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_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 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_readpage(struct file *file, struct page *page) 292 { 293 struct inode *inode = page->mapping->host; 294 struct iov_iter iter; 295 struct bio_vec bv; 296 ssize_t ret; 297 loff_t off; /* offset into this page */ 298 299 if (PageDirty(page)) 300 orangefs_launder_page(page); 301 302 off = page_offset(page); 303 bv.bv_page = page; 304 bv.bv_len = PAGE_SIZE; 305 bv.bv_offset = 0; 306 iov_iter_bvec(&iter, READ, &bv, 1, PAGE_SIZE); 307 308 ret = wait_for_direct_io(ORANGEFS_IO_READ, inode, &off, &iter, 309 PAGE_SIZE, 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_page(page); 314 if (ret < 0) { 315 SetPageError(page); 316 } else { 317 SetPageUptodate(page); 318 if (PageError(page)) 319 ClearPageError(page); 320 ret = 0; 321 } 322 /* unlock the page after the ->readpage() routine completes */ 323 unlock_page(page); 324 return ret; 325 } 326 327 static int orangefs_write_begin(struct file *file, 328 struct address_space *mapping, 329 loff_t pos, unsigned len, unsigned flags, struct page **pagep, 330 void **fsdata) 331 { 332 struct orangefs_write_range *wr; 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, flags); 340 if (!page) 341 return -ENOMEM; 342 343 *pagep = page; 344 345 if (PageDirty(page) && !PagePrivate(page)) { 346 /* 347 * Should be impossible. If it happens, launder the page 348 * since we don't know what's dirty. This will WARN in 349 * orangefs_writepage_locked. 350 */ 351 ret = orangefs_launder_page(page); 352 if (ret) 353 return ret; 354 } 355 if (PagePrivate(page)) { 356 struct orangefs_write_range *wr; 357 wr = (struct orangefs_write_range *)page_private(page); 358 if (wr->pos + wr->len == pos && 359 uid_eq(wr->uid, current_fsuid()) && 360 gid_eq(wr->gid, current_fsgid())) { 361 wr->len += len; 362 goto okay; 363 } else { 364 ret = orangefs_launder_page(page); 365 if (ret) 366 return ret; 367 } 368 } 369 370 wr = kmalloc(sizeof *wr, GFP_KERNEL); 371 if (!wr) 372 return -ENOMEM; 373 374 wr->pos = pos; 375 wr->len = len; 376 wr->uid = current_fsuid(); 377 wr->gid = current_fsgid(); 378 attach_page_private(page, wr); 379 okay: 380 return 0; 381 } 382 383 static int orangefs_write_end(struct file *file, struct address_space *mapping, 384 loff_t pos, unsigned len, unsigned copied, struct page *page, void *fsdata) 385 { 386 struct inode *inode = page->mapping->host; 387 loff_t last_pos = pos + copied; 388 389 /* 390 * No need to use i_size_read() here, the i_size 391 * cannot change under us because we hold the i_mutex. 392 */ 393 if (last_pos > inode->i_size) 394 i_size_write(inode, last_pos); 395 396 /* zero the stale part of the page if we did a short copy */ 397 if (!PageUptodate(page)) { 398 unsigned from = pos & (PAGE_SIZE - 1); 399 if (copied < len) { 400 zero_user(page, from + copied, len - copied); 401 } 402 /* Set fully written pages uptodate. */ 403 if (pos == page_offset(page) && 404 (len == PAGE_SIZE || pos + len == inode->i_size)) { 405 zero_user_segment(page, from + copied, PAGE_SIZE); 406 SetPageUptodate(page); 407 } 408 } 409 410 set_page_dirty(page); 411 unlock_page(page); 412 put_page(page); 413 414 mark_inode_dirty_sync(file_inode(file)); 415 return copied; 416 } 417 418 static void orangefs_invalidatepage(struct page *page, 419 unsigned int offset, 420 unsigned int length) 421 { 422 struct orangefs_write_range *wr; 423 wr = (struct orangefs_write_range *)page_private(page); 424 425 if (offset == 0 && length == PAGE_SIZE) { 426 kfree(detach_page_private(page)); 427 return; 428 /* write range entirely within invalidate range (or equal) */ 429 } else if (page_offset(page) + offset <= wr->pos && 430 wr->pos + wr->len <= page_offset(page) + offset + length) { 431 kfree(detach_page_private(page)); 432 /* XXX is this right? only caller in fs */ 433 cancel_dirty_page(page); 434 return; 435 /* invalidate range chops off end of write range */ 436 } else if (wr->pos < page_offset(page) + offset && 437 wr->pos + wr->len <= page_offset(page) + offset + length && 438 page_offset(page) + offset < wr->pos + wr->len) { 439 size_t x; 440 x = wr->pos + wr->len - (page_offset(page) + offset); 441 WARN_ON(x > wr->len); 442 wr->len -= x; 443 wr->uid = current_fsuid(); 444 wr->gid = current_fsgid(); 445 /* invalidate range chops off beginning of write range */ 446 } else if (page_offset(page) + offset <= wr->pos && 447 page_offset(page) + offset + length < wr->pos + wr->len && 448 wr->pos < page_offset(page) + offset + length) { 449 size_t x; 450 x = page_offset(page) + offset + length - wr->pos; 451 WARN_ON(x > wr->len); 452 wr->pos += x; 453 wr->len -= x; 454 wr->uid = current_fsuid(); 455 wr->gid = current_fsgid(); 456 /* invalidate range entirely within write range (punch hole) */ 457 } else if (wr->pos < page_offset(page) + offset && 458 page_offset(page) + offset + length < wr->pos + wr->len) { 459 /* XXX what do we do here... should not WARN_ON */ 460 WARN_ON(1); 461 /* punch hole */ 462 /* 463 * should we just ignore this and write it out anyway? 464 * it hardly makes sense 465 */ 466 return; 467 /* non-overlapping ranges */ 468 } else { 469 /* WARN if they do overlap */ 470 if (!((page_offset(page) + offset + length <= wr->pos) ^ 471 (wr->pos + wr->len <= page_offset(page) + offset))) { 472 WARN_ON(1); 473 printk("invalidate range offset %llu length %u\n", 474 page_offset(page) + offset, length); 475 printk("write range offset %llu length %zu\n", 476 wr->pos, wr->len); 477 } 478 return; 479 } 480 481 /* 482 * Above there are returns where wr is freed or where we WARN. 483 * Thus the following runs if wr was modified above. 484 */ 485 486 orangefs_launder_page(page); 487 } 488 489 static int orangefs_releasepage(struct page *page, gfp_t foo) 490 { 491 return !PagePrivate(page); 492 } 493 494 static void orangefs_freepage(struct page *page) 495 { 496 kfree(detach_page_private(page)); 497 } 498 499 static int orangefs_launder_page(struct page *page) 500 { 501 int r = 0; 502 struct writeback_control wbc = { 503 .sync_mode = WB_SYNC_ALL, 504 .nr_to_write = 0, 505 }; 506 wait_on_page_writeback(page); 507 if (clear_page_dirty_for_io(page)) { 508 r = orangefs_writepage_locked(page, &wbc); 509 end_page_writeback(page); 510 } 511 return r; 512 } 513 514 static ssize_t orangefs_direct_IO(struct kiocb *iocb, 515 struct iov_iter *iter) 516 { 517 /* 518 * Comment from original do_readv_writev: 519 * Common entry point for read/write/readv/writev 520 * This function will dispatch it to either the direct I/O 521 * or buffered I/O path depending on the mount options and/or 522 * augmented/extended metadata attached to the file. 523 * Note: File extended attributes override any mount options. 524 */ 525 struct file *file = iocb->ki_filp; 526 loff_t pos = iocb->ki_pos; 527 enum ORANGEFS_io_type type = iov_iter_rw(iter) == WRITE ? 