WebSVN – HelenOS – Diff – /trunk/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/vfs.h>
#include <vfs/canonify.h>
#include <stdlib.h>
#include <unistd.h>
#include <dirent.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <stdio.h>
#include <sys/types.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 <devmap.h>
#include "../../../srv/vfs/vfs.h"
 
int vfs_phone = -1;
futex_t vfs_phone_futex = FUTEX_INITIALIZER;
 
futex_t cwd_futex = FUTEX_INITIALIZER;
DIR *cwd_dir = NULL;
char *cwd_path = NULL;
size_t cwd_size = 0;
 
char *absolutize(const char *path, size_t *retlen)
{
    char *ncwd_path;
    char *ncwd_path_nc;
 
    futex_down(&cwd_futex);
    size_t size = str_size(path);
    if (*path != '/') {
        if (!cwd_path) {
            futex_up(&cwd_futex);
            return NULL;
        }
        ncwd_path_nc = malloc(cwd_size + 1 + size + 1);
        if (!ncwd_path_nc) {
            futex_up(&cwd_futex);
            return NULL;
        }
        str_cpy(ncwd_path_nc, cwd_size + 1 + size + 1, cwd_path);
        ncwd_path_nc[cwd_size] = '/';
        ncwd_path_nc[cwd_size + 1] = '\0';
    } else {
        ncwd_path_nc = malloc(size + 1);
        if (!ncwd_path_nc) {
            futex_up(&cwd_futex);
            return NULL;
        }
        ncwd_path_nc[0] = '\0';
    }
    str_append(ncwd_path_nc, cwd_size + 1 + size + 1, path);
    ncwd_path = canonify(ncwd_path_nc, retlen);
    if (!ncwd_path) {
        futex_up(&cwd_futex);
        free(ncwd_path_nc);
        return NULL;
    }
    /*
     * We need to clone ncwd_path because canonify() works in-place and thus
     * the address in ncwd_path need not be the same as ncwd_path_nc, even
     * though they both point into the same dynamically allocated buffer.
     */
    ncwd_path = str_dup(ncwd_path);
    free(ncwd_path_nc);
    if (!ncwd_path) {
        futex_up(&cwd_futex);
        return NULL;
    }
    futex_up(&cwd_futex);
    return ncwd_path;
}
 
static void vfs_connect(void)
{
    while (vfs_phone < 0)
        vfs_phone = ipc_connect_me_to_blocking(PHONE_NS, SERVICE_VFS, 0, 0);
}
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
int mount(const char *fs_name, const char *mp, const char *dev,
    const char *opts, unsigned int flags)
{
    int res;
    ipcarg_t rc;
    aid_t req;
    dev_handle_t dev_handle;
   
    res = devmap_device_get_handle(dev, &dev_handle, flags);
    if (res != EOK)
        return res;
   
    size_t mpa_size;
    char *mpa = absolutize(mp, &mpa_size);
    if (!mpa)
        return ENOMEM;
   
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    vfs_connect();
   
    req = async_send_2(vfs_phone, VFS_MOUNT, dev_handle, flags, NULL);
    rc = ipc_data_write_start(vfs_phone, (void *) mpa, mpa_size);
    if (rc != EOK) {
        async_wait_for(req, NULL);
        async_serialize_end();
        futex_up(&vfs_phone_futex);
        free(mpa);
        return (int) rc;
    }
   
    rc = ipc_data_write_start(vfs_phone, (void *) opts, str_size(opts));
    if (rc != EOK) {
        async_wait_for(req, NULL);
        async_serialize_end();
        futex_up(&vfs_phone_futex);
        free(mpa);
        return (int) rc;
    }
 
    rc = ipc_data_write_start(vfs_phone, (void *) fs_name, str_size(fs_name));
    if (rc != EOK) {
        async_wait_for(req, NULL);
        async_serialize_end();
        futex_up(&vfs_phone_futex);
        free(mpa);
        return (int) rc;
    }
 
    /* Ask VFS whether it likes fs_name. */
    rc = async_req_0_0(vfs_phone, IPC_M_PING);
    if (rc != EOK) {
        async_wait_for(req, NULL);
        async_serialize_end();
        futex_up(&vfs_phone_futex);
        free(mpa);
        return (int) rc;
    }
   
    async_wait_for(req, &rc);
    async_serialize_end();
    futex_up(&vfs_phone_futex);
    free(mpa);
   
    return (int) rc;
}
 
static int _open(const char *path, int lflag, int oflag, ...)
{
    ipcarg_t rc;
    ipc_call_t answer;
    aid_t req;
   
    size_t pa_size;
    char *pa = absolutize(path, &pa_size);
    if (!pa)
        return ENOMEM;
   
