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 page *page, 20 struct writeback_control *wbc) 21 { 22 struct inode *inode = page->mapping->host; 23 struct orangefs_write_range *wr = NULL; 24 struct iov_iter iter; 25 struct bio_vec bv; 26 size_t len, wlen; 27 ssize_t ret; 28 loff_t off; 29 30 set_page_writeback(page); 31 32 len = i_size_read(inode); 33 if (PagePrivate(page)) { 34 wr = (struct orangefs_write_range *)page_private(page); 35 WARN_ON(wr->pos >= len); 36 off = wr->pos; 37 if (off + wr->len > len) 38 wlen = len - off; 39 else 40 wlen = wr->len; 41 } else { 42 WARN_ON(1); 43 off = page_offset(page); 44 if (off + PAGE_SIZE > len) 45 wlen = len - off; 46 else 47 wlen = PAGE_SIZE; 48 } 49 /* Should've been handled in orangefs_invalidate_folio. */ 50 WARN_ON(off == len || off + wlen > len); 51 52 WARN_ON(wlen == 0); 53 bvec_set_page(&bv, page, wlen, off % PAGE_SIZE); 54 iov_iter_bvec(&iter, ITER_SOURCE, &bv, 1, wlen); 55 56 ret = wait_for_direct_io(ORANGEFS_IO_WRITE, inode, &off, &iter, wlen, 57 len, wr, NULL, NULL); 58 if (ret < 0) { 59 SetPageError(page); 60 mapping_set_error(page->mapping, ret); 61 } else { 62 ret = 0; 63 } 64 kfree(detach_page_private(page)); 65 return ret; 66 } 67 68 static int orangefs_writepage(struct page *page, struct writeback_control *wbc) 69 { 70 int ret; 71 ret = orangefs_writepage_locked(page, wbc); 72 unlock_page(page); 73 end_page_writeback(page); 74 return ret; 75 } 76 77 struct orangefs_writepages { 78 loff_t off; 79 size_t len; 80 kuid_t uid; 81 kgid_t gid; 82 int maxpages; 83 int npages; 84 struct page **pages; 85 struct bio_vec *bv; 86 }; 87 88 static int orangefs_writepages_work(struct orangefs_writepages *ow, 89 struct writeback_control *wbc) 90 { 91 struct inode *inode = ow->pages[0]->mapping->host; 92 struct orangefs_write_range *wrp, wr; 93 struct iov_iter iter; 94 ssize_t ret; 95 size_t len; 96 loff_t off; 97 int i; 98 99 len = i_size_read(inode); 100 101 for (i = 0; i < ow->npages; i++) { 102 set_page_writeback(ow->pages[i]); 103 bvec_set_page(&ow->bv[i], ow->pages[i], 104 min(page_offset(ow->pages[i]) + PAGE_SIZE, 105 ow->off + ow->len) - 106 max(ow->off, page_offset(ow->pages[i])), 107 i == 0 ? ow->off - page_offset(ow->pages[i]) : 0); 108 } 109 iov_iter_bvec(&iter, ITER_SOURCE, ow->bv, ow->npages, ow->len); 110 111 WARN_ON(ow->off >= len); 112 if (ow->off + ow->len > len) 113 ow->len = len - ow->off; 114 115 off = ow->off; 116 wr.uid = ow->uid; 117 wr.gid = ow->gid; 118 ret = wait_for_direct_io(ORANGEFS_IO_WRITE, inode, &off, &iter, ow->len, 119 0, &wr, NULL, NULL); 120 if (ret < 0) { 121 for (i = 0; i < ow->npages; i++) { 122 SetPageError(ow->pages[i]); 123 mapping_set_error(ow->pages[i]->mapping, ret); 124 if (PagePrivate(ow->pages[i])) { 125 wrp = (struct orangefs_write_range *) 126 page_private(ow->pages[i]); 127 ClearPagePrivate(ow->pages[i]); 128 put_page(ow->pages[i]); 129 kfree(wrp); 130 } 131 end_page_writeback(ow->pages[i]); 132 unlock_page(ow->pages[i]); 133 } 134 } else { 135 ret = 0; 136 for (i = 0; i < ow->npages; i++) { 137 if (PagePrivate(ow->pages[i])) { 138 wrp = (struct orangefs_write_range *) 139 page_private(ow->pages[i]); 140 ClearPagePrivate(ow->pages[i]); 141 put_page(ow->pages[i]); 142 kfree(wrp); 143 } 144 end_page_writeback(ow->pages[i]); 145 unlock_page(ow->pages[i]); 146 } 147 } 148 return ret; 149 } 150 151 static int orangefs_writepages_callback(struct folio *folio, 152 struct writeback_control *wbc, void *data) 153 { 154 struct orangefs_writepages *ow = data; 155 struct orangefs_write_range *wr = folio->private; 156 int ret; 157 158 if (!wr) { 159 folio_unlock(folio); 160 /* It's not private so there's nothing to write, right? */ 161 printk("writepages_callback not private!