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/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 <ipc/vfs.h>
#include <ipc/devmap.h>
 
static int vfs_phone = -1;
static futex_t vfs_phone_futex = FUTEX_INITIALIZER;
static 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 open_node(fdi_node_t *node, int oflag)
{
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    vfs_connect();
   
    ipc_call_t answer;
    aid_t req = async_send_4(vfs_phone, VFS_OPEN_NODE, node->fs_handle,
        node->dev_handle, node->index, oflag, &answer);
   
    ipcarg_t rc;
    async_wait_for(req, &rc);
    async_serialize_end();
    futex_up(&vfs_phone_futex);
   
    if (rc != EOK)
        return (int) rc;
   
    return (int) IPC_GET_ARG1(answer);
}
 
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;
}
 
int fd_phone(int fildes)
{
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    vfs_connect();
   
    ipcarg_t device;
    ipcarg_t rc = async_req_1_1(vfs_phone, VFS_DEVICE, fildes, &device);
   
    async_serialize_end();
    futex_up(&vfs_phone_futex);
   
    if (rc != EOK)
        return -1;
   
    return devmap_device_connect((dev_handle_t) device, 0);
}
 
int fd_node(int fildes, fdi_node_t *node)
{
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    vfs_connect();
   
    ipcarg_t fs_handle;
    ipcarg_t dev_handle;
    ipcarg_t index;
    ipcarg_t rc = async_req_1_3(vfs_phone, VFS_NODE, fildes, &fs_handle,
        &dev_handle, &index);
   
    async_serialize_end();
    futex_up(&vfs_phone_futex);
   
    if (rc == EOK) {
        node->fs_handle = (fs_handle_t) fs_handle;
        node->dev_handle = (dev_handle_t) dev_handle;
        node->index = (fs_index_t) index;
    }
   
    return rc;
}
 
int fsync(int fildes)
{
    futex_down(&vfs_phone_futex);
    async_serialize_start();
    vfs_connect();
   
    ipcarg_t rc = async_req_1_0(vfs_phone, VFS_SYNC, fildes);
   
    async_serialize_end();
    futex_up(&vfs_phone_futex);
   
