Changes in uspace/srv/vfs/vfs_ops.c [ffa2c8ef:27b76ca] in mainline
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uspace/srv/vfs/vfs_ops.c
rffa2c8ef r27b76ca 76 76 vfs_node_t *mr_node; 77 77 fs_index_t rindex; 78 size_t rsize;78 aoff64_t rsize; 79 79 unsigned rlnkcnt; 80 async_exch_t *exch; 80 81 sysarg_t rc; 81 int phone;82 82 aid_t msg; 83 83 ipc_call_t answer; … … 123 123 124 124 /* Tell the mountee that it is being mounted. */ 125 phone = vfs_grab_phone(fs_handle);126 msg = async_send_1( phone, VFS_OUT_MOUNTED,125 exch = vfs_exchange_grab(fs_handle); 126 msg = async_send_1(exch, VFS_OUT_MOUNTED, 127 127 (sysarg_t) devmap_handle, &answer); 128 /* send the mount options */129 rc = async_data_write_start( phone, (void *)opts,128 /* Send the mount options */ 129 rc = async_data_write_start(exch, (void *)opts, 130 130 str_size(opts)); 131 vfs_exchange_release(exch); 132 131 133 if (rc != EOK) { 132 134 async_wait_for(msg, NULL); 133 vfs_release_phone(fs_handle, phone);134 135 fibril_rwlock_write_unlock(&namespace_rwlock); 135 136 async_answer_0(rid, rc); … … 137 138 } 138 139 async_wait_for(msg, &rc); 139 vfs_release_phone(fs_handle, phone);140 140 141 141 if (rc != EOK) { … … 146 146 147 147 rindex = (fs_index_t) IPC_GET_ARG1(answer); 148 rsize = ( size_t) IPC_GET_ARG2(answer);149 rlnkcnt = (unsigned) IPC_GET_ARG 3(answer);148 rsize = (aoff64_t) MERGE_LOUP32(IPC_GET_ARG2(answer), IPC_GET_ARG3(answer)); 149 rlnkcnt = (unsigned) IPC_GET_ARG4(answer); 150 150 151 151 mr_res.triplet.fs_handle = fs_handle; … … 182 182 */ 183 183 184 int mountee_phone = vfs_grab_phone(fs_handle);185 assert(mountee_ phone >= 0);186 187 phone = vfs_grab_phone(mp_res.triplet.fs_handle);188 msg = async_send_4( phone, VFS_OUT_MOUNT,184 async_exch_t *mountee_exch = vfs_exchange_grab(fs_handle); 185 assert(mountee_exch); 186 187 exch = vfs_exchange_grab(mp_res.triplet.fs_handle); 188 msg = async_send_4(exch, VFS_OUT_MOUNT, 189 189 (sysarg_t) mp_res.triplet.devmap_handle, 190 190 (sysarg_t) mp_res.triplet.index, … … 192 192 (sysarg_t) devmap_handle, &answer); 193 193 194 /* send connection */ 195 rc = async_req_1_0(phone, IPC_M_CONNECTION_CLONE, mountee_phone); 196 if (rc != EOK) { 194 /* Send connection */ 195 rc = async_exchange_clone(exch, mountee_exch); 196 vfs_exchange_release(mountee_exch); 197 198 if (rc != EOK) { 199 vfs_exchange_release(exch); 197 200 async_wait_for(msg, NULL); 198 vfs_release_phone(fs_handle, mountee_phone); 199 vfs_release_phone(mp_res.triplet.fs_handle, phone); 201 200 202 /* Mount failed, drop reference to mp_node. */ 201 203 if (mp_node) 202 204 vfs_node_put(mp_node); 203 async_answer_0(rid, rc); 204 fibril_rwlock_write_unlock(&namespace_rwlock); 205 return; 206 } 207 208 vfs_release_phone(fs_handle, mountee_phone); 205 206 async_answer_0(rid, rc); 207 fibril_rwlock_write_unlock(&namespace_rwlock); 208 return; 209 } 209 210 210 211 /* send the mount options */ 211 rc = async_data_write_start(phone, (void *)opts, str_size(opts)); 212 if (rc != EOK) { 212 rc = async_data_write_start(exch, (void *) opts, str_size(opts)); 213 if (rc != EOK) { 214 vfs_exchange_release(exch); 213 215 async_wait_for(msg, NULL); 214 vfs_release_phone(mp_res.triplet.fs_handle, phone);216 215 217 /* Mount failed, drop reference to mp_node. */ 216 218 if (mp_node) 217 219 vfs_node_put(mp_node); 218 fibril_rwlock_write_unlock(&namespace_rwlock); 219 async_answer_0(rid, rc); 220 return; 221 } 220 221 fibril_rwlock_write_unlock(&namespace_rwlock); 222 async_answer_0(rid, rc); 223 return; 224 } 225 226 vfs_exchange_release(exch); 222 227 async_wait_for(msg, &rc); 223 vfs_release_phone(mp_res.triplet.fs_handle, phone);224 228 225 229 if (rc == EOK) { 226 230 rindex = (fs_index_t) IPC_GET_ARG1(answer); 227 rsize = (size_t) IPC_GET_ARG2(answer); 228 rlnkcnt = (unsigned) IPC_GET_ARG3(answer); 229 231 rsize = (aoff64_t) MERGE_LOUP32(IPC_GET_ARG2(answer), 232 IPC_GET_ARG3(answer)); 233 rlnkcnt = (unsigned) IPC_GET_ARG4(answer); 234 230 235 mr_res.triplet.fs_handle = fs_handle; 231 236 mr_res.triplet.devmap_handle = devmap_handle; … … 234 239 mr_res.lnkcnt = rlnkcnt; 235 240 mr_res.type = VFS_NODE_DIRECTORY; 236 241 237 242 /* Add reference to the mounted root. */ 238 243 mr_node = vfs_node_get(&mr_res); … … 243 248 vfs_node_put(mp_node); 244 249 } 245 250 246 251 async_answer_0(rid, rc); 247 252 fibril_rwlock_write_unlock(&namespace_rwlock); … … 303 308 304 309 /* 305 * Wait for IPC_M_PING so that we can return an error if we don't know310 * Wait for VFS_IN_PING so that we can return an error if we don't know 306 311 * fs_name. 307 312 */ 308 313 ipc_call_t data; 309 314 ipc_callid_t callid = async_get_call(&data); 310 if (IPC_GET_IMETHOD(data) != IPC_M_PING) {315 if (IPC_GET_IMETHOD(data) != VFS_IN_PING) { 311 316 async_answer_0(callid, ENOTSUP); 312 317 async_answer_0(rid, ENOTSUP); … … 321 326 * This will also give us its file system handle. 322 327 */ 323 fibril_mutex_lock(&fs_ head_lock);328 fibril_mutex_lock(&fs_list_lock); 324 329 fs_handle_t fs_handle; 325 330 recheck: … … 327 332 if (!fs_handle) { 328 333 if (flags & IPC_FLAG_BLOCKING) { 329 fibril_condvar_wait(&fs_ head_cv, &fs_head_lock);334 fibril_condvar_wait(&fs_list_cv, &fs_list_lock); 330 335 goto recheck; 331 336 } 332 337 333 fibril_mutex_unlock(&fs_ head_lock);338 fibril_mutex_unlock(&fs_list_lock); 334 339 async_answer_0(callid, ENOENT); 335 340 async_answer_0(rid, ENOENT); … … 339 344 return; 340 345 } 341 fibril_mutex_unlock(&fs_ head_lock);346 fibril_mutex_unlock(&fs_list_lock); 342 347 343 348 /* Acknowledge that we know fs_name. */ … … 358 363 vfs_lookup_res_t mr_res; 359 364 vfs_node_t *mr_node; 360 int phone;361 365 async_exch_t *exch; 366 362 367 /* 363 368 * Receive the mount point path. … … 367 372 if (rc != EOK) 368 373 async_answer_0(rid, rc); 369 374 370 375 /* 371 376 * Taking the namespace lock will do two things for us. First, it will … … 395 400 return; 396 401 } 397 402 398 403 /* 399 404 * Count the total number of references for the mounted file system. We … … 411 416 return; 412 417 } 413 418 414 419 if (str_cmp(mp, "/") == 0) { 415 420 416 421 /* 417 422 * Unmounting the root file system. … … 420 425 * VFS_OUT_UNMOUNTED directly to the mounted file system. 