1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * (C) 2001 Clemson University and The University of Chicago 4 * 5 * See COPYING in top-level directory. 6 */ 7 #include <linux/kernel.h> 8 #include "protocol.h" 9 #include "orangefs-kernel.h" 10 #include "orangefs-dev-proto.h" 11 #include "orangefs-bufmap.h" 12 13 __s32 fsid_of_op(struct orangefs_kernel_op_s *op) 14 { 15 __s32 fsid = ORANGEFS_FS_ID_NULL; 16 17 if (op) { 18 switch (op->upcall.type) { 19 case ORANGEFS_VFS_OP_FILE_IO: 20 fsid = op->upcall.req.io.refn.fs_id; 21 break; 22 case ORANGEFS_VFS_OP_LOOKUP: 23 fsid = op->upcall.req.lookup.parent_refn.fs_id; 24 break; 25 case ORANGEFS_VFS_OP_CREATE: 26 fsid = op->upcall.req.create.parent_refn.fs_id; 27 break; 28 case ORANGEFS_VFS_OP_GETATTR: 29 fsid = op->upcall.req.getattr.refn.fs_id; 30 break; 31 case ORANGEFS_VFS_OP_REMOVE: 32 fsid = op->upcall.req.remove.parent_refn.fs_id; 33 break; 34 case ORANGEFS_VFS_OP_MKDIR: 35 fsid = op->upcall.req.mkdir.parent_refn.fs_id; 36 break; 37 case ORANGEFS_VFS_OP_READDIR: 38 fsid = op->upcall.req.readdir.refn.fs_id; 39 break; 40 case ORANGEFS_VFS_OP_SETATTR: 41 fsid = op->upcall.req.setattr.refn.fs_id; 42 break; 43 case ORANGEFS_VFS_OP_SYMLINK: 44 fsid = op->upcall.req.sym.parent_refn.fs_id; 45 break; 46 case ORANGEFS_VFS_OP_RENAME: 47 fsid = op->upcall.req.rename.old_parent_refn.fs_id; 48 break; 49 case ORANGEFS_VFS_OP_STATFS: 50 fsid = op->upcall.req.statfs.fs_id; 51 break; 52 case ORANGEFS_VFS_OP_TRUNCATE: 53 fsid = op->upcall.req.truncate.refn.fs_id; 54 break; 55 case ORANGEFS_VFS_OP_RA_FLUSH: 56 fsid = op->upcall.req.ra_cache_flush.refn.fs_id; 57 break; 58 case ORANGEFS_VFS_OP_FS_UMOUNT: 59 fsid = op->upcall.req.fs_umount.fs_id; 60 break; 61 case ORANGEFS_VFS_OP_GETXATTR: 62 fsid = op->upcall.req.getxattr.refn.fs_id; 63 break; 64 case ORANGEFS_VFS_OP_SETXATTR: 65 fsid = op->upcall.req.setxattr.refn.fs_id; 66 break; 67 case ORANGEFS_VFS_OP_LISTXATTR: 68 fsid = op->upcall.req.listxattr.refn.fs_id; 69 break; 70 case ORANGEFS_VFS_OP_REMOVEXATTR: 71 fsid = op->upcall.req.removexattr.refn.fs_id; 72 break; 73 case ORANGEFS_VFS_OP_FSYNC: 74 fsid = op->upcall.req.fsync.refn.fs_id; 75 break; 76 default: 77 break; 78 } 79 } 80 return fsid; 81 } 82 83 static int orangefs_inode_flags(struct ORANGEFS_sys_attr_s *attrs) 84 { 85 int flags = 0; 86 if (attrs->flags & ORANGEFS_IMMUTABLE_FL) 87 flags |= S_IMMUTABLE; 88 else 89 flags &= ~S_IMMUTABLE; 90 if (attrs->flags & ORANGEFS_APPEND_FL) 91 flags |= S_APPEND; 92 else 93 flags &= ~S_APPEND; 94 if (attrs->flags & ORANGEFS_NOATIME_FL) 95 flags |= S_NOATIME; 96 else 97 flags &= ~S_NOATIME; 98 return flags; 99 } 100 101 static int orangefs_inode_perms(struct ORANGEFS_sys_attr_s *attrs) 102 { 103 int perm_mode = 0; 104 105 if (attrs->perms & ORANGEFS_O_EXECUTE) 106 