1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * fs/f2fs/file.c 4 * 5 * Copyright (c) 2012 Samsung Electronics Co., Ltd. 6 * http://www.samsung.com/ 7 */ 8 #include <linux/blk-crypto.h> 9 #include <linux/fs.h> 10 #include <linux/f2fs_fs.h> 11 #include <linux/stat.h> 12 #include <linux/writeback.h> 13 #include <linux/blkdev.h> 14 #include <linux/falloc.h> 15 #include <linux/filelock.h> 16 #include <linux/types.h> 17 #include <linux/compat.h> 18 #include <linux/uaccess.h> 19 #include <linux/mount.h> 20 #include <linux/uio.h> 21 #include <linux/uuid.h> 22 #include <linux/file.h> 23 #include <linux/nls.h> 24 #include <linux/sched/signal.h> 25 #include <linux/fileattr.h> 26 #include <linux/fadvise.h> 27 #include <linux/iomap.h> 28 29 #include "f2fs.h" 30 #include "node.h" 31 #include "segment.h" 32 #include "xattr.h" 33 #include "acl.h" 34 #include "gc.h" 35 #include "iostat.h" 36 #include <trace/events/f2fs.h> 37 #include <uapi/linux/f2fs.h> 38 39 static void f2fs_zero_post_eof_page(struct inode *inode, 40 loff_t new_size, bool lock) 41 { 42 loff_t old_size = i_size_read(inode); 43 44 if (old_size >= new_size) 45 return; 46 47 if (mapping_empty(inode->i_mapping)) 48 return; 49 50 if (lock) 51 filemap_invalidate_lock(inode->i_mapping); 52 /* zero or drop pages only in range of [old_size, new_size] */ 53 truncate_inode_pages_range(inode->i_mapping, old_size, new_size); 54 if (lock) 55 filemap_invalidate_unlock(inode->i_mapping); 56 } 57 58 static vm_fault_t f2fs_filemap_fault(struct vm_fault *vmf) 59 { 60 struct inode *inode = file_inode(vmf->vma->vm_file); 61 vm_flags_t flags = vmf->vma->vm_flags; 62 vm_fault_t ret; 63 64 ret = filemap_fault(vmf); 65 if (ret & VM_FAULT_LOCKED) 66 f2fs_update_iostat(F2FS_I_SB(inode), inode, 67 APP_MAPPED_READ_IO, F2FS_BLKSIZE); 68 69 trace_f2fs_filemap_fault(inode, vmf->pgoff, flags, ret); 70 71 return ret; 72 } 73 74 static vm_fault_t f2fs_vm_page_mkwrite(struct vm_fault *vmf) 75 { 76 struct folio *folio = page_folio(vmf->page); 77 struct inode *inode = file_inode(vmf->vma->vm_file); 78 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 79 struct dnode_of_data dn; 80 bool need_alloc = !f2fs_is_pinned_file(inode); 81 int err = 0; 82 vm_fault_t ret; 83 84 if (unlikely(IS_IMMUTABLE(inode))) 85 return VM_FAULT_SIGBUS; 86 87 if (is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) { 88 err = -EIO; 89 goto out; 90 } 91 92 if (unlikely(f2fs_cp_error(sbi))) { 93 err = -EIO; 94 goto out; 95 } 96 97 if (!f2fs_is_checkpoint_ready(sbi)) { 98 err = -ENOSPC; 99 goto out; 100 } 101 102 err = f2fs_convert_inline_inode(inode); 103 if (err) 104 goto out; 105 106 #ifdef CONFIG_F2FS_FS_COMPRESSION 107 if (f2fs_compressed_file(inode)) { 108 int ret = f2fs_is_compressed_cluster(inode, folio->index); 109 110 if (ret < 0) { 111 err = ret; 112 goto out; 113 } else if (ret) { 114 need_alloc = false; 115 } 116 } 117 #endif 118 /* should do out of any locked page */ 119 if (need_alloc) 120 f2fs_balance_fs(sbi, true); 121 122 sb_start_pagefault(inode->i_sb); 123 124 f2fs_bug_on(sbi, f2fs_has_inline_data(inode)); 125 126 f2fs_zero_post_eof_page(inode, (folio->index + 1) << PAGE_SHIFT, true); 127 128 file_update_time(vmf->vma->vm_file); 129 filemap_invalidate_lock_shared(inode->i_mapping); 130 131 folio_lock(folio); 132 if (unlikely(folio->mapping != inode->i_mapping || 133 folio_pos(folio) > i_size_read(inode) || 134 !folio_test_uptodate(folio))) { 135 folio_unlock(folio); 136 err = -EFAULT; 137 goto out_sem; 138 } 139 140 set_new_dnode(&dn, inode, NULL, NULL, 0); 141 if (need_alloc) { 142 /* block allocation */ 143 err = f2fs_get_block_locked(&dn, folio->index); 144 } else { 145 err = f2fs_get_dnode_of_data(&dn, folio->index, LOOKUP_NODE); 146 f2fs_put_dnode(&dn); 147 if (f2fs_is_pinned_file(inode) && 148 !__is_valid_data_blkaddr(dn.data_blkaddr)) 149 err = -EIO; 150 } 151 152 if (err) { 153 folio_unlock(folio); 154 goto out_sem; 155 } 156 157 f2fs_folio_wait_writeback(folio, DATA, false, true); 158 159 /* wait for GCed page writeback via META_MAPPING */ 160 f2fs_wait_on_block_writeback(inode, dn.data_blkaddr); 161 162 /* 163 * check to see if the page is mapped already (no holes) 164 */ 165 if (folio_test_mappedtodisk(folio)) 166 goto out_sem; 167 168 /* page is wholly or partially inside EOF */ 169 if (((loff_t)(folio->index + 1) << PAGE_SHIFT) > 170 i_size_read(inode)) { 171 loff_t offset; 172 173 offset = i_size_read(inode) & ~PAGE_MASK; 174 folio_zero_segment(folio, offset, folio_size(folio)); 175 } 176 folio_mark_dirty(folio); 177 178 f2fs_update_iostat(sbi, inode, APP_MAPPED_IO, F2FS_BLKSIZE); 179 f2fs_update_time(sbi, REQ_TIME); 180 181 out_sem: 182 filemap_invalidate_unlock_shared(inode->i_mapping); 183 184 sb_end_pagefault(inode->i_sb); 185 out: 186 ret = vmf_fs_error(err); 187 188 trace_f2fs_vm_page_mkwrite(inode, folio->index, vmf->vma->vm_flags, ret); 189 return ret; 190 } 191 192 static const struct vm_operations_struct f2fs_file_vm_ops = { 193 .fault = f2fs_filemap_fault, 194 .map_pages = filemap_map_pages, 195 .page_mkwrite = f2fs_vm_page_mkwrite, 196 }; 197 198 static int get_parent_ino(struct inode *inode, nid_t *pino) 199 { 200 struct dentry *dentry; 201 202 /* 203 * Make sure to get the non-deleted alias. The alias associated with 204 * the open file descriptor being fsync()'ed may be deleted already. 205 */ 206 dentry = d_find_alias(inode); 207 if (!dentry) 208 return 0; 209 210 *pino = d_parent_ino(dentry); 211 dput(dentry); 212 return 1; 213 } 214 215 static inline enum cp_reason_type need_do_checkpoint(struct inode *inode) 216 { 217 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 218 enum cp_reason_type cp_reason = CP_NO_NEEDED; 219 220 if (!S_ISREG(inode->i_mode)) 221 cp_reason = CP_NON_REGULAR; 222 else if (f2fs_compressed_file(inode)) 223 cp_reason = CP_COMPRESSED; 224 else if (inode->i_nlink != 1) 225 cp_reason = CP_HARDLINK; 226 else if (is_sbi_flag_set(sbi, SBI_NEED_CP)) 227 cp_reason = CP_SB_NEED_CP; 228 else if (file_wrong_pino(inode)) 229 cp_reason = CP_WRONG_PINO; 230 else if (!f2fs_space_for_roll_forward(sbi)) 231 cp_reason = CP_NO_SPC_ROLL; 232 else if (!f2fs_is_checkpointed_node(sbi, F2FS_I(inode)->i_pino)) 233 cp_reason = CP_NODE_NEED_CP; 234 else if (test_opt(sbi, FASTBOOT)) 235 cp_reason = CP_FASTBOOT_MODE; 236 else if (F2FS_OPTION(sbi).active_logs == 2) 237 cp_reason = CP_SPEC_LOG_NUM; 238 else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT && 239 f2fs_need_dentry_mark(sbi, inode->i_ino) && 240 f2fs_exist_written_data(sbi, F2FS_I(inode)->i_pino, 241 TRANS_DIR_INO)) 242 cp_reason = CP_RECOVER_DIR; 243 else if (f2fs_exist_written_data(sbi, F2FS_I(inode)->i_pino, 244 XATTR_DIR_INO)) 245 cp_reason = CP_XATTR_DIR; 246 247 return cp_reason; 248 } 249 250 static bool need_inode_page_update(struct f2fs_sb_info *sbi, nid_t ino) 251 { 252 struct folio *i = filemap_get_folio(NODE_MAPPING(sbi), ino); 253 bool ret = false; 254 /* But we need to avoid that there are some inode updates */ 255 if ((!IS_ERR(i) && folio_test_dirty(i)) || 256 f2fs_need_inode_block_update(sbi, ino)) 257 ret = true; 258 f2fs_folio_put(i, false); 259 return ret; 260 } 261 262 static void try_to_fix_pino(struct inode *inode) 263 { 264 struct f2fs_inode_info *fi = F2FS_I(inode); 265 nid_t pino; 266 267 f2fs_down_write(&fi->i_sem); 268 if (file_wrong_pino(inode) && inode->i_nlink == 1 && 269 get_parent_ino(inode, &pino)) { 270 f2fs_i_pino_write(inode, pino); 271 file_got_pino(inode); 272 } 273 f2fs_up_write(&fi->i_sem); 274 } 275 276 static int f2fs_do_sync_file(struct file *file, loff_t start, loff_t end, 277 int datasync, bool atomic) 278 { 279 struct inode *inode = file->f_mapping->host; 280 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 281 nid_t ino = inode->i_ino; 282 int ret = 0; 283 enum cp_reason_type cp_reason = 0; 284 struct writeback_control wbc = { 285 .sync_mode = WB_SYNC_ALL, 286 .nr_to_write = LONG_MAX, 287 }; 288 unsigned int seq_id = 0; 289 290 if (unlikely(f2fs_readonly(inode->i_sb))) 291 return 0; 292 293 trace_f2fs_sync_file_enter(inode); 294 295 if (S_ISDIR(inode->i_mode)) 296 goto go_write; 297 298 /* if fdatasync is triggered, let's do in-place-update */ 299 if (datasync || get_dirty_pages(inode) <= SM_I(sbi)->min_fsync_blocks) 300 set_inode_flag(inode, FI_NEED_IPU); 301 ret = file_write_and_wait_range(file, start, end); 302 clear_inode_flag(inode, FI_NEED_IPU); 303 304 if (ret || is_sbi_flag_set(sbi, SBI_CP_DISABLED)) { 305 trace_f2fs_sync_file_exit(inode, cp_reason, datasync, ret); 306 return ret; 307 } 308 309 /* if the inode is dirty, let's recover all the time */ 310 if (!f2fs_skip_inode_update(inode, datasync)) { 311 f2fs_write_inode(inode, NULL); 312 goto go_write; 313 } 314 315 /* 316 * if there is no written data, don't waste time to write recovery info. 317 */ 318 if (!is_inode_flag_set(inode, FI_APPEND_WRITE) && 319 !f2fs_exist_written_data(sbi, ino, APPEND_INO)) { 320 321 /* it may call write_inode just prior to fsync */ 322 if (need_inode_page_update(sbi, ino)) 323 goto go_write; 324 325 if (is_inode_flag_set(inode, FI_UPDATE_WRITE) || 326 f2fs_exist_written_data(sbi, ino, UPDATE_INO)) 327 goto flush_out; 328 goto out; 329 } else { 330 /* 331 * for OPU case, during fsync(), node can be persisted before 332 * data when lower device doesn't support write barrier, result 333 * in data corruption after SPO. 334 * So for strict fsync mode, force to use atomic write semantics 335 * to keep write order in between data/node and last node to 336 * avoid potential data corruption. 337 */ 338 if (F2FS_OPTION(sbi).fsync_mode == 339 FSYNC_MODE_STRICT && !atomic) 340 atomic = true; 341 } 342 go_write: 343 /* 344 * Both of fdatasync() and fsync() are able to be recovered from 345 * sudden-power-off. 346 */ 347 f2fs_down_read(&F2FS_I(inode)->i_sem); 348 cp_reason = need_do_checkpoint(inode); 349 f2fs_up_read(&F2FS_I(inode)->i_sem); 350 351 if (cp_reason) { 352 /* all the dirty node pages should be flushed for POR */ 353 ret = f2fs_sync_fs(inode->i_sb, 1); 354 355 /* 356 * We've secured consistency through sync_fs. Following pino 357 * will be used only for fsynced inodes after checkpoint. 358 */ 359 try_to_fix_pino(inode); 360 clear_inode_flag(inode, FI_APPEND_WRITE); 361 clear_inode_flag(inode, FI_UPDATE_WRITE); 362 goto out; 363 } 364 sync_nodes: 365 atomic_inc(&sbi->wb_sync_req[NODE]); 366 ret = f2fs_fsync_node_pages(sbi, inode, &wbc, atomic, &seq_id); 367 atomic_dec(&sbi->wb_sync_req[NODE]); 368 if (ret) 369 goto out; 370 371 /* if cp_error was enabled, we should avoid infinite loop */ 372 if (unlikely(f2fs_cp_error(sbi))) { 373 ret = -EIO; 374 goto out; 375 } 376 377 if (f2fs_need_inode_block_update(sbi, ino)) { 378 f2fs_mark_inode_dirty_sync(inode, true); 379 f2fs_write_inode(inode, NULL); 380 goto sync_nodes; 381 } 382 383 /* 384 * If it's atomic_write, it's just fine to keep write ordering. So 385 * here we don't need to wait for node write completion, since we use 386 * node chain which serializes node blocks. If one of node writes are 387 * reordered, we can see simply broken chain, resulting in stopping 388 * roll-forward recovery. It means we'll recover all or none node blocks 389 * given fsync mark. 390 */ 391 if (!atomic) { 392 ret = f2fs_wait_on_node_pages_writeback(sbi, seq_id); 393 if (ret) 394 goto out; 395 } 396 397 /* once recovery info is written, don't need to tack this */ 398 f2fs_remove_ino_entry(sbi, ino, APPEND_INO); 399 clear_inode_flag(inode, FI_APPEND_WRITE); 400 flush_out: 401 if (!atomic && F2FS_OPTION(sbi).fsync_mode != FSYNC_MODE_NOBARRIER) 402 ret = f2fs_issue_flush(sbi, inode->i_ino); 403 if (!ret) { 404 f2fs_remove_ino_entry(sbi, ino, UPDATE_INO); 405 clear_inode_flag(inode, FI_UPDATE_WRITE); 406 f2fs_remove_ino_entry(sbi, ino, FLUSH_INO); 407 } 408 f2fs_update_time(sbi, REQ_TIME); 409 out: 410 trace_f2fs_sync_file_exit(inode, cp_reason, datasync, ret); 411 return ret; 412 } 413 414 int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync) 415 { 416 if (unlikely(f2fs_cp_error(F2FS_I_SB(file_inode(file))))) 417 return -EIO; 418 return f2fs_do_sync_file(file, start, end, datasync, false); 419 } 420 421 static bool __found_offset(struct address_space *mapping, 422 struct dnode_of_data *dn, pgoff_t index, int whence) 423 { 424 block_t blkaddr = f2fs_data_blkaddr(dn); 425 struct inode *inode = mapping->host; 426 bool compressed_cluster = false; 427 428 if (f2fs_compressed_file(inode)) { 429 block_t first_blkaddr = data_blkaddr(dn->inode, dn->node_folio, 430 ALIGN_DOWN(dn->ofs_in_node, F2FS_I(inode)->i_cluster_size)); 431 432 compressed_cluster = first_blkaddr == COMPRESS_ADDR; 433 } 434 435 switch (whence) { 436 case SEEK_DATA: 437 if (__is_valid_data_blkaddr(blkaddr)) 438 return true; 439 if (blkaddr == NEW_ADDR && 440 xa_get_mark(&mapping->i_pages, index, PAGECACHE_TAG_DIRTY)) 441 return true; 442 if (compressed_cluster) 443 return true; 444 break; 445 case SEEK_HOLE: 446 if (compressed_cluster) 447 return false; 448 if (blkaddr == NULL_ADDR) 449 return true; 450 break; 451 } 452 return false; 453 } 454 455 static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence) 456 { 457 struct inode *inode = file->f_mapping->host; 458 loff_t maxbytes = F2FS_BLK_TO_BYTES(max_file_blocks(inode)); 459 struct dnode_of_data dn; 460 pgoff_t pgofs, end_offset; 461 loff_t data_ofs = offset; 462 loff_t isize; 463 int err = 0; 464 465 inode_lock_shared(inode); 466 467 isize = i_size_read(inode); 468 if (offset >= isize) 469 goto fail; 470 471 /* handle inline data case */ 472 if (f2fs_has_inline_data(inode)) { 473 if (whence == SEEK_HOLE) { 474 data_ofs = isize; 475 goto found; 476 } else if (whence == SEEK_DATA) { 477 data_ofs = offset; 478 goto found; 479 } 480 } 481 482 pgofs = (pgoff_t)(offset >> PAGE_SHIFT); 483 484 for (; data_ofs < isize; data_ofs = (loff_t)pgofs << PAGE_SHIFT) { 485 set_new_dnode(&dn, inode, NULL, NULL, 0); 486 err = f2fs_get_dnode_of_data(&dn, pgofs, LOOKUP_NODE); 487 if (err && err != -ENOENT) { 488 goto fail; 489 } else if (err == -ENOENT) { 490 /* direct node does not exists */ 491 if (whence == SEEK_DATA) { 492 pgofs = f2fs_get_next_page_offset(&dn, pgofs); 493 continue; 494 } else { 495 goto found; 496 } 497 } 498 499 end_offset = ADDRS_PER_PAGE(dn.node_folio, inode); 500 501 /* find data/hole in dnode block */ 502 for (; dn.ofs_in_node < end_offset; 503 dn.ofs_in_node++, pgofs++, 504 data_ofs = (loff_t)pgofs << PAGE_SHIFT) { 505 block_t blkaddr; 506 507 blkaddr = f2fs_data_blkaddr(&dn); 508 509 if (__is_valid_data_blkaddr(blkaddr) && 510 !f2fs_is_valid_blkaddr(F2FS_I_SB(inode), 511 blkaddr, DATA_GENERIC_ENHANCE)) { 512 f2fs_put_dnode(&dn); 513 goto fail; 514 } 515 516 if (__found_offset(file->f_mapping, &dn, 517 pgofs, whence)) { 518 f2fs_put_dnode(&dn); 519 goto found; 520 } 521 } 522 f2fs_put_dnode(&dn); 523 } 524 525 if (whence == SEEK_DATA) 526 goto fail; 527 found: 528 if (whence == SEEK_HOLE && data_ofs > isize) 529 data_ofs = isize; 530 inode_unlock_shared(inode); 531 return vfs_setpos(file, data_ofs, maxbytes); 532 fail: 533 inode_unlock_shared(inode); 534 return -ENXIO; 535 } 536 537 static loff_t f2fs_llseek(struct file *file, loff_t offset, int whence) 538 { 539 struct inode *inode = file->f_mapping->host; 540 loff_t maxbytes = F2FS_BLK_TO_BYTES(max_file_blocks(inode)); 541 542 switch (whence) { 543 case SEEK_SET: 544 case SEEK_CUR: 545 case SEEK_END: 546 return generic_file_llseek_size(file, offset, whence, 547 maxbytes, i_size_read(inode)); 548 case SEEK_DATA: 549 case SEEK_HOLE: 550 if (offset < 0) 551 return -ENXIO; 552 return f2fs_seek_block(file, offset, whence); 553 } 554 555 return -EINVAL; 556 } 557 558 static int f2fs_file_mmap_prepare(struct vm_area_desc *desc) 559 { 560 struct file *file = desc->file; 561 struct inode *inode = file_inode(file); 562 563 if (unlikely(f2fs_cp_error(F2FS_I_SB(inode)))) 564 return -EIO; 565 566 if (!f2fs_is_compress_backend_ready(inode)) 567 return -EOPNOTSUPP; 568 569 file_accessed(file); 570 desc->vm_ops = &f2fs_file_vm_ops; 571 572 f2fs_down_read(&F2FS_I(inode)->i_sem); 573 set_inode_flag(inode, FI_MMAP_FILE); 574 f2fs_up_read(&F2FS_I(inode)->i_sem); 575 576 return 0; 577 } 578 579 static int finish_preallocate_blocks(struct inode *inode) 580 { 581 int ret = 0; 582 bool opened; 583 584 f2fs_down_read(&F2FS_I(inode)->i_sem); 585 opened = is_inode_flag_set(inode, FI_OPENED_FILE); 586 f2fs_up_read(&F2FS_I(inode)->i_sem); 587 if (opened) 588 return 0; 589 590 inode_lock(inode); 591 if (is_inode_flag_set(inode, FI_OPENED_FILE)) 592 goto out_unlock; 593 594 if (!file_should_truncate(inode)) 595 goto out_update; 596 597 f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); 598 filemap_invalidate_lock(inode->i_mapping); 599 600 truncate_setsize(inode, i_size_read(inode)); 601 ret = f2fs_truncate(inode); 602 603 filemap_invalidate_unlock(inode->i_mapping); 604 f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); 605 if (ret) 606 goto out_unlock; 607 608 file_dont_truncate(inode); 609 out_update: 610 f2fs_down_write(&F2FS_I(inode)->i_sem); 611 set_inode_flag(inode, FI_OPENED_FILE); 612 f2fs_up_write(&F2FS_I(inode)->i_sem); 613 out_unlock: 614 inode_unlock(inode); 615 return ret; 616 } 617 618 static int f2fs_file_open(struct inode *inode, struct file *filp) 619 { 620 int err = fscrypt_file_open(inode, filp); 621 622 if (err) 623 return err; 624 625 if (!f2fs_is_compress_backend_ready(inode)) 626 return -EOPNOTSUPP; 627 628 if (mapping_large_folio_support(inode->i_mapping) && 629 filp->f_mode & FMODE_WRITE) 630 return -EOPNOTSUPP; 631 632 err = fsverity_file_open(inode, filp); 633 if (err) 634 return err; 635 636 filp->f_mode |= FMODE_NOWAIT; 637 filp->f_mode |= FMODE_CAN_ODIRECT; 638 639 err = dquot_file_open(inode, filp); 640 if (err) 641 return err; 642 643 err = finish_preallocate_blocks(inode); 644 if (!err) 645 atomic_inc(&F2FS_I(inode)->open_count); 646 return err; 647 } 648 649 void f2fs_truncate_data_blocks_range(struct dnode_of_data *dn, int count) 650 { 651 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); 652 int nr_free = 0, ofs = dn->ofs_in_node, len = count; 653 __le32 *addr; 654 bool compressed_cluster = false; 655 int cluster_index = 0, valid_blocks = 0; 656 int cluster_size = F2FS_I(dn->inode)->i_cluster_size; 657 bool released = !atomic_read(&F2FS_I(dn->inode)->i_compr_blocks); 658 block_t blkstart; 659 int blklen = 0; 660 661 addr = get_dnode_addr(dn->inode, dn->node_folio) + ofs; 662 blkstart = le32_to_cpu(*addr); 663 664 /* Assumption: truncation starts with cluster */ 665 for (; count > 0; count--, addr++, dn->ofs_in_node++, cluster_index++) { 666 block_t blkaddr = le32_to_cpu(*addr); 667 668 if (f2fs_compressed_file(dn->inode) && 669 !