[a9fa9b7] | 1 | /* |
---|
| 2 | * COPYRIGHT (c) 2010 Chris Johns <chrisj@rtems.org> |
---|
| 3 | * |
---|
| 4 | * The license and distribution terms for this file may be |
---|
| 5 | * found in the file LICENSE in this distribution or at |
---|
| 6 | * http://www.rtems.com/license/LICENSE. |
---|
| 7 | * |
---|
| 8 | * $Id$ |
---|
| 9 | */ |
---|
| 10 | /** |
---|
| 11 | * @file |
---|
| 12 | * |
---|
| 13 | * @ingroup rtems-rfs |
---|
| 14 | * |
---|
| 15 | * RTEMS RFS File Handlers |
---|
| 16 | * |
---|
| 17 | * This file contains the set of handlers used to process operations on |
---|
| 18 | * RFS file nodes. |
---|
| 19 | */ |
---|
| 20 | |
---|
[355b0544] | 21 | #if HAVE_CONFIG_H |
---|
| 22 | #include "config.h" |
---|
| 23 | #endif |
---|
| 24 | |
---|
[ca400296] | 25 | #include <inttypes.h> |
---|
| 26 | |
---|
[a9fa9b7] | 27 | #include <rtems/rfs/rtems-rfs-file.h> |
---|
| 28 | #include "rtems-rfs-rtems.h" |
---|
| 29 | |
---|
| 30 | /** |
---|
| 31 | * This routine processes the open() system call. Note that there is nothing |
---|
| 32 | * special to be done at open() time. |
---|
| 33 | * |
---|
| 34 | * @param iop |
---|
| 35 | * @param pathname |
---|
| 36 | * @param flag |
---|
| 37 | * @param mode |
---|
| 38 | * @return int |
---|
| 39 | */ |
---|
| 40 | |
---|
| 41 | static int |
---|
| 42 | rtems_rfs_rtems_file_open (rtems_libio_t* iop, |
---|
| 43 | const char* pathname, |
---|
| 44 | uint32_t flag, |
---|
| 45 | uint32_t mode) |
---|
| 46 | { |
---|
| 47 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (&iop->pathinfo); |
---|
[3cfa636] | 48 | rtems_rfs_ino ino; |
---|
[a9fa9b7] | 49 | rtems_rfs_file_handle* file; |
---|
| 50 | uint32_t flags; |
---|
| 51 | int rc; |
---|
| 52 | |
---|
| 53 | flags = 0; |
---|
| 54 | |
---|
| 55 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_FILE_OPEN)) |
---|
[ca400296] | 56 | printf("rtems-rfs: file-open: path:%s ino:%" PRId32 " flags:%04" PRIx32 " mode:%04" PRIx32 "\n", |
---|
[a9fa9b7] | 57 | pathname, ino, flags, mode); |
---|
| 58 | |
---|
| 59 | rtems_rfs_rtems_lock (fs); |
---|
| 60 | |
---|
[3cfa636] | 61 | ino = rtems_rfs_rtems_get_iop_ino (iop); |
---|
| 62 | |
---|
[a9fa9b7] | 63 | rc = rtems_rfs_file_open (fs, ino, flags, &file); |
---|
| 64 | if (rc > 0) |
---|
| 65 | { |
---|
| 66 | rtems_rfs_rtems_unlock (fs); |
---|
| 67 | return rtems_rfs_rtems_error ("file-open: open", rc); |
---|
| 68 | } |
---|
| 69 | |
---|
| 70 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_FILE_OPEN)) |
---|
| 71 | printf("rtems-rfs: file-open: handle:%p\n", file); |
---|
| 72 | |
---|
[d0fcd0b] | 73 | iop->size = rtems_rfs_file_size (file); |
---|
[59762469] | 74 | rtems_rfs_rtems_set_iop_file_handle (iop, file); |
---|
[a9fa9b7] | 75 | |
---|
| 76 | rtems_rfs_rtems_unlock (fs); |
---|
| 77 | return 0; |
---|
| 78 | } |
---|
| 79 | |
---|
| 80 | /** |
---|
| 81 | * This routine processes the close() system call. Note that there is nothing |
---|
| 82 | * to flush at this point. |
---|
| 83 | * |
---|
| 84 | * @param iop |
---|
| 85 | * @return int |
---|
| 86 | */ |
---|
| 87 | static int |
---|
| 88 | rtems_rfs_rtems_file_close (rtems_libio_t* iop) |
---|
| 89 | { |
---|
[59762469] | 90 | rtems_rfs_file_handle* file = rtems_rfs_rtems_get_iop_file_handle (iop); |
---|
[a9fa9b7] | 91 | rtems_rfs_file_system* fs = rtems_rfs_file_fs (file); |
