Changes in uspace/srv/vfs/vfs_ops.c [6a4e972:ed903174] in mainline
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uspace/srv/vfs/vfs_ops.c
r6a4e972 red903174 38 38 #include "vfs.h" 39 39 #include <ipc/ipc.h> 40 #include <macros.h> 41 #include <limits.h> 40 42 #include <async.h> 41 43 #include <errno.h> … … 53 55 54 56 /* Forward declarations of static functions. */ 55 static int vfs_truncate_internal(fs_handle_t, dev_handle_t, fs_index_t, size_t);57 static int vfs_truncate_internal(fs_handle_t, dev_handle_t, fs_index_t, aoff64_t); 56 58 57 59 /** … … 266 268 267 269 /* We want the client to send us the mount point. */ 268 ipc_callid_t callid; 269 size_t size; 270 if (!async_data_write_receive(&callid, &size)) { 271 ipc_answer_0(callid, EINVAL); 272 ipc_answer_0(rid, EINVAL); 273 return; 274 } 275 276 /* Check whether size is reasonable wrt. the mount point. */ 277 if ((size < 1) || (size > MAX_PATH_LEN)) { 278 ipc_answer_0(callid, EINVAL); 279 ipc_answer_0(rid, EINVAL); 280 return; 281 } 282 283 /* Allocate buffer for the mount point data being received. */ 284 char *mp = malloc(size + 1); 285 if (!mp) { 286 ipc_answer_0(callid, ENOMEM); 287 ipc_answer_0(rid, ENOMEM); 288 return; 289 } 290 291 /* Deliver the mount point. */ 292 ipcarg_t retval = async_data_write_finalize(callid, mp, size); 293 if (retval != EOK) { 294 ipc_answer_0(rid, retval); 270 char *mp; 271 int rc = async_data_write_accept((void **) &mp, true, 0, MAX_PATH_LEN, 272 0, NULL); 273 if (rc != EOK) { 274 ipc_answer_0(rid, rc); 275 return; 276 } 277 278 /* Now we expect to receive the mount options. */ 279 char *opts; 280 rc = async_data_write_accept((void **) &opts, true, 0, MAX_MNTOPTS_LEN, 281 0, NULL); 282 if (rc != EOK) { 295 283 free(mp); 296 return; 297 } 298 mp[size] = '\0'; 299 300 /* Now we expect to receive the mount options. */ 301 if (!async_data_write_receive(&callid, &size)) { 302 ipc_answer_0(callid, EINVAL); 303 ipc_answer_0(rid, EINVAL); 304 free(mp); 305 return; 306 } 307 308 /* Check the offered options size. */ 309 if (size > MAX_MNTOPTS_LEN) { 310 ipc_answer_0(callid, EINVAL); 311 ipc_answer_0(rid, EINVAL); 312 free(mp); 313 return; 314 } 315 316 /* Allocate buffer for the mount options. */ 317 char *opts = (char *) malloc(size + 1); 318 if (!opts) { 319 ipc_answer_0(callid, ENOMEM); 320 ipc_answer_0(rid, ENOMEM); 321 free(mp); 322 return; 323 } 324 325 /* Deliver the mount options. */ 326 retval = async_data_write_finalize(callid, opts, size); 327 if (retval != EOK) { 328 ipc_answer_0(rid, retval); 284 ipc_answer_0(rid, rc); 285 return; 286 } 287 288 /* 289 * Now, we expect the client to send us data with the name of the file 290 * system. 291 */ 292 char *fs_name; 293 rc = async_data_write_accept((void **) &fs_name, true, 0, FS_NAME_MAXLEN, 294 0, NULL); 295 if (rc != EOK) { 329 296 free(mp); 330 297 free(opts); 331 return; 332 } 333 opts[size] = '\0'; 334 335 /* 336 * Now, we expect the client to send us data with the name of the file 337 * system. 