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1 | /* |
1 | /* |
2 | * Copyright (c) 2007 Jakub Jermar |
2 | * Copyright (c) 2007 Jakub Jermar |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
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 |
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. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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 |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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 |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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 |
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. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | /** @addtogroup fs |
29 | /** @addtogroup fs |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | 32 | ||
33 | /** |
33 | /** |
34 | * @file vfs.c |
34 | * @file vfs.c |
35 | * @brief VFS service for HelenOS. |
35 | * @brief VFS service for HelenOS. |
36 | */ |
36 | */ |
37 | 37 | ||
38 | #include <ipc/ipc.h> |
38 | #include <ipc/ipc.h> |
39 | #include <ipc/services.h> |
39 | #include <ipc/services.h> |
40 | #include <async.h> |
40 | #include <async.h> |
41 | #include <errno.h> |
41 | #include <errno.h> |
42 | #include <stdio.h> |
42 | #include <stdio.h> |
43 | #include <bool.h> |
43 | #include <bool.h> |
44 | #include <string.h> |
44 | #include <string.h> |
45 | #include <as.h> |
45 | #include <as.h> |
46 | #include <libadt/list.h> |
46 | #include <libadt/list.h> |
47 | #include <atomic.h> |
47 | #include <atomic.h> |
48 | #include "vfs.h" |
48 | #include "vfs.h" |
49 | 49 | ||
50 | #define dprintf(...) printf(__VA_ARGS__) |
50 | #define dprintf(...) printf(__VA_ARGS__) |
51 | 51 | ||
52 | static void vfs_connection(ipc_callid_t iid, ipc_call_t *icall) |
52 | static void vfs_connection(ipc_callid_t iid, ipc_call_t *icall) |
53 | { |
53 | { |
54 | bool keep_on_going = 1; |
54 | bool keep_on_going = 1; |
55 | 55 | ||
56 | printf("Connection opened from %p\n", icall->in_phone_hash); |
56 | printf("Connection opened from %p\n", icall->in_phone_hash); |
57 | 57 | ||
58 | /* |
58 | /* |
59 | * Initialize the table of open files. |
- | |
60 | */ |
- | |
61 | if (!vfs_conn_open_files_init()) { |
- | |
62 | ipc_answer_fast_0(iid, ENOMEM); |
- | |
63 | return; |
- | |
64 | } |
- | |
65 | - | ||
66 | /* |
- | |
67 | * The connection was opened via the IPC_CONNECT_ME_TO call. |
59 | * The connection was opened via the IPC_CONNECT_ME_TO call. |
68 | * This call needs to be answered. |
60 | * This call needs to be answered. |
69 | */ |
61 | */ |
70 | ipc_answer_fast_0(iid, EOK); |
62 | ipc_answer_fast_0(iid, EOK); |
71 | 63 | ||
72 | /* |
64 | /* |
73 | * Here we enter the main connection fibril loop. |
65 | * Here we enter the main connection fibril loop. |
74 | * The logic behind this loop and the protocol is that we'd like to keep |
66 | * The logic behind this loop and the protocol is that we'd like to keep |
75 | * each connection open until the client hangs up. When the client hangs |
67 | * 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 |
68 | * 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 |
69 | * by the client is equivalent to client termination because we cannot |
78 | * distinguish one from the other. On the other hand, the client can |
70 | * 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 |
71 | * hang up arbitrarily if it has no open files and reestablish the |
80 | * connection later. |
72 | * connection later. |
81 | */ |
73 | */ |
82 | while (keep_on_going) { |
74 | while (keep_on_going) { |
83 | ipc_callid_t callid; |
75 | ipc_callid_t callid; |
84 | ipc_call_t call; |
76 | ipc_call_t call; |
85 | 77 | ||
86 | callid = async_get_call(&call); |
78 | callid = async_get_call(&call); |
87 | 79 | ||
88 | printf("Received call, method=%d\n", IPC_GET_METHOD(call)); |
