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(const struct kiocb *iocb, 289 struct address_space *mapping, loff_t pos, 290 unsigned len, struct folio **foliop, 291 void **fsdata) 292 { 293 struct orangefs_write_range *wr; 294 struct folio *folio; 295 int ret; 296 297 folio = __filemap_get_folio(mapping, pos / PAGE_SIZE, FGP_WRITEBEGIN, 298 mapping_gfp_mask(mapping)); 299 if (IS_ERR(folio)) 300 return PTR_ERR(folio); 301 302 *foliop = folio; 303 304 if (folio_test_dirty(folio) && !folio_test_private(folio)) { 305 /* 306 * Should be impossible. If it happens, launder the page 307 * since we don't know what's dirty. This will WARN in 308 * orangefs_writepage_locked. 309 */ 310 ret = orangefs_launder_folio(folio); 311 if (ret) 312 return ret; 313 } 314 if (folio_test_private(folio)) { 315 struct orangefs_write_range *wr; 316 wr = folio_get_private(folio); 317 if (wr->pos + wr->len == pos && 318 uid_eq(wr->uid, current_fsuid()) && 319 gid_eq(wr->gid, current_fsgid())) { 320 wr->len += len; 321 goto okay; 322 } else { 323 wr->pos = pos; 324 wr->len = len; 325 ret = orangefs_launder_folio(folio); 326 if (ret) 327 return ret; 328 } 329 } 330 331 wr = kmalloc(sizeof *wr, GFP_KERNEL); 332 if (!wr) 333 return -ENOMEM; 334 335 wr->pos = pos; 336 wr->len = len; 337 wr->uid = current_fsuid(); 338 wr->gid = current_fsgid(); 339 folio_attach_private(folio, wr); 340 okay: 341 return 0; 342 } 343 344 static int orangefs_write_end(const struct kiocb *iocb, 345 struct address_space *mapping, 346 loff_t pos, unsigned len, unsigned copied, 347 struct folio *folio, void *fsdata) 348 { 349 struct inode *inode = folio->mapping->host; 350 loff_t last_pos = pos + copied; 351 352 /* 353 * No need to use i_size_read() here, the i_size 354 * cannot change under us because we hold the i_mutex. 355 */ 356 if (last_pos > inode->i_size) 357 i_size_write(inode, last_pos); 358 359 /* zero the stale part of the folio if we did a short copy */ 360 if (!folio_test_uptodate(folio)) { 361 unsigned from = pos & (PAGE_SIZE - 1); 362 if (copied < len) { 363 folio_zero_range(folio, from + copied, len - copied); 364 } 365 /* Set fully written pages uptodate. */ 366 if (pos == folio_pos(folio) && 367 (len == PAGE_SIZE || pos + len == inode->i_size)) { 368 folio_zero_segment(folio, from + copied, PAGE_SIZE); 369 folio_mark_uptodate(folio); 370 } 371 } 372 373 folio_mark_dirty(folio); 374 folio_unlock(folio); 375 folio_put(folio); 376 377 mark_inode_dirty_sync(file_inode(iocb->ki_filp)); 378 return copied; 379 } 380 381 static void orangefs_invalidate_folio(struct folio *folio, 382 size_t offset, size_t length) 383 { 384 struct orangefs_write_range *wr = folio_get_private(folio); 385 386 if (offset == 0 && length == PAGE_SIZE) { 387 kfree(folio_detach_private(folio)); 388 return; 389 /* write range entirely within invalidate range (or equal) */ 390 } else if (folio_pos(folio) + offset <= wr->pos && 391 wr->pos + wr->len <= folio_pos(folio) + offset + length) { 392 kfree(folio_detach_private(folio)); 393 /* XXX is this right? only caller in fs */ 394 