WebSVN – HelenOS – Diff – /branches/tracing/kernel/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)
        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;
    return 0;
}
 
/** Interpret process answer as control information */
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),
                IPC_GET_ARG1(answer->data), 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 1413	Rev 1417
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	return 0; /* This message is meant only for the receiver */	68	return 0; /* This message is meant only for the receiver */
69	return 1;	69	return 1;
70	}	70	}
71		71
72	/****************************************************/	72	/****************************************************/
73	/* Functions that preprocess answer before sending	73	/* Functions that preprocess answer before sending
74	* it to the recepient	74	* it to the recepient
75	*/	75	*/
76		76
77	/** Return true if the caller (ipc_answer) should save	77	/** Return true if the caller (ipc_answer) should save
78	* the old call contents for answer_preprocess	78	* the old call contents for answer_preprocess
79	*/	79	*/
80	static inline int answer_need_old(call_t *call)	80	static inline int answer_need_old(call_t *call)
81	{	81	{
82	if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME)	82	if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME)
83	return 1;	83	return 1;
84	if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_ME_TO)	84	if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_ME_TO)
85	return 1;	85	return 1;
86	if (IPC_GET_METHOD(call->data) == IPC_M_AS_AREA_SEND)	86	if (IPC_GET_METHOD(call->data) == IPC_M_AS_AREA_SEND)
87	return 1;	87	return 1;
88	return 0;	88	return 0;
89	}	89	}
90		90
91	/** Interpret process answer as control information */	91	/** Interpret process answer as control information */
92	static inline int answer_preprocess(call_t answer, ipc_data_t olddata)	92	static inline int answer_preprocess(call_t answer, ipc_data_t olddata)
93	{	93	{
94	int phoneid;	94	int phoneid;
95		95
96	if (IPC_GET_RETVAL(answer->data) == EHANGUP) {	96	if (IPC_GET_RETVAL(answer->data) == EHANGUP) {
97	/* In case of forward, hangup the forwared phone,	97	/* In case of forward, hangup the forwared phone,
98	* not the originator	98	* not the originator
99	*/	99	*/
100	spinlock_lock(&answer->data.phone->lock);	100	spinlock_lock(&answer->data.phone->lock);
101	spinlock_lock(&TASK->answerbox.lock);	101	spinlock_lock(&TASK->answerbox.lock);
102	if (answer->data.phone->callee) {	102	if (answer->data.phone->callee) {
103	list_remove(&answer->data.phone->list);	103	list_remove(&answer->data.phone->list);
104	answer->data.phone->callee = 0;	104	answer->data.phone->callee = 0;
105	}	105	}
106	spinlock_unlock(&TASK->answerbox.lock);	106	spinlock_unlock(&TASK->answerbox.lock);
107	spinlock_unlock(&answer->data.phone->lock);	107	spinlock_unlock(&answer->data.phone->lock);
108	}	108	}
109		109
110	if (!olddata)	110	if (!olddata)
111	return 0;	111	return 0;
112		112
113	if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_TO_ME) {	113	if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_TO_ME) {
114	phoneid = IPC_GET_ARG3(*olddata);	114	phoneid = IPC_GET_ARG3(*olddata);
115	if (IPC_GET_RETVAL(answer->data)) {	115	if (IPC_GET_RETVAL(answer->data)) {
116	/* The connection was not accepted */	116	/* The connection was not accepted */
