1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * (C) 2001 Clemson University and The University of Chicago 4 * Copyright 2018 Omnibond Systems, L.L.C. 5 * 6 * See COPYING in top-level directory. 7 */ 8 9 /* 10 * Linux VFS inode operations. 11 */ 12 13 #include <linux/blkdev.h> 14 #include <linux/fileattr.h> 15 #include "protocol.h" 16 #include "orangefs-kernel.h" 17 #include "orangefs-bufmap.h" 18 19 static int orangefs_writepage_locked(struct folio *folio, 20 struct writeback_control *wbc) 21 { 22 struct inode *inode = folio->mapping->host; 23 struct orangefs_write_range *wr = NULL; 24 struct iov_iter iter; 25 struct bio_vec bv; 26 size_t wlen; 27 ssize_t ret; 28 loff_t len, off; 29 30 folio_start_writeback(folio); 31 32 len = i_size_read(inode); 33 if (folio->private) { 34 wr = folio->private; 35 off = wr->pos; 36 if ((off + wr->len > len) && (off <= len)) 37 wlen = len - off; 38 else 39 wlen = wr->len; 40 if (wlen == 0) 41 wlen = wr->len; 42 } else { 43 WARN_ON(1); 44 off = folio_pos(folio); 45 wlen = folio_size(folio); 46 47 if (wlen > len - off) 48 wlen = len - off; 49 } 50 51 WARN_ON(wlen == 0); 52 bvec_set_folio(&bv, folio, wlen, offset_in_folio(folio, off)); 53 iov_iter_bvec(&iter, ITER_SOURCE, &bv, 1, wlen); 54 55 ret = wait_for_direct_io(ORANGEFS_IO_WRITE, inode, &off, &iter, wlen, 56 len, wr, NULL, NULL); 57 if (ret < 0) { 58 mapping_set_error(folio->mapping, ret); 59 } else { 60 ret = 0; 61 } 62 kfree(folio_detach_private(folio)); 63 return ret; 64 } 65 66 struct orangefs_writepages { 67 loff_t off; 68 size_t len; 69 kuid_t uid; 70 kgid_t gid; 71 int maxpages; 72 int nfolios; 73 struct address_space *mapping; 74 struct folio **folios; 75 struct bio_vec *bv; 76 }; 77 78 static int orangefs_writepages_work(struct orangefs_writepages *ow, 79 struct writeback_control *wbc) 80 { 81 struct inode *inode = ow->mapping->host; 82 struct orangefs_write_range *wrp, wr; 83 struct iov_iter iter; 84 ssize_t ret; 85 size_t start; 86 loff_t len, off; 87 int i; 88 89 len = i_size_read(inode); 90 91 start = offset_in_folio(ow->folios[0], ow->off); 92 for (i = 0; i < ow->nfolios; i++) { 93 folio_start_writeback(ow->folios[i]); 94 bvec_set_folio(&ow->bv[i], ow->folios[i], 95 folio_size(ow->folios[i]) - start, start); 96 start = 0; 97 } 98 iov_iter_bvec(&iter, ITER_SOURCE, ow->bv, ow->nfolios, ow->len); 99 100 WARN_ON(ow->off >= len); 101 if (ow->off + ow->len > len) 102 ow->len = len - ow->off; 103 104 off = ow->off; 105 wr.uid = ow->uid; 106 wr.gid = ow->gid; 107 ret = wait_for_direct_io(ORANGEFS_IO_WRITE, inode, &off, &iter, ow->len, 108 0, &wr, NULL, NULL); 109 if (ret < 0) 110 mapping_set_error(ow->mapping, ret); 111 else 112 ret = 0; 113 114 for (i = 0; i < ow->nfolios; i++) { 115 wrp = folio_detach_private(ow->folios[i]); 116 kfree(wrp); 117 folio_end_writeback(ow->folios[i]); 118 folio_unlock(ow->folios[i]); 119 } 120 121 return ret; 122 } 123 124 static int orangefs_writepages_callback(struct folio *folio, 125 struct writeback_control *wbc, struct orangefs_writepages *ow) 126 { 127 struct orangefs_write_range *wr = folio->private; 128 int ret; 129 130 if (!wr) { 131 folio_unlock(folio); 132 /* It's not private so there's nothing to write, right? */ 133 printk("writepages_callback not private!\n"); 134 BUG(); 135 return 0; 136 } 137 138 ret = -1; 139 if (ow->nfolios == 0) { 140 ow->off = wr->pos; 141 ow->len = wr->len; 142 ow->uid = wr->uid; 143 ow->gid = wr->gid; 144 ow->folios[ow->nfolios++] = folio; 145 ret = 0; 146 goto done; 147 } 148 if (!uid_eq(ow->uid, wr->uid) || !gid_eq(ow->gid, wr->gid)) { 149 orangefs_writepages_work(ow, wbc); 150 ow->nfolios = 0; 151 ret = -1; 152 goto done; 153 } 154 if (ow->off + ow->len == wr->pos) { 155 ow->len += wr->len; 156 ow->folios[ow->nfolios++] = folio; 157 ret = 0; 158 goto done; 159 } 160 done: 161 if (ret == -1) { 162 if (ow->nfolios) { 163 orangefs_writepages_work(ow, wbc); 164 ow->nfolios = 0; 165 } 166 ret = orangefs_writepage_locked(folio, wbc); 167 