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 <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_invalidatepage. */ 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_page(struct page *); 247 248 static void orangefs_readahead(struct readahead_control *rac) 249 { 250 loff_t offset; 251 struct iov_iter iter; 252 struct file *file = rac->file; 253 struct inode *inode = file->f_mapping->host; 254 struct xarray *i_pages; 255 struct page *page; 256 loff_t new_start = readahead_pos(rac); 257 int ret; 258 size_t new_len = 0; 259 260 loff_t bytes_remaining = inode->i_size - readahead_pos(rac); 261 loff_t pages_remaining = bytes_remaining / PAGE_SIZE; 262 263 if (pages_remaining >= 1024) 264 new_len = 4194304; 265 else if (pages_remaining > readahead_count(rac)) 266 new_len = bytes_remaining; 267 268 if (new_len) 269 readahead_expand(rac, new_start, new_len); 270 271 offset = readahead_pos(rac); 272 i_pages = &file->f_mapping->i_pages; 273 274 iov_iter_xarray(&iter, READ, i_pages, offset, readahead_length(rac)); 275 276 /* read in the pages. */ 277 if ((ret = wait_for_direct_io(ORANGEFS_IO_READ, inode, 278 &offset, &iter, readahead_length(rac), 279 inode->i_size, NULL, NULL, file)) < 0) 280 gossip_debug(GOSSIP_FILE_DEBUG, 281 "%s: wait_for_direct_io failed. \n", __func__); 282 else 283 ret = 0; 284 285 /* clean up. */ 286 while ((page = readahead_page(rac))) { 287 page_endio(page, false, ret); 288 put_page(page); 289 } 290 } 291 292 static int orangefs_readpage(struct file *file, struct page *page) 293 { 294 struct inode *inode = page->mapping->host; 295 struct iov_iter iter; 296 struct bio_vec bv; 297 ssize_t ret; 298 loff_t off; /* offset into this page */ 299 300 if (PageDirty(page)) 301 orangefs_launder_page(page); 302 303 off = page_offset(page); 304 bv.bv_page = page; 305 bv.bv_len = PAGE_SIZE; 306 bv.bv_offset = 0; 307 iov_iter_bvec(&iter, READ, &bv, 1, PAGE_SIZE); 308 309 ret = wait_for_direct_io(ORANGEFS_IO_READ, inode, &off, &iter, 310 PAGE_SIZE, inode->i_size, NULL, NULL, file); 311 /* this will only zero remaining unread portions of the page data */ 312 iov_iter_zero(~0U, &iter); 313 /* takes care of potential aliasing */ 314 flush_dcache_page(page); 315 if (ret < 0) { 316 SetPageError(page); 317 } else { 318 SetPageUptodate(page); 319 if (PageError(page)) 320 ClearPageError(page); 321 ret = 0; 322 } 323 /* unlock the page after the ->readpage() routine completes */ 324 unlock_page(page); 325 return ret; 326 } 327 328 static int orangefs_write_begin(struct file *file, 329 struct address_space *mapping, 330 loff_t pos, unsigned len, unsigned flags, struct page **pagep, 331 void **fsdata) 332 { 333 struct orangefs_write_range *wr; 334 struct page *page; 335 pgoff_t index; 336 int ret; 337 338 index = pos >> PAGE_SHIFT; 339 340 page = grab_cache_page_write_begin(mapping, index, flags); 341 if (!page) 342 return -ENOMEM; 343 344 *pagep = page; 345 346 if (PageDirty(page) && !PagePrivate(page)) { 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_page(page); 353 if (ret) 354 return ret; 355 } 356 if (PagePrivate(page)) { 357 struct orangefs_write_range *wr; 358 wr = (struct orangefs_write_range *)page_private(page); 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_page(page); 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 attach_page_private(page, 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_invalidatepage(struct page *page, 420 unsigned int offset, 421 unsigned int length) 422 { 423 struct orangefs_write_range *wr; 