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1027 | palkovsky | 1 | /* |
2 | * Copyright (C) 2006 Ondrej Palkovsky |
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3 | * All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * |
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9 | * - Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * - Redistributions in binary form must reproduce the above copyright |
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12 | * notice, this list of conditions and the following disclaimer in the |
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13 | * documentation and/or other materials provided with the distribution. |
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14 | * - The name of the author may not be used to endorse or promote products |
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15 | * derived from this software without specific prior written permission. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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27 | */ |
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28 | |||
29 | #include <arch.h> |
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30 | #include <proc/task.h> |
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1288 | jermar | 31 | #include <proc/thread.h> |
1027 | palkovsky | 32 | #include <errno.h> |
33 | #include <memstr.h> |
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34 | #include <debug.h> |
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35 | #include <ipc/ipc.h> |
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36 | #include <ipc/sysipc.h> |
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1281 | palkovsky | 37 | #include <ipc/irq.h> |
1072 | palkovsky | 38 | #include <ipc/ipcrsc.h> |
1258 | palkovsky | 39 | #include <arch/interrupt.h> |
1027 | palkovsky | 40 | #include <print.h> |
1288 | jermar | 41 | #include <syscall/copy.h> |
1297 | jermar | 42 | #include <security/cap.h> |
1329 | palkovsky | 43 | #include <mm/as.h> |
1027 | palkovsky | 44 | |
1084 | palkovsky | 45 | #define GET_CHECK_PHONE(phone,phoneid,err) { \ |
46 | if (phoneid > IPC_MAX_PHONES) { err; } \ |
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47 | phone = &TASK->phones[phoneid]; \ |
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48 | } |
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49 | |||
1090 | palkovsky | 50 | #define STRUCT_TO_USPACE(dst,src) copy_to_uspace(dst,src,sizeof(*(src))) |
1084 | palkovsky | 51 | |
1040 | palkovsky | 52 | /** Return true if the method is a system method */ |
53 | static inline int is_system_method(__native method) |
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54 | { |
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55 | if (method <= IPC_M_LAST_SYSTEM) |
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56 | return 1; |
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57 | return 0; |
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58 | } |
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59 | |||
60 | /** Return true if the message with this method is forwardable |
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61 | * |
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62 | * - some system messages may be forwarded, for some of them |
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63 | * it is useless |
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64 | */ |
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65 | static inline int is_forwardable(__native method) |
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66 | { |
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1428 | palkovsky | 67 | if (method == IPC_M_PHONE_HUNGUP || method == IPC_M_AS_AREA_SEND \ |
68 | || method == IPC_M_AS_AREA_RECV) |
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1086 | palkovsky | 69 | return 0; /* This message is meant only for the receiver */ |
1040 | palkovsky | 70 | return 1; |
71 | } |
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72 | |||
1027 | palkovsky | 73 | /****************************************************/ |
74 | /* Functions that preprocess answer before sending |
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75 | * it to the recepient |
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76 | */ |
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77 | |||
78 | /** Return true if the caller (ipc_answer) should save |
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1088 | palkovsky | 79 | * the old call contents for answer_preprocess |
1027 | palkovsky | 80 | */ |
1088 | palkovsky | 81 | static inline int answer_need_old(call_t *call) |
1027 | palkovsky | 82 | { |
1086 | palkovsky | 83 | if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME) |
1027 | palkovsky | 84 | return 1; |
1086 | palkovsky | 85 | if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_ME_TO) |
1060 | palkovsky | 86 | return 1; |