\n"); 162 BUG(); 163 return 0; 164 } 165 166 ret = -1; 167 if (ow->npages == 0) { 168 ow->off = wr->pos; 169 ow->len = wr->len; 170 ow->uid = wr->uid; 171 ow->gid = wr->gid; 172 ow->pages[ow->npages++] = &folio->page; 173 ret = 0; 174 goto done; 175 } 176 if (!uid_eq(ow->uid, wr->uid) || !gid_eq(ow->gid, wr->gid)) { 177 orangefs_writepages_work(ow, wbc); 178 ow->npages = 0; 179 ret = -1; 180 goto done; 181 } 182 if (ow->off + ow->len == wr->pos) { 183 ow->len += wr->len; 184 ow->pages[ow->npages++] = &folio->page; 185 ret = 0; 186 goto done; 187 } 188 done: 189 if (ret == -1) { 190 if (ow->npages) { 191 orangefs_writepages_work(ow, wbc); 192 ow->npages = 0; 193 } 194 ret = orangefs_writepage_locked(&folio->page, wbc); 195 mapping_set_error(folio->mapping, ret); 196 folio_unlock(folio); 197 folio_end_writeback(folio); 198 } else { 199 if (ow->npages == ow->maxpages) { 200 orangefs_writepages_work(ow, wbc); 201 ow->npages = 0; 202 } 203 } 204 return ret; 205 } 206 207 static int orangefs_writepages(struct address_space *mapping, 208 struct writeback_control *wbc) 209 { 210 struct orangefs_writepages *ow; 211 struct blk_plug plug; 212 int ret; 213 ow = kzalloc(sizeof(struct orangefs_writepages), GFP_KERNEL); 214 if (!ow) 215 return -ENOMEM; 216 ow->maxpages = orangefs_bufmap_size_query()/PAGE_SIZE; 217 ow->pages = kcalloc(ow->maxpages, sizeof(struct page *), GFP_KERNEL); 218 if (!ow->pages) { 219 kfree(ow); 220 return -ENOMEM; 221 } 222 ow->bv = kcalloc(ow->maxpages, sizeof(struct bio_vec), GFP_KERNEL); 223 if (!ow->bv) { 224 kfree(ow->pages); 225 kfree(ow); 226 return -ENOMEM; 227 } 228 blk_start_plug(&plug); 229 ret = write_cache_pages(mapping, wbc, orangefs_writepages_callback, ow); 230 if (ow->npages) 231 ret = orangefs_writepages_work(ow, wbc); 232 blk_finish_plug(&plug); 233 kfree(ow->pages); 234 kfree(ow->bv); 235 kfree(ow); 236 return ret; 237 } 238 239 static int orangefs_launder_folio(struct folio *); 240 241 static void orangefs_readahead(struct readahead_control *rac) 242 { 243 loff_t offset; 244 struct iov_iter iter; 245 struct inode *inode = rac->mapping->host; 246 struct xarray *i_pages; 247 struct folio *folio; 248 loff_t new_start = readahead_pos(rac); 249 int ret; 250 size_t new_len = 0; 251 252 loff_t bytes_remaining = inode->i_size - readahead_pos(rac); 253 loff_t pages_remaining = bytes_remaining / PAGE_SIZE; 254 255 if (pages_remaining >= 1024) 256 new_len = 4194304; 257 else if (pages_remaining > readahead_count(rac)) 258 new_len = bytes_remaining; 259 260 if (new_len) 261 readahead_expand(rac, new_start, new_len); 262 263 offset = readahead_pos(rac); 264 i_pages = &rac->mapping->i_pages; 265 266 iov_iter_xarray(&iter, ITER_DEST, i_pages, offset, readahead_length(rac)); 267 268 /* read in the pages. */ 269 if ((ret = wait_for_direct_io(ORANGEFS_IO_READ, inode, 270 &offset, &iter, readahead_length(rac), 271 inode->i_size, NULL, NULL, rac->file)) < 0) 272 gossip_debug(GOSSIP_FILE_DEBUG, 273 "%s: wait_for_direct_io failed. \n", __func__); 274 else 275 ret = 0; 276 277 /* clean up. */ 278 while ((folio = readahead_folio(rac))) { 279 if (!ret) 280 folio_mark_uptodate(folio); 281 folio_unlock(folio); 282 } 283 } 284 285 static int orangefs_read_folio(struct file *file, struct folio *folio) 286 { 287 struct inode *inode = folio->mapping->host; 288 struct iov_iter iter; 289 struct bio_vec bv; 290 ssize_t ret; 291 loff_t off; /* offset of this folio in the file */ 292 293 if (folio_test_dirty(folio)) 294 orangefs_launder_folio(folio); 295 296 off = folio_pos(folio); 297 bvec_set_folio(&bv, folio, folio_size(folio), 0); 298 iov_iter_bvec(&iter, ITER_DEST, &bv, 1, folio_size(folio)); 299 300 ret = wait_for_direct_io(ORANGEFS_IO_READ, inode, &off, &iter, 301 folio_size(folio), inode->i_size, NULL, NULL, file); 302 /* this will only zero remaining unread portions of the folio data */ 303 iov_iter_zero(~0U, &iter); 304 /* takes care of potential aliasing */ 305 flush_dcache_folio(folio); 306 if (ret < 0) { 307 folio_set_error(folio); 308 } else { 309 folio_mark_uptodate(folio); 310 ret = 0; 311 } 312 /* unlock the folio after the ->read_folio() routine completes */ 313 folio_unlock(folio); 314 return ret; 315 } 316 317 static int orangefs_write_begin(struct file *file, 318 struct address_space *mapping, loff_t pos, unsigned len, 319 struct page **pagep, void **fsdata) 320 { 321 struct orangefs_write_range *wr; 322 struct folio *folio; 323 struct page *page; 324 pgoff_t index; 325 int ret; 326 327 index = pos >> PAGE_SHIFT; 328 329 page = grab_cache_page_write_begin(mapping, index); 330 if (!page) 331 return -ENOMEM; 332 333 *pagep = page; 334 folio = page_folio(page); 335 336 if (folio_test_dirty(folio) && !folio_test_private(folio)) { 337 /* 338 * Should be impossible. If it happens, launder the page 339 * since we don't know what's dirty. This will WARN in 340 * orangefs_writepage_locked. 