Changeset 8ff0bd2 in mainline for uspace/srv/vfs/vfs_file.c
- Timestamp:
- 2011-09-04T11:30:58Z (13 years ago)
- Branches:
- lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export
- Children:
- 03bc76a
- Parents:
- d2c67e7 (diff), deac215e (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the(diff)
links above to see all the changes relative to each parent. - File:
-
- 1 edited
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- Unmodified
- Added
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uspace/srv/vfs/vfs_file.c
rd2c67e7 r8ff0bd2 43 43 #include <fibril.h> 44 44 #include <fibril_synch.h> 45 #include <adt/list.h> 46 #include <task.h> 45 47 #include "vfs.h" 46 48 … … 50 52 typedef struct { 51 53 fibril_mutex_t lock; 54 fibril_condvar_t cv; 55 list_t passed_handles; 52 56 vfs_file_t **files; 53 57 } vfs_client_data_t; 54 58 59 typedef struct { 60 link_t link; 61 int handle; 62 } vfs_boxed_handle_t; 63 64 static int _vfs_fd_free(vfs_client_data_t *, int); 65 55 66 /** Initialize the table of open files. */ 56 static bool vfs_files_init(v oid)57 { 58 fibril_mutex_lock(& VFS_DATA->lock);59 if (! FILES) {60 FILES= malloc(MAX_OPEN_FILES * sizeof(vfs_file_t *));61 if (! FILES) {62 fibril_mutex_unlock(& VFS_DATA->lock);67 static bool vfs_files_init(vfs_client_data_t *vfs_data) 68 { 69 fibril_mutex_lock(&vfs_data->lock); 70 if (!vfs_data->files) { 71 vfs_data->files = malloc(MAX_OPEN_FILES * sizeof(vfs_file_t *)); 72 if (!vfs_data->files) { 73 fibril_mutex_unlock(&vfs_data->lock); 63 74 return false; 64 75 } 65 memset( FILES, 0, MAX_OPEN_FILES * sizeof(vfs_file_t *));66 } 67 fibril_mutex_unlock(& VFS_DATA->lock);76 memset(vfs_data->files, 0, MAX_OPEN_FILES * sizeof(vfs_file_t *)); 77 } 78 fibril_mutex_unlock(&vfs_data->lock); 68 79 return true; 69 80 } 70 81 71 82 /** Cleanup the table of open files. */ 72 static void vfs_files_done(v oid)83 static void vfs_files_done(vfs_client_data_t *vfs_data) 73 84 { 74 85 int i; 75 86 76 if (! FILES)87 if (!vfs_data->files) 77 88 return; 78 89 79 90 for (i = 0; i < MAX_OPEN_FILES; i++) { 80 if (FILES[i]) { 81 (void) vfs_fd_free(i); 82 } 83 } 84 85 free(FILES); 91 if (vfs_data->files[i]) 92 (void) _vfs_fd_free(vfs_data, i); 93 } 94 95 free(vfs_data->files); 96 97 while (!list_empty(&vfs_data->passed_handles)) { 98 link_t *lnk; 99 vfs_boxed_handle_t *bh; 100 101 lnk = list_first(&vfs_data->passed_handles); 102 list_remove(lnk); 103 104 bh = list_get_instance(lnk, vfs_boxed_handle_t, link); 105 free(bh); 106 } 86 107 } 87 108 … … 93 114 if (vfs_data) { 94 115 fibril_mutex_initialize(&vfs_data->lock); 116 fibril_condvar_initialize(&vfs_data->cv); 117 list_initialize(&vfs_data->passed_handles); 95 118 vfs_data->files = NULL; 96 119 } … … 103 126 vfs_client_data_t *vfs_data = (vfs_client_data_t *) data; 104 127 105 vfs_files_done( );128 vfs_files_done(vfs_data); 106 129 free(vfs_data); 107 130 } … … 115 138 116 139 ipc_call_t answer; 117 aid_t msg = async_send_2(exch, VFS_OUT_CLOSE, file->node-> devmap_handle,140 aid_t msg = async_send_2(exch, VFS_OUT_CLOSE, file->node->service_id, 118 141 file->node->index, &answer); 119 142 … … 131 154 * incremented. 132 155 */ 133 static void vfs_file_addref(vfs_ file_t *file)134 { 135 assert(fibril_mutex_is_locked(& VFS_DATA->lock));156 static void vfs_file_addref(vfs_client_data_t *vfs_data, vfs_file_t *file) 157 { 158 assert(fibril_mutex_is_locked(&vfs_data->lock)); 136 159 137 160 file->refcnt++; … … 143 166 * decremented. 