1359 | jermar | 87 | if (IPC_GET_METHOD(call->data) == IPC_M_AS_AREA_SEND) |
1329 | palkovsky | 88 | return 1; |
1428 | palkovsky | 89 | if (IPC_GET_METHOD(call->data) == IPC_M_AS_AREA_RECV) |
90 | return 1; |
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1027 | palkovsky | 91 | return 0; |
92 | } |
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93 | |||
1428 | palkovsky | 94 | /** Interpret process answer as control information |
95 | * |
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96 | * This function is called directly after sys_ipc_answer |
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97 | */ |
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1329 | palkovsky | 98 | static inline int answer_preprocess(call_t *answer, ipc_data_t *olddata) |
1027 | palkovsky | 99 | { |
100 | int phoneid; |
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101 | |||
1088 | palkovsky | 102 | if (IPC_GET_RETVAL(answer->data) == EHANGUP) { |
1141 | palkovsky | 103 | /* In case of forward, hangup the forwared phone, |
104 | * not the originator |
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105 | */ |
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106 | spinlock_lock(&answer->data.phone->lock); |
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107 | spinlock_lock(&TASK->answerbox.lock); |
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108 | if (answer->data.phone->callee) { |
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109 | list_remove(&answer->data.phone->list); |
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110 | answer->data.phone->callee = 0; |
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111 | } |
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112 | spinlock_unlock(&TASK->answerbox.lock); |
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113 | spinlock_unlock(&answer->data.phone->lock); |
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1088 | palkovsky | 114 | } |
115 | |||
116 | if (!olddata) |
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1329 | palkovsky | 117 | return 0; |
1088 | palkovsky | 118 | |
1086 | palkovsky | 119 | if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_TO_ME) { |
1040 | palkovsky | 120 | phoneid = IPC_GET_ARG3(*olddata); |
1027 | palkovsky | 121 | if (IPC_GET_RETVAL(answer->data)) { |
122 | /* The connection was not accepted */ |
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123 | phone_dealloc(phoneid); |
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1040 | palkovsky | 124 | } else { |
1090 | palkovsky | 125 | /* The connection was accepted */ |
1040 | palkovsky | 126 | phone_connect(phoneid,&answer->sender->answerbox); |
1090 | palkovsky | 127 | /* Set 'phone identification' as arg3 of response */ |
128 | IPC_SET_ARG3(answer->data, (__native)&TASK->phones[phoneid]); |
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1027 | palkovsky | 129 | } |
1086 | palkovsky | 130 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_ME_TO) { |
1060 | palkovsky | 131 | /* If the users accepted call, connect */ |
132 | if (!IPC_GET_RETVAL(answer->data)) { |
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133 | ipc_phone_connect((phone_t *)IPC_GET_ARG3(*olddata), |
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134 | &TASK->answerbox); |
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135 | } |
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1359 | jermar | 136 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_AS_AREA_SEND) { |
137 | if (!IPC_GET_RETVAL(answer->data)) { /* Accepted, handle as_area receipt */ |
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1413 | jermar | 138 | ipl_t ipl; |
139 | as_t *as; |
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140 | |||
141 | ipl = interrupts_disable(); |
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142 | spinlock_lock(&answer->sender->lock); |
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143 | as = answer->sender->as; |
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144 | spinlock_unlock(&answer->sender->lock); |
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145 | interrupts_restore(ipl); |
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146 | |||
1417 | jermar | 147 | return as_area_share(as, IPC_GET_ARG1(*olddata), IPC_GET_ARG2(*olddata), |
1428 | palkovsky | 148 | AS, IPC_GET_ARG1(answer->data), IPC_GET_ARG3(*olddata)); |
1329 | palkovsky | 149 | } |
1428 | palkovsky | 150 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_AS_AREA_RECV) { |
151 | if (!IPC_GET_RETVAL(answer->data)) { |
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152 | ipl_t ipl; |
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153 | as_t *as; |
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154 | |||
155 | ipl = interrupts_disable(); |
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156 | spinlock_lock(&answer->sender->lock); |
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157 | as = answer->sender->as; |
