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->state == IPC_PHONE_CONNECTED) {
            list_remove(&answer->data.phone->list);
            answer->data.phone->state = IPC_PHONE_SLAMMED;
        }
        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;
            int rc;
            as_t *as;
           
            ipl = interrupts_disable();
            spinlock_lock(&answer->sender->lock);
            as = answer->sender->as;
            spinlock_unlock(&answer->sender->lock);
            interrupts_restore(ipl);
           
            rc = as_area_share(as, IPC_GET_ARG1(*olddata), IPC_GET_ARG2(*olddata),
                       AS, IPC_GET_ARG1(answer->data), IPC_GET_ARG3(*olddata));
            IPC_SET_RETVAL(answer->data, rc);
            return rc;
        }
    } else if (IPC_GET_METHOD(*olddata) == IPC_M_AS_AREA_RECV) {
        if (!IPC_GET_RETVAL(answer->data)) {
            ipl_t ipl;
            as_t *as;
            int rc;
           
            ipl = interrupts_disable();
            spinlock_lock(&answer->sender->lock);
            as = answer->sender->as;
            spinlock_unlock(&answer->sender->lock);
            interrupts_restore(ipl);
           
            rc = as_area_share(AS, IPC_GET_ARG1(answer->data), IPC_GET_ARG2(*olddata),
                       as, IPC_GET_ARG1(*olddata), IPC_GET_ARG2(answer->data));
            IPC_SET_RETVAL(answer->data, rc);
        }
    }
    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, 0))
        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 flags Select mode of sleep operation. 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 flags)
{
    call_t *call;
 
restart:   
    call = ipc_wait_for_call(&TASK->answerbox, usec, flags | SYNCH_FLAGS_INTERRUPTIBLE);
    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 1502	Rev 1568
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	\|\| method == IPC_M_AS_AREA_RECV)
69	return 0; /* This message is meant only for the receiver */	69	return 0; /* This message is meant only for the receiver */
70	return 1;	70	return 1;
71	}	71	}
72		72
73	/****************************************************/	73	/****************************************************/
74	/* Functions that preprocess answer before sending	74	/* Functions that preprocess answer before sending
75	* it to the recepient	75	* it to the recepient
76	*/	76	*/
77		77
78	/** Return true if the caller (ipc_answer) should save	78	/** Return true if the caller (ipc_answer) should save
79	* the old call contents for answer_preprocess	79	* the old call contents for answer_preprocess
80	*/	80	*/
81	static inline int answer_need_old(call_t *call)	81	static inline int answer_need_old(call_t *call)
82	{	82	{
83	if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME)	83	if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME)
84	return 1;	84	return 1;
85	if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_ME_TO)	85	if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_ME_TO)
86	return 1;	86	return 1;
87	if (IPC_GET_METHOD(call->data) == IPC_M_AS_AREA_SEND)	87	if (IPC_GET_METHOD(call->data) == IPC_M_AS_AREA_SEND)
88	return 1;	88	return 1;
89	if (IPC_GET_METHOD(call->data) == IPC_M_AS_AREA_RECV)	89	if (IPC_GET_METHOD(call->data) == IPC_M_AS_AREA_RECV)
90	return 1;	90	return 1;
91	return 0;	91	return 0;
92	}	92	}
93		93
94	/** Interpret process answer as control information	94	/** Interpret process answer as control information
95	*	95	*
96	* This function is called directly after sys_ipc_answer	96	* This function is called directly after sys_ipc_answer