144 167 */ 145 static int vfs_file_delref(vfs_ file_t *file)168 static int vfs_file_delref(vfs_client_data_t *vfs_data, vfs_file_t *file) 146 169 { 147 170 int rc = EOK; 148 171 149 assert(fibril_mutex_is_locked(& VFS_DATA->lock));172 assert(fibril_mutex_is_locked(&vfs_data->lock)); 150 173 151 174 if (file->refcnt-- == 1) { … … 162 185 } 163 186 164 165 /** Allocate a file descriptor. 166 * 167 * @param desc If true, look for an available file descriptor 168 * in a descending order. 169 * 170 * @return First available file descriptor or a negative error 171 * code. 172 */ 173 int vfs_fd_alloc(bool desc) 174 { 175 if (!vfs_files_init()) 187 static int _vfs_fd_alloc(vfs_client_data_t *vfs_data, bool desc) 188 { 189 if (!vfs_files_init(vfs_data)) 176 190 return ENOMEM; 177 191 … … 182 196 i = 0; 183 197 184 fibril_mutex_lock(& VFS_DATA->lock);198 fibril_mutex_lock(&vfs_data->lock); 185 199 while (true) { 186 if (! FILES[i]) {187 FILES[i] = (vfs_file_t *) malloc(sizeof(vfs_file_t));188 if (! FILES[i]) {189 fibril_mutex_unlock(& VFS_DATA->lock);200 if (!vfs_data->files[i]) { 201 vfs_data->files[i] = (vfs_file_t *) malloc(sizeof(vfs_file_t)); 202 if (!vfs_data->files[i]) { 203 fibril_mutex_unlock(&vfs_data->lock); 190 204 return ENOMEM; 191 205 } 192 206 193 memset( FILES[i], 0, sizeof(vfs_file_t));194 fibril_mutex_initialize(& FILES[i]->lock);195 vfs_file_addref( FILES[i]);196 fibril_mutex_unlock(& VFS_DATA->lock);207 memset(vfs_data->files[i], 0, sizeof(vfs_file_t)); 208 fibril_mutex_initialize(&vfs_data->files[i]->lock); 209 vfs_file_addref(vfs_data, vfs_data->files[i]); 210 fibril_mutex_unlock(&vfs_data->lock); 197 211 return (int) i; 198 212 } … … 210 224 } 211 225 } 212 fibril_mutex_unlock(& VFS_DATA->lock);226 fibril_mutex_unlock(&vfs_data->lock); 213 227 214 228 return EMFILE; 229 } 230 231 /** Allocate a file descriptor. 232 * 233 * @param desc If true, look for an available file descriptor 234 * in a descending order. 235 * 236 * @return First available file descriptor or a negative error 237 * code. 238 */ 239 int vfs_fd_alloc(bool desc) 240 { 241 return _vfs_fd_alloc(VFS_DATA, desc); 242 } 243 244 static int _vfs_fd_free(vfs_client_data_t *vfs_data, int fd) 245 { 246 int rc; 247 248 if (!vfs_files_init(vfs_data)) 249 return ENOMEM; 250 251 fibril_mutex_lock(&vfs_data->lock); 252 if ((fd < 0) || (fd >= MAX_OPEN_FILES) || !vfs_data->files[fd]) { 253 fibril_mutex_unlock(&vfs_data->lock); 254 return EBADF; 255 } 256 257 rc = vfs_file_delref(vfs_data, vfs_data->files[fd]); 258 vfs_data->files[fd] = NULL; 259 fibril_mutex_unlock(&vfs_data->lock); 260 261 return rc; 215 262 } 216 263 … … 224 271 int vfs_fd_free(int fd) 225 272 { 226 int rc; 227 228 if (!vfs_files_init()) 229 return ENOMEM; 230 231 fibril_mutex_lock(&VFS_DATA->lock); 232 if ((fd < 0) || (fd >= MAX_OPEN_FILES) || (FILES[fd] == NULL)) { 233 fibril_mutex_unlock(&VFS_DATA->lock); 234 return EBADF; 235 } 236 237 rc = vfs_file_delref(FILES[fd]); 238 FILES[fd] = NULL; 239 fibril_mutex_unlock(&VFS_DATA->lock); 240 241 return rc; 273 return _vfs_fd_free(VFS_DATA, fd); 242 274 } 243 275 … … 253 285 int vfs_fd_assign(vfs_file_t *file, int fd) 254 286 { 255 if (!vfs_files_init( ))287 if (!vfs_files_init(VFS_DATA)) 256 288 return ENOMEM; 257 289 … … 263 295 264 296 FILES[fd] = file; 265 vfs_file_addref( FILES[fd]);297 vfs_file_addref(VFS_DATA, FILES[fd]); 266 298 fibril_mutex_unlock(&VFS_DATA->lock); 267 299 … … 269 301 } 270 302 271 /** Find VFS file structure for a given file descriptor. 272 * 273 * @param fd File descriptor. 