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/bvec.h> 14 #include "protocol.h" 15 #include "orangefs-kernel.h" 16 #include "orangefs-bufmap.h" 17 18 static int orangefs_writepage_locked(struct page *page, 19 struct writeback_control *wbc) 20 { 21 struct inode *inode = page->mapping->host; 22 struct orangefs_write_range *wr = NULL; 23 struct iov_iter iter; 24 struct bio_vec bv; 25 size_t len, wlen; 26 ssize_t ret; 27 loff_t off; 28 29 set_page_writeback(page); 30 31 len = i_size_read(inode); 32 if (PagePrivate(page)) { 33 wr = (struct orangefs_write_range *)page_private(page); 34 WARN_ON(wr->pos >= len); 35 off = wr->pos; 36 if (off + wr->len > len) 37 wlen = len - off; 38 else 39 wlen = wr->len; 40 } else { 41 WARN_ON(1); 42 off = page_offset(page); 43 if (off + PAGE_SIZE > len) 44 wlen = len - off; 45 else 46 wlen = PAGE_SIZE; 47 } 48 /* Should've been handled in orangefs_invalidatepage. */ 49 WARN_ON(off == len || off + wlen > len); 50 51 bv.bv_page = page; 52 bv.bv_len = wlen; 53 bv.bv_offset = off % PAGE_SIZE; 54 WARN_ON(wlen == 0); 55 iov_iter_bvec(&iter, WRITE, &bv, 1, wlen); 56 57 ret = wait_for_direct_io(ORANGEFS_IO_WRITE, inode, &off, &iter, wlen, 58 len, wr, NULL, NULL); 59 if (ret < 0) { 60 SetPageError(page); 61 mapping_set_error(page->mapping, ret); 62 } else { 63 ret = 0; 64 } 65 kfree(detach_page_private(page)); 66 return ret; 67 } 68 69 static int orangefs_writepage(struct page *page, struct writeback_control *wbc) 70 { 71 int ret; 72 ret = orangefs_writepage_locked(page, wbc); 73 unlock_page(page); 74 end_page_writeback(page); 75 return ret; 76 } 77 78 struct orangefs_writepages { 79 loff_t off; 80 size_t len; 81 kuid_t uid; 82 kgid_t gid; 83 int maxpages; 84 int npages; 85 struct page **pages; 86 struct bio_vec *bv; 87 }; 88 89 static int orangefs_writepages_work(struct orangefs_writepages *ow, 90 struct writeback_control *wbc) 91 { 92 struct inode *inode = ow->pages[0]->mapping->host; 93 struct orangefs_write_range *wrp, wr; 94 struct iov_iter iter; 95 ssize_t ret; 96 size_t len; 97 loff_t off; 98 int i; 99 100 len = i_size_read(inode); 101 102 for (i = 0; i < ow->npages; i++) { 103 set_page_writeback(ow->pages[i]); 104 ow->bv[i].bv_page = ow->pages[i]; 105 ow->bv[i].bv_len = min(page_offset(ow->pages[i]) + PAGE_SIZE, 106 ow->off + ow->len) - 107 max(ow->off, page_offset(ow->pages[i])); 108 if (i == 0) 109 ow->bv[i].bv_offset = ow->off - 110 page_offset(ow->pages[i]); 111 else 112 ow->bv[i].bv_offset = 0; 113 } 114 iov_iter_bvec(&iter, WRITE, ow->bv, ow->npages, ow->len); 115 116 WARN_ON(ow->off >= len); 117 if (ow->off + ow->len > len) 118 ow->len = len - ow->off; 119 120 off = ow->off; 121 wr.uid = ow->uid; 122 wr.gid = ow->gid; 123 ret = wait_for_direct_io(ORANGEFS_IO_WRITE, inode, &off, &iter, ow->len, 124 0, &wr, NULL, NULL); 125 if (ret < 0) { 126 for (i = 0; i < ow->npages; i++) { 127 SetPageError(ow->pages[i]); 128 mapping_set_error(ow->pages[i]->mapping, ret); 129 if (PagePrivate(ow->pages[i])) { 130 wrp = (struct orangefs_write_range *) 131 page_private(ow->pages[i]); 132 ClearPagePrivate(ow->pages[i]); 133 put_page(ow->pages[i]); 134 kfree(wrp); 135 } 136 end_page_writeback(ow->pages[i]); 137 unlock_page(ow->pages[i]); 138 } 139 } else { 140 ret = 0; 141 for (i = 0; i < ow->npages; i++) { 142 if (PagePrivate(ow->pages[i])) { 143 wrp = (struct orangefs_write_range *) 144 page_private(ow->pages[i]); 145 ClearPagePrivate(ow->pages[i]); 146 put_page(ow->pages[i]); 147 kfree(wrp); 148 } 149 end_page_writeback(ow->pages[i]); 150 unlock_page(ow->pages[i]); 151 } 152 } 153 return ret; 154 } 155 156 static int orangefs_writepages_callback(struct page *page, 157 struct writeback_control *wbc, void *data) 158 { 159 struct orangefs_writepages *ow = data; 160 struct orangefs_write_range *wr; 161 int ret; 162 163 if (!PagePrivate(page)) { 164 unlock_page(page); 165 /* It's not private so there's nothing to write, right? */ 166 printk("writepages_callback not private!