97	*/	97	*/
98	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)
99	{	99	{
100	int phoneid;	100	int phoneid;
101		101
102	if (IPC_GET_RETVAL(answer->data) == EHANGUP) {	102	if (IPC_GET_RETVAL(answer->data) == EHANGUP) {
103	/* In case of forward, hangup the forwared phone,	103	/* In case of forward, hangup the forwared phone,
104	* not the originator	104	* not the originator
105	*/	105	*/
106	spinlock_lock(&answer->data.phone->lock);	106	spinlock_lock(&answer->data.phone->lock);
107	spinlock_lock(&TASK->answerbox.lock);	107	spinlock_lock(&TASK->answerbox.lock);
108	if (answer->data.phone->callee) {	108	if (answer->data.phone->state == IPC_PHONE_CONNECTED) {
109	list_remove(&answer->data.phone->list);	109	list_remove(&answer->data.phone->list);
110	answer->data.phone->callee = 0;	110	answer->data.phone->state = IPC_PHONE_SLAMMED;
111	}	111	}
112	spinlock_unlock(&TASK->answerbox.lock);	112	spinlock_unlock(&TASK->answerbox.lock);
113	spinlock_unlock(&answer->data.phone->lock);	113	spinlock_unlock(&answer->data.phone->lock);
114	}	114	}
115		115
116	if (!olddata)	116	if (!olddata)
117	return 0;	117	return 0;
118		118
119	if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_TO_ME) {	119	if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_TO_ME) {
120	phoneid = IPC_GET_ARG3(*olddata);	120	phoneid = IPC_GET_ARG3(*olddata);
121	if (IPC_GET_RETVAL(answer->data)) {	121	if (IPC_GET_RETVAL(answer->data)) {
122	/* The connection was not accepted */	122	/* The connection was not accepted */
123	phone_dealloc(phoneid);	123	phone_dealloc(phoneid);
124	} else {	124	} else {
125	/* The connection was accepted */	125	/* The connection was accepted */
126	phone_connect(phoneid,&answer->sender->answerbox);	126	phone_connect(phoneid,&answer->sender->answerbox);
127	/* Set 'phone identification' as arg3 of response */	127	/* Set 'phone identification' as arg3 of response */
128	IPC_SET_ARG3(answer->data, (__native)&TASK->phones[phoneid]);	128	IPC_SET_ARG3(answer->data, (__native)&TASK->phones[phoneid]);
129	}	129	}
130	} else if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_ME_TO) {	130	} else if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_ME_TO) {
131	/* If the users accepted call, connect */	131	/* If the users accepted call, connect */
132	if (!IPC_GET_RETVAL(answer->data)) {	132	if (!IPC_GET_RETVAL(answer->data)) {
133	ipc_phone_connect((phone_t )IPC_GET_ARG3(olddata),	133	ipc_phone_connect((phone_t )IPC_GET_ARG3(olddata),
134	&TASK->answerbox);	134	&TASK->answerbox);
135	}	135	}
136	} else if (IPC_GET_METHOD(*olddata) == IPC_M_AS_AREA_SEND) {	136	} else if (IPC_GET_METHOD(*olddata) == IPC_M_AS_AREA_SEND) {
137	if (!IPC_GET_RETVAL(answer->data)) { /* Accepted, handle as_area receipt */	137	if (!IPC_GET_RETVAL(answer->data)) { /* Accepted, handle as_area receipt */
138	ipl_t ipl;	138	ipl_t ipl;
139	int rc;	139	int rc;
140	as_t *as;	140	as_t *as;
141		141
142	ipl = interrupts_disable();	142	ipl = interrupts_disable();
143	spinlock_lock(&answer->sender->lock);	143	spinlock_lock(&answer->sender->lock);
144	as = answer->sender->as;	144	as = answer->sender->as;
145	spinlock_unlock(&answer->sender->lock);	145	spinlock_unlock(&answer->sender->lock);
146	interrupts_restore(ipl);	146	interrupts_restore(ipl);
147		147
148	rc = as_area_share(as, IPC_GET_ARG1(olddata), IPC_GET_ARG2(olddata),	148	rc = as_area_share(as, IPC_GET_ARG1(olddata), IPC_GET_ARG2(olddata),
149	AS, IPC_GET_ARG1(answer->data), IPC_GET_ARG3(*olddata));	149	AS, IPC_GET_ARG1(answer->data), IPC_GET_ARG3(*olddata));