424 wr = (struct orangefs_write_range *)page_private(page); 425 426 if (offset == 0 && length == PAGE_SIZE) { 427 kfree(detach_page_private(page)); 428 return; 429 /* write range entirely within invalidate range (or equal) */ 430 } else if (page_offset(page) + offset <= wr->pos && 431 wr->pos + wr->len <= page_offset(page) + offset + length) { 432 kfree(detach_page_private(page)); 433 /* XXX is this right? only caller in fs */ 434 cancel_dirty_page(page); 435 return; 436 /* invalidate range chops off end of write range */ 437 } else if (wr->pos < page_offset(page) + offset && 438 wr->pos + wr->len <= page_offset(page) + offset + length && 439 page_offset(page) + offset < wr->pos + wr->len) { 440 size_t x; 441 x = wr->pos + wr->len - (page_offset(page) + offset); 442 WARN_ON(x > wr->len); 443 wr->len -= x; 444 wr->uid = current_fsuid(); 445 wr->gid = current_fsgid(); 446 /* invalidate range chops off beginning of write range */ 447 } else if (page_offset(page) + offset <= wr->pos && 448 page_offset(page) + offset + length < wr->pos + wr->len && 449 wr->pos < page_offset(page) + offset + length) { 450 size_t x; 451 x = page_offset(page) + offset + length - wr->pos; 452 WARN_ON(x > wr->len); 453 wr->pos += x; 454 wr->len -= x; 455 wr->uid = current_fsuid(); 456 wr->gid = current_fsgid(); 457 /* invalidate range entirely within write range (punch hole) */ 458 } else if (wr->pos < page_offset(page) + offset && 459 page_offset(page) + offset + length < wr->pos + wr->len) { 460 /* XXX what do we do here... should not WARN_ON */ 461 WARN_ON(1); 462 /* punch hole */ 463 /* 464 * should we just ignore this and write it out anyway? 465 * it hardly makes sense 466 */ 467 return; 468 /* non-overlapping ranges */ 469 } else { 470 /* WARN if they do overlap */ 471 if (!((page_offset(page) + offset + length <= wr->pos) ^ 472 (wr->pos + wr->len <= page_offset(page) + offset))) { 473 WARN_ON(1); 474 printk("invalidate range offset %llu length %u\n", 475 page_offset(page) + offset, length); 476 printk("write range offset %llu length %zu\n", 477 wr->pos, wr->len); 478 } 479 return; 480 } 481 482 /* 483 * Above there are returns where wr is freed or where we WARN. 484 * Thus the following runs if wr was modified above. 485 */ 486 487 orangefs_launder_page(page); 488 } 489 490 static int orangefs_releasepage(struct page *page, gfp_t foo) 491 { 492 return !PagePrivate(page); 493 } 494 495 static void orangefs_freepage(struct page *page) 496 { 497 kfree(detach_page_private(page)); 498 } 499 500 static int orangefs_launder_page(struct page *page) 501 { 502 int r = 0; 503 struct writeback_control wbc = { 504 .sync_mode = WB_SYNC_ALL, 505 .nr_to_write = 0, 506 }; 507 wait_on_page_writeback(page); 508 if (clear_page_dirty_for_io(page)) { 509 r = orangefs_writepage_locked(page, &wbc); 510 end_page_writeback(page); 511 } 512 return r; 513 } 514 515 static ssize_t orangefs_direct_IO(struct kiocb *iocb, 516 struct iov_iter *iter) 517 { 518 /* 519 * Comment from original do_readv_writev: 520 * Common entry point for read/write/readv/writev 521 * This function will dispatch it to either the direct I/O 522 * or buffered I/O path depending on the mount options and/or 523 * augmented/extended metadata attached to the file. 524 * Note: File extended attributes override any mount options. 525 */ 526 struct file *file = iocb->ki_filp; 527 loff_t pos = iocb->ki_pos; 528 enum ORANGEFS_io_type type = iov_iter_rw(iter) == WRITE ? 