folio_cancel_dirty(folio); 395 return; 396 /* invalidate range chops off end of write range */ 397 } else if (wr->pos < folio_pos(folio) + offset && 398 wr->pos + wr->len <= folio_pos(folio) + offset + length && 399 folio_pos(folio) + offset < wr->pos + wr->len) { 400 size_t x; 401 x = wr->pos + wr->len - (folio_pos(folio) + offset); 402 WARN_ON(x > wr->len); 403 wr->len -= x; 404 wr->uid = current_fsuid(); 405 wr->gid = current_fsgid(); 406 /* invalidate range chops off beginning of write range */ 407 } else if (folio_pos(folio) + offset <= wr->pos && 408 folio_pos(folio) + offset + length < wr->pos + wr->len && 409 wr->pos < folio_pos(folio) + offset + length) { 410 size_t x; 411 x = folio_pos(folio) + offset + length - wr->pos; 412 WARN_ON(x > wr->len); 413 wr->pos += x; 414 wr->len -= x; 415 wr->uid = current_fsuid(); 416 wr->gid = current_fsgid(); 417 /* invalidate range entirely within write range (punch hole) */ 418 } else if (wr->pos < folio_pos(folio) + offset && 419 folio_pos(folio) + offset + length < wr->pos + wr->len) { 420 /* XXX what do we do here... should not WARN_ON */ 421 WARN_ON(1); 422 /* punch hole */ 423 /* 424 * should we just ignore this and write it out anyway? 425 * it hardly makes sense 426 */ 427 return; 428 /* non-overlapping ranges */ 429 } else { 430 /* WARN if they do overlap */ 431 if (!((folio_pos(folio) + offset + length <= wr->pos) ^ 432 (wr->pos + wr->len <= folio_pos(folio) + offset))) { 433 WARN_ON(1); 434 printk("invalidate range offset %llu length %zu\n", 435 folio_pos(folio) + offset, length); 436 printk("write range offset %llu length %zu\n", 437 wr->pos, wr->len); 438 } 439 return; 440 } 441 442 /* 443 * Above there are returns where wr is freed or where we WARN. 444 * Thus the following runs if wr was modified above. 445 */ 446 447 orangefs_launder_folio(folio); 448 } 449 450 static bool orangefs_release_folio(struct folio *folio, gfp_t foo) 451 { 452 return !folio_test_private(folio); 453 } 454 455 static void orangefs_free_folio(struct folio *folio) 456 { 457 kfree(folio_detach_private(folio)); 458 } 459 460 static int orangefs_launder_folio(struct folio *folio) 461 { 462 int r = 0; 463 struct writeback_control wbc = { 464 .sync_mode = WB_SYNC_ALL, 465 .nr_to_write = 0, 466 }; 467 folio_wait_writeback(folio); 468 if (folio_clear_dirty_for_io(folio)) { 469 r = orangefs_writepage_locked(folio, &wbc); 470 folio_end_writeback(folio); 471 } 472 return r; 473 } 474 475 static ssize_t orangefs_direct_IO(struct kiocb *iocb, 476 struct iov_iter *iter) 477 { 478 /* 479 * Comment from original do_readv_writev: 480 * Common entry point for read/write/readv/writev 481 * This function will dispatch it to either the direct I/O 482 * or buffered I/O path depending on the mount options and/or 483 * augmented/extended metadata attached to the file. 484 * Note: File extended attributes override any mount options. 485 */ 486 struct file *file = iocb->ki_filp; 487 loff_t pos = iocb->ki_pos; 488 enum ORANGEFS_io_type type = iov_iter_rw(iter) == WRITE ? 