117	phone_dealloc(phoneid);	117	phone_dealloc(phoneid);
118	} else {	118	} else {
119	/* The connection was accepted */	119	/* The connection was accepted */
120	phone_connect(phoneid,&answer->sender->answerbox);	120	phone_connect(phoneid,&answer->sender->answerbox);
121	/* Set 'phone identification' as arg3 of response */	121	/* Set 'phone identification' as arg3 of response */
122	IPC_SET_ARG3(answer->data, (__native)&TASK->phones[phoneid]);	122	IPC_SET_ARG3(answer->data, (__native)&TASK->phones[phoneid]);
123	}	123	}
124	} else if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_ME_TO) {	124	} else if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_ME_TO) {
125	/* If the users accepted call, connect */	125	/* If the users accepted call, connect */
126	if (!IPC_GET_RETVAL(answer->data)) {	126	if (!IPC_GET_RETVAL(answer->data)) {
127	ipc_phone_connect((phone_t )IPC_GET_ARG3(olddata),	127	ipc_phone_connect((phone_t )IPC_GET_ARG3(olddata),
128	&TASK->answerbox);	128	&TASK->answerbox);
129	}	129	}
130	} else if (IPC_GET_METHOD(*olddata) == IPC_M_AS_AREA_SEND) {	130	} else if (IPC_GET_METHOD(*olddata) == IPC_M_AS_AREA_SEND) {
131	if (!IPC_GET_RETVAL(answer->data)) { /* Accepted, handle as_area receipt */	131	if (!IPC_GET_RETVAL(answer->data)) { /* Accepted, handle as_area receipt */
132	ipl_t ipl;	132	ipl_t ipl;
133	as_t *as;	133	as_t *as;
134		134
135	ipl = interrupts_disable();	135	ipl = interrupts_disable();
136	spinlock_lock(&answer->sender->lock);	136	spinlock_lock(&answer->sender->lock);
137	as = answer->sender->as;	137	as = answer->sender->as;
138	spinlock_unlock(&answer->sender->lock);	138	spinlock_unlock(&answer->sender->lock);
139	interrupts_restore(ipl);	139	interrupts_restore(ipl);
140		140
141	return as_area_share(as, IPC_GET_ARG2(olddata),IPC_GET_ARG3(olddata),	141	return as_area_share(as, IPC_GET_ARG1(olddata), IPC_GET_ARG2(olddata),
142	IPC_GET_ARG1(answer->data));	142	IPC_GET_ARG1(answer->data), IPC_GET_ARG3(*olddata));
143	}	143	}
144	}	144	}
145	return 0;	145	return 0;
146	}	146	}
147		147
148	/** Called before the request is sent	148	/** Called before the request is sent
149	*	149	*
150	* @return 0 - no error, -1 - report error to user	150	* @return 0 - no error, -1 - report error to user
151	*/	151	*/
152	static int request_preprocess(call_t *call)	152	static int request_preprocess(call_t *call)
153	{	153	{
154	int newphid;	154	int newphid;
155	size_t size;	155	size_t size;
156		156
157	switch (IPC_GET_METHOD(call->data)) {	157	switch (IPC_GET_METHOD(call->data)) {
158	case IPC_M_CONNECT_ME_TO:	158	case IPC_M_CONNECT_ME_TO:
159	newphid = phone_alloc();	159	newphid = phone_alloc();
160	if (newphid < 0)	160	if (newphid < 0)
161	return ELIMIT;	161	return ELIMIT;
162	/* Set arg3 for server */	162	/* Set arg3 for server */
163	IPC_SET_ARG3(call->data, (__native)&TASK->phones[newphid]);	163	IPC_SET_ARG3(call->data, (__native)&TASK->phones[newphid]);
164	call->flags \|= IPC_CALL_CONN_ME_TO;	164	call->flags \|= IPC_CALL_CONN_ME_TO;
165	call->private = newphid;	165	call->private = newphid;
166	break;	166	break;
167	case IPC_M_AS_AREA_SEND:	167	case IPC_M_AS_AREA_SEND:
168	size = as_get_size(IPC_GET_ARG2(call->data));	168	size = as_get_size(IPC_GET_ARG1(call->data));
169	if (!size) {	169	if (!size) {
170	return EPERM;	170	return EPERM;
171	}	171	}
172	IPC_SET_ARG3(call->data, size);	172	IPC_SET_ARG2(call->data, size);