529 ORANGEFS_IO_WRITE : ORANGEFS_IO_READ; 530 loff_t *offset = &pos; 531 struct inode *inode = file->f_mapping->host; 532 struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode); 533 struct orangefs_khandle *handle = &orangefs_inode->refn.khandle; 534 size_t count = iov_iter_count(iter); 535 ssize_t total_count = 0; 536 ssize_t ret = -EINVAL; 537 int i = 0; 538 539 gossip_debug(GOSSIP_FILE_DEBUG, 540 "%s-BEGIN(%pU): count(%d) after estimate_max_iovecs.\n", 541 __func__, 542 handle, 543 (int)count); 544 545 if (type == ORANGEFS_IO_WRITE) { 546 gossip_debug(GOSSIP_FILE_DEBUG, 547 "%s(%pU): proceeding with offset : %llu, " 548 "size %d\n", 549 __func__, 550 handle, 551 llu(*offset), 552 (int)count); 553 } 554 555 if (count == 0) { 556 ret = 0; 557 goto out; 558 } 559 560 while (iov_iter_count(iter)) { 561 size_t each_count = iov_iter_count(iter); 562 size_t amt_complete; 563 i++; 564 565 /* how much to transfer in this loop iteration */ 566 if (each_count > orangefs_bufmap_size_query()) 567 each_count = orangefs_bufmap_size_query(); 568 569 gossip_debug(GOSSIP_FILE_DEBUG, 570 "%s(%pU): size of each_count(%d)\n", 571 __func__, 572 handle, 573 (int)each_count); 574 gossip_debug(GOSSIP_FILE_DEBUG, 575 "%s(%pU): BEFORE wait_for_io: offset is %d\n", 576 __func__, 577 handle, 578 (int)*offset); 579 580 ret = wait_for_direct_io(type, inode, offset, iter, 581 each_count, 0, NULL, NULL, file); 582 gossip_debug(GOSSIP_FILE_DEBUG, 583 "%s(%pU): return from wait_for_io:%d\n", 584 __func__, 585 handle, 586 (int)ret); 587 588 if (ret < 0) 589 goto out; 590 591 *offset += ret; 592 total_count += ret; 593 amt_complete = ret; 594 595 gossip_debug(GOSSIP_FILE_DEBUG, 596 "%s(%pU): AFTER wait_for_io: offset is %d\n", 597 __func__, 598 handle, 599 (int)*offset); 600 601 /* 602 * if we got a short I/O operations, 603 * fall out and return what we got so far 604 */ 605 if (amt_complete < each_count) 606 break; 607 } /*end while */ 608 609 out: 610 if (total_count > 0) 611 ret = total_count; 612 if (ret > 0) { 613 if (type == ORANGEFS_IO_READ) { 614 file_accessed(file); 615 } else { 616 file_update_time(file); 617 if (*offset > i_size_read(inode)) 618 i_size_write(inode, *offset); 619 } 620 } 621 622 gossip_debug(GOSSIP_FILE_DEBUG, 623 "%s(%pU): Value(%d) returned.\n", 624 __func__, 625 handle, 626 (int)ret); 627 628 return ret; 629 } 630 631 /** ORANGEFS2 implementation of address space operations */ 632 static const struct address_space_operations orangefs_address_operations = { 633 .writepage = orangefs_writepage, 634 .readahead = orangefs_readahead, 635 .readpage = orangefs_readpage, 636 .writepages = orangefs_writepages, 637 .set_page_dirty = __set_page_dirty_nobuffers, 638 .write_begin = orangefs_write_begin, 639 .write_end = orangefs_write_end, 640 .invalidatepage = orangefs_invalidatepage, 641 .releasepage = orangefs_releasepage, 642 .freepage = orangefs_freepage, 643 .launder_page = orangefs_launder_page, 644 .direct_IO = orangefs_direct_IO, 645 }; 646 647 vm_fault_t orangefs_page_mkwrite(struct vm_fault *vmf) 648 { 649 struct page *page = vmf->page; 650 struct inode *inode = file_inode(vmf->vma->vm_file); 651 struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode); 652 unsigned long *bitlock = &orangefs_inode->bitlock; 653 vm_fault_t ret; 654 struct orangefs_write_range *wr; 655 656 sb_start_pagefault(inode->i_sb); 657 658 if (wait_on_bit(bitlock, 1, TASK_KILLABLE)) { 659 ret = VM_FAULT_RETRY; 660 goto out; 661 } 662 663 lock_page(page); 664 if (PageDirty(page) && !PagePrivate(page)) { 665 /* 666 * Should be impossible. If it happens, launder the page 667 * since we don't know what's dirty. This will WARN in 668 * orangefs_writepage_locked. 