528 ORANGEFS_IO_WRITE : ORANGEFS_IO_READ; 529 loff_t *offset = &pos; 530 struct inode *inode = file->f_mapping->host; 531 struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode); 532 struct orangefs_khandle *handle = &orangefs_inode->refn.khandle; 533 size_t count = iov_iter_count(iter); 534 ssize_t total_count = 0; 535 ssize_t ret = -EINVAL; 536 int i = 0; 537 538 gossip_debug(GOSSIP_FILE_DEBUG, 539 "%s-BEGIN(%pU): count(%d) after estimate_max_iovecs.\n", 540 __func__, 541 handle, 542 (int)count); 543 544 if (type == ORANGEFS_IO_WRITE) { 545 gossip_debug(GOSSIP_FILE_DEBUG, 546 "%s(%pU): proceeding with offset : %llu, " 547 "size %d\n", 548 __func__, 549 handle, 550 llu(*offset), 551 (int)count); 552 } 553 554 if (count == 0) { 555 ret = 0; 556 goto out; 557 } 558 559 while (iov_iter_count(iter)) { 560 size_t each_count = iov_iter_count(iter); 561 size_t amt_complete; 562 i++; 563 564 /* how much to transfer in this loop iteration */ 565 if (each_count > orangefs_bufmap_size_query()) 566 each_count = orangefs_bufmap_size_query(); 567 568 gossip_debug(GOSSIP_FILE_DEBUG, 569 "%s(%pU): size of each_count(%d)\n", 570 __func__, 571 handle, 572 (int)each_count); 573 gossip_debug(GOSSIP_FILE_DEBUG, 574 "%s(%pU): BEFORE wait_for_io: offset is %d\n", 575 __func__, 576 handle, 577 (int)*offset); 578 579 ret = wait_for_direct_io(type, inode, offset, iter, 580 each_count, 0, NULL, NULL, file); 581 gossip_debug(GOSSIP_FILE_DEBUG, 582 "%s(%pU): return from wait_for_io:%d\n", 583 __func__, 584 handle, 585 (int)ret); 586 587 if (ret < 0) 588 goto out; 589 590 *offset += ret; 591 total_count += ret; 592 amt_complete = ret; 593 594 gossip_debug(GOSSIP_FILE_DEBUG, 595 "%s(%pU): AFTER wait_for_io: offset is %d\n", 596 __func__, 597 handle, 598 (int)*offset); 599 600 /* 601 * if we got a short I/O operations, 602 * fall out and return what we got so far 603 */ 604 if (amt_complete < each_count) 605 break; 606 } /*end while */ 607 608 out: 609 if (total_count > 0) 610 ret = total_count; 611 if (ret > 0) { 612 if (type == ORANGEFS_IO_READ) { 613 file_accessed(file); 614 } else { 615 file_update_time(file); 616 if (*offset > i_size_read(inode)) 617 i_size_write(inode, *offset); 618 } 619 } 620 621 gossip_debug(GOSSIP_FILE_DEBUG, 622 "%s(%pU): Value(%d) returned.\n", 623 __func__, 624 handle, 625 (int)ret); 626 627 return ret; 628 } 629 630 /** ORANGEFS2 implementation of address space operations */ 631 static const struct address_space_operations orangefs_address_operations = { 632 .writepage = orangefs_writepage, 633 .readahead = orangefs_readahead, 634 .readpage = orangefs_readpage, 635 .writepages = orangefs_writepages, 636 .set_page_dirty = __set_page_dirty_nobuffers, 637 .write_begin = orangefs_write_begin, 638 .write_end = orangefs_write_end, 639 .invalidatepage = orangefs_invalidatepage, 640 .releasepage = orangefs_releasepage, 641 .freepage = orangefs_freepage, 642 .launder_page = orangefs_launder_page, 643 .direct_IO = orangefs_direct_IO, 644 }; 645 646 vm_fault_t orangefs_page_mkwrite(struct vm_fault *vmf) 647 { 648 struct page *page = vmf->page; 649 struct inode *inode = file_inode(vmf->vma->vm_file); 650 struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode); 651 unsigned long *bitlock = &orangefs_inode->bitlock; 652 vm_fault_t ret; 653 struct orangefs_write_range *wr; 654 655 sb_start_pagefault(inode->i_sb); 656 657 if (wait_on_bit(bitlock, 1, TASK_KILLABLE)) { 658 ret = VM_FAULT_RETRY; 659 goto out; 660 } 661 662 lock_page(page); 663 if (PageDirty(page) && !PagePrivate(page)) { 664 /* 665 * Should be impossible. If it happens, launder the page 666 * since we don't know what's dirty. This will WARN in 667 * orangefs_writepage_locked. 