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    vfs_connect();
   
    req = async_send_3(vfs_phone, VFS_OPEN, lflag, oflag, 0, &answer);
    rc = ipc_data_write_start(vfs_phone, pa, pa_size);
    if (rc != EOK) {
        async_wait_for(req, NULL);
        async_serialize_end();
        futex_up(&vfs_phone_futex);
        free(pa);
        return (int) rc;
    }
    async_wait_for(req, &rc);
    async_serialize_end();
    futex_up(&vfs_phone_futex);
    free(pa);
 
    if (rc != EOK)
        return (int) rc;
    return (int) IPC_GET_ARG1(answer);
}
 
int open(const char *path, int oflag, ...)
{
    return _open(path, L_FILE, oflag);
}
 
int close(int fildes)
{
    ipcarg_t rc;
   
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    vfs_connect();
   
    rc = async_req_1_0(vfs_phone, VFS_CLOSE, fildes);
   
    async_serialize_end();
    futex_up(&vfs_phone_futex);
   
    return (int)rc;
}
 
ssize_t read(int fildes, void *buf, size_t nbyte)
{
    ipcarg_t rc;
    ipc_call_t answer;
    aid_t req;
 
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    vfs_connect();
   
    req = async_send_1(vfs_phone, VFS_READ, fildes, &answer);
    rc = ipc_data_read_start(vfs_phone, (void *)buf, nbyte);
    if (rc != 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);
    if (rc == EOK)
        return (ssize_t) IPC_GET_ARG1(answer);
    else
        return rc;
}
 
ssize_t write(int fildes, const void *buf, size_t nbyte)
{
    ipcarg_t rc;
    ipc_call_t answer;
    aid_t req;
 
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    vfs_connect();
   
    req = async_send_1(vfs_phone, VFS_WRITE, fildes, &answer);
    rc = ipc_data_write_start(vfs_phone, (void *)buf, nbyte);
    if (rc != 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);
    if (rc == EOK)
        return (ssize_t) IPC_GET_ARG1(answer);
    else
        return -1;
}
 
off_t lseek(int fildes, off_t offset, int whence)
{
    ipcarg_t rc;
 
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    vfs_connect();
   
    ipcarg_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 (off_t) newoffs;
}
 
int ftruncate(int fildes, off_t length)
{
    ipcarg_t rc;
   
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    vfs_connect();
   
    rc = async_req_2_0(vfs_phone, VFS_TRUNCATE, fildes, length);
    async_serialize_end();
    futex_up(&vfs_phone_futex);
    return (int) rc;
}
 
DIR *opendir(const char *dirname)
{
    DIR *dirp = malloc(sizeof(DIR));
    if (!dirp)
        return NULL;
    dirp->fd = _open(dirname, L_DIRECTORY, 0);
    if (dirp->fd < 0) {
        free(dirp);
        return NULL;
    }
    return dirp;
}
 
struct dirent *readdir(DIR *dirp)
{
    ssize_t len = read(dirp->fd, &dirp->res.d_name[0], NAME_MAX + 1);
    if (len <= 0)
        return NULL;
    return &dirp->res;
}
 
void rewinddir(DIR *dirp)
{
    (void) lseek(dirp->fd, 0, SEEK_SET);
}
 
int closedir(DIR *dirp)
{
    (void) close(dirp->fd);
    free(dirp);
    return 0;
}
 
int mkdir(const char *path, mode_t mode)
{
    ipcarg_t rc;
    aid_t req;
   
    size_t pa_size;
    char *pa = absolutize(path, &pa_size);
    if (!pa)
        return ENOMEM;
   
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    vfs_connect();
   
    req = async_send_1(vfs_phone, VFS_MKDIR, mode, NULL);
    rc = ipc_data_write_start(vfs_phone, pa, pa_size);
    if (rc != EOK) {
        async_wait_for(req, NULL);
        async_serialize_end();
        futex_up(&vfs_phone_futex);
        free(pa);
        return (int) rc;
    }
    async_wait_for(req, &rc);
    async_serialize_end();
    futex_up(&vfs_phone_futex);
    free(pa);
    return rc;
}
 
static int _unlink(const char *path, int lflag)
{
    ipcarg_t rc;
    aid_t req;
   
    size_t pa_size;
    char *pa = absolutize(path, &pa_size);
    if (!pa)
        return ENOMEM;
 
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    vfs_connect();
   
    req = async_send_0(vfs_phone, VFS_UNLINK, NULL);
    rc = ipc_data_write_start(vfs_phone, pa, pa_size);
    if (rc != EOK) {
        async_wait_for(req, NULL);
        async_serialize_end();
        futex_up(&vfs_phone_futex);
        free(pa);
        return (int) rc;
    }
    async_wait_for(req, &rc);
    async_serialize_end();
    futex_up(&vfs_phone_futex);
    free(pa);
    return rc;
}
 
int unlink(const char *path)
{
    return _unlink(path, L_NONE);
}
 
int rmdir(const char *path)
{
    return _unlink(path, L_DIRECTORY);
}
 
int rename(const char *old, const char *new)
{
    ipcarg_t rc;
    aid_t req;
   
    size_t olda_size;
    char *olda = absolutize(old, &olda_size);
    if (!olda)
        return ENOMEM;
 
    size_t newa_size;
    char *newa = absolutize(new, &newa_size);
    if (!newa) {
        free(olda);
        return ENOMEM;
    }
 