(cluster_index & (cluster_size - 1))) { 670 if (compressed_cluster) 671 f2fs_i_compr_blocks_update(dn->inode, 672 valid_blocks, false); 673 compressed_cluster = (blkaddr == COMPRESS_ADDR); 674 valid_blocks = 0; 675 } 676 677 if (blkaddr == NULL_ADDR) 678 goto next; 679 680 f2fs_set_data_blkaddr(dn, NULL_ADDR); 681 682 if (__is_valid_data_blkaddr(blkaddr)) { 683 if (time_to_inject(sbi, FAULT_BLKADDR_CONSISTENCE)) 684 goto next; 685 if (!f2fs_is_valid_blkaddr_raw(sbi, blkaddr, 686 DATA_GENERIC_ENHANCE)) 687 goto next; 688 if (compressed_cluster) 689 valid_blocks++; 690 } 691 692 if (blkstart + blklen == blkaddr) { 693 blklen++; 694 } else { 695 f2fs_invalidate_blocks(sbi, blkstart, blklen); 696 blkstart = blkaddr; 697 blklen = 1; 698 } 699 700 if (!released || blkaddr != COMPRESS_ADDR) 701 nr_free++; 702 703 continue; 704 705 next: 706 if (blklen) 707 f2fs_invalidate_blocks(sbi, blkstart, blklen); 708 709 blkstart = le32_to_cpu(*(addr + 1)); 710 blklen = 0; 711 } 712 713 if (blklen) 714 f2fs_invalidate_blocks(sbi, blkstart, blklen); 715 716 if (compressed_cluster) 717 f2fs_i_compr_blocks_update(dn->inode, valid_blocks, false); 718 719 if (nr_free) { 720 pgoff_t fofs; 721 /* 722 * once we invalidate valid blkaddr in range [ofs, ofs + count], 723 * we will invalidate all blkaddr in the whole range. 724 */ 725 fofs = f2fs_start_bidx_of_node(ofs_of_node(dn->node_folio), 726 dn->inode) + ofs; 727 f2fs_update_read_extent_cache_range(dn, fofs, 0, len); 728 f2fs_update_age_extent_cache_range(dn, fofs, len); 729 dec_valid_block_count(sbi, dn->inode, nr_free); 730 } 731 dn->ofs_in_node = ofs; 732 733 f2fs_update_time(sbi, REQ_TIME); 734 trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid, 735 dn->ofs_in_node, nr_free); 736 } 737 738 static int truncate_partial_data_page(struct inode *inode, u64 from, 739 bool cache_only) 740 { 741 loff_t offset = from & (PAGE_SIZE - 1); 742 pgoff_t index = from >> PAGE_SHIFT; 743 struct address_space *mapping = inode->i_mapping; 744 struct folio *folio; 745 746 if (!offset && !cache_only) 747 return 0; 748 749 if (cache_only) { 750 folio = filemap_lock_folio(mapping, index); 751 if (IS_ERR(folio)) 752 return 0; 753 if (folio_test_uptodate(folio)) 754 goto truncate_out; 755 f2fs_folio_put(folio, true); 756 return 0; 757 } 758 759 folio = f2fs_get_lock_data_folio(inode, index, true); 760 if (IS_ERR(folio)) 761 return PTR_ERR(folio) == -ENOENT ? 0 : PTR_ERR(folio); 762 truncate_out: 763 f2fs_folio_wait_writeback(folio, DATA, true, true); 764 folio_zero_segment(folio, offset, folio_size(folio)); 765 766 /* An encrypted inode should have a key and truncate the last page. */ 767 f2fs_bug_on(F2FS_I_SB(inode), cache_only && IS_ENCRYPTED(inode)); 768 if (!cache_only) 769 folio_mark_dirty(folio); 770 f2fs_folio_put(folio, true); 771 return 0; 772 } 773 774 int f2fs_do_truncate_blocks(struct inode *inode, u64 from, bool lock) 775 { 776 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 777 struct dnode_of_data dn; 778 struct f2fs_lock_context lc; 779 pgoff_t free_from; 780 int count = 0, err = 0; 781 struct folio *ifolio; 782 bool truncate_page = false; 783 784 trace_f2fs_truncate_blocks_enter(inode, from); 785 786 if (IS_DEVICE_ALIASING(inode) && from) { 787 err = -EINVAL; 788 goto out_err; 789 } 790 791 free_from = (pgoff_t)F2FS_BLK_ALIGN(from); 792 793 if (free_from >= max_file_blocks(inode)) 794 goto free_partial; 795 796 if (lock) 797 f2fs_lock_op(sbi, &lc); 798 799 ifolio = f2fs_get_inode_folio(sbi, inode->i_ino); 800 if (IS_ERR(ifolio)) { 801 err = PTR_ERR(ifolio); 802 goto out; 803 } 804 805 if (IS_DEVICE_ALIASING(inode)) { 806 struct extent_tree *et = F2FS_I(inode)->extent_tree[EX_READ]; 807 struct extent_info ei = et->largest; 808 809 f2fs_invalidate_blocks(sbi, ei.blk, ei.len); 810 811 dec_valid_block_count(sbi, inode, ei.len); 812 f2fs_update_time(sbi, REQ_TIME); 813 814 f2fs_folio_put(ifolio, true); 815 goto out; 816 } 817 818 if (f2fs_has_inline_data(inode)) { 819 f2fs_truncate_inline_inode(inode, ifolio, from); 820 f2fs_folio_put(ifolio, true); 821 truncate_page = true; 822 goto out; 823 } 824 825 set_new_dnode(&dn, inode, ifolio, NULL, 0); 826 err = f2fs_get_dnode_of_data(&dn, free_from, LOOKUP_NODE_RA); 827 if (err) { 828 if (err == -ENOENT) 829 goto free_next; 830 goto out; 831 } 832 833 count = ADDRS_PER_PAGE(dn.node_folio, inode); 834 835 count -= dn.ofs_in_node; 836 f2fs_bug_on(sbi, count < 0); 837 838 if (dn.ofs_in_node || IS_INODE(dn.node_folio)) { 839 f2fs_truncate_data_blocks_range(&dn, count); 840 free_from += count; 841 } 842 843 f2fs_put_dnode(&dn); 844 free_next: 845 err = f2fs_truncate_inode_blocks(inode, free_from); 846 out: 847 if (lock) 848 f2fs_unlock_op(sbi, &lc); 849 free_partial: 850 /* lastly zero out the first data page */ 851 if (!err) 852 err = truncate_partial_data_page(inode, from, truncate_page); 853 out_err: 854 trace_f2fs_truncate_blocks_exit(inode, err); 855 return err; 856 } 857 858 int f2fs_truncate_blocks(struct inode *inode, u64 from, bool lock) 859 { 860 u64 free_from = from; 861 int err; 862 863 #ifdef CONFIG_F2FS_FS_COMPRESSION 864 /* 865 * for compressed file, only support cluster size 866 * aligned truncation. 867 */ 868 if (f2fs_compressed_file(inode)) 869 free_from = round_up(from, 870 F2FS_I(inode)->i_cluster_size << PAGE_SHIFT); 871 #endif 872 873 err = f2fs_do_truncate_blocks(inode, free_from, lock); 874 if (err) 875 return err; 876 877 #ifdef CONFIG_F2FS_FS_COMPRESSION 878 /* 879 * For compressed file, after release compress blocks, don't allow write 880 * direct, but we should allow write direct after truncate to zero. 881 */ 882 if (f2fs_compressed_file(inode) && !free_from 883 && is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) 884 clear_inode_flag(inode, FI_COMPRESS_RELEASED); 885 886 if (from != free_from) { 887 err = f2fs_truncate_partial_cluster(inode, from, lock); 888 if (err) 889 return err; 890 } 891 #endif 892 893 return 0; 894 } 895 896 int f2fs_truncate(struct inode *inode) 897 { 898 int err; 899 900 if (unlikely(f2fs_cp_error(F2FS_I_SB(inode)))) 901 return -EIO; 902 903 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || 904 S_ISLNK(inode->i_mode))) 905 return 0; 906 907 trace_f2fs_truncate(inode); 908 909 if (time_to_inject(F2FS_I_SB(inode), FAULT_TRUNCATE)) 910 return -EIO; 911 912 err = f2fs_dquot_initialize(inode); 913 if (err) 914 return err; 915 916 /* we should check inline_data size */ 917 if (!f2fs_may_inline_data(inode)) { 918 err = f2fs_convert_inline_inode(inode); 919 if (err) { 920 /* 921 * Always truncate page #0 to avoid page cache 922 * leak in evict() path. 923 */ 924 truncate_inode_pages_range(inode->i_mapping, 925 F2FS_BLK_TO_BYTES(0), 926 F2FS_BLK_END_BYTES(0)); 927 return err; 928 } 929 } 930 931 err = f2fs_truncate_blocks(inode, i_size_read(inode), true); 932 if (err) 933 return err; 934 935 inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode)); 936 f2fs_mark_inode_dirty_sync(inode, false); 937 return 0; 938 } 939 940 static bool f2fs_force_buffered_io(struct inode *inode, int rw) 941 { 942 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 943 944 if (!fscrypt_dio_supported(inode)) 945 return true; 946 if (fsverity_active(inode)) 947 return true; 948 if (f2fs_compressed_file(inode)) 949 return true; 950 /* 951 * only force direct read to use buffered IO, for direct write, 952 * it expects inline data conversion before committing IO. 953 */ 954 if (f2fs_has_inline_data(inode) && rw == READ) 955 return true; 956 957 /* disallow direct IO if any of devices has unaligned blksize */ 958 if (f2fs_is_multi_device(sbi) && !sbi->aligned_blksize) 959 return true; 960 /* 961 * for blkzoned device, fallback direct IO to buffered IO, so 962 * all IOs can be serialized by log-structured write. 963 */ 964 if (f2fs_sb_has_blkzoned(sbi) && (rw == WRITE) && 965 !f2fs_is_pinned_file(inode)) 966 return true; 967 if (is_sbi_flag_set(sbi, SBI_CP_DISABLED)) 968 return true; 969 970 return false; 971 } 972 973 int f2fs_getattr(struct mnt_idmap *idmap, const struct path *path, 974 struct kstat *stat, u32 request_mask, unsigned int query_flags) 975 { 976 struct inode *inode = d_inode(path->dentry); 977 struct f2fs_inode_info *fi = F2FS_I(inode); 978 struct f2fs_inode *ri = NULL; 979 unsigned int flags; 980 981 if (f2fs_has_extra_attr(inode) && 982 f2fs_sb_has_inode_crtime(F2FS_I_SB(inode)) && 983 F2FS_FITS_IN_INODE(ri, fi->i_extra_isize, i_crtime)) { 984 stat->result_mask |= STATX_BTIME; 985 stat->btime.tv_sec = fi->i_crtime.tv_sec; 986 stat->btime.tv_nsec = fi->i_crtime.tv_nsec; 987 } 988 989 /* 990 * Return the DIO alignment restrictions if requested. We only return 991 * this information when requested, since on encrypted files it might 992 * take a fair bit of work to get if the file wasn't opened recently. 993 * 994 * f2fs sometimes supports DIO reads but not DIO writes. STATX_DIOALIGN 995 * cannot represent that, so in that case we report no DIO support. 996 */ 997 if ((request_mask & STATX_DIOALIGN) && S_ISREG(inode->i_mode)) { 998 unsigned int bsize = i_blocksize(inode); 999 1000 stat->result_mask |= STATX_DIOALIGN; 1001 if (!f2fs_force_buffered_io(inode, WRITE)) { 1002 stat->dio_mem_align = bsize; 1003 stat->dio_offset_align = bsize; 1004 } 1005 } 1006 1007 flags = fi->i_flags; 1008 if (flags & F2FS_COMPR_FL) 1009 stat->attributes |= STATX_ATTR_COMPRESSED; 1010 if (flags & F2FS_APPEND_FL) 1011 stat->attributes |= STATX_ATTR_APPEND; 1012 if (IS_ENCRYPTED(inode)) 1013 stat->attributes |= STATX_ATTR_ENCRYPTED; 1014 if (flags & F2FS_IMMUTABLE_FL) 1015 stat->attributes |= STATX_ATTR_IMMUTABLE; 1016 if (flags & F2FS_NODUMP_FL) 1017 stat->attributes |= STATX_ATTR_NODUMP; 1018 if (IS_VERITY(inode)) 1019 stat->attributes |= STATX_ATTR_VERITY; 1020 1021 stat->attributes_mask |= (STATX_ATTR_COMPRESSED | 1022 STATX_ATTR_APPEND | 1023 STATX_ATTR_ENCRYPTED | 1024 STATX_ATTR_IMMUTABLE | 1025 STATX_ATTR_NODUMP | 1026 STATX_ATTR_VERITY); 1027 1028 generic_fillattr(idmap, request_mask, inode, stat); 1029 1030 /* we need to show initial sectors used for inline_data/dentries */ 1031 if ((S_ISREG(inode->i_mode) && f2fs_has_inline_data(inode)) || 1032 f2fs_has_inline_dentry(inode)) 1033 stat->blocks += (stat->size + 511) >> 9; 1034 1035 return 0; 1036 } 1037 1038 #ifdef CONFIG_F2FS_FS_POSIX_ACL 1039 static void __setattr_copy(struct mnt_idmap *idmap, 1040 struct inode *inode, const struct iattr *attr) 1041 { 1042 unsigned int ia_valid = attr->ia_valid; 1043 1044 i_uid_update(idmap, attr, inode); 1045 i_gid_update(idmap, attr, inode); 1046 if (ia_valid & ATTR_ATIME) 1047 inode_set_atime_to_ts(inode, attr->ia_atime); 1048 if (ia_valid & ATTR_MTIME) 1049 inode_set_mtime_to_ts(inode, attr->ia_mtime); 1050 if (ia_valid & ATTR_CTIME) 1051 inode_set_ctime_to_ts(inode, attr->ia_ctime); 1052 if (ia_valid & ATTR_MODE) { 1053 umode_t mode = attr->ia_mode; 1054 1055 if (!in_group_or_capable(idmap, inode, i_gid_into_vfsgid(idmap, inode))) 1056 mode &= ~S_ISGID; 1057 set_acl_inode(inode, mode); 1058 } 1059 } 1060 #else 1061 #define __setattr_copy setattr_copy 1062 #endif 1063 1064 int f2fs_setattr(struct mnt_idmap *idmap, struct dentry *dentry, 1065 struct iattr *attr) 1066 { 1067 struct inode *inode = d_inode(dentry); 1068 struct f2fs_inode_info *fi = F2FS_I(inode); 1069 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 1070 int err; 1071 1072 if (unlikely(f2fs_cp_error(sbi))) 1073 return -EIO; 1074 1075 err = setattr_prepare(idmap, dentry, attr); 1076 if (err) 1077 return err; 1078 1079 err = fscrypt_prepare_setattr(dentry, attr); 1080 if (err) 1081 return err; 1082 1083 if (unlikely(IS_IMMUTABLE(inode))) 1084 return -EPERM; 1085 1086 if (unlikely(IS_APPEND(inode) && 1087 (attr->ia_valid & (ATTR_MODE | ATTR_UID | 1088 ATTR_GID | ATTR_TIMES_SET)))) 1089 return -EPERM; 1090 1091 if ((attr->ia_valid & ATTR_SIZE)) { 1092 if (!f2fs_is_compress_backend_ready(inode) || 1093 IS_DEVICE_ALIASING(inode)) 1094 return -EOPNOTSUPP; 1095 if (is_inode_flag_set(inode, FI_COMPRESS_RELEASED) && 1096 !IS_ALIGNED(attr->ia_size, 1097 F2FS_BLK_TO_BYTES(fi->i_cluster_size))) 1098 return -EINVAL; 1099 /* 1100 * To prevent scattered pin block generation, we don't allow 1101 * smaller/equal size unaligned truncation for pinned file. 1102 * We only support overwrite IO to pinned file, so don't 1103 * care about larger size truncation. 1104 */ 1105 if (f2fs_is_pinned_file(inode) && 1106 attr->ia_size <= i_size_read(inode) && 1107 !IS_ALIGNED(attr->ia_size, 1108 F2FS_BLK_TO_BYTES(CAP_BLKS_PER_SEC(sbi)))) 1109 return -EINVAL; 1110 } 1111 1112 if (is_quota_modification(idmap, inode, attr)) { 1113 err = f2fs_dquot_initialize(inode); 1114 if (err) 1115 return err; 1116 } 1117 if (i_uid_needs_update(idmap, attr, inode) || 1118 i_gid_needs_update(idmap, attr, inode)) { 1119 struct f2fs_lock_context lc; 1120 1121 f2fs_lock_op(sbi, &lc); 1122 err = dquot_transfer(idmap, inode, attr); 1123 if (err) { 1124 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR); 1125 f2fs_unlock_op(sbi, &lc); 1126 return err; 1127 } 1128 /* 1129 * update uid/gid under lock_op(), so that dquot and inode can 1130 * be updated atomically. 1131 */ 1132 i_uid_update(idmap, attr, inode); 1133 i_gid_update(idmap, attr, inode); 1134 f2fs_mark_inode_dirty_sync(inode, true); 1135 f2fs_unlock_op(sbi, &lc); 1136 } 1137 1138 if (attr->ia_valid & ATTR_SIZE) { 1139 loff_t old_size = i_size_read(inode); 1140 1141 if (attr->ia_size > MAX_INLINE_DATA(inode)) { 1142 /* 1143 * should convert inline inode before i_size_write to 1144 * keep smaller than inline_data size with inline flag. 1145 */ 1146 err = f2fs_convert_inline_inode(inode); 1147 if (err) 1148 return err; 1149 } 1150 1151 /* 1152 * wait for inflight dio, blocks should be removed after 1153 * IO completion. 1154 */ 1155 if (attr->ia_size < old_size) 1156 inode_dio_wait(inode); 1157 1158 f2fs_down_write(&fi->i_gc_rwsem[WRITE]); 1159 filemap_invalidate_lock(inode->i_mapping); 1160 1161 if (attr->ia_size > old_size) 1162 f2fs_zero_post_eof_page(inode, attr->ia_size, false); 1163 truncate_setsize(inode, attr->ia_size); 1164 1165 if (attr->ia_size <= old_size) 1166 err = f2fs_truncate(inode); 1167 /* 1168 * do not trim all blocks after i_size if target size is 1169 * larger than i_size. 1170 */ 1171 filemap_invalidate_unlock(inode->i_mapping); 1172 f2fs_up_write(&fi->i_gc_rwsem[WRITE]); 1173 if (err) 1174 return err; 1175 1176 spin_lock(&fi->i_size_lock); 1177 inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode)); 1178 fi->last_disk_size = i_size_read(inode); 1179 spin_unlock(&fi->i_size_lock); 1180 } 1181 1182 __setattr_copy(idmap, inode, attr); 1183 1184 if (attr->ia_valid & ATTR_MODE) { 1185 err = posix_acl_chmod(idmap, dentry, f2fs_get_inode_mode(inode)); 1186 1187 if (is_inode_flag_set(inode, FI_ACL_MODE)) { 1188 if (!err) 1189 inode->i_mode = fi->i_acl_mode; 1190 clear_inode_flag(inode, FI_ACL_MODE); 1191 } 1192 } 1193 1194 /* file size may changed here */ 1195 f2fs_mark_inode_dirty_sync(inode, true); 1196 1197 /* inode change will produce dirty node pages flushed by checkpoint */ 1198 f2fs_balance_fs(sbi, true); 1199 1200 return err; 1201 } 1202 1203 const struct inode_operations f2fs_file_inode_operations = { 1204 .getattr = f2fs_getattr, 1205 .setattr = f2fs_setattr, 1206 .get_inode_acl = f2fs_get_acl, 1207 .set_acl = f2fs_set_acl, 1208 .listxattr = f2fs_listxattr, 1209 .fiemap = f2fs_fiemap, 1210 .fileattr_get = f2fs_fileattr_get, 1211 .fileattr_set = f2fs_fileattr_set, 1212 }; 1213 1214 static int fill_zero(struct inode *inode, pgoff_t index, 1215 loff_t start, loff_t len) 1216 { 1217 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 1218 struct folio *folio; 1219 struct f2fs_lock_context lc; 1220 1221 if (!len) 1222 return 0; 1223 1224 f2fs_balance_fs(sbi, true); 1225 1226 f2fs_lock_op(sbi, &lc); 1227 folio = f2fs_get_new_data_folio(inode, NULL, index, false); 1228 f2fs_unlock_op(sbi, &lc); 1229 1230 if (IS_ERR(folio)) 1231 return PTR_ERR(folio); 1232 1233 f2fs_folio_wait_writeback(folio, DATA, true, true); 1234 folio_zero_range(folio, start, len); 1235 folio_mark_dirty(folio); 1236 f2fs_folio_put(folio, true); 1237 return 0; 1238 } 1239 1240 int f2fs_truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end) 1241 { 1242 int err; 1243 1244 while (pg_start < pg_end) { 1245 struct dnode_of_data dn; 1246 pgoff_t end_offset, count; 1247 1248 set_new_dnode(&dn, inode, NULL, NULL, 0); 1249 err = f2fs_get_dnode_of_data(&dn, pg_start, LOOKUP_NODE); 1250 if (err) { 1251 if (err == -ENOENT) { 1252 pg_start = f2fs_get_next_page_offset(&dn, 1253 pg_start); 1254 continue; 1255 } 1256 return err; 1257 } 1258 1259 end_offset = ADDRS_PER_PAGE(dn.node_folio, inode); 1260 count = min(end_offset - dn.ofs_in_node, pg_end - pg_start); 1261 1262 f2fs_bug_on(F2FS_I_SB(inode), count == 0 || count > end_offset); 1263 1264 f2fs_truncate_data_blocks_range(&dn, count); 1265 f2fs_put_dnode(&dn); 1266 1267 pg_start += count; 1268 } 1269 return 0; 1270 } 1271 1272 static int f2fs_punch_hole(struct inode *inode, loff_t offset, loff_t len) 1273 { 1274 pgoff_t pg_start, pg_end; 1275 loff_t off_start, off_end; 1276 int ret; 1277 1278 ret = f2fs_convert_inline_inode(inode); 1279 if (ret) 1280 return ret; 1281 1282 f2fs_zero_post_eof_page(inode, offset + len, true); 1283 1284 pg_start = ((unsigned long long) offset) >> PAGE_SHIFT; 1285 pg_end = ((unsigned long long) offset + len) >> PAGE_SHIFT; 1286 1287 off_start = offset & (PAGE_SIZE - 1); 1288 off_end = (offset + len) & (PAGE_SIZE - 1); 1289 1290 if (pg_start == pg_end) { 1291 ret = fill_zero(inode, pg_start, off_start, 1292 off_end - off_start); 1293 if (ret) 1294 return ret; 1295 } else { 1296 if (off_start) { 1297 ret = fill_zero(inode, pg_start++, off_start, 1298 PAGE_SIZE - off_start); 1299 if (ret) 1300 return ret; 1301 } 1302 if (off_end) { 1303 ret = fill_zero(inode, pg_end, 0, off_end); 1304 if (ret) 1305 return ret; 1306 } 1307 1308 if (pg_start < pg_end) { 1309 loff_t blk_start, blk_end; 1310 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 1311 struct f2fs_lock_context lc; 1312 1313 f2fs_balance_fs(sbi, true); 1314 1315 blk_start = (loff_t)pg_start << PAGE_SHIFT; 1316 blk_end = (loff_t)pg_end << PAGE_SHIFT; 1317 1318 f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); 1319 filemap_invalidate_lock(inode->i_mapping); 1320 1321 truncate_pagecache_range(inode, blk_start, blk_end - 1); 1322 1323 f2fs_lock_op(sbi, &lc); 1324 ret = f2fs_truncate_hole(inode, pg_start, pg_end); 1325 f2fs_unlock_op(sbi, &lc); 1326 1327 filemap_invalidate_unlock(inode->i_mapping); 1328 f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); 1329 } 1330 } 1331 1332 return ret; 1333 } 1334 1335 static int __read_out_blkaddrs(struct inode *inode, block_t *blkaddr, 1336 int *do_replace, pgoff_t off, pgoff_t len) 1337 { 1338 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 1339 struct dnode_of_data dn; 1340 int ret, done, i; 1341 1342 next_dnode: 1343 set_new_dnode(&dn, inode, NULL, NULL, 0); 1344 ret = f2fs_get_dnode_of_data(&dn, off, LOOKUP_NODE_RA); 1345 if (ret && ret != -ENOENT) { 1346 return ret; 1347 } else if (ret == -ENOENT) { 1348 if (dn.max_level == 0) 1349 return -ENOENT; 1350 done = min((pgoff_t)ADDRS_PER_BLOCK(inode) - 1351 dn.ofs_in_node, len); 1352 blkaddr += done; 1353 do_replace += done; 1354 goto next; 1355 } 1356 1357 done = min((pgoff_t)ADDRS_PER_PAGE(dn.node_folio, inode) - 1358 dn.ofs_in_node, len); 1359 for (i = 0; i < done; i++, blkaddr++, do_replace++, dn.ofs_in_node++) { 1360 *blkaddr = f2fs_data_blkaddr(&dn); 1361 1362 if (__is_valid_data_blkaddr(*blkaddr) && 1363 !f2fs_is_valid_blkaddr(sbi, *blkaddr, 1364 DATA_GENERIC_ENHANCE)) { 1365 f2fs_put_dnode(&dn); 1366 return -EFSCORRUPTED; 1367 } 1368 1369 if (!f2fs_is_checkpointed_data(sbi, *blkaddr)) { 