WebSVN – HelenOS-historic – Diff – /kernel/trunk/generic/src/ipc/sysipc.c


/*
 * Copyright (C) 2006 Ondrej Palkovsky
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
#include <arch.h>
#include <proc/task.h>
#include <proc/thread.h>
#include <errno.h>
#include <memstr.h>
#include <debug.h>
#include <ipc/ipc.h>
#include <ipc/sysipc.h>
#include <ipc/irq.h>
#include <ipc/ipcrsc.h>
#include <arch/interrupt.h>
#include <print.h>
#include <syscall/copy.h>
#include <security/cap.h>
#include <mm/as.h>
 
#define GET_CHECK_PHONE(phone,phoneid,err) { \
      if (phoneid > IPC_MAX_PHONES) { err; } \
      phone = &TASK->phones[phoneid]; \
}
 
#define STRUCT_TO_USPACE(dst,src) copy_to_uspace(dst,src,sizeof(*(src)))
 
/** Return true if the method is a system method */
static inline int is_system_method(__native method)
{
    if (method <= IPC_M_LAST_SYSTEM)
        return 1;
    return 0;
}
 
/** Return true if the message with this method is forwardable
 *
 * - some system messages may be forwarded, for some of them
 *   it is useless
 */
static inline int is_forwardable(__native method)
{
    if (method == IPC_M_PHONE_HUNGUP || method == IPC_M_AS_AREA_SEND \
        || method == IPC_M_AS_AREA_RECV)
        return 0; /* This message is meant only for the receiver */
    return 1;
}
 
/****************************************************/
/* Functions that preprocess answer before sending
 * it to the recepient
 */
 
/** Return true if the caller (ipc_answer) should save
 * the old call contents for answer_preprocess
 */
static inline int answer_need_old(call_t *call)
{
    if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME)
        return 1;
    if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_ME_TO)
        return 1;
    if (IPC_GET_METHOD(call->data) == IPC_M_AS_AREA_SEND)
        return 1;
    if (IPC_GET_METHOD(call->data) == IPC_M_AS_AREA_RECV)
        return 1;
    return 0;
}
 
/** Interpret process answer as control information
 *
 * This function is called directly after sys_ipc_answer
 */
static inline int answer_preprocess(call_t *answer, ipc_data_t *olddata)
{
    int phoneid;
 
    if (IPC_GET_RETVAL(answer->data) == EHANGUP) {
        /* In case of forward, hangup the forwared phone,
         * not the originator
         */
        spinlock_lock(&answer->data.phone->lock);
        spinlock_lock(&TASK->answerbox.lock);
        if (answer->data.phone->callee) {
            list_remove(&answer->data.phone->list);
            answer->data.phone->callee = 0;
        }
        spinlock_unlock(&TASK->answerbox.lock);
        spinlock_unlock(&answer->data.phone->lock);
    }
 
    if (!olddata)
        return 0;
 
    if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_TO_ME) {
        phoneid = IPC_GET_ARG3(*olddata);
        if (IPC_GET_RETVAL(answer->data)) {
            /* The connection was not accepted */
            phone_dealloc(phoneid);
        } else {
            /* The connection was accepted */
            phone_connect(phoneid,&answer->sender->answerbox);
            /* Set 'phone identification' as arg3 of response */
            IPC_SET_ARG3(answer->data, (__native)&TASK->phones[phoneid]);
        }
    } else if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_ME_TO) {
        /* If the users accepted call, connect */
        if (!IPC_GET_RETVAL(answer->data)) {
            ipc_phone_connect((phone_t *)IPC_GET_ARG3(*olddata),
                      &TASK->answerbox);
        }
    } else if (IPC_GET_METHOD(*olddata) == IPC_M_AS_AREA_SEND) {
        if (!IPC_GET_RETVAL(answer->data)) { /* Accepted, handle as_area receipt */
            ipl_t ipl;
            as_t *as;
           
            ipl = interrupts_disable();
            spinlock_lock(&answer->sender->lock);
            as = answer->sender->as;
            spinlock_unlock(&answer->sender->lock);
            interrupts_restore(ipl);
           
            return as_area_share(as, IPC_GET_ARG1(*olddata), IPC_GET_ARG2(*olddata),
                         AS, IPC_GET_ARG1(answer->data), IPC_GET_ARG3(*olddata));
        }
    } else if (IPC_GET_METHOD(*olddata) == IPC_M_AS_AREA_RECV) {
        if (!IPC_GET_RETVAL(answer->data)) {
            ipl_t ipl;
            as_t *as;
           
            ipl = interrupts_disable();
            spinlock_lock(&answer->sender->lock);
            as = answer->sender->as;
            spinlock_unlock(&answer->sender->lock);
            interrupts_restore(ipl);
           
            return as_area_share(AS, IPC_GET_ARG1(answer->data), IPC_GET_ARG2(*olddata),
                         as, IPC_GET_ARG1(*olddata), IPC_GET_ARG3(*olddata));
        }
    }
    return 0;
}
 
/** Called before the request is sent
 *
 * @return 0 - no error, -1 - report error to user
 */
static int request_preprocess(call_t *call)
{
    int newphid;
    size_t size;
 
    switch (IPC_GET_METHOD(call->data)) {
    case IPC_M_CONNECT_ME_TO:
        newphid = phone_alloc();
        if (newphid < 0)
            return ELIMIT;
        /* Set arg3 for server */
        IPC_SET_ARG3(call->data, (__native)&TASK->phones[newphid]);
        call->flags |= IPC_CALL_CONN_ME_TO;
        call->private = newphid;
        break;
    case IPC_M_AS_AREA_SEND:
        size = as_get_size(IPC_GET_ARG1(call->data));
        if (!size) {
            return EPERM;
        }
        IPC_SET_ARG2(call->data, size);
        break;
    default:
        break;
    }
    return 0;
}
 
/****************************************************/
/* Functions called to process received call/answer
 * before passing to uspace
 */
 
