Rev 2532 | Rev 2534 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
2006 | decky | 1 | /* |
2071 | jermar | 2 | * Copyright (c) 2006 Martin Decky |
2529 | jermar | 3 | * Copyright (c) 2007 Jakub Jermar |
2006 | decky | 4 | * All rights reserved. |
5 | * |
||
6 | * Redistribution and use in source and binary forms, with or without |
||
7 | * modification, are permitted provided that the following conditions |
||
8 | * are met: |
||
9 | * |
||
10 | * - Redistributions of source code must retain the above copyright |
||
11 | * notice, this list of conditions and the following disclaimer. |
||
12 | * - Redistributions in binary form must reproduce the above copyright |
||
13 | * notice, this list of conditions and the following disclaimer in the |
||
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 |
||
16 | * derived from this software without specific prior written permission. |
||
17 | * |
||
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 |
||
20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
||
21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
||
22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
||
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 |
||
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 |
||
27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
||
28 | */ |
||
29 | |||
30 | /** @addtogroup fs |
||
31 | * @{ |
||
32 | */ |
||
33 | |||
34 | /** |
||
2529 | jermar | 35 | * @file fat.c |
36 | * @brief FAT file system driver for HelenOS. |
||
2006 | decky | 37 | */ |
38 | |||
2529 | jermar | 39 | #include <ipc/ipc.h> |
40 | #include <ipc/services.h> |
||
2531 | jermar | 41 | #include <async.h> |
2529 | jermar | 42 | #include <errno.h> |
43 | #include <unistd.h> |
||
2532 | jermar | 44 | #include <stdio.h>> |
2529 | jermar | 45 | #include "../../vfs/vfs.h" |
2006 | decky | 46 | |
2532 | jermar | 47 | #define dprintf(...) printf(__VA_ARGS__) |
48 | |||
2529 | jermar | 49 | vfs_info_t fat_vfs_info = { |
50 | .name = "fat", |
||
51 | .ops = { |
||
52 | [IPC_METHOD_TO_VFS_OP(VFS_REGISTER)] = 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, |
||
55 | [IPC_METHOD_TO_VFS_OP(VFS_LOOKUP)] = 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, |
||
58 | [IPC_METHOD_TO_VFS_OP(VFS_CLOSE)] = 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, |
||
61 | [IPC_METHOD_TO_VFS_OP(VFS_SEEK)] = VFS_OP_DEFAULT |
||
62 | } |
||
63 | }; |
||
64 | |||
2531 | jermar | 65 | /* |
66 | * This fibril processes request from the VFS server. |
||
67 | */ |
||
68 | void fat_connection(ipc_callid_t iid, ipc_call_t *icall) |
||
69 | { |
||
2532 | jermar | 70 | dprintf("Callback connection established.\n"); |
2531 | jermar | 71 | while (1) { |
72 | ipc_callid_t callid; |
||
73 | ipc_call_t call; |
||
74 | |||
75 | callid = async_get_call(&call); |
||
76 | ipc_answer_fast(callid, ENOTSUP, 0, 0); |
||
77 | } |
||
78 | } |
||
79 | |||
2006 | decky | 80 | int main(int argc, char **argv) |
81 | { |
||
2532 | jermar | 82 | int vfs_phone; |
2529 | jermar | 83 | |
2532 | jermar | 84 | printf("FAT: HelenOS FAT file system server.\n"); |
85 | |||
2529 | jermar | 86 | vfs_phone = ipc_connect_me_to(PHONE_NS, SERVICE_VFS, 0); |
2532 | jermar | 87 | while (vfs_phone < EOK) { |
2529 | jermar | 88 | usleep(10000); |
89 | vfs_phone = ipc_connect_me_to(PHONE_NS, SERVICE_VFS, 0); |
||
90 | } |
||
91 | |||
2531 | jermar | 92 | /* |
93 | * Tell VFS that we are here and want to get registered. |
||
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. |
||
96 | */ |
||
97 | ipc_call_t answer; |
||
98 | aid_t req = async_send_2(vfs_phone, VFS_REGISTER, 0, 0, &answer); |
||
2529 | jermar | 99 | |
2531 | jermar | 100 | /* |
101 | * Send our VFS info structure to VFS. |
||
102 | */ |
||
103 | int rc = ipc_data_send(vfs_phone, &fat_vfs_info, sizeof(fat_vfs_info)); |
||
104 | if (rc != EOK) { |
||
105 | async_wait_for(req, NULL); |
||
106 | return rc; |
||
107 | } |
||
108 | |||
109 | /* |
||
110 | * Ask VFS for callback connection. |
||
111 | */ |
||
112 | ipcarg_t phonehash; |
||
113 | ipc_connect_to_me(vfs_phone, 0, 0, &phonehash); |
||
114 | |||
115 | async_new_connection(phonehash, 0, NULL, fat_connection); |
||
2532 | jermar | 116 | |
117 | /* |
||
118 | * Pick up the answer for the request to the VFS_REQUEST call. |
||
119 | */ |
||
120 | async_wait_for(req, NULL); |
||
121 | dprintf("FAT filesystem registered.\n"); |
||
2533 | jermar | 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) |
||
129 | usleep(1000000); |
||
130 | |||
2006 | decky | 131 | return 0; |
132 | } |
||
133 | |||
134 | /** |
||
135 | * @} |
||
136 | */ |