150	IPC_SET_RETVAL(answer->data, rc);	150	IPC_SET_RETVAL(answer->data, rc);
151	return rc;	151	return rc;
152	}	152	}
153	} else if (IPC_GET_METHOD(*olddata) == IPC_M_AS_AREA_RECV) {	153	} else if (IPC_GET_METHOD(*olddata) == IPC_M_AS_AREA_RECV) {
154	if (!IPC_GET_RETVAL(answer->data)) {	154	if (!IPC_GET_RETVAL(answer->data)) {
155	ipl_t ipl;	155	ipl_t ipl;
156	as_t *as;	156	as_t *as;
157	int rc;	157	int rc;
158		158
159	ipl = interrupts_disable();	159	ipl = interrupts_disable();
160	spinlock_lock(&answer->sender->lock);	160	spinlock_lock(&answer->sender->lock);
161	as = answer->sender->as;	161	as = answer->sender->as;
162	spinlock_unlock(&answer->sender->lock);	162	spinlock_unlock(&answer->sender->lock);
163	interrupts_restore(ipl);	163	interrupts_restore(ipl);
164		164
165	rc = as_area_share(AS, IPC_GET_ARG1(answer->data), IPC_GET_ARG2(*olddata),	165	rc = as_area_share(AS, IPC_GET_ARG1(answer->data), IPC_GET_ARG2(*olddata),
166	as, IPC_GET_ARG1(*olddata), IPC_GET_ARG2(answer->data));	166	as, IPC_GET_ARG1(*olddata), IPC_GET_ARG2(answer->data));
167	IPC_SET_RETVAL(answer->data, rc);	167	IPC_SET_RETVAL(answer->data, rc);
168	}	168	}
169	}	169	}
170	return 0;	170	return 0;
171	}	171	}
172		172
173	/** Called before the request is sent	173	/** Called before the request is sent
174	*	174	*
175	* @return 0 - no error, -1 - report error to user	175	* @return 0 - no error, -1 - report error to user
176	*/	176	*/
177	static int request_preprocess(call_t *call)	177	static int request_preprocess(call_t *call)
178	{	178	{
179	int newphid;	179	int newphid;
180	size_t size;	180	size_t size;
181		181
182	switch (IPC_GET_METHOD(call->data)) {	182	switch (IPC_GET_METHOD(call->data)) {
183	case IPC_M_CONNECT_ME_TO:	183	case IPC_M_CONNECT_ME_TO:
184	newphid = phone_alloc();	184	newphid = phone_alloc();
185	if (newphid < 0)	185	if (newphid < 0)
186	return ELIMIT;	186	return ELIMIT;
187	/* Set arg3 for server */	187	/* Set arg3 for server */
188	IPC_SET_ARG3(call->data, (__native)&TASK->phones[newphid]);	188	IPC_SET_ARG3(call->data, (__native)&TASK->phones[newphid]);
189	call->flags \|= IPC_CALL_CONN_ME_TO;	189	call->flags \|= IPC_CALL_CONN_ME_TO;
190	call->private = newphid;	190	call->private = newphid;
191	break;	191	break;
192	case IPC_M_AS_AREA_SEND:	192	case IPC_M_AS_AREA_SEND:
193	size = as_get_size(IPC_GET_ARG1(call->data));	193	size = as_get_size(IPC_GET_ARG1(call->data));
194	if (!size) {	194	if (!size) {
195	return EPERM;	195	return EPERM;
196	}	196	}
197	IPC_SET_ARG2(call->data, size);	197	IPC_SET_ARG2(call->data, size);
198	break;	198	break;
199	default:	199	default:
200	break;	200	break;
201	}	201	}
202	return 0;	202	return 0;
203	}	203	}
204		204
205	/****************************************************/	205	/****************************************************/
206	/* Functions called to process received call/answer	206	/* Functions called to process received call/answer
207	* before passing to uspace	207	* before passing to uspace
208	*/	208	*/
209		209
210	/** Do basic kernel processing of received call answer */	210	/** Do basic kernel processing of received call answer */
211	static void process_answer(call_t *call)	211	static void process_answer(call_t *call)
212	{	212	{
213	if (IPC_GET_RETVAL(call->data) == EHANGUP && \	213	if (IPC_GET_RETVAL(call->data) == EHANGUP && \
214	call->flags & IPC_CALL_FORWARDED)	214	call->flags & IPC_CALL_FORWARDED)
215	IPC_SET_RETVAL(call->data, EFORWARD);	215	IPC_SET_RETVAL(call->data, EFORWARD);
216		216
217	if (call->flags & IPC_CALL_CONN_ME_TO) {	217	if (call->flags & IPC_CALL_CONN_ME_TO) {