489 ORANGEFS_IO_WRITE : ORANGEFS_IO_READ; 490 loff_t *offset = &pos; 491 struct inode *inode = file->f_mapping->host; 492 struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode); 493 struct orangefs_khandle *handle = &orangefs_inode->refn.khandle; 494 size_t count = iov_iter_count(iter); 495 ssize_t total_count = 0; 496 ssize_t ret = -EINVAL; 497 498 gossip_debug(GOSSIP_FILE_DEBUG, 499 "%s-BEGIN(%pU): count(%d) after estimate_max_iovecs.\n", 500 __func__, 501 handle, 502 (int)count); 503 504 if (type == ORANGEFS_IO_WRITE) { 505 gossip_debug(GOSSIP_FILE_DEBUG, 506 "%s(%pU): proceeding with offset : %llu, " 507 "size %d\n", 508 __func__, 509 handle, 510 llu(*offset), 511 (int)count); 512 } 513 514 if (count == 0) { 515 ret = 0; 516 goto out; 517 } 518 519 while (iov_iter_count(iter)) { 520 size_t each_count = iov_iter_count(iter); 521 size_t amt_complete; 522 523 /* how much to transfer in this loop iteration */ 524 if (each_count > orangefs_bufmap_size_query()) 525 each_count = orangefs_bufmap_size_query(); 526 527 gossip_debug(GOSSIP_FILE_DEBUG, 528 "%s(%pU): size of each_count(%d)\n", 529 __func__, 530 handle, 531 (int)each_count); 532 gossip_debug(GOSSIP_FILE_DEBUG, 533 "%s(%pU): BEFORE wait_for_io: offset is %d\n", 534 __func__, 535 handle, 536 (int)*offset); 537 538 ret = wait_for_direct_io(type, inode, offset, iter, 539 each_count, 0, NULL, NULL, file); 540 gossip_debug(GOSSIP_FILE_DEBUG, 541 "%s(%pU): return from wait_for_io:%d\n", 542 __func__, 543 handle, 544 (int)ret); 545 546 if (ret < 0) 547 goto out; 548 549 *offset += ret; 550 total_count += ret; 551 amt_complete = ret; 552 553 gossip_debug(GOSSIP_FILE_DEBUG, 554 "%s(%pU): AFTER wait_for_io: offset is %d\n", 555 __func__, 556 handle, 557 (int)*offset); 558 559 /* 560 * if we got a short I/O operations, 561 * fall out and return what we got so far 562 */ 563 if (amt_complete < each_count) 564 break; 565 } /*end while */ 566 567 out: 568 if (total_count > 0) 569 ret = total_count; 570 if (ret > 0) { 571 if (type == ORANGEFS_IO_READ) { 572 file_accessed(file); 573 } else { 574 file_update_time(file); 575 if (*offset > i_size_read(inode)) 576 i_size_write(inode, *offset); 577 } 578 } 579 580 gossip_debug(GOSSIP_FILE_DEBUG, 581 "%s(%pU): Value(%d) returned.\n", 582 __func__, 583 handle, 584 (int)ret); 585 586 return ret; 587 } 588 589 /** ORANGEFS2 implementation of address space operations */ 590 static const struct address_space_operations orangefs_address_operations = { 591 .readahead = orangefs_readahead, 592 .read_folio = orangefs_read_folio, 593 .writepages = orangefs_writepages, 594 .dirty_folio = filemap_dirty_folio, 595 .write_begin = orangefs_write_begin, 596 .write_end = orangefs_write_end, 597 .invalidate_folio = orangefs_invalidate_folio, 598 .release_folio = orangefs_release_folio, 599 .free_folio = orangefs_free_folio, 600 .migrate_folio = filemap_migrate_folio, 601 .launder_folio = orangefs_launder_folio, 602 .direct_IO = orangefs_direct_IO, 603 }; 604 605 vm_fault_t orangefs_page_mkwrite(struct vm_fault *vmf) 606 { 607 struct folio *folio = page_folio(vmf->page); 608 