\n"); 167 BUG(); 168 return 0; 169 } 170 wr = (struct orangefs_write_range *)page_private(page); 171 172 ret = -1; 173 if (ow->npages == 0) { 174 ow->off = wr->pos; 175 ow->len = wr->len; 176 ow->uid = wr->uid; 177 ow->gid = wr->gid; 178 ow->pages[ow->npages++] = page; 179 ret = 0; 180 goto done; 181 } 182 if (!uid_eq(ow->uid, wr->uid) || !gid_eq(ow->gid, wr->gid)) { 183 orangefs_writepages_work(ow, wbc); 184 ow->npages = 0; 185 ret = -1; 186 goto done; 187 } 188 if (ow->off + ow->len == wr->pos) { 189 ow->len += wr->len; 190 ow->pages[ow->npages++] = page; 191 ret = 0; 192 goto done; 193 } 194 done: 195 if (ret == -1) { 196 if (ow->npages) { 197 orangefs_writepages_work(ow, wbc); 198 ow->npages = 0; 199 } 200 ret = orangefs_writepage_locked(page, wbc); 201 mapping_set_error(page->mapping, ret); 202 unlock_page(page); 203 end_page_writeback(page); 204 } else { 205 if (ow->npages == ow->maxpages) { 206 orangefs_writepages_work(ow, wbc); 207 ow->npages = 0; 208 } 209 } 210 return ret; 211 } 212 213 static int orangefs_writepages(struct address_space *mapping, 214 struct writeback_control *wbc) 215 { 216 struct orangefs_writepages *ow; 217 struct blk_plug plug; 218 int ret; 219 ow = kzalloc(sizeof(struct orangefs_writepages), GFP_KERNEL); 220 if (!ow) 221 return -ENOMEM; 222 ow->maxpages = orangefs_bufmap_size_query()/PAGE_SIZE; 223 ow->pages = kcalloc(ow->maxpages, sizeof(struct page *), GFP_KERNEL); 224 if (!ow->pages) { 225 kfree(ow); 226 return -ENOMEM; 227 } 228 ow->bv = kcalloc(ow->maxpages, sizeof(struct bio_vec), GFP_KERNEL); 229 if (!ow->bv) { 230 kfree(ow->pages); 231 kfree(ow); 232 return -ENOMEM; 233 } 234 blk_start_plug(&plug); 235 ret = write_cache_pages(mapping, wbc, orangefs_writepages_callback, ow); 236 if (ow->npages) 237 ret = orangefs_writepages_work(ow, wbc); 238 blk_finish_plug(&plug); 239 kfree(ow->pages); 240 kfree(ow->bv); 241 kfree(ow); 242 return ret; 243 } 244 245 static int orangefs_launder_page(struct page *); 246 247 static int orangefs_readpage(struct file *file, struct page *page) 248 { 249 struct inode *inode = page->mapping->host; 250 struct iov_iter iter; 251 struct bio_vec bv; 252 ssize_t ret; 253 loff_t off; /* offset into this page */ 254 pgoff_t index; /* which page */ 255 struct page *next_page; 256 char *kaddr; 257 loff_t read_size; 258 int buffer_index = -1; /* orangefs shared memory slot */ 259 int slot_index; /* index into slot */ 260 int remaining; 261 262 /* 263 * Get up to this many bytes from Orangefs at a time and try 264 * to fill them into the page cache at once. Tests with dd made 265 * this seem like a reasonable static number, if there was 266 * interest perhaps this number could be made setable through 267 * sysfs... 268 */ 269 read_size = 524288; 270 271 if (PageDirty(page)) 272 orangefs_launder_page(page); 273 274 off = page_offset(page); 275 index = off >> PAGE_SHIFT; 276 bv.bv_page = page; 277 bv.bv_len = PAGE_SIZE; 278 bv.bv_offset = 0; 279 iov_iter_bvec(&iter, READ, &bv, 1, PAGE_SIZE); 280 281 ret = wait_for_direct_io(ORANGEFS_IO_READ, inode, &off, &iter, 282 read_size, inode->i_size, NULL, &buffer_index, file); 283 remaining = ret; 284 /* this will only zero remaining unread portions of the page data */ 285 iov_iter_zero(~0U, &iter); 286 /* takes care of potential aliasing */ 287 flush_dcache_page(page); 288 if (ret < 0) { 289 SetPageError(page); 290 unlock_page(page); 291 goto out; 292 } else { 293 SetPageUptodate(page); 294 if (PageError(page)) 295 ClearPageError(page); 296 ret = 0; 297 } 298 /* unlock the page after the ->readpage() routine completes */ 299 unlock_page(page); 300 301 if (remaining > PAGE_SIZE) { 302 slot_index = 0; 303 while ((remaining - PAGE_SIZE) >= PAGE_SIZE) { 304 remaining -= PAGE_SIZE; 305 /* 306 * It is an optimization to try and fill more than one 307 * page... by now we've already gotten the single 308 * page we were after, if stuff doesn't seem to 309 * be going our way at this point just return 310 * and hope for the best. 311 * 312 * If we look for pages and they're already there is 313 * one reason to give up, and if they're not there 314 * and we can't create them is another reason. 