274 * 275 * @return VFS file structure corresponding to fd. 276 */ 277 vfs_file_t *vfs_file_get(int fd) 278 { 279 if (!vfs_files_init()) 303 static vfs_file_t *_vfs_file_get(vfs_client_data_t *vfs_data, int fd) 304 { 305 if (!vfs_files_init(vfs_data)) 280 306 return NULL; 281 307 282 fibril_mutex_lock(& VFS_DATA->lock);308 fibril_mutex_lock(&vfs_data->lock); 283 309 if ((fd >= 0) && (fd < MAX_OPEN_FILES)) { 284 vfs_file_t *file = FILES[fd];310 vfs_file_t *file = vfs_data->files[fd]; 285 311 if (file != NULL) { 286 vfs_file_addref( file);287 fibril_mutex_unlock(& VFS_DATA->lock);312 vfs_file_addref(vfs_data, file); 313 fibril_mutex_unlock(&vfs_data->lock); 288 314 return file; 289 315 } 290 316 } 291 fibril_mutex_unlock(& VFS_DATA->lock);317 fibril_mutex_unlock(&vfs_data->lock); 292 318 293 319 return NULL; 294 320 } 295 321 322 /** Find VFS file structure for a given file descriptor. 323 * 324 * @param fd File descriptor. 325 * 326 * @return VFS file structure corresponding to fd. 327 */ 328 vfs_file_t *vfs_file_get(int fd) 329 { 330 return _vfs_file_get(VFS_DATA, fd); 331 } 332 333 static void _vfs_file_put(vfs_client_data_t *vfs_data, vfs_file_t *file) 334 { 335 fibril_mutex_lock(&vfs_data->lock); 336 vfs_file_delref(vfs_data, file); 337 fibril_mutex_unlock(&vfs_data->lock); 338 } 339 296 340 /** Stop using a file structure. 297 341 * … … 300 344 void vfs_file_put(vfs_file_t *file) 301 345 { 302 fibril_mutex_lock(&VFS_DATA->lock); 303 vfs_file_delref(file); 304 fibril_mutex_unlock(&VFS_DATA->lock); 346 _vfs_file_put(VFS_DATA, file); 347 } 348 349 void vfs_pass_handle(task_id_t donor_id, task_id_t acceptor_id, int donor_fd) 350 { 351 vfs_client_data_t *donor_data = NULL; 352 vfs_client_data_t *acceptor_data = NULL; 353 vfs_file_t *donor_file = NULL; 354 vfs_file_t *acceptor_file = NULL; 355 vfs_boxed_handle_t *bh; 356 int acceptor_fd; 357 358 acceptor_data = async_get_client_data_by_id(acceptor_id); 359 if (!acceptor_data) 360 return; 361 362 bh = malloc(sizeof(vfs_boxed_handle_t)); 363 assert(bh); 364 365 link_initialize(&bh->link); 366 bh->handle = -1; 367 368 donor_data = async_get_client_data_by_id(donor_id); 369 if (!donor_data) 370 goto out; 371 372 donor_file = _vfs_file_get(donor_data, donor_fd); 373 if (!donor_file) 374 goto out; 375 376 acceptor_fd = _vfs_fd_alloc(acceptor_data, false); 377 if (acceptor_fd < 0) 378 goto out; 379 380 bh->handle = acceptor_fd; 381 382 /* 383 * Add a new reference to the underlying VFS node. 384 */ 385 vfs_node_addref(donor_file->node); 386 (void) vfs_open_node_remote(donor_file->node); 387 388 acceptor_file = _vfs_file_get(acceptor_data, acceptor_fd); 389 assert(acceptor_file); 390 391 /* 392 * Inherit attributes from the donor. 393 */ 394 acceptor_file->node = donor_file->node; 395 acceptor_file->append = donor_file->append; 396 acceptor_file->pos = donor_file->pos; 397 398 out: 399 fibril_mutex_lock(&acceptor_data->lock); 400 list_append(&bh->link, &acceptor_data->passed_handles); 401 fibril_condvar_broadcast(&acceptor_data->cv); 402 fibril_mutex_unlock(&acceptor_data->lock); 403 404 if (donor_data) 405 async_put_client_data_by_id(donor_id); 406 if (acceptor_data) 407 async_put_client_data_by_id(acceptor_id); 408 if (donor_file) 409 _vfs_file_put(donor_data, donor_file); 410 if (acceptor_file) 411 _vfs_file_put(acceptor_data, acceptor_file); 412 413 } 414 415 int vfs_wait_handle_internal(void) 416 { 417 vfs_client_data_t *vfs_data = VFS_DATA; 418 int fd; 419 420 fibril_mutex_lock(&vfs_data->lock); 421 while (list_empty(&vfs_data->passed_handles)) 422 fibril_condvar_wait(&vfs_data->cv, &vfs_data->lock); 423 link_t *lnk = list_first(&vfs_data->passed_handles); 424 list_remove(lnk); 425 fibril_mutex_unlock(&vfs_data->lock); 426 427 vfs_boxed_handle_t *bh = list_get_instance(lnk, vfs_boxed_handle_t, link); 428 fd = bh->handle; 429 free(bh); 430 431 return fd; 305 432 } 306 433
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