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    vfs_connect();
   
    req = async_send_0(vfs_phone, VFS_RENAME, NULL);
    rc = ipc_data_write_start(vfs_phone, olda, olda_size);
    if (rc != EOK) {
        async_wait_for(req, NULL);
        async_serialize_end();
        futex_up(&vfs_phone_futex);
        free(olda);
        free(newa);
        return (int) rc;
    }
    rc = ipc_data_write_start(vfs_phone, newa, newa_size);
    if (rc != EOK) {
        async_wait_for(req, NULL);
        async_serialize_end();
        futex_up(&vfs_phone_futex);
        free(olda);
        free(newa);
        return (int) rc;
    }
    async_wait_for(req, &rc);
    async_serialize_end();
    futex_up(&vfs_phone_futex);
    free(olda);
    free(newa);
    return rc;
}
 
int chdir(const char *path)
{
    size_t pa_size;
    char *pa = absolutize(path, &pa_size);
    if (!pa)
        return ENOMEM;
 
    DIR *d = opendir(pa);
    if (!d) {
        free(pa);
        return ENOENT;
    }
 
    futex_down(&cwd_futex);
    if (cwd_dir) {
        closedir(cwd_dir);
        cwd_dir = NULL;
        free(cwd_path);
        cwd_path = NULL;
        cwd_size = 0;
    }
    cwd_dir = d;
    cwd_path = pa;
    cwd_size = pa_size;
    futex_up(&cwd_futex);
    return EOK;
}
 
char *getcwd(char *buf, size_t size)
{
    if (!size)
        return NULL;
    futex_down(&cwd_futex);
    if (size < cwd_size + 1) {
        futex_up(&cwd_futex);
        return NULL;
    }
    str_cpy(buf, size, cwd_path);
    futex_up(&cwd_futex);
    return buf;
}
 