315 */ 316 317 index++; 318 slot_index++; 319 next_page = find_get_page(inode->i_mapping, index); 320 if (next_page) { 321 gossip_debug(GOSSIP_FILE_DEBUG, 322 "%s: found next page, quitting\n", 323 __func__); 324 put_page(next_page); 325 goto out; 326 } 327 next_page = find_or_create_page(inode->i_mapping, 328 index, 329 GFP_KERNEL); 330 /* 331 * I've never hit this, leave it as a printk for 332 * now so it will be obvious. 333 */ 334 if (!next_page) { 335 printk("%s: can't create next page, quitting\n", 336 __func__); 337 goto out; 338 } 339 kaddr = kmap_atomic(next_page); 340 orangefs_bufmap_page_fill(kaddr, 341 buffer_index, 342 slot_index); 343 kunmap_atomic(kaddr); 344 SetPageUptodate(next_page); 345 unlock_page(next_page); 346 put_page(next_page); 347 } 348 } 349 350 out: 351 if (buffer_index != -1) 352 orangefs_bufmap_put(buffer_index); 353 return ret; 354 } 355 356 static int orangefs_write_begin(struct file *file, 357 struct address_space *mapping, 358 loff_t pos, unsigned len, unsigned flags, struct page **pagep, 359 void **fsdata) 360 { 361 struct orangefs_write_range *wr; 362 struct page *page; 363 pgoff_t index; 364 int ret; 365 366 index = pos >> PAGE_SHIFT; 367 368 page = grab_cache_page_write_begin(mapping, index, flags); 369 if (!page) 370 return -ENOMEM; 371 372 *pagep = page; 373 374 if (PageDirty(page) && !PagePrivate(page)) { 375 /* 376 * Should be impossible. If it happens, launder the page 377 * since we don't know what's dirty. This will WARN in 378 * orangefs_writepage_locked. 379 */ 380 ret = orangefs_launder_page(page); 381 if (ret) 382 return ret; 383 } 384 if (PagePrivate(page)) { 385 struct orangefs_write_range *wr; 386 wr = (struct orangefs_write_range *)page_private(page); 387 if (wr->pos + wr->len == pos && 388 uid_eq(wr->uid, current_fsuid()) && 389 gid_eq(wr->gid, current_fsgid())) { 390 wr->len += len; 391 goto okay; 392 } else { 393 ret = orangefs_launder_page(page); 394 if (ret) 395 return ret; 396 } 397 } 398 399 wr = kmalloc(sizeof *wr, GFP_KERNEL); 400 if (!wr) 401 return -ENOMEM; 402 403 wr->pos = pos; 404 wr->len = len; 405 wr->uid = current_fsuid(); 406 wr->gid = current_fsgid(); 407 attach_page_private(page, wr); 408 okay: 409 return 0; 410 } 411 412 static int orangefs_write_end(struct file *file, struct address_space *mapping, 413 loff_t pos, unsigned len, unsigned copied, struct page *page, void *fsdata) 414 { 415 struct inode *inode = page->mapping->host; 416 loff_t last_pos = pos + copied; 417 418 /* 419 * No need to use i_size_read() here, the i_size 420 * cannot change under us because we hold the i_mutex. 421 */ 422 if (last_pos > inode->i_size) 423 i_size_write(inode, last_pos); 424 425 /* zero the stale part of the page if we did a short copy */ 426 if (!PageUptodate(page)) { 427 unsigned from = pos & (PAGE_SIZE - 1); 428 if (copied < len) { 429 zero_user(page, from + copied, len - copied); 430 } 431 /* Set fully written pages uptodate. */ 432 if (pos == page_offset(page) && 433 (len == PAGE_SIZE || pos + len == inode->i_size)) { 434 zero_user_segment(page, from + copied, PAGE_SIZE); 435 SetPageUptodate(page); 436 } 437 } 438 439 set_page_dirty(page); 440 unlock_page(page); 441 put_page(page); 442 443 mark_inode_dirty_sync(file_inode(file)); 444 return copied; 445 } 446 447 static void orangefs_invalidatepage(struct page *page, 448 unsigned int offset, 449 unsigned int length) 450 { 451 struct orangefs_write_range *wr; 452 wr = (struct orangefs_write_range *)page_private(page); 453 454 if (offset == 0 && length == PAGE_SIZE) { 455 kfree(detach_page_private(page)); 456 return; 457 /* write range entirely within invalidate range (or equal) */ 458 } else if (page_offset(page) + offset <= wr->pos && 459 wr->pos + wr->len <= page_offset(page) + offset + length) { 460 kfree(detach_page_private(page)); 461 /* XXX is this right? only caller in fs */ 462 cancel_dirty_page(page); 463 return; 464 /* invalidate range chops off end of write range */ 465 } else if (wr->pos < page_offset(page) + offset && 466 wr->pos + wr->len <= page_offset(page) + offset + length && 467 page_offset(page) + offset < wr->pos + wr->len) { 468 size_t x; 469 x = wr->pos + wr->len - (page_offset(page) + offset); 470 WARN_ON(x > wr->len); 471 wr->len -= x; 472 wr->uid = current_fsuid(); 473 wr->gid = current_fsgid(); 474 /* invalidate range chops off beginning of write range */ 475 } else if (page_offset(page) + offset <= wr->pos && 476 page_offset(page) + offset + length < wr->pos + wr->len && 477 wr->pos < page_offset(page) + offset + length) { 478 size_t x; 479 x = page_offset(page) + offset + length - wr->pos; 480 WARN_ON(x > wr->len); 481 wr->pos += x; 482 wr->len -= x; 483 wr->uid = current_fsuid(); 484 wr->gid = current_fsgid(); 485 /* invalidate range entirely within write range (punch hole) */ 486 } else if (wr->pos < page_offset(page) + offset && 487 page_offset(page) + offset + length < wr->pos + wr->len) { 488 /* XXX what do we do here... should not WARN_ON */ 489 WARN_ON(1); 490 /* punch hole */ 491 /* 492 * should we just ignore this and write it out anyway? 493 * it hardly makes sense 494 */ 495 return; 496 /* non-overlapping ranges */ 497 } else { 498 /* WARN if they do overlap */ 499 if (!((page_offset(page) + offset + length <= wr->pos) ^ 500 (wr->pos + wr->len <= page_offset(page) + offset))) { 501 WARN_ON(1); 502 printk("invalidate range offset %llu length %u\n", 503 page_offset(page) + offset, length); 504 printk("write range offset %llu length %zu\n", 505 wr->pos, wr->len); 506 } 507 return; 508 } 509 510 /* 511 * Above there are returns where wr is freed or where we WARN. 512 * Thus the following runs if wr was modified above. 513 */ 514 515 orangefs_launder_page(page); 516 } 517 518 static int orangefs_releasepage(struct page *page, gfp_t foo) 519 { 520 return !PagePrivate(page); 521 } 522 523 static void orangefs_freepage(struct page *page) 524 { 525 kfree(detach_page_private(page)); 526 } 527 528 static int orangefs_launder_page(struct page *page) 529 { 530 int r = 0; 531 struct writeback_control wbc = { 532 .sync_mode = WB_SYNC_ALL, 533 .nr_to_write = 0, 534 }; 535 wait_on_page_writeback(page); 536 if (clear_page_dirty_for_io(page)) { 537 r = orangefs_writepage_locked(page, &wbc); 538 end_page_writeback(page); 539 } 540 return r; 541 } 542 543 static ssize_t orangefs_direct_IO(struct kiocb *iocb, 544 struct iov_iter *iter) 545 { 546 /* 547 * Comment from original do_readv_writev: 548 * Common entry point for read/write/readv/writev 549 * This function will dispatch it to either the direct I/O 550 * or buffered I/O path depending on the mount options and/or 551 * augmented/extended metadata attached to the file. 552 * Note: File extended attributes override any mount options. 553 */ 554 struct file *file = iocb->ki_filp; 555 loff_t pos = iocb->ki_pos; 556 enum ORANGEFS_io_type type = iov_iter_rw(iter) == WRITE ? 557 ORANGEFS_IO_WRITE : ORANGEFS_IO_READ; 558 loff_t *offset = &pos; 559 struct inode *inode = file->f_mapping->host; 560 struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode); 561 struct orangefs_khandle *handle = &orangefs_inode->refn.khandle; 562 size_t count = iov_iter_count(iter); 563 ssize_t total_count = 0; 564 ssize_t ret = -EINVAL; 565 int i = 0; 566 567 gossip_debug(GOSSIP_FILE_DEBUG, 568 "%s-BEGIN(%pU): count(%d) after estimate_max_iovecs.