1370 1371 if (f2fs_lfs_mode(sbi)) { 1372 f2fs_put_dnode(&dn); 1373 return -EOPNOTSUPP; 1374 } 1375 1376 /* do not invalidate this block address */ 1377 f2fs_update_data_blkaddr(&dn, NULL_ADDR); 1378 *do_replace = 1; 1379 } 1380 } 1381 f2fs_put_dnode(&dn); 1382 next: 1383 len -= done; 1384 off += done; 1385 if (len) 1386 goto next_dnode; 1387 return 0; 1388 } 1389 1390 static int __roll_back_blkaddrs(struct inode *inode, block_t *blkaddr, 1391 int *do_replace, pgoff_t off, int len) 1392 { 1393 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 1394 struct dnode_of_data dn; 1395 int ret, i; 1396 1397 for (i = 0; i < len; i++, do_replace++, blkaddr++) { 1398 if (*do_replace == 0) 1399 continue; 1400 1401 set_new_dnode(&dn, inode, NULL, NULL, 0); 1402 ret = f2fs_get_dnode_of_data(&dn, off + i, LOOKUP_NODE_RA); 1403 if (ret) { 1404 dec_valid_block_count(sbi, inode, 1); 1405 f2fs_invalidate_blocks(sbi, *blkaddr, 1); 1406 } else { 1407 f2fs_update_data_blkaddr(&dn, *blkaddr); 1408 } 1409 f2fs_put_dnode(&dn); 1410 } 1411 return 0; 1412 } 1413 1414 static int __clone_blkaddrs(struct inode *src_inode, struct inode *dst_inode, 1415 block_t *blkaddr, int *do_replace, 1416 pgoff_t src, pgoff_t dst, pgoff_t len, bool full) 1417 { 1418 struct f2fs_sb_info *sbi = F2FS_I_SB(src_inode); 1419 pgoff_t i = 0; 1420 int ret; 1421 1422 while (i < len) { 1423 if (blkaddr[i] == NULL_ADDR && !full) { 1424 i++; 1425 continue; 1426 } 1427 1428 if (do_replace[i] || blkaddr[i] == NULL_ADDR) { 1429 struct dnode_of_data dn; 1430 struct node_info ni; 1431 size_t new_size; 1432 pgoff_t ilen; 1433 1434 set_new_dnode(&dn, dst_inode, NULL, NULL, 0); 1435 ret = f2fs_get_dnode_of_data(&dn, dst + i, ALLOC_NODE); 1436 if (ret) 1437 return ret; 1438 1439 ret = f2fs_get_node_info(sbi, dn.nid, &ni, false); 1440 if (ret) { 1441 f2fs_put_dnode(&dn); 1442 return ret; 1443 } 1444 1445 ilen = min((pgoff_t) 1446 ADDRS_PER_PAGE(dn.node_folio, dst_inode) - 1447 dn.ofs_in_node, len - i); 1448 do { 1449 dn.data_blkaddr = f2fs_data_blkaddr(&dn); 1450 f2fs_truncate_data_blocks_range(&dn, 1); 1451 1452 if (do_replace[i]) { 1453 f2fs_i_blocks_write(src_inode, 1454 1, false, false); 1455 f2fs_i_blocks_write(dst_inode, 1456 1, true, false); 1457 f2fs_replace_block(sbi, &dn, dn.data_blkaddr, 1458 blkaddr[i], ni.version, true, false); 1459 1460 do_replace[i] = 0; 1461 } 1462 dn.ofs_in_node++; 1463 i++; 1464 new_size = (loff_t)(dst + i) << PAGE_SHIFT; 1465 if (dst_inode->i_size < new_size) 1466 f2fs_i_size_write(dst_inode, new_size); 1467 } while (--ilen && (do_replace[i] || blkaddr[i] == NULL_ADDR)); 1468 1469 f2fs_put_dnode(&dn); 1470 } else { 1471 struct folio *fsrc, *fdst; 1472 1473 fsrc = f2fs_get_lock_data_folio(src_inode, 1474 src + i, true); 1475 if (IS_ERR(fsrc)) 1476 return PTR_ERR(fsrc); 1477 fdst = f2fs_get_new_data_folio(dst_inode, NULL, dst + i, 1478 true); 1479 if (IS_ERR(fdst)) { 1480 f2fs_folio_put(fsrc, true); 1481 return PTR_ERR(fdst); 1482 } 1483 1484 f2fs_folio_wait_writeback(fdst, DATA, true, true); 1485 1486 memcpy_folio(fdst, 0, fsrc, 0, PAGE_SIZE); 1487 folio_mark_dirty(fdst); 1488 folio_set_f2fs_gcing(fdst); 1489 f2fs_folio_put(fdst, true); 1490 f2fs_folio_put(fsrc, true); 1491 1492 ret = f2fs_truncate_hole(src_inode, 1493 src + i, src + i + 1); 1494 if (ret) 1495 return ret; 1496 i++; 1497 } 1498 } 1499 return 0; 1500 } 1501 1502 static int __exchange_data_block(struct inode *src_inode, 1503 struct inode *dst_inode, pgoff_t src, pgoff_t dst, 1504 pgoff_t len, bool full) 1505 { 1506 block_t *src_blkaddr; 1507 int *do_replace; 1508 pgoff_t olen; 1509 int ret; 1510 1511 while (len) { 1512 olen = min((pgoff_t)4 * ADDRS_PER_BLOCK(src_inode), len); 1513 1514 src_blkaddr = f2fs_kvzalloc(F2FS_I_SB(src_inode), 1515 array_size(olen, sizeof(block_t)), 1516 GFP_NOFS); 1517 if (!src_blkaddr) 1518 return -ENOMEM; 1519 1520 do_replace = f2fs_kvzalloc(F2FS_I_SB(src_inode), 1521 array_size(olen, sizeof(int)), 1522 GFP_NOFS); 1523 if (!do_replace) { 1524 kvfree(src_blkaddr); 1525 return -ENOMEM; 1526 } 1527 1528 ret = __read_out_blkaddrs(src_inode, src_blkaddr, 1529 do_replace, src, olen); 1530 if (ret) 1531 goto roll_back; 1532 1533 ret = __clone_blkaddrs(src_inode, dst_inode, src_blkaddr, 1534 do_replace, src, dst, olen, full); 1535 if (ret) 1536 goto roll_back; 1537 1538 src += olen; 1539 dst += olen; 1540 len -= olen; 1541 1542 kvfree(src_blkaddr); 1543 kvfree(do_replace); 1544 } 1545 return 0; 1546 1547 roll_back: 1548 __roll_back_blkaddrs(src_inode, src_blkaddr, do_replace, src, olen); 1549 kvfree(src_blkaddr); 1550 kvfree(do_replace); 1551 return ret; 1552 } 1553 1554 static int f2fs_do_collapse(struct inode *inode, loff_t offset, loff_t len) 1555 { 1556 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 1557 struct f2fs_lock_context lc; 1558 pgoff_t nrpages = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE); 1559 pgoff_t start = offset >> PAGE_SHIFT; 1560 pgoff_t end = (offset + len) >> PAGE_SHIFT; 1561 int ret; 1562 1563 f2fs_balance_fs(sbi, true); 1564 1565 /* avoid gc operation during block exchange */ 1566 f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); 1567 filemap_invalidate_lock(inode->i_mapping); 1568 1569 f2fs_zero_post_eof_page(inode, offset + len, false); 1570 1571 f2fs_lock_op(sbi, &lc); 1572 f2fs_drop_extent_tree(inode); 1573 truncate_pagecache(inode, offset); 1574 ret = __exchange_data_block(inode, inode, end, start, nrpages - end, true); 1575 f2fs_unlock_op(sbi, &lc); 1576 1577 filemap_invalidate_unlock(inode->i_mapping); 1578 f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); 1579 return ret; 1580 } 1581 1582 static int f2fs_collapse_range(struct inode *inode, loff_t offset, loff_t len) 1583 { 1584 loff_t new_size; 1585 int ret; 1586 1587 if (offset + len >= i_size_read(inode)) 1588 return -EINVAL; 1589 1590 /* collapse range should be aligned to block size of f2fs. */ 1591 if (offset & (F2FS_BLKSIZE - 1) || len & (F2FS_BLKSIZE - 1)) 1592 return -EINVAL; 1593 1594 ret = f2fs_convert_inline_inode(inode); 1595 if (ret) 1596 return ret; 1597 1598 /* write out all dirty pages from offset */ 1599 ret = filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX); 1600 if (ret) 1601 return ret; 1602 1603 ret = f2fs_do_collapse(inode, offset, len); 1604 if (ret) 1605 return ret; 1606 1607 /* write out all moved pages, if possible */ 1608 filemap_invalidate_lock(inode->i_mapping); 1609 filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX); 1610 truncate_pagecache(inode, offset); 1611 1612 new_size = i_size_read(inode) - len; 1613 ret = f2fs_truncate_blocks(inode, new_size, true); 1614 filemap_invalidate_unlock(inode->i_mapping); 1615 if (!ret) 1616 f2fs_i_size_write(inode, new_size); 1617 return ret; 1618 } 1619 1620 static int f2fs_do_zero_range(struct dnode_of_data *dn, pgoff_t start, 1621 pgoff_t end) 1622 { 1623 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); 1624 pgoff_t index = start; 1625 unsigned int ofs_in_node = dn->ofs_in_node; 1626 blkcnt_t count = 0; 1627 int ret; 1628 1629 for (; index < end; index++, dn->ofs_in_node++) { 1630 if (f2fs_data_blkaddr(dn) == NULL_ADDR) 1631 count++; 1632 } 1633 1634 dn->ofs_in_node = ofs_in_node; 1635 ret = f2fs_reserve_new_blocks(dn, count); 1636 if (ret) 1637 return ret; 1638 1639 dn->ofs_in_node = ofs_in_node; 1640 for (index = start; index < end; index++, dn->ofs_in_node++) { 1641 dn->data_blkaddr = f2fs_data_blkaddr(dn); 1642 /* 1643 * f2fs_reserve_new_blocks will not guarantee entire block 1644 * allocation. 1645 */ 1646 if (dn->data_blkaddr == NULL_ADDR) { 1647 ret = -ENOSPC; 1648 break; 1649 } 1650 1651 if (dn->data_blkaddr == NEW_ADDR) 1652 continue; 1653 1654 if (!f2fs_is_valid_blkaddr(sbi, dn->data_blkaddr, 1655 DATA_GENERIC_ENHANCE)) { 1656 ret = -EFSCORRUPTED; 1657 break; 1658 } 1659 1660 f2fs_invalidate_blocks(sbi, dn->data_blkaddr, 1); 1661 f2fs_set_data_blkaddr(dn, NEW_ADDR); 1662 } 1663 1664 if (index > start) { 1665 f2fs_update_read_extent_cache_range(dn, start, 0, 1666 index - start); 1667 f2fs_update_age_extent_cache_range(dn, start, index - start); 1668 } 1669 1670 return ret; 1671 } 1672 1673 static int f2fs_zero_range(struct inode *inode, loff_t offset, loff_t len, 1674 int mode) 1675 { 1676 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 1677 struct address_space *mapping = inode->i_mapping; 1678 pgoff_t index, pg_start, pg_end; 1679 loff_t new_size = i_size_read(inode); 1680 loff_t off_start, off_end; 1681 int ret = 0; 1682 1683 ret = inode_newsize_ok(inode, (len + offset)); 1684 if (ret) 1685 return ret; 1686 1687 ret = f2fs_convert_inline_inode(inode); 1688 if (ret) 1689 return ret; 1690 1691 ret = filemap_write_and_wait_range(mapping, offset, offset + len - 1); 1692 if (ret) 1693 return ret; 1694 1695 f2fs_zero_post_eof_page(inode, offset + len, true); 1696 1697 pg_start = ((unsigned long long) offset) >> PAGE_SHIFT; 1698 pg_end = ((unsigned long long) offset + len) >> PAGE_SHIFT; 1699 1700 off_start = offset & (PAGE_SIZE - 1); 1701 off_end = (offset + len) & (PAGE_SIZE - 1); 1702 1703 if (pg_start == pg_end) { 1704 ret = fill_zero(inode, pg_start, off_start, 1705 off_end - off_start); 1706 if (ret) 1707 return ret; 1708 1709 new_size = max_t(loff_t, new_size, offset + len); 1710 } else { 1711 if (off_start) { 1712 ret = fill_zero(inode, pg_start++, off_start, 1713 PAGE_SIZE - off_start); 1714 if (ret) 1715 return ret; 1716 1717 new_size = max_t(loff_t, new_size, 1718 (loff_t)pg_start << PAGE_SHIFT); 1719 } 1720 1721 for (index = pg_start; index < pg_end;) { 1722 struct dnode_of_data dn; 1723 struct f2fs_lock_context lc; 1724 unsigned int end_offset; 1725 pgoff_t end; 1726 1727 f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); 1728 filemap_invalidate_lock(mapping); 1729 1730 truncate_pagecache_range(inode, 1731 (loff_t)index << PAGE_SHIFT, 1732 ((loff_t)pg_end << PAGE_SHIFT) - 1); 1733 1734 f2fs_lock_op(sbi, &lc); 1735 1736 set_new_dnode(&dn, inode, NULL, NULL, 0); 1737 ret = f2fs_get_dnode_of_data(&dn, index, ALLOC_NODE); 1738 if (ret) { 1739 f2fs_unlock_op(sbi, &lc); 1740 filemap_invalidate_unlock(mapping); 1741 f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); 1742 goto out; 1743 } 1744 1745 end_offset = ADDRS_PER_PAGE(dn.node_folio, inode); 1746 end = min(pg_end, end_offset - dn.ofs_in_node + index); 1747 1748 ret = f2fs_do_zero_range(&dn, index, end); 1749 f2fs_put_dnode(&dn); 1750 1751 f2fs_unlock_op(sbi, &lc); 1752 filemap_invalidate_unlock(mapping); 1753 f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); 1754 1755 f2fs_balance_fs(sbi, dn.node_changed); 1756 1757 if (ret) 1758 goto out; 1759 1760 index = end; 1761 new_size = max_t(loff_t, new_size, 1762 (loff_t)index << PAGE_SHIFT); 1763 } 1764 1765 if (off_end) { 1766 ret = fill_zero(inode, pg_end, 0, off_end); 1767 if (ret) 1768 goto out; 1769 1770 new_size = max_t(loff_t, new_size, offset + len); 1771 } 1772 } 1773 1774 out: 1775 if (new_size > i_size_read(inode)) { 1776 if (mode & FALLOC_FL_KEEP_SIZE) 1777 file_set_keep_isize(inode); 1778 else 1779 f2fs_i_size_write(inode, new_size); 1780 } 1781 return ret; 1782 } 1783 1784 static int f2fs_insert_range(struct inode *inode, loff_t offset, loff_t len) 1785 { 1786 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 1787 struct address_space *mapping = inode->i_mapping; 1788 pgoff_t nr, pg_start, pg_end, delta, idx; 1789 loff_t new_size; 1790 int ret = 0; 1791 1792 new_size = i_size_read(inode) + len; 1793 ret = inode_newsize_ok(inode, new_size); 1794 if (ret) 1795 return ret; 1796 1797 if (offset >= i_size_read(inode)) 1798 return -EINVAL; 1799 1800 /* insert range should be aligned to block size of f2fs. */ 1801 if (offset & (F2FS_BLKSIZE - 1) || len & (F2FS_BLKSIZE - 1)) 1802 return -EINVAL; 1803 1804 ret = f2fs_convert_inline_inode(inode); 1805 if (ret) 1806 return ret; 1807 1808 f2fs_balance_fs(sbi, true); 1809 1810 filemap_invalidate_lock(mapping); 1811 ret = f2fs_truncate_blocks(inode, i_size_read(inode), true); 1812 filemap_invalidate_unlock(mapping); 1813 if (ret) 1814 return ret; 1815 1816 /* write out all dirty pages from offset */ 1817 ret = filemap_write_and_wait_range(mapping, offset, LLONG_MAX); 1818 if (ret) 1819 return ret; 1820 1821 pg_start = offset >> PAGE_SHIFT; 1822 pg_end = (offset + len) >> PAGE_SHIFT; 1823 delta = pg_end - pg_start; 1824 idx = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE); 1825 1826 /* avoid gc operation during block exchange */ 1827 f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); 1828 filemap_invalidate_lock(mapping); 1829 1830 f2fs_zero_post_eof_page(inode, offset + len, false); 1831 truncate_pagecache(inode, offset); 1832 1833 while (!ret && idx > pg_start) { 1834 struct f2fs_lock_context lc; 1835 1836 nr = idx - pg_start; 1837 if (nr > delta) 1838 nr = delta; 1839 idx -= nr; 1840 1841 f2fs_lock_op(sbi, &lc); 1842 f2fs_drop_extent_tree(inode); 1843 1844 ret = __exchange_data_block(inode, inode, idx, 1845 idx + delta, nr, false); 1846 f2fs_unlock_op(sbi, &lc); 1847 } 1848 filemap_invalidate_unlock(mapping); 1849 f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); 1850 if (ret) 1851 return ret; 1852 1853 /* write out all moved pages, if possible */ 1854 filemap_invalidate_lock(mapping); 1855 ret = filemap_write_and_wait_range(mapping, offset, LLONG_MAX); 1856 truncate_pagecache(inode, offset); 1857 filemap_invalidate_unlock(mapping); 1858 1859 if (!ret) 1860 f2fs_i_size_write(inode, new_size); 1861 return ret; 1862 } 1863 1864 static int f2fs_expand_inode_data(struct inode *inode, loff_t offset, 1865 loff_t len, int mode) 1866 { 1867 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 1868 struct f2fs_map_blocks map = { .m_next_pgofs = NULL, 1869 .m_next_extent = NULL, .m_seg_type = NO_CHECK_TYPE, 1870 .m_may_create = true }; 1871 struct f2fs_gc_control gc_control = { .victim_segno = NULL_SEGNO, 1872 .init_gc_type = FG_GC, 1873 .should_migrate_blocks = false, 1874 .err_gc_skipped = true, 1875 .nr_free_secs = 0 }; 1876 pgoff_t pg_start, pg_end; 1877 loff_t new_size; 1878 loff_t off_end; 1879 block_t expanded = 0; 1880 int err; 1881 1882 err = inode_newsize_ok(inode, (len + offset)); 1883 if (err) 1884 return err; 1885 1886 err = f2fs_convert_inline_inode(inode); 1887 if (err) 1888 return err; 1889 1890 f2fs_zero_post_eof_page(inode, offset + len, true); 1891 1892 f2fs_balance_fs(sbi, true); 1893 1894 pg_start = ((unsigned long long)offset) >> PAGE_SHIFT; 1895 pg_end = ((unsigned long long)offset + len) >> PAGE_SHIFT; 1896 off_end = (offset + len) & (PAGE_SIZE - 1); 1897 1898 map.m_lblk = pg_start; 1899 map.m_len = pg_end - pg_start; 1900 if (off_end) 1901 map.m_len++; 1902 1903 if (!map.m_len) 1904 return 0; 1905 1906 if (f2fs_is_pinned_file(inode)) { 1907 block_t sec_blks = CAP_BLKS_PER_SEC(sbi); 1908 block_t sec_len = roundup(map.m_len, sec_blks); 1909 1910 map.m_len = sec_blks; 1911 next_alloc: 1912 f2fs_down_write(&sbi->pin_sem); 1913 1914 if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) { 1915 if (has_not_enough_free_secs(sbi, 0, 0)) { 1916 f2fs_up_write(&sbi->pin_sem); 1917 err = -ENOSPC; 1918 f2fs_warn_ratelimited(sbi, 1919 "ino:%llu, start:%lu, end:%lu, need to trigger GC to " 1920 "reclaim enough free segment when checkpoint is enabled", 1921 inode->i_ino, pg_start, pg_end); 1922 goto out_err; 1923 } 1924 } 1925 1926 if (has_not_enough_free_secs(sbi, 0, 1927 sbi->reserved_pin_section)) { 1928 f2fs_down_write_trace(&sbi->gc_lock, &gc_control.lc); 1929 stat_inc_gc_call_count(sbi, FOREGROUND); 1930 err = f2fs_gc(sbi, &gc_control); 1931 if (err && err != -ENODATA) { 1932 f2fs_up_write(&sbi->pin_sem); 1933 goto out_err; 1934 } 1935 } 1936 1937 err = f2fs_allocate_pinning_section(sbi); 1938 if (err) { 1939 f2fs_up_write(&sbi->pin_sem); 1940 goto out_err; 1941 } 1942 1943 map.m_seg_type = CURSEG_COLD_DATA_PINNED; 1944 err = f2fs_map_blocks(inode, &map, F2FS_GET_BLOCK_PRE_DIO); 1945 file_dont_truncate(inode); 1946 1947 f2fs_up_write(&sbi->pin_sem); 1948 1949 expanded += map.m_len; 1950 sec_len -= map.m_len; 1951 map.m_lblk += map.m_len; 1952 if (!err && sec_len) 1953 goto next_alloc; 1954 1955 map.m_len = expanded; 1956 } else { 1957 err = f2fs_map_blocks(inode, &map, F2FS_GET_BLOCK_PRE_AIO); 1958 expanded = map.m_len; 1959 } 1960 out_err: 1961 if (err) { 1962 pgoff_t last_off; 1963 1964 if (!expanded) 1965 return err; 1966 1967 last_off = pg_start + expanded - 1; 1968 1969 /* update new size to the failed position */ 1970 new_size = (last_off == pg_end) ? offset + len : 1971 (loff_t)(last_off + 1) << PAGE_SHIFT; 1972 } else { 1973 new_size = ((loff_t)pg_end << PAGE_SHIFT) + off_end; 1974 } 1975 1976 if (new_size > i_size_read(inode)) { 1977 if (mode & FALLOC_FL_KEEP_SIZE) 1978 file_set_keep_isize(inode); 1979 else 1980 f2fs_i_size_write(inode, new_size); 1981 } 1982 1983 return err; 1984 } 1985 1986 static long f2fs_fallocate(struct file *file, int mode, 1987 loff_t offset, loff_t len) 1988 { 1989 struct inode *inode = file_inode(file); 1990 long ret = 0; 1991 1992 if (unlikely(f2fs_cp_error(F2FS_I_SB(inode)))) 1993 return -EIO; 1994 if (!f2fs_is_checkpoint_ready(F2FS_I_SB(inode))) 1995 return -ENOSPC; 1996 if (!f2fs_is_compress_backend_ready(inode) || IS_DEVICE_ALIASING(inode)) 1997 return -EOPNOTSUPP; 1998 1999 /* f2fs only support ->fallocate for regular file */ 2000 if (!S_ISREG(inode->i_mode)) 2001 return -EINVAL; 2002 2003 if (IS_ENCRYPTED(inode) && 2004 (mode & (FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_INSERT_RANGE))) 2005 return -EOPNOTSUPP; 2006 2007 if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE | 2008 FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_ZERO_RANGE | 2009 FALLOC_FL_INSERT_RANGE)) 2010 return -EOPNOTSUPP; 2011 2012 inode_lock(inode); 2013 2014 /* 2015 * Pinned file should not support partial truncation since the block 2016 * can be used by applications. 2017 */ 2018 if ((f2fs_compressed_file(inode) || f2fs_is_pinned_file(inode)) && 2019 (mode & (FALLOC_FL_PUNCH_HOLE | FALLOC_FL_COLLAPSE_RANGE | 2020 FALLOC_FL_ZERO_RANGE | FALLOC_FL_INSERT_RANGE))) { 2021 ret = -EOPNOTSUPP; 2022 goto out; 2023 } 2024 2025 ret = file_modified(file); 2026 if (ret) 2027 goto out; 2028 2029 /* 2030 * wait for inflight dio, blocks should be removed after IO 2031 * completion. 2032 */ 2033 inode_dio_wait(inode); 2034 2035 if (mode & FALLOC_FL_PUNCH_HOLE) { 2036 if (offset >= inode->i_size) 2037 goto out; 2038 2039 ret = f2fs_punch_hole(inode, offset, len); 2040 } else if (mode & FALLOC_FL_COLLAPSE_RANGE) { 2041 ret = f2fs_collapse_range(inode, offset, len); 2042 } else if (mode & FALLOC_FL_ZERO_RANGE) { 2043 ret = f2fs_zero_range(inode, offset, len, mode); 2044 } else if (mode & FALLOC_FL_INSERT_RANGE) { 2045 ret = f2fs_insert_range(inode, offset, len); 2046 } else { 2047 ret = f2fs_expand_inode_data(inode, offset, len, mode); 2048 } 2049 2050 if (!ret) { 2051 inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode)); 2052 f2fs_mark_inode_dirty_sync(inode, false); 2053 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); 2054 } 2055 2056 out: 2057 inode_unlock(inode); 2058 2059 trace_f2fs_fallocate(inode, mode, offset, len, ret); 2060 return ret; 2061 } 2062 2063 static int f2fs_release_file(struct inode *inode, struct file *filp) 2064 { 2065 if (atomic_dec_and_test(&F2FS_I(inode)->open_count)) 2066 f2fs_remove_donate_inode(inode); 2067 2068 /* 2069 * f2fs_release_file is called at every close calls. So we should 2070 * not drop any inmemory pages by close called by other process. 