    return (int) rc;
}
 
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 4420	Rev 4537
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 <devmap.h>	51	#include <devmap.h>
52	#include "../../../srv/vfs/vfs.h"	52	#include <ipc/vfs.h>
-		53	#include <ipc/devmap.h>
53		54
54	int vfs_phone = -1;	55	static int vfs_phone = -1;
55	futex_t vfs_phone_futex = FUTEX_INITIALIZER;	56	static futex_t vfs_phone_futex = FUTEX_INITIALIZER;
-		57	static futex_t cwd_futex = FUTEX_INITIALIZER;
56		58
57	futex_t cwd_futex = FUTEX_INITIALIZER;	-
58	DIR *cwd_dir = NULL;	59	DIR *cwd_dir = NULL;
59	char *cwd_path = NULL;	60	char *cwd_path = NULL;
60	size_t cwd_size = 0;	61	size_t cwd_size = 0;
61		62
62	char absolutize(const char path, size_t *retlen)	63	char absolutize(const char path, size_t *retlen)
63	{	64	{
64	char *ncwd_path;	65	char *ncwd_path;
65	char *ncwd_path_nc;	66	char *ncwd_path_nc;
66		67
67	futex_down(&cwd_futex);	68	futex_down(&cwd_futex);
68	size_t size = str_size(path);	69	size_t size = str_size(path);
69	if (*path != '/') {	70	if (*path != '/') {
70	if (!cwd_path) {	71	if (!cwd_path) {
71	futex_up(&cwd_futex);	72	futex_up(&cwd_futex);
72	return NULL;	73	return NULL;
73	}	74	}
74	ncwd_path_nc = malloc(cwd_size + 1 + size + 1);	75	ncwd_path_nc = malloc(cwd_size + 1 + size + 1);
75	if (!ncwd_path_nc) {	76	if (!ncwd_path_nc) {
76	futex_up(&cwd_futex);	77	futex_up(&cwd_futex);
77	return NULL;	78	return NULL;
78	}	79	}
79	str_cpy(ncwd_path_nc, cwd_size + 1 + size + 1, cwd_path);	80	str_cpy(ncwd_path_nc, cwd_size + 1 + size + 1, cwd_path);
80	ncwd_path_nc[cwd_size] = '/';	81	ncwd_path_nc[cwd_size] = '/';
81	ncwd_path_nc[cwd_size + 1] = '\0';	82	ncwd_path_nc[cwd_size + 1] = '\0';
82	} else {	83	} else {
83	ncwd_path_nc = malloc(size + 1);	84	ncwd_path_nc = malloc(size + 1);
84	if (!ncwd_path_nc) {	85	if (!ncwd_path_nc) {
85	futex_up(&cwd_futex);	86	futex_up(&cwd_futex);
86	return NULL;	87	return NULL;
87	}	88	}
88	ncwd_path_nc[0] = '\0';	89	ncwd_path_nc[0] = '\0';
89	}	90	}
90	str_append(ncwd_path_nc, cwd_size + 1 + size + 1, path);	91	str_append(ncwd_path_nc, cwd_size + 1 + size + 1, path);
91	ncwd_path = canonify(ncwd_path_nc, retlen);	92	ncwd_path = canonify(ncwd_path_nc, retlen);
92	if (!ncwd_path) {	93	if (!ncwd_path) {
93	futex_up(&cwd_futex);	94	futex_up(&cwd_futex);
94	free(ncwd_path_nc);	95	free(ncwd_path_nc);
95	return NULL;	96	return NULL;
96	}	97	}
97	/*	98	/*
98	* We need to clone ncwd_path because canonify() works in-place and thus	99	* 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	100	* 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.	101	* though they both point into the same dynamically allocated buffer.
101	*/	102	*/
102	ncwd_path = str_dup(ncwd_path);	103	ncwd_path = str_dup(ncwd_path);
103	free(ncwd_path_nc);	104	free(ncwd_path_nc);
104	if (!ncwd_path) {	105	if (!ncwd_path) {
105	futex_up(&cwd_futex);	106	futex_up(&cwd_futex);
106	return NULL;	107	return NULL;
107	}	108	}
108	futex_up(&cwd_futex);	109	futex_up(&cwd_futex);
109	return ncwd_path;	110	return ncwd_path;
110	}	111	}
111		112
112	static void vfs_connect(void)	113	static void vfs_connect(void)
113	{	114	{
114	while (vfs_phone < 0)	115	while (vfs_phone < 0)