struct inode *inode = file_inode(vmf->vma->vm_file); 609 struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode); 610 unsigned long *bitlock = &orangefs_inode->bitlock; 611 vm_fault_t ret; 612 struct orangefs_write_range *wr; 613 614 sb_start_pagefault(inode->i_sb); 615 616 if (wait_on_bit(bitlock, 1, TASK_KILLABLE)) { 617 ret = VM_FAULT_RETRY; 618 goto out; 619 } 620 621 folio_lock(folio); 622 if (folio_test_dirty(folio) && !folio_test_private(folio)) { 623 /* 624 * Should be impossible. If it happens, launder the folio 625 * since we don't know what's dirty. This will WARN in 626 * orangefs_writepage_locked. 627 */ 628 if (orangefs_launder_folio(folio)) { 629 ret = VM_FAULT_LOCKED|VM_FAULT_RETRY; 630 goto out; 631 } 632 } 633 if (folio_test_private(folio)) { 634 wr = folio_get_private(folio); 635 if (uid_eq(wr->uid, current_fsuid()) && 636 gid_eq(wr->gid, current_fsgid())) { 637 wr->pos = page_offset(vmf->page); 638 wr->len = PAGE_SIZE; 639 goto okay; 640 } else { 641 if (orangefs_launder_folio(folio)) { 642 ret = VM_FAULT_LOCKED|VM_FAULT_RETRY; 643 goto out; 644 } 645 } 646 } 647 wr = kmalloc(sizeof *wr, GFP_KERNEL); 648 if (!wr) { 649 ret = VM_FAULT_LOCKED|VM_FAULT_RETRY; 650 goto out; 651 } 652 wr->pos = page_offset(vmf->page); 653 wr->len = PAGE_SIZE; 654 wr->uid = current_fsuid(); 655 wr->gid = current_fsgid(); 656 folio_attach_private(folio, wr); 657 okay: 658 659 file_update_time(vmf->vma->vm_file); 660 if (folio->mapping != inode->i_mapping) { 661 folio_unlock(folio); 662 ret = VM_FAULT_LOCKED|VM_FAULT_NOPAGE; 663 goto out; 664 } 665 666 /* 667 * We mark the folio dirty already here so that when freeze is in 668 * progress, we are guaranteed that writeback during freezing will 669 * see the dirty folio and writeprotect it again. 670 */ 671 folio_mark_dirty(folio); 672 folio_wait_stable(folio); 673 ret = VM_FAULT_LOCKED; 674 out: 675 sb_end_pagefault(inode->i_sb); 676 return ret; 677 } 678 679 static int orangefs_setattr_size(struct inode *inode, struct iattr *iattr) 680 { 681 struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode); 682 struct orangefs_kernel_op_s *new_op; 683 loff_t orig_size; 684 int ret = -EINVAL; 685 686 gossip_debug(GOSSIP_INODE_DEBUG, 687 "%s: %pU: Handle is %pU | fs_id %d | size is %llu\n", 688 __func__, 689 get_khandle_from_ino(inode), 690 &orangefs_inode->refn.khandle, 691 orangefs_inode->refn.fs_id, 692 iattr->ia_size); 693 694 /* Ensure that we have a up to date size, so we know if it changed. */ 695 ret = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_SIZE); 696 if (ret == -ESTALE) 697 ret = -EIO; 698 if (ret) { 699 gossip_err("%s: orangefs_inode_getattr failed, ret:%d:.