perm_mode |= S_IXOTH; 107 if (attrs->perms & ORANGEFS_O_WRITE) 108 perm_mode |= S_IWOTH; 109 if (attrs->perms & ORANGEFS_O_READ) 110 perm_mode |= S_IROTH; 111 112 if (attrs->perms & ORANGEFS_G_EXECUTE) 113 perm_mode |= S_IXGRP; 114 if (attrs->perms & ORANGEFS_G_WRITE) 115 perm_mode |= S_IWGRP; 116 if (attrs->perms & ORANGEFS_G_READ) 117 perm_mode |= S_IRGRP; 118 119 if (attrs->perms & ORANGEFS_U_EXECUTE) 120 perm_mode |= S_IXUSR; 121 if (attrs->perms & ORANGEFS_U_WRITE) 122 perm_mode |= S_IWUSR; 123 if (attrs->perms & ORANGEFS_U_READ) 124 perm_mode |= S_IRUSR; 125 126 if (attrs->perms & ORANGEFS_G_SGID) 127 perm_mode |= S_ISGID; 128 if (attrs->perms & ORANGEFS_U_SUID) 129 perm_mode |= S_ISUID; 130 131 return perm_mode; 132 } 133 134 /* 135 * NOTE: in kernel land, we never use the sys_attr->link_target for 136 * anything, so don't bother copying it into the sys_attr object here. 137 */ 138 static inline int copy_attributes_from_inode(struct inode *inode, 139 struct ORANGEFS_sys_attr_s *attrs, 140 struct iattr *iattr) 141 { 142 umode_t tmp_mode; 143 144 if (!iattr || !inode || !attrs) { 145 gossip_err("NULL iattr (%p), inode (%p), attrs (%p) " 146 "in copy_attributes_from_inode!\n", 147 iattr, 148 inode, 149 attrs); 150 return -EINVAL; 151 } 152 /* 153 * We need to be careful to only copy the attributes out of the 154 * iattr object that we know are valid. 155 */ 156 attrs->mask = 0; 157 if (iattr->ia_valid & ATTR_UID) { 158 attrs->owner = from_kuid(&init_user_ns, iattr->ia_uid); 159 attrs->mask |= ORANGEFS_ATTR_SYS_UID; 160 gossip_debug(GOSSIP_UTILS_DEBUG, "(UID) %d\n", attrs->owner); 161 } 162 if (iattr->ia_valid & ATTR_GID) { 163 attrs->group = from_kgid(&init_user_ns, iattr->ia_gid); 164 attrs->mask |= ORANGEFS_ATTR_SYS_GID; 165 gossip_debug(GOSSIP_UTILS_DEBUG, "(GID) %d\n", attrs->group); 166 } 167 168 if (iattr->ia_valid & ATTR_ATIME) { 169 attrs->mask |= ORANGEFS_ATTR_SYS_ATIME; 170 if (iattr->ia_valid & ATTR_ATIME_SET) { 171 attrs->atime = (time64_t)iattr->ia_atime.tv_sec; 172 attrs->mask |= ORANGEFS_ATTR_SYS_ATIME_SET; 173 } 174 } 175 if (iattr->ia_valid & ATTR_MTIME) { 176 attrs->mask |= ORANGEFS_ATTR_SYS_MTIME; 177 if (iattr->ia_valid & ATTR_MTIME_SET) { 178 attrs->mtime = (time64_t)iattr->ia_mtime.tv_sec; 179 attrs->mask |= ORANGEFS_ATTR_SYS_MTIME_SET; 180 } 181 } 182 if (iattr->ia_valid & ATTR_CTIME) 183 attrs->mask |= ORANGEFS_ATTR_SYS_CTIME; 184 185 /* 186 * ORANGEFS cannot set size with a setattr operation. Probably not 187 * likely to be requested through the VFS, but just in case, don't 188 * worry about ATTR_SIZE 189 */ 190 191 if (iattr->ia_valid & ATTR_MODE) { 192 tmp_mode = iattr->ia_mode; 193 if (tmp_mode & (S_ISVTX)) { 194 if (is_root_handle(inode)) { 195 /* 196 * allow sticky bit to be set on root (since 197 * it shows up that way by default anyhow), 198 * but don't show it to the server 199 */ 200 tmp_mode -= S_ISVTX; 201 } else { 202 gossip_debug(GOSSIP_UTILS_DEBUG, 203 "%s: setting sticky bit not supported.