WebSVN – HelenOS – Diff – /branches/dd/uspace/lib/libc/generic/vfs/vfs.c


/*
 * Copyright (c) 2008 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 libc
 * @{
 */
/** @file
 */
 
#include <vfs.h>
#include <unistd.h>
#include <fcntl.h>
#include <ipc/ipc.h>
#include <ipc/services.h>
#include <async.h>
#include <atomic.h>
#include <futex.h>
#include <errno.h>
#include <string.h>
#include "../../srv/vfs/vfs.h"
 
int vfs_phone = -1;
atomic_t vfs_phone_futex = FUTEX_INITIALIZER;
 
static int vfs_connect(void)
{
    if (vfs_phone < 0)
        vfs_phone = ipc_connect_me_to(PHONE_NS, SERVICE_VFS, 0, 0);
    return vfs_phone;
}
 
int mount(const char *fs_name, const char *mp, const char *dev)
{
    int res;
    ipcarg_t rc;
    aid_t req;
 
    int dev_handle = 0; /* TODO */
 
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    if (vfs_phone < 0) {
        res = vfs_connect();
        if (res < 0) {
            async_serialize_end();
            futex_up(&vfs_phone_futex);
            return res;
        }
    }
    req = async_send_1(vfs_phone, VFS_MOUNT, dev_handle, NULL);
    rc = ipc_data_write_start(vfs_phone, (void *)fs_name, strlen(fs_name));
    if (rc != EOK) {
        async_wait_for(req, NULL);
        async_serialize_end();
        futex_up(&vfs_phone_futex);
        return (int) rc;
    }
    rc = ipc_data_write_start(vfs_phone, (void *)mp, strlen(mp));
    if (rc != EOK) {
        async_wait_for(req, NULL);
        async_serialize_end();
        futex_up(&vfs_phone_futex);
        return (int) rc;
    }
    async_wait_for(req, &rc);
    async_serialize_end();
    futex_up(&vfs_phone_futex);
    return (int) rc;
}
 
 
int open(const char *name, int oflag, ...)
{
    int res;
    ipcarg_t rc;
    ipc_call_t answer;
    aid_t req;
   
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    if (vfs_phone < 0) {
        res = vfs_connect();
        if (res < 0) {
            async_serialize_end();
            futex_up(&vfs_phone_futex);
            return res;
        }
    }
    req = async_send_2(vfs_phone, VFS_OPEN, oflag, 0, &answer);
    rc = ipc_data_write_start(vfs_phone, name, strlen(name));
    if (rc != EOK) {
        async_wait_for(req, NULL);
        async_serialize_end();
        futex_up(&vfs_phone_futex);
        return (int) rc;
    }
    async_wait_for(req, &rc);
    async_serialize_end();
    futex_up(&vfs_phone_futex);
    return (int) IPC_GET_ARG1(answer);
}
 
ssize_t read(int fildes, void *buf, size_t nbyte)
{
    int res;
    ipcarg_t rc;
    ipc_call_t answer;
    aid_t req;
 
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    if (vfs_phone < 0) {
        res = vfs_connect();
        if (res < 0) {
            async_serialize_end();
            futex_up(&vfs_phone_futex);
            return res;
        }
    }
    req = async_send_1(vfs_phone, VFS_READ, fildes, &answer);
    if (ipc_data_read_start(vfs_phone, (void *)buf, nbyte) != EOK) {
        async_wait_for(req, NULL);
        async_serialize_end();
        futex_up(&vfs_phone_futex);
        return (ssize_t) rc;
    }
    async_wait_for(req, &rc);
    async_serialize_end();
    futex_up(&vfs_phone_futex);
    return (ssize_t) IPC_GET_ARG1(answer);
}
 
ssize_t write(int fildes, const void *buf, size_t nbyte)
{
    int res;
    ipcarg_t rc;
    ipc_call_t answer;
    aid_t req;
 