/** Do basic kernel processing of received call answer */
static void process_answer(call_t *call)
{
    if (IPC_GET_RETVAL(call->data) == EHANGUP && \
        call->flags & IPC_CALL_FORWARDED)
        IPC_SET_RETVAL(call->data, EFORWARD);
 
    if (call->flags & IPC_CALL_CONN_ME_TO) {
        if (IPC_GET_RETVAL(call->data))
            phone_dealloc(call->private);
        else
            IPC_SET_ARG3(call->data, call->private);
    }
}
 
/** Do basic kernel processing of received call request
 *
 * @return 0 - the call should be passed to userspace, 1 - ignore call
 */
static int process_request(answerbox_t *box,call_t *call)
{
    int phoneid;
 
    if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME) {
        phoneid = phone_alloc();
        if (phoneid < 0) { /* Failed to allocate phone */
            IPC_SET_RETVAL(call->data, ELIMIT);
            ipc_answer(box,call);
            return -1;
        }
        IPC_SET_ARG3(call->data, phoneid);
    }
    return 0;
}
 
/** Send a call over IPC, wait for reply, return to user
 *
 * @return Call identification, returns -1 on fatal error,
           -2 on 'Too many async request, handle answers first
 */
__native sys_ipc_call_sync_fast(__native phoneid, __native method,
                __native arg1, ipc_data_t *data)
{
    call_t call;
    phone_t *phone;
    int res;
 
    GET_CHECK_PHONE(phone, phoneid, return ENOENT);
 
    ipc_call_static_init(&call);
    IPC_SET_METHOD(call.data, method);
    IPC_SET_ARG1(call.data, arg1);
 
    if (!(res=request_preprocess(&call))) {
        ipc_call_sync(phone, &call);
        process_answer(&call);
    } else
        IPC_SET_RETVAL(call.data, res);
    STRUCT_TO_USPACE(&data->args, &call.data.args);
 
    return 0;
}
 
/** Synchronous IPC call allowing to send whole message */
__native sys_ipc_call_sync(__native phoneid, ipc_data_t *question,
               ipc_data_t *reply)
{
    call_t call;
    phone_t *phone;
    int res;
    int rc;
 
    ipc_call_static_init(&call);
    rc = copy_from_uspace(&call.data.args, &question->args, sizeof(call.data.args));
    if (rc != 0)
        return (__native) rc;
 
    GET_CHECK_PHONE(phone, phoneid, return ENOENT);
 
    if (!(res=request_preprocess(&call))) {
        ipc_call_sync(phone, &call);
        process_answer(&call);
    } else
        IPC_SET_RETVAL(call.data, res);
 
    rc = STRUCT_TO_USPACE(&reply->args, &call.data.args);
    if (rc != 0)
        return rc;
 
    return 0;
}
 
/** Check that the task did not exceed allowed limit
 *
 * @return 0 - Limit OK,   -1 - limit exceeded
 */
static int check_call_limit(void)
{
    if (atomic_preinc(&TASK->active_calls) > IPC_MAX_ASYNC_CALLS) {
        atomic_dec(&TASK->active_calls);
        return -1;
    }
    return 0;
}
 
/** Send an asynchronous call over ipc
 *
 * @return Call identification, returns -1 on fatal error,
           -2 on 'Too many async request, handle answers first
 */
__native sys_ipc_call_async_fast(__native phoneid, __native method,
                 __native arg1, __native arg2)
{
    call_t *call;
    phone_t *phone;
    int res;
 
    if (check_call_limit())
        return IPC_CALLRET_TEMPORARY;
 
    GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL);
 
    call = ipc_call_alloc(0);
    IPC_SET_METHOD(call->data, method);
    IPC_SET_ARG1(call->data, arg1);
    IPC_SET_ARG2(call->data, arg2);
 
    if (!(res=request_preprocess(call)))
        ipc_call(phone, call);
    else
        ipc_backsend_err(phone, call, res);
 
    return (__native) call;
}
 
/** Synchronous IPC call allowing to send whole message
 *
 * @return The same as sys_ipc_call_async
 */
__native sys_ipc_call_async(__native phoneid, ipc_data_t *data)
{
    call_t *call;
    phone_t *phone;
    int res;
    int rc;
 
    if (check_call_limit())
        return IPC_CALLRET_TEMPORARY;
 
    GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL);
 
    call = ipc_call_alloc(0);
    rc = copy_from_uspace(&call->data.args, &data->args, sizeof(call->data.args));
    if (rc != 0) {
        ipc_call_free(call);
        return (__native) rc;
    }
    if (!(res=request_preprocess(call)))
        ipc_call(phone, call);
    else
        ipc_backsend_err(phone, call, res);
 
    return (__native) call;
}
 
/** Forward received call to another destination
 *
 * The arg1 and arg2 are changed in the forwarded message
 *
 * Warning: If implementing non-fast version, make sure that
 *          arg3 is not rewritten for certain system IPC
 */
__native sys_ipc_forward_fast(__native callid, __native phoneid,
                  __native method, __native arg1)
{
    call_t *call;
    phone_t *phone;
 
    call = get_call(callid);
    if (!call)
        return ENOENT;
 
    call->flags |= IPC_CALL_FORWARDED;
 
    GET_CHECK_PHONE(phone, phoneid, {
        IPC_SET_RETVAL(call->data, EFORWARD);
        ipc_answer(&TASK->answerbox, call);
        return ENOENT;
    });    
 
    if (!is_forwardable(IPC_GET_METHOD(call->data))) {
        IPC_SET_RETVAL(call->data, EFORWARD);
        ipc_answer(&TASK->answerbox, call);
        return EPERM;
    }
 
    /* Userspace is not allowed to change method of system methods
     * on forward, allow changing ARG1 and ARG2 by means of method and arg1
     */
    if (is_system_method(IPC_GET_METHOD(call->data))) {
        if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME)
            phone_dealloc(IPC_GET_ARG3(call->data));
 