/** @}
 */
 

Rev 4305	Rev 4401
1	/*	1	/*
2	* Copyright (c) 2008 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/vfs.h>	35	#include <vfs/vfs.h>
36	#include <vfs/canonify.h>	36	#include <vfs/canonify.h>
37	#include <stdlib.h>	37	#include <stdlib.h>
38	#include <unistd.h>	38	#include <unistd.h>
39	#include <dirent.h>	39	#include <dirent.h>
40	#include <fcntl.h>	40	#include <fcntl.h>
41	#include <sys/stat.h>	41	#include <sys/stat.h>
42	#include <stdio.h>	42	#include <stdio.h>
43	#include <sys/types.h>	43	#include <sys/types.h>
44	#include <ipc/ipc.h>	44	#include <ipc/ipc.h>
45	#include <ipc/services.h>	45	#include <ipc/services.h>
46	#include <async.h>	46	#include <async.h>
47	#include <atomic.h>	47	#include <atomic.h>
48	#include <futex.h>	48	#include <futex.h>
49	#include <errno.h>	49	#include <errno.h>
50	#include <string.h>	50	#include <string.h>
51	#include <ipc/devmap.h>	51	#include <devmap.h>
52	#include "../../../srv/vfs/vfs.h"	52	#include "../../../srv/vfs/vfs.h"
53		53
54	int vfs_phone = -1;	54	int vfs_phone = -1;
55	futex_t vfs_phone_futex = FUTEX_INITIALIZER;	55	futex_t vfs_phone_futex = FUTEX_INITIALIZER;
56		56
57	futex_t cwd_futex = FUTEX_INITIALIZER;	57	futex_t cwd_futex = FUTEX_INITIALIZER;
58	DIR *cwd_dir = NULL;	58	DIR *cwd_dir = NULL;
59	char *cwd_path = NULL;	59	char *cwd_path = NULL;
60	size_t cwd_size = 0;	60	size_t cwd_size = 0;
61		61
62	char absolutize(const char path, size_t *retlen)	62	char absolutize(const char path, size_t *retlen)
63	{	63	{
64	char *ncwd_path;	64	char *ncwd_path;
65	char *ncwd_path_nc;	65	char *ncwd_path_nc;
66		66
67	futex_down(&cwd_futex);	67	futex_down(&cwd_futex);
68	size_t size = str_size(path);	68	size_t size = str_size(path);
69	if (*path != '/') {	69	if (*path != '/') {
70	if (!cwd_path) {	70	if (!cwd_path) {
71	futex_up(&cwd_futex);	71	futex_up(&cwd_futex);
72	return NULL;	72	return NULL;
73	}	73	}
74	ncwd_path_nc = malloc(cwd_size + 1 + size + 1);	74	ncwd_path_nc = malloc(cwd_size + 1 + size + 1);
75	if (!ncwd_path_nc) {	75	if (!ncwd_path_nc) {
76	futex_up(&cwd_futex);	76	futex_up(&cwd_futex);
77	return NULL;	77	return NULL;
78	}	78	}
79	str_cpy(ncwd_path_nc, cwd_size + 1 + size + 1, cwd_path);	79	str_cpy(ncwd_path_nc, cwd_size + 1 + size + 1, cwd_path);
80	ncwd_path_nc[cwd_size] = '/';	80	ncwd_path_nc[cwd_size] = '/';
81	ncwd_path_nc[cwd_size + 1] = '\0';	81	ncwd_path_nc[cwd_size + 1] = '\0';
82	} else {	82	} else {
83	ncwd_path_nc = malloc(size + 1);	83	ncwd_path_nc = malloc(size + 1);
84	if (!ncwd_path_nc) {	84	if (!ncwd_path_nc) {
85	futex_up(&cwd_futex);	85	futex_up(&cwd_futex);
86	return NULL;	86	return NULL;
87	}	87	}
88	ncwd_path_nc[0] = '\0';	88	ncwd_path_nc[0] = '\0';
89	}	89	}
90	str_append(ncwd_path_nc, cwd_size + 1 + size + 1, path);	90	str_append(ncwd_path_nc, cwd_size + 1 + size + 1, path);
91	ncwd_path = canonify(ncwd_path_nc, retlen);	91	ncwd_path = canonify(ncwd_path_nc, retlen);
92	if (!ncwd_path) {	92	if (!ncwd_path) {
93	futex_up(&cwd_futex);	93	futex_up(&cwd_futex);
94	free(ncwd_path_nc);	94	free(ncwd_path_nc);
95	return NULL;	95	return NULL;
96	}	96	}
97	/*	97	/*
98	* We need to clone ncwd_path because canonify() works in-place and thus	98	* We need to clone ncwd_path because canonify() works in-place and thus
99	* the address in ncwd_path need not be the same as ncwd_path_nc, even	99	* the address in ncwd_path need not be the same as ncwd_path_nc, even
100	* though they both point into the same dynamically allocated buffer.	100	* though they both point into the same dynamically allocated buffer.
101	*/	101	*/
102	ncwd_path = str_dup(ncwd_path);	102	ncwd_path = str_dup(ncwd_path);
103	free(ncwd_path_nc);	103	free(ncwd_path_nc);
104	if (!ncwd_path) {	104	if (!ncwd_path) {
105	futex_up(&cwd_futex);	105	futex_up(&cwd_futex);
106	return NULL;	106	return NULL;
107	}	107	}
108	futex_up(&cwd_futex);	108	futex_up(&cwd_futex);
109	return ncwd_path;	109	return ncwd_path;
110	}	110	}
111		111
112	static void vfs_connect(void)	112	static void vfs_connect(void)
113	{	113	{
114	while (vfs_phone < 0)	114	while (vfs_phone < 0)
115	vfs_phone = ipc_connect_me_to_blocking(PHONE_NS, SERVICE_VFS, 0, 0);	115	vfs_phone = ipc_connect_me_to_blocking(PHONE_NS, SERVICE_VFS, 0, 0);
