WebSVN – HelenOS – Diff – /trunk/uspace/srv/vfs/vfs.c


/*
 * Copyright (c) 2007 Jakub Jermar
 * 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.
 */
 
/** @addtogroup fs
 * @{
 */
 
/**
 * @file    vfs.c
 * @brief   VFS service for HelenOS.
 */
 
#include <ipc/ipc.h>
#include <ipc/services.h>
#include <async.h>
#include <errno.h>
#include <stdio.h>
#include <bool.h>
#include <string.h>
#include <as.h>
#include <libadt/list.h>
#include <atomic.h>
#include "vfs.h"
 
#define dprintf(...)    printf(__VA_ARGS__)
 
static void vfs_connection(ipc_callid_t iid, ipc_call_t *icall)
{
    bool keep_on_going = 1;
 
    printf("Connection opened from %p\n", icall->in_phone_hash);
 
    /*
     * The connection was opened via the IPC_CONNECT_ME_TO call.
     * This call needs to be answered.
     */
    ipc_answer_fast(iid, EOK, 0, 0);
 
    /*
     * Here we enter the main connection fibril loop.
     * The logic behind this loop and the protocol is that we'd like to keep
     * each connection open for a while before we close it. The benefit of
     * this is that the client doesn't have to establish a new connection
     * upon each request.  On the other hand, the client must be ready to
     * re-establish a connection if we hang it up due to reaching of maximum
     * number of requests per connection or due to the client timing out.
     */
     
    while (keep_on_going) {
        ipc_callid_t callid;
        ipc_call_t call;
 
        callid = async_get_call(&call);
 
        printf("Received call, method=%d\n", IPC_GET_METHOD(call));
       
        switch (IPC_GET_METHOD(call)) {
        case IPC_M_PHONE_HUNGUP:
            keep_on_going = false;
            break;
        case VFS_REGISTER:
            vfs_register(callid, &call);
            keep_on_going = false;
            break;
        case VFS_MOUNT:
        case VFS_UNMOUNT:
        case VFS_OPEN:
        case VFS_CREATE:
        case VFS_CLOSE:
        case VFS_READ:
        case VFS_WRITE:
        case VFS_SEEK:
        default:
            ipc_answer_fast(callid, ENOTSUP, 0, 0);
            break;
        }
    }
 
    /* TODO: cleanup after the client */
   
}
 
int main(int argc, char **argv)
{
    ipcarg_t phonead;
 
    printf("VFS: HelenOS VFS server\n");
 
    /*
     * Initialize the list of registered file systems.
     */
    list_initialize(&fs_head);
 
    /*
     * Allocate and initialize the Path Lookup Buffer.
     */
    list_initialize(&plb_head);
    plb = as_get_mappable_page(PLB_SIZE);
    if (!plb) {
        printf("Cannot allocate a mappable piece of address space\n");
        return ENOMEM;
    }
    if (as_area_create(plb, PLB_SIZE, AS_AREA_READ | AS_AREA_WRITE |
        AS_AREA_CACHEABLE) != plb) {
        printf("Cannot create address space area.\n");
        return ENOMEM;
    }
    memset(plb, 0, PLB_SIZE);
   
    /*
     * Set a connectio handling function/fibril.
     */
    async_set_client_connection(vfs_connection);
 
    /*
     * Register at the naming service.
     */
    ipc_connect_to_me(PHONE_NS, SERVICE_VFS, 0, &phonead);
 
    /*
     * Start accepting connections.
     */
    async_manager();
    return 0;
}
 