341 */ 342 ret = orangefs_launder_folio(folio); 343 if (ret) 344 return ret; 345 } 346 if (folio_test_private(folio)) { 347 struct orangefs_write_range *wr; 348 wr = folio_get_private(folio); 349 if (wr->pos + wr->len == pos && 350 uid_eq(wr->uid, current_fsuid()) && 351 gid_eq(wr->gid, current_fsgid())) { 352 wr->len += len; 353 goto okay; 354 } else { 355 ret = orangefs_launder_folio(folio); 356 if (ret) 357 return ret; 358 } 359 } 360 361 wr = kmalloc(sizeof *wr, GFP_KERNEL); 362 if (!wr) 363 return -ENOMEM; 364 365 wr->pos = pos; 366 wr->len = len; 367 wr->uid = current_fsuid(); 368 wr->gid = current_fsgid(); 369 folio_attach_private(folio, wr); 370 okay: 371 return 0; 372 } 373 374 static int orangefs_write_end(struct file *file, struct address_space *mapping, 375 loff_t pos, unsigned len, unsigned copied, struct page *page, void *fsdata) 376 { 377 struct inode *inode = page->mapping->host; 378 loff_t last_pos = pos + copied; 379 380 /* 381 * No need to use i_size_read() here, the i_size 382 * cannot change under us because we hold the i_mutex. 383 */ 384 if (last_pos > inode->i_size) 385 i_size_write(inode, last_pos); 386 387 /* zero the stale part of the page if we did a short copy */ 388 if (!PageUptodate(page)) { 389 unsigned from = pos & (PAGE_SIZE - 1); 390 if (copied < len) { 391 zero_user(page, from + copied, len - copied); 392 } 393 /* Set fully written pages uptodate. */ 394 if (pos == page_offset(page) && 395 (len == PAGE_SIZE || pos + len == inode->i_size)) { 396 zero_user_segment(page, from + copied, PAGE_SIZE); 397 SetPageUptodate(page); 398 } 399 } 400 401 set_page_dirty(page); 402 unlock_page(page); 403 put_page(page); 404 405 mark_inode_dirty_sync(file_inode(file)); 406 return copied; 407 } 408 409 static void orangefs_invalidate_folio(struct folio *folio, 410 size_t offset, size_t length) 411 { 412 struct orangefs_write_range *wr = folio_get_private(folio); 413 414 if (offset == 0 && length == PAGE_SIZE) { 415 kfree(folio_detach_private(folio)); 416 return; 417 /* write range entirely within invalidate range (or equal) */ 418 } else if (folio_pos(folio) + offset <= wr->pos && 419 wr->pos + wr->len <= folio_pos(folio) + offset + length) { 420 kfree(folio_detach_private(folio)); 421 /* XXX is this right? only caller in fs */ 422 folio_cancel_dirty(folio); 423 return; 424 /* invalidate range chops off end of write range */ 425 } else if (wr->pos < folio_pos(folio) + offset && 426 wr->pos + wr->len <= folio_pos(folio) + offset + length && 427 folio_pos(folio) + offset < wr->pos + wr->len) { 428 size_t x; 429 x = wr->pos + wr->len - (folio_pos(folio) + offset); 430 WARN_ON(x > wr->len); 431 wr->len -= x; 432 wr->uid = current_fsuid(); 433 wr->gid = current_fsgid(); 434 /* invalidate range chops off beginning of write range */ 435 } else if (folio_pos(folio) + offset <= wr->pos && 436 folio_pos(folio) + offset + length < wr->pos + wr->len && 437 wr->pos < folio_pos(folio) + offset + length) { 438 size_t x; 439 x = folio_pos(folio) + offset + length - wr->pos; 440 WARN_ON(x > wr->len); 441 wr->pos += x; 442 wr->len -= x; 443 wr->uid = current_fsuid(); 444 wr->gid = current_fsgid(); 445 /* invalidate range entirely within write range (punch hole) */ 446 } else if (wr->pos < folio_pos(folio) + offset && 447 folio_pos(folio) + offset + length < wr->pos + wr->len) { 448 /* XXX what do we do here... should not WARN_ON */ 449 WARN_ON(1); 450 /* punch hole */ 451 /* 452 * should we just ignore this and write it out anyway? 