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    if (vfs_phone < 0) {
        res = vfs_connect();
        if (res < 0) {
            async_serialize_end();
            futex_up(&vfs_phone_futex);
            return res;
        }
    }
    req = async_send_1(vfs_phone, VFS_WRITE, fildes, &answer);
    if (ipc_data_write_start(vfs_phone, (void *)buf, nbyte) != EOK) {
        async_wait_for(req, NULL);
        async_serialize_end();
        futex_up(&vfs_phone_futex);
        return (ssize_t) rc;
    }
    async_wait_for(req, &rc);
    async_serialize_end();
    futex_up(&vfs_phone_futex);
    return (ssize_t) IPC_GET_ARG1(answer);
}
 
off_t lseek(int fildes, off_t offset, int whence)
{
    int res;
    ipcarg_t rc;
 
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    if (vfs_phone < 0) {
        res = vfs_connect();
        if (res < 0) {
            async_serialize_end();
            futex_up(&vfs_phone_futex);
            return res;
        }
    }
       
    off_t newoffs;
    rc = async_req_3_1(vfs_phone, VFS_SEEK, fildes, offset, whence,
        &newoffs);
 
    async_serialize_end();
    futex_up(&vfs_phone_futex);
 
    if (rc != EOK)
        return (off_t) -1;
   