173	break;	173	break;
174	default:	174	default:
175	break;	175	break;
176	}	176	}
177	return 0;	177	return 0;
178	}	178	}
179		179
180	/****************************************************/	180	/****************************************************/
181	/* Functions called to process received call/answer	181	/* Functions called to process received call/answer
182	* before passing to uspace	182	* before passing to uspace
183	*/	183	*/
184		184
185	/** Do basic kernel processing of received call answer */	185	/** Do basic kernel processing of received call answer */
186	static void process_answer(call_t *call)	186	static void process_answer(call_t *call)
187	{	187	{
188	if (IPC_GET_RETVAL(call->data) == EHANGUP && \	188	if (IPC_GET_RETVAL(call->data) == EHANGUP && \
189	call->flags & IPC_CALL_FORWARDED)	189	call->flags & IPC_CALL_FORWARDED)
190	IPC_SET_RETVAL(call->data, EFORWARD);	190	IPC_SET_RETVAL(call->data, EFORWARD);
191		191
192	if (call->flags & IPC_CALL_CONN_ME_TO) {	192	if (call->flags & IPC_CALL_CONN_ME_TO) {
193	if (IPC_GET_RETVAL(call->data))	193	if (IPC_GET_RETVAL(call->data))
194	phone_dealloc(call->private);	194	phone_dealloc(call->private);
195	else	195	else
196	IPC_SET_ARG3(call->data, call->private);	196	IPC_SET_ARG3(call->data, call->private);
197	}	197	}
198	}	198	}
199		199
200	/** Do basic kernel processing of received call request	200	/** Do basic kernel processing of received call request
201	*	201	*
202	* @return 0 - the call should be passed to userspace, 1 - ignore call	202	* @return 0 - the call should be passed to userspace, 1 - ignore call
203	*/	203	*/
204	static int process_request(answerbox_t box,call_t call)	204	static int process_request(answerbox_t box,call_t call)
205	{	205	{
206	int phoneid;	206	int phoneid;
207		207
208	if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME) {	208	if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME) {
209	phoneid = phone_alloc();	209	phoneid = phone_alloc();
210	if (phoneid < 0) { /* Failed to allocate phone */	210	if (phoneid < 0) { /* Failed to allocate phone */
211	IPC_SET_RETVAL(call->data, ELIMIT);	211	IPC_SET_RETVAL(call->data, ELIMIT);
212	ipc_answer(box,call);	212	ipc_answer(box,call);
213	return -1;	213	return -1;
214	}	214	}
215	IPC_SET_ARG3(call->data, phoneid);	215	IPC_SET_ARG3(call->data, phoneid);
216	}	216	}
217	return 0;	217	return 0;
218	}	218	}
219		219
220	/** Send a call over IPC, wait for reply, return to user	220	/** Send a call over IPC, wait for reply, return to user
221	*	221	*
222	* @return Call identification, returns -1 on fatal error,	222	* @return Call identification, returns -1 on fatal error,
223	-2 on 'Too many async request, handle answers first	223	-2 on 'Too many async request, handle answers first
224	*/	224	*/
225	__native sys_ipc_call_sync_fast(__native phoneid, __native method,	225	__native sys_ipc_call_sync_fast(__native phoneid, __native method,
226	__native arg1, ipc_data_t *data)	226	__native arg1, ipc_data_t *data)
227	{	227	{
228	call_t call;	228	call_t call;
229	phone_t *phone;	229	phone_t *phone;
230	int res;	230	int res;
231		231
232	GET_CHECK_PHONE(phone, phoneid, return ENOENT);	232	GET_CHECK_PHONE(phone, phoneid, return ENOENT);
233		233
234	ipc_call_static_init(&call);	234	ipc_call_static_init(&call);
235	IPC_SET_METHOD(call.data, method);	235	IPC_SET_METHOD(call.data, method);
236	IPC_SET_ARG1(call.data, arg1);	236	IPC_SET_ARG1(call.data, arg1);