2071 */ 2072 if (!(filp->f_mode & FMODE_WRITE) || 2073 atomic_read(&inode->i_writecount) != 1) 2074 return 0; 2075 2076 inode_lock(inode); 2077 f2fs_abort_atomic_write(inode, true); 2078 inode_unlock(inode); 2079 2080 return 0; 2081 } 2082 2083 static int f2fs_file_flush(struct file *file, fl_owner_t id) 2084 { 2085 struct inode *inode = file_inode(file); 2086 2087 /* 2088 * If the process doing a transaction is crashed, we should do 2089 * roll-back. Otherwise, other reader/write can see corrupted database 2090 * until all the writers close its file. Since this should be done 2091 * before dropping file lock, it needs to do in ->flush. 2092 */ 2093 if (F2FS_I(inode)->atomic_write_task == current && 2094 (current->flags & PF_EXITING)) { 2095 inode_lock(inode); 2096 f2fs_abort_atomic_write(inode, true); 2097 inode_unlock(inode); 2098 } 2099 2100 return 0; 2101 } 2102 2103 static int f2fs_setflags_common(struct inode *inode, u32 iflags, u32 mask) 2104 { 2105 struct f2fs_inode_info *fi = F2FS_I(inode); 2106 u32 masked_flags = fi->i_flags & mask; 2107 2108 /* mask can be shrunk by flags_valid selector */ 2109 iflags &= mask; 2110 2111 /* Is it quota file? Do not allow user to mess with it */ 2112 if (IS_NOQUOTA(inode)) 2113 return -EPERM; 2114 2115 if ((iflags ^ masked_flags) & F2FS_CASEFOLD_FL) { 2116 if (!f2fs_sb_has_casefold(F2FS_I_SB(inode))) 2117 return -EOPNOTSUPP; 2118 if (!f2fs_empty_dir(inode)) 2119 return -ENOTEMPTY; 2120 } 2121 2122 if (iflags & (F2FS_COMPR_FL | F2FS_NOCOMP_FL)) { 2123 if (!f2fs_sb_has_compression(F2FS_I_SB(inode))) 2124 return -EOPNOTSUPP; 2125 if ((iflags & F2FS_COMPR_FL) && (iflags & F2FS_NOCOMP_FL)) 2126 return -EINVAL; 2127 } 2128 2129 if ((iflags ^ masked_flags) & F2FS_COMPR_FL) { 2130 if (masked_flags & F2FS_COMPR_FL) { 2131 if (!f2fs_disable_compressed_file(inode)) 2132 return -EINVAL; 2133 } else { 2134 /* try to convert inline_data to support compression */ 2135 int err = f2fs_convert_inline_inode(inode); 2136 if (err) 2137 return err; 2138 2139 f2fs_down_write(&fi->i_sem); 2140 if (!f2fs_may_compress(inode) || 2141 atomic_read(&fi->writeback) || 2142 (S_ISREG(inode->i_mode) && 2143 F2FS_HAS_BLOCKS(inode))) { 2144 f2fs_up_write(&fi->i_sem); 2145 return -EINVAL; 2146 } 2147 err = set_compress_context(inode); 2148 f2fs_up_write(&fi->i_sem); 2149 2150 if (err) 2151 return err; 2152 } 2153 } 2154 2155 fi->i_flags = iflags | (fi->i_flags & ~mask); 2156 f2fs_bug_on(F2FS_I_SB(inode), (fi->i_flags & F2FS_COMPR_FL) && 2157 (fi->i_flags & F2FS_NOCOMP_FL)); 2158 2159 if (fi->i_flags & F2FS_PROJINHERIT_FL) 2160 set_inode_flag(inode, FI_PROJ_INHERIT); 2161 else 2162 clear_inode_flag(inode, FI_PROJ_INHERIT); 2163 2164 inode_set_ctime_current(inode); 2165 f2fs_set_inode_flags(inode); 2166 f2fs_mark_inode_dirty_sync(inode, true); 2167 return 0; 2168 } 2169 2170 /* FS_IOC_[GS]ETFLAGS and FS_IOC_FS[GS]ETXATTR support */ 2171 2172 /* 2173 * To make a new on-disk f2fs i_flag gettable via FS_IOC_GETFLAGS, add an entry 2174 * for it to f2fs_fsflags_map[], and add its FS_*_FL equivalent to 2175 * F2FS_GETTABLE_FS_FL. To also make it settable via FS_IOC_SETFLAGS, also add 2176 * its FS_*_FL equivalent to F2FS_SETTABLE_FS_FL. 2177 * 2178 * Translating flags to fsx_flags value used by FS_IOC_FSGETXATTR and 2179 * FS_IOC_FSSETXATTR is done by the VFS. 2180 */ 2181 2182 static const struct { 2183 u32 iflag; 2184 u32 fsflag; 2185 } f2fs_fsflags_map[] = { 2186 { F2FS_COMPR_FL, FS_COMPR_FL }, 2187 { F2FS_SYNC_FL, FS_SYNC_FL }, 2188 { F2FS_IMMUTABLE_FL, FS_IMMUTABLE_FL }, 2189 { F2FS_APPEND_FL, FS_APPEND_FL }, 2190 { F2FS_NODUMP_FL, FS_NODUMP_FL }, 2191 { F2FS_NOATIME_FL, FS_NOATIME_FL }, 2192 { F2FS_NOCOMP_FL, FS_NOCOMP_FL }, 2193 { F2FS_INDEX_FL, FS_INDEX_FL }, 2194 { F2FS_DIRSYNC_FL, FS_DIRSYNC_FL }, 2195 { F2FS_PROJINHERIT_FL, FS_PROJINHERIT_FL }, 2196 { F2FS_CASEFOLD_FL, FS_CASEFOLD_FL }, 2197 }; 2198 2199 #define F2FS_GETTABLE_FS_FL ( \ 2200 FS_COMPR_FL | \ 2201 FS_SYNC_FL | \ 2202 FS_IMMUTABLE_FL | \ 2203 FS_APPEND_FL | \ 2204 FS_NODUMP_FL | \ 2205 FS_NOATIME_FL | \ 2206 FS_NOCOMP_FL | \ 2207 FS_INDEX_FL | \ 2208 FS_DIRSYNC_FL | \ 2209 FS_PROJINHERIT_FL | \ 2210 FS_ENCRYPT_FL | \ 2211 FS_INLINE_DATA_FL | \ 2212 FS_NOCOW_FL | \ 2213 FS_VERITY_FL | \ 2214 FS_CASEFOLD_FL) 2215 2216 #define F2FS_SETTABLE_FS_FL ( \ 2217 FS_COMPR_FL | \ 2218 FS_SYNC_FL | \ 2219 FS_IMMUTABLE_FL | \ 2220 FS_APPEND_FL | \ 2221 FS_NODUMP_FL | \ 2222 FS_NOATIME_FL | \ 2223 FS_NOCOMP_FL | \ 2224 FS_DIRSYNC_FL | \ 2225 FS_PROJINHERIT_FL | \ 2226 FS_CASEFOLD_FL) 2227 2228 /* Convert f2fs on-disk i_flags to FS_IOC_{GET,SET}FLAGS flags */ 2229 static inline u32 f2fs_iflags_to_fsflags(u32 iflags) 2230 { 2231 u32 fsflags = 0; 2232 int i; 2233 2234 for (i = 0; i < ARRAY_SIZE(f2fs_fsflags_map); i++) 2235 if (iflags & f2fs_fsflags_map[i].iflag) 2236 fsflags |= f2fs_fsflags_map[i].fsflag; 2237 2238 return fsflags; 2239 } 2240 2241 /* Convert FS_IOC_{GET,SET}FLAGS flags to f2fs on-disk i_flags */ 2242 static inline u32 f2fs_fsflags_to_iflags(u32 fsflags) 2243 { 2244 u32 iflags = 0; 2245 int i; 2246 2247 for (i = 0; i < ARRAY_SIZE(f2fs_fsflags_map); i++) 2248 if (fsflags & f2fs_fsflags_map[i].fsflag) 2249 iflags |= f2fs_fsflags_map[i].iflag; 2250 2251 return iflags; 2252 } 2253 2254 static int f2fs_ioc_getversion(struct file *filp, unsigned long arg) 2255 { 2256 struct inode *inode = file_inode(filp); 2257 2258 return put_user(inode->i_generation, (int __user *)arg); 2259 } 2260 2261 static int f2fs_ioc_start_atomic_write(struct file *filp, bool truncate) 2262 { 2263 struct inode *inode = file_inode(filp); 2264 struct mnt_idmap *idmap = file_mnt_idmap(filp); 2265 struct f2fs_inode_info *fi = F2FS_I(inode); 2266 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 2267 loff_t isize; 2268 int ret; 2269 2270 if (!(filp->f_mode & FMODE_WRITE)) 2271 return -EBADF; 2272 2273 if (!inode_owner_or_capable(idmap, inode)) 2274 return -EACCES; 2275 2276 if (!S_ISREG(inode->i_mode)) 2277 return -EINVAL; 2278 2279 if (filp->f_flags & O_DIRECT) 2280 return -EINVAL; 2281 2282 ret = mnt_want_write_file(filp); 2283 if (ret) 2284 return ret; 2285 2286 inode_lock(inode); 2287 2288 if (!f2fs_disable_compressed_file(inode) || 2289 f2fs_is_pinned_file(inode)) { 2290 ret = -EINVAL; 2291 goto out; 2292 } 2293 2294 if (f2fs_is_atomic_file(inode)) 2295 goto out; 2296 2297 ret = f2fs_convert_inline_inode(inode); 2298 if (ret) 2299 goto out; 2300 2301 f2fs_down_write(&fi->i_gc_rwsem[WRITE]); 2302 f2fs_down_write(&fi->i_gc_rwsem[READ]); 2303 2304 /* 2305 * Should wait end_io to count F2FS_WB_CP_DATA correctly by 2306 * f2fs_is_atomic_file. 2307 */ 2308 if (get_dirty_pages(inode)) 2309 f2fs_warn(sbi, "Unexpected flush for atomic writes: ino=%llu, npages=%u", 2310 inode->i_ino, get_dirty_pages(inode)); 2311 ret = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX); 2312 if (ret) 2313 goto out_unlock; 2314 2315 /* Check if the inode already has a COW inode */ 2316 if (fi->cow_inode == NULL) { 2317 /* Create a COW inode for atomic write */ 2318 struct dentry *dentry = file_dentry(filp); 2319 struct inode *dir = d_inode(dentry->d_parent); 2320 2321 ret = f2fs_get_tmpfile(idmap, dir, &fi->cow_inode); 2322 if (ret) 2323 goto out_unlock; 2324 2325 set_inode_flag(fi->cow_inode, FI_COW_FILE); 2326 clear_inode_flag(fi->cow_inode, FI_INLINE_DATA); 2327 2328 /* Set the COW inode's atomic_inode to the atomic inode */ 2329 F2FS_I(fi->cow_inode)->atomic_inode = inode; 2330 } else { 2331 /* Reuse the already created COW inode */ 2332 f2fs_bug_on(sbi, get_dirty_pages(fi->cow_inode)); 2333 2334 invalidate_mapping_pages(fi->cow_inode->i_mapping, 0, -1); 2335 2336 ret = f2fs_do_truncate_blocks(fi->cow_inode, 0, true); 2337 if (ret) 2338 goto out_unlock; 2339 } 2340 2341 f2fs_write_inode(inode, NULL); 2342 2343 stat_inc_atomic_inode(inode); 2344 2345 set_inode_flag(inode, FI_ATOMIC_FILE); 2346 2347 isize = i_size_read(inode); 2348 fi->original_i_size = isize; 2349 if (truncate) { 2350 set_inode_flag(inode, FI_ATOMIC_REPLACE); 2351 truncate_inode_pages_final(inode->i_mapping); 2352 f2fs_i_size_write(inode, 0); 2353 isize = 0; 2354 } 2355 f2fs_i_size_write(fi->cow_inode, isize); 2356 2357 out_unlock: 2358 f2fs_up_write(&fi->i_gc_rwsem[READ]); 2359 f2fs_up_write(&fi->i_gc_rwsem[WRITE]); 2360 if (ret) 2361 goto out; 2362 2363 f2fs_update_time(sbi, REQ_TIME); 2364 fi->atomic_write_task = current; 2365 stat_update_max_atomic_write(inode); 2366 fi->atomic_write_cnt = 0; 2367 out: 2368 inode_unlock(inode); 2369 mnt_drop_write_file(filp); 2370 return ret; 2371 } 2372 2373 static int f2fs_ioc_commit_atomic_write(struct file *filp) 2374 { 2375 struct inode *inode = file_inode(filp); 2376 struct mnt_idmap *idmap = file_mnt_idmap(filp); 2377 int ret; 2378 2379 if (!(filp->f_mode & FMODE_WRITE)) 2380 return -EBADF; 2381 2382 if (!inode_owner_or_capable(idmap, inode)) 2383 return -EACCES; 2384 2385 ret = mnt_want_write_file(filp); 2386 if (ret) 2387 return ret; 2388 2389 f2fs_balance_fs(F2FS_I_SB(inode), true); 2390 2391 inode_lock(inode); 2392 2393 if (f2fs_is_atomic_file(inode)) { 2394 ret = f2fs_commit_atomic_write(inode); 2395 if (!ret) 2396 ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 0, true); 2397 2398 f2fs_abort_atomic_write(inode, ret); 2399 } else { 2400 ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 1, false); 2401 } 2402 2403 inode_unlock(inode); 2404 mnt_drop_write_file(filp); 2405 return ret; 2406 } 2407 2408 static int f2fs_ioc_abort_atomic_write(struct file *filp) 2409 { 2410 struct inode *inode = file_inode(filp); 2411 struct mnt_idmap *idmap = file_mnt_idmap(filp); 2412 int ret; 2413 2414 if (!(filp->f_mode & FMODE_WRITE)) 2415 return -EBADF; 2416 2417 if (!inode_owner_or_capable(idmap, inode)) 2418 return -EACCES; 2419 2420 ret = mnt_want_write_file(filp); 2421 if (ret) 2422 return ret; 2423 2424 inode_lock(inode); 2425 2426 f2fs_abort_atomic_write(inode, true); 2427 2428 inode_unlock(inode); 2429 2430 mnt_drop_write_file(filp); 2431 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); 2432 return ret; 2433 } 2434 2435 int f2fs_do_shutdown(struct f2fs_sb_info *sbi, unsigned int flag, 2436 bool readonly, bool need_lock) 2437 { 2438 struct super_block *sb = sbi->sb; 2439 int ret = 0; 2440 2441 switch (flag) { 2442 case F2FS_GOING_DOWN_FULLSYNC: 2443 ret = bdev_freeze(sb->s_bdev); 2444 if (ret) 2445 goto out; 2446 f2fs_stop_checkpoint(sbi, false, STOP_CP_REASON_SHUTDOWN); 2447 bdev_thaw(sb->s_bdev); 2448 break; 2449 case F2FS_GOING_DOWN_METASYNC: 2450 /* do checkpoint only */ 2451 ret = f2fs_sync_fs(sb, 1); 2452 if (ret) { 2453 if (ret == -EIO) 2454 ret = 0; 2455 goto out; 2456 } 2457 f2fs_stop_checkpoint(sbi, false, STOP_CP_REASON_SHUTDOWN); 2458 break; 2459 case F2FS_GOING_DOWN_NOSYNC: 2460 f2fs_stop_checkpoint(sbi, false, STOP_CP_REASON_SHUTDOWN); 2461 break; 2462 case F2FS_GOING_DOWN_METAFLUSH: 2463 f2fs_sync_meta_pages(sbi, LONG_MAX, FS_META_IO); 2464 f2fs_stop_checkpoint(sbi, false, STOP_CP_REASON_SHUTDOWN); 2465 break; 2466 case F2FS_GOING_DOWN_NEED_FSCK: 2467 set_sbi_flag(sbi, SBI_NEED_FSCK); 2468 set_sbi_flag(sbi, SBI_CP_DISABLED_QUICK); 2469 set_sbi_flag(sbi, SBI_IS_DIRTY); 2470 /* do checkpoint only */ 2471 ret = f2fs_sync_fs(sb, 1); 2472 if (ret == -EIO) 2473 ret = 0; 2474 goto out; 2475 default: 2476 ret = -EINVAL; 2477 goto out; 2478 } 2479 2480 if (readonly) 2481 goto out; 2482 2483 /* 2484 * grab sb->s_umount to avoid racing w/ remount() and other shutdown 2485 * paths. 2486 */ 2487 if (need_lock) 2488 down_write(&sbi->sb->s_umount); 2489 2490 f2fs_stop_gc_thread(sbi); 2491 f2fs_stop_discard_thread(sbi); 2492 2493 f2fs_drop_discard_cmd(sbi); 2494 clear_opt(sbi, DISCARD); 2495 2496 if (need_lock) 2497 up_write(&sbi->sb->s_umount); 2498 2499 f2fs_update_time(sbi, REQ_TIME); 2500 out: 2501 2502 trace_f2fs_shutdown(sbi, flag, ret); 2503 2504 return ret; 2505 } 2506 2507 static int f2fs_ioc_shutdown(struct file *filp, unsigned long arg) 2508 { 2509 struct inode *inode = file_inode(filp); 2510 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 2511 __u32 in; 2512 int ret; 2513 bool need_drop = false, readonly = false; 2514 2515 if (!capable(CAP_SYS_ADMIN)) 2516 return -EPERM; 2517 2518 if (get_user(in, (__u32 __user *)arg)) 2519 return -EFAULT; 2520 2521 if (in != F2FS_GOING_DOWN_FULLSYNC) { 2522 ret = mnt_want_write_file(filp); 2523 if (ret) { 2524 if (ret != -EROFS) 2525 return ret; 2526 2527 /* fallback to nosync shutdown for readonly fs */ 2528 in = F2FS_GOING_DOWN_NOSYNC; 2529 readonly = true; 2530 } else { 2531 need_drop = true; 2532 } 2533 } 2534 2535 ret = f2fs_do_shutdown(sbi, in, readonly, true); 2536 2537 if (need_drop) 2538 mnt_drop_write_file(filp); 2539 2540 return ret; 2541 } 2542 2543 static int f2fs_keep_noreuse_range(struct inode *inode, 2544 loff_t offset, loff_t len) 2545 { 2546 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 2547 u64 max_bytes = F2FS_BLK_TO_BYTES(max_file_blocks(inode)); 2548 u64 start, end; 2549 int ret = 0; 2550 2551 if (!S_ISREG(inode->i_mode)) 2552 return 0; 2553 2554 if (offset >= max_bytes || len > max_bytes || 2555 (offset + len) > max_bytes) 2556 return 0; 2557 2558 start = offset >> PAGE_SHIFT; 2559 end = DIV_ROUND_UP(offset + len, PAGE_SIZE); 2560 2561 inode_lock(inode); 2562 if (f2fs_is_atomic_file(inode)) { 2563 inode_unlock(inode); 2564 return 0; 2565 } 2566 2567 spin_lock(&sbi->inode_lock[DONATE_INODE]); 2568 /* let's remove the range, if len = 0 */ 2569 if (!len) { 2570 if (!list_empty(&F2FS_I(inode)->gdonate_list)) { 2571 list_del_init(&F2FS_I(inode)->gdonate_list); 2572 sbi->donate_files--; 2573 if (is_inode_flag_set(inode, FI_DONATE_FINISHED)) 2574 ret = -EALREADY; 2575 else 2576 set_inode_flag(inode, FI_DONATE_FINISHED); 2577 } else 2578 ret = -ENOENT; 2579 } else { 2580 if (list_empty(&F2FS_I(inode)->gdonate_list)) { 2581 list_add_tail(&F2FS_I(inode)->gdonate_list, 2582 &sbi->inode_list[DONATE_INODE]); 2583 sbi->donate_files++; 2584 } else { 2585 list_move_tail(&F2FS_I(inode)->gdonate_list, 2586 &sbi->inode_list[DONATE_INODE]); 2587 } 2588 F2FS_I(inode)->donate_start = start; 2589 F2FS_I(inode)->donate_end = end - 1; 2590 clear_inode_flag(inode, FI_DONATE_FINISHED); 2591 } 2592 spin_unlock(&sbi->inode_lock[DONATE_INODE]); 2593 inode_unlock(inode); 2594 2595 return ret; 2596 } 2597 2598 static int f2fs_ioc_fitrim(struct file *filp, unsigned long arg) 2599 { 2600 struct inode *inode = file_inode(filp); 2601 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 2602 struct fstrim_range range; 2603 int ret; 2604 2605 if (!capable(CAP_SYS_ADMIN)) 2606 return -EPERM; 2607 2608 if (!f2fs_hw_support_discard(sbi)) 2609 return -EOPNOTSUPP; 2610 2611 if (copy_from_user(&range, (struct fstrim_range __user *)arg, 2612 sizeof(range))) 2613 return -EFAULT; 2614 2615 ret = mnt_want_write_file(filp); 2616 if (ret) 2617 return ret; 2618 2619 range.minlen = max_t(unsigned int, range.minlen, 2620 f2fs_hw_discard_granularity(sbi)); 2621 ret = f2fs_trim_fs(sbi, &range); 2622 mnt_drop_write_file(filp); 2623 if (ret < 0) 2624 return ret; 2625 2626 if (copy_to_user((struct fstrim_range __user *)arg, &range, 2627 sizeof(range))) 2628 return -EFAULT; 2629 f2fs_update_time(sbi, REQ_TIME); 2630 return 0; 2631 } 2632 2633 static bool uuid_is_nonzero(__u8 u[16]) 2634 { 2635 int i; 2636 2637 for (i = 0; i < 16; i++) 2638 if (u[i]) 2639 return true; 2640 return false; 2641 } 2642 2643 static int f2fs_ioc_set_encryption_policy(struct file *filp, unsigned long arg) 2644 { 2645 struct inode *inode = file_inode(filp); 2646 int ret; 2647 2648 if (!f2fs_sb_has_encrypt(F2FS_I_SB(inode))) 2649 return -EOPNOTSUPP; 2650 2651 ret = fscrypt_ioctl_set_policy(filp, (const void __user *)arg); 2652 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); 2653 return ret; 2654 } 2655 2656 static int f2fs_ioc_get_encryption_policy(struct file *filp, unsigned long arg) 2657 { 2658 if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp)))) 2659 return -EOPNOTSUPP; 2660 return fscrypt_ioctl_get_policy(filp, (void __user *)arg); 2661 } 2662 2663 static int f2fs_ioc_get_encryption_pwsalt(struct file *filp, unsigned long arg) 2664 { 2665 struct inode *inode = file_inode(filp); 2666 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 2667 u8 encrypt_pw_salt[16]; 2668 int err; 2669 2670 if (!f2fs_sb_has_encrypt(sbi)) 2671 return -EOPNOTSUPP; 2672 2673 err = mnt_want_write_file(filp); 2674 if (err) 2675 return err; 2676 2677 f2fs_down_write(&sbi->sb_lock); 2678 2679 if (uuid_is_nonzero(sbi->raw_super->encrypt_pw_salt)) 2680 goto got_it; 2681 2682 /* update superblock with uuid */ 2683 generate_random_uuid(sbi->raw_super->encrypt_pw_salt); 2684 2685 err = f2fs_commit_super(sbi, false); 2686 if (err) { 2687 /* undo new data */ 2688 memset(sbi->raw_super->encrypt_pw_salt, 0, 16); 2689 goto out_err; 2690 } 2691 got_it: 2692 memcpy(encrypt_pw_salt, sbi->raw_super->encrypt_pw_salt, 16); 2693 out_err: 2694 f2fs_up_write(&sbi->sb_lock); 2695 mnt_drop_write_file(filp); 2696 2697 if (!err && copy_to_user((__u8 __user *)arg, encrypt_pw_salt, 16)) 2698 err = -EFAULT; 2699 2700 return err; 2701 } 2702 2703 static int f2fs_ioc_get_encryption_policy_ex(struct file *filp, 2704 unsigned long arg) 2705 { 2706 if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp)))) 2707 return -EOPNOTSUPP; 2708 2709 return fscrypt_ioctl_get_policy_ex(filp, (void __user *)arg); 2710 } 2711 2712 static int f2fs_ioc_add_encryption_key(struct file *filp, unsigned long arg) 2713 { 2714 if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp)))) 2715 return -EOPNOTSUPP; 2716 2717 return fscrypt_ioctl_add_key(filp, (void __user *)arg); 2718 } 2719 2720 static int f2fs_ioc_remove_encryption_key(struct file *filp, unsigned long arg) 2721 { 2722 if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp)))) 2723 return -EOPNOTSUPP; 2724 2725 return fscrypt_ioctl_remove_key(filp, (void __user *)arg); 2726 } 2727 2728 static int f2fs_ioc_remove_encryption_key_all_users(struct file *filp, 2729 unsigned long arg) 2730 { 2731 if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp)))) 2732 return -EOPNOTSUPP; 2733 2734 return fscrypt_ioctl_remove_key_all_users(filp, (void __user *)arg); 2735 } 2736 2737 static int f2fs_ioc_get_encryption_key_status(struct file *filp, 2738 unsigned long arg) 2739 { 2740 if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp)))) 2741 return -EOPNOTSUPP; 2742 2743 return fscrypt_ioctl_get_key_status(filp, (void __user *)arg); 2744 } 2745 2746 static int f2fs_ioc_get_encryption_nonce(struct file *filp, unsigned long arg) 2747 { 2748 if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp)))) 2749 return -EOPNOTSUPP; 2750 2751 return fscrypt_ioctl_get_nonce(filp, (void __user *)arg); 2752 } 2753 2754 static int f2fs_ioc_gc(struct file *filp, unsigned long arg) 2755 { 2756 struct inode *inode = file_inode(filp); 2757 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 2758 struct f2fs_gc_control gc_control = { .victim_segno = NULL_SEGNO, 2759 .no_bg_gc = false, 2760 .should_migrate_blocks = false, 2761 .nr_free_secs = 0 }; 2762 __u32 sync; 2763 int ret; 2764 2765 if (!capable(CAP_SYS_ADMIN)) 2766 return -EPERM; 2767 2768 if (get_user(sync, (__u32 __user *)arg)) 2769 return -EFAULT; 2770 2771 if (f2fs_readonly(sbi->sb)) 2772 return -EROFS; 2773 2774 ret = mnt_want_write_file(filp); 2775 if (ret) 2776 return ret; 2777 2778 if (!sync) { 2779 if (!f2fs_down_write_trylock_trace(&sbi->gc_lock, 2780 &gc_control.lc)) { 2781 ret = -EBUSY; 2782 goto out; 2783 } 2784 } else { 2785 f2fs_down_write_trace(&sbi->gc_lock, &gc_control.lc); 2786 } 2787 2788 gc_control.init_gc_type = sync ? FG_GC : BG_GC; 2789 gc_control.err_gc_skipped = sync; 2790 stat_inc_gc_call_count(sbi, FOREGROUND); 2791 ret = f2fs_gc(sbi, &gc_control); 2792 out: 2793 mnt_drop_write_file(filp); 2794 return ret; 2795 } 2796 2797 static int __f2fs_ioc_gc_range(struct file *filp, struct f2fs_gc_range *range) 2798 { 2799 struct f2fs_sb_info *sbi = F2FS_I_SB(file_inode(filp)); 2800 struct f2fs_gc_control gc_control = { 2801 .init_gc_type = range->sync ? FG_GC : BG_GC, 2802 .no_bg_gc = false, 2803 .should_migrate_blocks = false, 2804 .err_gc_skipped = range->sync, 2805 .nr_free_secs = 0 }; 2806 u64 end; 2807 int ret; 2808 2809 if (!capable(CAP_SYS_ADMIN)) 2810 return -EPERM; 2811 if (f2fs_readonly(sbi->sb)) 2812 return -EROFS; 2813 2814 end = range->start + range->len; 2815 if (end < range->start || range->start < MAIN_BLKADDR(sbi) || 2816 end >= MAX_BLKADDR(sbi)) 2817 return -EINVAL; 2818 2819 ret = mnt_want_write_file(filp); 2820 if (ret) 2821 return ret; 2822 2823 do_more: 2824 if (!range->sync) { 2825 if (!f2fs_down_write_trylock_trace(&sbi->gc_lock, &gc_control.lc)) { 2826 ret = -EBUSY; 2827 goto out; 2828 } 2829 } else { 2830 f2fs_down_write_trace(&sbi->gc_lock, &gc_control.lc); 2831 } 2832 2833 gc_control.victim_segno = GET_SEGNO(sbi, range->start); 2834 stat_inc_gc_call_count(sbi, FOREGROUND); 2835 ret = f2fs_gc(sbi, &gc_control); 2836 if (ret) { 2837 if (ret == -EBUSY) 2838 ret = -EAGAIN; 2839 goto out; 2840 } 2841 range->start += CAP_BLKS_PER_SEC(sbi); 2842 if (range->start <= end) 2843 goto do_more; 2844 out: 2845 mnt_drop_write_file(filp); 2846 return ret; 2847 } 2848 2849 static int f2fs_ioc_gc_range(struct file *filp, unsigned long arg) 2850 { 2851 struct f2fs_gc_range range; 2852 2853 if (copy_from_user(&range, (struct f2fs_gc_range __user *)arg, 2854 sizeof(range))) 2855 return -EFAULT; 2856 return __f2fs_ioc_gc_range(filp, &range); 2857 } 2858 2859 static int f2fs_ioc_write_checkpoint(struct file *filp) 2860 { 2861 struct inode *inode = file_inode(filp); 2862 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 2863 int ret; 2864 2865 if (!capable(CAP_SYS_ADMIN)) 2866 return -EPERM; 2867 2868 if (f2fs_readonly(sbi->sb)) 2869 return -EROFS; 2870 2871 if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) { 2872 f2fs_info(sbi, "Skipping Checkpoint. Checkpoints currently disabled."); 2873 return -EINVAL; 2874 } 2875 2876 ret = mnt_want_write_file(filp); 2877 if (ret) 2878 return ret; 2879 2880 ret = f2fs_sync_fs(sbi->sb, 1); 2881 2882 mnt_drop_write_file(filp); 2883 return ret; 2884 } 2885 2886 static int f2fs_defragment_range(struct f2fs_sb_info *sbi, 2887 struct file *filp, 2888 struct f2fs_defragment *range) 2889 { 2890 struct inode *inode = file_inode(filp); 2891 struct f2fs_map_blocks map = { .m_next_extent = NULL, 2892 .m_seg_type = NO_CHECK_TYPE, 2893 .m_may_create = false }; 2894 struct extent_info ei = {}; 2895 pgoff_t pg_start, pg_end, next_pgofs; 2896 unsigned int total = 0, sec_num; 2897 block_t blk_end = 0; 2898 bool fragmented = false; 2899 int err; 2900 2901 f2fs_balance_fs(sbi, true); 2902 2903 inode_lock(inode); 2904 pg_start = range->start >> PAGE_SHIFT; 2905 pg_end = min_t(pgoff_t, 2906 (range->start + range->len) >> PAGE_SHIFT, 2907 DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE)); 2908 2909 if (is_inode_flag_set(inode, FI_COMPRESS_RELEASED) || 2910 f2fs_is_atomic_file(inode)) { 2911 err = -EINVAL; 2912 goto unlock_out; 2913 } 2914 2915 /* if in-place-update policy is enabled, don't waste time here */ 2916 set_inode_flag(inode, FI_OPU_WRITE); 2917 if (f2fs_should_update_inplace(inode, NULL)) { 2918 err = -EINVAL; 2919 goto out; 2920 } 2921 2922 /* writeback all dirty pages in the range */ 2923 err = filemap_write_and_wait_range(inode->i_mapping, 2924 pg_start << PAGE_SHIFT, 2925 (pg_end << PAGE_SHIFT) - 1); 2926 if (err) 2927 goto out; 2928 2929 /* 2930 * lookup mapping info in extent cache, skip defragmenting if physical 2931 * block addresses are continuous. 2932 */ 2933 if (f2fs_lookup_read_extent_cache(inode, pg_start, &ei)) { 2934 if ((pgoff_t)ei.fofs + ei.len >= pg_end) 2935 goto out; 2936 } 2937 2938 map.m_lblk = pg_start; 2939 map.m_next_pgofs = &next_pgofs; 2940 2941 /* 2942 * lookup mapping info in dnode page cache, skip defragmenting if all 2943 * physical block addresses are continuous even if there are hole(s) 2944 * in logical blocks. 2945 */ 2946 while (map.m_lblk < pg_end) { 2947 map.m_len = pg_end - map.m_lblk; 2948 err = f2fs_map_blocks(inode, &map, F2FS_GET_BLOCK_DEFAULT); 2949 if (err) 2950 goto out; 2951 2952 if (!(map.m_flags & F2FS_MAP_FLAGS)) { 2953 map.m_lblk = next_pgofs; 2954 continue; 2955 } 2956 2957 if (blk_end && blk_end != map.m_pblk) 2958 fragmented = true; 2959 2960 /* record total count of block that we're going to move */ 2961 total += map.m_len; 2962 2963 blk_end = map.m_pblk + map.m_len; 2964 2965 map.m_lblk += map.m_len; 2966 } 2967 2968 if (!fragmented) { 2969 total = 0; 2970 goto out; 2971 } 2972 2973 sec_num = DIV_ROUND_UP(total, CAP_BLKS_PER_SEC(sbi)); 2974 2975 /* 2976 * make sure there are enough free section for LFS allocation, this can 2977 * avoid defragment running in SSR mode when free section are allocated 2978 * intensively 2979 */ 2980 if (has_not_enough_free_secs(sbi, 0, sec_num)) { 2981 err = -EAGAIN; 2982 goto out; 2983 } 2984 2985 map.m_lblk = pg_start; 2986 map.m_len = pg_end - pg_start; 2987 total = 0; 2988 2989 while (map.m_lblk < pg_end) { 2990 pgoff_t idx; 2991 int cnt = 0; 2992 2993 do_map: 2994 map.m_len = pg_end - map.m_lblk; 2995 err = f2fs_map_blocks(inode, &map, F2FS_GET_BLOCK_DEFAULT); 2996 if (err) 2997 goto clear_out; 2998 2999 if (!(map.m_flags & F2FS_MAP_FLAGS)) { 3000 map.m_lblk = next_pgofs; 3001 goto check; 3002 } 3003 3004 set_inode_flag(inode, FI_SKIP_WRITES); 3005 3006 idx = map.m_lblk; 3007 while (idx < map.m_lblk + map.m_len && 3008 cnt < BLKS_PER_SEG(sbi)) { 3009 struct folio *folio; 3010 3011 folio = f2fs_get_lock_data_folio(inode, idx, true); 3012 if (IS_ERR(folio)) { 3013 err = PTR_ERR(folio); 3014 goto clear_out; 3015 } 3016 3017 f2fs_folio_wait_writeback(folio, DATA, true, true); 3018 3019 folio_mark_dirty(folio); 3020 folio_set_f2fs_gcing(folio); 3021 f2fs_folio_put(folio, true); 3022 3023 idx++; 3024 cnt++; 3025 total++; 3026 } 3027 3028 map.m_lblk = idx; 3029 check: 3030 if (map.m_lblk < pg_end && cnt < BLKS_PER_SEG(sbi)) 3031 goto do_map; 3032 3033 clear_inode_flag(inode, FI_SKIP_WRITES); 3034 3035 err = filemap_fdatawrite(inode->i_mapping); 3036 if (err) 3037 goto out; 3038 } 3039 clear_out: 3040 clear_inode_flag(inode, FI_SKIP_WRITES); 3041 out: 3042 clear_inode_flag(inode, FI_OPU_WRITE); 3043 unlock_out: 3044 inode_unlock(inode); 3045 if (!err) 3046 range->len = (u64)total << PAGE_SHIFT; 3047 return err; 3048 } 3049 3050 static int f2fs_ioc_defragment(struct file *filp, unsigned long arg) 3051 { 3052 struct inode *inode = file_inode(filp); 3053 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 3054 struct f2fs_defragment range; 3055 int err; 3056 3057 if (!capable(CAP_SYS_ADMIN)) 3058 return -EPERM; 3059 3060 if (!S_ISREG(inode->i_mode)) 3061 return -EINVAL; 3062 3063 if (f2fs_readonly(sbi->sb)) 3064 return -EROFS; 3065 3066 if (copy_from_user(&range, (struct f2fs_defragment __user *)arg, 3067 sizeof(range))) 3068 return -EFAULT; 3069 3070 /* verify alignment of offset & size */ 3071 if (range.start & (F2FS_BLKSIZE - 1) || range.len & (F2FS_BLKSIZE - 1)) 3072 return -EINVAL; 3073 3074 if (unlikely((range.start + range.len) >> PAGE_SHIFT > 3075 max_file_blocks(inode))) 3076 return -EINVAL; 3077 3078 err = mnt_want_write_file(filp); 3079 if (err) 3080 return err; 3081 3082 err = f2fs_defragment_range(sbi, filp, &range); 3083 mnt_drop_write_file(filp); 3084 3085 if (range.len) 3086 f2fs_update_time(sbi, REQ_TIME); 3087 if (err < 0) 3088 return err; 3089 3090 if (copy_to_user((struct f2fs_defragment __user *)arg, &range, 3091 sizeof(range))) 3092 return -EFAULT; 3093 3094 return 0; 3095 } 3096 3097 static int f2fs_move_file_range(struct file *file_in, loff_t pos_in, 3098 struct file *file_out, loff_t pos_out, size_t len) 3099 { 3100 struct inode *src = file_inode(file_in); 3101 struct inode *dst = file_inode(file_out); 3102 struct f2fs_sb_info *sbi = F2FS_I_SB(src); 3103 struct f2fs_lock_context lc; 3104 size_t olen = len, dst_max_i_size = 0; 3105 size_t dst_osize; 3106 int ret; 3107 3108 if (file_in->f_path.mnt != file_out->f_path.mnt || 3109 src->i_sb != dst->i_sb) 3110 return -EXDEV; 3111 3112 if (unlikely(f2fs_readonly(src->i_sb))) 3113 return -EROFS; 3114 3115 if (!S_ISREG(src->i_mode) || !S_ISREG(dst->i_mode)) 3116 return -EINVAL; 3117 3118 if (IS_ENCRYPTED(src) || IS_ENCRYPTED(dst)) 3119 return -EOPNOTSUPP; 3120 3121 if (pos_out < 0 || pos_in < 0) 3122 return -EINVAL; 3123 3124 if (src == dst) { 3125 if (pos_in == pos_out) 3126 return 0; 3127 if (pos_out > pos_in && pos_out < pos_in + len) 3128 return -EINVAL; 3129 } 3130 3131 inode_lock(src); 3132 if (src != dst) { 3133 ret = -EBUSY; 3134 if (!inode_trylock(dst)) 3135 goto out; 3136 } 3137 3138 if (f2fs_compressed_file(src) || f2fs_compressed_file(dst) || 3139 f2fs_is_pinned_file(src) || f2fs_is_pinned_file(dst)) { 3140 ret = -EOPNOTSUPP; 3141 goto out_unlock; 3142 } 3143 3144 if (f2fs_is_atomic_file(src) || f2fs_is_atomic_file(dst)) { 3145 ret = -EINVAL; 3146 goto out_unlock; 3147 } 3148 3149 ret = -EINVAL; 3150 if (pos_in + len > src->i_size || pos_in + len < pos_in) 3151 goto out_unlock; 3152 if (len == 0) 3153 olen = len = src->i_size - pos_in; 3154 if (pos_in + len == src->i_size) 3155 len = ALIGN(src->i_size, F2FS_BLKSIZE) - pos_in; 3156 if (len == 0) { 3157 ret = 0; 3158 goto out_unlock; 3159 } 3160 3161 dst_osize = dst->i_size; 3162 if (pos_out + olen > dst->i_size) 3163 dst_max_i_size = pos_out + olen; 3164 3165 /* verify the end result is block aligned */ 3166 if (!IS_ALIGNED(pos_in, F2FS_BLKSIZE) || 3167 !IS_ALIGNED(pos_in + len, F2FS_BLKSIZE) || 3168 !IS_ALIGNED(pos_out, F2FS_BLKSIZE)) 3169 goto out_unlock; 3170 3171 ret = f2fs_convert_inline_inode(src); 3172 if (ret) 3173 goto out_unlock; 3174 3175 ret = f2fs_convert_inline_inode(dst); 3176 if (ret) 3177 goto out_unlock; 3178 3179 /* write out all dirty pages from offset */ 3180 ret = filemap_write_and_wait_range(src->i_mapping, 3181 pos_in, pos_in + len); 3182 if (ret) 3183 goto out_unlock; 3184 3185 ret = filemap_write_and_wait_range(dst->i_mapping, 3186 pos_out, pos_out + len); 3187 if (ret) 3188 goto out_unlock; 3189 3190 f2fs_balance_fs(sbi, true); 3191 3192 f2fs_down_write(&F2FS_I(src)->i_gc_rwsem[WRITE]); 3193 if (src != dst) { 3194 ret = -EBUSY; 3195 if (!f2fs_down_write_trylock(&F2FS_I(dst)->i_gc_rwsem[WRITE])) 3196 goto out_src; 3197 } 3198 3199 f2fs_lock_op(sbi, &lc); 3200 ret = __exchange_data_block(src, dst, F2FS_BYTES_TO_BLK(pos_in), 3201 F2FS_BYTES_TO_BLK(pos_out), 3202 F2FS_BYTES_TO_BLK(len), false); 3203 3204 if (!ret) { 3205 if (dst_max_i_size) 3206 f2fs_i_size_write(dst, dst_max_i_size); 3207 else if (dst_osize != dst->i_size) 3208 f2fs_i_size_write(dst, dst_osize); 3209 } 3210 f2fs_unlock_op(sbi, &lc); 3211 3212 if (src != dst) 3213 f2fs_up_write(&F2FS_I(dst)->i_gc_rwsem[WRITE]); 3214 out_src: 3215 f2fs_up_write(&F2FS_I(src)->i_gc_rwsem[WRITE]); 3216 if (ret) 3217 goto out_unlock; 3218 3219 inode_set_mtime_to_ts(src, inode_set_ctime_current(src)); 3220 f2fs_mark_inode_dirty_sync(src, false); 3221 if (src != dst) { 3222 inode_set_mtime_to_ts(dst, inode_set_ctime_current(dst)); 3223 f2fs_mark_inode_dirty_sync(dst, false); 3224 } 3225 f2fs_update_time(sbi, REQ_TIME); 3226 3227 out_unlock: 3228 if (src != dst) 3229 inode_unlock(dst); 3230 out: 3231 inode_unlock(src); 3232 return ret; 3233 } 3234 3235 static int __f2fs_ioc_move_range(struct file *filp, 3236 struct f2fs_move_range *range) 3237 { 3238 int err; 3239 3240 if (!(filp->f_mode & FMODE_READ) || 3241 !(filp->f_mode & FMODE_WRITE)) 3242 return -EBADF; 3243 3244 CLASS(fd, dst)(range->dst_fd); 3245 if (fd_empty(dst)) 3246 return -EBADF; 3247 3248 if (!(fd_file(dst)->f_mode & FMODE_WRITE)) 3249 return -EBADF; 3250 3251 err = mnt_want_write_file(filp); 3252 if (err) 3253 return err; 3254 3255 err = f2fs_move_file_range(filp, range->pos_in, fd_file(dst), 3256 range->pos_out, range->len); 3257 3258 mnt_drop_write_file(filp); 3259 return err; 3260 } 3261 3262 static int f2fs_ioc_move_range(struct file *filp, unsigned long arg) 3263 { 3264 struct f2fs_move_range range; 3265 3266 if (copy_from_user(&range, (struct f2fs_move_range __user *)arg, 3267 sizeof(range))) 3268 return -EFAULT; 3269 return __f2fs_ioc_move_range(filp, &range); 3270 } 3271 3272 static int f2fs_ioc_flush_device(struct file *filp, unsigned long arg) 3273 { 3274 struct inode *inode = file_inode(filp); 3275 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 3276 struct sit_info *sm = SIT_I(sbi); 3277 unsigned int start_segno = 0, end_segno = 0; 3278 unsigned int dev_start_segno = 0, dev_end_segno = 0; 3279 struct f2fs_flush_device range; 3280 struct f2fs_gc_control gc_control = { 3281 .init_gc_type = FG_GC, 3282 .should_migrate_blocks = true, 3283 .err_gc_skipped = true, 3284 .nr_free_secs = 0 }; 3285 int ret; 3286 3287 if (!capable(CAP_SYS_ADMIN)) 3288 return -EPERM; 3289 3290 if (f2fs_readonly(sbi->sb)) 3291 return -EROFS; 3292 3293 if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) 3294 return -EINVAL; 3295 3296 if (copy_from_user(&range, (struct f2fs_flush_device __user *)arg, 3297 sizeof(range))) 3298 return -EFAULT; 3299 3300 if (!f2fs_is_multi_device(sbi) || sbi->s_ndevs - 1 <= range.dev_num || 3301 __is_large_section(sbi)) { 3302 f2fs_warn(sbi, "Can't flush %u in %d for SEGS_PER_SEC %u != 1", 3303 range.dev_num, sbi->s_ndevs, SEGS_PER_SEC(sbi)); 3304 return -EINVAL; 3305 } 3306 3307 ret = mnt_want_write_file(filp); 3308 if (ret) 3309 return ret; 3310 3311 if (range.dev_num != 0) 3312 dev_start_segno = GET_SEGNO(sbi, FDEV(range.dev_num).start_blk); 3313 dev_end_segno = GET_SEGNO(sbi, FDEV(range.dev_num).end_blk); 3314 3315 start_segno = sm->last_victim[FLUSH_DEVICE]; 3316 if (start_segno < dev_start_segno || start_segno >= dev_end_segno) 3317 start_segno = dev_start_segno; 3318 end_segno = min(start_segno + range.segments, dev_end_segno); 3319 3320 while (start_segno < end_segno) { 3321 if (!f2fs_down_write_trylock_trace(&sbi->gc_lock, &gc_control.lc)) { 3322 ret = -EBUSY; 3323 goto out; 3324 } 3325 sm->last_victim[GC_CB] = end_segno + 1; 3326 sm->last_victim[GC_GREEDY] = end_segno + 1; 3327 sm->last_victim[ALLOC_NEXT] = end_segno + 1; 3328 3329 gc_control.victim_segno = start_segno; 3330 stat_inc_gc_call_count(sbi, FOREGROUND); 3331 ret = f2fs_gc(sbi, &gc_control); 3332 if (ret == -EAGAIN) 3333 ret = 0; 3334 else if (ret < 0) 3335 break; 3336 start_segno++; 3337 } 3338 out: 3339 mnt_drop_write_file(filp); 3340 return ret; 3341 } 3342 3343 static int f2fs_ioc_get_features(struct file *filp, unsigned long arg) 3344 { 3345 struct inode *inode = file_inode(filp); 3346 u32 sb_feature = le32_to_cpu(F2FS_I_SB(inode)->raw_super->feature); 3347 3348 /* Must validate to set it with SQLite behavior in Android. */ 3349 sb_feature |= F2FS_FEATURE_ATOMIC_WRITE; 3350 3351 return put_user(sb_feature, (u32 __user *)arg); 3352 } 3353 3354 #ifdef CONFIG_QUOTA 3355 int f2fs_transfer_project_quota(struct inode *inode, kprojid_t kprojid) 3356 { 3357 struct dquot *transfer_to[MAXQUOTAS] = {}; 3358 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 3359 struct super_block *sb = sbi->sb; 3360 int err; 3361 3362 transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid)); 3363 if (IS_ERR(transfer_to[PRJQUOTA])) 3364 return PTR_ERR(transfer_to[PRJQUOTA]); 3365 3366 err = __dquot_transfer(inode, transfer_to); 3367 if (err) 3368 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR); 3369 dqput(transfer_to[PRJQUOTA]); 3370 return err; 3371 } 3372 3373 static int f2fs_ioc_setproject(struct inode *inode, __u32 projid) 3374 { 3375 struct f2fs_inode_info *fi = F2FS_I(inode); 3376 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 3377 struct f2fs_inode *ri = NULL; 3378 struct f2fs_lock_context lc; 3379 kprojid_t kprojid; 3380 int err; 3381 3382 if (!f2fs_sb_has_project_quota(sbi)) { 3383 if (projid != F2FS_DEF_PROJID) 3384 return -EOPNOTSUPP; 3385 else 3386 return 0; 3387 } 3388 3389 if (!f2fs_has_extra_attr(inode)) 3390 return -EOPNOTSUPP; 3391 3392 kprojid = make_kprojid(&init_user_ns, (projid_t)projid); 3393 3394 if (projid_eq(kprojid, fi->i_projid)) 3395 return 0; 3396 3397 err = -EPERM; 3398 /* Is it quota file? Do not allow user to mess with it */ 3399 if (IS_NOQUOTA(inode)) 3400 return err; 3401 3402 if (!F2FS_FITS_IN_INODE(ri, fi->i_extra_isize, i_projid)) 3403 return -EOVERFLOW; 3404 3405 err = f2fs_dquot_initialize(inode); 3406 if (err) 3407 return err; 3408 3409 f2fs_lock_op(sbi, &lc); 3410 err = f2fs_transfer_project_quota(inode, kprojid); 3411 if (err) 3412 goto out_unlock; 3413 3414 fi->i_projid = kprojid; 3415 inode_set_ctime_current(inode); 3416 f2fs_mark_inode_dirty_sync(inode, true); 3417 out_unlock: 3418 f2fs_unlock_op(sbi, &lc); 3419 return err; 3420 } 3421 #else 3422 int f2fs_transfer_project_quota(struct inode *inode, kprojid_t kprojid) 3423 { 3424 return 0; 3425 } 3426 3427 static int f2fs_ioc_setproject(struct inode *inode, __u32 projid) 3428 { 3429 if (projid != F2FS_DEF_PROJID) 3430 return -EOPNOTSUPP; 3431 return 0; 3432 } 3433 #endif 3434 3435 int f2fs_fileattr_get(struct dentry *dentry, struct file_kattr *fa) 3436 { 3437 struct inode *inode = d_inode(dentry); 3438 struct f2fs_inode_info *fi = F2FS_I(inode); 3439 u32 fsflags = f2fs_iflags_to_fsflags(fi->i_flags); 3440 3441 if (IS_ENCRYPTED(inode)) 3442 fsflags |= FS_ENCRYPT_FL; 3443 if (IS_VERITY(inode)) 3444 fsflags |= FS_VERITY_FL; 3445 if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode)) 3446 fsflags |= FS_INLINE_DATA_FL; 3447 if (is_inode_flag_set(inode, FI_PIN_FILE)) 3448 fsflags |= FS_NOCOW_FL; 3449 3450 fileattr_fill_flags(fa, fsflags & F2FS_GETTABLE_FS_FL); 3451 3452 if (f2fs_sb_has_project_quota(F2FS_I_SB(inode))) 3453 fa->fsx_projid = from_kprojid(&init_user_ns, fi->i_projid); 3454 3455 return 0; 3456 } 3457 3458 int f2fs_fileattr_set(struct mnt_idmap *idmap, 3459 struct dentry *dentry, struct file_kattr *fa) 3460 { 3461 struct inode *inode = d_inode(dentry); 3462 u32 fsflags = fa->flags, mask = F2FS_SETTABLE_FS_FL; 3463 u32 iflags; 3464 int err; 3465 3466 if (unlikely(f2fs_cp_error(F2FS_I_SB(inode)))) 3467 return -EIO; 3468 if (!f2fs_is_checkpoint_ready(F2FS_I_SB(inode))) 3469 return -ENOSPC; 3470 if (fsflags & ~F2FS_GETTABLE_FS_FL) 3471 return -EOPNOTSUPP; 