\n", 204 __func__); 205 return -EINVAL; 206 } 207 } 208 209 if (tmp_mode & (S_ISUID)) { 210 gossip_debug(GOSSIP_UTILS_DEBUG, 211 "%s: setting setuid bit not supported.\n", 212 __func__); 213 return -EINVAL; 214 } 215 216 attrs->perms = ORANGEFS_util_translate_mode(tmp_mode); 217 attrs->mask |= ORANGEFS_ATTR_SYS_PERM; 218 } 219 220 return 0; 221 } 222 223 static int orangefs_inode_type(enum orangefs_ds_type objtype) 224 { 225 if (objtype == ORANGEFS_TYPE_METAFILE) 226 return S_IFREG; 227 else if (objtype == ORANGEFS_TYPE_DIRECTORY) 228 return S_IFDIR; 229 else if (objtype == ORANGEFS_TYPE_SYMLINK) 230 return S_IFLNK; 231 else 232 return -1; 233 } 234 235 static void orangefs_make_bad_inode(struct inode *inode) 236 { 237 if (is_root_handle(inode)) { 238 /* 239 * if this occurs, the pvfs2-client-core was killed but we 240 * can't afford to lose the inode operations and such 241 * associated with the root handle in any case. 242 */ 243 gossip_debug(GOSSIP_UTILS_DEBUG, 244 "*** NOT making bad root inode %pU\n", 245 get_khandle_from_ino(inode)); 246 } else { 247 gossip_debug(GOSSIP_UTILS_DEBUG, 248 "*** making bad inode %pU\n", 249 get_khandle_from_ino(inode)); 250 make_bad_inode(inode); 251 } 252 } 253 254 static int orangefs_inode_is_stale(struct inode *inode, 255 struct ORANGEFS_sys_attr_s *attrs, char *link_target) 256 { 257 struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode); 258 int type = orangefs_inode_type(attrs->objtype); 259 /* 260 * If the inode type or symlink target have changed then this 261 * inode is stale. 262 */ 263 if (type == -1 || !(inode->i_mode & type)) { 264 orangefs_make_bad_inode(inode); 265 return 1; 266 } 267 if (type == S_IFLNK && strncmp(orangefs_inode->link_target, 268 link_target, ORANGEFS_NAME_MAX)) { 269 orangefs_make_bad_inode(inode); 270 return 1; 271 } 272 return 0; 273 } 274 275 int orangefs_inode_getattr(struct inode *inode, int new, int bypass, 276 u32 request_mask) 277 { 278 struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode); 279 struct orangefs_kernel_op_s *new_op; 280 loff_t inode_size; 281 int ret, type; 282 283 gossip_debug(GOSSIP_UTILS_DEBUG, "%s: called on inode %pU\n", __func__, 284 get_khandle_from_ino(inode)); 285 286 if (!new && !bypass) { 287 /* 288 * Must have all the attributes in the mask and be within cache 289 * time. 290 */ 291 if ((request_mask & orangefs_inode->getattr_mask) == 292 request_mask && 293 time_before(jiffies, orangefs_inode->getattr_time)) 294 return 0; 295 } 296 297 new_op = op_alloc(ORANGEFS_VFS_OP_GETATTR); 298 if (!new_op) 299 return -ENOMEM; 300 