mapping_set_error(folio->mapping, ret); 168 folio_unlock(folio); 169 folio_end_writeback(folio); 170 } else { 171 if (ow->nfolios == ow->maxpages) { 172 orangefs_writepages_work(ow, wbc); 173 ow->nfolios = 0; 174 } 175 } 176 return ret; 177 } 178 179 static int orangefs_writepages(struct address_space *mapping, 180 struct writeback_control *wbc) 181 { 182 struct orangefs_writepages *ow; 183 struct blk_plug plug; 184 int error; 185 struct folio *folio = NULL; 186 187 ow = kzalloc(sizeof(struct orangefs_writepages), GFP_KERNEL); 188 if (!ow) 189 return -ENOMEM; 190 ow->maxpages = orangefs_bufmap_size_query()/PAGE_SIZE; 191 ow->folios = kcalloc(ow->maxpages, sizeof(struct folio *), GFP_KERNEL); 192 if (!ow->folios) { 193 kfree(ow); 194 return -ENOMEM; 195 } 196 ow->bv = kcalloc(ow->maxpages, sizeof(struct bio_vec), GFP_KERNEL); 197 if (!ow->bv) { 198 kfree(ow->folios); 199 kfree(ow); 200 return -ENOMEM; 201 } 202 ow->mapping = mapping; 203 blk_start_plug(&plug); 204 while ((folio = writeback_iter(mapping, wbc, folio, &error))) 205 error = orangefs_writepages_callback(folio, wbc, ow); 206 if (ow->nfolios) 207 error = orangefs_writepages_work(ow, wbc); 208 blk_finish_plug(&plug); 209 kfree(ow->folios); 210 kfree(ow->bv); 211 kfree(ow); 212 return error; 213 } 214 215 static int orangefs_launder_folio(struct folio *); 216 217 static void orangefs_readahead(struct readahead_control *rac) 218 { 219 loff_t offset; 220 struct iov_iter iter; 221 struct inode *inode = rac->mapping->host; 222 struct xarray *i_pages; 223 struct folio *folio; 224 loff_t new_start = readahead_pos(rac); 225 int ret; 226 size_t new_len = 0; 227 228 loff_t bytes_remaining = inode->i_size - readahead_pos(rac); 229 loff_t pages_remaining = bytes_remaining / PAGE_SIZE; 230 231 if (pages_remaining >= 1024) 232 new_len = 4194304; 233 else if (pages_remaining > readahead_count(rac)) 234 new_len = bytes_remaining; 235 236 if (new_len) 237 readahead_expand(rac, new_start, new_len); 238 239 offset = readahead_pos(rac); 240 i_pages = &rac->mapping->i_pages; 241 242 iov_iter_xarray(&iter, ITER_DEST, i_pages, offset, readahead_length(rac)); 243 244 /* read in the pages. */ 245 if ((ret = wait_for_direct_io(ORANGEFS_IO_READ, inode, 246 &offset, &iter, readahead_length(rac), 247 inode->i_size, NULL, NULL, rac->file)) < 0) 248 gossip_debug(GOSSIP_FILE_DEBUG, 249 "%s: wait_for_direct_io failed. \n", __func__); 250 else 251 ret = 0; 252 253 /* clean up. */ 254 while ((folio = readahead_folio(rac))) { 255 if (!ret) 256 folio_mark_uptodate(folio); 257 folio_unlock(folio); 258 } 259 } 260 261 static int orangefs_read_folio(struct file *file, struct folio *folio) 262 { 263 struct inode *inode = folio->mapping->host; 264 struct iov_iter iter; 265 struct bio_vec bv; 266 ssize_t ret; 267 loff_t off; /* offset of this folio in the file */ 268 269 if (folio_test_dirty(folio)) 270 orangefs_launder_folio(folio); 271 272 off = folio_pos(folio); 273 bvec_set_folio(&bv, folio, folio_size(folio), 0); 274 iov_iter_bvec(&iter, ITER_DEST, &bv, 1, folio_size(folio)); 275 276 ret = wait_for_direct_io(ORANGEFS_IO_READ, inode, &off, &iter, 277 folio_size(folio), inode->i_size, NULL, NULL, file); 278 /* this will only zero remaining unread portions of the folio data */ 279 iov_iter_zero(~0U, &iter); 280 /* takes care of potential aliasing */ 281 flush_dcache_folio(folio); 282 if (ret > 0) 283 ret = 0; 284 folio_end_read(folio, ret == 0); 285 return ret; 286 } 287 288 static int orangefs_write_begin(struct file *file, 289 struct address_space *mapping, loff_t pos, unsigned len, 290 struct folio **foliop, void **fsdata) 291 { 292 struct orangefs_write_range *wr; 293 struct folio *folio; 294 int ret; 295 296 folio = __filemap_get_folio(mapping, pos / PAGE_SIZE, FGP_WRITEBEGIN, 297 mapping_gfp_mask(mapping)); 298 if (IS_ERR(folio)) 299 return PTR_ERR(folio); 300 301 *foliop = folio; 302 303 if (folio_test_dirty(folio) && !folio_test_private(folio)) { 304 /* 305 * Should be impossible. If it happens, launder the page 306 * since we don't know what's dirty. This will WARN in 307 * orangefs_writepage_locked. 