338 */ 339 if (!async_data_write_receive(&callid, &size)) { 340 ipc_answer_0(callid, EINVAL); 341 ipc_answer_0(rid, EINVAL); 342 free(mp); 343 free(opts); 344 return; 345 } 346 347 /* 348 * Don't receive more than is necessary for storing a full file system 349 * name. 350 */ 351 if ((size < 1) || (size > FS_NAME_MAXLEN)) { 352 ipc_answer_0(callid, EINVAL); 353 ipc_answer_0(rid, EINVAL); 354 free(mp); 355 free(opts); 356 return; 357 } 358 359 /* 360 * Allocate buffer for file system name. 361 */ 362 char *fs_name = (char *) malloc(size + 1); 363 if (fs_name == NULL) { 364 ipc_answer_0(callid, ENOMEM); 365 ipc_answer_0(rid, ENOMEM); 366 free(mp); 367 free(opts); 368 return; 369 } 370 371 /* Deliver the file system name. */ 372 retval = async_data_write_finalize(callid, fs_name, size); 373 if (retval != EOK) { 374 ipc_answer_0(rid, retval); 375 free(mp); 376 free(opts); 377 free(fs_name); 378 return; 379 } 380 fs_name[size] = '\0'; 381 298 ipc_answer_0(rid, rc); 299 return; 300 } 301 382 302 /* 383 303 * Wait for IPC_M_PING so that we can return an error if we don't know … … 385 305 */ 386 306 ipc_call_t data; 387 callid = async_get_call(&data);307 ipc_callid_t callid = async_get_call(&data); 388 308 if (IPC_GET_METHOD(data) != IPC_M_PING) { 389 309 ipc_answer_0(callid, ENOTSUP); … … 435 355 vfs_lookup_res_t mp_res; 436 356 vfs_lookup_res_t mr_res; 437 vfs_node_t *mp_node;438 357 vfs_node_t *mr_node; 439 358 int phone; … … 442 361 * Receive the mount point path. 443 362 */ 444 rc = async_data_string_receive(&mp, MAX_PATH_LEN); 363 rc = async_data_write_accept((void **) &mp, true, 0, MAX_PATH_LEN, 364 0, NULL); 445 365 if (rc != EOK) 446 366 ipc_answer_0(rid, rc); … … 584 504 int oflag = IPC_GET_ARG2(*request); 585 505 int mode = IPC_GET_ARG3(*request); 586 size_t len;587 506 588 507 /* Ignore mode for now. */ … … 606 525 lflag |= L_EXCLUSIVE; 607 526 608 ipc_callid_t callid; 609 if (!async_data_write_receive(&callid, &len)) { 610 ipc_answer_0(callid, EINVAL); 611 ipc_answer_0(rid, EINVAL); 612 return; 613 } 614 615 char *path = malloc(len + 1); 616 if (!path) { 617 ipc_answer_0(callid, ENOMEM); 618 ipc_answer_0(rid, ENOMEM); 619 return; 620 } 621 622 int rc; 623 if ((rc = async_data_write_finalize(callid, path, len))) { 624 ipc_answer_0(rid, rc); 625 free(path); 626 return; 627 } 628 path[len] = '\0'; 527 char *path; 528 int rc = async_data_write_accept((void **) &path, true, 0, 0, 0, NULL); 529 if (rc != EOK) { 530 ipc_answer_0(rid, rc); 531 return; 532 } 629 533 630 534 /* … … 817 721 } 818 722 819 staticint vfs_close_internal(vfs_file_t *file)723 int vfs_close_internal(vfs_file_t *file) 820 724 { 821 725 /* … … 894 798 895 799 /* 896 * Now we need to receive a call with client's897 * IPC_M_DATA_READ/IPC_M_DATA_WRITE request.898 */899 ipc_callid_t callid;900 int res;901 if (read)902 res = async_data_read_receive(&callid, NULL);903 else904 res = async_data_write_receive(&callid, NULL);905 if (!res) {906 ipc_answer_0(callid, EINVAL);907 ipc_answer_0(rid, EINVAL);908 return;909 }910 911 /*912 800 * Lock the open file structure so that no other thread can manipulate 913 801 * the same open file at a time. … … 933 821 } 934 822 935 int fs_phone = vfs_grab_phone(file->node->fs_handle); 936 937 /* Make a VFS_READ/VFS_WRITE request at the destination FS server. */ 938 aid_t msg; 939 ipc_call_t answer; 940 if (!read && file->append) 941 file->pos = file->node->size; 942 msg = async_send_3(fs_phone, read ? VFS_OUT_READ : VFS_OUT_WRITE, 943 file->node->dev_handle, file->node->index, file->pos, &answer); 944 945 /* 946 * Forward the IPC_M_DATA_READ/IPC_M_DATA_WRITE request to the 823 int fs_phone = vfs_grab_phone(file->node->fs_handle); 824 825 /* 826 * Make a VFS_READ/VFS_WRITE request at the destination FS server 827 * and forward the IPC_M_DATA_READ/IPC_M_DATA_WRITE request to the 947 828 * destination FS server. The call will be routed as if sent by 948 829 * ourselves. Note that call arguments are immutable in this case so we 949 830 * don't have to bother. 950 831 */ 951 ipc_forward_fast(callid, fs_phone, 0, 0, 0, IPC_FF_ROUTE_FROM_ME);952 953 /* Wait for reply from the FS server. */954 832 ipcarg_t rc; 955 async_wait_for(msg, &rc); 833 ipc_call_t answer; 834 if (read) { 835 if (file->append) 836 file->pos = file->node->size; 837 838 rc = async_data_read_forward_3_1(fs_phone, VFS_OUT_READ, 839 file->node->dev_handle, file->node->index, file->pos, 840 &answer); 841 } else { 842 rc = async_data_write_forward_3_1(fs_phone, VFS_OUT_WRITE, 843 file->node->dev_handle, file->node->index, file->pos, 844 &answer); 845 } 956 846 957 847 vfs_release_phone(fs_phone); 958 848 959 849 size_t bytes = IPC_GET_ARG1(answer); 960 850 961 851 if (file->node->type == VFS_NODE_DIRECTORY) 962 852 fibril_rwlock_read_unlock(&namespace_rwlock); … … 997 887 { 998 888 int fd = (int) IPC_GET_ARG1(*request); 999 off _t off = (off_t) IPC_GET_ARG2(*request);1000 int whence = (int) IPC_GET_ARG3(*request);1001 1002 889 off64_t off = 890 (off64_t) MERGE_LOUP32(IPC_GET_ARG2(*request), IPC_GET_ARG3(*request)); 891 int whence = (int) IPC_GET_ARG4(*request); 892 1003 893 /* Lookup the file structure corresponding to the file descriptor. */ 1004 894 vfs_file_t *file = vfs_file_get(fd); … … 1007 897 return; 1008 898 } 1009 1010 off_t newpos; 899 1011 900 fibril_mutex_lock(&file->lock); 1012 if (whence == SEEK_SET) { 1013 file->pos = off; 1014 fibril_mutex_unlock(&file->lock); 1015 ipc_answer_1(rid, EOK, off); 1016 return; 1017 } 1018 if (whence == SEEK_CUR) { 1019 if (file->pos + off < file->pos) { 901 902 off64_t newoff; 903 switch (whence) { 904 case SEEK_SET: 905 if (off >= 0) { 906 file->pos = (aoff64_t) off; 907 fibril_mutex_unlock(&file->lock); 908 ipc_answer_1(rid, EOK, off); 909 return; 910 } 911 break; 912 case SEEK_CUR: 913 if ((off >= 0) && (file->pos + off < file->pos)) { 914 fibril_mutex_unlock(&file->lock); 915 ipc_answer_0(rid, EOVERFLOW); 916 return; 917 } 918 919 if ((off < 0) && (file->pos < (aoff64_t) -off)) { 920 fibril_mutex_unlock(&file->lock); 921 