453 * it hardly makes sense 454 */ 455 return; 456 /* non-overlapping ranges */ 457 } else { 458 /* WARN if they do overlap */ 459 if (!((folio_pos(folio) + offset + length <= wr->pos) ^ 460 (wr->pos + wr->len <= folio_pos(folio) + offset))) { 461 WARN_ON(1); 462 printk("invalidate range offset %llu length %zu\n", 463 folio_pos(folio) + offset, length); 464 printk("write range offset %llu length %zu\n", 465 wr->pos, wr->len); 466 } 467 return; 468 } 469 470 /* 471 * Above there are returns where wr is freed or where we WARN. 472 * Thus the following runs if wr was modified above. 473 */ 474 475 orangefs_launder_folio(folio); 476 } 477 478 static bool orangefs_release_folio(struct folio *folio, gfp_t foo) 479 { 480 return !folio_test_private(folio); 481 } 482 483 static void orangefs_free_folio(struct folio *folio) 484 { 485 kfree(folio_detach_private(folio)); 486 } 487 488 static int orangefs_launder_folio(struct folio *folio) 489 { 490 int r = 0; 491 struct writeback_control wbc = { 492 .sync_mode = WB_SYNC_ALL, 493 .nr_to_write = 0, 494 }; 495 folio_wait_writeback(folio); 496 if (folio_clear_dirty_for_io(folio)) { 497 r = orangefs_writepage_locked(&folio->page, &wbc); 498 folio_end_writeback(folio); 499 } 500 return r; 501 } 502 503 static ssize_t orangefs_direct_IO(struct kiocb *iocb, 504 struct iov_iter *iter) 505 { 506 /* 507 * Comment from original do_readv_writev: 508 * Common entry point for read/write/readv/writev 509 * This function will dispatch it to either the direct I/O 510 * or buffered I/O path depending on the mount options and/or 511 * augmented/extended metadata attached to the file. 512 * Note: File extended attributes override any mount options. 513 */ 514 struct file *file = iocb->ki_filp; 515 loff_t pos = iocb->ki_pos; 516 enum ORANGEFS_io_type type = iov_iter_rw(iter) == WRITE ? 517 ORANGEFS_IO_WRITE : ORANGEFS_IO_READ; 518 loff_t *offset = &pos; 519 struct inode *inode = file->f_mapping->host; 520 struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode); 521 struct orangefs_khandle *handle = &orangefs_inode->refn.khandle; 522 size_t count = iov_iter_count(iter); 523 ssize_t total_count = 0; 524 ssize_t ret = -EINVAL; 525 526 gossip_debug(GOSSIP_FILE_DEBUG, 527 "%s-BEGIN(%pU): count(%d) after estimate_max_iovecs.\n", 528 __func__, 529 handle, 530 (int)count); 531 532 if (type == ORANGEFS_IO_WRITE) { 533 gossip_debug(GOSSIP_FILE_DEBUG, 534 "%s(%pU): proceeding with offset : %llu, " 535 "size %d\n", 536 __func__, 537 handle, 538 llu(*offset), 539 (int)count); 540 } 541 542 if (count == 0) { 543 ret = 0; 544 goto out; 545 } 546 547 while (iov_iter_count(iter)) { 548 size_t each_count = iov_iter_count(iter); 549 size_t amt_complete; 550 551 /* how much to transfer in this loop iteration */ 552 if (each_count > orangefs_bufmap_size_query()) 553 each_count = orangefs_bufmap_size_query(); 554 555 gossip_debug(GOSSIP_FILE_DEBUG, 556 "%s(%pU): size of each_count(%d)\n", 557 __func__, 558 handle, 559 (int)each_count); 560 gossip_debug(GOSSIP_FILE_DEBUG, 561 "%s(%pU): BEFORE wait_for_io: offset is %d\n", 562 __func__, 563 handle, 564 (int)*offset); 565 566 ret = wait_for_direct_io(type, inode, offset, iter, 567 each_count, 0, NULL, NULL, file); 568 gossip_debug(GOSSIP_FILE_DEBUG, 569 "%s(%pU): return from wait_for_io:%d\n", 570 __func__, 571 handle, 572 (int)ret); 573 574 if (ret < 0) 575 goto out; 576 577 *offset += ret; 578 total_count += ret; 579 amt_complete = ret; 580 581 gossip_debug(GOSSIP_FILE_DEBUG, 582 "%s(%pU): AFTER wait_for_io: offset is %d\n", 583 __func__, 584 handle, 585 (int)*offset); 586 587 /* 588 * if we got a short I/O operations, 589 * fall out and return what we got so far 590 */ 591 if (amt_complete < each_count) 592 break; 593 } /*end while */ 594 595 out: 596 if (total_count > 0) 597 ret = total_count; 598 if (ret > 0) { 599 if (type == ORANGEFS_IO_READ) { 600 file_accessed(file); 601 } else { 602 file_update_time(file); 603 if (*offset > i_size_read(inode)) 604 i_size_write(inode, *offset); 605 } 606 } 607 608 gossip_debug(GOSSIP_FILE_DEBUG, 609 "%s(%pU): Value(%d) returned.