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158 | spinlock_unlock(&answer->sender->lock); |
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159 | interrupts_restore(ipl); |
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160 | |||
161 | return as_area_share(AS, IPC_GET_ARG1(answer->data), IPC_GET_ARG2(*olddata), |
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162 | as, IPC_GET_ARG1(*olddata), IPC_GET_ARG3(*olddata)); |
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163 | } |
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1027 | palkovsky | 164 | } |
1329 | palkovsky | 165 | return 0; |
1027 | palkovsky | 166 | } |
167 | |||
1090 | palkovsky | 168 | /** Called before the request is sent |
169 | * |
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170 | * @return 0 - no error, -1 - report error to user |
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171 | */ |
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172 | static int request_preprocess(call_t *call) |
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173 | { |
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174 | int newphid; |
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1329 | palkovsky | 175 | size_t size; |
1090 | palkovsky | 176 | |
177 | switch (IPC_GET_METHOD(call->data)) { |
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178 | case IPC_M_CONNECT_ME_TO: |
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179 | newphid = phone_alloc(); |
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180 | if (newphid < 0) |
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181 | return ELIMIT; |
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182 | /* Set arg3 for server */ |
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183 | IPC_SET_ARG3(call->data, (__native)&TASK->phones[newphid]); |
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184 | call->flags |= IPC_CALL_CONN_ME_TO; |
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185 | call->private = newphid; |
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186 | break; |
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1359 | jermar | 187 | case IPC_M_AS_AREA_SEND: |
1417 | jermar | 188 | size = as_get_size(IPC_GET_ARG1(call->data)); |
1329 | palkovsky | 189 | if (!size) { |
190 | return EPERM; |
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191 | } |
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1417 | jermar | 192 | IPC_SET_ARG2(call->data, size); |
1329 | palkovsky | 193 | break; |
1090 | palkovsky | 194 | default: |
195 | break; |
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196 | } |
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197 | return 0; |
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198 | } |
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199 | |||
1027 | palkovsky | 200 | /****************************************************/ |
201 | /* Functions called to process received call/answer |
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202 | * before passing to uspace |
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203 | */ |
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204 | |||
205 | /** Do basic kernel processing of received call answer */ |
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1090 | palkovsky | 206 | static void process_answer(call_t *call) |
1027 | palkovsky | 207 | { |
1088 | palkovsky | 208 | if (IPC_GET_RETVAL(call->data) == EHANGUP && \ |
209 | call->flags & IPC_CALL_FORWARDED) |
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210 | IPC_SET_RETVAL(call->data, EFORWARD); |
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1090 | palkovsky | 211 | |
212 | if (call->flags & IPC_CALL_CONN_ME_TO) { |
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213 | if (IPC_GET_RETVAL(call->data)) |
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214 | phone_dealloc(call->private); |
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215 | else |
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216 | IPC_SET_ARG3(call->data, call->private); |
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217 | } |
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1027 | palkovsky | 218 | } |
219 | |||
220 | /** Do basic kernel processing of received call request |
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221 | * |
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222 | * @return 0 - the call should be passed to userspace, 1 - ignore call |
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223 | */ |
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224 | static int process_request(answerbox_t *box,call_t *call) |
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225 | { |
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226 | int phoneid; |
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227 | |||
1086 | palkovsky | 228 | if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME) { |