ipc_answer_0(rid, EOVERFLOW); 922 return; 923 } 924 925 file->pos += off; 926 newoff = (file->pos > OFF64_MAX) ? OFF64_MAX : file->pos; 927 1020 928 fibril_mutex_unlock(&file->lock); 1021 ipc_answer_ 0(rid, EOVERFLOW);929 ipc_answer_2(rid, EOK, LOWER32(newoff), UPPER32(newoff)); 1022 930 return; 1023 } 1024 file->pos += off; 1025 newpos = file->pos; 1026 fibril_mutex_unlock(&file->lock); 1027 ipc_answer_1(rid, EOK, newpos); 1028 return; 1029 } 1030 if (whence == SEEK_END) { 1031 fibril_rwlock_read_lock(&file->node->contents_rwlock); 1032 size_t size = file->node->size; 1033 fibril_rwlock_read_unlock(&file->node->contents_rwlock); 1034 if (size + off < size) { 931 case SEEK_END: 932 fibril_rwlock_read_lock(&file->node->contents_rwlock); 933 aoff64_t size = file->node->size; 934 935 if ((off >= 0) && (size + off < size)) { 936 fibril_rwlock_read_unlock(&file->node->contents_rwlock); 937 fibril_mutex_unlock(&file->lock); 938 ipc_answer_0(rid, EOVERFLOW); 939 return; 940 } 941 942 if ((off < 0) && (size < (aoff64_t) -off)) { 943 fibril_rwlock_read_unlock(&file->node->contents_rwlock); 944 fibril_mutex_unlock(&file->lock); 945 ipc_answer_0(rid, EOVERFLOW); 946 return; 947 } 948 949 file->pos = size + off; 950 newoff = (file->pos > OFF64_MAX) ? OFF64_MAX : file->pos; 951 952 fibril_rwlock_read_unlock(&file->node->contents_rwlock); 1035 953 fibril_mutex_unlock(&file->lock); 1036 ipc_answer_ 0(rid, EOVERFLOW);954 ipc_answer_2(rid, EOK, LOWER32(newoff), UPPER32(newoff)); 1037 955 return; 1038 } 1039 newpos = size + off; 1040 file->pos = newpos; 1041 fibril_mutex_unlock(&file->lock); 1042 ipc_answer_1(rid, EOK, newpos); 1043 return; 1044 } 956 } 957 1045 958 fibril_mutex_unlock(&file->lock); 1046 959 ipc_answer_0(rid, EINVAL); 1047 960 } 1048 961 1049 int 1050 vfs_truncate_internal(fs_handle_t fs_handle, dev_handle_t dev_handle, 1051 fs_index_t index, size_t size) 962 int vfs_truncate_internal(fs_handle_t fs_handle, dev_handle_t dev_handle, 963 fs_index_t index, aoff64_t size) 1052 964 { 1053 965 ipcarg_t rc; … … 1055 967 1056 968 fs_phone = vfs_grab_phone(fs_handle); 1057 rc = async_req_ 3_0(fs_phone, VFS_OUT_TRUNCATE, (ipcarg_t)dev_handle,1058 (ipcarg_t) index, (ipcarg_t)size);969 rc = async_req_4_0(fs_phone, VFS_OUT_TRUNCATE, (ipcarg_t) dev_handle, 970 (ipcarg_t) index, LOWER32(size), UPPER32(size)); 1059 971 vfs_release_phone(fs_phone); 1060 972 return (int)rc; … … 1064 976 { 1065 977 int fd = IPC_GET_ARG1(*request); 1066 size_t size = IPC_GET_ARG2(*request); 978 aoff64_t size = 979 (aoff64_t) MERGE_LOUP32(IPC_GET_ARG2(*request), IPC_GET_ARG3(*request)); 1067 980 int rc; 1068 981 … … 1120 1033 void vfs_stat(ipc_callid_t rid, ipc_call_t *request) 1121 1034 { 1122 size_t len; 1035 char *path; 1036 int rc = async_data_write_accept((void **) &path, true, 0, 0, 0, NULL); 1037 if (rc != EOK) { 1038 ipc_answer_0(rid, rc); 1039 return; 1040 } 1041 1123 1042 ipc_callid_t callid; 1124 1125 if (!async_data_write_receive(&callid, &len)) {1126 ipc_answer_0(callid, EINVAL);1127 