    return newoffs;
}
 
/** @}
 */
 

Rev 2678	Rev 2684
1	/*	1	/*
2	* Copyright (c) 2007 Jakub Jermar	2	* Copyright (c) 2008 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 libc	29	/** @addtogroup libc
30	* @{	30	* @{
31	*/	31	*/
32	/** @file	32	/** @file
33	*/	33	*/
34		34
35	#include <vfs.h>	35	#include <vfs.h>
36	#include <unistd.h>	36	#include <unistd.h>
37	#include <fcntl.h>	37	#include <fcntl.h>
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 <atomic.h>	41	#include <atomic.h>
42	#include <futex.h>	42	#include <futex.h>
43	#include <errno.h>	43	#include <errno.h>
44	#include <string.h>	44	#include <string.h>
45	#include "../../srv/vfs/vfs.h"	45	#include "../../srv/vfs/vfs.h"
46		46
47	int vfs_phone = -1;	47	int vfs_phone = -1;
48	atomic_t vfs_phone_futex = FUTEX_INITIALIZER;	48	atomic_t vfs_phone_futex = FUTEX_INITIALIZER;
49		49
50	static int vfs_connect(void)	50	static int vfs_connect(void)
51	{	51	{
52	if (vfs_phone < 0)	52	if (vfs_phone < 0)
53	vfs_phone = ipc_connect_me_to(PHONE_NS, SERVICE_VFS, 0, 0);	53	vfs_phone = ipc_connect_me_to(PHONE_NS, SERVICE_VFS, 0, 0);
54	return vfs_phone;	54	return vfs_phone;
55	}	55	}
56		56
57	int mount(const char fs_name, const char mp, const char *dev)	57	int mount(const char fs_name, const char mp, const char *dev)
58	{	58	{
59	int res;	59	int res;
60	ipcarg_t rc;	60	ipcarg_t rc;
61	aid_t req;	61	aid_t req;
62		62
63	int dev_handle = 0; /* TODO */	63	int dev_handle = 0; /* TODO */
64		64
65	futex_down(&vfs_phone_futex);	65	futex_down(&vfs_phone_futex);
66	async_serialize_start();	66	async_serialize_start();
67	if (vfs_phone < 0) {	67	if (vfs_phone < 0) {
68	res = vfs_connect();	68	res = vfs_connect();
69	if (res < 0) {	69	if (res < 0) {
70	async_serialize_end();	70	async_serialize_end();
71	futex_up(&vfs_phone_futex);	71	futex_up(&vfs_phone_futex);
72	return res;	72	return res;
73	}	73	}
74	}	74	}
75	req = async_send_1(vfs_phone, VFS_MOUNT, dev_handle, NULL);	75	req = async_send_1(vfs_phone, VFS_MOUNT, dev_handle, NULL);
76	rc = ipc_data_write_start(vfs_phone, (void *)fs_name, strlen(fs_name));	76	rc = ipc_data_write_start(vfs_phone, (void *)fs_name, strlen(fs_name));
77	if (rc != EOK) {	77	if (rc != EOK) {
78	async_wait_for(req, NULL);	78	async_wait_for(req, NULL);
79	async_serialize_end();	79	async_serialize_end();
80	futex_up(&vfs_phone_futex);	80	futex_up(&vfs_phone_futex);
81	return (int) rc;	81	return (int) rc;
82	}	82	}
83	rc = ipc_data_write_start(vfs_phone, (void *)mp, strlen(mp));	83	rc = ipc_data_write_start(vfs_phone, (void *)mp, strlen(mp));
84	if (rc != EOK) {	84	if (rc != EOK) {
85	async_wait_for(req, NULL);	85	async_wait_for(req, NULL);
86	async_serialize_end();	86	async_serialize_end();
87	futex_up(&vfs_phone_futex);	87	futex_up(&vfs_phone_futex);
88	return (int) rc;	88	return (int) rc;
89	}	89	}
90	async_wait_for(req, &rc);	90	async_wait_for(req, &rc);
91	async_serialize_end();	91	async_serialize_end();
92	futex_up(&vfs_phone_futex);	92	futex_up(&vfs_phone_futex);
93	return (int) rc;	93	return (int) rc;
94	}	94	}
95		95
96		96
97	int open(const char *name, int oflag, ...)	97	int open(const char *name, int oflag, ...)
98	{	98	{
99	int res;	99	int res;
100	ipcarg_t rc;	100	ipcarg_t rc;
101	ipc_call_t answer;	101	ipc_call_t answer;
102	aid_t req;	102	aid_t req;
103		103
104	futex_down(&vfs_phone_futex);	104	futex_down(&vfs_phone_futex);
105	async_serialize_start();	105	async_serialize_start();
106	if (vfs_phone < 0) {	106	if (vfs_phone < 0) {
107	res = vfs_connect();	107	res = vfs_connect();
108	if (res < 0) {	108	if (res < 0) {
109	async_serialize_end();	109	async_serialize_end();
110	futex_up(&vfs_phone_futex);	110	futex_up(&vfs_phone_futex);
111	return res;	111	return res;
112	}	112	}
113	}	113	}
114	req = async_send_2(vfs_phone, VFS_OPEN, oflag, 0, &answer);	114	req = async_send_2(vfs_phone, VFS_OPEN, oflag, 0, &answer);
115	rc = ipc_data_write_start(vfs_phone, name, strlen(name));	115	rc = ipc_data_write_start(vfs_phone, name, strlen(name));
116	if (rc != EOK) {	116	if (rc != EOK) {
117	async_wait_for(req, NULL);	117	async_wait_for(req, NULL);
118	async_serialize_end();	118	async_serialize_end();
119	futex_up(&vfs_phone_futex);	119	futex_up(&vfs_phone_futex);