308 */ 309 ret = orangefs_launder_folio(folio); 310 if (ret) 311 return ret; 312 } 313 if (folio_test_private(folio)) { 314 struct orangefs_write_range *wr; 315 wr = folio_get_private(folio); 316 if (wr->pos + wr->len == pos && 317 uid_eq(wr->uid, current_fsuid()) && 318 gid_eq(wr->gid, current_fsgid())) { 319 wr->len += len; 320 goto okay; 321 } else { 322 wr->pos = pos; 323 wr->len = len; 324 ret = orangefs_launder_folio(folio); 325 if (ret) 326 return ret; 327 } 328 } 329 330 wr = kmalloc(sizeof *wr, GFP_KERNEL); 331 if (!wr) 332 return -ENOMEM; 333 334 wr->pos = pos; 335 wr->len = len; 336 wr->uid = current_fsuid(); 337 wr->gid = current_fsgid(); 338 folio_attach_private(folio, wr); 339 okay: 340 return 0; 341 } 342 343 static int orangefs_write_end(struct file *file, struct address_space *mapping, 344 loff_t pos, unsigned len, unsigned copied, struct folio *folio, 345 void *fsdata) 346 { 347 struct inode *inode = folio->mapping->host; 348 loff_t last_pos = pos + copied; 349 350 /* 351 * No need to use i_size_read() here, the i_size 352 * cannot change under us because we hold the i_mutex. 353 */ 354 if (last_pos > inode->i_size) 355 i_size_write(inode, last_pos); 356 357 /* zero the stale part of the folio if we did a short copy */ 358 if (!folio_test_uptodate(folio)) { 359 unsigned from = pos & (PAGE_SIZE - 1); 360 if (copied < len) { 361 folio_zero_range(folio, from + copied, len - copied); 362 } 363 /* Set fully written pages uptodate. */ 364 if (pos == folio_pos(folio) && 365 (len == PAGE_SIZE || pos + len == inode->i_size)) { 366 folio_zero_segment(folio, from + copied, PAGE_SIZE); 367 folio_mark_uptodate(folio); 368 } 369 } 370 371 folio_mark_dirty(folio); 372 folio_unlock(folio); 373 folio_put(folio); 374 375 mark_inode_dirty_sync(file_inode(file)); 376 return copied; 377 } 378 379 static void orangefs_invalidate_folio(struct folio *folio, 380 size_t offset, size_t length) 381 { 382 struct orangefs_write_range *wr = folio_get_private(folio); 383 384 if (offset == 0 && length == PAGE_SIZE) { 385 kfree(folio_detach_private(folio)); 386 return; 387 /* write range entirely within invalidate range (or equal) */ 388 } else if (folio_pos(folio) + offset <= wr->pos && 389 wr->pos + wr->len <= folio_pos(folio) + offset + length) { 390 kfree(folio_detach_private(folio)); 391 /* XXX is this right? only caller in fs */ 392 folio_cancel_dirty(folio); 393 return; 394 /* invalidate range chops off end of write range */ 395 } else if (wr->pos < folio_pos(folio) + offset && 396 wr->pos + wr->len <= folio_pos(folio) + offset + length && 397 folio_pos(folio) + offset < wr->pos + wr->len) { 398 size_t x; 399 x = wr->pos + wr->len - (folio_pos(folio) + offset); 400 WARN_ON(x > wr->len); 401 wr->len -= x; 402 wr->uid = current_fsuid(); 403 wr->gid = current_fsgid(); 404 /* invalidate range chops off beginning of write range */ 405 } else if (folio_pos(folio) + offset <= wr->pos && 406 folio_pos(folio) + offset + length < wr->pos + wr->len && 407 wr->pos < folio_pos(folio) + offset + length) { 408 size_t x; 409 x = folio_pos(folio) + offset + length - wr->pos; 410 WARN_ON(x > wr->len); 411 wr->pos += x; 412 wr->len -= x; 413 wr->uid = current_fsuid(); 414 wr->gid = current_fsgid(); 415 /* invalidate range entirely within write range (punch hole) */ 416 } else if (wr->pos < folio_pos(folio) + offset && 417 folio_pos(folio) + offset + length < wr->pos + wr->len) { 418 /* XXX what do we do here... should not WARN_ON */ 419 WARN_ON(1); 420 /* punch hole */ 421 /* 422 * should we just ignore this and write it out anyway? 423 * it hardly makes sense 424 */ 425 return; 426 /* non-overlapping ranges */ 427 } else { 428 /* WARN if they do overlap */ 429 if (!