---|
| 92 | int rc; |
---|
| 93 | |
---|
| 94 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_FILE_CLOSE)) |
---|
| 95 | printf("rtems-rfs: file-close: handle:%p\n", file); |
---|
| 96 | |
---|
| 97 | rtems_rfs_rtems_lock (fs); |
---|
| 98 | |
---|
| 99 | rc = rtems_rfs_file_close (fs, file); |
---|
| 100 | if (rc > 0) |
---|
| 101 | rc = rtems_rfs_rtems_error ("file-close: file close", rc); |
---|
| 102 | |
---|
| 103 | rtems_rfs_rtems_unlock (fs); |
---|
[6dd4853c] | 104 | return rc; |
---|
[a9fa9b7] | 105 | } |
---|
| 106 | |
---|
| 107 | /** |
---|
| 108 | * This routine processes the read() system call. |
---|
| 109 | * |
---|
| 110 | * @param iop |
---|
| 111 | * @param buffer |
---|
| 112 | * @param count |
---|
| 113 | * @return int |
---|
| 114 | */ |
---|
[d0fcd0b] | 115 | static ssize_t |
---|
[a9fa9b7] | 116 | rtems_rfs_rtems_file_read (rtems_libio_t* iop, |
---|
| 117 | void* buffer, |
---|
| 118 | size_t count) |
---|
| 119 | { |
---|
[59762469] | 120 | rtems_rfs_file_handle* file = rtems_rfs_rtems_get_iop_file_handle (iop); |
---|
[3cfa636] | 121 | rtems_rfs_pos pos; |
---|
[a9fa9b7] | 122 | uint8_t* data = buffer; |
---|
| 123 | ssize_t read = 0; |
---|
| 124 | int rc; |
---|
| 125 | |
---|
| 126 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_FILE_READ)) |
---|
[5fe3834] | 127 | printf("rtems-rfs: file-read: handle:%p count:%zd\n", file, count); |
---|
[a9fa9b7] | 128 | |
---|
| 129 | rtems_rfs_rtems_lock (rtems_rfs_file_fs (file)); |
---|
| 130 | |
---|
[3cfa636] | 131 | pos = iop->offset; |
---|
| 132 | |
---|
[a9fa9b7] | 133 | if (pos < rtems_rfs_file_size (file)) |
---|
| 134 | { |
---|
| 135 | while (count) |
---|
| 136 | { |
---|
| 137 | size_t size; |
---|
| 138 | |
---|
| 139 | rc = rtems_rfs_file_io_start (file, &size, true); |
---|
| 140 | if (rc > 0) |
---|
| 141 | { |
---|
| 142 | read = rtems_rfs_rtems_error ("file-read: read: io-start", rc); |
---|
| 143 | break; |
---|
| 144 | } |
---|
| 145 | |
---|
| 146 | if (size == 0) |
---|
| 147 | break; |
---|
| 148 | |
---|
| 149 | if (size > count) |
---|
| 150 | size = count; |
---|
| 151 | |
---|
| 152 | memcpy (data, rtems_rfs_file_data (file), size); |
---|
| 153 | |
---|
| 154 | data += size; |
---|
| 155 | count -= size; |
---|
| 156 | read += size; |
---|
| 157 | |
---|
| 158 | rc = rtems_rfs_file_io_end (file, size, true); |
---|
| 159 | if (rc > 0) |
---|
| 160 | { |
---|
| 161 | read = rtems_rfs_rtems_error ("file-read: read: io-end", rc); |
---|
| 162 | break; |
---|
| 163 | } |
---|
| 164 | } |
---|
| 165 | } |
---|
| 166 | |
---|
| 167 | rtems_rfs_rtems_unlock (rtems_rfs_file_fs (file)); |
---|
| 168 | |
---|
| 169 | return read; |
---|
| 170 | } |
---|
| 171 | |
---|
| 172 | /** |
---|
| 173 | * This routine processes the write() system call. |
---|
| 174 | * |
---|
| 175 | * @param iop |
---|
| 176 | * @param buffer |
---|
| 177 | * @param count |
---|
| 178 | * @return ssize_t |
---|
| 179 | */ |
---|
[d0fcd0b] | 180 | static ssize_t |
---|
[a9fa9b7] | 181 | rtems_rfs_rtems_file_write (rtems_libio_t* iop, |
---|
| 182 | const void* buffer, |
---|
| 183 | size_t count) |
---|
| 184 | { |
---|
[59762469] | 185 | rtems_rfs_file_handle* file = rtems_rfs_rtems_get_iop_file_handle (iop); |
---|
[3cfa636] | 186 | rtems_rfs_pos pos; |
---|