116	}	116	}
117		117
118	static int device_get_handle(const char name, dev_handle_t handle,	-
119	const unsigned int flags)	-
120	{	-
121	int phone;	-
122		-
123	if (flags & IPC_FLAG_BLOCKING)	-
124	phone = ipc_connect_me_to_blocking(PHONE_NS, SERVICE_DEVMAP, DEVMAP_CLIENT, 0);	-
125	else	-
126	phone = ipc_connect_me_to(PHONE_NS, SERVICE_DEVMAP, DEVMAP_CLIENT, 0);	-
127		-
128	if (phone < 0)	-
129	return phone;	-
130		-
131	ipc_call_t answer;	-
132	aid_t req = async_send_2(phone, DEVMAP_DEVICE_GET_HANDLE, flags, 0,	-
133	&answer);	-
134		-
135	ipcarg_t retval = ipc_data_write_start(phone, name, str_size(name) + 1);	-
136		-
137	if (retval != EOK) {	-
138	async_wait_for(req, NULL);	-
139	ipc_hangup(phone);	-
140	return retval;	-
141	}	-
142		-
143	async_wait_for(req, &retval);	-
144		-
145	if (handle != NULL)	-
146	*handle = -1;	-
147		-
148	if (retval == EOK) {	-
149	if (handle != NULL)	-
150	*handle = (dev_handle_t) IPC_GET_ARG1(answer);	-
151	}	-
152		-
153	ipc_hangup(phone);	-
154	return retval;	-
155	}	-
156		-
157	int mount(const char fs_name, const char mp, const char *dev,	118	int mount(const char fs_name, const char mp, const char *dev,
158	const char *opts, const unsigned int flags)	119	const char *opts, unsigned int flags)
159	{	120	{
160	int res;	121	int res;
161	ipcarg_t rc;	122	ipcarg_t rc;
162	aid_t req;	123	aid_t req;
163	dev_handle_t dev_handle;	124	dev_handle_t dev_handle;
164		125
165	res = device_get_handle(dev, &dev_handle, flags);	126	res = devmap_device_get_handle(dev, &dev_handle, flags);
166	if (res != EOK)	127	if (res != EOK)
167	return res;	128	return res;
168		129
169	size_t mpa_size;	130	size_t mpa_size;
170	char *mpa = absolutize(mp, &mpa_size);	131	char *mpa = absolutize(mp, &mpa_size);
171	if (!mpa)	132	if (!mpa)
172	return ENOMEM;	133	return ENOMEM;
173		134
174	futex_down(&vfs_phone_futex);	135	futex_down(&vfs_phone_futex);
175	async_serialize_start();	136	async_serialize_start();
176	vfs_connect();	137	vfs_connect();
177		138
178	req = async_send_2(vfs_phone, VFS_MOUNT, dev_handle, flags, NULL);	139	req = async_send_2(vfs_phone, VFS_MOUNT, dev_handle, flags, NULL);
179	rc = ipc_data_write_start(vfs_phone, (void *) mpa, mpa_size);	140	rc = ipc_data_write_start(vfs_phone, (void *) mpa, mpa_size);
180	if (rc != EOK) {	141	if (rc != EOK) {
181	async_wait_for(req, NULL);	142	async_wait_for(req, NULL);
182	async_serialize_end();	143	async_serialize_end();
183	futex_up(&vfs_phone_futex);	144	futex_up(&vfs_phone_futex);
184	free(mpa);	145	free(mpa);
185	return (int) rc;	146	return (int) rc;
186	}	147	}
187		148
188	rc = ipc_data_write_start(vfs_phone, (void *) opts, str_size(opts));	149	rc = ipc_data_write_start(vfs_phone, (void *) opts, str_size(opts));
189	if (rc != EOK) {	150	if (rc != EOK) {
190	async_wait_for(req, NULL);	151	async_wait_for(req, NULL);
191	async_serialize_end();	152	async_serialize_end();
192	futex_up(&vfs_phone_futex);	153	futex_up(&vfs_phone_futex);
193	free(mpa);	154	free(mpa);
194	return (int) rc;	155	return (int) rc;
195	}	156	}
196		157
197	rc = ipc_data_write_start(vfs_phone, (void *) fs_name, str_size(fs_name));	158	rc = ipc_data_write_start(vfs_phone, (void *) fs_name, str_size(fs_name));
198	if (rc != EOK) {	159	if (rc != EOK) {
199	async_wait_for(req, NULL);	160	async_wait_for(req, NULL);
200	async_serialize_end();	161	async_serialize_end();
201	futex_up(&vfs_phone_futex);	162	futex_up(&vfs_phone_futex);
202	free(mpa);	163	free(mpa);
203	return (int) rc;	164	return (int) rc;
204	}	165	}
205		166
206	/* Ask VFS whether it likes fs_name. */	167	/* Ask VFS whether it likes fs_name. */
207	rc = async_req_0_0(vfs_phone, IPC_M_PING);	168	rc = async_req_0_0(vfs_phone, IPC_M_PING);
208	if (rc != EOK) {	169	if (rc != EOK) {
209	async_wait_for(req, NULL);	170	async_wait_for(req, NULL);
210	async_serialize_end();	171	async_serialize_end();
211	futex_up(&vfs_phone_futex);	172	futex_up(&vfs_phone_futex);
212	free(mpa);	173	free(mpa);
213	return (int) rc;	174	return (int) rc;
214	}	175	}
215		176
216	async_wait_for(req, &rc);	177	async_wait_for(req, &rc);
