50 |
char *filename; |
char *filename; |
51 |
}; |
}; |
52 |
|
|
|
static int fuse_dirent_helper(fuse_dirh_t handle, const char *name, |
|
|
int type, ino_t ino); |
|
|
static int fuse_dirent_helper_compat(fuse_dirh_t handle, const char *name, |
|
|
int type); |
|
|
|
|
|
|
|
53 |
/* Check whether to allow access to a node, testing the allow_root and |
/* Check whether to allow access to a node, testing the allow_root and |
54 |
* allow_other flag. This does not check whether default permissions |
* allow_other flag. This does not check whether default permissions |
55 |
* are okay to allow access. |
* are okay to allow access. |
1141 |
((DIRENT_NAME_OFFS + (name_len) + 1 + (DIRENT_ALIGN - 1)) \ |
((DIRENT_NAME_OFFS + (name_len) + 1 + (DIRENT_ALIGN - 1)) \ |
1142 |
& ~(DIRENT_ALIGN - 1)) |
& ~(DIRENT_ALIGN - 1)) |
1143 |
|
|
1144 |
|
/* fuse_get_inode |
1145 |
|
* |
1146 |
|
* look up the inode of the named file (full path) in fuse_use_ino mode, |
1147 |
|
* where we don't have the inode number of parent directories in our structs |
1148 |
|
*/ |
1149 |
|
static ino_t |
1150 |
|
fuse_get_inode(const char *name) |
1151 |
|
{ |
1152 |
|
struct stat stat; |
1153 |
|
|
1154 |
|
assert(fuse_ops); |
1155 |
|
assert(fuse_ops->getattr); |
1156 |
|
|
1157 |
|
fuse_ops->getattr(name, &stat); |
1158 |
|
return stat.st_ino; |
1159 |
|
} |
1160 |
|
|
1161 |
/* callback handler used by netfs_get_dirents to write our dirents |
/* callback handler used by netfs_get_dirents to write our dirents |
1162 |
* to the mmaped memory |
* to the mmaped memory (getdir case) |
|
* |
|
|
* version for new fuse api |
|
1163 |
*/ |
*/ |
1164 |
static int |
static int |
1165 |
fuse_dirent_helper(fuse_dirh_t handle, const char *name, int type, ino_t ino) |
get_dirents_getdir_helper(fuse_dirh_t handle, const char *name, |
1166 |
|
int type, ino_t ino) |
1167 |
{ |
{ |
1168 |
ino_t inode; |
ino_t inode; |
1169 |
|
|
|
/* if(! fuse_use_ino) |
|
|
* return fuse_dirent_helper_compat(handle, name, type); |
|
|
*/ |
|
|
|
|
|
/* fuse_get_inode |
|
|
* |
|
|
* look up the inode of the named file (full path) in fuse_use_ino mode, |
|
|
* where we don't have the inode number of parent directories in our structs |
|
|
*/ |
|
|
ino_t fuse_get_inode(const char *name) |
|
|
{ |
|
|
struct stat stat; |
|
|
|
|
|
assert(fuse_ops); |
|
|
assert(fuse_ops->getattr); |
|
|
|
|
|
fuse_ops->getattr(name, &stat); |
|
|
return stat.st_ino; |
|
|
} |
|
|
|
|
1170 |
if(handle->first_entry) |
if(handle->first_entry) |
1171 |
{ |
{ |
1172 |
/* skip this entry, it's before the first one we got to write out ... */ |
/* skip this entry, it's before the first one we got to write out ... */ |
1229 |
strcpy(handle->filename, name); |
strcpy(handle->filename, name); |
1230 |
struct netnode *nn = fuse_make_netnode(handle->parent, |
struct netnode *nn = fuse_make_netnode(handle->parent, |
1231 |
handle->abspath); |
handle->abspath); |
1232 |
|
|
1233 |
|
if(! nn) |
1234 |
|
return ENOMEM; |
1235 |
|
|
1236 |
inode = nn->inode; |
inode = nn->inode; |
1237 |
} |
} |
1238 |
} |
} |
1254 |
} |
} |
1255 |
|
|
1256 |
|
|
|
|
|
1257 |
/* callback handler used by netfs_get_dirents to write our dirents |
/* callback handler used by netfs_get_dirents to write our dirents |
1258 |
* to the mmaped memory |
* to the mmaped memory |
1259 |
* |
* |
1260 |
* version for old api |
* version for old api |
1261 |
*/ |
*/ |
1262 |
static int |
static int |
1263 |
