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| Rev | Author | Line No. | Line |
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| 2671 | jermar | 1 | /* |
| 2684 | jermar | 2 | * Copyright (c) 2008 Jakub Jermar |
| 2671 | jermar | 3 | * All rights reserved. |
| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 29 | /** @addtogroup libc |
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| 30 | * @{ |
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| 31 | */ |
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| 32 | /** @file |
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| 33 | */ |
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| 34 | |||
| 35 | #include <vfs.h> |
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| 2674 | jermar | 36 | #include <unistd.h> |
| 37 | #include <fcntl.h> |
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| 2671 | jermar | 38 | #include <ipc/ipc.h> |
| 39 | #include <ipc/services.h> |
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| 40 | #include <async.h> |
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| 41 | #include <atomic.h> |
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| 42 | #include <futex.h> |
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| 43 | #include <errno.h> |
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| 44 | #include <string.h> |
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| 45 | #include "../../srv/vfs/vfs.h" |
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| 46 | |||
| 47 | int vfs_phone = -1; |
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| 48 | atomic_t vfs_phone_futex = FUTEX_INITIALIZER; |
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| 49 | |||
| 50 | static int vfs_connect(void) |
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| 51 | { |
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| 52 | if (vfs_phone < 0) |
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| 53 | vfs_phone = ipc_connect_me_to(PHONE_NS, SERVICE_VFS, 0, 0); |
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| 54 | return vfs_phone; |
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| 55 | } |
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| 56 | |||
| 57 | int mount(const char *fs_name, const char *mp, const char *dev) |
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| 58 | { |
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| 59 | int res; |
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| 60 | ipcarg_t rc; |
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| 61 | aid_t req; |
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| 62 | |||
| 63 | int dev_handle = 0; /* TODO */ |
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| 64 | |||
| 65 | futex_down(&vfs_phone_futex); |
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| 66 | async_serialize_start(); |
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| 67 | if (vfs_phone < 0) { |
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| 68 | res = vfs_connect(); |
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| 69 | if (res < 0) { |
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| 70 | async_serialize_end(); |
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| 71 | futex_up(&vfs_phone_futex); |
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| 72 | return res; |
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| 73 | } |
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| 74 | } |
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| 75 | req = async_send_1(vfs_phone, VFS_MOUNT, dev_handle, NULL); |
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| 2678 | jermar | 76 | rc = ipc_data_write_start(vfs_phone, (void *)fs_name, strlen(fs_name)); |
| 2671 | jermar | 77 | if (rc != EOK) { |
| 78 | async_wait_for(req, NULL); |
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| 79 | async_serialize_end(); |
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| 80 | futex_up(&vfs_phone_futex); |
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| 81 | return (int) rc; |
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| 82 | } |
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| 2678 | jermar | 83 | rc = ipc_data_write_start(vfs_phone, (void *)mp, strlen(mp)); |
| 2671 | jermar | 84 | if (rc != EOK) { |
| 85 | async_wait_for(req, NULL); |
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| 86 | async_serialize_end(); |
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| 87 | futex_up(&vfs_phone_futex); |
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| 88 | return (int) rc; |
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| 89 | } |
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| 90 | async_wait_for(req, &rc); |
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| 91 | async_serialize_end(); |
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| 92 | futex_up(&vfs_phone_futex); |
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| 93 | return (int) rc; |
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| 94 | } |
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| 95 | |||
| 96 | |||
| 97 | int open(const char *name, int oflag, ...) |
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| 98 | { |
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| 99 | int res; |
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| 100 | ipcarg_t rc; |
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| 101 | ipc_call_t answer; |
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| 102 | aid_t req; |
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| 103 | |||
| 104 | futex_down(&vfs_phone_futex); |
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| 105 | async_serialize_start(); |
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| 106 | if (vfs_phone < 0) { |
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| 107 | res = vfs_connect(); |
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| 108 | if (res < 0) { |
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| 109 | async_serialize_end(); |
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| 110 | futex_up(&vfs_phone_futex); |
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| 111 | return res; |
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| 112 | } |
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| 113 | } |
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| 114 | req = async_send_2(vfs_phone, VFS_OPEN, oflag, 0, &answer); |
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| 2678 | jermar | 115 | rc = ipc_data_write_start(vfs_phone, name, strlen(name)); |
| 2671 | jermar | 116 | if (rc != EOK) { |
| 117 | async_wait_for(req, NULL); |
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| 118 | async_serialize_end(); |
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| 119 | futex_up(&vfs_phone_futex); |
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| 120 | return (int) rc; |
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| 121 | } |