668 */ 669 if (orangefs_launder_page(page)) { 670 ret = VM_FAULT_LOCKED|VM_FAULT_RETRY; 671 goto out; 672 } 673 } 674 if (PagePrivate(page)) { 675 wr = (struct orangefs_write_range *)page_private(page); 676 if (uid_eq(wr->uid, current_fsuid()) && 677 gid_eq(wr->gid, current_fsgid())) { 678 wr->pos = page_offset(page); 679 wr->len = PAGE_SIZE; 680 goto okay; 681 } else { 682 if (orangefs_launder_page(page)) { 683 ret = VM_FAULT_LOCKED|VM_FAULT_RETRY; 684 goto out; 685 } 686 } 687 } 688 wr = kmalloc(sizeof *wr, GFP_KERNEL); 689 if (!wr) { 690 ret = VM_FAULT_LOCKED|VM_FAULT_RETRY; 691 goto out; 692 } 693 wr->pos = page_offset(page); 694 wr->len = PAGE_SIZE; 695 wr->uid = current_fsuid(); 696 wr->gid = current_fsgid(); 697 attach_page_private(page, wr); 698 okay: 699 700 file_update_time(vmf->vma->vm_file); 701 if (page->mapping != inode->i_mapping) { 702 unlock_page(page); 703 ret = VM_FAULT_LOCKED|VM_FAULT_NOPAGE; 704 goto out; 705 } 706 707 /* 708 * We mark the page dirty already here so that when freeze is in 709 * progress, we are guaranteed that writeback during freezing will 710 * see the dirty page and writeprotect it again. 711 */ 712 set_page_dirty(page); 713 wait_for_stable_page(page); 714 ret = VM_FAULT_LOCKED; 715 out: 716 sb_end_pagefault(inode->i_sb); 717 return ret; 718 } 719 720 static int orangefs_setattr_size(struct inode *inode, struct iattr *iattr) 721 { 722 struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode); 723 struct orangefs_kernel_op_s *new_op; 724 loff_t orig_size; 725 int ret = -EINVAL; 726 727 gossip_debug(GOSSIP_INODE_DEBUG, 728 "%s: %pU: Handle is %pU | fs_id %d | size is %llu\n", 729 __func__, 730 get_khandle_from_ino(inode), 731 &orangefs_inode->refn.khandle, 732 orangefs_inode->refn.fs_id, 733 iattr->ia_size); 734 735 /* Ensure that we have a up to date size, so we know if it changed. */ 736 ret = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_SIZE); 737 if (ret == -ESTALE) 738 ret = -EIO; 739 if (ret) { 740 gossip_err("%s: orangefs_inode_getattr failed, ret:%d:.\n", 741 __func__, ret); 742 return ret; 743 } 744 orig_size = i_size_read(inode); 745 746 /* This is truncate_setsize in a different order. */ 747 truncate_pagecache(inode, iattr->ia_size); 748 i_size_write(inode, iattr->ia_size); 749 if (iattr->ia_size > orig_size) 750 pagecache_isize_extended(inode, orig_size, iattr->ia_size); 751 752 new_op = op_alloc(ORANGEFS_VFS_OP_TRUNCATE); 753 if (!new_op) 754 return -ENOMEM; 755 756 new_op->upcall.req.truncate.refn = orangefs_inode->refn; 757 new_op->upcall.req.truncate.size = (__s64) iattr->ia_size; 758 759 ret = service_operation(new_op, 760 __func__, 761 get_interruptible_flag(inode)); 762 763 /* 764 * the truncate has no downcall members to retrieve, but 765 * the status value tells us if it went through ok or not 766 */ 767 gossip_debug(GOSSIP_INODE_DEBUG, "%s: ret:%d:\n", __func__, ret); 768 769 op_release(new_op); 770 771 if (ret != 0) 772 return ret; 773 774 if (orig_size != i_size_read(inode)) 775 iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME; 776 777 return ret; 778 } 779 780 int __orangefs_setattr(struct inode *inode, struct iattr *iattr) 781 { 782 int ret; 783 784 if (iattr->ia_valid & ATTR_MODE) { 785 if (iattr->ia_mode & (S_ISVTX)) { 786 if (is_root_handle(inode)) { 787 /* 788 * allow sticky bit to be set on root (since 789 * it shows up that way by default anyhow), 790 * but don't show it to the server 791 */ 792 iattr->ia_mode -= S_ISVTX; 793 } else { 794 gossip_debug(GOSSIP_UTILS_DEBUG, 795 "User attempted to set sticky bit on non-root directory; returning EINVAL.