421 426 */ 422 427 423 428 free(mp); 424 phone = vfs_grab_phone(mr_node->fs_handle); 425 rc = async_req_1_0(phone, VFS_OUT_UNMOUNTED, 429 430 exch = vfs_exchange_grab(mr_node->fs_handle); 431 rc = async_req_1_0(exch, VFS_OUT_UNMOUNTED, 426 432 mr_node->devmap_handle); 427 vfs_release_phone(mr_node->fs_handle, phone); 433 vfs_exchange_release(exch); 434 428 435 if (rc != EOK) { 429 436 fibril_rwlock_write_unlock(&namespace_rwlock); … … 432 439 return; 433 440 } 441 434 442 rootfs.fs_handle = 0; 435 443 rootfs.devmap_handle = 0; 436 444 } else { 437 445 438 446 /* 439 447 * Unmounting a non-root file system. … … 442 450 * file system, so we delegate the operation to it. 443 451 */ 444 452 445 453 rc = vfs_lookup_internal(mp, L_MP, &mp_res, NULL); 446 454 free(mp); … … 451 459 return; 452 460 } 461 453 462 vfs_node_t *mp_node = vfs_node_get(&mp_res); 454 463 if (!mp_node) { … … 458 467 return; 459 468 } 460 461 phone = vfs_grab_phone(mp_node->fs_handle);462 rc = async_req_2_0( phone, VFS_OUT_UNMOUNT,469 470 exch = vfs_exchange_grab(mp_node->fs_handle); 471 rc = async_req_2_0(exch, VFS_OUT_UNMOUNT, 463 472 mp_node->devmap_handle, mp_node->index); 464 vfs_release_phone(mp_node->fs_handle, phone); 473 vfs_exchange_release(exch); 474 465 475 if (rc != EOK) { 466 476 fibril_rwlock_write_unlock(&namespace_rwlock); … … 470 480 return; 471 481 } 472 482 473 483 /* Drop the reference we got above. */ 474 484 vfs_node_put(mp_node); … … 476 486 vfs_node_put(mp_node); 477 487 } 478 479 488 480 489 /* 481 490 * All went well, the mounted file system was successfully unmounted. … … 483 492 */ 484 493 vfs_node_forget(mr_node); 485 494 486 495 fibril_rwlock_write_unlock(&namespace_rwlock); 487 496 async_answer_0(rid, EOK); … … 609 618 } 610 619 611 void vfs_open_node(ipc_callid_t rid, ipc_call_t *request)612 {613 // FIXME: check for sanity of the supplied fs, dev and index614 615 /*616 * The interface is open_node(fs, dev, index, oflag).617 */618 vfs_lookup_res_t lr;619 620 lr.triplet.fs_handle = IPC_GET_ARG1(*request);621 lr.triplet.devmap_handle = IPC_GET_ARG2(*request);622 lr.triplet.index = IPC_GET_ARG3(*request);623 int oflag = IPC_GET_ARG4(*request);624 625 fibril_rwlock_read_lock(&namespace_rwlock);626 627 int rc = vfs_open_node_internal(&lr);628 if (rc != EOK) {629 fibril_rwlock_read_unlock(&namespace_rwlock);630 async_answer_0(rid, rc);631 return;632 }633 634 vfs_node_t *node = vfs_node_get(&lr);635 fibril_rwlock_read_unlock(&namespace_rwlock);636 637 /* Truncate the file if requested and if necessary. */638 if (oflag & O_TRUNC) {639 fibril_rwlock_write_lock(&node->contents_rwlock);640 if (node->size) {641 rc = vfs_truncate_internal(node->fs_handle,642 node->devmap_handle, node->index, 0);643 if (rc) {644 fibril_rwlock_write_unlock(&node->contents_rwlock);645 vfs_node_put(node);646 async_answer_0(rid, rc);647 return;648 }649 node->size = 0;650 }651 fibril_rwlock_write_unlock(&node->contents_rwlock);652 }653 654 /*655 * Get ourselves a file descriptor and the corresponding vfs_file_t656 * structure.657 */658 int fd = vfs_fd_alloc((oflag & O_DESC) != 0);659 if (fd < 0) {660 vfs_node_put(node);661 async_answer_0(rid, fd);662 return;663 }664 vfs_file_t *file = vfs_file_get(fd);665 file->node = node;666 if (oflag & O_APPEND)667 file->append = true;668 669 /*670 * The following increase in reference count is for the fact that the671 * file is being opened and that a file structure is pointing to it.672 * It is necessary so that the file