||
77 | * by the client is equivalent to client termination because we cannot |
||
78 | * distinguish one from the other. On the other hand, the client can |
||
79 | * hang up arbitrarily if it has no open files and reestablish the |
||
80 | * connection later. |
||
2520 | jermar | 81 | */ |
2523 | jermar | 82 | while (keep_on_going) { |
83 | ipc_callid_t callid; |
||
84 | ipc_call_t call; |
||
85 | |||
86 | callid = async_get_call(&call); |
||
2532 | jermar | 87 | |
88 | printf("Received call, method=%d\n", IPC_GET_METHOD(call)); |
||
2523 | jermar | 89 | |
90 | switch (IPC_GET_METHOD(call)) { |
||
91 | case IPC_M_PHONE_HUNGUP: |
||
92 | keep_on_going = false; |
||
93 | break; |
||
94 | case VFS_REGISTER: |
||
95 | vfs_register(callid, &call); |
||
2569 | jermar | 96 | keep_on_going = false; |
2523 | jermar | 97 | break; |
98 | case VFS_MOUNT: |
||
99 | case VFS_UNMOUNT: |
||
100 | case VFS_OPEN: |
||
101 | case VFS_CREATE: |
||
102 | case VFS_CLOSE: |
||
103 | case VFS_READ: |
||
104 | case VFS_WRITE: |
||
105 | case VFS_SEEK: |
||
106 | default: |
||
2588 | jermar | 107 | ipc_answer_fast_0(callid, ENOTSUP); |
2523 | jermar | 108 | break; |
109 | } |
||
2520 | jermar | 110 | } |
2523 | jermar | 111 | |
112 | /* TODO: cleanup after the client */ |
||
113 | |||
2520 | jermar | 114 | } |
115 | |||
2518 | jermar | 116 | int main(int argc, char **argv) |
117 | { |
||
2520 | jermar | 118 | ipcarg_t phonead; |
119 | |||
2532 | jermar | 120 | printf("VFS: HelenOS VFS server\n"); |
121 | |||
2542 | jermar | 122 | /* |
123 | * Initialize the list of registered file systems. |
||
124 | */ |
||
2526 | jermar | 125 | list_initialize(&fs_head); |
2542 | jermar | 126 | |
127 | /* |
||
128 | * Allocate and initialize the Path Lookup Buffer. |
||
129 | */ |
||
130 | list_initialize(&plb_head); |
||
131 | plb = as_get_mappable_page(PLB_SIZE); |
||
2543 | jermar | 132 | if (!plb) { |
133 | printf("Cannot allocate a mappable piece of address space\n"); |
||
134 | return ENOMEM; |
||
135 | } |
||
136 | if (as_area_create(plb, PLB_SIZE, AS_AREA_READ | AS_AREA_WRITE | |
||
137 | AS_AREA_CACHEABLE) != plb) { |
||
138 | printf("Cannot create address space area.\n"); |
||
139 | return ENOMEM; |
||
140 | } |
||
141 | memset(plb, 0, PLB_SIZE); |
||
2542 | jermar | 142 | |
143 | /* |
||
144 | * Set a connectio handling function/fibril. |
||
145 | */ |
||
2520 | jermar | 146 | async_set_client_connection(vfs_connection); |
2542 | jermar | 147 | |
148 | /* |
||
149 | * Register at the naming service. |
||
150 | */ |
||
2520 | jermar | 151 | ipc_connect_to_me(PHONE_NS, SERVICE_VFS, 0, &phonead); |
2542 | jermar | 152 | |
153 | /* |
||
154 | * Start accepting connections. |
||
155 | */ |
||
2520 | jermar | 156 | async_manager(); |
2518 | jermar | 157 | return 0; |
158 | } |
||
159 | |||
160 | /** |
||
161 | * @} |
||
162 | */ |