237		237
238	if (!(res=request_preprocess(&call))) {	238	if (!(res=request_preprocess(&call))) {
239	ipc_call_sync(phone, &call);	239	ipc_call_sync(phone, &call);
240	process_answer(&call);	240	process_answer(&call);
241	} else	241	} else
242	IPC_SET_RETVAL(call.data, res);	242	IPC_SET_RETVAL(call.data, res);
243	STRUCT_TO_USPACE(&data->args, &call.data.args);	243	STRUCT_TO_USPACE(&data->args, &call.data.args);
244		244
245	return 0;	245	return 0;
246	}	246	}
247		247
248	/** Synchronous IPC call allowing to send whole message */	248	/** Synchronous IPC call allowing to send whole message */
249	__native sys_ipc_call_sync(__native phoneid, ipc_data_t *question,	249	__native sys_ipc_call_sync(__native phoneid, ipc_data_t *question,
250	ipc_data_t *reply)	250	ipc_data_t *reply)
251	{	251	{
252	call_t call;	252	call_t call;
253	phone_t *phone;	253	phone_t *phone;
254	int res;	254	int res;
255	int rc;	255	int rc;
256		256
257	ipc_call_static_init(&call);	257	ipc_call_static_init(&call);
258	rc = copy_from_uspace(&call.data.args, &question->args, sizeof(call.data.args));	258	rc = copy_from_uspace(&call.data.args, &question->args, sizeof(call.data.args));
259	if (rc != 0)	259	if (rc != 0)
260	return (__native) rc;	260	return (__native) rc;
261		261
262	GET_CHECK_PHONE(phone, phoneid, return ENOENT);	262	GET_CHECK_PHONE(phone, phoneid, return ENOENT);
263		263
264	if (!(res=request_preprocess(&call))) {	264	if (!(res=request_preprocess(&call))) {
265	ipc_call_sync(phone, &call);	265	ipc_call_sync(phone, &call);
266	process_answer(&call);	266	process_answer(&call);
267	} else	267	} else
268	IPC_SET_RETVAL(call.data, res);	268	IPC_SET_RETVAL(call.data, res);
269		269
270	rc = STRUCT_TO_USPACE(&reply->args, &call.data.args);	270	rc = STRUCT_TO_USPACE(&reply->args, &call.data.args);
271	if (rc != 0)	271	if (rc != 0)
272	return rc;	272	return rc;
273		273
274	return 0;	274	return 0;
275	}	275	}
276		276
277	/** Check that the task did not exceed allowed limit	277	/** Check that the task did not exceed allowed limit
278	*	278	*
279	* @return 0 - Limit OK, -1 - limit exceeded	279	* @return 0 - Limit OK, -1 - limit exceeded
280	*/	280	*/
281	static int check_call_limit(void)	281	static int check_call_limit(void)
282	{	282	{
283	if (atomic_preinc(&TASK->active_calls) > IPC_MAX_ASYNC_CALLS) {	283	if (atomic_preinc(&TASK->active_calls) > IPC_MAX_ASYNC_CALLS) {
284	atomic_dec(&TASK->active_calls);	284	atomic_dec(&TASK->active_calls);
285	return -1;	285	return -1;
286	}	286	}
287	return 0;	287	return 0;
288	}	288	}
289		289
290	/** Send an asynchronous call over ipc	290	/** Send an asynchronous call over ipc
291	*	291	*
292	* @return Call identification, returns -1 on fatal error,	292	* @return Call identification, returns -1 on fatal error,
293	-2 on 'Too many async request, handle answers first	293	-2 on 'Too many async request, handle answers first
294	*/	294	*/
295	__native sys_ipc_call_async_fast(__native phoneid, __native method,	295	__native sys_ipc_call_async_fast(__native phoneid, __native method,
296	__native arg1, __native arg2)	296	__native arg1, __native arg2)
297	{	297	{
298	call_t *call;	298	call_t *call;
299	phone_t *phone;	299	phone_t *phone;
300	int res;	300	int res;
301		301
302	if (check_call_limit())	302	if (check_call_limit())
303	return IPC_CALLRET_TEMPORARY;	303	return IPC_CALLRET_TEMPORARY;
304		304