will not disappear when673 * vfs_node_put() is called. The reference will be dropped by the674 * respective VFS_IN_CLOSE.675 */676 vfs_node_addref(node);677 vfs_node_put(node);678 vfs_file_put(file);679 680 /* Success! Return the new file descriptor to the client. */681 async_answer_1(rid, EOK, fd);682 }683 684 620 void vfs_sync(ipc_callid_t rid, ipc_call_t *request) 685 621 { … … 698 634 */ 699 635 fibril_mutex_lock(&file->lock); 700 int fs_phone = vfs_grab_phone(file->node->fs_handle);636 async_exch_t *fs_exch = vfs_exchange_grab(file->node->fs_handle); 701 637 702 638 /* Make a VFS_OUT_SYMC request at the destination FS server. */ 703 639 aid_t msg; 704 640 ipc_call_t answer; 705 msg = async_send_2(fs_ phone, VFS_OUT_SYNC, file->node->devmap_handle,641 msg = async_send_2(fs_exch, VFS_OUT_SYNC, file->node->devmap_handle, 706 642 file->node->index, &answer); 707 643 644 vfs_exchange_release(fs_exch); 645 708 646 /* Wait for reply from the FS server. */ 709 647 sysarg_t rc; 710 648 async_wait_for(msg, &rc); 711 649 712 vfs_release_phone(file->node->fs_handle, fs_phone);713 650 fibril_mutex_unlock(&file->lock); 714 651 715 652 vfs_file_put(file); 716 653 async_answer_0(rid, rc); 717 654 } 718 655 719 int vfs_close_internal(vfs_file_t *file)720 {721 /*722 * Lock the open file structure so that no other thread can manipulate723 * the same open file at a time.724 */725 fibril_mutex_lock(&file->lock);726 727 if (file->refcnt <= 1) {728 /* Only close the file on the destination FS server729 if there are no more file descriptors (except the730 present one) pointing to this file. */731 732 int fs_phone = vfs_grab_phone(file->node->fs_handle);733 734 /* Make a VFS_OUT_CLOSE request at the destination FS server. */735 aid_t msg;736 ipc_call_t answer;737 msg = async_send_2(fs_phone, VFS_OUT_CLOSE,738 file->node->devmap_handle, file->node->index, &answer);739 740 /* Wait for reply from the FS server. */741 sysarg_t rc;742 async_wait_for(msg, &rc);743 744 vfs_release_phone(file->node->fs_handle, fs_phone);745 fibril_mutex_unlock(&file->lock);746 747 return IPC_GET_ARG1(answer);748 }749 750 fibril_mutex_unlock(&file->lock);751 return EOK;752 }753 754 656 void vfs_close(ipc_callid_t rid, ipc_call_t *request) 755 657 { 756 658 int fd = IPC_GET_ARG1(*request); 757 758 /* Lookup the file structure corresponding to the file descriptor. */ 759 vfs_file_t *file = vfs_file_get(fd); 760 if (!file) { 761 async_answer_0(rid, ENOENT); 762 return; 763 } 764 765 int ret = vfs_close_internal(file); 766 if (ret != EOK) 767 async_answer_0(rid, ret); 768 769 vfs_file_put(file); 770 ret = vfs_fd_free(fd); 659 int ret = vfs_fd_free(fd); 771 660 async_answer_0(rid, ret); 772 661 } … … 774 663 static void vfs_rdwr(ipc_callid_t rid, ipc_call_t *request, bool read) 775 664 { 776 vfs_info_t *vi;777 778 665 /* 779 666 * The following code strongly depends on the fact that the files data … … 785 672 * open files supports parallel access! 