/**
 * @}
 */
 

Rev 2543	Rev 2552
1	/*	1	/*
2	* Copyright (c) 2007 Jakub Jermar	2	* Copyright (c) 2007 Jakub Jermar
3	* All rights reserved.	3	* All rights reserved.
4	*	4	*
5	* Redistribution and use in source and binary forms, with or without	5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions	6	* modification, are permitted provided that the following conditions
7	* are met:	7	* are met:
8	*	8	*
9	* - Redistributions of source code must retain the above copyright	9	* - Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.	10	* notice, this list of conditions and the following disclaimer.
11	* - Redistributions in binary form must reproduce the above copyright	11	* - Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the	12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.	13	* documentation and/or other materials provided with the distribution.
14	* - The name of the author may not be used to endorse or promote products	14	* - The name of the author may not be used to endorse or promote products
15	* derived from this software without specific prior written permission.	15	* derived from this software without specific prior written permission.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	*/	27	*/
28		28
29	/** @addtogroup fs	29	/** @addtogroup fs
30	* @{	30	* @{
31	*/	31	*/
32		32
33	/**	33	/**
34	* @file vfs.c	34	* @file vfs.c
35	* @brief VFS service for HelenOS.	35	* @brief VFS service for HelenOS.
36	*/	36	*/
37		37
38	#include <ipc/ipc.h>	38	#include <ipc/ipc.h>
39	#include <ipc/services.h>	39	#include <ipc/services.h>
40	#include <async.h>	40	#include <async.h>
41	#include <errno.h>	41	#include <errno.h>
42	#include <stdio.h>	42	#include <stdio.h>
43	#include <bool.h>	43	#include <bool.h>
44	#include <string.h>	44	#include <string.h>
45	#include <as.h>	45	#include <as.h>
46	#include <libadt/list.h>	46	#include <libadt/list.h>
-		47	#include <atomic.h>
47	#include "vfs.h"	48	#include "vfs.h"
48		49
49	#define dprintf(...) printf(__VA_ARGS__)	50	#define dprintf(...) printf(__VA_ARGS__)
50		51
51	static void vfs_connection(ipc_callid_t iid, ipc_call_t *icall)	52	static void vfs_connection(ipc_callid_t iid, ipc_call_t *icall)
52	{	53	{
53	bool keep_on_going = 1;	54	bool keep_on_going = 1;
54		55
55	printf("Connection opened from %p\n", icall->in_phone_hash);	56	printf("Connection opened from %p\n", icall->in_phone_hash);
56		57
57	/*	58	/*
58	* The connection was opened via the IPC_CONNECT_ME_TO call.	59	* The connection was opened via the IPC_CONNECT_ME_TO call.
59	* This call needs to be answered.	60	* This call needs to be answered.
60	*/	61	*/
61	ipc_answer_fast(iid, EOK, 0, 0);	62	ipc_answer_fast(iid, EOK, 0, 0);
62		63
63	/*	64	/*
64	* Here we enter the main connection fibril loop.	65	* Here we enter the main connection fibril loop.
65	* The logic behind this loop and the protocol is that we'd like to keep	66	* The logic behind this loop and the protocol is that we'd like to keep
66	* each connection open for a while before we close it. The benefit of	67	* each connection open for a while before we close it. The benefit of
67	* this is that the client doesn't have to establish a new connection	68	* this is that the client doesn't have to establish a new connection
68	* upon each request. On the other hand, the client must be ready to	69	* upon each request. On the other hand, the client must be ready to
69	* re-establish a connection if we hang it up due to reaching of maximum	70	* re-establish a connection if we hang it up due to reaching of maximum