\n", 610 __func__, 611 handle, 612 (int)ret); 613 614 return ret; 615 } 616 617 /** ORANGEFS2 implementation of address space operations */ 618 static const struct address_space_operations orangefs_address_operations = { 619 .writepage = orangefs_writepage, 620 .readahead = orangefs_readahead, 621 .read_folio = orangefs_read_folio, 622 .writepages = orangefs_writepages, 623 .dirty_folio = filemap_dirty_folio, 624 .write_begin = orangefs_write_begin, 625 .write_end = orangefs_write_end, 626 .invalidate_folio = orangefs_invalidate_folio, 627 .release_folio = orangefs_release_folio, 628 .free_folio = orangefs_free_folio, 629 .launder_folio = orangefs_launder_folio, 630 .direct_IO = orangefs_direct_IO, 631 }; 632 633 vm_fault_t orangefs_page_mkwrite(struct vm_fault *vmf) 634 { 635 struct folio *folio = page_folio(vmf->page); 636 struct inode *inode = file_inode(vmf->vma->vm_file); 637 struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode); 638 unsigned long *bitlock = &orangefs_inode->bitlock; 639 vm_fault_t ret; 640 struct orangefs_write_range *wr; 641 642 sb_start_pagefault(inode->i_sb); 643 644 if (wait_on_bit(bitlock, 1, TASK_KILLABLE)) { 645 ret = VM_FAULT_RETRY; 646 goto out; 647 } 648 649 folio_lock(folio); 650 if (folio_test_dirty(folio) && !folio_test_private(folio)) { 651 /* 652 * Should be impossible. If it happens, launder the folio 653 * since we don't know what's dirty. This will WARN in 654 * orangefs_writepage_locked. 655 */ 656 if (orangefs_launder_folio(folio)) { 657 ret = VM_FAULT_LOCKED|VM_FAULT_RETRY; 658 goto out; 659 } 660 } 661 if (folio_test_private(folio)) { 662 wr = folio_get_private(folio); 663 if (uid_eq(wr->uid, current_fsuid()) && 664 gid_eq(wr->gid, current_fsgid())) { 665 wr->pos = page_offset(vmf->page); 666 wr->len = PAGE_SIZE; 667 goto okay; 668 } else { 669 if (orangefs_launder_folio(folio)) { 670 ret = VM_FAULT_LOCKED|VM_FAULT_RETRY; 671 goto out; 672 } 673 } 674 } 675 wr = kmalloc(sizeof *wr, GFP_KERNEL); 676 if (!wr) { 677 ret = VM_FAULT_LOCKED|VM_FAULT_RETRY; 678 goto out; 679 } 680 wr->pos = page_offset(vmf->page); 681 wr->len = PAGE_SIZE; 682 wr->uid = current_fsuid(); 683 wr->gid = current_fsgid(); 684 folio_attach_private(folio, wr); 685 okay: 686 687 file_update_time(vmf->vma->vm_file); 688 if (folio->mapping != inode->i_mapping) { 689 folio_unlock(folio); 690 ret = VM_FAULT_LOCKED|VM_FAULT_NOPAGE; 691 goto out; 692 } 693 694 /* 695 * We mark the folio dirty already here so that when freeze is in 696 * progress, we are guaranteed that writeback during freezing will 697 * see the dirty folio and writeprotect it again. 698 */ 699 folio_mark_dirty(folio); 700 folio_wait_stable(folio); 701 ret = VM_FAULT_LOCKED; 702 out: 703 sb_end_pagefault(inode->i_sb); 704 return ret; 705 } 706 707 static int orangefs_setattr_size(struct inode *inode, struct iattr *iattr) 708 { 709 struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode); 710 struct orangefs_kernel_op_s *new_op; 711 loff_t orig_size; 712 int ret = -EINVAL; 713 714 gossip_debug(GOSSIP_INODE_DEBUG, 715 "%s: %pU: Handle is %pU | fs_id %d | size is %llu\n", 716 __func__, 717 get_khandle_from_ino(inode), 718 &orangefs_inode->refn.khandle, 719 orangefs_inode->refn.fs_id, 720 iattr->ia_size); 721 722 /* Ensure that we have a up to date size, so we know if it changed. */ 723 ret = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_SIZE); 724 if (ret == -ESTALE) 725 ret = -EIO; 726 if (ret) { 727 gossip_err("%s: orangefs_inode_getattr failed, ret:%d:.