        IPC_SET_ARG1(call->data, method);
        IPC_SET_ARG2(call->data, arg1);
    } else {
        IPC_SET_METHOD(call->data, method);
        IPC_SET_ARG1(call->data, arg1);
    }
 
    return ipc_forward(call, phone, &TASK->answerbox);
}
 
/** Send IPC answer */
__native sys_ipc_answer_fast(__native callid, __native retval,
                 __native arg1, __native arg2)
{
    call_t *call;
    ipc_data_t saved_data;
    int saveddata = 0;
    int rc;
 
    /* Do not answer notification callids */
    if (callid & IPC_CALLID_NOTIFICATION)
        return 0;
 
    call = get_call(callid);
    if (!call)
        return ENOENT;
 
    if (answer_need_old(call)) {
        memcpy(&saved_data, &call->data, sizeof(call->data));
        saveddata = 1;
    }
 
    IPC_SET_RETVAL(call->data, retval);
    IPC_SET_ARG1(call->data, arg1);
    IPC_SET_ARG2(call->data, arg2);
    rc = answer_preprocess(call, saveddata ? &saved_data : NULL);
 
    ipc_answer(&TASK->answerbox, call);
    return rc;
}
 
/** Send IPC answer */
__native sys_ipc_answer(__native callid, ipc_data_t *data)
{
    call_t *call;
    ipc_data_t saved_data;
    int saveddata = 0;
    int rc;
 
    /* Do not answer notification callids */
    if (callid & IPC_CALLID_NOTIFICATION)
        return 0;
 
    call = get_call(callid);
    if (!call)
        return ENOENT;
 
    if (answer_need_old(call)) {
        memcpy(&saved_data, &call->data, sizeof(call->data));
        saveddata = 1;
    }
    rc = copy_from_uspace(&call->data.args, &data->args,
             sizeof(call->data.args));
    if (rc != 0)
        return rc;
 
    rc = answer_preprocess(call, saveddata ? &saved_data : NULL);
   
    ipc_answer(&TASK->answerbox, call);
 
    return rc;
}
 
/** Hang up the phone
 *
 */
__native sys_ipc_hangup(int phoneid)
{
    phone_t *phone;
 
    GET_CHECK_PHONE(phone, phoneid, return ENOENT);
 
    if (ipc_phone_hangup(phone))
        return -1;
 
    return 0;
}
 
/** Wait for incoming ipc call or answer
 *
 * @param calldata Pointer to buffer where the call/answer data is stored
 * @param usec Timeout. See waitq_sleep_timeout() for explanation.
 * @param nonblocking See waitq_sleep_timeout() for explanation.
 *
 * @return Callid, if callid & 1, then the call is answer
 */
__native sys_ipc_wait_for_call(ipc_data_t *calldata, __u32 usec, int nonblocking)
{
    call_t *call;
 
restart:   
    call = ipc_wait_for_call(&TASK->answerbox, usec, nonblocking);
    if (!call)
        return 0;
 
    if (call->flags & IPC_CALL_NOTIF) {
        ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC));
        STRUCT_TO_USPACE(&calldata->args, &call->data.args);
        ipc_call_free(call);
       
        return ((__native)call) | IPC_CALLID_NOTIFICATION;
    }
 
    if (call->flags & IPC_CALL_ANSWERED) {
        process_answer(call);
 
        ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC));
 
        atomic_dec(&TASK->active_calls);
 
        if (call->flags & IPC_CALL_DISCARD_ANSWER) {
            ipc_call_free(call);
            goto restart;
        }
 
        STRUCT_TO_USPACE(&calldata->args, &call->data.args);
        ipc_call_free(call);
 
        return ((__native)call) | IPC_CALLID_ANSWERED;
    }
 
    if (process_request(&TASK->answerbox, call))
        goto restart;
 
    /* Include phone address('id') of the caller in the request,
     * copy whole call->data, not only call->data.args */
    if (STRUCT_TO_USPACE(calldata, &call->data)) {
        return 0;
    }
    return (__native)call;
}
 
/** Connect irq handler to task */
__native sys_ipc_register_irq(__native irq, irq_code_t *ucode)
{
    if (!(cap_get(TASK) & CAP_IRQ_REG))
        return EPERM;
 
    if (irq >= IRQ_COUNT)
        return (__native) ELIMIT;
 
    irq_ipc_bind_arch(irq);
 
    return ipc_irq_register(&TASK->answerbox, irq, ucode);
}
 
/* Disconnect irq handler from task */
__native sys_ipc_unregister_irq(__native irq)
{
    if (!(cap_get(TASK) & CAP_IRQ_REG))
        return EPERM;
 
    if (irq >= IRQ_COUNT)
        return (__native) ELIMIT;
 
    ipc_irq_unregister(&TASK->answerbox, irq);
 