((folio_pos(folio) + offset + length <= wr->pos) ^ 430 (wr->pos + wr->len <= folio_pos(folio) + offset))) { 431 WARN_ON(1); 432 printk("invalidate range offset %llu length %zu\n", 433 folio_pos(folio) + offset, length); 434 printk("write range offset %llu length %zu\n", 435 wr->pos, wr->len); 436 } 437 return; 438 } 439 440 /* 441 * Above there are returns where wr is freed or where we WARN. 442 * Thus the following runs if wr was modified above. 443 */ 444 445 orangefs_launder_folio(folio); 446 } 447 448 static bool orangefs_release_folio(struct folio *folio, gfp_t foo) 449 { 450 return !folio_test_private(folio); 451 } 452 453 static void orangefs_free_folio(struct folio *folio) 454 { 455 kfree(folio_detach_private(folio)); 456 } 457 458 static int orangefs_launder_folio(struct folio *folio) 459 { 460 int r = 0; 461 struct writeback_control wbc = { 462 .sync_mode = WB_SYNC_ALL, 463 .nr_to_write = 0, 464 }; 465 folio_wait_writeback(folio); 466 if (folio_clear_dirty_for_io(folio)) { 467 r = orangefs_writepage_locked(folio, &wbc); 468 folio_end_writeback(folio); 469 } 470 return r; 471 } 472 473 static ssize_t orangefs_direct_IO(struct kiocb *iocb, 474 struct iov_iter *iter) 475 { 476 /* 477 * Comment from original do_readv_writev: 478 * Common entry point for read/write/readv/writev 479 * This function will dispatch it to either the direct I/O 480 * or buffered I/O path depending on the mount options and/or 481 * augmented/extended metadata attached to the file. 482 * Note: File extended attributes override any mount options. 483 */ 484 struct file *file = iocb->ki_filp; 485 loff_t pos = iocb->ki_pos; 486 enum ORANGEFS_io_type type = iov_iter_rw(iter) == WRITE ? 487 ORANGEFS_IO_WRITE : ORANGEFS_IO_READ; 488 loff_t *offset = &pos; 489 struct inode *inode = file->f_mapping->host; 490 struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode); 491 struct orangefs_khandle *handle = &orangefs_inode->refn.khandle; 492 size_t count = iov_iter_count(iter); 493 ssize_t total_count = 0; 494 ssize_t ret = -EINVAL; 495 496 gossip_debug(GOSSIP_FILE_DEBUG, 497 "%s-BEGIN(%pU): count(%d) after estimate_max_iovecs.\n", 498 __func__, 499 handle, 500 (int)count); 501 502 if (type == ORANGEFS_IO_WRITE) { 503 gossip_debug(GOSSIP_FILE_DEBUG, 504 "%s(%pU): proceeding with offset : %llu, " 505 "size %d\n", 506 __func__, 507 handle, 508 llu(*offset), 509 (int)count); 510 } 511 512 if (count == 0) { 513 ret = 0; 514 goto out; 515 } 516 517 while (iov_iter_count(iter)) { 518 size_t each_count = iov_iter_count(iter); 519 size_t amt_complete; 520 521 /* how much to transfer in this loop iteration */ 522 if (each_count > orangefs_bufmap_size_query()) 523 each_count = orangefs_bufmap_size_query(); 524 525 gossip_debug(GOSSIP_FILE_DEBUG, 526 "%s(%pU): size of each_count(%d)\n", 527 __func__, 528 handle, 529 (int)each_count); 530 gossip_debug(GOSSIP_FILE_DEBUG, 531 "%s(%pU): BEFORE wait_for_io: offset is %d\n", 532 __func__, 533 handle, 534 (int)*offset); 535 536 ret = wait_for_direct_io(type, inode, offset, iter, 537 each_count, 0, NULL, NULL, file); 538 gossip_debug(GOSSIP_FILE_DEBUG, 539 "%s(%pU): return from wait_for_io:%d\n", 540 __func__, 541 handle, 542 (int)ret); 543 544 if (ret < 0) 545 goto out; 546 547 *offset += ret; 548 total_count += ret; 549 amt_complete = ret; 550 551 gossip_debug(GOSSIP_FILE_DEBUG, 552 "%s(%pU): AFTER wait_for_io: offset is %d\n", 553 __func__, 554 handle, 555 (int)*offset); 556 557 /* 558 * if we got a short I/O operations, 559 * fall out and return what we got so far 560 */ 561 if (amt_complete < each_count) 562 break; 563 } /*end while */ 564 565 out: 566 if (total_count > 0) 567 ret = total_count; 568 if (ret > 0) { 569 if (type == ORANGEFS_IO_READ) { 570 file_accessed(file); 571 } else { 572 file_update_time(file); 573 if (*offset > i_size_read(inode)) 574 i_size_write(inode, *offset); 575 } 576 } 577 578 gossip_debug(GOSSIP_FILE_DEBUG, 579 "%s(%pU): Value(%d) returned.