786 673 */ 787 674 788 675 int fd = IPC_GET_ARG1(*request); 789 676 … … 800 687 */ 801 688 fibril_mutex_lock(&file->lock); 802 803 v i= fs_handle_to_info(file->node->fs_handle);804 assert( vi);805 689 690 vfs_info_t *fs_info = fs_handle_to_info(file->node->fs_handle); 691 assert(fs_info); 692 806 693 /* 807 694 * Lock the file's node so that no other client can read/write to it at … … 809 696 * write implementation does not modify the file size. 810 697 */ 811 if (read || (vi->concurrent_read_write && vi->write_retains_size)) 698 if ((read) || 699 ((fs_info->concurrent_read_write) && (fs_info->write_retains_size))) 812 700 fibril_rwlock_read_lock(&file->node->contents_rwlock); 813 701 else 814 702 fibril_rwlock_write_lock(&file->node->contents_rwlock); 815 703 816 704 if (file->node->type == VFS_NODE_DIRECTORY) { 817 705 /* … … 823 711 } 824 712 825 int fs_phone = vfs_grab_phone(file->node->fs_handle);713 async_exch_t *fs_exch = vfs_exchange_grab(file->node->fs_handle); 826 714 827 715 /* … … 835 723 ipc_call_t answer; 836 724 if (read) { 837 rc = async_data_read_forward_ 3_1(fs_phone, VFS_OUT_READ,838 file->node->devmap_handle, file->node->index, file->pos,839 &answer);725 rc = async_data_read_forward_4_1(fs_exch, VFS_OUT_READ, 726 file->node->devmap_handle, file->node->index, 727 LOWER32(file->pos), UPPER32(file->pos), &answer); 840 728 } else { 841 729 if (file->append) 842 730 file->pos = file->node->size; 843 731 844 rc = async_data_write_forward_ 3_1(fs_phone, VFS_OUT_WRITE,845 file->node->devmap_handle, file->node->index, file->pos,846 &answer);847 } 848 849 vfs_ release_phone(file->node->fs_handle, fs_phone);732 rc = async_data_write_forward_4_1(fs_exch, VFS_OUT_WRITE, 733 file->node->devmap_handle, file->node->index, 734 LOWER32(file->pos), UPPER32(file->pos), &answer); 735 } 736 737 vfs_exchange_release(fs_exch); 850 738 851 739 size_t bytes = IPC_GET_ARG1(answer); … … 855 743 856 744 /* Unlock the VFS node. */ 857 if (read || (vi->concurrent_read_write && vi->write_retains_size)) 745 if ((read) || 746 ((fs_info->concurrent_read_write) && (fs_info->write_retains_size))) 858 747 fibril_rwlock_read_unlock(&file->node->contents_rwlock); 859 748 else { 860 749 /* Update the cached version of node's size. */ 861 750 if (rc == EOK) 862 file->node->size = IPC_GET_ARG2(answer); 751 file->node->size = MERGE_LOUP32(IPC_GET_ARG2(answer), 752 IPC_GET_ARG3(answer)); 863 753 fibril_rwlock_write_unlock(&file->node->contents_rwlock); 864 754 } … … 975 865 fs_index_t index, aoff64_t size) 976 866 { 977 sysarg_t rc; 978 int fs_phone; 979 980 fs_phone = vfs_grab_phone(fs_handle); 981 rc = async_req_4_0(fs_phone, VFS_OUT_TRUNCATE, (sysarg_t) devmap_handle, 982 (sysarg_t) index, LOWER32(size), UPPER32(size)); 983 vfs_release_phone(fs_handle, fs_phone); 984 return (int)rc; 867 async_exch_t *exch = vfs_exchange_grab(fs_handle); 868 sysarg_t rc = async_req_4_0(exch, VFS_OUT_TRUNCATE, 869 (sysarg_t) devmap_handle, (sysarg_t) index, LOWER32(size), 870 UPPER32(size)); 871 vfs_exchange_release(exch); 872 873 return (int) rc; 985 874 } 986 875 … … 1032 921 fibril_mutex_lock(&file->lock); 1033 922 1034 int fs_phone = vfs_grab_phone(file->node->fs_handle);923 async_exch_t *exch = vfs_exchange_grab(file->node->fs_handle); 1035 924 1036 925 aid_t msg; 1037 msg = async_send_3( fs_phone, VFS_OUT_STAT, file->node->devmap_handle,926 msg = async_send_3(exch, VFS_OUT_STAT, file->node->devmap_handle, 1038 927 file->node->index, true, NULL); 1039 async_forward_fast(callid, fs_phone, 0, 0, 