\n", 700 __func__, ret); 701 return ret; 702 } 703 orig_size = i_size_read(inode); 704 705 /* This is truncate_setsize in a different order. */ 706 truncate_pagecache(inode, iattr->ia_size); 707 i_size_write(inode, iattr->ia_size); 708 if (iattr->ia_size > orig_size) 709 pagecache_isize_extended(inode, orig_size, iattr->ia_size); 710 711 new_op = op_alloc(ORANGEFS_VFS_OP_TRUNCATE); 712 if (!new_op) 713 return -ENOMEM; 714 715 new_op->upcall.req.truncate.refn = orangefs_inode->refn; 716 new_op->upcall.req.truncate.size = (__s64) iattr->ia_size; 717 718 ret = service_operation(new_op, 719 __func__, 720 get_interruptible_flag(inode)); 721 722 /* 723 * the truncate has no downcall members to retrieve, but 724 * the status value tells us if it went through ok or not 725 */ 726 gossip_debug(GOSSIP_INODE_DEBUG, "%s: ret:%d:\n", __func__, ret); 727 728 op_release(new_op); 729 730 if (ret != 0) 731 return ret; 732 733 if (orig_size != i_size_read(inode)) 734 iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME; 735 736 return ret; 737 } 738 739 int __orangefs_setattr(struct inode *inode, struct iattr *iattr) 740 { 741 int ret; 742 743 if (iattr->ia_valid & ATTR_MODE) { 744 if (iattr->ia_mode & (S_ISVTX)) { 745 if (is_root_handle(inode)) { 746 /* 747 * allow sticky bit to be set on root (since 748 * it shows up that way by default anyhow), 749 * but don't show it to the server 750 */ 751 iattr->ia_mode -= S_ISVTX; 752 } else { 753 gossip_debug(GOSSIP_UTILS_DEBUG, 754 "User attempted to set sticky bit on non-root directory; returning EINVAL.\n"); 755 ret = -EINVAL; 756 goto out; 757 } 758 } 759 if (iattr->ia_mode & (S_ISUID)) { 760 gossip_debug(GOSSIP_UTILS_DEBUG, 761 "Attempting to set setuid bit (not supported); returning EINVAL.\n"); 762 ret = -EINVAL; 763 goto out; 764 } 765 } 766 767 if (iattr->ia_valid & ATTR_SIZE) { 768 ret = orangefs_setattr_size(inode, iattr); 769 if (ret) 770 goto out; 771 } 772 773 again: 774 spin_lock(&inode->i_lock); 775 if (ORANGEFS_I(inode)->attr_valid) { 776 if (uid_eq(ORANGEFS_I(inode)->attr_uid, current_fsuid()) && 777 gid_eq(ORANGEFS_I(inode)->attr_gid, current_fsgid())) { 778 ORANGEFS_I(inode)->attr_valid = iattr->ia_valid; 779 } else { 780 spin_unlock(&inode->i_lock); 781 write_inode_now(inode, 1); 782 goto again; 783 } 784 } else { 785 ORANGEFS_I(inode)->attr_valid = iattr->ia_valid; 786 ORANGEFS_I(inode)->attr_uid = current_fsuid(); 787 ORANGEFS_I(inode)->attr_gid = current_fsgid(); 788 } 789 setattr_copy(&nop_mnt_idmap, inode, iattr); 790 spin_unlock(&inode->i_lock); 791 mark_inode_dirty(inode); 792 793 ret = 0; 794 out: 795 return ret; 796 } 797 798 int __orangefs_setattr_mode(struct dentry *dentry, struct iattr *iattr) 799 { 800 int ret; 801 struct inode *inode = d_inode(dentry); 802 803 ret = __orangefs_setattr(inode, iattr); 804 /* change mode on a file that has ACLs */ 805 if (!ret && (iattr->ia_valid & ATTR_MODE)) 806 ret = posix_acl_chmod(&nop_mnt_idmap, dentry, inode->i_mode); 807 return ret; 808 } 809 810 /* 811 * Change attributes of an object referenced by dentry. 