\n", 580 __func__, 581 handle, 582 (int)ret); 583 584 return ret; 585 } 586 587 /** ORANGEFS2 implementation of address space operations */ 588 static const struct address_space_operations orangefs_address_operations = { 589 .readahead = orangefs_readahead, 590 .read_folio = orangefs_read_folio, 591 .writepages = orangefs_writepages, 592 .dirty_folio = filemap_dirty_folio, 593 .write_begin = orangefs_write_begin, 594 .write_end = orangefs_write_end, 595 .invalidate_folio = orangefs_invalidate_folio, 596 .release_folio = orangefs_release_folio, 597 .free_folio = orangefs_free_folio, 598 .migrate_folio = filemap_migrate_folio, 599 .launder_folio = orangefs_launder_folio, 600 .direct_IO = orangefs_direct_IO, 601 }; 602 603 vm_fault_t orangefs_page_mkwrite(struct vm_fault *vmf) 604 { 605 struct folio *folio = page_folio(vmf->page); 606 struct inode *inode = file_inode(vmf->vma->vm_file); 607 struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode); 608 unsigned long *bitlock = &orangefs_inode->bitlock; 609 vm_fault_t ret; 610 struct orangefs_write_range *wr; 611 612 sb_start_pagefault(inode->i_sb); 613 614 if (wait_on_bit(bitlock, 1, TASK_KILLABLE)) { 615 ret = VM_FAULT_RETRY; 616 goto out; 617 } 618 619 folio_lock(folio); 620 if (folio_test_dirty(folio) && !folio_test_private(folio)) { 621 /* 622 * Should be impossible. If it happens, launder the folio 623 * since we don't know what's dirty. This will WARN in 624 * orangefs_writepage_locked. 625 */ 626 if (orangefs_launder_folio(folio)) { 627 ret = VM_FAULT_LOCKED|VM_FAULT_RETRY; 628 goto out; 629 } 630 } 631 if (folio_test_private(folio)) { 632 wr = folio_get_private(folio); 633 if (uid_eq(wr->uid, current_fsuid()) && 634 gid_eq(wr->gid, current_fsgid())) { 635 wr->pos = page_offset(vmf->page); 636 wr->len = PAGE_SIZE; 637 goto okay; 638 } else { 639 if (orangefs_launder_folio(folio)) { 640 ret = VM_FAULT_LOCKED|VM_FAULT_RETRY; 641 goto out; 642 } 643 } 644 } 645 wr = kmalloc(sizeof *wr, GFP_KERNEL); 646 if (!wr) { 647 ret = VM_FAULT_LOCKED|VM_FAULT_RETRY; 648 goto out; 649 } 650 wr->pos = page_offset(vmf->page); 651 wr->len = PAGE_SIZE; 652 wr->uid = current_fsuid(); 653 wr->gid = current_fsgid(); 654 folio_attach_private(folio, wr); 655 okay: 656 657 file_update_time(vmf->vma->vm_file); 658 if (folio->mapping != inode->i_mapping) { 659 folio_unlock(folio); 660 ret = VM_FAULT_LOCKED|VM_FAULT_NOPAGE; 661 goto out; 662 } 663 664 /* 665 * We mark the folio dirty already here so that when freeze is in 666 * progress, we are guaranteed that writeback during freezing will 667 * see the dirty folio and writeprotect it again. 668 */ 669 folio_mark_dirty(folio); 670 folio_wait_stable(folio); 671 ret = VM_FAULT_LOCKED; 672 out: 673 sb_end_pagefault(inode->i_sb); 674 return ret; 675 } 676 677 static int orangefs_setattr_size(struct inode *inode, struct iattr *iattr) 678 { 679 struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode); 680 struct orangefs_kernel_op_s *new_op; 681 loff_t orig_size; 682 int ret = -EINVAL; 683 684 gossip_debug(GOSSIP_INODE_DEBUG, 685 "%s: %pU: Handle is %pU | fs_id %d | size is %llu\n", 686 __func__, 687 get_khandle_from_ino(inode), 688 &orangefs_inode->refn.khandle, 689 orangefs_inode->refn.fs_id, 690 iattr->ia_size); 691 692 /* Ensure that we have a up to date size, so we know if it changed. */ 693 ret = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_SIZE); 694 if (ret == -ESTALE) 695 ret = -EIO; 696 if (ret) { 697 gossip_err("%s: orangefs_inode_getattr failed, ret:%d:.\n", 698 __func__, ret); 699 return ret; 700 } 701 orig_size = i_size_read(inode); 702 703 /* This is truncate_setsize in a different order. */ 704 truncate_pagecache(inode, iattr->ia_size); 705 i_size_write(inode, iattr->ia_size); 706 if (iattr->ia_size > orig_size) 707 pagecache_isize_extended(inode, orig_size, iattr->ia_size); 708 709 new_op = op_alloc(ORANGEFS_VFS_OP_TRUNCATE); 710 if (!new_op) 711 return -ENOMEM; 712 713 new_op->upcall.req.truncate.refn = orangefs_inode->refn; 714 new_op->upcall.req.truncate.size = (__s64) iattr->ia_size; 715 716 ret = service_operation(new_op, 717 __func__, 718 get_interruptible_flag(inode)); 719 720 /* 721 * the truncate has no downcall members