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1 | /* |
1 | /* |
2 | * Copyright (c) 2006 Martin Decky |
2 | * Copyright (c) 2006 Martin Decky |
3 | * Copyright (c) 2007 Jakub Jermar |
3 | * Copyright (c) 2007 Jakub Jermar |
4 | * All rights reserved. |
4 | * All rights reserved. |
5 | * |
5 | * |
6 | * Redistribution and use in source and binary forms, with or without |
6 | * Redistribution and use in source and binary forms, with or without |
7 | * modification, are permitted provided that the following conditions |
7 | * modification, are permitted provided that the following conditions |
8 | * are met: |
8 | * are met: |
9 | * |
9 | * |
10 | * - Redistributions of source code must retain the above copyright |
10 | * - Redistributions of source code must retain the above copyright |
11 | * notice, this list of conditions and the following disclaimer. |
11 | * notice, this list of conditions and the following disclaimer. |
12 | * - Redistributions in binary form must reproduce the above copyright |
12 | * - Redistributions in binary form must reproduce the above copyright |
13 | * notice, this list of conditions and the following disclaimer in the |
13 | * notice, this list of conditions and the following disclaimer in the |
14 | * documentation and/or other materials provided with the distribution. |
14 | * documentation and/or other materials provided with the distribution. |
15 | * - The name of the author may not be used to endorse or promote products |
15 | * - The name of the author may not be used to endorse or promote products |
16 | * derived from this software without specific prior written permission. |
16 | * derived from this software without specific prior written permission. |
17 | * |
17 | * |
18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
28 | */ |
28 | */ |
29 | 29 | ||
30 | /** @addtogroup fs |
30 | /** @addtogroup fs |
31 | * @{ |
31 | * @{ |
32 | */ |
32 | */ |
33 | 33 | ||
34 | /** |
34 | /** |
35 | * @file fat.c |
35 | * @file fat.c |
36 | * @brief FAT file system driver for HelenOS. |
36 | * @brief FAT file system driver for HelenOS. |
37 | */ |
37 | */ |
38 | 38 | ||
39 | #include <ipc/ipc.h> |
39 | #include <ipc/ipc.h> |
40 | #include <ipc/services.h> |
40 | #include <ipc/services.h> |
41 | #include <async.h> |
41 | #include <async.h> |
42 | #include <errno.h> |
42 | #include <errno.h> |
43 | #include <unistd.h> |
43 | #include <unistd.h> |
44 | #include <stdio.h>> |
44 | #include <stdio.h>> |
45 | #include "../../vfs/vfs.h" |
45 | #include "../../vfs/vfs.h" |
46 | 46 | ||
47 | #define dprintf(...) printf(__VA_ARGS__) |
47 | #define dprintf(...) printf(__VA_ARGS__) |
48 | 48 | ||
49 | vfs_info_t fat_vfs_info = { |
49 | vfs_info_t fat_vfs_info = { |
50 | .name = "fat", |
50 | .name = "fat", |
51 | .ops = { |
51 | .ops = { |
52 | [IPC_METHOD_TO_VFS_OP(VFS_REGISTER)] = VFS_OP_DEFINED, |
52 | [IPC_METHOD_TO_VFS_OP(VFS_REGISTER)] = VFS_OP_DEFINED, |
53 | [IPC_METHOD_TO_VFS_OP(VFS_MOUNT)] = VFS_OP_DEFINED, |
53 | [IPC_METHOD_TO_VFS_OP(VFS_MOUNT)] = VFS_OP_DEFINED, |
54 | [IPC_METHOD_TO_VFS_OP(VFS_UNMOUNT)] = VFS_OP_DEFINED, |
54 | [IPC_METHOD_TO_VFS_OP(VFS_UNMOUNT)] = VFS_OP_DEFINED, |
55 | [IPC_METHOD_TO_VFS_OP(VFS_LOOKUP)] = VFS_OP_DEFINED, |
55 | [IPC_METHOD_TO_VFS_OP(VFS_LOOKUP)] = VFS_OP_DEFINED, |
56 | [IPC_METHOD_TO_VFS_OP(VFS_OPEN)] = VFS_OP_DEFINED, |
56 | [IPC_METHOD_TO_VFS_OP(VFS_OPEN)] = VFS_OP_DEFINED, |
57 | [IPC_METHOD_TO_VFS_OP(VFS_CREATE)] = VFS_OP_DEFINED, |
57 | [IPC_METHOD_TO_VFS_OP(VFS_CREATE)] = VFS_OP_DEFINED, |
58 | [IPC_METHOD_TO_VFS_OP(VFS_CLOSE)] = VFS_OP_DEFINED, |
58 | [IPC_METHOD_TO_VFS_OP(VFS_CLOSE)] = VFS_OP_DEFINED, |
59 | [IPC_METHOD_TO_VFS_OP(VFS_READ)] = VFS_OP_DEFINED, |
59 | [IPC_METHOD_TO_VFS_OP(VFS_READ)] = VFS_OP_DEFINED, |
60 | [IPC_METHOD_TO_VFS_OP(VFS_WRITE)] = VFS_OP_NULL, |
60 | [IPC_METHOD_TO_VFS_OP(VFS_WRITE)] = VFS_OP_NULL, |
61 | [IPC_METHOD_TO_VFS_OP(VFS_SEEK)] = VFS_OP_DEFAULT |
61 | [IPC_METHOD_TO_VFS_OP(VFS_SEEK)] = VFS_OP_DEFAULT |