\n"); 796 ret = -EINVAL; 797 goto out; 798 } 799 } 800 if (iattr->ia_mode & (S_ISUID)) { 801 gossip_debug(GOSSIP_UTILS_DEBUG, 802 "Attempting to set setuid bit (not supported); returning EINVAL.\n"); 803 ret = -EINVAL; 804 goto out; 805 } 806 } 807 808 if (iattr->ia_valid & ATTR_SIZE) { 809 ret = orangefs_setattr_size(inode, iattr); 810 if (ret) 811 goto out; 812 } 813 814 again: 815 spin_lock(&inode->i_lock); 816 if (ORANGEFS_I(inode)->attr_valid) { 817 if (uid_eq(ORANGEFS_I(inode)->attr_uid, current_fsuid()) && 818 gid_eq(ORANGEFS_I(inode)->attr_gid, current_fsgid())) { 819 ORANGEFS_I(inode)->attr_valid = iattr->ia_valid; 820 } else { 821 spin_unlock(&inode->i_lock); 822 write_inode_now(inode, 1); 823 goto again; 824 } 825 } else { 826 ORANGEFS_I(inode)->attr_valid = iattr->ia_valid; 827 ORANGEFS_I(inode)->attr_uid = current_fsuid(); 828 ORANGEFS_I(inode)->attr_gid = current_fsgid(); 829 } 830 setattr_copy(&init_user_ns, inode, iattr); 831 spin_unlock(&inode->i_lock); 832 mark_inode_dirty(inode); 833 834 if (iattr->ia_valid & ATTR_MODE) 835 /* change mod on a file that has ACLs */ 836 ret = posix_acl_chmod(&init_user_ns, inode, inode->i_mode); 837 838 ret = 0; 839 out: 840 return ret; 841 } 842 843 /* 844 * Change attributes of an object referenced by dentry. 845 */ 846 int orangefs_setattr(struct user_namespace *mnt_userns, struct dentry *dentry, 847 struct iattr *iattr) 848 { 849 int ret; 850 gossip_debug(GOSSIP_INODE_DEBUG, "__orangefs_setattr: called on %pd\n", 851 dentry); 852 ret = setattr_prepare(&init_user_ns, dentry, iattr); 853 if (ret) 854 goto out; 855 ret = __orangefs_setattr(d_inode(dentry), iattr); 856 sync_inode_metadata(d_inode(dentry), 1); 857 out: 858 gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_setattr: returning %d\n", 859 ret); 860 return ret; 861 } 862 863 /* 864 * Obtain attributes of an object given a dentry 865 */ 866 int orangefs_getattr(struct user_namespace *mnt_userns, const struct path *path, 867 struct kstat *stat, u32 request_mask, unsigned int flags) 868 { 869 int ret; 870 struct inode *inode = path->dentry->d_inode; 871 872 gossip_debug(GOSSIP_INODE_DEBUG, 873 "orangefs_getattr: called on %pd mask %u\n", 874 path->dentry, request_mask); 875 876 ret = orangefs_inode_getattr(inode, 877 request_mask & STATX_SIZE ? ORANGEFS_GETATTR_SIZE : 0); 878 if (ret == 0) { 879 generic_fillattr(&init_user_ns, inode, stat); 880 881 /* override block size reported to stat */ 882 if (!(request_mask & STATX_SIZE)) 883 stat->result_mask &= ~STATX_SIZE; 884 885 generic_fill_statx_attr(inode, stat); 886 } 887 return ret; 888 } 889 890 int orangefs_permission(struct user_namespace *mnt_userns, 891 struct inode *inode, int mask) 892 { 893 int ret; 894 895 if (mask & MAY_NOT_BLOCK) 896 return -ECHILD; 897 898 gossip_debug(GOSSIP_INODE_DEBUG, "%s: refreshing\n", __func__); 899 900 /* Make sure the permission (and other common attrs) are up to date. */ 901 ret = orangefs_inode_getattr(inode, 0); 902 if (ret < 0) 903 return ret; 904 905 return generic_permission(&init_user_ns, inode, mask); 906 } 907 908 int orangefs_update_time(struct inode *inode, struct timespec64 *time, int flags) 909 { 910 struct iattr