to retrieve, but 722 * the status value tells us if it went through ok or not 723 */ 724 gossip_debug(GOSSIP_INODE_DEBUG, "%s: ret:%d:\n", __func__, ret); 725 726 op_release(new_op); 727 728 if (ret != 0) 729 return ret; 730 731 if (orig_size != i_size_read(inode)) 732 iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME; 733 734 return ret; 735 } 736 737 int __orangefs_setattr(struct inode *inode, struct iattr *iattr) 738 { 739 int ret; 740 741 if (iattr->ia_valid & ATTR_MODE) { 742 if (iattr->ia_mode & (S_ISVTX)) { 743 if (is_root_handle(inode)) { 744 /* 745 * allow sticky bit to be set on root (since 746 * it shows up that way by default anyhow), 747 * but don't show it to the server 748 */ 749 iattr->ia_mode -= S_ISVTX; 750 } else { 751 gossip_debug(GOSSIP_UTILS_DEBUG, 752 "User attempted to set sticky bit on non-root directory; returning EINVAL.\n"); 753 ret = -EINVAL; 754 goto out; 755 } 756 } 757 if (iattr->ia_mode & (S_ISUID)) { 758 gossip_debug(GOSSIP_UTILS_DEBUG, 759 "Attempting to set setuid bit (not supported); returning EINVAL.\n"); 760 ret = -EINVAL; 761 goto out; 762 } 763 } 764 765 if (iattr->ia_valid & ATTR_SIZE) { 766 ret = orangefs_setattr_size(inode, iattr); 767 if (ret) 768 goto out; 769 } 770 771 again: 772 spin_lock(&inode->i_lock); 773 if (ORANGEFS_I(inode)->attr_valid) { 774 if (uid_eq(ORANGEFS_I(inode)->attr_uid, current_fsuid()) && 775 gid_eq(ORANGEFS_I(inode)->attr_gid, current_fsgid())) { 776 ORANGEFS_I(inode)->attr_valid = iattr->ia_valid; 777 } else { 778 spin_unlock(&inode->i_lock); 779 write_inode_now(inode, 1); 780 goto again; 781 } 782 } else { 783 ORANGEFS_I(inode)->attr_valid = iattr->ia_valid; 784 ORANGEFS_I(inode)->attr_uid = current_fsuid(); 785 ORANGEFS_I(inode)->attr_gid = current_fsgid(); 786 } 787 setattr_copy(&nop_mnt_idmap, inode, iattr); 788 spin_unlock(&inode->i_lock); 789 mark_inode_dirty(inode); 790 791 ret = 0; 792 out: 793 return ret; 794 } 795 796 int __orangefs_setattr_mode(struct dentry *dentry, struct iattr *iattr) 797 { 798 int ret; 799 struct inode *inode = d_inode(dentry); 800 801 ret = __orangefs_setattr(inode, iattr); 802 /* change mode on a file that has ACLs */ 803 if (!ret && (iattr->ia_valid & ATTR_MODE)) 804 ret = posix_acl_chmod(&nop_mnt_idmap, dentry, inode->i_mode); 805 return ret; 806 } 807 808 /* 809 * Change attributes of an object referenced by dentry. 810 */ 811 int orangefs_setattr(struct mnt_idmap *idmap, struct dentry *dentry, 812 struct iattr *iattr) 813 { 814 int ret; 815 gossip_debug(GOSSIP_INODE_DEBUG, "__orangefs_setattr: called on %pd\n", 816 dentry); 817 ret = setattr_prepare(&nop_mnt_idmap, dentry, iattr); 818 if (ret) 819 goto out; 820 ret = __orangefs_setattr_mode(dentry, iattr); 821 sync_inode_metadata(d_inode(dentry), 1); 822 out: 823 gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_setattr: returning %d\n", 824 ret); 825 return ret; 826 } 827 828 /* 829 * Obtain attributes of an object given a dentry 830 */ 831 int orangefs_getattr(struct mnt_idmap *idmap, const struct path *path, 832 struct kstat *stat, u32 request_mask, unsigned int flags) 833 { 834 int ret; 835 struct inode *inode = path->dentry->d_inode; 836 837 gossip_debug(GOSSIP_INODE_DEBUG, 838 "orangefs_getattr: called on %pd mask %u\n", 839 path->dentry, request_mask); 840 841 ret = orangefs_inode_getattr(inode, 842 request_mask & STATX_SIZE ? ORANGEFS_GETATTR_SIZE : 0); 843 if (ret == 0) { 844 generic_fillattr(&nop_mnt_idmap, request_mask, inode, stat); 845 846 /* override block size reported to stat */ 847 if (!