\n", 728 __func__, ret); 729 return ret; 730 } 731 orig_size = i_size_read(inode); 732 733 /* This is truncate_setsize in a different order. */ 734 truncate_pagecache(inode, iattr->ia_size); 735 i_size_write(inode, iattr->ia_size); 736 if (iattr->ia_size > orig_size) 737 pagecache_isize_extended(inode, orig_size, iattr->ia_size); 738 739 new_op = op_alloc(ORANGEFS_VFS_OP_TRUNCATE); 740 if (!new_op) 741 return -ENOMEM; 742 743 new_op->upcall.req.truncate.refn = orangefs_inode->refn; 744 new_op->upcall.req.truncate.size = (__s64) iattr->ia_size; 745 746 ret = service_operation(new_op, 747 __func__, 748 get_interruptible_flag(inode)); 749 750 /* 751 * the truncate has no downcall members to retrieve, but 752 * the status value tells us if it went through ok or not 753 */ 754 gossip_debug(GOSSIP_INODE_DEBUG, "%s: ret:%d:\n", __func__, ret); 755 756 op_release(new_op); 757 758 if (ret != 0) 759 return ret; 760 761 if (orig_size != i_size_read(inode)) 762 iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME; 763 764 return ret; 765 } 766 767 int __orangefs_setattr(struct inode *inode, struct iattr *iattr) 768 { 769 int ret; 770 771 if (iattr->ia_valid & ATTR_MODE) { 772 if (iattr->ia_mode & (S_ISVTX)) { 773 if (is_root_handle(inode)) { 774 /* 775 * allow sticky bit to be set on root (since 776 * it shows up that way by default anyhow), 777 * but don't show it to the server 778 */ 779 iattr->ia_mode -= S_ISVTX; 780 } else { 781 gossip_debug(GOSSIP_UTILS_DEBUG, 782 "User attempted to set sticky bit on non-root directory; returning EINVAL.\n"); 783 ret = -EINVAL; 784 goto out; 785 } 786 } 787 if (iattr->ia_mode & (S_ISUID)) { 788 gossip_debug(GOSSIP_UTILS_DEBUG, 789 "Attempting to set setuid bit (not supported); returning EINVAL.\n"); 790 ret = -EINVAL; 791 goto out; 792 } 793 } 794 795 if (iattr->ia_valid & ATTR_SIZE) { 796 ret = orangefs_setattr_size(inode, iattr); 797 if (ret) 798 goto out; 799 } 800 801 again: 802 spin_lock(&inode->i_lock); 803 if (ORANGEFS_I(inode)->attr_valid) { 804 if (uid_eq(ORANGEFS_I(inode)->attr_uid, current_fsuid()) && 805 gid_eq(ORANGEFS_I(inode)->attr_gid, current_fsgid())) { 806 ORANGEFS_I(inode)->attr_valid = iattr->ia_valid; 807 } else { 808 spin_unlock(&inode->i_lock); 809 write_inode_now(inode, 1); 810 goto again; 811 } 812 } else { 813 ORANGEFS_I(inode)->attr_valid = iattr->ia_valid; 814 ORANGEFS_I(inode)->attr_uid = current_fsuid(); 815 ORANGEFS_I(inode)->attr_gid = current_fsgid(); 816 } 817 setattr_copy(&nop_mnt_idmap, inode, iattr); 818 spin_unlock(&inode->i_lock); 819 mark_inode_dirty(inode); 820 821 ret = 0; 822 out: 823 return ret; 824 } 825 826 int __orangefs_setattr_mode(struct dentry *dentry, struct iattr *iattr) 827 { 828 int ret; 829 struct inode *inode = d_inode(dentry); 830 831 ret = __orangefs_setattr(inode, iattr); 832 /* change mode on a file that has ACLs */ 833 if (!ret && (iattr->ia_valid & ATTR_MODE)) 834 ret = posix_acl_chmod(&nop_mnt_idmap, dentry, inode->i_mode); 835 return ret; 836 } 837 838 /* 839 * Change attributes of an object referenced by dentry. 840 */ 841 int orangefs_setattr(struct mnt_idmap *idmap, struct dentry *dentry, 842 struct iattr *iattr) 843 { 844 int ret; 845 gossip_debug(GOSSIP_INODE_DEBUG, "__orangefs_setattr: called on %pd\n", 846 dentry); 847 ret = setattr_prepare(&nop_mnt_idmap, dentry, iattr); 848 if (ret) 849 goto out; 850 ret = __orangefs_setattr_mode(dentry, iattr); 851 sync_inode_metadata(d_inode(dentry), 1); 852 out: 853 gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_setattr: returning %d\n", 854 ret); 855 return ret; 856 } 857 858 /* 859 * Obtain attributes of an object given a dentry 860 */ 861 int orangefs_getattr(struct mnt_idmap *idmap, const struct path *path, 862 struct kstat *stat, u32 request_mask, unsigned int flags) 863 { 864 int ret; 865 struct inode *inode = path->dentry->d_inode; 866 867 gossip_debug(GOSSIP_INODE_DEBUG, 868 "orangefs_getattr: called on %pd mask %u\n", 869 path->dentry, request_mask); 870 871 ret = orangefs_inode_getattr(inode, 872 request_mask & STATX_SIZE ? ORANGEFS_GETATTR_SIZE : 0); 873 if (ret == 0) { 874 generic_fillattr(&nop_mnt_idmap, inode, stat); 875 876 /* override block size reported to stat */ 877 if (!