    return 0;
}
 

Rev 1417	Rev 1428
1	/*	1	/*
2	* Copyright (C) 2006 Ondrej Palkovsky	2	* Copyright (C) 2006 Ondrej Palkovsky
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	#include <arch.h>	29	#include <arch.h>
30	#include <proc/task.h>	30	#include <proc/task.h>
31	#include <proc/thread.h>	31	#include <proc/thread.h>
32	#include <errno.h>	32	#include <errno.h>
33	#include <memstr.h>	33	#include <memstr.h>
34	#include <debug.h>	34	#include <debug.h>
35	#include <ipc/ipc.h>	35	#include <ipc/ipc.h>
36	#include <ipc/sysipc.h>	36	#include <ipc/sysipc.h>
37	#include <ipc/irq.h>	37	#include <ipc/irq.h>
38	#include <ipc/ipcrsc.h>	38	#include <ipc/ipcrsc.h>
39	#include <arch/interrupt.h>	39	#include <arch/interrupt.h>
40	#include <print.h>	40	#include <print.h>
41	#include <syscall/copy.h>	41	#include <syscall/copy.h>
42	#include <security/cap.h>	42	#include <security/cap.h>
43	#include <mm/as.h>	43	#include <mm/as.h>
44		44
45	#define GET_CHECK_PHONE(phone,phoneid,err) { \	45	#define GET_CHECK_PHONE(phone,phoneid,err) { \
46	if (phoneid > IPC_MAX_PHONES) { err; } \	46	if (phoneid > IPC_MAX_PHONES) { err; } \
47	phone = &TASK->phones[phoneid]; \	47	phone = &TASK->phones[phoneid]; \
48	}	48	}
49		49
50	#define STRUCT_TO_USPACE(dst,src) copy_to_uspace(dst,src,sizeof(*(src)))	50	#define STRUCT_TO_USPACE(dst,src) copy_to_uspace(dst,src,sizeof(*(src)))
51		51
52	/** Return true if the method is a system method */	52	/** Return true if the method is a system method */
53	static inline int is_system_method(__native method)	53	static inline int is_system_method(__native method)
54	{	54	{
55	if (method <= IPC_M_LAST_SYSTEM)	55	if (method <= IPC_M_LAST_SYSTEM)
56	return 1;	56	return 1;
57	return 0;	57	return 0;
58	}	58	}
59		59
60	/** Return true if the message with this method is forwardable	60	/** Return true if the message with this method is forwardable
61	*	61	*
62	* - some system messages may be forwarded, for some of them	62	* - some system messages may be forwarded, for some of them
63	* it is useless	63	* it is useless
64	*/	64	*/
65	static inline int is_forwardable(__native method)	65	static inline int is_forwardable(__native method)
66	{	66	{
67	if (method == IPC_M_PHONE_HUNGUP \|\| method == IPC_M_AS_AREA_SEND)	67	if (method == IPC_M_PHONE_HUNGUP \|\| method == IPC_M_AS_AREA_SEND \
-		68	\|\| method == IPC_M_AS_AREA_RECV)
68	return 0; /* This message is meant only for the receiver */	69	return 0; /* This message is meant only for the receiver */
69	return 1;	70	return 1;
70	}	71	}
71		72
72	/****************************************************/	73	/****************************************************/
73	/* Functions that preprocess answer before sending	74	/* Functions that preprocess answer before sending
74	* it to the recepient	75	* it to the recepient
75	*/	76	*/
76		77
77	/** Return true if the caller (ipc_answer) should save	78	/** Return true if the caller (ipc_answer) should save
78	* the old call contents for answer_preprocess	79	* the old call contents for answer_preprocess
79	*/	80	*/
80	static inline int answer_need_old(call_t *call)	81	static inline int answer_need_old(call_t *call)
81	{	82	{
82	if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME)	83	if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME)
83	return 1;	84	return 1;
84	if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_ME_TO)	85	if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_ME_TO)
85	return 1;	86	return 1;
86	if (IPC_GET_METHOD(call->data) == IPC_M_AS_AREA_SEND)	87	if (IPC_GET_METHOD(call->data) == IPC_M_AS_AREA_SEND)
87	return 1;	88	return 1;
-		89	if (IPC_GET_METHOD(call->data) == IPC_M_AS_AREA_RECV)
-		90	return 1;
88	return 0;	91	return 0;
89	}	92	}
90		93
91	/** Interpret process answer as control information */	94	/** Interpret process answer as control information
-		95	*
-		96	* This function is called directly after sys_ipc_answer
-		97	*/
92	static inline int answer_preprocess(call_t answer, ipc_data_t olddata)	98	static inline int answer_preprocess(call_t answer, ipc_data_t olddata)
93	{	99	{
94	int phoneid;	100	int phoneid;
95		101
96	if (IPC_GET_RETVAL(answer->data) == EHANGUP) {	102	if (IPC_GET_RETVAL(answer->data) == EHANGUP) {
97	/* In case of forward, hangup the forwared phone,	103	/* In case of forward, hangup the forwared phone,
98	* not the originator	104	* not the originator
99	*/	105	*/
100	spinlock_lock(&answer->data.phone->lock);	106	spinlock_lock(&answer->data.phone->lock);
101	spinlock_lock(&TASK->answerbox.lock);	107	spinlock_lock(&TASK->answerbox.lock);
102	if (answer->data.phone->callee) {	108	if (answer->data.phone->callee) {
103	list_remove(&answer->data.phone->list);	109	list_remove(&answer->data.phone->list);
104	answer->data.phone->callee = 0;	110	answer->data.phone->callee = 0;
105	}	111	}
106	spinlock_unlock(&TASK->answerbox.lock);	112	spinlock_unlock(&TASK->answerbox.lock);
107	spinlock_unlock(&answer->data.phone->lock);	113	spinlock_unlock(&answer->data.phone->lock);
108	}	114	}
109		115
110	if (!olddata)	116	if (!olddata)