(request_mask & STATX_SIZE)) 848 stat->result_mask &= ~STATX_SIZE; 849 850 generic_fill_statx_attr(inode, stat); 851 } 852 return ret; 853 } 854 855 int orangefs_permission(struct mnt_idmap *idmap, 856 struct inode *inode, int mask) 857 { 858 int ret; 859 860 if (mask & MAY_NOT_BLOCK) 861 return -ECHILD; 862 863 gossip_debug(GOSSIP_INODE_DEBUG, "%s: refreshing\n", __func__); 864 865 /* Make sure the permission (and other common attrs) are up to date. */ 866 ret = orangefs_inode_getattr(inode, 0); 867 if (ret < 0) 868 return ret; 869 870 return generic_permission(&nop_mnt_idmap, inode, mask); 871 } 872 873 int orangefs_update_time(struct inode *inode, int flags) 874 { 875 struct iattr iattr; 876 877 gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_update_time: %pU\n", 878 get_khandle_from_ino(inode)); 879 flags = generic_update_time(inode, flags); 880 memset(&iattr, 0, sizeof iattr); 881 if (flags & S_ATIME) 882 iattr.ia_valid |= ATTR_ATIME; 883 if (flags & S_CTIME) 884 iattr.ia_valid |= ATTR_CTIME; 885 if (flags & S_MTIME) 886 iattr.ia_valid |= ATTR_MTIME; 887 return __orangefs_setattr(inode, &iattr); 888 } 889 890 static int orangefs_fileattr_get(struct dentry *dentry, struct fileattr *fa) 891 { 892 u64 val = 0; 893 int ret; 894 895 gossip_debug(GOSSIP_FILE_DEBUG, "%s: called on %pd\n", __func__, 896 dentry); 897 898 ret = orangefs_inode_getxattr(d_inode(dentry), 899 "user.pvfs2.meta_hint", 900 &val, sizeof(val)); 901 if (ret < 0 && ret != -ENODATA) 902 return ret; 903 904 gossip_debug(GOSSIP_FILE_DEBUG, "%s: flags=%u\n", __func__, (u32) val); 905 906 fileattr_fill_flags(fa, val); 907 return 0; 908 } 909 910 static int orangefs_fileattr_set(struct mnt_idmap *idmap, 911 struct dentry *dentry, struct fileattr *fa) 912 { 913 u64 val = 0; 914 915 gossip_debug(GOSSIP_FILE_DEBUG, "%s: called on %pd\n", __func__, 916 dentry); 917 /* 918 * ORANGEFS_MIRROR_FL is set internally when the mirroring mode is 919 * turned on for a file. The user is not allowed to turn on this bit, 920 * but the bit is present if the user first gets the flags and then 921 * updates the flags with some new settings. So, we ignore it in the 922 * following edit. bligon. 923 */ 924 if (fileattr_has_fsx(fa) || 925 (fa->flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | FS_NOATIME_FL | ORANGEFS_MIRROR_FL))) { 926 gossip_err("%s: only supports setting one of FS_IMMUTABLE_FL|FS_APPEND_FL|FS_NOATIME_FL\n", 927 __func__); 928 return -EOPNOTSUPP; 929 } 930 val = fa->flags; 931 gossip_debug(GOSSIP_FILE_DEBUG, "%s: flags=%u\n", __func__, (u32) val); 932 return orangefs_inode_setxattr(d_inode(dentry), 933 "user.pvfs2.meta_hint", 934 &val, sizeof(val), 0); 935 } 936 937 /* ORANGEFS2 implementation of VFS inode operations for files */ 938 static const struct inode_operations orangefs_file_inode_operations = { 939 .get_inode_acl = orangefs_get_acl, 940 .set_acl = orangefs_set_acl, 941 .setattr = orangefs_setattr, 942 .getattr = orangefs_getattr, 943 .listxattr = orangefs_listxattr, 944 .permission = orangefs_permission, 945 .update_time = orangefs_update_time, 946 .fileattr_get = orangefs_fileattr_get, 947 .fileattr_set = orangefs_fileattr_set, 948 }; 949 950 static int orangefs_init_iops(struct inode *inode) 951 { 952 inode->i_mapping->a_ops = &orangefs_address_operations; 953 954 switch (inode->i_mode & S_IFMT) { 955 case S_IFREG: 956 inode->i_op = &orangefs_file_inode_operations; 957 inode->i_fop = &orangefs_file_operations; 958 break; 959 case S_IFLNK: 960 inode->i_op = &orangefs_symlink_inode_operations; 961 break; 962 case S_IFDIR: 963 inode->i_op = &orangefs_dir_inode_operations; 964 inode->i_fop = &orangefs_dir_operations; 965 break; 966 default: 967 gossip_debug(GOSSIP_INODE_DEBUG, 968 "%s: unsupported mode\n", 969 __func__); 970 return -EINVAL; 971 } 972 973 return 0; 974 } 975 976 /* 977 * Given an ORANGEFS object identifier (fsid, handle), convert it into 978 * a ino_t type that will be used as a hash-index from where the handle will 979 * be searched for in the VFS hash table of inodes. 980 */ 981 static inline ino_t orangefs_handle_hash(struct orangefs_object_kref *ref) 982 { 983 if (!ref) 984 return 0; 985 return orangefs_khandle_to_ino(&(ref->khandle)); 986 } 987 988 /* 989 * Called to set up an inode from iget5_locked. 