\n", 569 __func__, 570 handle, 571 (int)count); 572 573 if (type == ORANGEFS_IO_WRITE) { 574 gossip_debug(GOSSIP_FILE_DEBUG, 575 "%s(%pU): proceeding with offset : %llu, " 576 "size %d\n", 577 __func__, 578 handle, 579 llu(*offset), 580 (int)count); 581 } 582 583 if (count == 0) { 584 ret = 0; 585 goto out; 586 } 587 588 while (iov_iter_count(iter)) { 589 size_t each_count = iov_iter_count(iter); 590 size_t amt_complete; 591 i++; 592 593 /* how much to transfer in this loop iteration */ 594 if (each_count > orangefs_bufmap_size_query()) 595 each_count = orangefs_bufmap_size_query(); 596 597 gossip_debug(GOSSIP_FILE_DEBUG, 598 "%s(%pU): size of each_count(%d)\n", 599 __func__, 600 handle, 601 (int)each_count); 602 gossip_debug(GOSSIP_FILE_DEBUG, 603 "%s(%pU): BEFORE wait_for_io: offset is %d\n", 604 __func__, 605 handle, 606 (int)*offset); 607 608 ret = wait_for_direct_io(type, inode, offset, iter, 609 each_count, 0, NULL, NULL, file); 610 gossip_debug(GOSSIP_FILE_DEBUG, 611 "%s(%pU): return from wait_for_io:%d\n", 612 __func__, 613 handle, 614 (int)ret); 615 616 if (ret < 0) 617 goto out; 618 619 *offset += ret; 620 total_count += ret; 621 amt_complete = ret; 622 623 gossip_debug(GOSSIP_FILE_DEBUG, 624 "%s(%pU): AFTER wait_for_io: offset is %d\n", 625 __func__, 626 handle, 627 (int)*offset); 628 629 /* 630 * if we got a short I/O operations, 631 * fall out and return what we got so far 632 */ 633 if (amt_complete < each_count) 634 break; 635 } /*end while */ 636 637 out: 638 if (total_count > 0) 639 ret = total_count; 640 if (ret > 0) { 641 if (type == ORANGEFS_IO_READ) { 642 file_accessed(file); 643 } else { 644 file_update_time(file); 645 if (*offset > i_size_read(inode)) 646 i_size_write(inode, *offset); 647 } 648 } 649 650 gossip_debug(GOSSIP_FILE_DEBUG, 651 "%s(%pU): Value(%d) returned.\n", 652 __func__, 653 handle, 654 (int)ret); 655 656 return ret; 657 } 658 659 /** ORANGEFS2 implementation of address space operations */ 660 static const struct address_space_operations orangefs_address_operations = { 661 .writepage = orangefs_writepage, 662 .readpage = orangefs_readpage, 663 .writepages = orangefs_writepages, 664 .set_page_dirty = __set_page_dirty_nobuffers, 665 .write_begin = orangefs_write_begin, 666 .write_end = orangefs_write_end, 667 .invalidatepage = orangefs_invalidatepage, 668 .releasepage = orangefs_releasepage, 669 .freepage = orangefs_freepage, 670 .launder_page = orangefs_launder_page, 671 .direct_IO = orangefs_direct_IO, 672 }; 673 674 vm_fault_t orangefs_page_mkwrite(struct vm_fault *vmf) 675 { 676 struct page *page = vmf->page; 677 struct inode *inode = file_inode(vmf->vma->vm_file); 678 struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode); 679 unsigned long *bitlock = &orangefs_inode->bitlock; 680 vm_fault_t ret; 681 struct orangefs_write_range *wr; 682 683 sb_start_pagefault(inode->i_sb); 684 685 if (wait_on_bit(bitlock, 1, TASK_KILLABLE)) { 686 ret = VM_FAULT_RETRY; 687 goto out; 688 } 689 690 lock_page(page); 691 if (PageDirty(page) && !PagePrivate(page)) { 692 /* 693 * Should be impossible. If it happens, launder the page 694 * since we don't know what's dirty. This will WARN in 695 * orangefs_writepage_locked. 