305	GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL);	305	GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL);
306		306
307	call = ipc_call_alloc(0);	307	call = ipc_call_alloc(0);
308	IPC_SET_METHOD(call->data, method);	308	IPC_SET_METHOD(call->data, method);
309	IPC_SET_ARG1(call->data, arg1);	309	IPC_SET_ARG1(call->data, arg1);
310	IPC_SET_ARG2(call->data, arg2);	310	IPC_SET_ARG2(call->data, arg2);
311		311
312	if (!(res=request_preprocess(call)))	312	if (!(res=request_preprocess(call)))
313	ipc_call(phone, call);	313	ipc_call(phone, call);
314	else	314	else
315	ipc_backsend_err(phone, call, res);	315	ipc_backsend_err(phone, call, res);
316		316
317	return (__native) call;	317	return (__native) call;
318	}	318	}
319		319
320	/** Synchronous IPC call allowing to send whole message	320	/** Synchronous IPC call allowing to send whole message
321	*	321	*
322	* @return The same as sys_ipc_call_async	322	* @return The same as sys_ipc_call_async
323	*/	323	*/
324	__native sys_ipc_call_async(__native phoneid, ipc_data_t *data)	324	__native sys_ipc_call_async(__native phoneid, ipc_data_t *data)
325	{	325	{
326	call_t *call;	326	call_t *call;
327	phone_t *phone;	327	phone_t *phone;
328	int res;	328	int res;
329	int rc;	329	int rc;
330		330
331	if (check_call_limit())	331	if (check_call_limit())
332	return IPC_CALLRET_TEMPORARY;	332	return IPC_CALLRET_TEMPORARY;
333		333
334	GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL);	334	GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL);
335		335
336	call = ipc_call_alloc(0);	336	call = ipc_call_alloc(0);
337	rc = copy_from_uspace(&call->data.args, &data->args, sizeof(call->data.args));	337	rc = copy_from_uspace(&call->data.args, &data->args, sizeof(call->data.args));
338	if (rc != 0) {	338	if (rc != 0) {
339	ipc_call_free(call);	339	ipc_call_free(call);
340	return (__native) rc;	340	return (__native) rc;
341	}	341	}
342	if (!(res=request_preprocess(call)))	342	if (!(res=request_preprocess(call)))
343	ipc_call(phone, call);	343	ipc_call(phone, call);
344	else	344	else
345	ipc_backsend_err(phone, call, res);	345	ipc_backsend_err(phone, call, res);
346		346
347	return (__native) call;	347	return (__native) call;
348	}	348	}
349		349
350	/** Forward received call to another destination	350	/** Forward received call to another destination
351	*	351	*
352	* The arg1 and arg2 are changed in the forwarded message	352	* The arg1 and arg2 are changed in the forwarded message
353	*	353	*
354	* Warning: If implementing non-fast version, make sure that	354	* Warning: If implementing non-fast version, make sure that
355	* arg3 is not rewritten for certain system IPC	355	* arg3 is not rewritten for certain system IPC
356	*/	356	*/
357	__native sys_ipc_forward_fast(__native callid, __native phoneid,	357	__native sys_ipc_forward_fast(__native callid, __native phoneid,
358	__native method, __native arg1)	358	__native method, __native arg1)
359	{	359	{
360	call_t *call;	360	call_t *call;
361	phone_t *phone;	361	phone_t *phone;
362		362
363	call = get_call(callid);	363	call = get_call(callid);
364	if (!call)	364	if (!call)
365	return ENOENT;	365	return ENOENT;
366		366
367	call->flags \|= IPC_CALL_FORWARDED;	367	call->flags \|= IPC_CALL_FORWARDED;
368		368
369	GET_CHECK_PHONE(phone, phoneid, {	369	GET_CHECK_PHONE(phone, phoneid, {
370	IPC_SET_RETVAL(call->data, EFORWARD);	370	IPC_SET_RETVAL(call->data, EFORWARD);