3472 fsflags &= F2FS_SETTABLE_FS_FL; 3473 if (!fa->flags_valid) 3474 mask &= FS_COMMON_FL; 3475 3476 iflags = f2fs_fsflags_to_iflags(fsflags); 3477 if (f2fs_mask_flags(inode->i_mode, iflags) != iflags) 3478 return -EOPNOTSUPP; 3479 3480 err = f2fs_setflags_common(inode, iflags, f2fs_fsflags_to_iflags(mask)); 3481 if (!err) 3482 err = f2fs_ioc_setproject(inode, fa->fsx_projid); 3483 3484 return err; 3485 } 3486 3487 int f2fs_pin_file_control(struct inode *inode, bool inc) 3488 { 3489 struct f2fs_inode_info *fi = F2FS_I(inode); 3490 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 3491 3492 if (IS_DEVICE_ALIASING(inode)) 3493 return -EINVAL; 3494 3495 if (fi->i_gc_failures >= sbi->gc_pin_file_threshold) { 3496 f2fs_warn(sbi, "%s: Enable GC = ino %llx after %x GC trials", 3497 __func__, inode->i_ino, fi->i_gc_failures); 3498 clear_inode_flag(inode, FI_PIN_FILE); 3499 return -EAGAIN; 3500 } 3501 3502 /* Use i_gc_failures for normal file as a risk signal. */ 3503 if (inc) 3504 f2fs_i_gc_failures_write(inode, fi->i_gc_failures + 1); 3505 3506 return 0; 3507 } 3508 3509 static int f2fs_ioc_set_pin_file(struct file *filp, unsigned long arg) 3510 { 3511 struct inode *inode = file_inode(filp); 3512 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 3513 __u32 pin; 3514 int ret = 0; 3515 3516 if (get_user(pin, (__u32 __user *)arg)) 3517 return -EFAULT; 3518 3519 if (!S_ISREG(inode->i_mode)) 3520 return -EINVAL; 3521 3522 if (f2fs_readonly(sbi->sb)) 3523 return -EROFS; 3524 3525 if (!pin && IS_DEVICE_ALIASING(inode)) 3526 return -EOPNOTSUPP; 3527 3528 ret = mnt_want_write_file(filp); 3529 if (ret) 3530 return ret; 3531 3532 inode_lock(inode); 3533 3534 if (f2fs_is_atomic_file(inode)) { 3535 ret = -EINVAL; 3536 goto out; 3537 } 3538 3539 if (!pin) { 3540 clear_inode_flag(inode, FI_PIN_FILE); 3541 f2fs_i_gc_failures_write(inode, 0); 3542 goto done; 3543 } else if (f2fs_is_pinned_file(inode)) { 3544 goto done; 3545 } 3546 3547 if (F2FS_HAS_BLOCKS(inode)) { 3548 ret = -EFBIG; 3549 goto out; 3550 } 3551 3552 /* Let's allow file pinning on zoned device. */ 3553 if (!f2fs_sb_has_blkzoned(sbi) && 3554 f2fs_should_update_outplace(inode, NULL)) { 3555 ret = -EINVAL; 3556 goto out; 3557 } 3558 3559 if (f2fs_pin_file_control(inode, false)) { 3560 ret = -EAGAIN; 3561 goto out; 3562 } 3563 3564 ret = f2fs_convert_inline_inode(inode); 3565 if (ret) 3566 goto out; 3567 3568 if (!f2fs_disable_compressed_file(inode)) { 3569 ret = -EOPNOTSUPP; 3570 goto out; 3571 } 3572 3573 set_inode_flag(inode, FI_PIN_FILE); 3574 ret = F2FS_I(inode)->i_gc_failures; 3575 done: 3576 f2fs_update_time(sbi, REQ_TIME); 3577 out: 3578 inode_unlock(inode); 3579 mnt_drop_write_file(filp); 3580 return ret; 3581 } 3582 3583 static int f2fs_ioc_get_pin_file(struct file *filp, unsigned long arg) 3584 { 3585 struct inode *inode = file_inode(filp); 3586 __u32 pin = 0; 3587 3588 if (is_inode_flag_set(inode, FI_PIN_FILE)) 3589 pin = F2FS_I(inode)->i_gc_failures; 3590 return put_user(pin, (u32 __user *)arg); 3591 } 3592 3593 static int f2fs_ioc_get_dev_alias_file(struct file *filp, unsigned long arg) 3594 { 3595 return put_user(IS_DEVICE_ALIASING(file_inode(filp)) ? 1 : 0, 3596 (u32 __user *)arg); 3597 } 3598 3599 static int f2fs_ioc_io_prio(struct file *filp, unsigned long arg) 3600 { 3601 struct inode *inode = file_inode(filp); 3602 __u32 level; 3603 3604 if (get_user(level, (__u32 __user *)arg)) 3605 return -EFAULT; 3606 3607 if (!S_ISREG(inode->i_mode) || level >= F2FS_IOPRIO_MAX) 3608 return -EINVAL; 3609 3610 inode_lock(inode); 3611 F2FS_I(inode)->ioprio_hint = level; 3612 inode_unlock(inode); 3613 return 0; 3614 } 3615 3616 int f2fs_precache_extents(struct inode *inode) 3617 { 3618 struct f2fs_inode_info *fi = F2FS_I(inode); 3619 struct f2fs_map_blocks map; 3620 pgoff_t m_next_extent; 3621 loff_t end; 3622 int err; 3623 3624 if (is_inode_flag_set(inode, FI_NO_EXTENT)) 3625 return -EOPNOTSUPP; 3626 3627 map.m_lblk = 0; 3628 map.m_pblk = 0; 3629 map.m_next_pgofs = NULL; 3630 map.m_next_extent = &m_next_extent; 3631 map.m_seg_type = NO_CHECK_TYPE; 3632 map.m_may_create = false; 3633 end = F2FS_BLK_ALIGN(i_size_read(inode)); 3634 3635 while (map.m_lblk < end) { 3636 map.m_len = end - map.m_lblk; 3637 3638 f2fs_down_write(&fi->i_gc_rwsem[WRITE]); 3639 err = f2fs_map_blocks(inode, &map, F2FS_GET_BLOCK_PRECACHE); 3640 f2fs_up_write(&fi->i_gc_rwsem[WRITE]); 3641 if (err || !map.m_len) 3642 return err; 3643 3644 map.m_lblk = m_next_extent; 3645 } 3646 3647 return 0; 3648 } 3649 3650 static int f2fs_ioc_precache_extents(struct file *filp) 3651 { 3652 return f2fs_precache_extents(file_inode(filp)); 3653 } 3654 3655 static int f2fs_ioc_resize_fs(struct file *filp, unsigned long arg) 3656 { 3657 struct f2fs_sb_info *sbi = F2FS_I_SB(file_inode(filp)); 3658 __u64 block_count; 3659 3660 if (!capable(CAP_SYS_ADMIN)) 3661 return -EPERM; 3662 3663 if (f2fs_readonly(sbi->sb)) 3664 return -EROFS; 3665 3666 if (copy_from_user(&block_count, (void __user *)arg, 3667 sizeof(block_count))) 3668 return -EFAULT; 3669 3670 return f2fs_resize_fs(filp, block_count); 3671 } 3672 3673 static int f2fs_ioc_enable_verity(struct file *filp, unsigned long arg) 3674 { 3675 struct inode *inode = file_inode(filp); 3676 3677 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); 3678 3679 if (!f2fs_sb_has_verity(F2FS_I_SB(inode))) { 3680 f2fs_warn(F2FS_I_SB(inode), 3681 "Can't enable fs-verity on inode %llu: the verity feature is not enabled on this filesystem", 3682 inode->i_ino); 3683 return -EOPNOTSUPP; 3684 } 3685 3686 return fsverity_ioctl_enable(filp, (const void __user *)arg); 3687 } 3688 3689 static int f2fs_ioc_measure_verity(struct file *filp, unsigned long arg) 3690 { 3691 if (!f2fs_sb_has_verity(F2FS_I_SB(file_inode(filp)))) 3692 return -EOPNOTSUPP; 3693 3694 return fsverity_ioctl_measure(filp, (void __user *)arg); 3695 } 3696 3697 static int f2fs_ioc_read_verity_metadata(struct file *filp, unsigned long arg) 3698 { 3699 if (!f2fs_sb_has_verity(F2FS_I_SB(file_inode(filp)))) 3700 return -EOPNOTSUPP; 3701 3702 return fsverity_ioctl_read_metadata(filp, (const void __user *)arg); 3703 } 3704 3705 static int f2fs_ioc_getfslabel(struct file *filp, unsigned long arg) 3706 { 3707 struct inode *inode = file_inode(filp); 3708 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 3709 char *vbuf; 3710 int count; 3711 int err = 0; 3712 3713 vbuf = f2fs_kzalloc(sbi, MAX_VOLUME_NAME, GFP_KERNEL); 3714 if (!vbuf) 3715 return -ENOMEM; 3716 3717 f2fs_down_read(&sbi->sb_lock); 3718 count = utf16s_to_utf8s(sbi->raw_super->volume_name, 3719 ARRAY_SIZE(sbi->raw_super->volume_name), 3720 UTF16_LITTLE_ENDIAN, vbuf, MAX_VOLUME_NAME); 3721 f2fs_up_read(&sbi->sb_lock); 3722 3723 if (copy_to_user((char __user *)arg, vbuf, 3724 min(FSLABEL_MAX, count))) 3725 err = -EFAULT; 3726 3727 kfree(vbuf); 3728 return err; 3729 } 3730 3731 static int f2fs_ioc_setfslabel(struct file *filp, unsigned long arg) 3732 { 3733 struct inode *inode = file_inode(filp); 3734 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 3735 char *vbuf; 3736 int err = 0; 3737 3738 if (!capable(CAP_SYS_ADMIN)) 3739 return -EPERM; 3740 3741 vbuf = strndup_user((const char __user *)arg, FSLABEL_MAX); 3742 if (IS_ERR(vbuf)) 3743 return PTR_ERR(vbuf); 3744 3745 err = mnt_want_write_file(filp); 3746 if (err) 3747 goto out; 3748 3749 f2fs_down_write(&sbi->sb_lock); 3750 3751 memset(sbi->raw_super->volume_name, 0, 3752 sizeof(sbi->raw_super->volume_name)); 3753 utf8s_to_utf16s(vbuf, strlen(vbuf), UTF16_LITTLE_ENDIAN, 3754 sbi->raw_super->volume_name, 3755 ARRAY_SIZE(sbi->raw_super->volume_name)); 3756 3757 err = f2fs_commit_super(sbi, false); 3758 3759 f2fs_up_write(&sbi->sb_lock); 3760 3761 mnt_drop_write_file(filp); 3762 out: 3763 kfree(vbuf); 3764 return err; 3765 } 3766 3767 static int f2fs_get_compress_blocks(struct inode *inode, __u64 *blocks) 3768 { 3769 if (!f2fs_sb_has_compression(F2FS_I_SB(inode))) 3770 return -EOPNOTSUPP; 3771 3772 if (!f2fs_compressed_file(inode)) 3773 return -EINVAL; 3774 3775 *blocks = atomic_read(&F2FS_I(inode)->i_compr_blocks); 3776 3777 return 0; 3778 } 3779 3780 static int f2fs_ioc_get_compress_blocks(struct file *filp, unsigned long arg) 3781 { 3782 struct inode *inode = file_inode(filp); 3783 __u64 blocks; 3784 int ret; 3785 3786 ret = f2fs_get_compress_blocks(inode, &blocks); 3787 if (ret < 0) 3788 return ret; 3789 3790 return put_user(blocks, (u64 __user *)arg); 3791 } 3792 3793 static int release_compress_blocks(struct dnode_of_data *dn, pgoff_t count) 3794 { 3795 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); 3796 unsigned int released_blocks = 0; 3797 int cluster_size = F2FS_I(dn->inode)->i_cluster_size; 3798 block_t blkaddr; 3799 int i; 3800 3801 for (i = 0; i < count; i++) { 3802 blkaddr = data_blkaddr(dn->inode, dn->node_folio, 3803 dn->ofs_in_node + i); 3804 3805 if (!__is_valid_data_blkaddr(blkaddr)) 3806 continue; 3807 if (unlikely(!f2fs_is_valid_blkaddr(sbi, blkaddr, 3808 DATA_GENERIC_ENHANCE))) 3809 return -EFSCORRUPTED; 3810 } 3811 3812 while (count) { 3813 int compr_blocks = 0; 3814 3815 for (i = 0; i < cluster_size; i++, dn->ofs_in_node++) { 3816 blkaddr = f2fs_data_blkaddr(dn); 3817 3818 if (i == 0) { 3819 if (blkaddr == COMPRESS_ADDR) 3820 continue; 3821 dn->ofs_in_node += cluster_size; 3822 goto next; 3823 } 3824 3825 if (__is_valid_data_blkaddr(blkaddr)) 3826 compr_blocks++; 3827 3828 if (blkaddr != NEW_ADDR) 3829 continue; 3830 3831 f2fs_set_data_blkaddr(dn, NULL_ADDR); 3832 } 3833 3834 f2fs_i_compr_blocks_update(dn->inode, compr_blocks, false); 3835 dec_valid_block_count(sbi, dn->inode, 3836 cluster_size - compr_blocks); 3837 3838 released_blocks += cluster_size - compr_blocks; 3839 next: 3840 count -= cluster_size; 3841 } 3842 3843 return released_blocks; 3844 } 3845 3846 static int f2fs_release_compress_blocks(struct file *filp, unsigned long arg) 3847 { 3848 struct inode *inode = file_inode(filp); 3849 struct f2fs_inode_info *fi = F2FS_I(inode); 3850 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 3851 struct f2fs_lock_context lc; 3852 pgoff_t page_idx = 0, last_idx; 3853 unsigned int released_blocks = 0; 3854 int ret; 3855 int writecount; 3856 3857 if (!f2fs_sb_has_compression(sbi)) 3858 return -EOPNOTSUPP; 3859 3860 if (f2fs_readonly(sbi->sb)) 3861 return -EROFS; 3862 3863 ret = mnt_want_write_file(filp); 3864 if (ret) 3865 return ret; 3866 3867 f2fs_balance_fs(sbi, true); 3868 3869 inode_lock(inode); 3870 3871 writecount = atomic_read(&inode->i_writecount); 3872 if ((filp->f_mode & FMODE_WRITE && writecount != 1) || 3873 (!(filp->f_mode & FMODE_WRITE) && writecount)) { 3874 ret = -EBUSY; 3875 goto out; 3876 } 3877 3878 if (!f2fs_compressed_file(inode) || 3879 is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) { 3880 ret = -EINVAL; 3881 goto out; 3882 } 3883 3884 ret = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX); 3885 if (ret) 3886 goto out; 3887 3888 if (!atomic_read(&fi->i_compr_blocks)) { 3889 ret = -EPERM; 3890 goto out; 3891 } 3892 3893 set_inode_flag(inode, FI_COMPRESS_RELEASED); 3894 inode_set_ctime_current(inode); 3895 f2fs_mark_inode_dirty_sync(inode, true); 3896 3897 f2fs_down_write(&fi->i_gc_rwsem[WRITE]); 3898 filemap_invalidate_lock(inode->i_mapping); 3899 3900 last_idx = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE); 3901 3902 while (page_idx < last_idx) { 3903 struct dnode_of_data dn; 3904 pgoff_t end_offset, count; 3905 3906 f2fs_lock_op(sbi, &lc); 3907 3908 set_new_dnode(&dn, inode, NULL, NULL, 0); 3909 ret = f2fs_get_dnode_of_data(&dn, page_idx, LOOKUP_NODE); 3910 if (ret) { 3911 f2fs_unlock_op(sbi, &lc); 3912 if (ret == -ENOENT) { 3913 page_idx = f2fs_get_next_page_offset(&dn, 3914 page_idx); 3915 ret = 0; 3916 continue; 3917 } 3918 break; 3919 } 3920 3921 end_offset = ADDRS_PER_PAGE(dn.node_folio, inode); 3922 count = min(end_offset - dn.ofs_in_node, last_idx - page_idx); 3923 count = round_up(count, fi->i_cluster_size); 3924 3925 ret = release_compress_blocks(&dn, count); 3926 3927 f2fs_put_dnode(&dn); 3928 3929 f2fs_unlock_op(sbi, &lc); 3930 3931 if (ret < 0) 3932 break; 3933 3934 page_idx += count; 3935 released_blocks += ret; 3936 } 3937 3938 filemap_invalidate_unlock(inode->i_mapping); 3939 f2fs_up_write(&fi->i_gc_rwsem[WRITE]); 3940 out: 3941 if (released_blocks) 3942 f2fs_update_time(sbi, REQ_TIME); 3943 inode_unlock(inode); 3944 3945 mnt_drop_write_file(filp); 3946 3947 if (ret >= 0) { 3948 ret = put_user(released_blocks, (u64 __user *)arg); 3949 } else if (released_blocks && 3950 atomic_read(&fi->i_compr_blocks)) { 3951 set_sbi_flag(sbi, SBI_NEED_FSCK); 3952 f2fs_warn(sbi, "%s: partial blocks were released i_ino=%llx " 3953 "iblocks=%llu, released=%u, compr_blocks=%u, " 3954 "run fsck to fix.", 3955 __func__, inode->i_ino, inode->i_blocks, 3956 released_blocks, 3957 atomic_read(&fi->i_compr_blocks)); 3958 } 3959 3960 return ret; 3961 } 3962 3963 static int reserve_compress_blocks(struct dnode_of_data *dn, pgoff_t count, 3964 unsigned int *reserved_blocks) 3965 { 3966 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); 3967 int cluster_size = F2FS_I(dn->inode)->i_cluster_size; 3968 block_t blkaddr; 3969 int i; 3970 3971 for (i = 0; i < count; i++) { 3972 blkaddr = data_blkaddr(dn->inode, dn->node_folio, 3973 dn->ofs_in_node + i); 3974 3975 if (!__is_valid_data_blkaddr(blkaddr)) 3976 continue; 3977 if (unlikely(!f2fs_is_valid_blkaddr(sbi, blkaddr, 3978 DATA_GENERIC_ENHANCE))) 3979 return -EFSCORRUPTED; 3980 } 3981 3982 while (count) { 3983 int compr_blocks = 0; 3984 blkcnt_t reserved = 0; 3985 blkcnt_t to_reserved; 3986 int ret; 3987 3988 for (i = 0; i < cluster_size; i++) { 3989 blkaddr = data_blkaddr(dn->inode, dn->node_folio, 3990 dn->ofs_in_node + i); 3991 3992 if (i == 0) { 3993 if (blkaddr != COMPRESS_ADDR) { 3994 dn->ofs_in_node += cluster_size; 3995 goto next; 3996 } 3997 continue; 3998 } 3999 4000 /* 4001 * compressed cluster was not released due to it 4002 * fails in release_compress_blocks(), so NEW_ADDR 4003 * is a possible case. 4004 */ 4005 if (blkaddr == NEW_ADDR) { 4006 reserved++; 4007 continue; 4008 } 4009 if (__is_valid_data_blkaddr(blkaddr)) { 4010 compr_blocks++; 4011 continue; 4012 } 4013 } 4014 4015 to_reserved = cluster_size - compr_blocks - reserved; 4016 4017 /* for the case all blocks in cluster were reserved */ 4018 if (reserved && to_reserved == 1) { 4019 dn->ofs_in_node += cluster_size; 4020 goto next; 4021 } 4022 4023 ret = inc_valid_block_count(sbi, dn->inode, 4024 &to_reserved, false); 4025 if (unlikely(ret)) 4026 return ret; 4027 4028 for (i = 0; i < cluster_size; i++, dn->ofs_in_node++) { 4029 if (f2fs_data_blkaddr(dn) == NULL_ADDR) 4030 f2fs_set_data_blkaddr(dn, NEW_ADDR); 4031 } 4032 4033 f2fs_i_compr_blocks_update(dn->inode, compr_blocks, true); 4034 4035 *reserved_blocks += to_reserved; 4036 next: 4037 count -= cluster_size; 4038 } 4039 4040 return 0; 4041 } 4042 4043 static int f2fs_reserve_compress_blocks(struct file *filp, unsigned long arg) 4044 { 4045 struct inode *inode = file_inode(filp); 4046 struct f2fs_inode_info *fi = F2FS_I(inode); 4047 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 4048 pgoff_t page_idx = 0, last_idx; 4049 unsigned int reserved_blocks = 0; 4050 int ret; 4051 4052 if (!f2fs_sb_has_compression(sbi)) 4053 return -EOPNOTSUPP; 4054 4055 if (f2fs_readonly(sbi->sb)) 4056 return -EROFS; 4057 4058 ret = mnt_want_write_file(filp); 4059 if (ret) 4060 return ret; 4061 4062 f2fs_balance_fs(sbi, true); 4063 4064 inode_lock(inode); 4065 4066 if (!f2fs_compressed_file(inode) || 4067 !is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) { 4068 ret = -EINVAL; 4069 goto unlock_inode; 4070 } 4071 4072 if (atomic_read(&fi->i_compr_blocks)) 4073 goto unlock_inode; 4074 4075 f2fs_down_write(&fi->i_gc_rwsem[WRITE]); 4076 filemap_invalidate_lock(inode->i_mapping); 4077 4078 last_idx = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE); 4079 4080 while (page_idx < last_idx) { 4081 struct dnode_of_data dn; 4082 struct f2fs_lock_context lc; 4083 pgoff_t end_offset, count; 4084 4085 f2fs_lock_op(sbi, &lc); 4086 4087 set_new_dnode(&dn, inode, NULL, NULL, 0); 4088 ret = f2fs_get_dnode_of_data(&dn, page_idx, LOOKUP_NODE); 4089 if (ret) { 4090 f2fs_unlock_op(sbi, &lc); 4091 if (ret == -ENOENT) { 4092 page_idx = f2fs_get_next_page_offset(&dn, 4093 page_idx); 4094 ret = 0; 4095 continue; 4096 } 4097 break; 4098 } 4099 4100 end_offset = ADDRS_PER_PAGE(dn.node_folio, inode); 4101 count = min(end_offset - dn.ofs_in_node, last_idx - page_idx); 4102 count = round_up(count, fi->i_cluster_size); 4103 4104 ret = reserve_compress_blocks(&dn, count, &reserved_blocks); 4105 4106 f2fs_put_dnode(&dn); 4107 4108 f2fs_unlock_op(sbi, &lc); 4109 4110 if (ret < 0) 4111 break; 4112 4113 page_idx += count; 4114 } 4115 4116 filemap_invalidate_unlock(inode->i_mapping); 4117 f2fs_up_write(&fi->i_gc_rwsem[WRITE]); 4118 4119 if (!ret) { 4120 clear_inode_flag(inode, FI_COMPRESS_RELEASED); 4121 inode_set_ctime_current(inode); 4122 f2fs_mark_inode_dirty_sync(inode, true); 4123 } 4124 unlock_inode: 4125 if (reserved_blocks) 4126 f2fs_update_time(sbi, REQ_TIME); 4127 inode_unlock(inode); 4128 mnt_drop_write_file(filp); 4129 4130 if (!ret) { 4131 ret = put_user(reserved_blocks, (u64 __user *)arg); 4132 } else if (reserved_blocks && 4133 atomic_read(&fi->i_compr_blocks)) { 4134 set_sbi_flag(sbi, SBI_NEED_FSCK); 4135 f2fs_warn(sbi, "%s: partial blocks were reserved i_ino=%llx " 4136 "iblocks=%llu, reserved=%u, compr_blocks=%u, " 4137 "run fsck to fix.", 4138 __func__, inode->i_ino, inode->i_blocks, 4139 reserved_blocks, 4140 atomic_read(&fi->i_compr_blocks)); 4141 } 4142 4143 return ret; 4144 } 4145 4146 static int f2fs_secure_erase(struct block_device *bdev, struct inode *inode, 4147 pgoff_t off, block_t block, block_t len, u32 flags) 4148 { 4149 sector_t sector = SECTOR_FROM_BLOCK(block); 4150 sector_t nr_sects = SECTOR_FROM_BLOCK(len); 4151 int ret = 0; 4152 4153 if (flags & F2FS_TRIM_FILE_DISCARD) { 4154 if (bdev_max_secure_erase_sectors(bdev)) 4155 ret = blkdev_issue_secure_erase(bdev, sector, nr_sects, 4156 GFP_NOFS); 4157 else 4158 ret = blkdev_issue_discard(bdev, sector, nr_sects, 4159 GFP_NOFS); 4160 } 4161 4162 if (!ret && (flags & F2FS_TRIM_FILE_ZEROOUT)) { 4163 if (IS_ENCRYPTED(inode)) 4164 ret = fscrypt_zeroout_range(inode, 4165 (loff_t)off << inode->i_blkbits, sector, 4166 (u64)len << inode->i_blkbits); 4167 else 4168 ret = blkdev_issue_zeroout(bdev, sector, nr_sects, 4169 GFP_NOFS, 0); 4170 } 4171 4172 return ret; 4173 } 4174 4175 static int f2fs_sec_trim_file(struct file *filp, unsigned long arg) 4176 { 4177 struct inode *inode = file_inode(filp); 4178 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 4179 struct address_space *mapping = inode->i_mapping; 4180 struct block_device *prev_bdev = NULL; 4181 struct f2fs_sectrim_range range; 4182 pgoff_t index, pg_end, prev_index = 0; 4183 block_t prev_block = 0, len = 0; 4184 loff_t end_addr; 4185 bool to_end = false; 4186 int ret = 0; 4187 4188 if (!