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  1. /*
  2.  * Copyright (c) 2008 Jakub Jermar
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  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
  15.  *   derived from this software without specific prior written permission.
  16.  *
  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
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  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
  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
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup libc
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #include <vfs.h>
  36. #include <stdlib.h>
  37. #include <unistd.h>
  38. #include <dirent.h>
  39. #include <fcntl.h>
  40. #include <sys/stat.h>
  41. #include <sys/types.h>
  42. #include <ipc/ipc.h>
  43. #include <ipc/services.h>
  44. #include <async.h>
  45. #include <atomic.h>
  46. #include <futex.h>
  47. #include <errno.h>
  48. #include <string.h>
  49. #include "../../srv/vfs/vfs.h"
  50.  
  51. int vfs_phone = -1;
  52. atomic_t vfs_phone_futex = FUTEX_INITIALIZER;
  53.  
  54. static int vfs_connect(void)
  55. {
  56.     if (vfs_phone < 0)
  57.         vfs_phone = ipc_connect_me_to(PHONE_NS, SERVICE_VFS, 0, 0);
  58.     return vfs_phone;
  59. }
  60.  
  61. int mount(const char *fs_name, const char *mp, const char *dev)
  62. {
  63.     int res;
  64.     ipcarg_t rc;
  65.     aid_t req;
  66.  
  67.     int dev_handle = 0; /* TODO */
  68.  
  69.     futex_down(&vfs_phone_futex);
  70.     async_serialize_start();
  71.     if (vfs_phone < 0) {
  72.         res = vfs_connect();
  73.         if (res < 0) {
  74.             async_serialize_end();
  75.             futex_up(&vfs_phone_futex);
  76.             return res;
  77.         }
  78.     }
  79.     req = async_send_1(vfs_phone, VFS_MOUNT, dev_handle, NULL);
  80.     rc = ipc_data_write_start(vfs_phone, (void *)fs_name, strlen(fs_name));
  81.     if (rc != EOK) {
  82.         async_wait_for(req, NULL);
  83.         async_serialize_end();
  84.         futex_up(&vfs_phone_futex);
  85.         return (int) rc;
  86.     }
  87.     rc = ipc_data_write_start(vfs_phone, (void *)mp, strlen(mp));
  88.     if (rc != EOK) {
  89.         async_wait_for(req, NULL);
  90.         async_serialize_end();
  91.         futex_up(&vfs_phone_futex);
  92.         return (int) rc;
  93.     }
  94.     async_wait_for(req, &rc);
  95.     async_serialize_end();
  96.     futex_up(&vfs_phone_futex);
  97.     return (int) rc;
  98. }
  99.  
  100. static int _open(const char *path, int lflag, int oflag, ...)
  101. {
  102.     int res;
  103.     ipcarg_t rc;
  104.     ipc_call_t answer;
  105.     aid_t req;
  106.    
  107.     futex_down(&vfs_phone_futex);
  108.     async_serialize_start();
  109.     if (vfs_phone < 0) {
  110.         res = vfs_connect();
  111.         if (res < 0) {
  112.             async_serialize_end();
  113.             futex_up(&vfs_phone_futex);
  114.             return res;
  115.         }
  116.     }
  117.     req = async_send_3(vfs_phone, VFS_OPEN, lflag, oflag, 0, &answer);
  118.     rc = ipc_data_write_start(vfs_phone, path, strlen(path));
  119.     if (rc != EOK) {
  120.         async_wait_for(req, NULL);
  121.         async_serialize_end();
  122.         futex_up(&vfs_phone_futex);
  123.         return (int) rc;
  124.     }
  125.     async_wait_for(req, &rc);
  126.     async_serialize_end();
  127.     futex_up(&vfs_phone_futex);
  128.     return (int) IPC_GET_ARG1(answer);
  129. }
  130.  
  131. int open(const char *path, int oflag, ...)
  132. {
  133.     return _open(path, L_FILE, oflag);
  134. }
  135.  
  136. int close(int fildes)
  137. {
  138.     return 0;   /* TODO */
  139. }
  140.  
  141. ssize_t read(int fildes, void *buf, size_t nbyte)
  142. {
  143.     int res;
  144.     ipcarg_t rc;
  145.     ipc_call_t answer;
  146.     aid_t req;
  147.  
  148.     futex_down(&vfs_phone_futex);
  149.     async_serialize_start();
  150.     if (vfs_phone < 0) {
  151.         res = vfs_connect();
  152.         if (res < 0) {
  153.             async_serialize_end();
  154.             futex_up(&vfs_phone_futex);
  155.             return res;
  156.         }
  157.     }
  158.     req = async_send_1(vfs_phone, VFS_READ, fildes, &answer);
  159.     if (ipc_data_read_start(vfs_phone, (void *)buf, nbyte) != EOK) {
  160.         async_wait_for(req, NULL);
  161.         async_serialize_end();
  162.         futex_up(&vfs_phone_futex);
  163.         return (ssize_t) rc;
  164.     }
  165.     async_wait_for(req, &rc);
  166.     async_serialize_end();
  167.     futex_up(&vfs_phone_futex);
  168.     if (rc == EOK)
  169.         return (ssize_t) IPC_GET_ARG1(answer);
  170.     else
  171.         return -1;
  172. }
  173.  
