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