812 */ 813 int orangefs_setattr(struct mnt_idmap *idmap, struct dentry *dentry, 814 struct iattr *iattr) 815 { 816 int ret; 817 gossip_debug(GOSSIP_INODE_DEBUG, "__orangefs_setattr: called on %pd\n", 818 dentry); 819 ret = setattr_prepare(&nop_mnt_idmap, dentry, iattr); 820 if (ret) 821 goto out; 822 ret = __orangefs_setattr_mode(dentry, iattr); 823 sync_inode_metadata(d_inode(dentry), 1); 824 out: 825 gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_setattr: returning %d\n", 826 ret); 827 return ret; 828 } 829 830 /* 831 * Obtain attributes of an object given a dentry 832 */ 833 int orangefs_getattr(struct mnt_idmap *idmap, const struct path *path, 834 struct kstat *stat, u32 request_mask, unsigned int flags) 835 { 836 int ret; 837 struct inode *inode = path->dentry->d_inode; 838 839 gossip_debug(GOSSIP_INODE_DEBUG, 840 "orangefs_getattr: called on %pd mask %u\n", 841 path->dentry, request_mask); 842 843 ret = orangefs_inode_getattr(inode, 844 request_mask & STATX_SIZE ? ORANGEFS_GETATTR_SIZE : 0); 845 if (ret == 0) { 846 generic_fillattr(&nop_mnt_idmap, request_mask, inode, stat); 847 848 /* override block size reported to stat */ 849 if (!(request_mask & STATX_SIZE)) 850 stat->result_mask &= ~STATX_SIZE; 851 852 generic_fill_statx_attr(inode, stat); 853 } 854 return ret; 855 } 856 857 int orangefs_permission(struct mnt_idmap *idmap, 858 struct inode *inode, int mask) 859 { 860 int ret; 861 862 if (mask & MAY_NOT_BLOCK) 863 return -ECHILD; 864 865 gossip_debug(GOSSIP_INODE_DEBUG, "%s: refreshing\n", __func__); 866 867 /* Make sure the permission (and other common attrs) are up to date. */ 868 ret = orangefs_inode_getattr(inode, 0); 869 if (ret < 0) 870 return ret; 871 872 return generic_permission(&nop_mnt_idmap, inode, mask); 873 } 874 875 int orangefs_update_time(struct inode *inode, int flags) 876 { 877 struct iattr iattr; 878 879 gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_update_time: %pU\n", 880 get_khandle_from_ino(inode)); 881 flags = generic_update_time(inode, flags); 882 memset(&iattr, 0, sizeof iattr); 883 if (flags & S_ATIME) 884 iattr.ia_valid |= ATTR_ATIME; 885 if (flags & S_CTIME) 886 iattr.ia_valid |= ATTR_CTIME; 887 if (flags & S_MTIME) 888 iattr.ia_valid |= ATTR_MTIME; 889 return __orangefs_setattr(inode, &iattr); 890 } 891 892 static int orangefs_fileattr_get(struct dentry *dentry, struct file_kattr *fa) 893 { 894 u64 val = 0; 895 int ret; 896 897 gossip_debug(GOSSIP_FILE_DEBUG, "%s: called on %pd\n", __func__, 898 dentry); 899 900 ret = orangefs_inode_getxattr(d_inode(dentry), 901 "user.pvfs2.meta_hint", 902 &val, sizeof(val)); 903 if (ret < 0 && ret != -ENODATA) 904 return ret; 905 906 gossip_debug(GOSSIP_FILE_DEBUG, "%s: flags=%u\n", __func__, (u32) val); 907 908 fileattr_fill_flags(fa, val); 909 return 0; 910 } 911 912 static int orangefs_fileattr_set(struct mnt_idmap *idmap, 913 struct dentry *dentry, struct file_kattr *fa) 914 { 915 u64 val = 0; 916 917 gossip_debug(GOSSIP_FILE_DEBUG, "%s: called on %pd\n", __func__, 918 dentry); 919 /* 920 * ORANGEFS_MIRROR_FL is set internally when the mirroring mode is 921 * turned on for a file. The user is not allowed to turn on this bit, 922 * but the bit is present if the user first gets the flags and then 923 * updates the flags with some new settings. So, we ignore it in the 924 * following edit. bligon. 