new_op->upcall.req.getattr.refn = orangefs_inode->refn; 301 /* 302 * Size is the hardest attribute to get. The incremental cost of any 303 * other attribute is essentially zero. 304 */ 305 if (request_mask & STATX_SIZE || new) 306 new_op->upcall.req.getattr.mask = ORANGEFS_ATTR_SYS_ALL_NOHINT; 307 else 308 new_op->upcall.req.getattr.mask = 309 ORANGEFS_ATTR_SYS_ALL_NOHINT & ~ORANGEFS_ATTR_SYS_SIZE; 310 311 ret = service_operation(new_op, __func__, 312 get_interruptible_flag(inode)); 313 if (ret != 0) 314 goto out; 315 316 if (!new) { 317 ret = orangefs_inode_is_stale(inode, 318 &new_op->downcall.resp.getattr.attributes, 319 new_op->downcall.resp.getattr.link_target); 320 if (ret) { 321 ret = -ESTALE; 322 goto out; 323 } 324 } 325 326 type = orangefs_inode_type(new_op-> 327 downcall.resp.getattr.attributes.objtype); 328 switch (type) { 329 case S_IFREG: 330 inode->i_flags = orangefs_inode_flags(&new_op-> 331 downcall.resp.getattr.attributes); 332 if (request_mask & STATX_SIZE || new) { 333 inode_size = (loff_t)new_op-> 334 downcall.resp.getattr.attributes.size; 335 inode->i_size = inode_size; 336 inode->i_blkbits = ffs(new_op->downcall.resp.getattr. 337 attributes.blksize); 338 spin_lock(&inode->i_lock); 339 inode->i_bytes = inode_size; 340 inode->i_blocks = 341 (inode_size + 512 - inode_size % 512)/512; 342 spin_unlock(&inode->i_lock); 343 } 344 break; 345 case S_IFDIR: 346 if (request_mask & STATX_SIZE || new) { 347 inode->i_size = PAGE_SIZE; 348 spin_lock(&inode->i_lock); 349 inode_set_bytes(inode, inode->i_size); 350 spin_unlock(&inode->i_lock); 351 } 352 set_nlink(inode, 1); 353 break; 354 case S_IFLNK: 355 if (new) { 356 inode->i_size = (loff_t)strlen(new_op-> 357 downcall.resp.getattr.link_target); 358 ret = strscpy(orangefs_inode->link_target, 359 new_op->downcall.resp.getattr.link_target, 360 ORANGEFS_NAME_MAX); 361 if (ret == -E2BIG) { 362 ret = -EIO; 363 goto out; 364 } 365 inode->i_link = orangefs_inode->link_target; 366 } 367 break; 368 /* i.e. -1 */ 369 default: 370 /* XXX: ESTALE? This is what is done if it is not new. */ 371 orangefs_make_bad_inode(inode); 372 ret = -ESTALE; 373 goto out; 374 } 375 376 inode->i_uid = make_kuid(&init_user_ns, new_op-> 377 downcall.resp.getattr.attributes.owner); 378 inode->i_gid = make_kgid(&init_user_ns, new_op-> 379 downcall.resp.getattr.attributes.group); 380 inode->i_atime.tv_sec = (time64_t)new_op-> 381 downcall.resp.getattr.attributes.atime; 382 inode->i_mtime.tv_sec = (time64_t)new_op-> 383 downcall.resp.getattr.attributes.mtime; 384 inode->i_ctime.tv_sec = (time64_t)new_op-> 385 downcall.resp.getattr.attributes.ctime; 386 inode->i_atime.tv_nsec = 0; 387 inode->i_mtime.tv_nsec = 0; 388 inode->i_ctime.tv_nsec = 0; 389 390 /* special case: mark the root inode as sticky */ 391 inode->i_mode = type | (is_root_handle(inode) ? S_ISVTX : 0) | 392 orangefs_inode_perms(&new_op->downcall.resp.getattr.attributes); 393 394 orangefs_inode->getattr_time = jiffies + 395 orangefs_getattr_timeout_msecs*HZ/1000; 396 if (request_mask & STATX_SIZE || new) 397 orangefs_inode->getattr_mask = STATX_BASIC_STATS; 398 else 399 orangefs_inode->getattr_mask = STATX_BASIC_STATS & ~STATX_SIZE; 400 ret = 0; 401 out: 402 op_release(new_op); 403 return ret; 404 } 405 406 int orangefs_inode_check_changed(struct inode *inode) 407 { 408 struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode); 409 struct orangefs_kernel_op_s *new_op; 410 int ret; 411 412 gossip_debug(GOSSIP_UTILS_DEBUG, "%s: called on inode %pU\n", __func__, 413 get_khandle_from_ino(inode)); 414 415 new_op = op_alloc(ORANGEFS_VFS_OP_GETATTR); 416 if (!new_op) 417 return -ENOMEM; 418 new_op->upcall.req.getattr.refn = orangefs_inode->refn; 419 new_op->upcall.req.getattr.mask = ORANGEFS_ATTR_SYS_TYPE | 420 ORANGEFS_ATTR_SYS_LNK_TARGET; 421 422 ret = service_operation(new_op, __func__, 423 get_interruptible_flag(inode)); 424 if (ret != 0) 425 goto out; 426 427 ret = orangefs_inode_is_stale(inode, 428 &new_op->downcall.resp.getattr.attributes, 429 new_op->downcall.resp.getattr.link_target); 430 out: 431 op_release(new_op); 432 return ret; 433 } 434 435 /* 436 * issues a orangefs setattr request to make sure the new attribute values 437 * take effect if successful. returns 0 on success; -errno otherwise 438 */ 439 int orangefs_inode_setattr(struct inode *inode, struct iattr *iattr) 440 { 441 struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode); 442 struct orangefs_kernel_op_s *new_op; 443 int ret; 444 445 new_op = op_alloc(ORANGEFS_VFS_OP_SETATTR); 446 if (!new_op) 447 return -ENOMEM; 448 449 new_op->upcall.req.setattr.refn = orangefs_inode->refn; 450 ret = copy_attributes_from_inode(inode, 451 &new_op->upcall.req.setattr.attributes, 452 iattr); 453 if (ret >= 0) { 454 ret = service_operation(new_op, __func__, 455 get_interruptible_flag(inode)); 456 457 gossip_debug(GOSSIP_UTILS_DEBUG, 458 "orangefs_inode_setattr: returning %d\n", 459 ret); 460 } 461 462 op_release(new_op); 463 464 if (ret == 0) 465 orangefs_inode->getattr_time = jiffies - 1; 466 467 return ret; 468 } 469 470 /* 471 * The following is a very dirty hack that is now a permanent part of the 472 * ORANGEFS protocol. See protocol.h for more error definitions. 