  174. ssize_t write(int fildes, const void *buf, size_t nbyte)
  175. {
  176.     int res;
  177.     ipcarg_t rc;
  178.     ipc_call_t answer;
  179.     aid_t req;
  180.  
  181.     futex_down(&vfs_phone_futex);
  182.     async_serialize_start();
  183.     if (vfs_phone < 0) {
  184.         res = vfs_connect();
  185.         if (res < 0) {
  186.             async_serialize_end();
  187.             futex_up(&vfs_phone_futex);
  188.             return res;
  189.         }
  190.     }
  191.     req = async_send_1(vfs_phone, VFS_WRITE, fildes, &answer);
  192.     if (ipc_data_write_start(vfs_phone, (void *)buf, nbyte) != EOK) {
  193.         async_wait_for(req, NULL);
  194.         async_serialize_end();
  195.         futex_up(&vfs_phone_futex);
  196.         return (ssize_t) rc;
  197.     }
  198.     async_wait_for(req, &rc);
  199.     async_serialize_end();
  200.     futex_up(&vfs_phone_futex);
  201.     if (rc == EOK)
  202.         return (ssize_t) IPC_GET_ARG1(answer);
  203.     else
  204.         return -1;
  205. }
  206.  
  207. off_t lseek(int fildes, off_t offset, int whence)
  208. {
  209.     int res;
  210.     ipcarg_t rc;
  211.  
  212.     futex_down(&vfs_phone_futex);
  213.     async_serialize_start();
  214.     if (vfs_phone < 0) {
  215.         res = vfs_connect();
  216.         if (res < 0) {
  217.             async_serialize_end();
  218.             futex_up(&vfs_phone_futex);
  219.             return res;
  220.         }
  221.     }
  222.        
  223.     off_t newoffs;
  224.     rc = async_req_3_1(vfs_phone, VFS_SEEK, fildes, offset, whence,
  225.         (ipcarg_t)&newoffs);
  226.  
  227.     async_serialize_end();
  228.     futex_up(&vfs_phone_futex);
  229.  
  230.     if (rc != EOK)
  231.         return (off_t) -1;
  232.    
  233.     return newoffs;
  234. }
  235.  
  236. int ftruncate(int fildes, off_t length)
  237. {
  238.     int res;
  239.     ipcarg_t rc;
  240.    
  241.     futex_down(&vfs_phone_futex);
  242.     async_serialize_start();
  243.     if (vfs_phone < 0) {
  244.         res = vfs_connect();
  245.         if (res < 0) {
  246.             async_serialize_end();
  247.             futex_up(&vfs_phone_futex);
  248.             return res;
  249.         }
  250.     }
  251.     rc = async_req_2_0(vfs_phone, VFS_TRUNCATE, fildes, length);
  252.     async_serialize_end();
  253.     futex_up(&vfs_phone_futex);
  254.     return (int) rc;
  255. }
  256.  
  257. DIR *opendir(const char *dirname)
  258. {
  259.     DIR *dirp = malloc(sizeof(DIR));
  260.     if (!dirp)
  261.         return NULL;
  262.     dirp->fd = _open(dirname, L_DIRECTORY, 0);
  263.     if (dirp->fd < 0) {
  264.         free(dirp);
  265.         return NULL;
  266.     }
  267.     return dirp;
  268. }
  269.  
  270. struct dirent *readdir(DIR *dirp)
  271. {
  272.     ssize_t len = read(dirp->fd, &dirp->res.d_name[0], NAME_MAX + 1);
  273.     if (len <= 0)
  274.         return NULL;
  275.     return &dirp->res;
  276. }
  277.  
  278. void rewinddir(DIR *dirp)
  279. {
  280.     (void) lseek(dirp->fd, 0, SEEK_SET);
  281. }
  282.  
  283. int closedir(DIR *dirp)
  284. {
  285.     (void) close(dirp->fd);
  286.     free(dirp);
  287.     return 0;
  288. }
  289.  
  290. int mkdir(const char *path, mode_t mode)
  291. {
  292.     int res;
  293.     ipcarg_t rc;
  294.     ipc_call_t answer;
  295.     aid_t req;
  296.    
  297.     futex_down(&vfs_phone_futex);
  298.     async_serialize_start();
  299.     if (vfs_phone < 0) {
  300.         res = vfs_connect();
  301.         if (res < 0) {
  302.             async_serialize_end();
  303.             futex_up(&vfs_phone_futex);
  304.             return res;
  305.         }
  306.     }
  307.     req = async_send_1(vfs_phone, VFS_MKDIR, mode, &answer);
  308.     rc = ipc_data_write_start(vfs_phone, path, strlen(path));
  309.     if (rc != EOK) {
  310.         async_wait_for(req, NULL);
  311.         async_serialize_end();
  312.         futex_up(&vfs_phone_futex);
  313.         return (int) rc;
  314.     }
  315.     async_wait_for(req, &rc);
  316.     async_serialize_end();
  317.     futex_up(&vfs_phone_futex);
  318.     return EOK;
  319. }
  320.  
  321. /** @}
  322.  */
  323.