669 */ 670 if (orangefs_launder_page(page)) { 671 ret = VM_FAULT_LOCKED|VM_FAULT_RETRY; 672 goto out; 673 } 674 } 675 if (PagePrivate(page)) { 676 wr = (struct orangefs_write_range *)page_private(page); 677 if (uid_eq(wr->uid, current_fsuid()) && 678 gid_eq(wr->gid, current_fsgid())) { 679 wr->pos = page_offset(page); 680 wr->len = PAGE_SIZE; 681 goto okay; 682 } else { 683 if (orangefs_launder_page(page)) { 684 ret = VM_FAULT_LOCKED|VM_FAULT_RETRY; 685 goto out; 686 } 687 } 688 } 689 wr = kmalloc(sizeof *wr, GFP_KERNEL); 690 if (!wr) { 691 ret = VM_FAULT_LOCKED|VM_FAULT_RETRY; 692 goto out; 693 } 694 wr->pos = page_offset(page); 695 wr->len = PAGE_SIZE; 696 wr->uid = current_fsuid(); 697 wr->gid = current_fsgid(); 698 attach_page_private(page, wr); 699 okay: 700 701 file_update_time(vmf->vma->vm_file); 702 if (page->mapping != inode->i_mapping) { 703 unlock_page(page); 704 ret = VM_FAULT_LOCKED|VM_FAULT_NOPAGE; 705 goto out; 706 } 707 708 /* 709 * We mark the page dirty already here so that when freeze is in 710 * progress, we are guaranteed that writeback during freezing will 711 * see the dirty page and writeprotect it again. 712 */ 713 set_page_dirty(page); 714 wait_for_stable_page(page); 715 ret = VM_FAULT_LOCKED; 716 out: 717 sb_end_pagefault(inode->i_sb); 718 return ret; 719 } 720 721 static int orangefs_setattr_size(struct inode *inode, struct iattr *iattr) 722 { 723 struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode); 724 struct orangefs_kernel_op_s *new_op; 725 loff_t orig_size; 726 int ret = -EINVAL; 727 728 gossip_debug(GOSSIP_INODE_DEBUG, 729 "%s: %pU: Handle is %pU | fs_id %d | size is %llu\n", 730 __func__, 731 get_khandle_from_ino(inode), 732 &orangefs_inode->refn.khandle, 733 orangefs_inode->refn.fs_id, 734 iattr->ia_size); 735 736 /* Ensure that we have a up to date size, so we know if it changed. */ 737 ret = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_SIZE); 738 if (ret == -ESTALE) 739 ret = -EIO; 740 if (ret) { 741 gossip_err("%s: orangefs_inode_getattr failed, ret:%d:.\n", 742 __func__, ret); 743 return ret; 744 } 745 orig_size = i_size_read(inode); 746 747 /* This is truncate_setsize in a different order. */ 748 truncate_pagecache(inode, iattr->ia_size); 749 i_size_write(inode, iattr->ia_size); 750 if (iattr->ia_size > orig_size) 751 pagecache_isize_extended(inode, orig_size, iattr->ia_size); 752 753 new_op = op_alloc(ORANGEFS_VFS_OP_TRUNCATE); 754 if (!new_op) 755 return -ENOMEM; 756 757 new_op->upcall.req.truncate.refn = orangefs_inode->refn; 758 new_op->upcall.req.truncate.size = (__s64) iattr->ia_size; 759 760 ret = service_operation(new_op, 761 __func__, 762 get_interruptible_flag(inode)); 763 764 /* 765 * the truncate has no downcall members to retrieve, but 766 * the status value tells us if it went through ok or not 767 */ 768 gossip_debug(GOSSIP_INODE_DEBUG, "%s: ret:%d:\n", __func__, ret); 769 770 op_release(new_op); 771 772 if (ret != 0) 773 return ret; 774 775 if (orig_size != i_size_read(inode)) 776 iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME; 777 778 return ret; 779 } 780 781 int __orangefs_setattr(struct inode *inode, struct iattr *iattr) 782 { 783 int ret; 784 785 if (iattr->ia_valid & ATTR_MODE) { 786 if (iattr->ia_mode & (S_ISVTX)) { 787 if (is_root_handle(inode)) { 788 /* 789 * allow sticky bit to be set on root (since 790 * it shows up that way by default anyhow), 791 * but don't show it to the server 792 */ 793 iattr->ia_mode -= S_ISVTX; 794 } else { 795 gossip_debug(GOSSIP_UTILS_DEBUG, 796 "User attempted to set sticky bit on non-root directory; returning EINVAL.