218	if (IPC_GET_RETVAL(call->data))	218	if (IPC_GET_RETVAL(call->data))
219	phone_dealloc(call->private);	219	phone_dealloc(call->private);
220	else	220	else
221	IPC_SET_ARG3(call->data, call->private);	221	IPC_SET_ARG3(call->data, call->private);
222	}	222	}
223	}	223	}
224		224
225	/** Do basic kernel processing of received call request	225	/** Do basic kernel processing of received call request
226	*	226	*
227	* @return 0 - the call should be passed to userspace, 1 - ignore call	227	* @return 0 - the call should be passed to userspace, 1 - ignore call
228	*/	228	*/
229	static int process_request(answerbox_t box,call_t call)	229	static int process_request(answerbox_t box,call_t call)
230	{	230	{
231	int phoneid;	231	int phoneid;
232		232
233	if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME) {	233	if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME) {
234	phoneid = phone_alloc();	234	phoneid = phone_alloc();
235	if (phoneid < 0) { /* Failed to allocate phone */	235	if (phoneid < 0) { /* Failed to allocate phone */
236	IPC_SET_RETVAL(call->data, ELIMIT);	236	IPC_SET_RETVAL(call->data, ELIMIT);
237	ipc_answer(box,call);	237	ipc_answer(box,call);
238	return -1;	238	return -1;
239	}	239	}
240	IPC_SET_ARG3(call->data, phoneid);	240	IPC_SET_ARG3(call->data, phoneid);
241	}	241	}
242	return 0;	242	return 0;
243	}	243	}
244		244
245	/** Send a call over IPC, wait for reply, return to user	245	/** Send a call over IPC, wait for reply, return to user
246	*	246	*
247	* @return Call identification, returns -1 on fatal error,	247	* @return Call identification, returns -1 on fatal error,
248	-2 on 'Too many async request, handle answers first	248	-2 on 'Too many async request, handle answers first
249	*/	249	*/
250	__native sys_ipc_call_sync_fast(__native phoneid, __native method,	250	__native sys_ipc_call_sync_fast(__native phoneid, __native method,
251	__native arg1, ipc_data_t *data)	251	__native arg1, ipc_data_t *data)
252	{	252	{
253	call_t call;	253	call_t call;
254	phone_t *phone;	254	phone_t *phone;
255	int res;	255	int res;
256		256
257	GET_CHECK_PHONE(phone, phoneid, return ENOENT);	257	GET_CHECK_PHONE(phone, phoneid, return ENOENT);
258		258
259	ipc_call_static_init(&call);	259	ipc_call_static_init(&call);
260	IPC_SET_METHOD(call.data, method);	260	IPC_SET_METHOD(call.data, method);
261	IPC_SET_ARG1(call.data, arg1);	261	IPC_SET_ARG1(call.data, arg1);
262		262
263	if (!(res=request_preprocess(&call))) {	263	if (!(res=request_preprocess(&call))) {
264	ipc_call_sync(phone, &call);	264	ipc_call_sync(phone, &call);
265	process_answer(&call);	265	process_answer(&call);
266	} else	266	} else
267	IPC_SET_RETVAL(call.data, res);	267	IPC_SET_RETVAL(call.data, res);
268	STRUCT_TO_USPACE(&data->args, &call.data.args);	268	STRUCT_TO_USPACE(&data->args, &call.data.args);
269		269
270	return 0;	270	return 0;
271	}	271	}
272		272
273	/** Synchronous IPC call allowing to send whole message */	273	/** Synchronous IPC call allowing to send whole message */
274	__native sys_ipc_call_sync(__native phoneid, ipc_data_t *question,	274	__native sys_ipc_call_sync(__native phoneid, ipc_data_t *question,
275	ipc_data_t *reply)	275	ipc_data_t *reply)
276	{	276	{
277	call_t call;	277	call_t call;
278	phone_t *phone;	278	phone_t *phone;
279	int res;	279	int res;
280	int rc;	280	int rc;
281		281
282	ipc_call_static_init(&call);	282	ipc_call_static_init(&call);
283	rc = copy_from_uspace(&call.data.args, &question->args, sizeof(call.data.args));	283	rc = copy_from_uspace(&call.data.args, &question->args, sizeof(call.data.args));
284	if (rc != 0)	284	if (rc != 0)