ipc_answer_0(rid, EINVAL);1128 return;1129 }1130 char *path = malloc(len + 1);1131 if (!path) {1132 ipc_answer_0(callid, ENOMEM);1133 ipc_answer_0(rid, ENOMEM);1134 return;1135 }1136 int rc;1137 if ((rc = async_data_write_finalize(callid, path, len))) {1138 ipc_answer_0(rid, rc);1139 free(path);1140 return;1141 }1142 path[len] = '\0';1143 1144 1043 if (!async_data_read_receive(&callid, NULL)) { 1145 1044 free(path); … … 1187 1086 { 1188 1087 int mode = IPC_GET_ARG1(*request); 1189 1190 size_t len; 1191 ipc_callid_t callid; 1192 1193 if (!async_data_write_receive(&callid, &len)) { 1194 ipc_answer_0(callid, EINVAL); 1195 ipc_answer_0(rid, EINVAL); 1196 return; 1197 } 1198 char *path = malloc(len + 1); 1199 if (!path) { 1200 ipc_answer_0(callid, ENOMEM); 1201 ipc_answer_0(rid, ENOMEM); 1202 return; 1203 } 1204 int rc; 1205 if ((rc = async_data_write_finalize(callid, path, len))) { 1206 ipc_answer_0(rid, rc); 1207 free(path); 1208 return; 1209 } 1210 path[len] = '\0'; 1211 1088 1089 char *path; 1090 int rc = async_data_write_accept((void **) &path, true, 0, 0, 0, NULL); 1091 if (rc != EOK) { 1092 ipc_answer_0(rid, rc); 1093 return; 1094 } 1095 1212 1096 /* Ignore mode for now. */ 1213 1097 (void) mode; … … 1224 1108 { 1225 1109 int lflag = IPC_GET_ARG1(*request); 1226 1227 size_t len; 1228 ipc_callid_t callid; 1229 1230 if (!async_data_write_receive(&callid, &len)) { 1231 ipc_answer_0(callid, EINVAL); 1232 ipc_answer_0(rid, EINVAL); 1233 return; 1234 } 1235 char *path = malloc(len + 1); 1236 if (!path) { 1237 ipc_answer_0(callid, ENOMEM); 1238 ipc_answer_0(rid, ENOMEM); 1239 return; 1240 } 1241 int rc; 1242 if ((rc = async_data_write_finalize(callid, path, len))) { 1243 ipc_answer_0(rid, rc); 1244 free(path); 1245 return; 1246 } 1247 path[len] = '\0'; 1110 1111 char *path; 1112 int rc = async_data_write_accept((void **) &path, true, 0, 0, 0, NULL); 1113 if (rc != EOK) { 1114 ipc_answer_0(rid, rc); 1115 return; 1116 } 1248 1117 1249 1118 fibril_rwlock_write_lock(&namespace_rwlock); … … 1274 1143 void vfs_rename(ipc_callid_t rid, ipc_call_t *request) 1275 1144 { 1276 size_t olen, nlen;1277 ipc_callid_t callid;1278 int rc;1279 1280 1145 /* Retrieve the old path. */ 1281 if (!async_data_write_receive(&callid, &olen)) { 1282 ipc_answer_0(callid, EINVAL); 1283 ipc_answer_0(rid, EINVAL); 1284 return; 1285 } 1286 char *old = malloc(olen + 1); 1287 if (!old) { 1288 ipc_answer_0(callid, ENOMEM); 1289 ipc_answer_0(rid, ENOMEM); 1290 return; 1291 } 1292 if ((rc = async_data_write_finalize(callid, old, olen))) { 1293 ipc_answer_0(rid, rc); 1146 char *old; 1147 int rc = async_data_write_accept((void **) &old, true, 0, 0, 0, NULL); 1148 if (rc != EOK) { 1149 ipc_answer_0(rid, rc); 1150 return; 1151 } 1152 1153 /* Retrieve the new path. */ 1154 char *new; 1155 rc = async_data_write_accept((void **) &new, true, 0, 0, 0, NULL); 1156 if (rc != EOK) { 1294 1157 free(old); 1295 return; 1296 } 1297 old[olen] = '\0'; 1298 1299 /* Retrieve the new path. */ 1300 if (!async_data_write_receive(&callid, &nlen)) { 