217	async_serialize_end();	178	async_serialize_end();
218	futex_up(&vfs_phone_futex);	179	futex_up(&vfs_phone_futex);
219	free(mpa);	180	free(mpa);
220		181
221	return (int) rc;	182	return (int) rc;
222	}	183	}
223		184
224	static int _open(const char *path, int lflag, int oflag, ...)	185	static int _open(const char *path, int lflag, int oflag, ...)
225	{	186	{
226	ipcarg_t rc;	187	ipcarg_t rc;
227	ipc_call_t answer;	188	ipc_call_t answer;
228	aid_t req;	189	aid_t req;
229		190
230	size_t pa_size;	191	size_t pa_size;
231	char *pa = absolutize(path, &pa_size);	192	char *pa = absolutize(path, &pa_size);
232	if (!pa)	193	if (!pa)
233	return ENOMEM;	194	return ENOMEM;
234		195
235	futex_down(&vfs_phone_futex);	196	futex_down(&vfs_phone_futex);
236	async_serialize_start();	197	async_serialize_start();
237	vfs_connect();	198	vfs_connect();
238		199
239	req = async_send_3(vfs_phone, VFS_OPEN, lflag, oflag, 0, &answer);	200	req = async_send_3(vfs_phone, VFS_OPEN, lflag, oflag, 0, &answer);
240	rc = ipc_data_write_start(vfs_phone, pa, pa_size);	201	rc = ipc_data_write_start(vfs_phone, pa, pa_size);
241	if (rc != EOK) {	202	if (rc != EOK) {
242	async_wait_for(req, NULL);	203	async_wait_for(req, NULL);
243	async_serialize_end();	204	async_serialize_end();
244	futex_up(&vfs_phone_futex);	205	futex_up(&vfs_phone_futex);
245	free(pa);	206	free(pa);
246	return (int) rc;	207	return (int) rc;
247	}	208	}
248	async_wait_for(req, &rc);	209	async_wait_for(req, &rc);
249	async_serialize_end();	210	async_serialize_end();
250	futex_up(&vfs_phone_futex);	211	futex_up(&vfs_phone_futex);
251	free(pa);	212	free(pa);
252		213
253	if (rc != EOK)	214	if (rc != EOK)
254	return (int) rc;	215	return (int) rc;
255	return (int) IPC_GET_ARG1(answer);	216	return (int) IPC_GET_ARG1(answer);
256	}	217	}
257		218
258	int open(const char *path, int oflag, ...)	219	int open(const char *path, int oflag, ...)
259	{	220	{
260	return _open(path, L_FILE, oflag);	221	return _open(path, L_FILE, oflag);
261	}	222	}
262		223
263	int close(int fildes)	224	int close(int fildes)
264	{	225	{
265	ipcarg_t rc;	226	ipcarg_t rc;
266		227
267	futex_down(&vfs_phone_futex);	228	futex_down(&vfs_phone_futex);
268	async_serialize_start();	229	async_serialize_start();
269	vfs_connect();	230	vfs_connect();
270		231
271	rc = async_req_1_0(vfs_phone, VFS_CLOSE, fildes);	232	rc = async_req_1_0(vfs_phone, VFS_CLOSE, fildes);
272		233
273	async_serialize_end();	234	async_serialize_end();
274	futex_up(&vfs_phone_futex);	235	futex_up(&vfs_phone_futex);
275		236
276	return (int)rc;	237	return (int)rc;
277	}	238	}
278		239
279	ssize_t read(int fildes, void *buf, size_t nbyte)	240	ssize_t read(int fildes, void *buf, size_t nbyte)
280	{	241	{
281	ipcarg_t rc;	242	ipcarg_t rc;
282	ipc_call_t answer;	243	ipc_call_t answer;
283	aid_t req;	244	aid_t req;
284		245
285	futex_down(&vfs_phone_futex);	246	futex_down(&vfs_phone_futex);
286	async_serialize_start();	247	async_serialize_start();
287	vfs_connect();	248	vfs_connect();
288		249
289	req = async_send_1(vfs_phone, VFS_READ, fildes, &answer);	250	req = async_send_1(vfs_phone, VFS_READ, fildes, &answer);
290	rc = ipc_data_read_start(vfs_phone, (void *)buf, nbyte);	251	rc = ipc_data_read_start(vfs_phone, (void *)buf, nbyte);
291	if (rc != EOK) {	252	if (rc != EOK) {
292	async_wait_for(req, NULL);	253	async_wait_for(req, NULL);
293	async_serialize_end();	254	async_serialize_end();
294	futex_up(&vfs_phone_futex);	255	futex_up(&vfs_phone_futex);
295	return (ssize_t) rc;	256	return (ssize_t) rc;
296	}	257	}
297	async_wait_for(req, &rc);	258	async_wait_for(req, &rc);
298	async_serialize_end();	259	async_serialize_end();
299	futex_up(&vfs_phone_futex);	260	futex_up(&vfs_phone_futex);
300	if (rc == EOK)	261	if (rc == EOK)
301	return (ssize_t) IPC_GET_ARG1(answer);	262	return (ssize_t) IPC_GET_ARG1(answer);
302	else	263	else
303	return rc;	264	return rc;
304	}	265	}
305		266
306	ssize_t write(int fildes, const void *buf, size_t nbyte)	267	ssize_t write(int fildes, const void *buf, size_t nbyte)
307	{	268	{
308	ipcarg_t rc;	269	ipcarg_t rc;
309	ipc_call_t answer;	270	ipc_call_t answer;
310	aid_t req;	271	aid_t req;