1040 | palkovsky | 229 | phoneid = phone_alloc(); |
1027 | palkovsky | 230 | if (phoneid < 0) { /* Failed to allocate phone */ |
231 | IPC_SET_RETVAL(call->data, ELIMIT); |
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232 | ipc_answer(box,call); |
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233 | return -1; |
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234 | } |
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235 | IPC_SET_ARG3(call->data, phoneid); |
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236 | } |
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237 | return 0; |
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238 | } |
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239 | |||
240 | /** Send a call over IPC, wait for reply, return to user |
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241 | * |
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242 | * @return Call identification, returns -1 on fatal error, |
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243 | -2 on 'Too many async request, handle answers first |
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244 | */ |
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245 | __native sys_ipc_call_sync_fast(__native phoneid, __native method, |
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1086 | palkovsky | 246 | __native arg1, ipc_data_t *data) |
1027 | palkovsky | 247 | { |
248 | call_t call; |
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249 | phone_t *phone; |
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1090 | palkovsky | 250 | int res; |
1027 | palkovsky | 251 | |
1084 | palkovsky | 252 | GET_CHECK_PHONE(phone, phoneid, return ENOENT); |
1027 | palkovsky | 253 | |
1084 | palkovsky | 254 | ipc_call_static_init(&call); |
1027 | palkovsky | 255 | IPC_SET_METHOD(call.data, method); |
256 | IPC_SET_ARG1(call.data, arg1); |
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257 | |||
1090 | palkovsky | 258 | if (!(res=request_preprocess(&call))) { |
259 | ipc_call_sync(phone, &call); |
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260 | process_answer(&call); |
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261 | } else |
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262 | IPC_SET_RETVAL(call.data, res); |
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1086 | palkovsky | 263 | STRUCT_TO_USPACE(&data->args, &call.data.args); |
1027 | palkovsky | 264 | |
265 | return 0; |
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266 | } |
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267 | |||
268 | /** Synchronous IPC call allowing to send whole message */ |
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1086 | palkovsky | 269 | __native sys_ipc_call_sync(__native phoneid, ipc_data_t *question, |
270 | ipc_data_t *reply) |
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1027 | palkovsky | 271 | { |
272 | call_t call; |
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273 | phone_t *phone; |
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1090 | palkovsky | 274 | int res; |
1288 | jermar | 275 | int rc; |
1027 | palkovsky | 276 | |
1084 | palkovsky | 277 | ipc_call_static_init(&call); |
1288 | jermar | 278 | rc = copy_from_uspace(&call.data.args, &question->args, sizeof(call.data.args)); |
279 | if (rc != 0) |
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280 | return (__native) rc; |
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1040 | palkovsky | 281 | |
1084 | palkovsky | 282 | GET_CHECK_PHONE(phone, phoneid, return ENOENT); |
1072 | palkovsky | 283 | |
1090 | palkovsky | 284 | if (!(res=request_preprocess(&call))) { |
285 | ipc_call_sync(phone, &call); |
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286 | process_answer(&call); |
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287 | } else |
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288 | IPC_SET_RETVAL(call.data, res); |
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1027 | palkovsky | 289 | |
1288 | jermar | 290 | rc = STRUCT_TO_USPACE(&reply->args, &call.data.args); |
291 | if (rc != 0) |
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292 | return rc; |
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1027 | palkovsky | 293 | |
294 | return 0; |
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295 | } |
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296 | |||
297 | /** Check that the task did not exceed allowed limit |
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298 | * |
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299 | * @return 0 - Limit OK, -1 - limit exceeded |
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300 | */ |
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301 | static int check_call_limit(void) |
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302 | { |
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303 | if (atomic_preinc(&TASK->active_calls) > IPC_MAX_ASYNC_CALLS) { |