111	return 0;	117	return 0;
112		118
113	if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_TO_ME) {	119	if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_TO_ME) {
114	phoneid = IPC_GET_ARG3(*olddata);	120	phoneid = IPC_GET_ARG3(*olddata);
115	if (IPC_GET_RETVAL(answer->data)) {	121	if (IPC_GET_RETVAL(answer->data)) {
116	/* The connection was not accepted */	122	/* The connection was not accepted */
117	phone_dealloc(phoneid);	123	phone_dealloc(phoneid);
118	} else {	124	} else {
119	/* The connection was accepted */	125	/* The connection was accepted */
120	phone_connect(phoneid,&answer->sender->answerbox);	126	phone_connect(phoneid,&answer->sender->answerbox);
121	/* Set 'phone identification' as arg3 of response */	127	/* Set 'phone identification' as arg3 of response */
122	IPC_SET_ARG3(answer->data, (__native)&TASK->phones[phoneid]);	128	IPC_SET_ARG3(answer->data, (__native)&TASK->phones[phoneid]);
123	}	129	}
124	} else if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_ME_TO) {	130	} else if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_ME_TO) {
125	/* If the users accepted call, connect */	131	/* If the users accepted call, connect */
126	if (!IPC_GET_RETVAL(answer->data)) {	132	if (!IPC_GET_RETVAL(answer->data)) {
127	ipc_phone_connect((phone_t )IPC_GET_ARG3(olddata),	133	ipc_phone_connect((phone_t )IPC_GET_ARG3(olddata),
128	&TASK->answerbox);	134	&TASK->answerbox);
129	}	135	}
130	} else if (IPC_GET_METHOD(*olddata) == IPC_M_AS_AREA_SEND) {	136	} else if (IPC_GET_METHOD(*olddata) == IPC_M_AS_AREA_SEND) {
131	if (!IPC_GET_RETVAL(answer->data)) { /* Accepted, handle as_area receipt */	137	if (!IPC_GET_RETVAL(answer->data)) { /* Accepted, handle as_area receipt */
132	ipl_t ipl;	138	ipl_t ipl;
133	as_t *as;	139	as_t *as;
134		140
135	ipl = interrupts_disable();	141	ipl = interrupts_disable();
136	spinlock_lock(&answer->sender->lock);	142	spinlock_lock(&answer->sender->lock);
137	as = answer->sender->as;	143	as = answer->sender->as;
138	spinlock_unlock(&answer->sender->lock);	144	spinlock_unlock(&answer->sender->lock);
139	interrupts_restore(ipl);	145	interrupts_restore(ipl);
140		146
141	return as_area_share(as, IPC_GET_ARG1(olddata), IPC_GET_ARG2(olddata),	147	return as_area_share(as, IPC_GET_ARG1(olddata), IPC_GET_ARG2(olddata),
142	IPC_GET_ARG1(answer->data), IPC_GET_ARG3(*olddata));	148	AS, IPC_GET_ARG1(answer->data), IPC_GET_ARG3(*olddata));
-		149	}
-		150	} else if (IPC_GET_METHOD(*olddata) == IPC_M_AS_AREA_RECV) {
-		151	if (!IPC_GET_RETVAL(answer->data)) {
-		152	ipl_t ipl;
-		153	as_t *as;
-		154
-		155	ipl = interrupts_disable();
-		156	spinlock_lock(&answer->sender->lock);
-		157	as = answer->sender->as;
-		158	spinlock_unlock(&answer->sender->lock);
-		159	interrupts_restore(ipl);
-		160
-		161	return as_area_share(AS, IPC_GET_ARG1(answer->data), IPC_GET_ARG2(*olddata),
-		162	as, IPC_GET_ARG1(olddata), IPC_GET_ARG3(olddata));
143	}	163	}
144	}	164	}
145	return 0;	165	return 0;
146	}	166	}
147		167
148	/** Called before the request is sent	168	/** Called before the request is sent
149	*	169	*
150	* @return 0 - no error, -1 - report error to user	170	* @return 0 - no error, -1 - report error to user
151	*/	171	*/
152	static int request_preprocess(call_t *call)	172	static int request_preprocess(call_t *call)
153	{	173	{
154	int newphid;	174	int newphid;
155	size_t size;	175	size_t size;
156		176
157	switch (IPC_GET_METHOD(call->data)) {	177	switch (IPC_GET_METHOD(call->data)) {
158	case IPC_M_CONNECT_ME_TO:	178	case IPC_M_CONNECT_ME_TO:
159	newphid = phone_alloc();	179	newphid = phone_alloc();
160	if (newphid < 0)	180	if (newphid < 0)
161	return ELIMIT;	181	return ELIMIT;
162	/* Set arg3 for server */	182	/* Set arg3 for server */
163	IPC_SET_ARG3(call->data, (__native)&TASK->phones[newphid]);	183	IPC_SET_ARG3(call->data, (__native)&TASK->phones[newphid]);
164	call->flags \|= IPC_CALL_CONN_ME_TO;	184	call->flags \|= IPC_CALL_CONN_ME_TO;
165	call->private = newphid;	185	call->private = newphid;
166	break;	186	break;
167	case IPC_M_AS_AREA_SEND:	187	case IPC_M_AS_AREA_SEND:
168	size = as_get_size(IPC_GET_ARG1(call->data));	188	size = as_get_size(IPC_GET_ARG1(call->data));
169	if (!size) {	189	if (!size) {
170	return EPERM;	190	return EPERM;
171	}	191	}
172	IPC_SET_ARG2(call->data, size);	192	IPC_SET_ARG2(call->data, size);
173	break;	193	break;
174	default:	194	default:
175	break;	195	break;
176	}	196	}
177	return 0;	197	return 0;
178	}	198	}
179		199
180	/****************************************************/	200	/****************************************************/
181	/* Functions called to process received call/answer	201	/* Functions called to process received call/answer
182	* before passing to uspace	202	* before passing to uspace
183	*/	203	*/
184		204
185	/** Do basic kernel processing of received call answer */	205	/** Do basic kernel processing of received call answer */
186	static void process_answer(call_t *call)	206	static void process_answer(call_t *call)
187	{	207	{
188	if (IPC_GET_RETVAL(call->data) == EHANGUP && \	208	if (IPC_GET_RETVAL(call->data) == EHANGUP && \