70	* number of requests per connection or due to the client timing out.	71	* number of requests per connection or due to the client timing out.
71	*/	72	*/
72		73
73	while (keep_on_going) {	74	while (keep_on_going) {
74	ipc_callid_t callid;	75	ipc_callid_t callid;
75	ipc_call_t call;	76	ipc_call_t call;
76		77
77	callid = async_get_call(&call);	78	callid = async_get_call(&call);
78		79
79	printf("Received call, method=%d\n", IPC_GET_METHOD(call));	80	printf("Received call, method=%d\n", IPC_GET_METHOD(call));
80		81
81	switch (IPC_GET_METHOD(call)) {	82	switch (IPC_GET_METHOD(call)) {
82	case IPC_M_PHONE_HUNGUP:	83	case IPC_M_PHONE_HUNGUP:
83	keep_on_going = false;	84	keep_on_going = false;
84	break;	85	break;
85	case VFS_REGISTER:	86	case VFS_REGISTER:
86	vfs_register(callid, &call);	87	vfs_register(callid, &call);
87	keep_on_going = false;	88	keep_on_going = false;
88	break;	89	break;
89	case VFS_MOUNT:	90	case VFS_MOUNT:
90	case VFS_UNMOUNT:	91	case VFS_UNMOUNT:
91	case VFS_OPEN:	92	case VFS_OPEN:
92	case VFS_CREATE:	93	case VFS_CREATE:
93	case VFS_CLOSE:	94	case VFS_CLOSE:
94	case VFS_READ:	95	case VFS_READ:
95	case VFS_WRITE:	96	case VFS_WRITE:
96	case VFS_SEEK:	97	case VFS_SEEK:
97	default:	98	default:
98	ipc_answer_fast(callid, ENOTSUP, 0, 0);	99	ipc_answer_fast(callid, ENOTSUP, 0, 0);
99	break;	100	break;
100	}	101	}
101	}	102	}
102		103
103	/* TODO: cleanup after the client */	104	/* TODO: cleanup after the client */
104		105
105	}	106	}
106		107
107	int main(int argc, char **argv)	108	int main(int argc, char **argv)
108	{	109	{
109	ipcarg_t phonead;	110	ipcarg_t phonead;
110		111
111	printf("VFS: HelenOS VFS server\n");	112	printf("VFS: HelenOS VFS server\n");
112		113
113	/*	114	/*
114	* Initialize the list of registered file systems.	115	* Initialize the list of registered file systems.
115	*/	116	*/
116	list_initialize(&fs_head);	117	list_initialize(&fs_head);
117		118
118	/*	119	/*
119	* Allocate and initialize the Path Lookup Buffer.	120	* Allocate and initialize the Path Lookup Buffer.
120	*/	121	*/
121	list_initialize(&plb_head);	122	list_initialize(&plb_head);
122	plb = as_get_mappable_page(PLB_SIZE);	123	plb = as_get_mappable_page(PLB_SIZE);
123	if (!plb) {	124	if (!plb) {
124	printf("Cannot allocate a mappable piece of address space\n");	125	printf("Cannot allocate a mappable piece of address space\n");
125	return ENOMEM;	126	return ENOMEM;
126	}	127	}
127	if (as_area_create(plb, PLB_SIZE, AS_AREA_READ \| AS_AREA_WRITE \|	128	if (as_area_create(plb, PLB_SIZE, AS_AREA_READ \| AS_AREA_WRITE \|
128	AS_AREA_CACHEABLE) != plb) {	129	AS_AREA_CACHEABLE) != plb) {
129	printf("Cannot create address space area.\n");	130	printf("Cannot create address space area.\n");
130	return ENOMEM;	131	return ENOMEM;
131	}	132	}
132	memset(plb, 0, PLB_SIZE);	133	memset(plb, 0, PLB_SIZE);
133		134
134	/*	135	/*
135	* Set a connectio handling function/fibril.	136	* Set a connectio handling function/fibril.
136	*/	137	*/
137	async_set_client_connection(vfs_connection);	138	async_set_client_connection(vfs_connection);
138		139
139	/*	140	/*
140	* Register at the naming service.	141	* Register at the naming service.
141	*/	142	*/
142	ipc_connect_to_me(PHONE_NS, SERVICE_VFS, 0, &phonead);	143	ipc_connect_to_me(PHONE_NS, SERVICE_VFS, 0, &phonead);
143		144
144	/*	145	/*
145	* Start accepting connections.	146	* Start accepting connections.
146	*/	147	*/
147	async_manager();	148	async_manager();
148	return 0;	149	return 0;
149	}	150	}
150		151
151	/**	152	/**
152	* @}	153	* @}
153	*/	154	*/
154		155

Subversion Repositories HelenOS

(root)/trunk/uspace/srv/vfs/vfs.c @ 3849 – Rev 2543 → 2552