\n"); 797 ret = -EINVAL; 798 goto out; 799 } 800 } 801 if (iattr->ia_mode & (S_ISUID)) { 802 gossip_debug(GOSSIP_UTILS_DEBUG, 803 "Attempting to set setuid bit (not supported); returning EINVAL.\n"); 804 ret = -EINVAL; 805 goto out; 806 } 807 } 808 809 if (iattr->ia_valid & ATTR_SIZE) { 810 ret = orangefs_setattr_size(inode, iattr); 811 if (ret) 812 goto out; 813 } 814 815 again: 816 spin_lock(&inode->i_lock); 817 if (ORANGEFS_I(inode)->attr_valid) { 818 if (uid_eq(ORANGEFS_I(inode)->attr_uid, current_fsuid()) && 819 gid_eq(ORANGEFS_I(inode)->attr_gid, current_fsgid())) { 820 ORANGEFS_I(inode)->attr_valid = iattr->ia_valid; 821 } else { 822 spin_unlock(&inode->i_lock); 823 write_inode_now(inode, 1); 824 goto again; 825 } 826 } else { 827 ORANGEFS_I(inode)->attr_valid = iattr->ia_valid; 828 ORANGEFS_I(inode)->attr_uid = current_fsuid(); 829 ORANGEFS_I(inode)->attr_gid = current_fsgid(); 830 } 831 setattr_copy(&init_user_ns, inode, iattr); 832 spin_unlock(&inode->i_lock); 833 mark_inode_dirty(inode); 834 835 if (iattr->ia_valid & ATTR_MODE) 836 /* change mod on a file that has ACLs */ 837 ret = posix_acl_chmod(&init_user_ns, inode, inode->i_mode); 838 839 ret = 0; 840 out: 841 return ret; 842 } 843 844 /* 845 * Change attributes of an object referenced by dentry. 846 */ 847 int orangefs_setattr(struct user_namespace *mnt_userns, struct dentry *dentry, 848 struct iattr *iattr) 849 { 850 int ret; 851 gossip_debug(GOSSIP_INODE_DEBUG, "__orangefs_setattr: called on %pd\n", 852 dentry); 853 ret = setattr_prepare(&init_user_ns, dentry, iattr); 854 if (ret) 855 goto out; 856 ret = __orangefs_setattr(d_inode(dentry), iattr); 857 sync_inode_metadata(d_inode(dentry), 1); 858 out: 859 gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_setattr: returning %d\n", 860 ret); 861 return ret; 862 } 863 864 /* 865 * Obtain attributes of an object given a dentry 866 */ 867 int orangefs_getattr(struct user_namespace *mnt_userns, const struct path *path, 868 struct kstat *stat, u32 request_mask, unsigned int flags) 869 { 870 int ret; 871 struct inode *inode = path->dentry->d_inode; 872 873 gossip_debug(GOSSIP_INODE_DEBUG, 874 "orangefs_getattr: called on %pd mask %u\n", 875 path->dentry, request_mask); 876 877 ret = orangefs_inode_getattr(inode, 878 request_mask & STATX_SIZE ? ORANGEFS_GETATTR_SIZE : 0); 879 if (ret == 0) { 880 generic_fillattr(&init_user_ns, inode, stat); 881 882 /* override block size reported to stat */ 883 if (!(request_mask & STATX_SIZE)) 884 stat->result_mask &= ~STATX_SIZE; 885 886 stat->attributes_mask = STATX_ATTR_IMMUTABLE | 887 STATX_ATTR_APPEND; 888 if (inode->i_flags & S_IMMUTABLE) 889 stat->attributes |= STATX_ATTR_IMMUTABLE; 890 if (inode->i_flags & S_APPEND) 891 stat->attributes |= STATX_ATTR_APPEND; 892 } 893 return ret; 894 } 895 896 int orangefs_permission(struct user_namespace *mnt_userns, 897 struct inode *inode, int mask) 898 { 899 int ret; 900 901 if (mask & MAY_NOT_BLOCK) 902 return -ECHILD; 903 904 gossip_debug(GOSSIP_INODE_DEBUG, "%s: refreshing\n", __func__); 905 906 /* Make sure the permission (and other common attrs) are up to date. */ 907 ret = orangefs_inode_getattr(inode, 0); 908 if (ret < 0) 909 return ret; 910 911 return generic_permission(&init_user_ns, inode, mask); 912 } 913 914 int orangefs_update_time(struct inode *inode, struct timespec64 *time, int flags) 915 { 916 struct iattr iattr; 917 gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_update_time: %pU\n", 918 get_khandle_from_ino(inode)); 919 generic_update_time(inode, time, flags); 920 memset(&iattr, 0, sizeof iattr); 921 if (flags & S_ATIME) 922 iattr.ia_valid |= ATTR_ATIME; 923 if (flags & S_CTIME) 924 iattr.ia_valid |= ATTR_CTIME; 925 if (flags & S_MTIME) 926 iattr.ia_valid |= ATTR_MTIME; 927 return __orangefs_setattr(inode, &iattr); 928 } 929 930 static int orangefs_fileattr_get(struct dentry *dentry, struct fileattr *fa) 931 { 932 u64 val = 0; 933 int ret; 934 935 gossip_debug(GOSSIP_FILE_DEBUG, "%s: called on %pd\n", __func__, 936 dentry); 937 938 ret = orangefs_inode_getxattr(d_inode(dentry), 939 "user.pvfs2.meta_hint", 940 &val, sizeof(val)); 941 if (ret < 0 && ret != -ENODATA) 942 return ret; 943 944 gossip_debug(GOSSIP_FILE_DEBUG, "%s: flags=%u\n", __func__, (u32) val); 945 946 fileattr_fill_flags(fa, val); 947 return 0; 948 } 949 950 static int orangefs_fileattr_set(struct user_namespace *mnt_userns, 951 struct dentry *dentry, struct fileattr *fa) 952 { 953 u64 val = 0; 954 955 gossip_debug(GOSSIP_FILE_DEBUG, "%s: called on %pd\n", __func__, 956 dentry); 957 /* 958 * ORANGEFS_MIRROR_FL is set internally when the mirroring mode is 959 * turned on for a file. The user is not allowed to turn on this bit, 960 * but the bit is present if the user first gets the flags and then 961 * updates the flags with some new settings. So, we ignore it in the 962 * following edit. bligon. 963 */ 964 if (fileattr_has_fsx(fa) || 965 (fa->flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | FS_NOATIME_FL | ORANGEFS_MIRROR_FL))) { 966 gossip_err("%s: only supports setting one of FS_IMMUTABLE_FL|FS_APPEND_FL|FS_NOATIME_FL\n", 967 __func__); 968 return -EOPNOTSUPP; 969 } 970 val = fa->flags; 971 gossip_debug(GOSSIP_FILE_DEBUG, "%s: flags=%u\n", __func__, (u32) val); 972 return orangefs_inode_setxattr(d_inode(dentry), 973 "user.pvfs2.meta_hint", 974 &val, sizeof(val), 0); 975 } 976 977 /* ORANGEFS2 implementation of VFS inode operations for files */ 978 static const struct inode_operations orangefs_file_inode_operations = { 979 .get_acl = orangefs_get_acl, 980 .set_acl = orangefs_set_acl, 981 .setattr = orangefs_setattr, 982 .getattr = orangefs_getattr, 983 .listxattr = orangefs_listxattr, 984 .permission = orangefs_permission, 985 .update_time = orangefs_update_time, 986 .fileattr_get = orangefs_fileattr_get, 987 .fileattr_set = orangefs_fileattr_set, 988 }; 989 990 static int orangefs_init_iops(struct inode *inode) 991 { 992 inode->i_mapping->a_ops = &orangefs_address_operations; 993 994 switch (inode->i_mode & S_IFMT) { 995 case S_IFREG: 996 inode->i_op = &orangefs_file_inode_operations; 997 inode->i_fop = &orangefs_file_operations; 998 break; 999 case S_IFLNK: 1000 inode->i_op = &orangefs_symlink_inode_operations; 1001 break; 1002 case S_IFDIR: 1003 inode->i_op = &orangefs_dir_inode_operations; 1004 inode->i_fop = &orangefs_dir_operations; 1005 break; 1006 default: 1007 gossip_debug(GOSSIP_INODE_DEBUG, 1008 "%s: unsupported mode\n", 1009 __func__); 1010 return -EINVAL; 1011 } 1012 1013 return 0; 1014 } 1015 1016 /* 1017 * Given an ORANGEFS object identifier (fsid, handle), convert it into 1018 * a ino_t type that will be used as a hash-index from where the handle will 1019 * be searched for in the VFS hash table of inodes. 