189	call->flags & IPC_CALL_FORWARDED)	209	call->flags & IPC_CALL_FORWARDED)
190	IPC_SET_RETVAL(call->data, EFORWARD);	210	IPC_SET_RETVAL(call->data, EFORWARD);
191		211
192	if (call->flags & IPC_CALL_CONN_ME_TO) {	212	if (call->flags & IPC_CALL_CONN_ME_TO) {
193	if (IPC_GET_RETVAL(call->data))	213	if (IPC_GET_RETVAL(call->data))
194	phone_dealloc(call->private);	214	phone_dealloc(call->private);
195	else	215	else
196	IPC_SET_ARG3(call->data, call->private);	216	IPC_SET_ARG3(call->data, call->private);
197	}	217	}
198	}	218	}
199		219
200	/** Do basic kernel processing of received call request	220	/** Do basic kernel processing of received call request
201	*	221	*
202	* @return 0 - the call should be passed to userspace, 1 - ignore call	222	* @return 0 - the call should be passed to userspace, 1 - ignore call
203	*/	223	*/
204	static int process_request(answerbox_t box,call_t call)	224	static int process_request(answerbox_t box,call_t call)
205	{	225	{
206	int phoneid;	226	int phoneid;
207		227
208	if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME) {	228	if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME) {
209	phoneid = phone_alloc();	229	phoneid = phone_alloc();
210	if (phoneid < 0) { /* Failed to allocate phone */	230	if (phoneid < 0) { /* Failed to allocate phone */
211	IPC_SET_RETVAL(call->data, ELIMIT);	231	IPC_SET_RETVAL(call->data, ELIMIT);
212	ipc_answer(box,call);	232	ipc_answer(box,call);
213	return -1;	233	return -1;
214	}	234	}
215	IPC_SET_ARG3(call->data, phoneid);	235	IPC_SET_ARG3(call->data, phoneid);
216	}	236	}
217	return 0;	237	return 0;
218	}	238	}
219		239
220	/** Send a call over IPC, wait for reply, return to user	240	/** Send a call over IPC, wait for reply, return to user
221	*	241	*
222	* @return Call identification, returns -1 on fatal error,	242	* @return Call identification, returns -1 on fatal error,
223	-2 on 'Too many async request, handle answers first	243	-2 on 'Too many async request, handle answers first
224	*/	244	*/
225	__native sys_ipc_call_sync_fast(__native phoneid, __native method,	245	__native sys_ipc_call_sync_fast(__native phoneid, __native method,
226	__native arg1, ipc_data_t *data)	246	__native arg1, ipc_data_t *data)
227	{	247	{
228	call_t call;	248	call_t call;
229	phone_t *phone;	249	phone_t *phone;
230	int res;	250	int res;
231		251
232	GET_CHECK_PHONE(phone, phoneid, return ENOENT);	252	GET_CHECK_PHONE(phone, phoneid, return ENOENT);
233		253
234	ipc_call_static_init(&call);	254	ipc_call_static_init(&call);
235	IPC_SET_METHOD(call.data, method);	255	IPC_SET_METHOD(call.data, method);
236	IPC_SET_ARG1(call.data, arg1);	256	IPC_SET_ARG1(call.data, arg1);
237		257
238	if (!(res=request_preprocess(&call))) {	258	if (!(res=request_preprocess(&call))) {
239	ipc_call_sync(phone, &call);	259	ipc_call_sync(phone, &call);
240	process_answer(&call);	260	process_answer(&call);
241	} else	261	} else
242	IPC_SET_RETVAL(call.data, res);	262	IPC_SET_RETVAL(call.data, res);
243	STRUCT_TO_USPACE(&data->args, &call.data.args);	263	STRUCT_TO_USPACE(&data->args, &call.data.args);
244		264
245	return 0;	265	return 0;
246	}	266	}
247		267
248	/** Synchronous IPC call allowing to send whole message */	268	/** Synchronous IPC call allowing to send whole message */
249	__native sys_ipc_call_sync(__native phoneid, ipc_data_t *question,	269	__native sys_ipc_call_sync(__native phoneid, ipc_data_t *question,
250	ipc_data_t *reply)	270	ipc_data_t *reply)
251	{	271	{
252	call_t call;	272	call_t call;
253	phone_t *phone;	273	phone_t *phone;
254	int res;	274	int res;
255	int rc;	275	int rc;
256		276
257	ipc_call_static_init(&call);	277	ipc_call_static_init(&call);
258	rc = copy_from_uspace(&call.data.args, &question->args, sizeof(call.data.args));	278	rc = copy_from_uspace(&call.data.args, &question->args, sizeof(call.data.args));
259	if (rc != 0)	279	if (rc != 0)
260	return (__native) rc;	280	return (__native) rc;
261		281
262	GET_CHECK_PHONE(phone, phoneid, return ENOENT);	282	GET_CHECK_PHONE(phone, phoneid, return ENOENT);
263		283
264	if (!(res=request_preprocess(&call))) {	284	if (!(res=request_preprocess(&call))) {
265	ipc_call_sync(phone, &call);	285	ipc_call_sync(phone, &call);
266	process_answer(&call);	286	process_answer(&call);
267	} else	287	} else
268	IPC_SET_RETVAL(call.data, res);	288	IPC_SET_RETVAL(call.data, res);
269		289
270	rc = STRUCT_TO_USPACE(&reply->args, &call.data.args);	290	rc = STRUCT_TO_USPACE(&reply->args, &call.data.args);
271	if (rc != 0)	291	if (rc != 0)
272	return rc;	292	return rc;
273		293
274	return 0;	294	return 0;
275	}	295	}
276		296
277	/** Check that the task did not exceed allowed limit	297	/** Check that the task did not exceed allowed limit
278	*	298	*
279	* @return 0 - Limit OK, -1 - limit exceeded	299	* @return 0 - Limit OK, -1 - limit exceeded
280	*/	300	*/
281	static int check_call_limit(void)	301	static int check_call_limit(void)
282	{	302	{
283	if (atomic_preinc(&TASK->active_calls) > IPC_MAX_ASYNC_CALLS) {	303	if (atomic_preinc(&TASK->active_calls) > IPC_MAX_ASYNC_CALLS) {