115	vfs_phone = ipc_connect_me_to_blocking(PHONE_NS, SERVICE_VFS, 0, 0);	116	vfs_phone = ipc_connect_me_to_blocking(PHONE_NS, SERVICE_VFS, 0, 0);
116	}	117	}
117		118
118	int mount(const char fs_name, const char mp, const char *dev,	119	int mount(const char fs_name, const char mp, const char *dev,
119	const char *opts, unsigned int flags)	120	const char *opts, unsigned int flags)
120	{	121	{
121	int res;	122	int res;
122	ipcarg_t rc;	123	ipcarg_t rc;
123	aid_t req;	124	aid_t req;
124	dev_handle_t dev_handle;	125	dev_handle_t dev_handle;
125		126
126	res = devmap_device_get_handle(dev, &dev_handle, flags);	127	res = devmap_device_get_handle(dev, &dev_handle, flags);
127	if (res != EOK)	128	if (res != EOK)
128	return res;	129	return res;
129		130
130	size_t mpa_size;	131	size_t mpa_size;
131	char *mpa = absolutize(mp, &mpa_size);	132	char *mpa = absolutize(mp, &mpa_size);
132	if (!mpa)	133	if (!mpa)
133	return ENOMEM;	134	return ENOMEM;
134		135
135	futex_down(&vfs_phone_futex);	136	futex_down(&vfs_phone_futex);
136	async_serialize_start();	137	async_serialize_start();
137	vfs_connect();	138	vfs_connect();
138		139
139	req = async_send_2(vfs_phone, VFS_MOUNT, dev_handle, flags, NULL);	140	req = async_send_2(vfs_phone, VFS_MOUNT, dev_handle, flags, NULL);
140	rc = ipc_data_write_start(vfs_phone, (void *) mpa, mpa_size);	141	rc = ipc_data_write_start(vfs_phone, (void *) mpa, mpa_size);
141	if (rc != EOK) {	142	if (rc != EOK) {
142	async_wait_for(req, NULL);	143	async_wait_for(req, NULL);
143	async_serialize_end();	144	async_serialize_end();
144	futex_up(&vfs_phone_futex);	145	futex_up(&vfs_phone_futex);
145	free(mpa);	146	free(mpa);
146	return (int) rc;	147	return (int) rc;
147	}	148	}
148		149
149	rc = ipc_data_write_start(vfs_phone, (void *) opts, str_size(opts));	150	rc = ipc_data_write_start(vfs_phone, (void *) opts, str_size(opts));
150	if (rc != EOK) {	151	if (rc != EOK) {
151	async_wait_for(req, NULL);	152	async_wait_for(req, NULL);
152	async_serialize_end();	153	async_serialize_end();
153	futex_up(&vfs_phone_futex);	154	futex_up(&vfs_phone_futex);
154	free(mpa);	155	free(mpa);
155	return (int) rc;	156	return (int) rc;
156	}	157	}
157		158
158	rc = ipc_data_write_start(vfs_phone, (void *) fs_name, str_size(fs_name));	159	rc = ipc_data_write_start(vfs_phone, (void *) fs_name, str_size(fs_name));
159	if (rc != EOK) {	160	if (rc != EOK) {
160	async_wait_for(req, NULL);	161	async_wait_for(req, NULL);
161	async_serialize_end();	162	async_serialize_end();
162	futex_up(&vfs_phone_futex);	163	futex_up(&vfs_phone_futex);
163	free(mpa);	164	free(mpa);
164	return (int) rc;	165	return (int) rc;
165	}	166	}
166		167
167	/* Ask VFS whether it likes fs_name. */	168	/* Ask VFS whether it likes fs_name. */
168	rc = async_req_0_0(vfs_phone, IPC_M_PING);	169	rc = async_req_0_0(vfs_phone, IPC_M_PING);
169	if (rc != EOK) {	170	if (rc != EOK) {
170	async_wait_for(req, NULL);	171	async_wait_for(req, NULL);
171	async_serialize_end();	172	async_serialize_end();
172	futex_up(&vfs_phone_futex);	173	futex_up(&vfs_phone_futex);
173	free(mpa);	174	free(mpa);
174	return (int) rc;	175	return (int) rc;
175	}	176	}
176		177
