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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 multiplexer for HelenOS. |
35 | * @brief VFS multiplexer 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 "vfs.h" |
42 | #include "vfs.h" |
43 | 43 | ||
- | 44 | static void vfs_register(ipc_callid_t iid, ipc_call_t *icall) |
|
- | 45 | { |
|
- | 46 | ipc_callid_t callid; |
|
- | 47 | ipc_call_t call; |
|
- | 48 | ||
- | 49 | callid = async_get_call(&call); |
|
- | 50 | if (IPC_GET_METHOD(call) == IPC_M_DATA_SEND) { |
|
- | 51 | size_t size = IPC_GET_ARG3(call); |
|
- | 52 | if (size != sizeof(vfs_info_t)) { |
|
- | 53 | /* |
|
- | 54 | * The client is sending us something, which cannot be |
|
- | 55 | * the info structure. |
|
- | 56 | */ |
|
- | 57 | ipc_answer_fast(iid, EINVAL, 0, 0); |
|
- | 58 | ipc_answer_fast(callid, EINVAL, 0, 0); |
|
- | 59 | return; |
|
- | 60 | } |
|
- | 61 | /* |
|
- | 62 | * XXX: continue here |
|
- | 63 | * Allocate an info structue, answer the call, check sanity |
|
- | 64 | * of the copied-in info structure, ... |
|
- | 65 | */ |
|
- | 66 | } else { |
|
- | 67 | /* |
|
- | 68 | * The client doesn't obey the same protocol as we do. |
|
- | 69 | */ |
|
- | 70 | ipc_answer_fast(iid, EINVAL, 0, 0); |
|
- | 71 | ipc_answer_fast(callid, EINVAL, 0, 0); |
|
- | 72 | return; |
|
- | 73 | } |
|
- | 74 | } |
|
- | 75 | ||
44 | static void vfs_connection(ipc_callid_t iid, ipc_call_t *icall) |
76 | static void vfs_connection(ipc_callid_t iid, ipc_call_t *icall) |
45 | { |
77 | { |
46 | ipcarg_t iarg1, iarg2; |
78 | ipcarg_t iarg1, iarg2; |
47 | 79 | ||
48 | /* |
80 | /* |
49 | * The connection was opened via the IPC_CONNECT_ME_TO call. |
81 | * The connection was opened via the IPC_CONNECT_ME_TO call. |
50 | * This call needs to be answered. |
82 | * This call needs to be answered. |
51 | * |
83 | * |
52 | * The protocol is that the requested action is specified in ARG1 |
84 | * The protocol is that the requested action is specified in ARG1 |
53 | * of the opening call. If the request has a single integer argument, |
85 | * of the opening call. If the request has a single integer argument, |
54 | * it is passed in ARG2. |
86 | * it is passed in ARG2. |
55 | */ |
87 | */ |
56 | iarg1 = IPC_GET_ARG1(*icall); |
88 | iarg1 = IPC_GET_ARG1(*icall); |
57 | iarg2 = IPC_GET_ARG2(*icall); |
89 | iarg2 = IPC_GET_ARG2(*icall); |
58 | 90 | ||
59 | /* |
91 | /* |
60 | * Now, the connection can either be from an individual FS, |
92 | * Now, the connection can either be from an individual FS, |
61 | * which is trying to register itself and pass us its capabilities. |
93 | * which is trying to register itself and pass us its capabilities. |
62 | * Or, the connection is a regular connection from a client that wants |
94 | * Or, the connection is a regular connection from a client that wants |
63 | * us to do something for it (e.g. open a file, mount a fs etc.). |
95 | * us to do something for it (e.g. open a file, mount a fs etc.). |
64 | */ |
96 | */ |
65 | switch (iarg1) { |
97 | switch (iarg1) { |
66 | case VFS_REGISTER: |
98 | case VFS_REGISTER: |
- | 99 | vfs_register(iid, icall); |
|
- | 100 | break; |
|
67 | case VFS_MOUNT: |
101 | case VFS_MOUNT: |
68 | case VFS_UNMOUNT: |
102 | case VFS_UNMOUNT: |
69 | case VFS_OPEN: |
103 | case VFS_OPEN: |
70 | default: |
104 | default: |
71 | ipc_answer_fast(iid, ENOTSUP, 0, 0); |
105 | ipc_answer_fast(iid, ENOTSUP, 0, 0); |
72 | break; |
106 | break; |
73 | } |
107 | } |
74 | } |
108 | } |
75 | 109 | ||
76 | int main(int argc, char **argv) |
110 | int main(int argc, char **argv) |
77 | { |
111 | { |
78 | ipcarg_t phonead; |
112 | ipcarg_t phonead; |
79 | 113 | ||
80 | async_set_client_connection(vfs_connection); |
114 | async_set_client_connection(vfs_connection); |
81 | ipc_connect_to_me(PHONE_NS, SERVICE_VFS, 0, &phonead); |
115 | ipc_connect_to_me(PHONE_NS, SERVICE_VFS, 0, &phonead); |
82 | async_manager(); |
116 | async_manager(); |
83 | return 0; |
117 | return 0; |
84 | } |
118 | } |
85 | 119 | ||
86 | /** |
120 | /** |
87 | * @} |
121 | * @} |
88 | */ |
122 | */ |
89 | 123 |