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304 | atomic_dec(&TASK->active_calls); |
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305 | return -1; |
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306 | } |
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307 | return 0; |
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308 | } |
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309 | |||
310 | /** Send an asynchronous call over ipc |
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311 | * |
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312 | * @return Call identification, returns -1 on fatal error, |
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313 | -2 on 'Too many async request, handle answers first |
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314 | */ |
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315 | __native sys_ipc_call_async_fast(__native phoneid, __native method, |
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316 | __native arg1, __native arg2) |
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317 | { |
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318 | call_t *call; |
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319 | phone_t *phone; |
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1090 | palkovsky | 320 | int res; |
1027 | palkovsky | 321 | |
322 | if (check_call_limit()) |
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323 | return IPC_CALLRET_TEMPORARY; |
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324 | |||
1090 | palkovsky | 325 | GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL); |
1072 | palkovsky | 326 | |
1258 | palkovsky | 327 | call = ipc_call_alloc(0); |
1027 | palkovsky | 328 | IPC_SET_METHOD(call->data, method); |
329 | IPC_SET_ARG1(call->data, arg1); |
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330 | IPC_SET_ARG2(call->data, arg2); |
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331 | |||
1090 | palkovsky | 332 | if (!(res=request_preprocess(call))) |
333 | ipc_call(phone, call); |
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334 | else |
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335 | ipc_backsend_err(phone, call, res); |
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1027 | palkovsky | 336 | |
337 | return (__native) call; |
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338 | } |
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339 | |||
340 | /** Synchronous IPC call allowing to send whole message |
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341 | * |
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342 | * @return The same as sys_ipc_call_async |
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343 | */ |
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1086 | palkovsky | 344 | __native sys_ipc_call_async(__native phoneid, ipc_data_t *data) |
1027 | palkovsky | 345 | { |
346 | call_t *call; |
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347 | phone_t *phone; |
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1090 | palkovsky | 348 | int res; |
1288 | jermar | 349 | int rc; |
1027 | palkovsky | 350 | |
1072 | palkovsky | 351 | if (check_call_limit()) |
352 | return IPC_CALLRET_TEMPORARY; |
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353 | |||
1090 | palkovsky | 354 | GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL); |
1027 | palkovsky | 355 | |
1258 | palkovsky | 356 | call = ipc_call_alloc(0); |
1288 | jermar | 357 | rc = copy_from_uspace(&call->data.args, &data->args, sizeof(call->data.args)); |
1293 | palkovsky | 358 | if (rc != 0) { |
359 | ipc_call_free(call); |
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1288 | jermar | 360 | return (__native) rc; |
1293 | palkovsky | 361 | } |
1090 | palkovsky | 362 | if (!(res=request_preprocess(call))) |
363 | ipc_call(phone, call); |
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364 | else |
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365 | ipc_backsend_err(phone, call, res); |
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1040 | palkovsky | 366 | |
1027 | palkovsky | 367 | return (__native) call; |
368 | } |
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369 | |||
1040 | palkovsky | 370 | /** Forward received call to another destination |
371 | * |
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372 | * The arg1 and arg2 are changed in the forwarded message |
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1060 | palkovsky | 373 | * |
374 | * Warning: If implementing non-fast version, make sure that |
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375 | * arg3 is not rewritten for certain system IPC |
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1040 | palkovsky | 376 | */ |
377 | __native sys_ipc_forward_fast(__native callid, __native phoneid, |
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378 | __native method, __native arg1) |
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379 | { |