177	async_wait_for(req, &rc);	178	async_wait_for(req, &rc);
178	async_serialize_end();	179	async_serialize_end();
179	futex_up(&vfs_phone_futex);	180	futex_up(&vfs_phone_futex);
180	free(mpa);	181	free(mpa);
181		182
182	return (int) rc;	183	return (int) rc;
183	}	184	}
184		185
185	static int _open(const char *path, int lflag, int oflag, ...)	186	static int _open(const char *path, int lflag, int oflag, ...)
186	{	187	{
187	ipcarg_t rc;	188	ipcarg_t rc;
188	ipc_call_t answer;	189	ipc_call_t answer;
189	aid_t req;	190	aid_t req;
190		191
191	size_t pa_size;	192	size_t pa_size;
192	char *pa = absolutize(path, &pa_size);	193	char *pa = absolutize(path, &pa_size);
193	if (!pa)	194	if (!pa)
194	return ENOMEM;	195	return ENOMEM;
195		196
196	futex_down(&vfs_phone_futex);	197	futex_down(&vfs_phone_futex);
197	async_serialize_start();	198	async_serialize_start();
198	vfs_connect();	199	vfs_connect();
199		200
200	req = async_send_3(vfs_phone, VFS_OPEN, lflag, oflag, 0, &answer);	201	req = async_send_3(vfs_phone, VFS_OPEN, lflag, oflag, 0, &answer);
201	rc = ipc_data_write_start(vfs_phone, pa, pa_size);	202	rc = ipc_data_write_start(vfs_phone, pa, pa_size);
202	if (rc != EOK) {	203	if (rc != EOK) {
203	async_wait_for(req, NULL);	204	async_wait_for(req, NULL);
204	async_serialize_end();	205	async_serialize_end();
205	futex_up(&vfs_phone_futex);	206	futex_up(&vfs_phone_futex);
206	free(pa);	207	free(pa);
207	return (int) rc;	208	return (int) rc;
208	}	209	}
209	async_wait_for(req, &rc);	210	async_wait_for(req, &rc);
210	async_serialize_end();	211	async_serialize_end();
211	futex_up(&vfs_phone_futex);	212	futex_up(&vfs_phone_futex);
212	free(pa);	213	free(pa);
213		214
214	if (rc != EOK)	215	if (rc != EOK)
215	return (int) rc;	216	return (int) rc;
-		217
216	return (int) IPC_GET_ARG1(answer);	218	return (int) IPC_GET_ARG1(answer);
217	}	219	}
218		220
219	int open(const char *path, int oflag, ...)	221	int open(const char *path, int oflag, ...)
220	{	222	{
221	return _open(path, L_FILE, oflag);	223	return _open(path, L_FILE, oflag);
222	}	224	}
223		225
-		226	int open_node(fdi_node_t *node, int oflag)
-		227	{
-		228	futex_down(&vfs_phone_futex);
-		229	async_serialize_start();
-		230	vfs_connect();
-		231
-		232	ipc_call_t answer;
-		233	aid_t req = async_send_4(vfs_phone, VFS_OPEN_NODE, node->fs_handle,
-		234	node->dev_handle, node->index, oflag, &answer);
-		235
-		236	ipcarg_t rc;
-		237	async_wait_for(req, &rc);
-		238	async_serialize_end();
-		239	futex_up(&vfs_phone_futex);
-		240
-		241	if (rc != EOK)
-		242	return (int) rc;
-		243
-		244	return (int) IPC_GET_ARG1(answer);
-		245	}
-		246
224	int close(int fildes)	247	int close(int fildes)
225	{	248	{
226	ipcarg_t rc;	249	ipcarg_t rc;
227		250
228	futex_down(&vfs_phone_futex);	251	futex_down(&vfs_phone_futex);
229	async_serialize_start();	252	async_serialize_start();
230	vfs_connect();	253	vfs_connect();
231		254
232	rc = async_req_1_0(vfs_phone, VFS_CLOSE, fildes);	255	rc = async_req_1_0(vfs_phone, VFS_CLOSE, fildes);
233		256
234	async_serialize_end();	257	async_serialize_end();
235	futex_up(&vfs_phone_futex);	258	futex_up(&vfs_phone_futex);
236		259
237	return (int)rc;	260	return (int)rc;