fuse_dirent_helper_compat(fuse_dirh_t handle, const char *name, int type) |
get_dirents_getdir_helper_compat(fuse_dirh_t hdl, const char *name, int type) |
1264 |
{ |
{ |
1265 |
return fuse_dirent_helper(handle, name, type, 0); |
return get_dirents_getdir_helper(hdl, name, type, 0); |
1266 |
} |
} |
1267 |
|
|
1268 |
|
|
1269 |
error_t |
static error_t |
1270 |
netfs_get_dirents (struct iouser *cred, struct node *dir, |
get_dirents_getdir(struct node *dir, int first_entry, int num_entries, |
1271 |
int first_entry, int num_entries, char **data, |
char **data, mach_msg_type_number_t *data_len, |
1272 |
mach_msg_type_number_t *data_len, |
int *data_entries) |
|
vm_size_t max_data_len, int *data_entries) |
|
1273 |
{ |
{ |
1274 |
(void) max_data_len; /* we live with the supplied mmap area in any case, |
FUNC_PROLOGUE_NODE("get_dirents_getdir", dir); |
1275 |
* i.e. never allocate any further memory */ |
|
1276 |
|
if(! FUSE_OP_HAVE(getdir)) |
1277 |
|
FUNC_RETURN(EOPNOTSUPP); |
1278 |
|
|
|
FUNC_PROLOGUE_NODE("netfs_get_dirents", dir); |
|
|
error_t err; |
|
1279 |
fuse_dirh_t handle; |
fuse_dirh_t handle; |
1280 |
|
if(! (handle = malloc(sizeof(struct fuse_dirhandle)))) |
1281 |
|
FUNC_RETURN(ENOMEM); |
1282 |
|
|
1283 |
|
handle->first_entry = first_entry; |
1284 |
|
handle->num_entries = num_entries; |
1285 |
|
handle->count = 0; |
1286 |
|
handle->size = *data_len; |
1287 |
|
|
1288 |
if((err = netfs_validate_stat(dir, cred)) |
/* allocate handle->abspath */ |
1289 |
|| (err = fshelp_access(&dir->nn_stat, S_IREAD, cred)) |
size_t path_len = strlen(dir->nn->path); |
1290 |
|| (err = fshelp_access(&dir->nn_stat, S_IEXEC, cred))) |
if(! (handle->abspath = malloc((handle->maxlen = 256) + path_len + 2))) |
1291 |
goto out; |
{ |
1292 |
|
free(handle); |
1293 |
|
FUNC_RETURN(ENOMEM); |
1294 |
|
} |
1295 |
|
|
1296 |
if(! FUSE_OP_HAVE(getdir)) |
memcpy(handle->abspath, dir->nn->path, path_len); |
1297 |
|
handle->filename = handle->abspath + path_len; |
1298 |
|
|
1299 |
|
/* add a delimiting slash if there are parent directories */ |
1300 |
|
if(dir->nn->parent) |
1301 |
|
*(handle->filename ++) = '/'; |
1302 |
|
|
1303 |
|
handle->parent = dir->nn; |
1304 |
|
handle->hdrpos = (struct dirent*) *data; |
1305 |
|
|
1306 |
|
if(fuse_ops) |
1307 |
|
fuse_ops->getdir(dir->nn->path, handle, get_dirents_getdir_helper); |
1308 |
|
else |
1309 |
|
fuse_ops_compat->getdir(dir->nn->path, handle, |
1310 |
|
get_dirents_getdir_helper_compat); |
1311 |
|
|
1312 |
|
|
1313 |
|
*data_len -= handle->size; /* subtract number of bytes left in the |
1314 |
|
* buffer from the length of the buffer we |
1315 |
|
* got. */ |
1316 |
|
*data_entries = handle->count; |
1317 |
|
|
1318 |
|
free(handle->abspath); |
1319 |
|
free(handle); |
1320 |
|
|
1321 |
|
FUNC_EPILOGUE(0); |
1322 |
|
} |
1323 |
|
|
1324 |
|
|
1325 |
|
/* callback handler used by netfs_get_dirents to write our dirents |
1326 |
|
* to the mmaped memory (in readdir case) |
1327 |
|
* |
1328 |
|
* be careful, according to fuse.h `stat' may be NULL! |
1329 |
|
*/ |
1330 |
|
static int |
1331 |
|
get_dirents_readdir_helper(void *buf, const char *name, |
1332 |
|
const struct stat *stat, off_t off) |
1333 |
|
{ |
1334 |
|
fuse_dirh_t handle = buf; |
1335 |
|
ino_t inode; |
1336 |
|
|
1337 |
|
if(handle->first_entry && !off) |
1338 |
{ |
{ |
1339 |
err = EOPNOTSUPP; |
/* skip this entry, it's before the first one |
1340 |
goto out; |