1301 ipc_answer_0(callid, EINVAL); 1302 ipc_answer_0(rid, EINVAL); 1303 free(old); 1304 return; 1305 } 1306 char *new = malloc(nlen + 1); 1307 if (!new) { 1308 ipc_answer_0(callid, ENOMEM); 1309 ipc_answer_0(rid, ENOMEM); 1310 free(old); 1311 return; 1312 } 1313 if ((rc = async_data_write_finalize(callid, new, nlen))) { 1314 ipc_answer_0(rid, rc); 1315 free(old); 1316 free(new); 1317 return; 1318 } 1319 new[nlen] = '\0'; 1320 1158 ipc_answer_0(rid, rc); 1159 return; 1160 } 1161 1162 size_t olen; 1163 size_t nlen; 1321 1164 char *oldc = canonify(old, &olen); 1322 1165 char *newc = canonify(new, &nlen); 1323 if (!oldc || !newc) { 1166 1167 if ((!oldc) || (!newc)) { 1324 1168 ipc_answer_0(rid, EINVAL); 1325 1169 free(old); … … 1327 1171 return; 1328 1172 } 1173 1329 1174 oldc[olen] = '\0'; 1330 1175 newc[nlen] = '\0'; 1176 1331 1177 if ((!str_lcmp(newc, oldc, str_length(oldc))) && 1332 1178 ((newc[str_length(oldc)] == '/') || … … 1349 1195 vfs_lookup_res_t new_par_lr; 1350 1196 fibril_rwlock_write_lock(&namespace_rwlock); 1197 1351 1198 /* Lookup the node belonging to the old file name. */ 1352 1199 rc = vfs_lookup_internal(oldc, L_NONE, &old_lr, NULL); … … 1358 1205 return; 1359 1206 } 1207 1360 1208 vfs_node_t *old_node = vfs_node_get(&old_lr); 1361 1209 if (!old_node) { … … 1366 1214 return; 1367 1215 } 1216 1368 1217 /* Determine the path to the parent of the node with the new name. */ 1369 1218 char *parentc = str_dup(newc); … … 1375 1224 return; 1376 1225 } 1226 1377 1227 char *lastsl = str_rchr(parentc + 1, '/'); 1378 1228 if (lastsl) … … 1380 1230 else 1381 1231 parentc[1] = '\0'; 1232 1382 1233 /* Lookup parent of the new file name. */ 1383 1234 rc = vfs_lookup_internal(parentc, L_NONE, &new_par_lr, NULL); … … 1390 1241 return; 1391 1242 } 1243 1392 1244 /* Check whether linking to the same file system instance. */ 1393 1245 if ((old_node->fs_handle != new_par_lr.triplet.fs_handle) || … … 1399 1251 return; 1400 1252 } 1253 1401 1254 /* Destroy the old link for the new name. */ 1402 1255 vfs_node_t *new_node = NULL; 1403 1256 rc = vfs_lookup_internal(newc, L_UNLINK, &new_lr, NULL); 1257 1404 1258 switch (rc) { 1405 1259 case ENOENT: … … 1426 1280 return; 1427 1281 } 1282 1428 1283 /* Create the new link for the new name. */ 1429 1284 rc = vfs_lookup_internal(newc, L_LINK, NULL, NULL, old_node->index); … … 1437 1292 return; 1438 1293 } 1294 1439 1295 fibril_mutex_lock(&nodes_mutex); 1440 1296 old_node->lnkcnt++; 1441 1297 fibril_mutex_unlock(&nodes_mutex); 1298 1442 1299 /* Destroy the link for the old name. */ 1443 1300 rc = vfs_lookup_internal(oldc, L_UNLINK, NULL, NULL); … … 1452 1309 return; 1453 1310 } 1311 1454 1312 fibril_mutex_lock(&nodes_mutex); 1455 1313 old_node->lnkcnt--; … … 1457 1315 fibril_rwlock_write_unlock(&namespace_rwlock); 1458 1316 vfs_node_put(old_node); 1317 1459 1318 if (new_node) 1460 1319 vfs_node_put(new_node); 1320 1461 1321 free(old); 1462 1322 free(new);
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