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380 | call_t *call; |
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381 | phone_t *phone; |
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382 | |||
383 | call = get_call(callid); |
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384 | if (!call) |
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385 | return ENOENT; |
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386 | |||
1088 | palkovsky | 387 | call->flags |= IPC_CALL_FORWARDED; |
388 | |||
1084 | palkovsky | 389 | GET_CHECK_PHONE(phone, phoneid, { |
1040 | palkovsky | 390 | IPC_SET_RETVAL(call->data, EFORWARD); |
391 | ipc_answer(&TASK->answerbox, call); |
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392 | return ENOENT; |
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1084 | palkovsky | 393 | }); |
1040 | palkovsky | 394 | |
395 | if (!is_forwardable(IPC_GET_METHOD(call->data))) { |
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396 | IPC_SET_RETVAL(call->data, EFORWARD); |
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397 | ipc_answer(&TASK->answerbox, call); |
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398 | return EPERM; |
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399 | } |
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400 | |||
401 | /* Userspace is not allowed to change method of system methods |
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402 | * on forward, allow changing ARG1 and ARG2 by means of method and arg1 |
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403 | */ |
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404 | if (is_system_method(IPC_GET_METHOD(call->data))) { |
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1090 | palkovsky | 405 | if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME) |
406 | phone_dealloc(IPC_GET_ARG3(call->data)); |
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407 | |||
1040 | palkovsky | 408 | IPC_SET_ARG1(call->data, method); |
409 | IPC_SET_ARG2(call->data, arg1); |
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410 | } else { |
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411 | IPC_SET_METHOD(call->data, method); |
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412 | IPC_SET_ARG1(call->data, arg1); |
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413 | } |
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414 | |||
1088 | palkovsky | 415 | return ipc_forward(call, phone, &TASK->answerbox); |
1040 | palkovsky | 416 | } |
417 | |||
1027 | palkovsky | 418 | /** Send IPC answer */ |
419 | __native sys_ipc_answer_fast(__native callid, __native retval, |
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420 | __native arg1, __native arg2) |
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421 | { |
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422 | call_t *call; |
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1040 | palkovsky | 423 | ipc_data_t saved_data; |
1088 | palkovsky | 424 | int saveddata = 0; |
1329 | palkovsky | 425 | int rc; |
1027 | palkovsky | 426 | |
1346 | palkovsky | 427 | /* Do not answer notification callids */ |
428 | if (callid & IPC_CALLID_NOTIFICATION) |
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429 | return 0; |
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430 | |||
1040 | palkovsky | 431 | call = get_call(callid); |
432 | if (!call) |
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433 | return ENOENT; |
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1027 | palkovsky | 434 | |
1088 | palkovsky | 435 | if (answer_need_old(call)) { |
1040 | palkovsky | 436 | memcpy(&saved_data, &call->data, sizeof(call->data)); |
1088 | palkovsky | 437 | saveddata = 1; |
1027 | palkovsky | 438 | } |
439 | |||
440 | IPC_SET_RETVAL(call->data, retval); |
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441 | IPC_SET_ARG1(call->data, arg1); |
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442 | IPC_SET_ARG2(call->data, arg2); |
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1329 | palkovsky | 443 | rc = answer_preprocess(call, saveddata ? &saved_data : NULL); |
1040 | palkovsky | 444 | |
1027 | palkovsky | 445 | ipc_answer(&TASK->answerbox, call); |
1329 | palkovsky | 446 | return rc; |
1027 | palkovsky | 447 | } |
448 | |||
449 | /** Send IPC answer */ |
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1086 | palkovsky | 450 | __native sys_ipc_answer(__native callid, ipc_data_t *data) |
1027 | palkovsky | 451 | { |
452 | call_t *call; |
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1040 | palkovsky | 453 | ipc_data_t saved_data; |
1088 | palkovsky | 454 | int saveddata = 0; |
1288 | jermar | 455 | int rc; |
1027 | palkovsky | 456 | |
1346 | palkovsky | 457 | /* Do not answer notification callids */ |
458 | if (callid & IPC_CALLID_NOTIFICATION) |
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459 | return 0; |