238	}	261	}
239		262
240	ssize_t read(int fildes, void *buf, size_t nbyte)	263	ssize_t read(int fildes, void *buf, size_t nbyte)
241	{	264	{
242	ipcarg_t rc;	265	ipcarg_t rc;
243	ipc_call_t answer;	266	ipc_call_t answer;
244	aid_t req;	267	aid_t req;
245		268
246	futex_down(&vfs_phone_futex);	269	futex_down(&vfs_phone_futex);
247	async_serialize_start();	270	async_serialize_start();
248	vfs_connect();	271	vfs_connect();
249		272
250	req = async_send_1(vfs_phone, VFS_READ, fildes, &answer);	273	req = async_send_1(vfs_phone, VFS_READ, fildes, &answer);
251	rc = ipc_data_read_start(vfs_phone, (void *)buf, nbyte);	274	rc = ipc_data_read_start(vfs_phone, (void *)buf, nbyte);
252	if (rc != EOK) {	275	if (rc != EOK) {
253	async_wait_for(req, NULL);	276	async_wait_for(req, NULL);
254	async_serialize_end();	277	async_serialize_end();
255	futex_up(&vfs_phone_futex);	278	futex_up(&vfs_phone_futex);
256	return (ssize_t) rc;	279	return (ssize_t) rc;
257	}	280	}
258	async_wait_for(req, &rc);	281	async_wait_for(req, &rc);
259	async_serialize_end();	282	async_serialize_end();
260	futex_up(&vfs_phone_futex);	283	futex_up(&vfs_phone_futex);
261	if (rc == EOK)	284	if (rc == EOK)
262	return (ssize_t) IPC_GET_ARG1(answer);	285	return (ssize_t) IPC_GET_ARG1(answer);
263	else	286	else
264	return rc;	287	return rc;
265	}	288	}
266		289
267	ssize_t write(int fildes, const void *buf, size_t nbyte)	290	ssize_t write(int fildes, const void *buf, size_t nbyte)
268	{	291	{
269	ipcarg_t rc;	292	ipcarg_t rc;
270	ipc_call_t answer;	293	ipc_call_t answer;
271	aid_t req;	294	aid_t req;
272		295
273	futex_down(&vfs_phone_futex);	296	futex_down(&vfs_phone_futex);
274	async_serialize_start();	297	async_serialize_start();
275	vfs_connect();	298	vfs_connect();
276		299
277	req = async_send_1(vfs_phone, VFS_WRITE, fildes, &answer);	300	req = async_send_1(vfs_phone, VFS_WRITE, fildes, &answer);
278	rc = ipc_data_write_start(vfs_phone, (void *)buf, nbyte);	301	rc = ipc_data_write_start(vfs_phone, (void *)buf, nbyte);
279	if (rc != EOK) {	302	if (rc != EOK) {
280	async_wait_for(req, NULL);	303	async_wait_for(req, NULL);
281	async_serialize_end();	304	async_serialize_end();
282	futex_up(&vfs_phone_futex);	305	futex_up(&vfs_phone_futex);
283	return (ssize_t) rc;	306	return (ssize_t) rc;
284	}	307	}
285	async_wait_for(req, &rc);	308	async_wait_for(req, &rc);
286	async_serialize_end();	309	async_serialize_end();
287	futex_up(&vfs_phone_futex);	310	futex_up(&vfs_phone_futex);
288	if (rc == EOK)	311	if (rc == EOK)
289	return (ssize_t) IPC_GET_ARG1(answer);	312	return (ssize_t) IPC_GET_ARG1(answer);
290	else	313	else
291	return -1;	314	return -1;
292	}	315	}
293		316
-		317	int fd_phone(int fildes)
-		318	{
-		319	futex_down(&vfs_phone_futex);
-		320	async_serialize_start();
-		321	vfs_connect();
-		322
-		323	ipcarg_t device;
-		324	ipcarg_t rc = async_req_1_1(vfs_phone, VFS_DEVICE, fildes, &device);
-		325
-		326	async_serialize_end();
-		327	futex_up(&vfs_phone_futex);
-		328
-		329	if (rc != EOK)
-		330	return -1;
-		331
-		332	return devmap_device_connect((dev_handle_t) device, 0);
-		333	}
-		334
-		335	int fd_node(int fildes, fdi_node_t *node)
-		336	{