* we got to write out ... */ |
1341 |
|
handle->first_entry --; |
1342 |
|
return 0; |
1343 |
} |
} |
1344 |
|
|
1345 |
if(! (handle = malloc(sizeof(struct fuse_dirhandle)))) |
if(! (handle->num_entries --)) |
1346 |
|
return 1; |
1347 |
|
|
1348 |
|
size_t name_len = strlen(name); |
1349 |
|
size_t dirent_len = DIRENT_LEN(name_len); |
1350 |
|
|
1351 |
|
if(dirent_len > handle->size) |
1352 |
{ |
{ |
1353 |
err = ENOMEM; /* sorry, translator not available ... */ |
handle->num_entries = 0; /* don't write any further data, e.g. in case */ |
1354 |
goto out; |
return ENOMEM; /* next filename's shorter */ |
1355 |
|
} |
1356 |
|
else |
1357 |
|
handle->size -= dirent_len; |
1358 |
|
|
1359 |
|
/* look the inode of this element up ... */ |
1360 |
|
if(libfuse_params.use_ino) |
1361 |
|
{ |
1362 |
|
/* using the inode based api */ |
1363 |
|
if(! strcmp(name, ".")) |
1364 |
|
inode = fuse_get_inode(handle->parent->path); |
1365 |
|
|
1366 |
|
else if(handle->parent->parent && ! strcmp(name, "..")) |
1367 |
|
inode = fuse_get_inode(handle->parent->parent->path); |
1368 |
|
|
1369 |
|
if(! stat) |
1370 |
|
{ |
1371 |
|
DEBUG("critical", "use_ino flag set, but stat ptr not available.\n"); |
1372 |
|
inode = 0; |
1373 |
|
} |
1374 |
|
|
1375 |
|
else |
1376 |
|
inode = stat->st_ino; |
1377 |
} |
} |
1378 |
|
else |
1379 |
|
{ |
1380 |
|
/* using the old (lookup) method ... */ |
1381 |
|
|
1382 |
|
if(! strcmp(name, ".")) |
1383 |
|
inode = handle->parent->inode; |
1384 |
|
|
1385 |
|
else if(handle->parent->parent && ! strcmp(name, "..")) |
1386 |
|
inode = handle->parent->parent->inode; |
1387 |
|
|
1388 |
|
else |
1389 |
|
{ |
1390 |
|
if(name_len > handle->maxlen) |
1391 |
|
{ |
1392 |
|
/* allocated field in handle structure is to small, enlarge it */ |
1393 |
|
handle->maxlen = name_len << 1; |
1394 |
|
void *a = realloc(handle->abspath, handle->maxlen + |
1395 |
|
(handle->filename - handle->abspath) + 1); |
1396 |
|
if(! a) |
1397 |
|
return ENOMEM; |
1398 |
|
|
1399 |
|
handle->filename = a + (handle->filename - handle->abspath); |
1400 |
|
handle->abspath = a; |
1401 |
|
} |
1402 |
|
|
1403 |
|
strcpy(handle->filename, name); |
1404 |
|
struct netnode *nn = fuse_make_netnode(handle->parent, |
1405 |
|
handle->abspath); |
1406 |
|
|
1407 |
|
if(! nn) |
1408 |
|
return ENOMEM; |
1409 |
|
|
1410 |
|
inode = nn->inode; |
1411 |
|
} |
1412 |
|
} |
1413 |
|
|
1414 |
|
/* write out struct dirent ... */ |
1415 |
|
handle->hdrpos->d_fileno = inode; |
1416 |
|
handle->hdrpos->d_reclen = dirent_len; |
1417 |
|
handle->hdrpos->d_type = stat ? (stat->st_mode >> 12) : 0; |
1418 |
|
handle->hdrpos->d_namlen = name_len; |
1419 |
|
|
1420 |
|
/* copy file's name ... */ |
1421 |
|
memcpy(((void *) handle->hdrpos) + DIRENT_NAME_OFFS, name, name_len + 1); |
1422 |
|
|
1423 |
|
/* update hdrpos pointer */ |
1424 |
|
handle->hdrpos = ((void *) handle->hdrpos) + dirent_len; |
1425 |
|
|
1426 |
|
handle->count ++; |
1427 |
|
return 0; |
1428 |
|
} |
1429 |
|
|
1430 |
|
|
1431 |
|
static error_t |
1432 |
|
get_dirents_readdir(struct node *dir, int first_entry, int num_entries, |
1433 |
|
char **data, mach_msg_type_number_t *data_len, |
1434 |
|
int *data_entries) |
1435 |
|
{ |
1436 |
|
error_t err; |
1437 |
|
FUNC_PROLOGUE_NODE("get_dirents_readdir", dir); |
1438 |
|
|
1439 |
|
if(! (fuse_ops |
1440 |
|
&& fuse_ops->readdir |
1441 |
|
&& fuse_ops->opendir |
1442 |
|
&& fuse_ops->releasedir)) |
1443 |
|