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460 | |||
1040 | palkovsky | 461 | call = get_call(callid); |
462 | if (!call) |
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463 | return ENOENT; |
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1027 | palkovsky | 464 | |
1088 | palkovsky | 465 | if (answer_need_old(call)) { |
1040 | palkovsky | 466 | memcpy(&saved_data, &call->data, sizeof(call->data)); |
1088 | palkovsky | 467 | saveddata = 1; |
1027 | palkovsky | 468 | } |
1288 | jermar | 469 | rc = copy_from_uspace(&call->data.args, &data->args, |
1086 | palkovsky | 470 | sizeof(call->data.args)); |
1288 | jermar | 471 | if (rc != 0) |
472 | return rc; |
||
1027 | palkovsky | 473 | |
1329 | palkovsky | 474 | rc = answer_preprocess(call, saveddata ? &saved_data : NULL); |
1027 | palkovsky | 475 | |
476 | ipc_answer(&TASK->answerbox, call); |
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477 | |||
1329 | palkovsky | 478 | return rc; |
1027 | palkovsky | 479 | } |
480 | |||
1086 | palkovsky | 481 | /** Hang up the phone |
482 | * |
||
483 | */ |
||
484 | __native sys_ipc_hangup(int phoneid) |
||
485 | { |
||
486 | phone_t *phone; |
||
487 | |||
488 | GET_CHECK_PHONE(phone, phoneid, return ENOENT); |
||
489 | |||
490 | if (ipc_phone_hangup(phone)) |
||
491 | return -1; |
||
492 | |||
493 | return 0; |
||
494 | } |
||
495 | |||
1027 | palkovsky | 496 | /** Wait for incoming ipc call or answer |
497 | * |
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1086 | palkovsky | 498 | * @param calldata Pointer to buffer where the call/answer data is stored |
1364 | jermar | 499 | * @param usec Timeout. See waitq_sleep_timeout() for explanation. |
500 | * @param nonblocking See waitq_sleep_timeout() for explanation. |
||
501 | * |
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1027 | palkovsky | 502 | * @return Callid, if callid & 1, then the call is answer |
503 | */ |
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1364 | jermar | 504 | __native sys_ipc_wait_for_call(ipc_data_t *calldata, __u32 usec, int nonblocking) |
1027 | palkovsky | 505 | { |
506 | call_t *call; |
||
507 | |||
508 | restart: |
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1364 | jermar | 509 | call = ipc_wait_for_call(&TASK->answerbox, usec, nonblocking); |
1088 | palkovsky | 510 | if (!call) |
511 | return 0; |
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1027 | palkovsky | 512 | |
1258 | palkovsky | 513 | if (call->flags & IPC_CALL_NOTIF) { |
514 | ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC)); |
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515 | STRUCT_TO_USPACE(&calldata->args, &call->data.args); |
||
516 | ipc_call_free(call); |
||
517 | |||
518 | return ((__native)call) | IPC_CALLID_NOTIFICATION; |
||
519 | } |
||
520 | |||
1027 | palkovsky | 521 | if (call->flags & IPC_CALL_ANSWERED) { |
1090 | palkovsky | 522 | process_answer(call); |
1027 | palkovsky | 523 | |
1086 | palkovsky | 524 | ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC)); |
525 | |||
1027 | palkovsky | 526 | atomic_dec(&TASK->active_calls); |
1086 | palkovsky | 527 | |
528 | if (call->flags & IPC_CALL_DISCARD_ANSWER) { |
||
529 | ipc_call_free(call); |
||
530 | goto restart; |
||
531 | } |
||
532 | |||
533 | STRUCT_TO_USPACE(&calldata->args, &call->data.args); |
||
1027 | palkovsky | 534 | ipc_call_free(call); |
535 | |||
536 | return ((__native)call) | IPC_CALLID_ANSWERED; |
||
537 | } |
||
1086 | palkovsky | 538 | |
1027 | palkovsky | 539 | if (process_request(&TASK->answerbox, call)) |
540 | goto restart; |
||
1086 | palkovsky | 541 | |
1090 | palkovsky | 542 | /* Include phone address('id') of the caller in the request, |
543 | * copy whole call->data, not only call->data.args */ |
||
1396 | palkovsky | 544 | if (STRUCT_TO_USPACE(calldata, &call->data)) { |
545 | return 0; |
||
546 | } |
||
1027 | palkovsky | 547 | return (__native)call; |
548 | } |
||
1258 | palkovsky | 549 | |
550 | /** Connect irq handler to task */ |
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1281 | palkovsky | 551 | __native sys_ipc_register_irq(__native irq, irq_code_t *ucode) |
1258 | palkovsky | 552 | { |
1297 | jermar | 553 | if (!(cap_get(TASK) & CAP_IRQ_REG)) |
554 | return EPERM; |
||
555 | |||
1258 | palkovsky | 556 | if (irq >= IRQ_COUNT) |
1297 | jermar | 557 | return (__native) ELIMIT; |
1258 | palkovsky | 558 | |
559 | irq_ipc_bind_arch(irq); |
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1281 | palkovsky | 560 | |
561 | return ipc_irq_register(&TASK->answerbox, irq, ucode); |
||
1258 | palkovsky | 562 | } |
563 | |||
564 | /* Disconnect irq handler from task */ |
||
565 | __native sys_ipc_unregister_irq(__native irq) |
||
566 | { |
||
1297 | jermar | 567 | if (!(cap_get(TASK) & CAP_IRQ_REG)) |
568 | return EPERM; |
||
569 | |||
1258 | palkovsky | 570 | if (irq >= IRQ_COUNT) |
1297 | jermar | 571 | return (__native) ELIMIT; |
1258 | palkovsky | 572 | |
573 | ipc_irq_unregister(&TASK->answerbox, irq); |
||
574 | |||
575 | return 0; |
||
576 | } |