-		337	futex_down(&vfs_phone_futex);
-		338	async_serialize_start();
-		339	vfs_connect();
-		340
-		341	ipcarg_t fs_handle;
-		342	ipcarg_t dev_handle;
-		343	ipcarg_t index;
-		344	ipcarg_t rc = async_req_1_3(vfs_phone, VFS_NODE, fildes, &fs_handle,
-		345	&dev_handle, &index);
-		346
-		347	async_serialize_end();
-		348	futex_up(&vfs_phone_futex);
-		349
-		350	if (rc == EOK) {
-		351	node->fs_handle = (fs_handle_t) fs_handle;
-		352	node->dev_handle = (dev_handle_t) dev_handle;
-		353	node->index = (fs_index_t) index;
-		354	}
-		355
-		356	return rc;
-		357	}
-		358
-		359	int fsync(int fildes)
-		360	{
-		361	futex_down(&vfs_phone_futex);
-		362	async_serialize_start();
-		363	vfs_connect();
-		364
-		365	ipcarg_t rc = async_req_1_0(vfs_phone, VFS_SYNC, fildes);
-		366
-		367	async_serialize_end();
-		368	futex_up(&vfs_phone_futex);
-		369
-		370	return (int) rc;
-		371	}
-		372
294	off_t lseek(int fildes, off_t offset, int whence)	373	off_t lseek(int fildes, off_t offset, int whence)
295	{	374	{
296	ipcarg_t rc;	375	ipcarg_t rc;
297		376
298	futex_down(&vfs_phone_futex);	377	futex_down(&vfs_phone_futex);
299	async_serialize_start();	378	async_serialize_start();
300	vfs_connect();	379	vfs_connect();
301		380
302	ipcarg_t newoffs;	381	ipcarg_t newoffs;
303	rc = async_req_3_1(vfs_phone, VFS_SEEK, fildes, offset, whence,	382	rc = async_req_3_1(vfs_phone, VFS_SEEK, fildes, offset, whence,
304	&newoffs);	383	&newoffs);
305		384
306	async_serialize_end();	385	async_serialize_end();
307	futex_up(&vfs_phone_futex);	386	futex_up(&vfs_phone_futex);
308		387
309	if (rc != EOK)	388	if (rc != EOK)
310	return (off_t) -1;	389	return (off_t) -1;
311		390
312	return (off_t) newoffs;	391	return (off_t) newoffs;
313	}	392	}
314		393
315	int ftruncate(int fildes, off_t length)	394	int ftruncate(int fildes, off_t length)
316	{	395	{
317	ipcarg_t rc;	396	ipcarg_t rc;
318		397
319	futex_down(&vfs_phone_futex);	398	futex_down(&vfs_phone_futex);
320	async_serialize_start();	399	async_serialize_start();
321	vfs_connect();	400	vfs_connect();
322		401
323	rc = async_req_2_0(vfs_phone, VFS_TRUNCATE, fildes, length);	402	rc = async_req_2_0(vfs_phone, VFS_TRUNCATE, fildes, length);
324	async_serialize_end();	403	async_serialize_end();
325	futex_up(&vfs_phone_futex);	404	futex_up(&vfs_phone_futex);
326	return (int) rc;	405	return (int) rc;
327	}	406	}
328		407
329	DIR opendir(const char dirname)	408	DIR opendir(const char dirname)
330	{	409	{
331	DIR *dirp = malloc(sizeof(DIR));	410	DIR *dirp = malloc(sizeof(DIR));
332	if (!dirp)	411	if (!dirp)
333	return NULL;	412	return NULL;
334	dirp->fd = _open(dirname, L_DIRECTORY, 0);	413	dirp->fd = _open(dirname, L_DIRECTORY, 0);
335	if (dirp->fd < 0) {	414	if (dirp->fd < 0) {
336	free(dirp);	415	free(dirp);
337	return NULL;	416	return NULL;
338	}	417	}
339	return dirp;	418	return dirp;
340	}	419	}
341		420
342	struct dirent readdir(DIR dirp)	421	struct dirent readdir(DIR dirp)
343	{	422	{
344	ssize_t len = read(dirp->fd, &dirp->res.d_name[0], NAME_MAX + 1);	423	ssize_t len = read(dirp->fd, &dirp->res.d_name[0], NAME_MAX + 1);
345	if (len <= 0)	424	if (len <= 0)
346	return NULL;	425	return NULL;
347	return &dirp->res;	426	return &dirp->res;