371	ipc_answer(&TASK->answerbox, call);	371	ipc_answer(&TASK->answerbox, call);
372	return ENOENT;	372	return ENOENT;
373	});	373	});
374		374
375	if (!is_forwardable(IPC_GET_METHOD(call->data))) {	375	if (!is_forwardable(IPC_GET_METHOD(call->data))) {
376	IPC_SET_RETVAL(call->data, EFORWARD);	376	IPC_SET_RETVAL(call->data, EFORWARD);
377	ipc_answer(&TASK->answerbox, call);	377	ipc_answer(&TASK->answerbox, call);
378	return EPERM;	378	return EPERM;
379	}	379	}
380		380
381	/* Userspace is not allowed to change method of system methods	381	/* Userspace is not allowed to change method of system methods
382	* on forward, allow changing ARG1 and ARG2 by means of method and arg1	382	* on forward, allow changing ARG1 and ARG2 by means of method and arg1
383	*/	383	*/
384	if (is_system_method(IPC_GET_METHOD(call->data))) {	384	if (is_system_method(IPC_GET_METHOD(call->data))) {
385	if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME)	385	if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME)
386	phone_dealloc(IPC_GET_ARG3(call->data));	386	phone_dealloc(IPC_GET_ARG3(call->data));
387		387
388	IPC_SET_ARG1(call->data, method);	388	IPC_SET_ARG1(call->data, method);
389	IPC_SET_ARG2(call->data, arg1);	389	IPC_SET_ARG2(call->data, arg1);
390	} else {	390	} else {
391	IPC_SET_METHOD(call->data, method);	391	IPC_SET_METHOD(call->data, method);
392	IPC_SET_ARG1(call->data, arg1);	392	IPC_SET_ARG1(call->data, arg1);
393	}	393	}
394		394
395	return ipc_forward(call, phone, &TASK->answerbox);	395	return ipc_forward(call, phone, &TASK->answerbox);
396	}	396	}
397		397
398	/** Send IPC answer */	398	/** Send IPC answer */
399	__native sys_ipc_answer_fast(__native callid, __native retval,	399	__native sys_ipc_answer_fast(__native callid, __native retval,
400	__native arg1, __native arg2)	400	__native arg1, __native arg2)
401	{	401	{
402	call_t *call;	402	call_t *call;
403	ipc_data_t saved_data;	403	ipc_data_t saved_data;
404	int saveddata = 0;	404	int saveddata = 0;
405	int rc;	405	int rc;
406		406
407	/* Do not answer notification callids */	407	/* Do not answer notification callids */
408	if (callid & IPC_CALLID_NOTIFICATION)	408	if (callid & IPC_CALLID_NOTIFICATION)
409	return 0;	409	return 0;
410		410
411	call = get_call(callid);	411	call = get_call(callid);
412	if (!call)	412	if (!call)
413	return ENOENT;	413	return ENOENT;
414		414
415	if (answer_need_old(call)) {	415	if (answer_need_old(call)) {
416	memcpy(&saved_data, &call->data, sizeof(call->data));	416	memcpy(&saved_data, &call->data, sizeof(call->data));
417	saveddata = 1;	417	saveddata = 1;
418	}	418	}
419		419
420	IPC_SET_RETVAL(call->data, retval);	420	IPC_SET_RETVAL(call->data, retval);
421	IPC_SET_ARG1(call->data, arg1);	421	IPC_SET_ARG1(call->data, arg1);
422	IPC_SET_ARG2(call->data, arg2);	422	IPC_SET_ARG2(call->data, arg2);
423	rc = answer_preprocess(call, saveddata ? &saved_data : NULL);	423	rc = answer_preprocess(call, saveddata ? &saved_data : NULL);
424		424
425	ipc_answer(&TASK->answerbox, call);	425	ipc_answer(&TASK->answerbox, call);
426	return rc;	426	return rc;
427	}	427	}
428		428
429	/** Send IPC answer */	429	/** Send IPC answer */
430	__native sys_ipc_answer(__native callid, ipc_data_t *data)	430	__native sys_ipc_answer(__native callid, ipc_data_t *data)
431	{	431	{
432	call_t *call;	432	call_t *call;
433	ipc_data_t saved_data;	433	ipc_data_t saved_data;
434	int saveddata = 0;	434	int saveddata = 0;