1020 */ 1021 static inline ino_t orangefs_handle_hash(struct orangefs_object_kref *ref) 1022 { 1023 if (!ref) 1024 return 0; 1025 return orangefs_khandle_to_ino(&(ref->khandle)); 1026 } 1027 1028 /* 1029 * Called to set up an inode from iget5_locked. 1030 */ 1031 static int orangefs_set_inode(struct inode *inode, void *data) 1032 { 1033 struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data; 1034 ORANGEFS_I(inode)->refn.fs_id = ref->fs_id; 1035 ORANGEFS_I(inode)->refn.khandle = ref->khandle; 1036 ORANGEFS_I(inode)->attr_valid = 0; 1037 hash_init(ORANGEFS_I(inode)->xattr_cache); 1038 ORANGEFS_I(inode)->mapping_time = jiffies - 1; 1039 ORANGEFS_I(inode)->bitlock = 0; 1040 return 0; 1041 } 1042 1043 /* 1044 * Called to determine if handles match. 1045 */ 1046 static int orangefs_test_inode(struct inode *inode, void *data) 1047 { 1048 struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data; 1049 struct orangefs_inode_s *orangefs_inode = NULL; 1050 1051 orangefs_inode = ORANGEFS_I(inode); 1052 /* test handles and fs_ids... */ 1053 return (!ORANGEFS_khandle_cmp(&(orangefs_inode->refn.khandle), 1054 &(ref->khandle)) && 1055 orangefs_inode->refn.fs_id == ref->fs_id); 1056 } 1057 1058 /* 1059 * Front-end to lookup the inode-cache maintained by the VFS using the ORANGEFS 1060 * file handle. 1061 * 1062 * @sb: the file system super block instance. 1063 * @ref: The ORANGEFS object for which we are trying to locate an inode. 1064 */ 1065 struct inode *orangefs_iget(struct super_block *sb, 1066 struct orangefs_object_kref *ref) 1067 { 1068 struct inode *inode = NULL; 1069 unsigned long hash; 1070 int error; 1071 1072 hash = orangefs_handle_hash(ref); 1073 inode = iget5_locked(sb, 1074 hash, 1075 orangefs_test_inode, 1076 orangefs_set_inode, 1077 ref); 1078 1079 if (!inode) 1080 return ERR_PTR(-ENOMEM); 1081 1082 if (!(inode->i_state & I_NEW)) 1083 return inode; 1084 1085 error = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_NEW); 1086 if (error) { 1087 iget_failed(inode); 1088 return ERR_PTR(error); 1089 } 1090 1091 inode->i_ino = hash; /* needed for stat etc */ 1092 orangefs_init_iops(inode); 1093 unlock_new_inode(inode); 1094 1095 gossip_debug(GOSSIP_INODE_DEBUG, 1096 "iget handle %pU, fsid %d hash %ld i_ino %lu\n", 1097 &ref->khandle, 1098 ref->fs_id, 1099 hash, 1100 inode->i_ino); 1101 1102 return inode; 1103 } 1104 1105 /* 1106 * Allocate an inode for a newly created file and insert it into the inode hash. 1107 */ 1108 struct inode *orangefs_new_inode(struct super_block *sb, struct inode *dir, 1109 int mode, dev_t dev, struct orangefs_object_kref *ref) 1110 { 1111 unsigned long hash = orangefs_handle_hash(ref); 1112 struct inode *inode; 1113 int error; 1114 1115 gossip_debug(GOSSIP_INODE_DEBUG, 1116 "%s:(sb is %p | MAJOR(dev)=%u | MINOR(dev)=%u mode=%o)\n", 1117 __func__, 1118 sb, 1119 MAJOR(dev), 1120 MINOR(dev), 1121 mode); 1122 1123 inode = new_inode(sb); 1124 if (!inode) 1125 return ERR_PTR(-ENOMEM); 1126 1127 orangefs_set_inode(inode, ref); 1128 inode->i_ino = hash; /* needed for stat etc */ 1129 1130 error = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_NEW); 1131 if (error) 1132 goto out_iput; 1133 1134 orangefs_init_iops(inode); 1135 inode->i_rdev = dev; 1136 1137 error = insert_inode_locked4(inode, hash, orangefs_test_inode, ref); 1138 if (error < 0) 1139 goto out_iput; 1140 1141 gossip_debug(GOSSIP_INODE_DEBUG, 1142 "Initializing ACL's for inode %pU\n", 1143 get_khandle_from_ino(inode)); 1144 orangefs_init_acl(inode, dir); 1145 return inode; 1146 1147 out_iput: 1148 iput(inode); 1149 return ERR_PTR(error); 1150 } 1151