925 */ 926 if (fileattr_has_fsx(fa) || 927 (fa->flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | FS_NOATIME_FL | ORANGEFS_MIRROR_FL))) { 928 gossip_err("%s: only supports setting one of FS_IMMUTABLE_FL|FS_APPEND_FL|FS_NOATIME_FL\n", 929 __func__); 930 return -EOPNOTSUPP; 931 } 932 val = fa->flags; 933 gossip_debug(GOSSIP_FILE_DEBUG, "%s: flags=%u\n", __func__, (u32) val); 934 return orangefs_inode_setxattr(d_inode(dentry), 935 "user.pvfs2.meta_hint", 936 &val, sizeof(val), 0); 937 } 938 939 /* ORANGEFS2 implementation of VFS inode operations for files */ 940 static const struct inode_operations orangefs_file_inode_operations = { 941 .get_inode_acl = orangefs_get_acl, 942 .set_acl = orangefs_set_acl, 943 .setattr = orangefs_setattr, 944 .getattr = orangefs_getattr, 945 .listxattr = orangefs_listxattr, 946 .permission = orangefs_permission, 947 .update_time = orangefs_update_time, 948 .fileattr_get = orangefs_fileattr_get, 949 .fileattr_set = orangefs_fileattr_set, 950 }; 951 952 static int orangefs_init_iops(struct inode *inode) 953 { 954 inode->i_mapping->a_ops = &orangefs_address_operations; 955 956 switch (inode->i_mode & S_IFMT) { 957 case S_IFREG: 958 inode->i_op = &orangefs_file_inode_operations; 959 inode->i_fop = &orangefs_file_operations; 960 break; 961 case S_IFLNK: 962 inode->i_op = &orangefs_symlink_inode_operations; 963 break; 964 case S_IFDIR: 965 inode->i_op = &orangefs_dir_inode_operations; 966 inode->i_fop = &orangefs_dir_operations; 967 break; 968 default: 969 gossip_debug(GOSSIP_INODE_DEBUG, 970 "%s: unsupported mode\n", 971 __func__); 972 return -EINVAL; 973 } 974 975 return 0; 976 } 977 978 /* 979 * Given an ORANGEFS object identifier (fsid, handle), convert it into 980 * a ino_t type that will be used as a hash-index from where the handle will 981 * be searched for in the VFS hash table of inodes. 982 */ 983 static inline ino_t orangefs_handle_hash(struct orangefs_object_kref *ref) 984 { 985 if (!ref) 986 return 0; 987 return orangefs_khandle_to_ino(&(ref->khandle)); 988 } 989 990 /* 991 * Called to set up an inode from iget5_locked. 992 */ 993 static int orangefs_set_inode(struct inode *inode, void *data) 994 { 995 struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data; 996 ORANGEFS_I(inode)->refn.fs_id = ref->fs_id; 997 ORANGEFS_I(inode)->refn.khandle = ref->khandle; 998 ORANGEFS_I(inode)->attr_valid = 0; 999 hash_init(ORANGEFS_I(inode)->xattr_cache); 1000 ORANGEFS_I(inode)->mapping_time = jiffies - 1; 1001 ORANGEFS_I(inode)->bitlock = 0; 1002 return 0; 1003 } 1004 1005 /* 1006 * Called to determine if handles match. 1007 */ 1008 static int orangefs_test_inode(struct inode *inode, void *data) 1009 { 1010 struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data; 1011 struct orangefs_inode_s *orangefs_inode = NULL; 1012 1013 orangefs_inode = ORANGEFS_I(inode); 1014 /* test handles and fs_ids... */ 1015 return (!ORANGEFS_khandle_cmp(&(orangefs_inode->refn.khandle), 1016 &(ref->khandle)) && 1017 orangefs_inode->refn.fs_id == ref->fs_id); 1018 } 1019 1020 /* 1021 * Front-end to lookup the inode-cache maintained by the VFS using the ORANGEFS 1022 * file handle. 