285	return (__native) rc;	285	return (__native) rc;
286		286
287	GET_CHECK_PHONE(phone, phoneid, return ENOENT);	287	GET_CHECK_PHONE(phone, phoneid, return ENOENT);
288		288
289	if (!(res=request_preprocess(&call))) {	289	if (!(res=request_preprocess(&call))) {
290	ipc_call_sync(phone, &call);	290	ipc_call_sync(phone, &call);
291	process_answer(&call);	291	process_answer(&call);
292	} else	292	} else
293	IPC_SET_RETVAL(call.data, res);	293	IPC_SET_RETVAL(call.data, res);
294		294
295	rc = STRUCT_TO_USPACE(&reply->args, &call.data.args);	295	rc = STRUCT_TO_USPACE(&reply->args, &call.data.args);
296	if (rc != 0)	296	if (rc != 0)
297	return rc;	297	return rc;
298		298
299	return 0;	299	return 0;
300	}	300	}
301		301
302	/** Check that the task did not exceed allowed limit	302	/** Check that the task did not exceed allowed limit
303	*	303	*
304	* @return 0 - Limit OK, -1 - limit exceeded	304	* @return 0 - Limit OK, -1 - limit exceeded
305	*/	305	*/
306	static int check_call_limit(void)	306	static int check_call_limit(void)
307	{	307	{
308	if (atomic_preinc(&TASK->active_calls) > IPC_MAX_ASYNC_CALLS) {	308	if (atomic_preinc(&TASK->active_calls) > IPC_MAX_ASYNC_CALLS) {
309	atomic_dec(&TASK->active_calls);	309	atomic_dec(&TASK->active_calls);
310	return -1;	310	return -1;
311	}	311	}
312	return 0;	312	return 0;
313	}	313	}
314		314
315	/** Send an asynchronous call over ipc	315	/** Send an asynchronous call over ipc
316	*	316	*
317	* @return Call identification, returns -1 on fatal error,	317	* @return Call identification, returns -1 on fatal error,
318	-2 on 'Too many async request, handle answers first	318	-2 on 'Too many async request, handle answers first
319	*/	319	*/
320	__native sys_ipc_call_async_fast(__native phoneid, __native method,	320	__native sys_ipc_call_async_fast(__native phoneid, __native method,
321	__native arg1, __native arg2)	321	__native arg1, __native arg2)
322	{	322	{
323	call_t *call;	323	call_t *call;
324	phone_t *phone;	324	phone_t *phone;
325	int res;	325	int res;
326		326
327	if (check_call_limit())	327	if (check_call_limit())
328	return IPC_CALLRET_TEMPORARY;	328	return IPC_CALLRET_TEMPORARY;
329		329
330	GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL);	330	GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL);
331		331
332	call = ipc_call_alloc(0);	332	call = ipc_call_alloc(0);
333	IPC_SET_METHOD(call->data, method);	333	IPC_SET_METHOD(call->data, method);
334	IPC_SET_ARG1(call->data, arg1);	334	IPC_SET_ARG1(call->data, arg1);
335	IPC_SET_ARG2(call->data, arg2);	335	IPC_SET_ARG2(call->data, arg2);
336		336
337	if (!(res=request_preprocess(call)))	337	if (!(res=request_preprocess(call)))
338	ipc_call(phone, call);	338	ipc_call(phone, call);
339	else	339	else
340	ipc_backsend_err(phone, call, res);	340	ipc_backsend_err(phone, call, res);
341		341
342	return (__native) call;	342	return (__native) call;
343	}	343	}
344		344
345	/** Synchronous IPC call allowing to send whole message	345	/** Synchronous IPC call allowing to send whole message
346	*	346	*
347	* @return The same as sys_ipc_call_async	347	* @return The same as sys_ipc_call_async
348	*/	348	*/
349	__native sys_ipc_call_async(__native phoneid, ipc_data_t *data)	349	__native sys_ipc_call_async(__native phoneid, ipc_data_t *data)
350	{	350	{
351	call_t *call;	351	call_t *call;
352	phone_t *phone;	352	phone_t *phone;
353	int res;	353	int res;
354	int rc;	354	int rc;
355		355
356	if (check_call_limit())	356	if (check_call_limit())
357	return IPC_CALLRET_TEMPORARY;	357	return IPC_CALLRET_TEMPORARY;
358		358