696 */ 697 if (orangefs_launder_page(page)) { 698 ret = VM_FAULT_LOCKED|VM_FAULT_RETRY; 699 goto out; 700 } 701 } 702 if (PagePrivate(page)) { 703 wr = (struct orangefs_write_range *)page_private(page); 704 if (uid_eq(wr->uid, current_fsuid()) && 705 gid_eq(wr->gid, current_fsgid())) { 706 wr->pos = page_offset(page); 707 wr->len = PAGE_SIZE; 708 goto okay; 709 } else { 710 if (orangefs_launder_page(page)) { 711 ret = VM_FAULT_LOCKED|VM_FAULT_RETRY; 712 goto out; 713 } 714 } 715 } 716 wr = kmalloc(sizeof *wr, GFP_KERNEL); 717 if (!wr) { 718 ret = VM_FAULT_LOCKED|VM_FAULT_RETRY; 719 goto out; 720 } 721 wr->pos = page_offset(page); 722 wr->len = PAGE_SIZE; 723 wr->uid = current_fsuid(); 724 wr->gid = current_fsgid(); 725 attach_page_private(page, wr); 726 okay: 727 728 file_update_time(vmf->vma->vm_file); 729 if (page->mapping != inode->i_mapping) { 730 unlock_page(page); 731 ret = VM_FAULT_LOCKED|VM_FAULT_NOPAGE; 732 goto out; 733 } 734 735 /* 736 * We mark the page dirty already here so that when freeze is in 737 * progress, we are guaranteed that writeback during freezing will 738 * see the dirty page and writeprotect it again. 739 */ 740 set_page_dirty(page); 741 wait_for_stable_page(page); 742 ret = VM_FAULT_LOCKED; 743 out: 744 sb_end_pagefault(inode->i_sb); 745 return ret; 746 } 747 748 static int orangefs_setattr_size(struct inode *inode, struct iattr *iattr) 749 { 750 struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode); 751 struct orangefs_kernel_op_s *new_op; 752 loff_t orig_size; 753 int ret = -EINVAL; 754 755 gossip_debug(GOSSIP_INODE_DEBUG, 756 "%s: %pU: Handle is %pU | fs_id %d | size is %llu\n", 757 __func__, 758 get_khandle_from_ino(inode), 759 &orangefs_inode->refn.khandle, 760 orangefs_inode->refn.fs_id, 761 iattr->ia_size); 762 763 /* Ensure that we have a up to date size, so we know if it changed. */ 764 ret = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_SIZE); 765 if (ret == -ESTALE) 766 ret = -EIO; 767 if (ret) { 768 gossip_err("%s: orangefs_inode_getattr failed, ret:%d:.\n", 769 __func__, ret); 770 return ret; 771 } 772 orig_size = i_size_read(inode); 773 774 /* This is truncate_setsize in a different order. */ 775 truncate_pagecache(inode, iattr->ia_size); 776 i_size_write(inode, iattr->ia_size); 777 if (iattr->ia_size > orig_size) 778 pagecache_isize_extended(inode, orig_size, iattr->ia_size); 779 780 new_op = op_alloc(ORANGEFS_VFS_OP_TRUNCATE); 781 if (!new_op) 782 return -ENOMEM; 783 784 new_op->upcall.req.truncate.refn = orangefs_inode->refn; 785 new_op->upcall.req.truncate.size = (__s64) iattr->ia_size; 786 787 ret = service_operation(new_op, 788 __func__, 789 get_interruptible_flag(inode)); 790 791 /* 792 * the truncate has no downcall members to retrieve, but 793 * the status value tells us if it went through ok or not 794 */ 795 gossip_debug(GOSSIP_INODE_DEBUG, "%s: ret:%d:\n", __func__, ret); 796 797 op_release(new_op); 798 799 if (ret != 0) 800 return ret; 801 802 if (orig_size != i_size_read(inode)) 803 iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME; 804 805 return ret; 806 } 807 808 int __orangefs_setattr(struct inode *inode, struct iattr *iattr) 809 { 810 int ret; 811 812 if (iattr->ia_valid & ATTR_MODE) { 813 if (iattr->ia_mode & (S_ISVTX)) { 814 if (is_root_handle(inode)) { 815 /* 816 * allow sticky bit to be set on root (since 817 * it shows up that way by default anyhow), 818 * but don't show it to the server 819 */ 820 iattr->ia_mode -= S_ISVTX; 821 } else { 822 gossip_debug(GOSSIP_UTILS_DEBUG, 823 "User attempted to set sticky bit on non-root directory; returning EINVAL.\n"); 824 ret = -EINVAL; 825 goto out; 826 } 827 } 828 if (iattr->ia_mode & (S_ISUID)) { 829 gossip_debug(GOSSIP_UTILS_DEBUG, 830 "Attempting to set setuid bit (not supported); returning EINVAL.\n"); 831 ret = -EINVAL; 832 goto out; 833 } 834 } 835 836 if (iattr->ia_valid & ATTR_SIZE) { 837 ret = orangefs_setattr_size(inode, iattr); 838 if (ret) 839 goto out; 840 } 841 842 again: 843 spin_lock(&inode->i_lock); 844 if (ORANGEFS_I(inode)->attr_valid) { 845 if (uid_eq(ORANGEFS_I(inode)->attr_uid, current_fsuid()) && 846 gid_eq(ORANGEFS_I(inode)->attr_gid, current_fsgid())) { 847 ORANGEFS_I(inode)->attr_valid = iattr->ia_valid; 848 } else { 849 spin_unlock(&inode->i_lock); 850 write_inode_now(inode, 1); 851 goto again; 852 } 853 } else { 854 ORANGEFS_I(inode)->attr_valid = iattr->ia_valid; 855 ORANGEFS_I(inode)->attr_uid = current_fsuid(); 856 ORANGEFS_I(inode)->attr_gid = current_fsgid(); 857 } 858 setattr_copy(inode, iattr); 859 spin_unlock(&inode->i_lock); 860 mark_inode_dirty(inode); 861 862 if (iattr->ia_valid & ATTR_MODE) 863 /* change mod on a file that has ACLs */ 864 ret = posix_acl_chmod(inode, inode->i_mode); 865 866 ret = 0; 867 out: 868 return ret; 869 } 870 871 /* 872 * Change attributes of an object referenced by dentry. 