284	atomic_dec(&TASK->active_calls);	304	atomic_dec(&TASK->active_calls);
285	return -1;	305	return -1;
286	}	306	}
287	return 0;	307	return 0;
288	}	308	}
289		309
290	/** Send an asynchronous call over ipc	310	/** Send an asynchronous call over ipc
291	*	311	*
292	* @return Call identification, returns -1 on fatal error,	312	* @return Call identification, returns -1 on fatal error,
293	-2 on 'Too many async request, handle answers first	313	-2 on 'Too many async request, handle answers first
294	*/	314	*/
295	__native sys_ipc_call_async_fast(__native phoneid, __native method,	315	__native sys_ipc_call_async_fast(__native phoneid, __native method,
296	__native arg1, __native arg2)	316	__native arg1, __native arg2)
297	{	317	{
298	call_t *call;	318	call_t *call;
299	phone_t *phone;	319	phone_t *phone;
300	int res;	320	int res;
301		321
302	if (check_call_limit())	322	if (check_call_limit())
303	return IPC_CALLRET_TEMPORARY;	323	return IPC_CALLRET_TEMPORARY;
304		324
305	GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL);	325	GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL);
306		326
307	call = ipc_call_alloc(0);	327	call = ipc_call_alloc(0);
308	IPC_SET_METHOD(call->data, method);	328	IPC_SET_METHOD(call->data, method);
309	IPC_SET_ARG1(call->data, arg1);	329	IPC_SET_ARG1(call->data, arg1);
310	IPC_SET_ARG2(call->data, arg2);	330	IPC_SET_ARG2(call->data, arg2);
311		331
312	if (!(res=request_preprocess(call)))	332	if (!(res=request_preprocess(call)))
313	ipc_call(phone, call);	333	ipc_call(phone, call);
314	else	334	else
315	ipc_backsend_err(phone, call, res);	335	ipc_backsend_err(phone, call, res);
316		336
317	return (__native) call;	337	return (__native) call;
318	}	338	}
319		339
320	/** Synchronous IPC call allowing to send whole message	340	/** Synchronous IPC call allowing to send whole message
321	*	341	*
322	* @return The same as sys_ipc_call_async	342	* @return The same as sys_ipc_call_async
323	*/	343	*/
324	__native sys_ipc_call_async(__native phoneid, ipc_data_t *data)	344	__native sys_ipc_call_async(__native phoneid, ipc_data_t *data)
325	{	345	{
326	call_t *call;	346	call_t *call;
327	phone_t *phone;	347	phone_t *phone;
328	int res;	348	int res;
329	int rc;	349	int rc;
330		350
331	if (check_call_limit())	351	if (check_call_limit())
332	return IPC_CALLRET_TEMPORARY;	352	return IPC_CALLRET_TEMPORARY;
333		353
334	GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL);	354	GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL);
335		355
336	call = ipc_call_alloc(0);	356	call = ipc_call_alloc(0);
337	rc = copy_from_uspace(&call->data.args, &data->args, sizeof(call->data.args));	357	rc = copy_from_uspace(&call->data.args, &data->args, sizeof(call->data.args));
338	if (rc != 0) {	358	if (rc != 0) {
339	ipc_call_free(call);	359	ipc_call_free(call);
340	return (__native) rc;	360	return (__native) rc;
341	}	361	}
342	if (!(res=request_preprocess(call)))	362	if (!(res=request_preprocess(call)))
343	ipc_call(phone, call);	363	ipc_call(phone, call);
344	else	364	else
345	ipc_backsend_err(phone, call, res);	365	ipc_backsend_err(phone, call, res);
346		366
347	return (__native) call;	367	return (__native) call;
348	}	368	}
349		369
350	/** Forward received call to another destination	370	/** Forward received call to another destination
351	*	371	*
352	* The arg1 and arg2 are changed in the forwarded message	372	* The arg1 and arg2 are changed in the forwarded message
353	*	373	*
354	* Warning: If implementing non-fast version, make sure that	374	* Warning: If implementing non-fast version, make sure that
355	* arg3 is not rewritten for certain system IPC	375	* arg3 is not rewritten for certain system IPC
356	*/	376	*/
357	__native sys_ipc_forward_fast(__native callid, __native phoneid,	377	__native sys_ipc_forward_fast(__native callid, __native phoneid,
358	__native method, __native arg1)	378	__native method, __native arg1)
359	{	379	{
360	call_t *call;	380	call_t *call;
361	phone_t *phone;	381	phone_t *phone;
362		382
363	call = get_call(callid);	383	call = get_call(callid);
364	if (!call)	384	if (!call)
365	return ENOENT;	385	return ENOENT;
366		386
367	call->flags \|= IPC_CALL_FORWARDED;	387	call->flags \|= IPC_CALL_FORWARDED;
368		388
369	GET_CHECK_PHONE(phone, phoneid, {	389	GET_CHECK_PHONE(phone, phoneid, {
370	IPC_SET_RETVAL(call->data, EFORWARD);	390	IPC_SET_RETVAL(call->data, EFORWARD);
371	ipc_answer(&TASK->answerbox, call);	391	ipc_answer(&TASK->answerbox, call);
372	return ENOENT;	392	return ENOENT;
373	});	393	});
374		394
375	if (!is_forwardable(IPC_GET_METHOD(call->data))) {	395	if (!is_forwardable(IPC_GET_METHOD(call->data))) {
376	IPC_SET_RETVAL(call->data, EFORWARD);	396	IPC_SET_RETVAL(call->data, EFORWARD);
377	ipc_answer(&TASK->answerbox, call);	397	ipc_answer(&TASK->answerbox, call);
378	return EPERM;	398	return EPERM;
379	}	399	}
380		400
381	/* Userspace is not allowed to change method of system methods	401	/* Userspace is not allowed to change method of system methods