359	GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL);	359	GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL);
360		360
361	call = ipc_call_alloc(0);	361	call = ipc_call_alloc(0);
362	rc = copy_from_uspace(&call->data.args, &data->args, sizeof(call->data.args));	362	rc = copy_from_uspace(&call->data.args, &data->args, sizeof(call->data.args));
363	if (rc != 0) {	363	if (rc != 0) {
364	ipc_call_free(call);	364	ipc_call_free(call);
365	return (__native) rc;	365	return (__native) rc;
366	}	366	}
367	if (!(res=request_preprocess(call)))	367	if (!(res=request_preprocess(call)))
368	ipc_call(phone, call);	368	ipc_call(phone, call);
369	else	369	else
370	ipc_backsend_err(phone, call, res);	370	ipc_backsend_err(phone, call, res);
371		371
372	return (__native) call;	372	return (__native) call;
373	}	373	}
374		374
375	/** Forward received call to another destination	375	/** Forward received call to another destination
376	*	376	*
377	* The arg1 and arg2 are changed in the forwarded message	377	* The arg1 and arg2 are changed in the forwarded message
378	*	378	*
379	* Warning: If implementing non-fast version, make sure that	379	* Warning: If implementing non-fast version, make sure that
380	* arg3 is not rewritten for certain system IPC	380	* arg3 is not rewritten for certain system IPC
381	*/	381	*/
382	__native sys_ipc_forward_fast(__native callid, __native phoneid,	382	__native sys_ipc_forward_fast(__native callid, __native phoneid,
383	__native method, __native arg1)	383	__native method, __native arg1)
384	{	384	{
385	call_t *call;	385	call_t *call;
386	phone_t *phone;	386	phone_t *phone;
387		387
388	call = get_call(callid);	388	call = get_call(callid);
389	if (!call)	389	if (!call)
390	return ENOENT;	390	return ENOENT;
391		391
392	call->flags \|= IPC_CALL_FORWARDED;	392	call->flags \|= IPC_CALL_FORWARDED;
393		393
394	GET_CHECK_PHONE(phone, phoneid, {	394	GET_CHECK_PHONE(phone, phoneid, {
395	IPC_SET_RETVAL(call->data, EFORWARD);	395	IPC_SET_RETVAL(call->data, EFORWARD);
396	ipc_answer(&TASK->answerbox, call);	396	ipc_answer(&TASK->answerbox, call);
397	return ENOENT;	397	return ENOENT;
398	});	398	});
399		399
400	if (!is_forwardable(IPC_GET_METHOD(call->data))) {	400	if (!is_forwardable(IPC_GET_METHOD(call->data))) {
401	IPC_SET_RETVAL(call->data, EFORWARD);	401	IPC_SET_RETVAL(call->data, EFORWARD);
402	ipc_answer(&TASK->answerbox, call);	402	ipc_answer(&TASK->answerbox, call);
403	return EPERM;	403	return EPERM;
404	}	404	}
405		405
406	/* Userspace is not allowed to change method of system methods	406	/* Userspace is not allowed to change method of system methods
407	* on forward, allow changing ARG1 and ARG2 by means of method and arg1	407	* on forward, allow changing ARG1 and ARG2 by means of method and arg1
408	*/	408	*/
409	if (is_system_method(IPC_GET_METHOD(call->data))) {	409	if (is_system_method(IPC_GET_METHOD(call->data))) {
410	if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME)	410	if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME)
411	phone_dealloc(IPC_GET_ARG3(call->data));	411	phone_dealloc(IPC_GET_ARG3(call->data));
412		412
413	IPC_SET_ARG1(call->data, method);	413	IPC_SET_ARG1(call->data, method);
414	IPC_SET_ARG2(call->data, arg1);	414	IPC_SET_ARG2(call->data, arg1);
415	} else {	415	} else {
416	IPC_SET_METHOD(call->data, method);	416	IPC_SET_METHOD(call->data, method);
417	IPC_SET_ARG1(call->data, arg1);	417	IPC_SET_ARG1(call->data, arg1);
418	}	418	}
419		419
420	return ipc_forward(call, phone, &TASK->answerbox);	420	return ipc_forward(call, phone, &TASK->answerbox);
421	}	421	}