[a9fa9b7] | 187 | const uint8_t* data = buffer; |
---|
| 188 | ssize_t write = 0; |
---|
| 189 | int rc; |
---|
| 190 | |
---|
| 191 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_FILE_WRITE)) |
---|
[5fe3834] | 192 | printf("rtems-rfs: file-write: handle:%p count:%zd\n", file, count); |
---|
[a9fa9b7] | 193 | |
---|
| 194 | rtems_rfs_rtems_lock (rtems_rfs_file_fs (file)); |
---|
| 195 | |
---|
[3cfa636] | 196 | pos = iop->offset; |
---|
| 197 | |
---|
[a9fa9b7] | 198 | /* |
---|
[d0fcd0b] | 199 | * If the iop position is past the physical end of the file we need to set |
---|
| 200 | * the file size to the new length before writing. If the position equals the |
---|
| 201 | * size of file we are still past the end of the file as positions number |
---|
| 202 | * from 0. For a specific position we need a file that has a length of one |
---|
| 203 | * more. |
---|
[a9fa9b7] | 204 | */ |
---|
| 205 | |
---|
[d0fcd0b] | 206 | if (pos >= rtems_rfs_file_size (file)) |
---|
[a9fa9b7] | 207 | { |
---|
[d0fcd0b] | 208 | rc = rtems_rfs_file_set_size (file, pos + 1); |
---|
[a9fa9b7] | 209 | if (rc) |
---|
[6dd4853c] | 210 | { |
---|
| 211 | rtems_rfs_rtems_unlock (rtems_rfs_file_fs (file)); |
---|
[a9fa9b7] | 212 | return rtems_rfs_rtems_error ("file-write: write extend", rc); |
---|
[6dd4853c] | 213 | } |
---|
[a9fa9b7] | 214 | } |
---|
| 215 | |
---|
[d0fcd0b] | 216 | rtems_rfs_file_set_bpos (file, pos); |
---|
| 217 | |
---|
[a9fa9b7] | 218 | while (count) |
---|
| 219 | { |
---|
| 220 | size_t size = count; |
---|
| 221 | |
---|
| 222 | rc = rtems_rfs_file_io_start (file, &size, false); |
---|
| 223 | if (rc) |
---|
| 224 | { |
---|
| 225 | write = rtems_rfs_rtems_error ("file-write: write open", rc); |
---|
| 226 | break; |
---|
| 227 | } |
---|
| 228 | |
---|
| 229 | if (size > count) |
---|
| 230 | size = count; |
---|
| 231 | |
---|
| 232 | memcpy (rtems_rfs_file_data (file), data, size); |
---|
| 233 | |
---|
| 234 | data += size; |
---|
| 235 | count -= size; |
---|
| 236 | write += size; |
---|
| 237 | |
---|
| 238 | rc = rtems_rfs_file_io_end (file, size, false); |
---|
| 239 | if (rc) |
---|
| 240 | { |
---|
| 241 | write = rtems_rfs_rtems_error ("file-write: write close", rc); |
---|
| 242 | break; |
---|
| 243 | } |
---|
| 244 | } |
---|
| 245 | |
---|
| 246 | iop->size = rtems_rfs_file_size (file); |
---|
| 247 | |
---|
| 248 | rtems_rfs_rtems_unlock (rtems_rfs_file_fs (file)); |
---|
| 249 | |
---|
| 250 | return write; |
---|
| 251 | } |
---|
| 252 | |
---|
| 253 | /** |
---|
| 254 | * This routine processes the ioctl() system call. |
---|
| 255 | * |
---|
| 256 | * @note No ioctl()'s are currently supported for RFS files. |
---|
| 257 | * |
---|
| 258 | * @param iop |
---|
| 259 | * @param command |
---|
| 260 | * @param buffer |
---|
| 261 | */ |
---|
| 262 | |
---|
[d0fcd0b] | 263 | static int |
---|
[a9fa9b7] | 264 | rtems_rfs_rtems_file_ioctl (rtems_libio_t* iop, uint32_t command, void* buffer) |
---|
| 265 | { |
---|
| 266 | return 0; |
---|
| 267 | } |
---|
| 268 | |
---|
| 269 | /** |
---|
| 270 | * This routine processes the lseek() system call. |
---|
| 271 | * |
---|
| 272 | * @param iop |
---|
| 273 | * @param offset |
---|
| 274 | * @param whence |
---|
| 275 | * @return rtems_off64_t |
---|
| 276 | */ |
---|
[d0fcd0b] | 277 | static rtems_off64_t |