1023 * 1024 * @sb: the file system super block instance. 1025 * @ref: The ORANGEFS object for which we are trying to locate an inode. 1026 */ 1027 struct inode *orangefs_iget(struct super_block *sb, 1028 struct orangefs_object_kref *ref) 1029 { 1030 struct inode *inode = NULL; 1031 unsigned long hash; 1032 int error; 1033 1034 hash = orangefs_handle_hash(ref); 1035 inode = iget5_locked(sb, 1036 hash, 1037 orangefs_test_inode, 1038 orangefs_set_inode, 1039 ref); 1040 1041 if (!inode) 1042 return ERR_PTR(-ENOMEM); 1043 1044 if (!(inode->i_state & I_NEW)) 1045 return inode; 1046 1047 error = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_NEW); 1048 if (error) { 1049 iget_failed(inode); 1050 return ERR_PTR(error); 1051 } 1052 1053 inode->i_ino = hash; /* needed for stat etc */ 1054 orangefs_init_iops(inode); 1055 unlock_new_inode(inode); 1056 1057 gossip_debug(GOSSIP_INODE_DEBUG, 1058 "iget handle %pU, fsid %d hash %ld i_ino %lu\n", 1059 &ref->khandle, 1060 ref->fs_id, 1061 hash, 1062 inode->i_ino); 1063 1064 return inode; 1065 } 1066 1067 /* 1068 * Allocate an inode for a newly created file and insert it into the inode hash. 1069 */ 1070 struct inode *orangefs_new_inode(struct super_block *sb, struct inode *dir, 1071 umode_t mode, dev_t dev, struct orangefs_object_kref *ref) 1072 { 1073 struct posix_acl *acl = NULL, *default_acl = NULL; 1074 unsigned long hash = orangefs_handle_hash(ref); 1075 struct inode *inode; 1076 int error; 1077 1078 gossip_debug(GOSSIP_INODE_DEBUG, 1079 "%s:(sb is %p | MAJOR(dev)=%u | MINOR(dev)=%u mode=%o)\n", 1080 __func__, 1081 sb, 1082 MAJOR(dev), 1083 MINOR(dev), 1084 mode); 1085 1086 inode = new_inode(sb); 1087 if (!inode) 1088 return ERR_PTR(-ENOMEM); 1089 1090 error = posix_acl_create(dir, &mode, &default_acl, &acl); 1091 if (error) 1092 goto out_iput; 1093 1094 orangefs_set_inode(inode, ref); 1095 inode->i_ino = hash; /* needed for stat etc */ 1096 1097 error = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_NEW); 1098 if (error) 1099 goto out_iput; 1100 1101 orangefs_init_iops(inode); 1102 inode->i_rdev = dev; 1103 1104 if (default_acl) { 1105 error = __orangefs_set_acl(inode, default_acl, 1106 ACL_TYPE_DEFAULT); 1107 if (error) 1108 goto out_iput; 1109 } 1110 1111 if (acl) { 1112 error = __orangefs_set_acl(inode, acl, ACL_TYPE_ACCESS); 1113 if (error) 1114 goto out_iput; 1115 } 1116 1117 error = insert_inode_locked4(inode, hash, orangefs_test_inode, ref); 1118 if (error < 0) 1119 goto out_iput; 1120 1121 gossip_debug(GOSSIP_INODE_DEBUG, 1122 "Initializing ACL's for inode %pU\n", 1123 get_khandle_from_ino(inode)); 1124 if (mode != inode->i_mode) { 1125 struct iattr iattr = { 1126 .ia_mode = mode, 1127 .ia_valid = ATTR_MODE, 1128 }; 1129 inode->i_mode = mode; 1130 __orangefs_setattr(inode, &iattr); 1131 __posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode); 1132 } 1133 posix_acl_release(acl); 1134 posix_acl_release(default_acl); 1135 return inode; 1136 1137 out_iput: 1138 iput(inode); 1139 posix_acl_release(acl); 1140 posix_acl_release(default_acl); 1141 return ERR_PTR(error); 1142 } 1143