311		272
312	futex_down(&vfs_phone_futex);	273	futex_down(&vfs_phone_futex);
313	async_serialize_start();	274	async_serialize_start();
314	vfs_connect();	275	vfs_connect();
315		276
316	req = async_send_1(vfs_phone, VFS_WRITE, fildes, &answer);	277	req = async_send_1(vfs_phone, VFS_WRITE, fildes, &answer);
317	rc = ipc_data_write_start(vfs_phone, (void *)buf, nbyte);	278	rc = ipc_data_write_start(vfs_phone, (void *)buf, nbyte);
318	if (rc != EOK) {	279	if (rc != EOK) {
319	async_wait_for(req, NULL);	280	async_wait_for(req, NULL);
320	async_serialize_end();	281	async_serialize_end();
321	futex_up(&vfs_phone_futex);	282	futex_up(&vfs_phone_futex);
322	return (ssize_t) rc;	283	return (ssize_t) rc;
323	}	284	}
324	async_wait_for(req, &rc);	285	async_wait_for(req, &rc);
325	async_serialize_end();	286	async_serialize_end();
326	futex_up(&vfs_phone_futex);	287	futex_up(&vfs_phone_futex);
327	if (rc == EOK)	288	if (rc == EOK)
328	return (ssize_t) IPC_GET_ARG1(answer);	289	return (ssize_t) IPC_GET_ARG1(answer);
329	else	290	else
330	return -1;	291	return -1;
331	}	292	}
332		293
333	off_t lseek(int fildes, off_t offset, int whence)	294	off_t lseek(int fildes, off_t offset, int whence)
334	{	295	{
335	ipcarg_t rc;	296	ipcarg_t rc;
336		297
337	futex_down(&vfs_phone_futex);	298	futex_down(&vfs_phone_futex);
338	async_serialize_start();	299	async_serialize_start();
339	vfs_connect();	300	vfs_connect();
340		301
341	ipcarg_t newoffs;	302	ipcarg_t newoffs;
342	rc = async_req_3_1(vfs_phone, VFS_SEEK, fildes, offset, whence,	303	rc = async_req_3_1(vfs_phone, VFS_SEEK, fildes, offset, whence,
343	&newoffs);	304	&newoffs);
344		305
345	async_serialize_end();	306	async_serialize_end();
346	futex_up(&vfs_phone_futex);	307	futex_up(&vfs_phone_futex);
347		308
348	if (rc != EOK)	309	if (rc != EOK)
349	return (off_t) -1;	310	return (off_t) -1;
350		311
351	return (off_t) newoffs;	312	return (off_t) newoffs;
352	}	313	}
353		314
354	int ftruncate(int fildes, off_t length)	315	int ftruncate(int fildes, off_t length)
355	{	316	{
356	ipcarg_t rc;	317	ipcarg_t rc;
357		318
358	futex_down(&vfs_phone_futex);	319	futex_down(&vfs_phone_futex);
359	async_serialize_start();	320	async_serialize_start();
360	vfs_connect();	321	vfs_connect();
361		322
362	rc = async_req_2_0(vfs_phone, VFS_TRUNCATE, fildes, length);	323	rc = async_req_2_0(vfs_phone, VFS_TRUNCATE, fildes, length);
363	async_serialize_end();	324	async_serialize_end();
364	futex_up(&vfs_phone_futex);	325	futex_up(&vfs_phone_futex);
365	return (int) rc;	326	return (int) rc;
366	}	327	}
367		328
368	DIR opendir(const char dirname)	329	DIR opendir(const char dirname)
369	{	330	{
370	DIR *dirp = malloc(sizeof(DIR));	331	DIR *dirp = malloc(sizeof(DIR));
371	if (!dirp)	332	if (!dirp)
372	return NULL;	333	return NULL;
373	dirp->fd = _open(dirname, L_DIRECTORY, 0);	334	dirp->fd = _open(dirname, L_DIRECTORY, 0);
374	if (dirp->fd < 0) {	335	if (dirp->fd < 0) {
375	free(dirp);	336	free(dirp);
376	return NULL;	337	return NULL;
377	}	338	}
378	return dirp;	339	return dirp;
379	}	340	}
380		341
381	struct dirent readdir(DIR dirp)	342	struct dirent readdir(DIR dirp)
382	{	343	{
383	ssize_t len = read(dirp->fd, &dirp->res.d_name[0], NAME_MAX + 1);	344	ssize_t len = read(dirp->fd, &dirp->res.d_name[0], NAME_MAX + 1);
384	if (len <= 0)	345	if (len <= 0)
385	return NULL;	346	return NULL;
386	return &dirp->res;	347	return &dirp->res;
387	}	348	}
388		349
389	void rewinddir(DIR *dirp)	350	void rewinddir(DIR *dirp)
390	{	351	{
391	(void) lseek(dirp->fd, 0, SEEK_SET);	352	(void) lseek(dirp->fd, 0, SEEK_SET);
392	}	353	}
393		354
394	int closedir(DIR *dirp)	355	int closedir(DIR *dirp)
395	{	356	{
396	(void) close(dirp->fd);	357	(void) close(dirp->fd);
397	free(dirp);	358	free(dirp);
398	return 0;	359	return 0;
399	}	360	}
400		361
401	int mkdir(const char *path, mode_t mode)	362	int mkdir(const char *path, mode_t mode)
402	{	363	{
403	ipcarg_t rc;	364	ipcarg_t rc;
404	aid_t req;	365	aid_t req;
405		366
406	size_t pa_size;	367	size_t pa_size;
407	char *pa = absolutize(path, &pa_size);	368	char *pa = absolutize(path, &pa_size);
408	if (!pa)	369	if (!pa)
409	return ENOMEM;	370	return ENOMEM;