---|
[a9fa9b7] | 278 | rtems_rfs_rtems_file_lseek (rtems_libio_t* iop, |
---|
| 279 | rtems_off64_t offset, |
---|
| 280 | int whence) |
---|
| 281 | { |
---|
[59762469] | 282 | rtems_rfs_file_handle* file = rtems_rfs_rtems_get_iop_file_handle (iop); |
---|
[a9fa9b7] | 283 | rtems_rfs_pos pos; |
---|
| 284 | int rc; |
---|
| 285 | |
---|
| 286 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_FILE_LSEEK)) |
---|
| 287 | printf("rtems-rfs: file-lseek: handle:%p offset:%Ld\n", file, offset); |
---|
| 288 | |
---|
| 289 | rtems_rfs_rtems_lock (rtems_rfs_file_fs (file)); |
---|
| 290 | |
---|
[3cfa636] | 291 | pos = iop->offset; |
---|
| 292 | |
---|
[a9fa9b7] | 293 | rc = rtems_rfs_file_seek (file, pos, &pos); |
---|
| 294 | if (rc) |
---|
| 295 | { |
---|
| 296 | rtems_rfs_rtems_unlock (rtems_rfs_file_fs (file)); |
---|
| 297 | return rtems_rfs_rtems_error ("file_lseek: lseek", rc); |
---|
| 298 | } |
---|
| 299 | |
---|
| 300 | rtems_rfs_rtems_unlock (rtems_rfs_file_fs (file)); |
---|
| 301 | |
---|
| 302 | return iop->offset; |
---|
| 303 | } |
---|
| 304 | |
---|
| 305 | /** |
---|
| 306 | * This routine processes the ftruncate() system call. |
---|
| 307 | * |
---|
| 308 | * @param iop |
---|
| 309 | * @param length |
---|
| 310 | * @return int |
---|
| 311 | */ |
---|
[d0fcd0b] | 312 | static int |
---|
[a9fa9b7] | 313 | rtems_rfs_rtems_file_ftruncate (rtems_libio_t* iop, |
---|
| 314 | rtems_off64_t length) |
---|
| 315 | { |
---|
[59762469] | 316 | rtems_rfs_file_handle* file = rtems_rfs_rtems_get_iop_file_handle (iop); |
---|
[a9fa9b7] | 317 | int rc; |
---|
| 318 | |
---|
| 319 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_FILE_FTRUNC)) |
---|
| 320 | printf("rtems-rfs: file-ftrunc: handle:%p length:%Ld\n", file, length); |
---|
| 321 | |
---|
| 322 | rtems_rfs_rtems_lock (rtems_rfs_file_fs (file)); |
---|
[3cfa636] | 323 | |
---|
[a9fa9b7] | 324 | rc = rtems_rfs_file_set_size (file, length); |
---|
| 325 | if (rc) |
---|
| 326 | rc = rtems_rfs_rtems_error ("file_ftruncate: set size", rc); |
---|
| 327 | |
---|
| 328 | iop->size = rtems_rfs_file_size (file); |
---|
| 329 | |
---|
| 330 | rtems_rfs_rtems_unlock (rtems_rfs_file_fs (file)); |
---|
| 331 | |
---|
| 332 | return rc; |
---|
| 333 | } |
---|
| 334 | |
---|
| 335 | /* |
---|
| 336 | * Set of operations handlers for operations on RFS files. |
---|
| 337 | */ |
---|
| 338 | |
---|
| 339 | const rtems_filesystem_file_handlers_r rtems_rfs_rtems_file_handlers = { |
---|
| 340 | .open_h = rtems_rfs_rtems_file_open, |
---|
| 341 | .close_h = rtems_rfs_rtems_file_close, |
---|
| 342 | .read_h = rtems_rfs_rtems_file_read, |
---|
| 343 | .write_h = rtems_rfs_rtems_file_write, |
---|
| 344 | .ioctl_h = rtems_rfs_rtems_file_ioctl, |
---|
| 345 | .lseek_h = rtems_rfs_rtems_file_lseek, |
---|
[59762469] | 346 | .fstat_h = rtems_rfs_rtems_fstat, |
---|
| 347 | .fchmod_h = rtems_rfs_rtems_fchmod, |
---|
[a9fa9b7] | 348 | .ftruncate_h = rtems_rfs_rtems_file_ftruncate, |
---|
[962571e9] | 349 | .fpathconf_h = rtems_filesystem_default_fpathconf, |
---|
[a9fa9b7] | 350 | .fsync_h = rtems_rfs_rtems_fdatasync, |
---|
| 351 | .fdatasync_h = rtems_rfs_rtems_fdatasync, |
---|
[9788279] | 352 | .fcntl_h = rtems_filesystem_default_fcntl, |
---|
[a9fa9b7] | 353 | .rmnod_h = rtems_rfs_rtems_rmnod |
---|
| 354 | }; |
---|