0, IPC_FF_ROUTE_FROM_ME); 928 async_forward_fast(callid, exch, 0, 0, 0, IPC_FF_ROUTE_FROM_ME); 929 930 vfs_exchange_release(exch); 931 1040 932 async_wait_for(msg, &rc); 1041 vfs_release_phone(file->node->fs_handle, fs_phone); 1042 933 1043 934 fibril_mutex_unlock(&file->lock); 1044 935 vfs_file_put(file); … … 1083 974 fibril_rwlock_read_unlock(&namespace_rwlock); 1084 975 1085 int fs_phone = vfs_grab_phone(node->fs_handle); 976 async_exch_t *exch = vfs_exchange_grab(node->fs_handle); 977 1086 978 aid_t msg; 1087 msg = async_send_3( fs_phone, VFS_OUT_STAT, node->devmap_handle,979 msg = async_send_3(exch, VFS_OUT_STAT, node->devmap_handle, 1088 980 node->index, false, NULL); 1089 async_forward_fast(callid, fs_phone, 0, 0, 0, IPC_FF_ROUTE_FROM_ME); 981 async_forward_fast(callid, exch, 0, 0, 0, IPC_FF_ROUTE_FROM_ME); 982 983 vfs_exchange_release(exch); 1090 984 1091 985 sysarg_t rv; 1092 986 async_wait_for(msg, &rv); 1093 vfs_release_phone(node->fs_handle, fs_phone);1094 987 1095 988 async_answer_0(rid, rv); … … 1234 1127 if (!parentc) { 1235 1128 fibril_rwlock_write_unlock(&namespace_rwlock); 1129 vfs_node_put(old_node); 1236 1130 async_answer_0(rid, rc); 1237 1131 free(old); … … 1251 1145 if (rc != EOK) { 1252 1146 fibril_rwlock_write_unlock(&namespace_rwlock); 1147 vfs_node_put(old_node); 1253 1148 async_answer_0(rid, rc); 1254 1149 free(old); … … 1261 1156 (old_node->devmap_handle != new_par_lr.triplet.devmap_handle)) { 1262 1157 fibril_rwlock_write_unlock(&namespace_rwlock); 1158 vfs_node_put(old_node); 1263 1159 async_answer_0(rid, EXDEV); /* different file systems */ 1264 1160 free(old); … … 1279 1175 if (!new_node) { 1280 1176 fibril_rwlock_write_unlock(&namespace_rwlock); 1177 vfs_node_put(old_node); 1281 1178 async_answer_0(rid, ENOMEM); 1282 1179 free(old); … … 1290 1187 default: 1291 1188 fibril_rwlock_write_unlock(&namespace_rwlock); 1189 vfs_node_put(old_node); 1292 1190 async_answer_0(rid, ENOTEMPTY); 1293 1191 free(old); … … 1300 1198 if (rc != EOK) { 1301 1199 fibril_rwlock_write_unlock(&namespace_rwlock); 1200 vfs_node_put(old_node); 1302 1201 if (new_node) 1303 1202 vfs_node_put(new_node); … … 1363 1262 fibril_mutex_lock(&oldfile->lock); 1364 1263 1365 /* Lookup an open file structure possibly corresponding to newfd. */ 1366 vfs_file_t *newfile = vfs_file_get(newfd); 1367 if (newfile) { 1368 /* Close the originally opened file. */ 1369 int ret = vfs_close_internal(newfile); 1370 if (ret != EOK) { 1371 fibril_mutex_unlock(&oldfile->lock); 1372 vfs_file_put(oldfile); 1373 vfs_file_put(newfile); 1374 async_answer_0(rid, ret); 1375 return; 1376 } 1377 1378 ret = vfs_fd_free(newfd); 1379 if (ret != EOK) { 1380 fibril_mutex_unlock(&oldfile->lock); 1381 vfs_file_put(oldfile); 1382 vfs_file_put(newfile); 1383 async_answer_0(rid, ret); 1384 return; 1385 } 1386 vfs_file_put(newfile); 1387 } 1264 /* Make sure newfd is closed. */ 1265 (void) vfs_fd_free(newfd); 1388 1266 1389 1267 /* Assign the old file to newfd. */ … … 1398 1276 } 1399 1277 1278 void vfs_wait_handle(ipc_callid_t rid, ipc_call_t *request) 1279 { 1280 int fd = vfs_wait_handle_internal(); 1281 async_answer_1(rid, EOK, fd); 1282 } 1283 1400 1284 /** 1401 1285 * @}
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