873 */ 874 int orangefs_setattr(struct dentry *dentry, struct iattr *iattr) 875 { 876 int ret; 877 gossip_debug(GOSSIP_INODE_DEBUG, "__orangefs_setattr: called on %pd\n", 878 dentry); 879 ret = setattr_prepare(dentry, iattr); 880 if (ret) 881 goto out; 882 ret = __orangefs_setattr(d_inode(dentry), iattr); 883 sync_inode_metadata(d_inode(dentry), 1); 884 out: 885 gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_setattr: returning %d\n", 886 ret); 887 return ret; 888 } 889 890 /* 891 * Obtain attributes of an object given a dentry 892 */ 893 int orangefs_getattr(const struct path *path, struct kstat *stat, 894 u32 request_mask, unsigned int flags) 895 { 896 int ret; 897 struct inode *inode = path->dentry->d_inode; 898 899 gossip_debug(GOSSIP_INODE_DEBUG, 900 "orangefs_getattr: called on %pd mask %u\n", 901 path->dentry, request_mask); 902 903 ret = orangefs_inode_getattr(inode, 904 request_mask & STATX_SIZE ? ORANGEFS_GETATTR_SIZE : 0); 905 if (ret == 0) { 906 generic_fillattr(inode, stat); 907 908 /* override block size reported to stat */ 909 if (!(request_mask & STATX_SIZE)) 910 stat->result_mask &= ~STATX_SIZE; 911 912 stat->attributes_mask = STATX_ATTR_IMMUTABLE | 913 STATX_ATTR_APPEND; 914 if (inode->i_flags & S_IMMUTABLE) 915 stat->attributes |= STATX_ATTR_IMMUTABLE; 916 if (inode->i_flags & S_APPEND) 917 stat->attributes |= STATX_ATTR_APPEND; 918 } 919 return ret; 920 } 921 922 int orangefs_permission(struct inode *inode, int mask) 923 { 924 int ret; 925 926 if (mask & MAY_NOT_BLOCK) 927 return -ECHILD; 928 929 gossip_debug(GOSSIP_INODE_DEBUG, "%s: refreshing\n", __func__); 930 931 /* Make sure the permission (and other common attrs) are up to date. */ 932 ret = orangefs_inode_getattr(inode, 0); 933 if (ret < 0) 934 return ret; 935 936 return generic_permission(inode, mask); 937 } 938 939 int orangefs_update_time(struct inode *inode, struct timespec64 *time, int flags) 940 { 941 struct iattr iattr; 942 gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_update_time: %pU\n", 943 get_khandle_from_ino(inode)); 944 generic_update_time(inode, time, flags); 945 memset(&iattr, 0, sizeof iattr); 946 if (flags & S_ATIME) 947 iattr.ia_valid |= ATTR_ATIME; 948 if (flags & S_CTIME) 949 iattr.ia_valid |= ATTR_CTIME; 950 if (flags & S_MTIME) 951 iattr.ia_valid |= ATTR_MTIME; 952 return __orangefs_setattr(inode, &iattr); 953 } 954 955 /* ORANGEFS2 implementation of VFS inode operations for files */ 956 static const struct inode_operations orangefs_file_inode_operations = { 957 .get_acl = orangefs_get_acl, 958 .set_acl = orangefs_set_acl, 959 .setattr = orangefs_setattr, 960 .getattr = orangefs_getattr, 961 .listxattr = orangefs_listxattr, 962 .permission = orangefs_permission, 963 .update_time = orangefs_update_time, 964 }; 965 966 static int orangefs_init_iops(struct inode *inode) 967 { 968 inode->i_mapping->a_ops = &orangefs_address_operations; 969 970 switch (inode->i_mode & S_IFMT) { 971 case S_IFREG: 972 inode->i_op = &orangefs_file_inode_operations; 973 inode->i_fop = &orangefs_file_operations; 974 break; 975 case S_IFLNK: 976 inode->i_op = &orangefs_symlink_inode_operations; 977 break; 978 case S_IFDIR: 979 inode->i_op = &orangefs_dir_inode_operations; 980 inode->i_fop = &orangefs_dir_operations; 981 break; 982 default: 983 gossip_debug(GOSSIP_INODE_DEBUG, 984 "%s: unsupported mode\n", 985 __func__); 986 return -EINVAL; 987 } 988 989 return 0; 990 } 991 992 /* 993 * Given an ORANGEFS object identifier (fsid, handle), convert it into 994 * a ino_t type that will be used as a hash-index from where the handle will 995 * be searched for in the VFS hash table of inodes. 