(filp->f_mode & FMODE_WRITE)) 4189 return -EBADF; 4190 4191 if (copy_from_user(&range, (struct f2fs_sectrim_range __user *)arg, 4192 sizeof(range))) 4193 return -EFAULT; 4194 4195 if (range.flags == 0 || (range.flags & ~F2FS_TRIM_FILE_MASK) || 4196 !S_ISREG(inode->i_mode)) 4197 return -EINVAL; 4198 4199 if (((range.flags & F2FS_TRIM_FILE_DISCARD) && 4200 !f2fs_hw_support_discard(sbi)) || 4201 ((range.flags & F2FS_TRIM_FILE_ZEROOUT) && 4202 IS_ENCRYPTED(inode) && f2fs_is_multi_device(sbi))) 4203 return -EOPNOTSUPP; 4204 4205 ret = mnt_want_write_file(filp); 4206 if (ret) 4207 return ret; 4208 inode_lock(inode); 4209 4210 if (f2fs_is_atomic_file(inode) || f2fs_compressed_file(inode) || 4211 range.start >= inode->i_size) { 4212 ret = -EINVAL; 4213 goto err; 4214 } 4215 4216 if (range.len == 0) 4217 goto err; 4218 4219 if (inode->i_size - range.start > range.len) { 4220 end_addr = range.start + range.len; 4221 } else { 4222 end_addr = range.len == (u64)-1 ? 4223 sbi->sb->s_maxbytes : inode->i_size; 4224 to_end = true; 4225 } 4226 4227 if (!IS_ALIGNED(range.start, F2FS_BLKSIZE) || 4228 (!to_end && !IS_ALIGNED(end_addr, F2FS_BLKSIZE))) { 4229 ret = -EINVAL; 4230 goto err; 4231 } 4232 4233 index = F2FS_BYTES_TO_BLK(range.start); 4234 pg_end = DIV_ROUND_UP(end_addr, F2FS_BLKSIZE); 4235 4236 ret = f2fs_convert_inline_inode(inode); 4237 if (ret) 4238 goto err; 4239 4240 f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); 4241 filemap_invalidate_lock(mapping); 4242 4243 ret = filemap_write_and_wait_range(mapping, range.start, 4244 to_end ? LLONG_MAX : end_addr - 1); 4245 if (ret) 4246 goto out; 4247 4248 truncate_inode_pages_range(mapping, range.start, 4249 to_end ? -1 : end_addr - 1); 4250 4251 while (index < pg_end) { 4252 struct dnode_of_data dn; 4253 pgoff_t end_offset, count; 4254 int i; 4255 4256 set_new_dnode(&dn, inode, NULL, NULL, 0); 4257 ret = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE); 4258 if (ret) { 4259 if (ret == -ENOENT) { 4260 index = f2fs_get_next_page_offset(&dn, index); 4261 continue; 4262 } 4263 goto out; 4264 } 4265 4266 end_offset = ADDRS_PER_PAGE(dn.node_folio, inode); 4267 count = min(end_offset - dn.ofs_in_node, pg_end - index); 4268 for (i = 0; i < count; i++, index++, dn.ofs_in_node++) { 4269 struct block_device *cur_bdev; 4270 block_t blkaddr = f2fs_data_blkaddr(&dn); 4271 4272 if (!__is_valid_data_blkaddr(blkaddr)) 4273 continue; 4274 4275 if (!f2fs_is_valid_blkaddr(sbi, blkaddr, 4276 DATA_GENERIC_ENHANCE)) { 4277 ret = -EFSCORRUPTED; 4278 f2fs_put_dnode(&dn); 4279 goto out; 4280 } 4281 4282 cur_bdev = f2fs_target_device(sbi, blkaddr, NULL); 4283 if (f2fs_is_multi_device(sbi)) { 4284 int di = f2fs_target_device_index(sbi, blkaddr); 4285 4286 blkaddr -= FDEV(di).start_blk; 4287 } 4288 4289 if (len) { 4290 if (prev_bdev == cur_bdev && 4291 index == prev_index + len && 4292 blkaddr == prev_block + len) { 4293 len++; 4294 } else { 4295 ret = f2fs_secure_erase(prev_bdev, 4296 inode, prev_index, prev_block, 4297 len, range.flags); 4298 if (ret) { 4299 f2fs_put_dnode(&dn); 4300 goto out; 4301 } 4302 4303 len = 0; 4304 } 4305 } 4306 4307 if (!len) { 4308 prev_bdev = cur_bdev; 4309 prev_index = index; 4310 prev_block = blkaddr; 4311 len = 1; 4312 } 4313 } 4314 4315 f2fs_put_dnode(&dn); 4316 4317 if (fatal_signal_pending(current)) { 4318 ret = -EINTR; 4319 goto out; 4320 } 4321 cond_resched(); 4322 } 4323 4324 if (len) 4325 ret = f2fs_secure_erase(prev_bdev, inode, prev_index, 4326 prev_block, len, range.flags); 4327 f2fs_update_time(sbi, REQ_TIME); 4328 out: 4329 filemap_invalidate_unlock(mapping); 4330 f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); 4331 err: 4332 inode_unlock(inode); 4333 mnt_drop_write_file(filp); 4334 4335 return ret; 4336 } 4337 4338 static int f2fs_ioc_get_compress_option(struct file *filp, unsigned long arg) 4339 { 4340 struct inode *inode = file_inode(filp); 4341 struct f2fs_comp_option option; 4342 4343 if (!f2fs_sb_has_compression(F2FS_I_SB(inode))) 4344 return -EOPNOTSUPP; 4345 4346 inode_lock_shared(inode); 4347 4348 if (!f2fs_compressed_file(inode)) { 4349 inode_unlock_shared(inode); 4350 return -ENODATA; 4351 } 4352 4353 option.algorithm = F2FS_I(inode)->i_compress_algorithm; 4354 option.log_cluster_size = F2FS_I(inode)->i_log_cluster_size; 4355 4356 inode_unlock_shared(inode); 4357 4358 if (copy_to_user((struct f2fs_comp_option __user *)arg, &option, 4359 sizeof(option))) 4360 return -EFAULT; 4361 4362 return 0; 4363 } 4364 4365 static int f2fs_ioc_set_compress_option(struct file *filp, unsigned long arg) 4366 { 4367 struct inode *inode = file_inode(filp); 4368 struct f2fs_inode_info *fi = F2FS_I(inode); 4369 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 4370 struct f2fs_comp_option option; 4371 int ret = 0; 4372 4373 if (!f2fs_sb_has_compression(sbi)) 4374 return -EOPNOTSUPP; 4375 4376 if (!(filp->f_mode & FMODE_WRITE)) 4377 return -EBADF; 4378 4379 if (copy_from_user(&option, (struct f2fs_comp_option __user *)arg, 4380 sizeof(option))) 4381 return -EFAULT; 4382 4383 if (option.log_cluster_size < MIN_COMPRESS_LOG_SIZE || 4384 option.log_cluster_size > MAX_COMPRESS_LOG_SIZE || 4385 option.algorithm >= COMPRESS_MAX) 4386 return -EINVAL; 4387 4388 ret = mnt_want_write_file(filp); 4389 if (ret) 4390 return ret; 4391 inode_lock(inode); 4392 4393 f2fs_down_write(&F2FS_I(inode)->i_sem); 4394 if (!f2fs_compressed_file(inode)) { 4395 ret = -EINVAL; 4396 goto out; 4397 } 4398 4399 if (f2fs_is_mmap_file(inode) || get_dirty_pages(inode)) { 4400 ret = -EBUSY; 4401 goto out; 4402 } 4403 4404 if (F2FS_HAS_BLOCKS(inode)) { 4405 ret = -EFBIG; 4406 goto out; 4407 } 4408 4409 fi->i_compress_algorithm = option.algorithm; 4410 fi->i_log_cluster_size = option.log_cluster_size; 4411 fi->i_cluster_size = BIT(option.log_cluster_size); 4412 /* Set default level */ 4413 if (fi->i_compress_algorithm == COMPRESS_ZSTD) 4414 fi->i_compress_level = F2FS_ZSTD_DEFAULT_CLEVEL; 4415 else 4416 fi->i_compress_level = 0; 4417 /* Adjust mount option level */ 4418 if (option.algorithm == F2FS_OPTION(sbi).compress_algorithm && 4419 F2FS_OPTION(sbi).compress_level) 4420 fi->i_compress_level = F2FS_OPTION(sbi).compress_level; 4421 f2fs_mark_inode_dirty_sync(inode, true); 4422 4423 if (!f2fs_is_compress_backend_ready(inode)) 4424 f2fs_warn(sbi, "compression algorithm is successfully set, " 4425 "but current kernel doesn't support this algorithm."); 4426 out: 4427 f2fs_up_write(&fi->i_sem); 4428 inode_unlock(inode); 4429 mnt_drop_write_file(filp); 4430 4431 return ret; 4432 } 4433 4434 static int redirty_blocks(struct inode *inode, pgoff_t page_idx, int len) 4435 { 4436 DEFINE_READAHEAD(ractl, NULL, NULL, inode->i_mapping, page_idx); 4437 struct address_space *mapping = inode->i_mapping; 4438 struct folio *folio; 4439 pgoff_t redirty_idx = page_idx; 4440 int page_len = 0, ret = 0; 4441 4442 filemap_invalidate_lock_shared(mapping); 4443 page_cache_ra_unbounded(&ractl, len, 0); 4444 filemap_invalidate_unlock_shared(mapping); 4445 4446 do { 4447 folio = read_cache_folio(mapping, page_idx, NULL, NULL); 4448 if (IS_ERR(folio)) { 4449 ret = PTR_ERR(folio); 4450 break; 4451 } 4452 page_len += folio_nr_pages(folio) - (page_idx - folio->index); 4453 page_idx = folio_next_index(folio); 4454 } while (page_len < len); 4455 4456 do { 4457 folio = filemap_lock_folio(mapping, redirty_idx); 4458 4459 /* It will never fail, when folio has pinned above */ 4460 f2fs_bug_on(F2FS_I_SB(inode), IS_ERR(folio)); 4461 4462 f2fs_folio_wait_writeback(folio, DATA, true, true); 4463 4464 folio_mark_dirty(folio); 4465 folio_set_f2fs_gcing(folio); 4466 redirty_idx = folio_next_index(folio); 4467 folio_unlock(folio); 4468 folio_put_refs(folio, 2); 4469 } while (redirty_idx < page_idx); 4470 4471 return ret; 4472 } 4473 4474 static int f2fs_ioc_decompress_file(struct file *filp) 4475 { 4476 struct inode *inode = file_inode(filp); 4477 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 4478 struct f2fs_inode_info *fi = F2FS_I(inode); 4479 pgoff_t page_idx = 0, last_idx, cluster_idx; 4480 int ret; 4481 4482 if (!f2fs_sb_has_compression(sbi) || 4483 F2FS_OPTION(sbi).compress_mode != COMPR_MODE_USER) 4484 return -EOPNOTSUPP; 4485 4486 if (!(filp->f_mode & FMODE_WRITE)) 4487 return -EBADF; 4488 4489 f2fs_balance_fs(sbi, true); 4490 4491 ret = mnt_want_write_file(filp); 4492 if (ret) 4493 return ret; 4494 inode_lock(inode); 4495 4496 if (!f2fs_is_compress_backend_ready(inode)) { 4497 ret = -EOPNOTSUPP; 4498 goto out; 4499 } 4500 4501 if (!f2fs_compressed_file(inode) || 4502 is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) { 4503 ret = -EINVAL; 4504 goto out; 4505 } 4506 4507 ret = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX); 4508 if (ret) 4509 goto out; 4510 4511 if (!atomic_read(&fi->i_compr_blocks)) 4512 goto out; 4513 4514 last_idx = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE); 4515 last_idx >>= fi->i_log_cluster_size; 4516 4517 for (cluster_idx = 0; cluster_idx < last_idx; cluster_idx++) { 4518 page_idx = cluster_idx << fi->i_log_cluster_size; 4519 4520 if (!f2fs_is_compressed_cluster(inode, page_idx)) 4521 continue; 4522 4523 ret = redirty_blocks(inode, page_idx, fi->i_cluster_size); 4524 if (ret < 0) 4525 break; 4526 4527 if (get_dirty_pages(inode) >= BLKS_PER_SEG(sbi)) { 4528 ret = filemap_fdatawrite(inode->i_mapping); 4529 if (ret < 0) 4530 break; 4531 } 4532 4533 cond_resched(); 4534 if (fatal_signal_pending(current)) { 4535 ret = -EINTR; 4536 break; 4537 } 4538 } 4539 4540 if (!ret) 4541 ret = filemap_write_and_wait_range(inode->i_mapping, 0, 4542 LLONG_MAX); 4543 4544 if (ret) 4545 f2fs_warn(sbi, "%s: The file might be partially decompressed (errno=%d). Please delete the file.", 4546 __func__, ret); 4547 f2fs_update_time(sbi, REQ_TIME); 4548 out: 4549 inode_unlock(inode); 4550 mnt_drop_write_file(filp); 4551 4552 return ret; 4553 } 4554 4555 static int f2fs_ioc_compress_file(struct file *filp) 4556 { 4557 struct inode *inode = file_inode(filp); 4558 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 4559 struct f2fs_inode_info *fi = F2FS_I(inode); 4560 pgoff_t page_idx = 0, last_idx, cluster_idx; 4561 int ret; 4562 4563 if (!f2fs_sb_has_compression(sbi) || 4564 F2FS_OPTION(sbi).compress_mode != COMPR_MODE_USER) 4565 return -EOPNOTSUPP; 4566 4567 if (!(filp->f_mode & FMODE_WRITE)) 4568 return -EBADF; 4569 4570 f2fs_balance_fs(sbi, true); 4571 4572 ret = mnt_want_write_file(filp); 4573 if (ret) 4574 return ret; 4575 inode_lock(inode); 4576 4577 if (!f2fs_is_compress_backend_ready(inode)) { 4578 ret = -EOPNOTSUPP; 4579 goto out; 4580 } 4581 4582 if (!f2fs_compressed_file(inode) || 4583 is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) { 4584 ret = -EINVAL; 4585 goto out; 4586 } 4587 4588 ret = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX); 4589 if (ret) 4590 goto out; 4591 4592 set_inode_flag(inode, FI_ENABLE_COMPRESS); 4593 4594 last_idx = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE); 4595 last_idx >>= fi->i_log_cluster_size; 4596 4597 for (cluster_idx = 0; cluster_idx < last_idx; cluster_idx++) { 4598 page_idx = cluster_idx << fi->i_log_cluster_size; 4599 4600 if (f2fs_is_sparse_cluster(inode, page_idx)) 4601 continue; 4602 4603 ret = redirty_blocks(inode, page_idx, fi->i_cluster_size); 4604 if (ret < 0) 4605 break; 4606 4607 if (get_dirty_pages(inode) >= BLKS_PER_SEG(sbi)) { 4608 ret = filemap_fdatawrite(inode->i_mapping); 4609 if (ret < 0) 4610 break; 4611 } 4612 4613 cond_resched(); 4614 if (fatal_signal_pending(current)) { 4615 ret = -EINTR; 4616 break; 4617 } 4618 } 4619 4620 if (!ret) 4621 ret = filemap_write_and_wait_range(inode->i_mapping, 0, 4622 LLONG_MAX); 4623 4624 clear_inode_flag(inode, FI_ENABLE_COMPRESS); 4625 4626 if (ret) 4627 f2fs_warn(sbi, "%s: The file might be partially compressed (errno=%d). Please delete the file.", 4628 __func__, ret); 4629 f2fs_update_time(sbi, REQ_TIME); 4630 out: 4631 inode_unlock(inode); 4632 mnt_drop_write_file(filp); 4633 4634 return ret; 4635 } 4636 4637 static long __f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 4638 { 4639 switch (cmd) { 4640 case FS_IOC_GETVERSION: 4641 return f2fs_ioc_getversion(filp, arg); 4642 case F2FS_IOC_START_ATOMIC_WRITE: 4643 return f2fs_ioc_start_atomic_write(filp, false); 4644 case F2FS_IOC_START_ATOMIC_REPLACE: 4645 return f2fs_ioc_start_atomic_write(filp, true); 4646 case F2FS_IOC_COMMIT_ATOMIC_WRITE: 4647 return f2fs_ioc_commit_atomic_write(filp); 4648 case F2FS_IOC_ABORT_ATOMIC_WRITE: 4649 return f2fs_ioc_abort_atomic_write(filp); 4650 case F2FS_IOC_START_VOLATILE_WRITE: 4651 case F2FS_IOC_RELEASE_VOLATILE_WRITE: 4652 return -EOPNOTSUPP; 4653 case F2FS_IOC_SHUTDOWN: 4654 return f2fs_ioc_shutdown(filp, arg); 4655 case FITRIM: 4656 return f2fs_ioc_fitrim(filp, arg); 4657 case FS_IOC_SET_ENCRYPTION_POLICY: 4658 return f2fs_ioc_set_encryption_policy(filp, arg); 4659 case FS_IOC_GET_ENCRYPTION_POLICY: 4660 return f2fs_ioc_get_encryption_policy(filp, arg); 4661 case FS_IOC_GET_ENCRYPTION_PWSALT: 4662 return f2fs_ioc_get_encryption_pwsalt(filp, arg); 4663 case FS_IOC_GET_ENCRYPTION_POLICY_EX: 4664 return f2fs_ioc_get_encryption_policy_ex(filp, arg); 4665 case FS_IOC_ADD_ENCRYPTION_KEY: 4666 return f2fs_ioc_add_encryption_key(filp, arg); 4667 case FS_IOC_REMOVE_ENCRYPTION_KEY: 4668 return f2fs_ioc_remove_encryption_key(filp, arg); 4669 case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS: 4670 return f2fs_ioc_remove_encryption_key_all_users(filp, arg); 4671 case FS_IOC_GET_ENCRYPTION_KEY_STATUS: 4672 return f2fs_ioc_get_encryption_key_status(filp, arg); 4673 case FS_IOC_GET_ENCRYPTION_NONCE: 4674 return f2fs_ioc_get_encryption_nonce(filp, arg); 4675 case F2FS_IOC_GARBAGE_COLLECT: 4676 return f2fs_ioc_gc(filp, arg); 4677 case F2FS_IOC_GARBAGE_COLLECT_RANGE: 4678 return f2fs_ioc_gc_range(filp, arg); 4679 case F2FS_IOC_WRITE_CHECKPOINT: 4680 return f2fs_ioc_write_checkpoint(filp); 4681 case F2FS_IOC_DEFRAGMENT: 4682 return f2fs_ioc_defragment(filp, arg); 4683 case F2FS_IOC_MOVE_RANGE: 4684 return f2fs_ioc_move_range(filp, arg); 4685 case F2FS_IOC_FLUSH_DEVICE: 4686 return f2fs_ioc_flush_device(filp, arg); 4687 case F2FS_IOC_GET_FEATURES: 4688 return f2fs_ioc_get_features(filp, arg); 4689 case F2FS_IOC_GET_PIN_FILE: 4690 return f2fs_ioc_get_pin_file(filp, arg); 4691 case F2FS_IOC_SET_PIN_FILE: 4692 return f2fs_ioc_set_pin_file(filp, arg); 4693 case F2FS_IOC_PRECACHE_EXTENTS: 4694 return f2fs_ioc_precache_extents(filp); 4695 case F2FS_IOC_RESIZE_FS: 4696 return f2fs_ioc_resize_fs(filp, arg); 4697 case FS_IOC_ENABLE_VERITY: 4698 return f2fs_ioc_enable_verity(filp, arg); 4699 case FS_IOC_MEASURE_VERITY: 4700 return f2fs_ioc_measure_verity(filp, arg); 4701 case FS_IOC_READ_VERITY_METADATA: 4702 return f2fs_ioc_read_verity_metadata(filp, arg); 4703 case FS_IOC_GETFSLABEL: 4704 return f2fs_ioc_getfslabel(filp, arg); 4705 case FS_IOC_SETFSLABEL: 4706 return f2fs_ioc_setfslabel(filp, arg); 4707 case F2FS_IOC_GET_COMPRESS_BLOCKS: 4708 return f2fs_ioc_get_compress_blocks(filp, arg); 4709 case F2FS_IOC_RELEASE_COMPRESS_BLOCKS: 4710 return f2fs_release_compress_blocks(filp, arg); 4711 case F2FS_IOC_RESERVE_COMPRESS_BLOCKS: 4712 return f2fs_reserve_compress_blocks(filp, arg); 4713 case F2FS_IOC_SEC_TRIM_FILE: 4714 return f2fs_sec_trim_file(filp, arg); 4715 case F2FS_IOC_GET_COMPRESS_OPTION: 4716 return f2fs_ioc_get_compress_option(filp, arg); 4717 case F2FS_IOC_SET_COMPRESS_OPTION: 4718 return f2fs_ioc_set_compress_option(filp, arg); 4719 case F2FS_IOC_DECOMPRESS_FILE: 4720 return f2fs_ioc_decompress_file(filp); 4721 case F2FS_IOC_COMPRESS_FILE: 4722 return f2fs_ioc_compress_file(filp); 4723 case F2FS_IOC_GET_DEV_ALIAS_FILE: 4724 return f2fs_ioc_get_dev_alias_file(filp, arg); 4725 case F2FS_IOC_IO_PRIO: 4726 return f2fs_ioc_io_prio(filp, arg); 4727 default: 4728 return -ENOTTY; 4729 } 4730 } 4731 4732 long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 4733 { 4734 if (unlikely(f2fs_cp_error(F2FS_I_SB(file_inode(filp))))) 4735 return -EIO; 4736 if (!f2fs_is_checkpoint_ready(F2FS_I_SB(file_inode(filp)))) 4737 return -ENOSPC; 4738 4739 return __f2fs_ioctl(filp, cmd, arg); 4740 } 4741 4742 /* 4743 * Return %true if the given read or write request should use direct I/O, or 4744 * %false if it should use buffered I/O. 4745 */ 4746 static bool f2fs_should_use_dio(struct inode *inode, struct kiocb *iocb, 4747 struct iov_iter *iter) 4748 { 4749 unsigned int align; 4750 4751 if (!(iocb->ki_flags & IOCB_DIRECT)) 4752 return false; 4753 4754 if (f2fs_force_buffered_io(inode, iov_iter_rw(iter))) 4755 return false; 4756 4757 /* 4758 * Direct I/O not aligned to the disk's logical_block_size will be 4759 * attempted, but will fail with -EINVAL. 4760 * 4761 * f2fs additionally requires that direct I/O be aligned to the 4762 * filesystem block size, which is often a stricter requirement. 4763 * However, f2fs traditionally falls back to buffered I/O on requests 4764 * that are logical_block_size-aligned but not fs-block aligned. 4765 * 4766 * The below logic implements this behavior. 4767 */ 4768 align = iocb->ki_pos | iov_iter_alignment(iter); 4769 if (!IS_ALIGNED(align, i_blocksize(inode)) && 4770 IS_ALIGNED(align, bdev_logical_block_size(inode->i_sb->s_bdev))) 4771 return false; 4772 4773 return true; 4774 } 4775 4776 static int f2fs_dio_read_end_io(struct kiocb *iocb, ssize_t size, int error, 4777 unsigned int flags) 4778 { 4779 struct f2fs_sb_info *sbi = F2FS_I_SB(file_inode(iocb->ki_filp)); 4780 4781 dec_page_count(sbi, F2FS_DIO_READ); 4782 if (error) 4783 return error; 4784 f2fs_update_iostat(sbi, NULL, APP_DIRECT_READ_IO, size); 4785 return 0; 4786 } 4787 4788 static const struct iomap_dio_ops f2fs_iomap_dio_read_ops = { 4789 .end_io = f2fs_dio_read_end_io, 4790 }; 4791 4792 static ssize_t f2fs_dio_read_iter(struct kiocb *iocb, struct iov_iter *to) 4793 { 4794 struct file *file = iocb->ki_filp; 4795 struct inode *inode = file_inode(file); 4796 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 4797 struct f2fs_inode_info *fi = F2FS_I(inode); 4798 const loff_t pos = iocb->ki_pos; 4799 const size_t count = iov_iter_count(to); 4800 struct iomap_dio *dio; 4801 ssize_t ret; 4802 4803 if (count == 0) 4804 return 0; /* skip atime update */ 4805 4806 trace_f2fs_direct_IO_enter(inode, iocb, count, READ); 4807 4808 if (iocb->ki_flags & IOCB_NOWAIT) { 4809 if (!f2fs_down_read_trylock(&fi->i_gc_rwsem[READ])) { 4810 ret = -EAGAIN; 4811 goto out; 4812 } 4813 } else { 4814 f2fs_down_read(&fi->i_gc_rwsem[READ]); 4815 } 4816 4817 /* dio is not compatible w/ atomic file */ 4818 if (f2fs_is_atomic_file(inode)) { 4819 f2fs_up_read(&fi->i_gc_rwsem[READ]); 4820 ret = -EOPNOTSUPP; 4821 goto out; 4822 } 4823 4824 /* 4825 * We have to use __iomap_dio_rw() and iomap_dio_complete() instead of 4826 * the higher-level function iomap_dio_rw() in order to ensure that the 4827 * F2FS_DIO_READ counter will be decremented correctly in all cases. 