410		371
411	futex_down(&vfs_phone_futex);	372	futex_down(&vfs_phone_futex);
412	async_serialize_start();	373	async_serialize_start();
413	vfs_connect();	374	vfs_connect();
414		375
415	req = async_send_1(vfs_phone, VFS_MKDIR, mode, NULL);	376	req = async_send_1(vfs_phone, VFS_MKDIR, mode, NULL);
416	rc = ipc_data_write_start(vfs_phone, pa, pa_size);	377	rc = ipc_data_write_start(vfs_phone, pa, pa_size);
417	if (rc != EOK) {	378	if (rc != EOK) {
418	async_wait_for(req, NULL);	379	async_wait_for(req, NULL);
419	async_serialize_end();	380	async_serialize_end();
420	futex_up(&vfs_phone_futex);	381	futex_up(&vfs_phone_futex);
421	free(pa);	382	free(pa);
422	return (int) rc;	383	return (int) rc;
423	}	384	}
424	async_wait_for(req, &rc);	385	async_wait_for(req, &rc);
425	async_serialize_end();	386	async_serialize_end();
426	futex_up(&vfs_phone_futex);	387	futex_up(&vfs_phone_futex);
427	free(pa);	388	free(pa);
428	return rc;	389	return rc;
429	}	390	}
430		391
431	static int _unlink(const char *path, int lflag)	392	static int _unlink(const char *path, int lflag)
432	{	393	{
433	ipcarg_t rc;	394	ipcarg_t rc;
434	aid_t req;	395	aid_t req;
435		396
436	size_t pa_size;	397	size_t pa_size;
437	char *pa = absolutize(path, &pa_size);	398	char *pa = absolutize(path, &pa_size);
438	if (!pa)	399	if (!pa)
439	return ENOMEM;	400	return ENOMEM;
440		401
441	futex_down(&vfs_phone_futex);	402	futex_down(&vfs_phone_futex);
442	async_serialize_start();	403	async_serialize_start();
443	vfs_connect();	404	vfs_connect();
444		405
445	req = async_send_0(vfs_phone, VFS_UNLINK, NULL);	406	req = async_send_0(vfs_phone, VFS_UNLINK, NULL);
446	rc = ipc_data_write_start(vfs_phone, pa, pa_size);	407	rc = ipc_data_write_start(vfs_phone, pa, pa_size);
447	if (rc != EOK) {	408	if (rc != EOK) {
448	async_wait_for(req, NULL);	409	async_wait_for(req, NULL);
449	async_serialize_end();	410	async_serialize_end();
450	futex_up(&vfs_phone_futex);	411	futex_up(&vfs_phone_futex);
451	free(pa);	412	free(pa);
452	return (int) rc;	413	return (int) rc;
453	}	414	}
454	async_wait_for(req, &rc);	415	async_wait_for(req, &rc);
455	async_serialize_end();	416	async_serialize_end();
456	futex_up(&vfs_phone_futex);	417	futex_up(&vfs_phone_futex);
457	free(pa);	418	free(pa);
458	return rc;	419	return rc;
459	}	420	}
460		421
461	int unlink(const char *path)	422	int unlink(const char *path)
462	{	423	{
463	return _unlink(path, L_NONE);	424	return _unlink(path, L_NONE);
464	}	425	}
465		426
466	int rmdir(const char *path)	427	int rmdir(const char *path)
467	{	428	{
468	return _unlink(path, L_DIRECTORY);	429	return _unlink(path, L_DIRECTORY);
469	}	430	}
470		431
471	int rename(const char old, const char new)	432	int rename(const char old, const char new)
472	{	433	{
473	ipcarg_t rc;	434	ipcarg_t rc;
474	aid_t req;	435	aid_t req;
475		436
476	size_t olda_size;	437	size_t olda_size;
477	char *olda = absolutize(old, &olda_size);	438	char *olda = absolutize(old, &olda_size);
478	if (!olda)	439	if (!olda)
479	return ENOMEM;	440	return ENOMEM;
480		441
481	size_t newa_size;	442	size_t newa_size;
482	char *newa = absolutize(new, &newa_size);	443	char *newa = absolutize(new, &newa_size);
483	if (!newa) {	444	if (!newa) {
484	free(olda);	445	free(olda);
485	return ENOMEM;	446	return ENOMEM;
486	}	447	}
487		448
488	futex_down(&vfs_phone_futex);	449	futex_down(&vfs_phone_futex);
489	async_serialize_start();	450	async_serialize_start();
490	vfs_connect();	451	vfs_connect();
491		452
492	req = async_send_0(vfs_phone, VFS_RENAME, NULL);	453	req = async_send_0(vfs_phone, VFS_RENAME, NULL);
493	rc = ipc_data_write_start(vfs_phone, olda, olda_size);	454	rc = ipc_data_write_start(vfs_phone, olda, olda_size);
494	if (rc != EOK) {	455	if (rc != EOK) {
495	async_wait_for(req, NULL);	456	async_wait_for(req, NULL);
496	async_serialize_end();	457	async_serialize_end();
497	futex_up(&vfs_phone_futex);	458	futex_up(&vfs_phone_futex);
498	free(olda);	459	free(olda);
499	free(newa);	460	free(newa);
500	return (int) rc;	461	return (int) rc;

Subversion Repositories HelenOS

(root)/trunk/uspace/lib/libc/generic/vfs/vfs.c @ 4682 – Rev 4305 → 4401