120	return (int) rc;	120	return (int) rc;
121	}	121	}
122	async_wait_for(req, &rc);	122	async_wait_for(req, &rc);
123	async_serialize_end();	123	async_serialize_end();
124	futex_up(&vfs_phone_futex);	124	futex_up(&vfs_phone_futex);
125	return (int) IPC_GET_ARG1(answer);	125	return (int) IPC_GET_ARG1(answer);
126	}	126	}
127		127
128	ssize_t read(int fildes, void *buf, size_t nbyte)	128	ssize_t read(int fildes, void *buf, size_t nbyte)
129	{	129	{
130	int res;	130	int res;
131	ipcarg_t rc;	131	ipcarg_t rc;
132	ipc_call_t answer;	132	ipc_call_t answer;
133	aid_t req;	133	aid_t req;
134		134
135	futex_down(&vfs_phone_futex);	135	futex_down(&vfs_phone_futex);
136	async_serialize_start();	136	async_serialize_start();
137	if (vfs_phone < 0) {	137	if (vfs_phone < 0) {
138	res = vfs_connect();	138	res = vfs_connect();
139	if (res < 0) {	139	if (res < 0) {
140	async_serialize_end();	140	async_serialize_end();
141	futex_up(&vfs_phone_futex);	141	futex_up(&vfs_phone_futex);
142	return res;	142	return res;
143	}	143	}
144	}	144	}
145	req = async_send_1(vfs_phone, VFS_READ, fildes, &answer);	145	req = async_send_1(vfs_phone, VFS_READ, fildes, &answer);
146	if (ipc_data_read_start(vfs_phone, (void *)buf, nbyte) != EOK) {	146	if (ipc_data_read_start(vfs_phone, (void *)buf, nbyte) != EOK) {
147	async_wait_for(req, NULL);	147	async_wait_for(req, NULL);
148	async_serialize_end();	148	async_serialize_end();
149	futex_up(&vfs_phone_futex);	149	futex_up(&vfs_phone_futex);
150	return (ssize_t) rc;	150	return (ssize_t) rc;
151	}	151	}
152	async_wait_for(req, &rc);	152	async_wait_for(req, &rc);
153	async_serialize_end();	153	async_serialize_end();
154	futex_up(&vfs_phone_futex);	154	futex_up(&vfs_phone_futex);
155	return (ssize_t) IPC_GET_ARG1(answer);	155	return (ssize_t) IPC_GET_ARG1(answer);
156	}	156	}
157		157
158	ssize_t write(int fildes, const void *buf, size_t nbyte)	158	ssize_t write(int fildes, const void *buf, size_t nbyte)
159	{	159	{
160	int res;	160	int res;
161	ipcarg_t rc;	161	ipcarg_t rc;
162	ipc_call_t answer;	162	ipc_call_t answer;
163	aid_t req;	163	aid_t req;
164		164
165	futex_down(&vfs_phone_futex);	165	futex_down(&vfs_phone_futex);
166	async_serialize_start();	166	async_serialize_start();
167	if (vfs_phone < 0) {	167	if (vfs_phone < 0) {
168	res = vfs_connect();	168	res = vfs_connect();
169	if (res < 0) {	169	if (res < 0) {
170	async_serialize_end();	170	async_serialize_end();
171	futex_up(&vfs_phone_futex);	171	futex_up(&vfs_phone_futex);
172	return res;	172	return res;
173	}	173	}
174	}	174	}
175	req = async_send_1(vfs_phone, VFS_WRITE, fildes, &answer);	175	req = async_send_1(vfs_phone, VFS_WRITE, fildes, &answer);
176	if (ipc_data_write_start(vfs_phone, (void *)buf, nbyte) != EOK) {	176	if (ipc_data_write_start(vfs_phone, (void *)buf, nbyte) != EOK) {
177	async_wait_for(req, NULL);	177	async_wait_for(req, NULL);
178	async_serialize_end();	178	async_serialize_end();
179	futex_up(&vfs_phone_futex);	179	futex_up(&vfs_phone_futex);
180	return (ssize_t) rc;	180	return (ssize_t) rc;
181	}	181	}
182	async_wait_for(req, &rc);	182	async_wait_for(req, &rc);
183	async_serialize_end();	183	async_serialize_end();
184	futex_up(&vfs_phone_futex);	184	futex_up(&vfs_phone_futex);
185	return (ssize_t) IPC_GET_ARG1(answer);	185	return (ssize_t) IPC_GET_ARG1(answer);
186	}	186	}
-		187
-		188	off_t lseek(int fildes, off_t offset, int whence)
-		189	{
-		190	int res;
-		191	ipcarg_t rc;
-		192
-		193	futex_down(&vfs_phone_futex);
-		194	async_serialize_start();
-		195	if (vfs_phone < 0) {
-		196	res = vfs_connect();
-		197	if (res < 0) {
-		198	async_serialize_end();
-		199	futex_up(&vfs_phone_futex);
-		200	return res;
-		201	}
-		202	}
-		203
-		204	off_t newoffs;
-		205	rc = async_req_3_1(vfs_phone, VFS_SEEK, fildes, offset, whence,
-		206	&newoffs);
-		207
-		208	async_serialize_end();
-		209	futex_up(&vfs_phone_futex);
-		210
-		211	if (rc != EOK)
-		212	return (off_t) -1;
-		213
-		214	return newoffs;
-		215	}
-		216
187	/** @}	217	/** @}
188	*/	218	*/
189		219

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(root)/branches/dd/uspace/lib/libc/generic/vfs/vfs.c @ 4688 – Rev 2678 → 2684