996 */ 997 static inline ino_t orangefs_handle_hash(struct orangefs_object_kref *ref) 998 { 999 if (!ref) 1000 return 0; 1001 return orangefs_khandle_to_ino(&(ref->khandle)); 1002 } 1003 1004 /* 1005 * Called to set up an inode from iget5_locked. 1006 */ 1007 static int orangefs_set_inode(struct inode *inode, void *data) 1008 { 1009 struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data; 1010 ORANGEFS_I(inode)->refn.fs_id = ref->fs_id; 1011 ORANGEFS_I(inode)->refn.khandle = ref->khandle; 1012 ORANGEFS_I(inode)->attr_valid = 0; 1013 hash_init(ORANGEFS_I(inode)->xattr_cache); 1014 ORANGEFS_I(inode)->mapping_time = jiffies - 1; 1015 ORANGEFS_I(inode)->bitlock = 0; 1016 return 0; 1017 } 1018 1019 /* 1020 * Called to determine if handles match. 1021 */ 1022 static int orangefs_test_inode(struct inode *inode, void *data) 1023 { 1024 struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data; 1025 struct orangefs_inode_s *orangefs_inode = NULL; 1026 1027 orangefs_inode = ORANGEFS_I(inode); 1028 /* test handles and fs_ids... */ 1029 return (!ORANGEFS_khandle_cmp(&(orangefs_inode->refn.khandle), 1030 &(ref->khandle)) && 1031 orangefs_inode->refn.fs_id == ref->fs_id); 1032 } 1033 1034 /* 1035 * Front-end to lookup the inode-cache maintained by the VFS using the ORANGEFS 1036 * file handle. 1037 * 1038 * @sb: the file system super block instance. 1039 * @ref: The ORANGEFS object for which we are trying to locate an inode. 1040 */ 1041 struct inode *orangefs_iget(struct super_block *sb, 1042 struct orangefs_object_kref *ref) 1043 { 1044 struct inode *inode = NULL; 1045 unsigned long hash; 1046 int error; 1047 1048 hash = orangefs_handle_hash(ref); 1049 inode = iget5_locked(sb, 1050 hash, 1051 orangefs_test_inode, 1052 orangefs_set_inode, 1053 ref); 1054 1055 if (!inode) 1056 return ERR_PTR(-ENOMEM); 1057 1058 if (!(inode->i_state & I_NEW)) 1059 return inode; 1060 1061 error = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_NEW); 1062 if (error) { 1063 iget_failed(inode); 1064 return ERR_PTR(error); 1065 } 1066 1067 inode->i_ino = hash; /* needed for stat etc */ 1068 orangefs_init_iops(inode); 1069 unlock_new_inode(inode); 1070 1071 gossip_debug(GOSSIP_INODE_DEBUG, 1072 "iget handle %pU, fsid %d hash %ld i_ino %lu\n", 1073 &ref->khandle, 1074 ref->fs_id, 1075 hash, 1076 inode->i_ino); 1077 1078 return inode; 1079 } 1080 1081 /* 1082 * Allocate an inode for a newly created file and insert it into the inode hash. 1083 */ 1084 struct inode *orangefs_new_inode(struct super_block *sb, struct inode *dir, 1085 int mode, dev_t dev, struct orangefs_object_kref *ref) 1086 { 1087 unsigned long hash = orangefs_handle_hash(ref); 1088 struct inode *inode; 1089 int error; 1090 1091 gossip_debug(GOSSIP_INODE_DEBUG, 1092 "%s:(sb is %p | MAJOR(dev)=%u | MINOR(dev)=%u mode=%o)\n", 1093 __func__, 1094 sb, 1095 MAJOR(dev), 1096 MINOR(dev), 1097 mode); 1098 1099 inode = new_inode(sb); 1100 if (!inode) 1101 return ERR_PTR(-ENOMEM); 1102 1103 orangefs_set_inode(inode, ref); 1104 inode->i_ino = hash; /* needed for stat etc */ 1105 1106 error = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_NEW); 1107 if (error) 1108 goto out_iput; 1109 1110 orangefs_init_iops(inode); 1111 inode->i_rdev = dev; 1112 1113 error = insert_inode_locked4(inode, hash, orangefs_test_inode, ref); 1114 if (error < 0) 1115 goto out_iput; 1116 1117 gossip_debug(GOSSIP_INODE_DEBUG, 1118 "Initializing ACL's for inode %pU\n", 1119 get_khandle_from_ino(inode)); 1120 orangefs_init_acl(inode, dir); 1121 return inode; 1122 1123 out_iput: 1124 iput(inode); 1125 return ERR_PTR(error); 1126 } 1127