62 | } |
62 | } |
63 | }; |
63 | }; |
64 | 64 | ||
65 | /* |
65 | /* |
66 | * This fibril processes request from the VFS server. |
66 | * This fibril processes request from the VFS server. |
67 | */ |
67 | */ |
68 | void fat_connection(ipc_callid_t iid, ipc_call_t *icall) |
68 | void fat_connection(ipc_callid_t iid, ipc_call_t *icall) |
69 | { |
69 | { |
70 | dprintf("Callback connection established.\n"); |
70 | dprintf("Callback connection established.\n"); |
71 | while (1) { |
71 | while (1) { |
72 | ipc_callid_t callid; |
72 | ipc_callid_t callid; |
73 | ipc_call_t call; |
73 | ipc_call_t call; |
74 | 74 | ||
75 | callid = async_get_call(&call); |
75 | callid = async_get_call(&call); |
76 | ipc_answer_fast(callid, ENOTSUP, 0, 0); |
76 | ipc_answer_fast(callid, ENOTSUP, 0, 0); |
77 | } |
77 | } |
78 | } |
78 | } |
79 | 79 | ||
80 | int main(int argc, char **argv) |
80 | int main(int argc, char **argv) |
81 | { |
81 | { |
82 | int vfs_phone; |
82 | int vfs_phone; |
83 | 83 | ||
84 | printf("FAT: HelenOS FAT file system server.\n"); |
84 | printf("FAT: HelenOS FAT file system server.\n"); |
85 | 85 | ||
86 | vfs_phone = ipc_connect_me_to(PHONE_NS, SERVICE_VFS, 0); |
86 | vfs_phone = ipc_connect_me_to(PHONE_NS, SERVICE_VFS, 0); |
87 | while (vfs_phone < EOK) { |
87 | while (vfs_phone < EOK) { |
88 | usleep(10000); |
88 | usleep(10000); |
89 | vfs_phone = ipc_connect_me_to(PHONE_NS, SERVICE_VFS, 0); |
89 | vfs_phone = ipc_connect_me_to(PHONE_NS, SERVICE_VFS, 0); |
90 | } |
90 | } |
91 | 91 | ||
92 | /* |
92 | /* |
93 | * Tell VFS that we are here and want to get registered. |
93 | * Tell VFS that we are here and want to get registered. |
94 | * We use the async framework because VFS will answer the request |
94 | * We use the async framework because VFS will answer the request |
95 | * out-of-order, when it knows that the operation succeeded or failed. |
95 | * out-of-order, when it knows that the operation succeeded or failed. |
96 | */ |
96 | */ |
97 | ipc_call_t answer; |
97 | ipc_call_t answer; |
98 | aid_t req = async_send_2(vfs_phone, VFS_REGISTER, 0, 0, &answer); |
98 | aid_t req = async_send_2(vfs_phone, VFS_REGISTER, 0, 0, &answer); |
99 | 99 | ||
100 | /* |
100 | /* |
101 | * Send our VFS info structure to VFS. |
101 | * Send our VFS info structure to VFS. |
102 | */ |
102 | */ |
103 | int rc = ipc_data_send(vfs_phone, &fat_vfs_info, sizeof(fat_vfs_info)); |
103 | int rc = ipc_data_send(vfs_phone, &fat_vfs_info, sizeof(fat_vfs_info)); |
104 | if (rc != EOK) { |
104 | if (rc != EOK) { |
105 | async_wait_for(req, NULL); |
105 | async_wait_for(req, NULL); |
106 | return rc; |
106 | return rc; |
107 | } |
107 | } |
108 | 108 | ||
109 | /* |
109 | /* |
110 | * Ask VFS for callback connection. |
110 | * Ask VFS for callback connection. |
111 | */ |
111 | */ |
112 | ipcarg_t phonehash; |
112 | ipcarg_t phonehash; |
113 | ipc_connect_to_me(vfs_phone, 0, 0, &phonehash); |
113 | ipc_connect_to_me(vfs_phone, 0, 0, &phonehash); |
114 | 114 | ||
115 | async_new_connection(phonehash, 0, NULL, fat_connection); |
115 | async_new_connection(phonehash, 0, NULL, fat_connection); |
116 | 116 | ||
117 | /* |
117 | /* |
118 | * Pick up the answer for the request to the VFS_REQUEST call. |
118 | * Pick up the answer for the request to the VFS_REQUEST call. |
119 | */ |
119 | */ |
120 | async_wait_for(req, NULL); |
120 | async_wait_for(req, NULL); |
121 | dprintf("FAT filesystem registered.\n"); |
121 | dprintf("FAT filesystem registered.\n"); |
- | 122 | ||
- | 123 | /* |
|
- | 124 | * TODO: Interestingly, if we return, the only thread dies. |
|
- | 125 | * If the only thread dies, the whole task is destroyed. |
|
- | 126 | * Prevent the thread from exiting when there are active fibrils. |
|
- | 127 | */ |
|
- | 128 | while(1) |
|
122 | async_manager(); |
129 | usleep(1000000); |
- | 130 | ||
123 | return 0; |
131 | return 0; |
124 | } |
132 | } |
125 | 133 | ||
126 | /** |
134 | /** |
127 | * @} |
135 | * @} |
128 | */ |
136 | */ |
129 | 137 |