382	* on forward, allow changing ARG1 and ARG2 by means of method and arg1	402	* on forward, allow changing ARG1 and ARG2 by means of method and arg1
383	*/	403	*/
384	if (is_system_method(IPC_GET_METHOD(call->data))) {	404	if (is_system_method(IPC_GET_METHOD(call->data))) {
385	if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME)	405	if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME)
386	phone_dealloc(IPC_GET_ARG3(call->data));	406	phone_dealloc(IPC_GET_ARG3(call->data));
387		407
388	IPC_SET_ARG1(call->data, method);	408	IPC_SET_ARG1(call->data, method);
389	IPC_SET_ARG2(call->data, arg1);	409	IPC_SET_ARG2(call->data, arg1);
390	} else {	410	} else {
391	IPC_SET_METHOD(call->data, method);	411	IPC_SET_METHOD(call->data, method);
392	IPC_SET_ARG1(call->data, arg1);	412	IPC_SET_ARG1(call->data, arg1);
393	}	413	}
394		414
395	return ipc_forward(call, phone, &TASK->answerbox);	415	return ipc_forward(call, phone, &TASK->answerbox);
396	}	416	}
397		417
398	/** Send IPC answer */	418	/** Send IPC answer */
399	__native sys_ipc_answer_fast(__native callid, __native retval,	419	__native sys_ipc_answer_fast(__native callid, __native retval,
400	__native arg1, __native arg2)	420	__native arg1, __native arg2)
401	{	421	{
402	call_t *call;	422	call_t *call;
403	ipc_data_t saved_data;	423	ipc_data_t saved_data;
404	int saveddata = 0;	424	int saveddata = 0;
405	int rc;	425	int rc;
406		426
407	/* Do not answer notification callids */	427	/* Do not answer notification callids */
408	if (callid & IPC_CALLID_NOTIFICATION)	428	if (callid & IPC_CALLID_NOTIFICATION)
409	return 0;	429	return 0;
410		430
411	call = get_call(callid);	431	call = get_call(callid);
412	if (!call)	432	if (!call)
413	return ENOENT;	433	return ENOENT;
414		434
415	if (answer_need_old(call)) {	435	if (answer_need_old(call)) {
416	memcpy(&saved_data, &call->data, sizeof(call->data));	436	memcpy(&saved_data, &call->data, sizeof(call->data));
417	saveddata = 1;	437	saveddata = 1;
418	}	438	}
419		439
420	IPC_SET_RETVAL(call->data, retval);	440	IPC_SET_RETVAL(call->data, retval);
421	IPC_SET_ARG1(call->data, arg1);	441	IPC_SET_ARG1(call->data, arg1);
422	IPC_SET_ARG2(call->data, arg2);	442	IPC_SET_ARG2(call->data, arg2);
423	rc = answer_preprocess(call, saveddata ? &saved_data : NULL);	443	rc = answer_preprocess(call, saveddata ? &saved_data : NULL);
424		444
425	ipc_answer(&TASK->answerbox, call);	445	ipc_answer(&TASK->answerbox, call);
426	return rc;	446	return rc;
427	}	447	}
428		448
429	/** Send IPC answer */	449	/** Send IPC answer */
430	__native sys_ipc_answer(__native callid, ipc_data_t *data)	450	__native sys_ipc_answer(__native callid, ipc_data_t *data)
431	{	451	{
432	call_t *call;	452	call_t *call;
433	ipc_data_t saved_data;	453	ipc_data_t saved_data;
434	int saveddata = 0;	454	int saveddata = 0;
435	int rc;	455	int rc;
436		456
437	/* Do not answer notification callids */	457	/* Do not answer notification callids */
438	if (callid & IPC_CALLID_NOTIFICATION)	458	if (callid & IPC_CALLID_NOTIFICATION)
439	return 0;	459	return 0;
440		460
441	call = get_call(callid);	461	call = get_call(callid);
442	if (!call)	462	if (!call)
443	return ENOENT;	463	return ENOENT;
444		464
445	if (answer_need_old(call)) {	465	if (answer_need_old(call)) {
446	memcpy(&saved_data, &call->data, sizeof(call->data));	466	memcpy(&saved_data, &call->data, sizeof(call->data));
447	saveddata = 1;	467	saveddata = 1;
448	}	468	}
449	rc = copy_from_uspace(&call->data.args, &data->args,	469	rc = copy_from_uspace(&call->data.args, &data->args,
450	sizeof(call->data.args));	470	sizeof(call->data.args));
451	if (rc != 0)	471	if (rc != 0)
452	return rc;	472	return rc;
453		473
454	rc = answer_preprocess(call, saveddata ? &saved_data : NULL);	474	rc = answer_preprocess(call, saveddata ? &saved_data : NULL);
455		475
456	ipc_answer(&TASK->answerbox, call);	476	ipc_answer(&TASK->answerbox, call);
457		477
458	return rc;	478	return rc;
459	}	479	}
460		480
461	/** Hang up the phone	481	/** Hang up the phone
462	*	482	*
463	*/	483	*/
464	__native sys_ipc_hangup(int phoneid)	484	__native sys_ipc_hangup(int phoneid)
465	{	485	{
466	phone_t *phone;	486	phone_t *phone;
467		487
468	GET_CHECK_PHONE(phone, phoneid, return ENOENT);	488	GET_CHECK_PHONE(phone, phoneid, return ENOENT);
469		489
470	if (ipc_phone_hangup(phone))	490	if (ipc_phone_hangup(phone))
471	return -1;	491	return -1;
472		492
473	return 0;	493	return 0;
474	}	494	}
475		495
476	/** Wait for incoming ipc call or answer	496	/** Wait for incoming ipc call or answer
477	*	497	*
478	* @param calldata Pointer to buffer where the call/answer data is stored	498	* @param calldata Pointer to buffer where the call/answer data is stored
479	* @param usec Timeout. See waitq_sleep_timeout() for explanation.	499	* @param usec Timeout. See waitq_sleep_timeout() for explanation.
480	* @param nonblocking See waitq_sleep_timeout() for explanation.	500	* @param nonblocking See waitq_sleep_timeout() for explanation.

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(root)/kernel/trunk/generic/src/ipc/sysipc.c – Rev 1417 → 1428