348	}	427	}
349		428
350	void rewinddir(DIR *dirp)	429	void rewinddir(DIR *dirp)
351	{	430	{
352	(void) lseek(dirp->fd, 0, SEEK_SET);	431	(void) lseek(dirp->fd, 0, SEEK_SET);
353	}	432	}
354		433
355	int closedir(DIR *dirp)	434	int closedir(DIR *dirp)
356	{	435	{
357	(void) close(dirp->fd);	436	(void) close(dirp->fd);
358	free(dirp);	437	free(dirp);
359	return 0;	438	return 0;
360	}	439	}
361		440
362	int mkdir(const char *path, mode_t mode)	441	int mkdir(const char *path, mode_t mode)
363	{	442	{
364	ipcarg_t rc;	443	ipcarg_t rc;
365	aid_t req;	444	aid_t req;
366		445
367	size_t pa_size;	446	size_t pa_size;
368	char *pa = absolutize(path, &pa_size);	447	char *pa = absolutize(path, &pa_size);
369	if (!pa)	448	if (!pa)
370	return ENOMEM;	449	return ENOMEM;
371		450
372	futex_down(&vfs_phone_futex);	451	futex_down(&vfs_phone_futex);
373	async_serialize_start();	452	async_serialize_start();
374	vfs_connect();	453	vfs_connect();
375		454
376	req = async_send_1(vfs_phone, VFS_MKDIR, mode, NULL);	455	req = async_send_1(vfs_phone, VFS_MKDIR, mode, NULL);
377	rc = ipc_data_write_start(vfs_phone, pa, pa_size);	456	rc = ipc_data_write_start(vfs_phone, pa, pa_size);
378	if (rc != EOK) {	457	if (rc != EOK) {
379	async_wait_for(req, NULL);	458	async_wait_for(req, NULL);
380	async_serialize_end();	459	async_serialize_end();
381	futex_up(&vfs_phone_futex);	460	futex_up(&vfs_phone_futex);
382	free(pa);	461	free(pa);
383	return (int) rc;	462	return (int) rc;
384	}	463	}
385	async_wait_for(req, &rc);	464	async_wait_for(req, &rc);
386	async_serialize_end();	465	async_serialize_end();
387	futex_up(&vfs_phone_futex);	466	futex_up(&vfs_phone_futex);
388	free(pa);	467	free(pa);
389	return rc;	468	return rc;
390	}	469	}
391		470
392	static int _unlink(const char *path, int lflag)	471	static int _unlink(const char *path, int lflag)
393	{	472	{
394	ipcarg_t rc;	473	ipcarg_t rc;
395	aid_t req;	474	aid_t req;
396		475
397	size_t pa_size;	476	size_t pa_size;
398	char *pa = absolutize(path, &pa_size);	477	char *pa = absolutize(path, &pa_size);
399	if (!pa)	478	if (!pa)
400	return ENOMEM;	479	return ENOMEM;
401		480
402	futex_down(&vfs_phone_futex);	481	futex_down(&vfs_phone_futex);
403	async_serialize_start();	482	async_serialize_start();
404	vfs_connect();	483	vfs_connect();
405		484
406	req = async_send_0(vfs_phone, VFS_UNLINK, NULL);	485	req = async_send_0(vfs_phone, VFS_UNLINK, NULL);
407	rc = ipc_data_write_start(vfs_phone, pa, pa_size);	486	rc = ipc_data_write_start(vfs_phone, pa, pa_size);
408	if (rc != EOK) {	487	if (rc != EOK) {
409	async_wait_for(req, NULL);	488	async_wait_for(req, NULL);
410	async_serialize_end();	489	async_serialize_end();
411	futex_up(&vfs_phone_futex);	490	futex_up(&vfs_phone_futex);
412	free(pa);	491	free(pa);
413	return (int) rc;	492	return (int) rc;
414	}	493	}
415	async_wait_for(req, &rc);	494	async_wait_for(req, &rc);
416	async_serialize_end();	495	async_serialize_end();
417	futex_up(&vfs_phone_futex);	496	futex_up(&vfs_phone_futex);
418	free(pa);	497	free(pa);
419	return rc;	498	return rc;
420	}	499	}

Subversion Repositories HelenOS

(root)/branches/dd/uspace/lib/libc/generic/vfs/vfs.c – Rev 4420 → 4537