422		422
423	/** Send IPC answer */	423	/** Send IPC answer */
424	__native sys_ipc_answer_fast(__native callid, __native retval,	424	__native sys_ipc_answer_fast(__native callid, __native retval,
425	__native arg1, __native arg2)	425	__native arg1, __native arg2)
426	{	426	{
427	call_t *call;	427	call_t *call;
428	ipc_data_t saved_data;	428	ipc_data_t saved_data;
429	int saveddata = 0;	429	int saveddata = 0;
430	int rc;	430	int rc;
431		431
432	/* Do not answer notification callids */	432	/* Do not answer notification callids */
433	if (callid & IPC_CALLID_NOTIFICATION)	433	if (callid & IPC_CALLID_NOTIFICATION)
434	return 0;	434	return 0;
435		435
436	call = get_call(callid);	436	call = get_call(callid);
437	if (!call)	437	if (!call)
438	return ENOENT;	438	return ENOENT;
439		439
440	if (answer_need_old(call)) {	440	if (answer_need_old(call)) {
441	memcpy(&saved_data, &call->data, sizeof(call->data));	441	memcpy(&saved_data, &call->data, sizeof(call->data));
442	saveddata = 1;	442	saveddata = 1;
443	}	443	}
444		444
445	IPC_SET_RETVAL(call->data, retval);	445	IPC_SET_RETVAL(call->data, retval);
446	IPC_SET_ARG1(call->data, arg1);	446	IPC_SET_ARG1(call->data, arg1);
447	IPC_SET_ARG2(call->data, arg2);	447	IPC_SET_ARG2(call->data, arg2);
448	rc = answer_preprocess(call, saveddata ? &saved_data : NULL);	448	rc = answer_preprocess(call, saveddata ? &saved_data : NULL);
449		449
450	ipc_answer(&TASK->answerbox, call);	450	ipc_answer(&TASK->answerbox, call);
451	return rc;	451	return rc;
452	}	452	}
453		453
454	/** Send IPC answer */	454	/** Send IPC answer */
455	__native sys_ipc_answer(__native callid, ipc_data_t *data)	455	__native sys_ipc_answer(__native callid, ipc_data_t *data)
456	{	456	{
457	call_t *call;	457	call_t *call;
458	ipc_data_t saved_data;	458	ipc_data_t saved_data;
459	int saveddata = 0;	459	int saveddata = 0;
460	int rc;	460	int rc;
461		461
462	/* Do not answer notification callids */	462	/* Do not answer notification callids */
463	if (callid & IPC_CALLID_NOTIFICATION)	463	if (callid & IPC_CALLID_NOTIFICATION)
464	return 0;	464	return 0;
465		465
466	call = get_call(callid);	466	call = get_call(callid);
467	if (!call)	467	if (!call)
468	return ENOENT;	468	return ENOENT;
469		469
470	if (answer_need_old(call)) {	470	if (answer_need_old(call)) {
471	memcpy(&saved_data, &call->data, sizeof(call->data));	471	memcpy(&saved_data, &call->data, sizeof(call->data));
472	saveddata = 1;	472	saveddata = 1;
473	}	473	}
474	rc = copy_from_uspace(&call->data.args, &data->args,	474	rc = copy_from_uspace(&call->data.args, &data->args,
475	sizeof(call->data.args));	475	sizeof(call->data.args));
476	if (rc != 0)	476	if (rc != 0)
477	return rc;	477	return rc;
478		478
479	rc = answer_preprocess(call, saveddata ? &saved_data : NULL);	479	rc = answer_preprocess(call, saveddata ? &saved_data : NULL);
480		480
481	ipc_answer(&TASK->answerbox, call);	481	ipc_answer(&TASK->answerbox, call);
482		482
483	return rc;	483	return rc;
484	}	484	}
485		485
486	/** Hang up the phone	486	/** Hang up the phone
487	*	487	*
488	*/	488	*/
489	__native sys_ipc_hangup(int phoneid)	489	__native sys_ipc_hangup(int phoneid)
490	{	490	{
491	phone_t *phone;	491	phone_t *phone;
492		492
493	GET_CHECK_PHONE(phone, phoneid, return ENOENT);	493	GET_CHECK_PHONE(phone, phoneid, return ENOENT);
494		494
495	if (ipc_phone_hangup(phone))	495	if (ipc_phone_hangup(phone, 0))
496	return -1;	496	return -1;
497		497
498	return 0;	498	return 0;
499	}	499	}
500		500

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/generic/src/ipc/sysipc.c @ 1428 – Rev 1502 → 1568