iattr; 911 gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_update_time: %pU\n", 912 get_khandle_from_ino(inode)); 913 generic_update_time(inode, time, flags); 914 memset(&iattr, 0, sizeof iattr); 915 if (flags & S_ATIME) 916 iattr.ia_valid |= ATTR_ATIME; 917 if (flags & S_CTIME) 918 iattr.ia_valid |= ATTR_CTIME; 919 if (flags & S_MTIME) 920 iattr.ia_valid |= ATTR_MTIME; 921 return __orangefs_setattr(inode, &iattr); 922 } 923 924 static int orangefs_fileattr_get(struct dentry *dentry, struct fileattr *fa) 925 { 926 u64 val = 0; 927 int ret; 928 929 gossip_debug(GOSSIP_FILE_DEBUG, "%s: called on %pd\n", __func__, 930 dentry); 931 932 ret = orangefs_inode_getxattr(d_inode(dentry), 933 "user.pvfs2.meta_hint", 934 &val, sizeof(val)); 935 if (ret < 0 && ret != -ENODATA) 936 return ret; 937 938 gossip_debug(GOSSIP_FILE_DEBUG, "%s: flags=%u\n", __func__, (u32) val); 939 940 fileattr_fill_flags(fa, val); 941 return 0; 942 } 943 944 static int orangefs_fileattr_set(struct user_namespace *mnt_userns, 945 struct dentry *dentry, struct fileattr *fa) 946 { 947 u64 val = 0; 948 949 gossip_debug(GOSSIP_FILE_DEBUG, "%s: called on %pd\n", __func__, 950 dentry); 951 /* 952 * ORANGEFS_MIRROR_FL is set internally when the mirroring mode is 953 * turned on for a file. The user is not allowed to turn on this bit, 954 * but the bit is present if the user first gets the flags and then 955 * updates the flags with some new settings. So, we ignore it in the 956 * following edit. bligon. 957 */ 958 if (fileattr_has_fsx(fa) || 959 (fa->flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | FS_NOATIME_FL | ORANGEFS_MIRROR_FL))) { 960 gossip_err("%s: only supports setting one of FS_IMMUTABLE_FL|FS_APPEND_FL|FS_NOATIME_FL\n", 961 __func__); 962 return -EOPNOTSUPP; 963 } 964 val = fa->flags; 965 gossip_debug(GOSSIP_FILE_DEBUG, "%s: flags=%u\n", __func__, (u32) val); 966 return orangefs_inode_setxattr(d_inode(dentry), 967 "user.pvfs2.meta_hint", 968 &val, sizeof(val), 0); 969 } 970 971 /* ORANGEFS2 implementation of VFS inode operations for files */ 972 static const struct inode_operations orangefs_file_inode_operations = { 973 .get_acl = orangefs_get_acl, 974 .set_acl = orangefs_set_acl, 975 .setattr = orangefs_setattr, 976 .getattr = orangefs_getattr, 977 .listxattr = orangefs_listxattr, 978 .permission = orangefs_permission, 979 .update_time = orangefs_update_time, 980 .fileattr_get = orangefs_fileattr_get, 981 .fileattr_set = orangefs_fileattr_set, 982 }; 983 984 static int orangefs_init_iops(struct inode *inode) 985 { 986 inode->i_mapping->a_ops = &orangefs_address_operations; 987 988 switch (inode->i_mode & S_IFMT) { 989 case S_IFREG: 990 inode->i_op = &orangefs_file_inode_operations; 991 inode->i_fop = &orangefs_file_operations; 992 break; 993 case S_IFLNK: 994 inode->i_op = &orangefs_symlink_inode_operations; 995 break; 996 case S_IFDIR: 997 inode->i_op = &orangefs_dir_inode_operations; 998 inode->i_fop = &orangefs_dir_operations; 999 break; 1000 default: 1001 gossip_debug(GOSSIP_INODE_DEBUG, 1002 "%s: unsupported mode\n", 1003 __func__); 1004 return -EINVAL; 1005 } 1006 1007 return 0; 1008 } 1009 1010 /* 1011 * Given an ORANGEFS object identifier (fsid, handle), convert it into 1012 * a ino_t type that will be used as a hash-index from where the handle will 1013 * be searched for in the VFS hash table of inodes. 1014 */ 1015 static inline ino_t orangefs_handle_hash(struct orangefs_object_kref *ref) 1016 { 1017 if (!ref) 1018 return 0; 1019 return orangefs_khandle_to_ino(&(ref->khandle)); 1020 } 1021 1022 /* 1023 * Called to set up an inode from iget5_locked. 