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| 122 | async_wait_for(req, &rc); |
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| 123 | async_serialize_end(); |
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| 124 | futex_up(&vfs_phone_futex); |
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| 125 | return (int) IPC_GET_ARG1(answer); |
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| 126 | } |
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| 127 | |||
| 128 | ssize_t read(int fildes, void *buf, size_t nbyte) |
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| 129 | { |
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| 130 | int res; |
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| 131 | ipcarg_t rc; |
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| 132 | ipc_call_t answer; |
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| 133 | aid_t req; |
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| 134 | |||
| 135 | futex_down(&vfs_phone_futex); |
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| 136 | async_serialize_start(); |
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| 137 | if (vfs_phone < 0) { |
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| 138 | res = vfs_connect(); |
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| 139 | if (res < 0) { |
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| 140 | async_serialize_end(); |
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| 141 | futex_up(&vfs_phone_futex); |
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| 142 | return res; |
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| 143 | } |
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| 144 | } |
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| 2674 | jermar | 145 | req = async_send_1(vfs_phone, VFS_READ, fildes, &answer); |
| 2678 | jermar | 146 | if (ipc_data_read_start(vfs_phone, (void *)buf, nbyte) != EOK) { |
| 2671 | jermar | 147 | async_wait_for(req, NULL); |
| 148 | async_serialize_end(); |
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| 149 | futex_up(&vfs_phone_futex); |
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| 150 | return (ssize_t) rc; |
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| 151 | } |
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| 152 | async_wait_for(req, &rc); |
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| 153 | async_serialize_end(); |
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| 154 | futex_up(&vfs_phone_futex); |
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| 155 | return (ssize_t) IPC_GET_ARG1(answer); |
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| 156 | } |
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| 157 | |||
| 2674 | jermar | 158 | ssize_t write(int fildes, const void *buf, size_t nbyte) |
| 159 | { |
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| 160 | int res; |
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| 161 | ipcarg_t rc; |
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| 162 | ipc_call_t answer; |
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| 163 | aid_t req; |
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| 164 | |||
| 165 | futex_down(&vfs_phone_futex); |
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| 166 | async_serialize_start(); |
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| 167 | if (vfs_phone < 0) { |
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| 168 | res = vfs_connect(); |
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| 169 | if (res < 0) { |
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| 170 | async_serialize_end(); |
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| 171 | futex_up(&vfs_phone_futex); |
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| 172 | return res; |
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| 173 | } |
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| 174 | } |
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| 175 | req = async_send_1(vfs_phone, VFS_WRITE, fildes, &answer); |
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| 2678 | jermar | 176 | if (ipc_data_write_start(vfs_phone, (void *)buf, nbyte) != EOK) { |
| 2674 | jermar | 177 | async_wait_for(req, NULL); |
| 178 | async_serialize_end(); |
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| 179 | futex_up(&vfs_phone_futex); |
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| 180 | return (ssize_t) rc; |
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| 181 | } |
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| 182 | async_wait_for(req, &rc); |
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| 183 | async_serialize_end(); |
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| 184 | futex_up(&vfs_phone_futex); |
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| 185 | return (ssize_t) IPC_GET_ARG1(answer); |
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| 186 | } |
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| 2684 | jermar | 187 | |
| 188 | off_t lseek(int fildes, off_t offset, int whence) |
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| 189 | { |
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| 190 | int res; |
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| 191 | ipcarg_t rc; |
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| 192 | |||
| 193 | futex_down(&vfs_phone_futex); |
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| 194 | async_serialize_start(); |
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| 195 | if (vfs_phone < 0) { |
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| 196 | res = vfs_connect(); |
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| 197 | if (res < 0) { |
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| 198 | async_serialize_end(); |
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| 199 | futex_up(&vfs_phone_futex); |
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| 200 | return res; |
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| 201 | } |
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| 202 | } |
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| 203 | |||
| 204 | off_t newoffs; |
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| 205 | rc = async_req_3_1(vfs_phone, VFS_SEEK, fildes, offset, whence, |
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| 206 | &newoffs); |
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| 207 | |||
| 208 | async_serialize_end(); |
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| 209 | futex_up(&vfs_phone_futex); |
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| 210 | |||
| 211 | if (rc != EOK) |
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| 212 | return (off_t) -1; |
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| 213 | |||
| 214 | return newoffs; |
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| 215 | } |
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| 216 | |||
| 2671 | jermar | 217 | /** @} |
| 218 | */ |