435	int rc;	435	int rc;
436		436
437	/* Do not answer notification callids */	437	/* Do not answer notification callids */
438	if (callid & IPC_CALLID_NOTIFICATION)	438	if (callid & IPC_CALLID_NOTIFICATION)
439	return 0;	439	return 0;
440		440
441	call = get_call(callid);	441	call = get_call(callid);
442	if (!call)	442	if (!call)
443	return ENOENT;	443	return ENOENT;
444		444
445	if (answer_need_old(call)) {	445	if (answer_need_old(call)) {
446	memcpy(&saved_data, &call->data, sizeof(call->data));	446	memcpy(&saved_data, &call->data, sizeof(call->data));
447	saveddata = 1;	447	saveddata = 1;
448	}	448	}
449	rc = copy_from_uspace(&call->data.args, &data->args,	449	rc = copy_from_uspace(&call->data.args, &data->args,
450	sizeof(call->data.args));	450	sizeof(call->data.args));
451	if (rc != 0)	451	if (rc != 0)
452	return rc;	452	return rc;
453		453
454	rc = answer_preprocess(call, saveddata ? &saved_data : NULL);	454	rc = answer_preprocess(call, saveddata ? &saved_data : NULL);
455		455
456	ipc_answer(&TASK->answerbox, call);	456	ipc_answer(&TASK->answerbox, call);
457		457
458	return rc;	458	return rc;
459	}	459	}
460		460
461	/** Hang up the phone	461	/** Hang up the phone
462	*	462	*
463	*/	463	*/
464	__native sys_ipc_hangup(int phoneid)	464	__native sys_ipc_hangup(int phoneid)
465	{	465	{
466	phone_t *phone;	466	phone_t *phone;
467		467
468	GET_CHECK_PHONE(phone, phoneid, return ENOENT);	468	GET_CHECK_PHONE(phone, phoneid, return ENOENT);
469		469
470	if (ipc_phone_hangup(phone))	470	if (ipc_phone_hangup(phone))
471	return -1;	471	return -1;
472		472
473	return 0;	473	return 0;
474	}	474	}
475		475
476	/** Wait for incoming ipc call or answer	476	/** Wait for incoming ipc call or answer
477	*	477	*
478	* @param calldata Pointer to buffer where the call/answer data is stored	478	* @param calldata Pointer to buffer where the call/answer data is stored
479	* @param usec Timeout. See waitq_sleep_timeout() for explanation.	479	* @param usec Timeout. See waitq_sleep_timeout() for explanation.
480	* @param nonblocking See waitq_sleep_timeout() for explanation.	480	* @param nonblocking See waitq_sleep_timeout() for explanation.
481	*	481	*
482	* @return Callid, if callid & 1, then the call is answer	482	* @return Callid, if callid & 1, then the call is answer
483	*/	483	*/
484	__native sys_ipc_wait_for_call(ipc_data_t *calldata, __u32 usec, int nonblocking)	484	__native sys_ipc_wait_for_call(ipc_data_t *calldata, __u32 usec, int nonblocking)
485	{	485	{
486	call_t *call;	486	call_t *call;
487		487
488	restart:	488	restart:
489	call = ipc_wait_for_call(&TASK->answerbox, usec, nonblocking);	489	call = ipc_wait_for_call(&TASK->answerbox, usec, nonblocking);
490	if (!call)	490	if (!call)
491	return 0;	491	return 0;
492		492
493	if (call->flags & IPC_CALL_NOTIF) {	493	if (call->flags & IPC_CALL_NOTIF) {
494	ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC));	494	ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC));
495	STRUCT_TO_USPACE(&calldata->args, &call->data.args);	495	STRUCT_TO_USPACE(&calldata->args, &call->data.args);
496	ipc_call_free(call);	496	ipc_call_free(call);
497		497
498	return ((__native)call) \| IPC_CALLID_NOTIFICATION;	498	return ((__native)call) \| IPC_CALLID_NOTIFICATION;
499	}	499	}
500		500

Subversion Repositories HelenOS

(root)/branches/tracing/kernel/generic/src/ipc/sysipc.c @ 4759 – Rev 1413 → 1417