473 */ 474 475 /* The order matches include/orangefs-types.h in the OrangeFS source. */ 476 static int PINT_errno_mapping[] = { 477 0, EPERM, ENOENT, EINTR, EIO, ENXIO, EBADF, EAGAIN, ENOMEM, 478 EFAULT, EBUSY, EEXIST, ENODEV, ENOTDIR, EISDIR, EINVAL, EMFILE, 479 EFBIG, ENOSPC, EROFS, EMLINK, EPIPE, EDEADLK, ENAMETOOLONG, 480 ENOLCK, ENOSYS, ENOTEMPTY, ELOOP, EWOULDBLOCK, ENOMSG, EUNATCH, 481 EBADR, EDEADLOCK, ENODATA, ETIME, ENONET, EREMOTE, ECOMM, 482 EPROTO, EBADMSG, EOVERFLOW, ERESTART, EMSGSIZE, EPROTOTYPE, 483 ENOPROTOOPT, EPROTONOSUPPORT, EOPNOTSUPP, EADDRINUSE, 484 EADDRNOTAVAIL, ENETDOWN, ENETUNREACH, ENETRESET, ENOBUFS, 485 ETIMEDOUT, ECONNREFUSED, EHOSTDOWN, EHOSTUNREACH, EALREADY, 486 EACCES, ECONNRESET, ERANGE 487 }; 488 489 int orangefs_normalize_to_errno(__s32 error_code) 490 { 491 __u32 i; 492 493 /* Success */ 494 if (error_code == 0) { 495 return 0; 496 /* 497 * This shouldn't ever happen. If it does it should be fixed on the 498 * server. 499 */ 500 } else if (error_code > 0) { 501 gossip_err("orangefs: error status received.\n"); 502 gossip_err("orangefs: assuming error code is inverted.\n"); 503 error_code = -error_code; 504 } 505 506 /* 507 * XXX: This is very bad since error codes from ORANGEFS may not be 508 * suitable for return into userspace. 509 */ 510 511 /* 512 * Convert ORANGEFS error values into errno values suitable for return 513 * from the kernel. 514 */ 515 if ((-error_code) & ORANGEFS_NON_ERRNO_ERROR_BIT) { 516 if (((-error_code) & 517 (ORANGEFS_ERROR_NUMBER_BITS|ORANGEFS_NON_ERRNO_ERROR_BIT| 518 ORANGEFS_ERROR_BIT)) == ORANGEFS_ECANCEL) { 519 /* 520 * cancellation error codes generally correspond to 521 * a timeout from the client's perspective 522 */ 523 error_code = -ETIMEDOUT; 524 } else { 525 /* assume a default error code */ 526 gossip_err("%s: bad error code :%d:.\n", 527 __func__, 528 error_code); 529 error_code = -EINVAL; 530 } 531 532 /* Convert ORANGEFS encoded errno values into regular errno values. */ 533 } else if ((-error_code) & ORANGEFS_ERROR_BIT) { 534 i = (-error_code) & ~(ORANGEFS_ERROR_BIT|ORANGEFS_ERROR_CLASS_BITS); 535 if (i < ARRAY_SIZE(PINT_errno_mapping)) 536 error_code = -PINT_errno_mapping[i]; 537 else 538 error_code = -EINVAL; 539 540 /* 541 * Only ORANGEFS protocol error codes should ever come here. Otherwise 542 * there is a bug somewhere. 543 */ 544 } else { 545 gossip_err("%s: unknown error code.\n", __func__); 546 error_code = -EINVAL; 547 } 548 return error_code; 549 } 550 551 #define NUM_MODES 11 552 __s32 ORANGEFS_util_translate_mode(int mode) 553 { 554 int ret = 0; 555 int i = 0; 556 static int modes[NUM_MODES] = { 557 S_IXOTH, S_IWOTH, S_IROTH, 558 S_IXGRP, S_IWGRP, S_IRGRP, 559 S_IXUSR, S_IWUSR, S_IRUSR, 560 S_ISGID, S_ISUID 561 }; 562 static int orangefs_modes[NUM_MODES] = { 563 ORANGEFS_O_EXECUTE, ORANGEFS_O_WRITE, ORANGEFS_O_READ, 564 ORANGEFS_G_EXECUTE, ORANGEFS_G_WRITE, ORANGEFS_G_READ, 565 ORANGEFS_U_EXECUTE, ORANGEFS_U_WRITE, ORANGEFS_U_READ, 566 ORANGEFS_G_SGID, ORANGEFS_U_SUID 567 }; 568 569 for (i = 0; i < NUM_MODES; i++) 570 if (mode & modes[i]) 571 ret |= orangefs_modes[i]; 572 573 return ret; 574 } 575 #undef NUM_MODES 576