1024 */ 1025 static int orangefs_set_inode(struct inode *inode, void *data) 1026 { 1027 struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data; 1028 ORANGEFS_I(inode)->refn.fs_id = ref->fs_id; 1029 ORANGEFS_I(inode)->refn.khandle = ref->khandle; 1030 ORANGEFS_I(inode)->attr_valid = 0; 1031 hash_init(ORANGEFS_I(inode)->xattr_cache); 1032 ORANGEFS_I(inode)->mapping_time = jiffies - 1; 1033 ORANGEFS_I(inode)->bitlock = 0; 1034 return 0; 1035 } 1036 1037 /* 1038 * Called to determine if handles match. 1039 */ 1040 static int orangefs_test_inode(struct inode *inode, void *data) 1041 { 1042 struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data; 1043 struct orangefs_inode_s *orangefs_inode = NULL; 1044 1045 orangefs_inode = ORANGEFS_I(inode); 1046 /* test handles and fs_ids... */ 1047 return (!ORANGEFS_khandle_cmp(&(orangefs_inode->refn.khandle), 1048 &(ref->khandle)) && 1049 orangefs_inode->refn.fs_id == ref->fs_id); 1050 } 1051 1052 /* 1053 * Front-end to lookup the inode-cache maintained by the VFS using the ORANGEFS 1054 * file handle. 1055 * 1056 * @sb: the file system super block instance. 1057 * @ref: The ORANGEFS object for which we are trying to locate an inode. 1058 */ 1059 struct inode *orangefs_iget(struct super_block *sb, 1060 struct orangefs_object_kref *ref) 1061 { 1062 struct inode *inode = NULL; 1063 unsigned long hash; 1064 int error; 1065 1066 hash = orangefs_handle_hash(ref); 1067 inode = iget5_locked(sb, 1068 hash, 1069 orangefs_test_inode, 1070 orangefs_set_inode, 1071 ref); 1072 1073 if (!inode) 1074 return ERR_PTR(-ENOMEM); 1075 1076 if (!(inode->i_state & I_NEW)) 1077 return inode; 1078 1079 error = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_NEW); 1080 if (error) { 1081 iget_failed(inode); 1082 return ERR_PTR(error); 1083 } 1084 1085 inode->i_ino = hash; /* needed for stat etc */ 1086 orangefs_init_iops(inode); 1087 unlock_new_inode(inode); 1088 1089 gossip_debug(GOSSIP_INODE_DEBUG, 1090 "iget handle %pU, fsid %d hash %ld i_ino %lu\n", 1091 &ref->khandle, 1092 ref->fs_id, 1093 hash, 1094 inode->i_ino); 1095 1096 return inode; 1097 } 1098 1099 /* 1100 * Allocate an inode for a newly created file and insert it into the inode hash. 1101 */ 1102 struct inode *orangefs_new_inode(struct super_block *sb, struct inode *dir, 1103 int mode, dev_t dev, struct orangefs_object_kref *ref) 1104 { 1105 unsigned long hash = orangefs_handle_hash(ref); 1106 struct inode *inode; 1107 int error; 1108 1109 gossip_debug(GOSSIP_INODE_DEBUG, 1110 "%s:(sb is %p | MAJOR(dev)=%u | MINOR(dev)=%u mode=%o)\n", 1111 __func__, 1112 sb, 1113 MAJOR(dev), 1114 MINOR(dev), 1115 mode); 1116 1117 inode = new_inode(sb); 1118 if (!inode) 1119 return ERR_PTR(-ENOMEM); 1120 1121 orangefs_set_inode(inode, ref); 1122 inode->i_ino = hash; /* needed for stat etc */ 1123 1124 error = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_NEW); 1125 if (error) 1126 goto out_iput; 1127 1128 orangefs_init_iops(inode); 1129 inode->i_rdev = dev; 1130 1131 error = insert_inode_locked4(inode, hash, orangefs_test_inode, ref); 1132 if (error < 0) 1133 goto out_iput; 1134 1135 gossip_debug(GOSSIP_INODE_DEBUG, 1136 "Initializing ACL's for inode %pU\n", 1137 get_khandle_from_ino(inode)); 1138 orangefs_init_acl(inode, dir); 1139 return inode; 1140 1141 out_iput: 1142 iput(inode); 1143 return ERR_PTR(error); 1144 } 1145