(request_mask & STATX_SIZE)) 878 stat->result_mask &= ~STATX_SIZE; 879 880 generic_fill_statx_attr(inode, stat); 881 } 882 return ret; 883 } 884 885 int orangefs_permission(struct mnt_idmap *idmap, 886 struct inode *inode, int mask) 887 { 888 int ret; 889 890 if (mask & MAY_NOT_BLOCK) 891 return -ECHILD; 892 893 gossip_debug(GOSSIP_INODE_DEBUG, "%s: refreshing\n", __func__); 894 895 /* Make sure the permission (and other common attrs) are up to date. */ 896 ret = orangefs_inode_getattr(inode, 0); 897 if (ret < 0) 898 return ret; 899 900 return generic_permission(&nop_mnt_idmap, inode, mask); 901 } 902 903 int orangefs_update_time(struct inode *inode, struct timespec64 *time, int flags) 904 { 905 struct iattr iattr; 906 gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_update_time: %pU\n", 907 get_khandle_from_ino(inode)); 908 generic_update_time(inode, time, flags); 909 memset(&iattr, 0, sizeof iattr); 910 if (flags & S_ATIME) 911 iattr.ia_valid |= ATTR_ATIME; 912 if (flags & S_CTIME) 913 iattr.ia_valid |= ATTR_CTIME; 914 if (flags & S_MTIME) 915 iattr.ia_valid |= ATTR_MTIME; 916 return __orangefs_setattr(inode, &iattr); 917 } 918 919 static int orangefs_fileattr_get(struct dentry *dentry, struct fileattr *fa) 920 { 921 u64 val = 0; 922 int ret; 923 924 gossip_debug(GOSSIP_FILE_DEBUG, "%s: called on %pd\n", __func__, 925 dentry); 926 927 ret = orangefs_inode_getxattr(d_inode(dentry), 928 "user.pvfs2.meta_hint", 929 &val, sizeof(val)); 930 if (ret < 0 && ret != -ENODATA) 931 return ret; 932 933 gossip_debug(GOSSIP_FILE_DEBUG, "%s: flags=%u\n", __func__, (u32) val); 934 935 fileattr_fill_flags(fa, val); 936 return 0; 937 } 938 939 static int orangefs_fileattr_set(struct mnt_idmap *idmap, 940 struct dentry *dentry, struct fileattr *fa) 941 { 942 u64 val = 0; 943 944 gossip_debug(GOSSIP_FILE_DEBUG, "%s: called on %pd\n", __func__, 945 dentry); 946 /* 947 * ORANGEFS_MIRROR_FL is set internally when the mirroring mode is 948 * turned on for a file. The user is not allowed to turn on this bit, 949 * but the bit is present if the user first gets the flags and then 950 * updates the flags with some new settings. So, we ignore it in the 951 * following edit. bligon. 952 */ 953 if (fileattr_has_fsx(fa) || 954 (fa->flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | FS_NOATIME_FL | ORANGEFS_MIRROR_FL))) { 955 gossip_err("%s: only supports setting one of FS_IMMUTABLE_FL|FS_APPEND_FL|FS_NOATIME_FL\n", 956 __func__); 957 return -EOPNOTSUPP; 958 } 959 val = fa->flags; 960 gossip_debug(GOSSIP_FILE_DEBUG, "%s: flags=%u\n", __func__, (u32) val); 961 return orangefs_inode_setxattr(d_inode(dentry), 962 "user.pvfs2.meta_hint", 963 &val, sizeof(val), 0); 964 } 965 966 /* ORANGEFS2 implementation of VFS inode operations for files */ 967 static const struct inode_operations orangefs_file_inode_operations = { 968 .get_inode_acl = orangefs_get_acl, 969 .set_acl = orangefs_set_acl, 970 .setattr = orangefs_setattr, 971 .getattr = orangefs_getattr, 972 .listxattr = orangefs_listxattr, 973 .permission = orangefs_permission, 974 .update_time = orangefs_update_time, 975 .fileattr_get = orangefs_fileattr_get, 976 .fileattr_set = orangefs_fileattr_set, 977 }; 978 979 static int orangefs_init_iops(struct inode *inode) 980 { 981 inode->i_mapping->a_ops = &orangefs_address_operations; 982 983 switch (inode->i_mode & S_IFMT) { 984 case S_IFREG: 985 inode->i_op = &orangefs_file_inode_operations; 986 inode->i_fop = &orangefs_file_operations; 987 break; 988 case S_IFLNK: 989 inode->i_op = &orangefs_symlink_inode_operations; 990 break; 991 case S_IFDIR: 992 inode->i_op = &orangefs_dir_inode_operations; 993 inode->i_fop = &orangefs_dir_operations; 994 break; 995 default: 996 gossip_debug(GOSSIP_INODE_DEBUG, 997 "%s: unsupported mode\n", 998 __func__); 999 return -EINVAL; 1000 } 1001 1002 return 0; 1003 } 1004 1005 /* 1006 * Given an ORANGEFS object identifier (fsid, handle), convert it into 1007 * a ino_t type that will be used as a hash-index from where the handle will 1008 * be searched for in the VFS hash table of inodes. 1009 */ 1010 static inline ino_t orangefs_handle_hash(struct orangefs_object_kref *ref) 1011 { 1012 if (!ref) 1013 return 0; 1014 return orangefs_khandle_to_ino(&(ref->khandle)); 1015 } 1016 1017 /* 1018 * Called to set up an inode from iget5_locked. 