FUNC_RETURN(EOPNOTSUPP); |
1444 |
|
|
1445 |
|
fuse_dirh_t handle; |
1446 |
|
if(! (handle = malloc(sizeof(struct fuse_dirhandle)))) |
1447 |
|
FUNC_RETURN(ENOMEM); |
1448 |
|
|
1449 |
handle->first_entry = first_entry; |
handle->first_entry = first_entry; |
1450 |
handle->num_entries = num_entries; |
handle->num_entries = num_entries; |
1451 |
handle->count = 0; |
handle->count = 0; |
1455 |
size_t path_len = strlen(dir->nn->path); |
size_t path_len = strlen(dir->nn->path); |
1456 |
if(! (handle->abspath = malloc((handle->maxlen = 256) + path_len + 2))) |
if(! (handle->abspath = malloc((handle->maxlen = 256) + path_len + 2))) |
1457 |
{ |
{ |
|
free(handle); |
|
1458 |
err = ENOMEM; |
err = ENOMEM; |
1459 |
goto out; |
goto out; |
1460 |
} |
} |
1469 |
handle->parent = dir->nn; |
handle->parent = dir->nn; |
1470 |
handle->hdrpos = (struct dirent*) *data; |
handle->hdrpos = (struct dirent*) *data; |
1471 |
|
|
1472 |
if(fuse_ops) |
if((err = fuse_ops->opendir(dir->nn->path, &dir->nn->info))) |
1473 |
fuse_ops->getdir(dir->nn->path, handle, fuse_dirent_helper); |
goto out; |
1474 |
else |
|
1475 |
fuse_ops_compat->getdir(dir->nn->path, handle, fuse_dirent_helper_compat); |
if((err = fuse_ops->readdir(dir->nn->path, handle, |
1476 |
|
get_dirents_readdir_helper, first_entry, |
1477 |
|
&dir->nn->info))) |
1478 |
|
{ |
1479 |
|
fuse_ops->releasedir(dir->nn->path, &dir->nn->info); |
1480 |
|
goto out; |
1481 |
|
} |
1482 |
|
|
1483 |
|
if((err = fuse_ops->releasedir(dir->nn->path, &dir->nn->info))) |
1484 |
|
goto out; |
1485 |
|
|
1486 |
*data_len -= handle->size; /* subtract number of bytes left in the |
*data_len -= handle->size; /* subtract number of bytes left in the |
1487 |
* buffer from the length of the buffer we |
* buffer from the length of the buffer we |
1488 |
* got. */ |
* got. */ |
1489 |
*data_entries = handle->count; |
*data_entries = handle->count; |
1490 |
|
|
1491 |
/* TODO: fshelp_touch ATIME here */ |
out: |
1492 |
free(handle->abspath); |
free(handle->abspath); |
1493 |
free(handle); |
free(handle); |
1494 |
|
|
1495 |
|
FUNC_EPILOGUE(err); |
1496 |
|
} |
1497 |
|
|
1498 |
|
error_t |
1499 |
|
netfs_get_dirents (struct iouser *cred, struct node *dir, |
1500 |
|
int first_entry, int num_entries, char **data, |
1501 |
|
mach_msg_type_number_t *data_len, |
1502 |
|
vm_size_t max_data_len, int *data_entries) |
1503 |
|
{ |
1504 |
|
(void) max_data_len; /* we live with the supplied mmap area in any case, |
1505 |
|
* i.e. never allocate any further memory */ |
1506 |
|
|
1507 |
|
FUNC_PROLOGUE_NODE("netfs_get_dirents", dir); |
1508 |
|
error_t err; |
1509 |
|
|
1510 |
|
if((err = netfs_validate_stat(dir, cred)) |
1511 |
|
|| (err = fshelp_access(&dir->nn_stat, S_IREAD, cred)) |
1512 |
|
|| (err = fshelp_access(&dir->nn_stat, S_IEXEC, cred))) |
1513 |
|
goto out; |
1514 |
|
|
1515 |
|
|
1516 |
|
if(fuse_ops && fuse_ops->readdir) |
1517 |
|
err = get_dirents_readdir(dir, first_entry, num_entries, data, data_len, |
1518 |
|
data_entries); |
1519 |
|
|
1520 |
|
else if(FUSE_OP_HAVE(getdir)) |
1521 |
|
err = get_dirents_getdir(dir, first_entry, num_entries, data, data_len, |
1522 |
|
data_entries); |
1523 |
|
|
1524 |
|
else |
1525 |
|
err = EOPNOTSUPP; |
1526 |
|
|
1527 |
|
/* TODO: fshelp_touch ATIME here */ |
1528 |
|
|
1529 |
out: |
out: |
1530 |
FUNC_EPILOGUE_FMT(err, "%d entries.", *data_entries); |
FUNC_EPILOGUE_FMT(err, "%d entries.", *data_entries); |
1531 |
} |
} |