80 | printf("Received call, method=%d\n", IPC_GET_METHOD(call)); |
89 | 81 | ||
90 | switch (IPC_GET_METHOD(call)) { |
82 | switch (IPC_GET_METHOD(call)) { |
91 | case IPC_M_PHONE_HUNGUP: |
83 | case IPC_M_PHONE_HUNGUP: |
92 | keep_on_going = false; |
84 | keep_on_going = false; |
93 | break; |
85 | break; |
94 | case VFS_REGISTER: |
86 | case VFS_REGISTER: |
95 | vfs_register(callid, &call); |
87 | vfs_register(callid, &call); |
96 | keep_on_going = false; |
88 | keep_on_going = false; |
97 | break; |
89 | break; |
98 | case VFS_MOUNT: |
90 | case VFS_MOUNT: |
- | 91 | vfs_mount(callid, &call); |
|
99 | case VFS_UNMOUNT: |
92 | keep_on_going = false; |
- | 93 | break; |
|
100 | case VFS_OPEN: |
94 | case VFS_OPEN: |
- | 95 | vfs_open(callid, &call); |
|
- | 96 | break; |
|
- | 97 | case VFS_UNMOUNT: |
|
101 | case VFS_CREATE: |
98 | case VFS_CREATE: |
102 | case VFS_CLOSE: |
99 | case VFS_CLOSE: |
103 | case VFS_READ: |
100 | case VFS_READ: |
104 | case VFS_WRITE: |
101 | case VFS_WRITE: |
105 | case VFS_SEEK: |
102 | case VFS_SEEK: |
106 | default: |
103 | default: |
107 | ipc_answer_fast_0(callid, ENOTSUP); |
104 | ipc_answer_fast_0(callid, ENOTSUP); |
108 | break; |
105 | break; |
109 | } |
106 | } |
110 | } |
107 | } |
111 | 108 | ||
112 | /* TODO: cleanup after the client */ |
109 | /* TODO: cleanup after the client */ |
113 | 110 | ||
114 | } |
111 | } |
115 | 112 | ||
116 | int main(int argc, char **argv) |
113 | int main(int argc, char **argv) |
117 | { |
114 | { |
118 | ipcarg_t phonead; |
115 | ipcarg_t phonead; |
119 | 116 | ||
120 | printf("VFS: HelenOS VFS server\n"); |
117 | printf("VFS: HelenOS VFS server\n"); |
121 | 118 | ||
122 | /* |
119 | /* |
123 | * Initialize the list of registered file systems. |
120 | * Initialize the list of registered file systems. |
124 | */ |
121 | */ |
125 | list_initialize(&fs_head); |
122 | list_initialize(&fs_head); |
126 | 123 | ||
127 | /* |
124 | /* |
128 | * Allocate and initialize the Path Lookup Buffer. |
125 | * Allocate and initialize the Path Lookup Buffer. |
129 | */ |
126 | */ |
130 | list_initialize(&plb_head); |
127 | list_initialize(&plb_head); |
131 | plb = as_get_mappable_page(PLB_SIZE); |
128 | plb = as_get_mappable_page(PLB_SIZE); |
132 | if (!plb) { |
129 | if (!plb) { |
133 | printf("Cannot allocate a mappable piece of address space\n"); |
130 | printf("Cannot allocate a mappable piece of address space\n"); |
134 | return ENOMEM; |
131 | return ENOMEM; |
135 | } |
132 | } |
136 | if (as_area_create(plb, PLB_SIZE, AS_AREA_READ | AS_AREA_WRITE | |
133 | if (as_area_create(plb, PLB_SIZE, AS_AREA_READ | AS_AREA_WRITE | |
137 | AS_AREA_CACHEABLE) != plb) { |
134 | AS_AREA_CACHEABLE) != plb) { |
138 | printf("Cannot create address space area.\n"); |
135 | printf("Cannot create address space area.\n"); |
139 | return ENOMEM; |
136 | return ENOMEM; |
140 | } |
137 | } |
141 | memset(plb, 0, PLB_SIZE); |
138 | memset(plb, 0, PLB_SIZE); |
142 | 139 | ||
143 | /* |
140 | /* |
144 | * Set a connectio handling function/fibril. |
141 | * Set a connectio handling function/fibril. |
145 | */ |
142 | */ |
146 | async_set_client_connection(vfs_connection); |
143 | async_set_client_connection(vfs_connection); |
147 | 144 | ||
148 | /* |
145 | /* |
149 | * Register at the naming service. |
146 | * Register at the naming service. |
150 | */ |
147 | */ |
151 | ipc_connect_to_me(PHONE_NS, SERVICE_VFS, 0, &phonead); |
148 | ipc_connect_to_me(PHONE_NS, SERVICE_VFS, 0, &phonead); |
152 | 149 | ||
153 | /* |
150 | /* |
154 | * Start accepting connections. |
151 | * Start accepting connections. |
155 | */ |
152 | */ |
156 | async_manager(); |
153 | async_manager(); |
157 | return 0; |
154 | return 0; |
158 | } |
155 | } |
159 | 156 | ||
160 | /** |
157 | /** |
161 | * @} |
158 | * @} |
162 | */ |
159 | */ |
163 | 160 |