1019 */ 1020 static int orangefs_set_inode(struct inode *inode, void *data) 1021 { 1022 struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data; 1023 ORANGEFS_I(inode)->refn.fs_id = ref->fs_id; 1024 ORANGEFS_I(inode)->refn.khandle = ref->khandle; 1025 ORANGEFS_I(inode)->attr_valid = 0; 1026 hash_init(ORANGEFS_I(inode)->xattr_cache); 1027 ORANGEFS_I(inode)->mapping_time = jiffies - 1; 1028 ORANGEFS_I(inode)->bitlock = 0; 1029 return 0; 1030 } 1031 1032 /* 1033 * Called to determine if handles match. 1034 */ 1035 static int orangefs_test_inode(struct inode *inode, void *data) 1036 { 1037 struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data; 1038 struct orangefs_inode_s *orangefs_inode = NULL; 1039 1040 orangefs_inode = ORANGEFS_I(inode); 1041 /* test handles and fs_ids... */ 1042 return (!ORANGEFS_khandle_cmp(&(orangefs_inode->refn.khandle), 1043 &(ref->khandle)) && 1044 orangefs_inode->refn.fs_id == ref->fs_id); 1045 } 1046 1047 /* 1048 * Front-end to lookup the inode-cache maintained by the VFS using the ORANGEFS 1049 * file handle. 1050 * 1051 * @sb: the file system super block instance. 1052 * @ref: The ORANGEFS object for which we are trying to locate an inode. 1053 */ 1054 struct inode *orangefs_iget(struct super_block *sb, 1055 struct orangefs_object_kref *ref) 1056 { 1057 struct inode *inode = NULL; 1058 unsigned long hash; 1059 int error; 1060 1061 hash = orangefs_handle_hash(ref); 1062 inode = iget5_locked(sb, 1063 hash, 1064 orangefs_test_inode, 1065 orangefs_set_inode, 1066 ref); 1067 1068 if (!inode) 1069 return ERR_PTR(-ENOMEM); 1070 1071 if (!(inode->i_state & I_NEW)) 1072 return inode; 1073 1074 error = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_NEW); 1075 if (error) { 1076 iget_failed(inode); 1077 return ERR_PTR(error); 1078 } 1079 1080 inode->i_ino = hash; /* needed for stat etc */ 1081 orangefs_init_iops(inode); 1082 unlock_new_inode(inode); 1083 1084 gossip_debug(GOSSIP_INODE_DEBUG, 1085 "iget handle %pU, fsid %d hash %ld i_ino %lu\n", 1086 &ref->khandle, 1087 ref->fs_id, 1088 hash, 1089 inode->i_ino); 1090 1091 return inode; 1092 } 1093 1094 /* 1095 * Allocate an inode for a newly created file and insert it into the inode hash. 1096 */ 1097 struct inode *orangefs_new_inode(struct super_block *sb, struct inode *dir, 1098 umode_t mode, dev_t dev, struct orangefs_object_kref *ref) 1099 { 1100 struct posix_acl *acl = NULL, *default_acl = NULL; 1101 unsigned long hash = orangefs_handle_hash(ref); 1102 struct inode *inode; 1103 int error; 1104 1105 gossip_debug(GOSSIP_INODE_DEBUG, 1106 "%s:(sb is %p | MAJOR(dev)=%u | MINOR(dev)=%u mode=%o)\n", 1107 __func__, 1108 sb, 1109 MAJOR(dev), 1110 MINOR(dev), 1111 mode); 1112 1113 inode = new_inode(sb); 1114 if (!inode) 1115 return ERR_PTR(-ENOMEM); 1116 1117 error = posix_acl_create(dir, &mode, &default_acl, &acl); 1118 if (error) 1119 goto out_iput; 1120 1121 orangefs_set_inode(inode, ref); 1122 inode->i_ino = hash; /* needed for stat etc */ 1123 1124 error = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_NEW); 1125 if (error) 1126 goto out_iput; 1127 1128 orangefs_init_iops(inode); 1129 inode->i_rdev = dev; 1130 1131 if (default_acl) { 1132 error = __orangefs_set_acl(inode, default_acl, 1133 ACL_TYPE_DEFAULT); 1134 if (error) 1135 goto out_iput; 1136 } 1137 1138 if (acl) { 1139 error = __orangefs_set_acl(inode, acl, ACL_TYPE_ACCESS); 1140 if (error) 1141 goto out_iput; 1142 } 1143 1144 error = insert_inode_locked4(inode, hash, orangefs_test_inode, ref); 1145 if (error < 0) 1146 goto out_iput; 1147 1148 gossip_debug(GOSSIP_INODE_DEBUG, 1149 "Initializing ACL's for inode %pU\n", 1150 get_khandle_from_ino(inode)); 1151 if (mode != inode->i_mode) { 1152 struct iattr iattr = { 1153 .ia_mode = mode, 1154 .ia_valid = ATTR_MODE, 1155 }; 1156 inode->i_mode = mode; 1157 __orangefs_setattr(inode, &iattr); 1158 __posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode); 1159 } 1160 posix_acl_release(acl); 1161 posix_acl_release(default_acl); 1162 return inode; 1163 1164 out_iput: 1165 iput(inode); 1166 posix_acl_release(acl); 1167 posix_acl_release(default_acl); 1168 return ERR_PTR(error); 1169 } 1170