4828 */ 4829 inc_page_count(sbi, F2FS_DIO_READ); 4830 dio = __iomap_dio_rw(iocb, to, &f2fs_iomap_ops, 4831 &f2fs_iomap_dio_read_ops, 0, NULL, 0); 4832 if (IS_ERR_OR_NULL(dio)) { 4833 ret = PTR_ERR_OR_ZERO(dio); 4834 if (ret != -EIOCBQUEUED) 4835 dec_page_count(sbi, F2FS_DIO_READ); 4836 } else { 4837 ret = iomap_dio_complete(dio); 4838 } 4839 4840 f2fs_up_read(&fi->i_gc_rwsem[READ]); 4841 4842 file_accessed(file); 4843 out: 4844 trace_f2fs_direct_IO_exit(inode, pos, count, READ, ret); 4845 return ret; 4846 } 4847 4848 static void f2fs_trace_rw_file_path(struct file *file, loff_t pos, size_t count, 4849 int rw) 4850 { 4851 struct inode *inode = file_inode(file); 4852 char *buf, *path; 4853 4854 buf = f2fs_getname(F2FS_I_SB(inode)); 4855 if (!buf) 4856 return; 4857 path = dentry_path_raw(file_dentry(file), buf, PATH_MAX); 4858 if (IS_ERR(path)) 4859 goto free_buf; 4860 if (rw == WRITE) 4861 trace_f2fs_datawrite_start(inode, pos, count, 4862 current->pid, path, current->comm); 4863 else 4864 trace_f2fs_dataread_start(inode, pos, count, 4865 current->pid, path, current->comm); 4866 free_buf: 4867 f2fs_putname(buf); 4868 } 4869 4870 static ssize_t f2fs_file_read_iter(struct kiocb *iocb, struct iov_iter *to) 4871 { 4872 struct inode *inode = file_inode(iocb->ki_filp); 4873 const loff_t pos = iocb->ki_pos; 4874 ssize_t ret; 4875 bool dio; 4876 4877 if (!f2fs_is_compress_backend_ready(inode)) 4878 return -EOPNOTSUPP; 4879 4880 if (trace_f2fs_dataread_start_enabled()) 4881 f2fs_trace_rw_file_path(iocb->ki_filp, iocb->ki_pos, 4882 iov_iter_count(to), READ); 4883 4884 dio = f2fs_should_use_dio(inode, iocb, to); 4885 4886 /* In LFS mode, if there is inflight dio, wait for its completion */ 4887 if (f2fs_lfs_mode(F2FS_I_SB(inode)) && 4888 get_pages(F2FS_I_SB(inode), F2FS_DIO_WRITE) && 4889 (!f2fs_is_pinned_file(inode) || !dio)) 4890 inode_dio_wait(inode); 4891 4892 if (dio) { 4893 ret = f2fs_dio_read_iter(iocb, to); 4894 } else { 4895 ret = filemap_read(iocb, to, 0); 4896 if (ret > 0) 4897 f2fs_update_iostat(F2FS_I_SB(inode), inode, 4898 APP_BUFFERED_READ_IO, ret); 4899 } 4900 trace_f2fs_dataread_end(inode, pos, ret); 4901 return ret; 4902 } 4903 4904 static ssize_t f2fs_file_splice_read(struct file *in, loff_t *ppos, 4905 struct pipe_inode_info *pipe, 4906 size_t len, unsigned int flags) 4907 { 4908 struct inode *inode = file_inode(in); 4909 const loff_t pos = *ppos; 4910 ssize_t ret; 4911 4912 if (!f2fs_is_compress_backend_ready(inode)) 4913 return -EOPNOTSUPP; 4914 4915 if (trace_f2fs_dataread_start_enabled()) 4916 f2fs_trace_rw_file_path(in, pos, len, READ); 4917 4918 ret = filemap_splice_read(in, ppos, pipe, len, flags); 4919 if (ret > 0) 4920 f2fs_update_iostat(F2FS_I_SB(inode), inode, 4921 APP_BUFFERED_READ_IO, ret); 4922 4923 trace_f2fs_dataread_end(inode, pos, ret); 4924 return ret; 4925 } 4926 4927 static ssize_t f2fs_write_checks(struct kiocb *iocb, struct iov_iter *from) 4928 { 4929 struct file *file = iocb->ki_filp; 4930 struct inode *inode = file_inode(file); 4931 ssize_t count; 4932 int err; 4933 4934 if (IS_IMMUTABLE(inode)) 4935 return -EPERM; 4936 4937 if (is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) 4938 return -EPERM; 4939 4940 count = generic_write_checks(iocb, from); 4941 if (count <= 0) 4942 return count; 4943 4944 err = file_modified(file); 4945 if (err) 4946 return err; 4947 4948 f2fs_zero_post_eof_page(inode, 4949 iocb->ki_pos + iov_iter_count(from), true); 4950 return count; 4951 } 4952 4953 /* 4954 * Preallocate blocks for a write request, if it is possible and helpful to do 4955 * so. Returns a positive number if blocks may have been preallocated, 0 if no 4956 * blocks were preallocated, or a negative errno value if something went 4957 * seriously wrong. Also sets FI_PREALLOCATED_ALL on the inode if *all* the 4958 * requested blocks (not just some of them) have been allocated. 4959 */ 4960 static int f2fs_preallocate_blocks(struct kiocb *iocb, struct iov_iter *iter, 4961 bool dio) 4962 { 4963 struct inode *inode = file_inode(iocb->ki_filp); 4964 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 4965 const loff_t pos = iocb->ki_pos; 4966 const size_t count = iov_iter_count(iter); 4967 struct f2fs_map_blocks map = {}; 4968 int flag; 4969 int ret; 4970 4971 /* If it will be an out-of-place direct write, don't bother. */ 4972 if (dio && f2fs_lfs_mode(sbi)) 4973 return 0; 4974 /* 4975 * Don't preallocate holes aligned to DIO_SKIP_HOLES which turns into 4976 * buffered IO, if DIO meets any holes. 4977 */ 4978 if (dio && i_size_read(inode) && 4979 (F2FS_BYTES_TO_BLK(pos) < F2FS_BLK_ALIGN(i_size_read(inode)))) 4980 return 0; 4981 4982 /* No-wait I/O can't allocate blocks. */ 4983 if (iocb->ki_flags & IOCB_NOWAIT) 4984 return 0; 4985 4986 /* If it will be a short write, don't bother. */ 4987 if (fault_in_iov_iter_readable(iter, count)) 4988 return 0; 4989 4990 if (f2fs_has_inline_data(inode)) { 4991 /* If the data will fit inline, don't bother. */ 4992 if (pos + count <= MAX_INLINE_DATA(inode)) 4993 return 0; 4994 ret = f2fs_convert_inline_inode(inode); 4995 if (ret) 4996 return ret; 4997 } 4998 4999 /* Do not preallocate blocks that will be written partially in 4KB. */ 5000 map.m_lblk = F2FS_BLK_ALIGN(pos); 5001 map.m_len = F2FS_BYTES_TO_BLK(pos + count); 5002 if (map.m_len > map.m_lblk) 5003 map.m_len -= map.m_lblk; 5004 else 5005 return 0; 5006 5007 if (!IS_DEVICE_ALIASING(inode)) 5008 map.m_may_create = true; 5009 if (dio) { 5010 map.m_seg_type = f2fs_rw_hint_to_seg_type(sbi, 5011 inode->i_write_hint); 5012 flag = F2FS_GET_BLOCK_PRE_DIO; 5013 } else { 5014 map.m_seg_type = NO_CHECK_TYPE; 5015 flag = F2FS_GET_BLOCK_PRE_AIO; 5016 } 5017 5018 ret = f2fs_map_blocks(inode, &map, flag); 5019 /* -ENOSPC|-EDQUOT are fine to report the number of allocated blocks. */ 5020 if (ret < 0 && !((ret == -ENOSPC || ret == -EDQUOT) && map.m_len > 0)) 5021 return ret; 5022 if (ret == 0) 5023 set_inode_flag(inode, FI_PREALLOCATED_ALL); 5024 return map.m_len; 5025 } 5026 5027 static ssize_t f2fs_buffered_write_iter(struct kiocb *iocb, 5028 struct iov_iter *from) 5029 { 5030 struct file *file = iocb->ki_filp; 5031 struct inode *inode = file_inode(file); 5032 ssize_t ret; 5033 5034 if (iocb->ki_flags & IOCB_NOWAIT) 5035 return -EOPNOTSUPP; 5036 5037 ret = generic_perform_write(iocb, from); 5038 5039 if (ret > 0) { 5040 f2fs_update_iostat(F2FS_I_SB(inode), inode, 5041 APP_BUFFERED_IO, ret); 5042 } 5043 return ret; 5044 } 5045 5046 static int f2fs_dio_write_end_io(struct kiocb *iocb, ssize_t size, int error, 5047 unsigned int flags) 5048 { 5049 struct f2fs_sb_info *sbi = F2FS_I_SB(file_inode(iocb->ki_filp)); 5050 5051 dec_page_count(sbi, F2FS_DIO_WRITE); 5052 if (error) 5053 return error; 5054 f2fs_update_time(sbi, REQ_TIME); 5055 f2fs_update_iostat(sbi, NULL, APP_DIRECT_IO, size); 5056 return 0; 5057 } 5058 5059 static void f2fs_dio_write_submit_io(const struct iomap_iter *iter, 5060 struct bio *bio, loff_t file_offset) 5061 { 5062 struct inode *inode = iter->inode; 5063 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 5064 enum log_type type = f2fs_rw_hint_to_seg_type(sbi, inode->i_write_hint); 5065 enum temp_type temp = f2fs_get_segment_temp(sbi, type); 5066 5067 bio->bi_write_hint = f2fs_io_type_to_rw_hint(sbi, DATA, temp); 5068 blk_crypto_submit_bio(bio); 5069 } 5070 5071 static const struct iomap_dio_ops f2fs_iomap_dio_write_ops = { 5072 .end_io = f2fs_dio_write_end_io, 5073 .submit_io = f2fs_dio_write_submit_io, 5074 }; 5075 5076 static void f2fs_flush_buffered_write(struct address_space *mapping, 5077 loff_t start_pos, loff_t end_pos) 5078 { 5079 int ret; 5080 5081 ret = filemap_write_and_wait_range(mapping, start_pos, end_pos); 5082 if (ret < 0) 5083 return; 5084 invalidate_mapping_pages(mapping, 5085 start_pos >> PAGE_SHIFT, 5086 end_pos >> PAGE_SHIFT); 5087 } 5088 5089 static ssize_t f2fs_dio_write_iter(struct kiocb *iocb, struct iov_iter *from, 5090 bool *may_need_sync) 5091 { 5092 struct file *file = iocb->ki_filp; 5093 struct inode *inode = file_inode(file); 5094 struct f2fs_inode_info *fi = F2FS_I(inode); 5095 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 5096 const bool do_opu = f2fs_lfs_mode(sbi); 5097 const loff_t pos = iocb->ki_pos; 5098 const ssize_t count = iov_iter_count(from); 5099 unsigned int dio_flags; 5100 struct iomap_dio *dio; 5101 ssize_t ret; 5102 5103 trace_f2fs_direct_IO_enter(inode, iocb, count, WRITE); 5104 5105 if (iocb->ki_flags & IOCB_NOWAIT) { 5106 /* f2fs_convert_inline_inode() and block allocation can block */ 5107 if (f2fs_has_inline_data(inode) || 5108 !f2fs_overwrite_io(inode, pos, count)) { 5109 ret = -EAGAIN; 5110 goto out; 5111 } 5112 5113 if (!f2fs_down_read_trylock(&fi->i_gc_rwsem[WRITE])) { 5114 ret = -EAGAIN; 5115 goto out; 5116 } 5117 if (do_opu && !f2fs_down_read_trylock(&fi->i_gc_rwsem[READ])) { 5118 f2fs_up_read(&fi->i_gc_rwsem[WRITE]); 5119 ret = -EAGAIN; 5120 goto out; 5121 } 5122 } else { 5123 ret = f2fs_convert_inline_inode(inode); 5124 if (ret) 5125 goto out; 5126 5127 f2fs_down_read(&fi->i_gc_rwsem[WRITE]); 5128 if (do_opu) 5129 f2fs_down_read(&fi->i_gc_rwsem[READ]); 5130 } 5131 5132 /* 5133 * We have to use __iomap_dio_rw() and iomap_dio_complete() instead of 5134 * the higher-level function iomap_dio_rw() in order to ensure that the 5135 * F2FS_DIO_WRITE counter will be decremented correctly in all cases. 5136 */ 5137 inc_page_count(sbi, F2FS_DIO_WRITE); 5138 dio_flags = 0; 5139 if (pos + count > inode->i_size) 5140 dio_flags |= IOMAP_DIO_FORCE_WAIT; 5141 dio = __iomap_dio_rw(iocb, from, &f2fs_iomap_ops, 5142 &f2fs_iomap_dio_write_ops, dio_flags, NULL, 0); 5143 if (IS_ERR_OR_NULL(dio)) { 5144 ret = PTR_ERR_OR_ZERO(dio); 5145 if (ret == -ENOTBLK) 5146 ret = 0; 5147 if (ret != -EIOCBQUEUED) 5148 dec_page_count(sbi, F2FS_DIO_WRITE); 5149 } else { 5150 ret = iomap_dio_complete(dio); 5151 } 5152 5153 if (do_opu) 5154 f2fs_up_read(&fi->i_gc_rwsem[READ]); 5155 f2fs_up_read(&fi->i_gc_rwsem[WRITE]); 5156 5157 if (ret < 0) 5158 goto out; 5159 if (pos + ret > inode->i_size) 5160 f2fs_i_size_write(inode, pos + ret); 5161 if (!do_opu) 5162 set_inode_flag(inode, FI_UPDATE_WRITE); 5163 5164 if (iov_iter_count(from)) { 5165 ssize_t ret2; 5166 loff_t bufio_start_pos = iocb->ki_pos; 5167 5168 /* 5169 * The direct write was partial, so we need to fall back to a 5170 * buffered write for the remainder. 5171 */ 5172 5173 ret2 = f2fs_buffered_write_iter(iocb, from); 5174 if (iov_iter_count(from)) 5175 f2fs_write_failed(inode, iocb->ki_pos); 5176 if (ret2 < 0) 5177 goto out; 5178 5179 /* 5180 * Ensure that the pagecache pages are written to disk and 5181 * invalidated to preserve the expected O_DIRECT semantics. 5182 */ 5183 if (ret2 > 0) { 5184 loff_t bufio_end_pos = bufio_start_pos + ret2 - 1; 5185 5186 ret += ret2; 5187 5188 f2fs_flush_buffered_write(file->f_mapping, 5189 bufio_start_pos, 5190 bufio_end_pos); 5191 } 5192 } else { 5193 /* iomap_dio_rw() already handled the generic_write_sync(). */ 5194 *may_need_sync = false; 5195 } 5196 out: 5197 trace_f2fs_direct_IO_exit(inode, pos, count, WRITE, ret); 5198 return ret; 5199 } 5200 5201 static ssize_t f2fs_file_write_iter(struct kiocb *iocb, struct iov_iter *from) 5202 { 5203 struct inode *inode = file_inode(iocb->ki_filp); 5204 const loff_t orig_pos = iocb->ki_pos; 5205 const size_t orig_count = iov_iter_count(from); 5206 loff_t target_size; 5207 bool dio; 5208 bool may_need_sync = true; 5209 int preallocated; 5210 const loff_t pos = iocb->ki_pos; 5211 const ssize_t count = iov_iter_count(from); 5212 ssize_t ret; 5213 5214 if (unlikely(f2fs_cp_error(F2FS_I_SB(inode)))) { 5215 ret = -EIO; 5216 goto out; 5217 } 5218 5219 if (!f2fs_is_compress_backend_ready(inode)) { 5220 ret = -EOPNOTSUPP; 5221 goto out; 5222 } 5223 5224 if (iocb->ki_flags & IOCB_NOWAIT) { 5225 if (!inode_trylock(inode)) { 5226 ret = -EAGAIN; 5227 goto out; 5228 } 5229 } else { 5230 inode_lock(inode); 5231 } 5232 5233 if (f2fs_is_pinned_file(inode) && 5234 !f2fs_overwrite_io(inode, pos, count)) { 5235 ret = -EIO; 5236 goto out_unlock; 5237 } 5238 5239 ret = f2fs_write_checks(iocb, from); 5240 if (ret <= 0) 5241 goto out_unlock; 5242 5243 /* Determine whether we will do a direct write or a buffered write. */ 5244 dio = f2fs_should_use_dio(inode, iocb, from); 5245 5246 /* dio is not compatible w/ atomic write */ 5247 if (dio && f2fs_is_atomic_file(inode)) { 5248 ret = -EOPNOTSUPP; 5249 goto out_unlock; 5250 } 5251 5252 /* Possibly preallocate the blocks for the write. */ 5253 target_size = iocb->ki_pos + iov_iter_count(from); 5254 preallocated = f2fs_preallocate_blocks(iocb, from, dio); 5255 if (preallocated < 0) { 5256 ret = preallocated; 5257 } else { 5258 if (trace_f2fs_datawrite_start_enabled()) 5259 f2fs_trace_rw_file_path(iocb->ki_filp, iocb->ki_pos, 5260 orig_count, WRITE); 5261 5262 /* Do the actual write. */ 5263 ret = dio ? 5264 f2fs_dio_write_iter(iocb, from, &may_need_sync) : 5265 f2fs_buffered_write_iter(iocb, from); 5266 5267 trace_f2fs_datawrite_end(inode, orig_pos, ret); 5268 } 5269 5270 /* Don't leave any preallocated blocks around past i_size. */ 5271 if (preallocated && i_size_read(inode) < target_size) { 5272 f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); 5273 filemap_invalidate_lock(inode->i_mapping); 5274 if (!f2fs_truncate(inode)) 5275 file_dont_truncate(inode); 5276 filemap_invalidate_unlock(inode->i_mapping); 5277 f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); 5278 } else { 5279 file_dont_truncate(inode); 5280 } 5281 5282 clear_inode_flag(inode, FI_PREALLOCATED_ALL); 5283 out_unlock: 5284 inode_unlock(inode); 5285 out: 5286 trace_f2fs_file_write_iter(inode, orig_pos, orig_count, ret); 5287 5288 if (ret > 0 && may_need_sync) 5289 ret = generic_write_sync(iocb, ret); 5290 5291 /* If buffered IO was forced, flush and drop the data from 5292 * the page cache to preserve O_DIRECT semantics 5293 */ 5294 if (ret > 0 && !dio && (iocb->ki_flags & IOCB_DIRECT)) 5295 f2fs_flush_buffered_write(iocb->ki_filp->f_mapping, 5296 orig_pos, 5297 orig_pos + ret - 1); 5298 5299 return ret; 5300 } 5301 5302 static int f2fs_file_fadvise(struct file *filp, loff_t offset, loff_t len, 5303 int advice) 5304 { 5305 struct address_space *mapping; 5306 struct backing_dev_info *bdi; 5307 struct inode *inode = file_inode(filp); 5308 int err; 5309 5310 trace_f2fs_fadvise(inode, offset, len, advice); 5311 5312 if (advice == POSIX_FADV_SEQUENTIAL) { 5313 if (S_ISFIFO(inode->i_mode)) 5314 return -ESPIPE; 5315 5316 mapping = filp->f_mapping; 5317 if (!mapping || len < 0) 5318 return -EINVAL; 5319 5320 bdi = inode_to_bdi(mapping->host); 5321 filp->f_ra.ra_pages = bdi->ra_pages * 5322 F2FS_I_SB(inode)->seq_file_ra_mul; 5323 spin_lock(&filp->f_lock); 5324 filp->f_mode &= ~FMODE_RANDOM; 5325 spin_unlock(&filp->f_lock); 5326 return 0; 5327 } else if (advice == POSIX_FADV_WILLNEED && offset == 0) { 5328 /* Load extent cache at the first readahead. */ 5329 f2fs_precache_extents(inode); 5330 } 5331 5332 err = generic_fadvise(filp, offset, len, advice); 5333 if (err) 5334 return err; 5335 5336 if (advice == POSIX_FADV_DONTNEED && 5337 (test_opt(F2FS_I_SB(inode), COMPRESS_CACHE) && 5338 f2fs_compressed_file(inode))) 5339 f2fs_invalidate_compress_pages(F2FS_I_SB(inode), inode->i_ino); 5340 else if (advice == POSIX_FADV_NOREUSE) 5341 err = f2fs_keep_noreuse_range(inode, offset, len); 5342 return err; 5343 } 5344 5345 #ifdef CONFIG_COMPAT 5346 struct compat_f2fs_gc_range { 5347 u32 sync; 5348 compat_u64 start; 5349 compat_u64 len; 5350 }; 5351 #define F2FS_IOC32_GARBAGE_COLLECT_RANGE _IOW(F2FS_IOCTL_MAGIC, 11,\ 5352 struct compat_f2fs_gc_range) 5353 5354 static int f2fs_compat_ioc_gc_range(struct file *file, unsigned long arg) 5355 { 5356 struct compat_f2fs_gc_range __user *urange; 5357 struct f2fs_gc_range range; 5358 int err; 5359 5360 urange = compat_ptr(arg); 5361 err = get_user(range.sync, &urange->sync); 5362 err |= get_user(range.start, &urange->start); 5363 err |= get_user(range.len, &urange->len); 5364 if (err) 5365 return -EFAULT; 5366 5367 return __f2fs_ioc_gc_range(file, &range); 5368 } 5369 5370 struct compat_f2fs_move_range { 5371 u32 dst_fd; 5372 compat_u64 pos_in; 5373 compat_u64 pos_out; 5374 compat_u64 len; 5375 }; 5376 #define F2FS_IOC32_MOVE_RANGE _IOWR(F2FS_IOCTL_MAGIC, 9, \ 5377 struct compat_f2fs_move_range) 5378 5379 static int f2fs_compat_ioc_move_range(struct file *file, unsigned long arg) 5380 { 5381 struct compat_f2fs_move_range __user *urange; 5382 struct f2fs_move_range range; 5383 int err; 5384 5385 urange = compat_ptr(arg); 5386 err = get_user(range.dst_fd, &urange->dst_fd); 5387 err |= get_user(range.pos_in, &urange->pos_in); 5388 err |= get_user(range.pos_out, &urange->pos_out); 5389 err |= get_user(range.len, &urange->len); 5390 if (err) 5391 return -EFAULT; 5392 5393 return __f2fs_ioc_move_range(file, &range); 5394 } 5395 5396 long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 5397 { 5398 if (unlikely(f2fs_cp_error(F2FS_I_SB(file_inode(file))))) 5399 return -EIO; 5400 if (!f2fs_is_checkpoint_ready(F2FS_I_SB(file_inode(file)))) 5401 return -ENOSPC; 5402 5403 switch (cmd) { 5404 case FS_IOC32_GETVERSION: 5405 cmd = FS_IOC_GETVERSION; 5406 break; 5407 case F2FS_IOC32_GARBAGE_COLLECT_RANGE: 5408 return f2fs_compat_ioc_gc_range(file, arg); 5409 case F2FS_IOC32_MOVE_RANGE: 5410 return f2fs_compat_ioc_move_range(file, arg); 5411 case F2FS_IOC_START_ATOMIC_WRITE: 5412 case F2FS_IOC_START_ATOMIC_REPLACE: 5413 case F2FS_IOC_COMMIT_ATOMIC_WRITE: 5414 case F2FS_IOC_START_VOLATILE_WRITE: 5415 case F2FS_IOC_RELEASE_VOLATILE_WRITE: 5416 case F2FS_IOC_ABORT_ATOMIC_WRITE: 5417 case F2FS_IOC_SHUTDOWN: 5418 case FITRIM: 5419 case FS_IOC_SET_ENCRYPTION_POLICY: 5420 case FS_IOC_GET_ENCRYPTION_PWSALT: 5421 case FS_IOC_GET_ENCRYPTION_POLICY: 5422 case FS_IOC_GET_ENCRYPTION_POLICY_EX: 5423 case FS_IOC_ADD_ENCRYPTION_KEY: 5424 case FS_IOC_REMOVE_ENCRYPTION_KEY: 5425 case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS: 5426 case FS_IOC_GET_ENCRYPTION_KEY_STATUS: 5427 case FS_IOC_GET_ENCRYPTION_NONCE: 5428 case F2FS_IOC_GARBAGE_COLLECT: 5429 case F2FS_IOC_WRITE_CHECKPOINT: 5430 case F2FS_IOC_DEFRAGMENT: 5431 case F2FS_IOC_FLUSH_DEVICE: 5432 case F2FS_IOC_GET_FEATURES: 5433 case F2FS_IOC_GET_PIN_FILE: 5434 case F2FS_IOC_SET_PIN_FILE: 5435 case F2FS_IOC_PRECACHE_EXTENTS: 5436 case F2FS_IOC_RESIZE_FS: 5437 case FS_IOC_ENABLE_VERITY: 5438 case FS_IOC_MEASURE_VERITY: 5439 case FS_IOC_READ_VERITY_METADATA: 5440 case FS_IOC_GETFSLABEL: 5441 case FS_IOC_SETFSLABEL: 5442 case F2FS_IOC_GET_COMPRESS_BLOCKS: 5443 case F2FS_IOC_RELEASE_COMPRESS_BLOCKS: 5444 case F2FS_IOC_RESERVE_COMPRESS_BLOCKS: 5445 case F2FS_IOC_SEC_TRIM_FILE: 5446 case F2FS_IOC_GET_COMPRESS_OPTION: 5447 case F2FS_IOC_SET_COMPRESS_OPTION: 5448 case F2FS_IOC_DECOMPRESS_FILE: 5449 case F2FS_IOC_COMPRESS_FILE: 5450 case F2FS_IOC_GET_DEV_ALIAS_FILE: 5451 case F2FS_IOC_IO_PRIO: 5452 break; 5453 default: 5454 return -ENOIOCTLCMD; 5455 } 5456 return __f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); 5457 } 5458 #endif 5459 5460 const struct file_operations f2fs_file_operations = { 5461 .llseek = f2fs_llseek, 5462 .read_iter = f2fs_file_read_iter, 5463 .write_iter = f2fs_file_write_iter, 5464 .iopoll = iocb_bio_iopoll, 5465 .open = f2fs_file_open, 5466 .release = f2fs_release_file, 5467 .mmap_prepare = f2fs_file_mmap_prepare, 5468 .flush = f2fs_file_flush, 5469 .fsync = f2fs_sync_file, 5470 .fallocate = f2fs_fallocate, 5471 .unlocked_ioctl = f2fs_ioctl, 5472 #ifdef CONFIG_COMPAT 5473 .compat_ioctl = f2fs_compat_ioctl, 5474 #endif 5475 .splice_read = f2fs_file_splice_read, 5476 .splice_write = iter_file_splice_write, 5477 .fadvise = f2fs_file_fadvise, 5478 .fop_flags = FOP_BUFFER_RASYNC, 5479 .setlease = generic_setlease, 5480 }; 5481