990 */ 991 static int orangefs_set_inode(struct inode *inode, void *data) 992 { 993 struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data; 994 ORANGEFS_I(inode)->refn.fs_id = ref->fs_id; 995 ORANGEFS_I(inode)->refn.khandle = ref->khandle; 996 ORANGEFS_I(inode)->attr_valid = 0; 997 hash_init(ORANGEFS_I(inode)->xattr_cache); 998 ORANGEFS_I(inode)->mapping_time = jiffies - 1; 999 ORANGEFS_I(inode)->bitlock = 0; 1000 return 0; 1001 } 1002 1003 /* 1004 * Called to determine if handles match. 1005 */ 1006 static int orangefs_test_inode(struct inode *inode, void *data) 1007 { 1008 struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data; 1009 struct orangefs_inode_s *orangefs_inode = NULL; 1010 1011 orangefs_inode = ORANGEFS_I(inode); 1012 /* test handles and fs_ids... */ 1013 return (!ORANGEFS_khandle_cmp(&(orangefs_inode->refn.khandle), 1014 &(ref->khandle)) && 1015 orangefs_inode->refn.fs_id == ref->fs_id); 1016 } 1017 1018 /* 1019 * Front-end to lookup the inode-cache maintained by the VFS using the ORANGEFS 1020 * file handle. 1021 * 1022 * @sb: the file system super block instance. 1023 * @ref: The ORANGEFS object for which we are trying to locate an inode. 1024 */ 1025 struct inode *orangefs_iget(struct super_block *sb, 1026 struct orangefs_object_kref *ref) 1027 { 1028 struct inode *inode = NULL; 1029 unsigned long hash; 1030 int error; 1031 1032 hash = orangefs_handle_hash(ref); 1033 inode = iget5_locked(sb, 1034 hash, 1035 orangefs_test_inode, 1036 orangefs_set_inode, 1037 ref); 1038 1039 if (!inode) 1040 return ERR_PTR(-ENOMEM); 1041 1042 if (!(inode->i_state & I_NEW)) 1043 return inode; 1044 1045 error = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_NEW); 1046 if (error) { 1047 iget_failed(inode); 1048 return ERR_PTR(error); 1049 } 1050 1051 inode->i_ino = hash; /* needed for stat etc */ 1052 orangefs_init_iops(inode); 1053 unlock_new_inode(inode); 1054 1055 gossip_debug(GOSSIP_INODE_DEBUG, 1056 "iget handle %pU, fsid %d hash %ld i_ino %lu\n", 1057 &ref->khandle, 1058 ref->fs_id, 1059 hash, 1060 inode->i_ino); 1061 1062 return inode; 1063 } 1064 1065 /* 1066 * Allocate an inode for a newly created file and insert it into the inode hash. 1067 */ 1068 struct inode *orangefs_new_inode(struct super_block *sb, struct inode *dir, 1069 umode_t mode, dev_t dev, struct orangefs_object_kref *ref) 1070 { 1071 struct posix_acl *acl = NULL, *default_acl = NULL; 1072 unsigned long hash = orangefs_handle_hash(ref); 1073 struct inode *inode; 1074 int error; 1075 1076 gossip_debug(GOSSIP_INODE_DEBUG, 1077 "%s:(sb is %p | MAJOR(dev)=%u | MINOR(dev)=%u mode=%o)\n", 1078 __func__, 1079 sb, 1080 MAJOR(dev), 1081 MINOR(dev), 1082 mode); 1083 1084 inode = new_inode(sb); 1085 if (!inode) 1086 return ERR_PTR(-ENOMEM); 1087 1088 error = posix_acl_create(dir, &mode, &default_acl, &acl); 1089 if (error) 1090 goto out_iput; 1091 1092 orangefs_set_inode(inode, ref); 1093 inode->i_ino = hash; /* needed for stat etc */ 1094 1095 error = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_NEW); 1096 if (error) 1097 goto out_iput; 1098 1099 orangefs_init_iops(inode); 1100 inode->i_rdev = dev; 1101 1102 if (default_acl) { 1103 error = __orangefs_set_acl(inode, default_acl, 1104 ACL_TYPE_DEFAULT); 1105 if (error) 1106 goto out_iput; 1107 } 1108 1109 if (acl) { 1110 error = __orangefs_set_acl(inode, acl, ACL_TYPE_ACCESS); 1111 if (error) 1112 goto out_iput; 1113 } 1114 1115 error = insert_inode_locked4(inode, hash, orangefs_test_inode, ref); 1116 if (error < 0) 1117 goto out_iput; 1118 1119 gossip_debug(GOSSIP_INODE_DEBUG, 1120 "Initializing ACL's for inode %pU\n", 1121 get_khandle_from_ino(inode)); 1122 if (mode != inode->i_mode) { 1123 struct iattr iattr = { 1124 .ia_mode = mode, 1125 .ia_valid = ATTR_MODE, 1126 }; 1127 inode->i_mode = mode; 1128 __orangefs_setattr(inode, &iattr); 1129 __posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode); 1130 } 1131 posix_acl_release(acl); 1132 posix_acl_release(default_acl); 1133 return inode; 1134 1135 out_iput: 1136 iput(inode); 1137 posix_acl_release(acl); 1138 posix_acl_release(default_acl); 1139 return ERR_PTR(error); 1140 } 1141