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1/*
2 * fs/f2fs/file.c
3 *
4 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
5 * http://www.samsung.com/
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11#include <linux/fs.h>
12#include <linux/f2fs_fs.h>
13#include <linux/stat.h>
14#include <linux/buffer_head.h>
15#include <linux/writeback.h>
16#include <linux/blkdev.h>
17#include <linux/falloc.h>
18#include <linux/types.h>
19#include <linux/compat.h>
20#include <linux/uaccess.h>
21#include <linux/mount.h>
22#include <linux/pagevec.h>
23#include <linux/random.h>
24
25#include "f2fs.h"
26#include "node.h"
27#include "segment.h"
28#include "xattr.h"
29#include "acl.h"
30#include "gc.h"
31#include "trace.h"
32#include <trace/events/f2fs.h>
33
34static int f2fs_vm_page_mkwrite(struct vm_area_struct *vma,
35 struct vm_fault *vmf)
36{
37 struct page *page = vmf->page;
38 struct inode *inode = file_inode(vma->vm_file);
39 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
40 struct dnode_of_data dn;
41 int err;
42
43 sb_start_pagefault(inode->i_sb);
44
45 f2fs_bug_on(sbi, f2fs_has_inline_data(inode));
46
47 /* block allocation */
48 f2fs_lock_op(sbi);
49 set_new_dnode(&dn, inode, NULL, NULL, 0);
50 err = f2fs_reserve_block(&dn, page->index);
51 if (err) {
52 f2fs_unlock_op(sbi);
53 goto out;
54 }
55 f2fs_put_dnode(&dn);
56 f2fs_unlock_op(sbi);
57
58 f2fs_balance_fs(sbi, dn.node_changed);
59
60 file_update_time(vma->vm_file);
61 lock_page(page);
62 if (unlikely(page->mapping != inode->i_mapping ||
63 page_offset(page) > i_size_read(inode) ||
64 !PageUptodate(page))) {
65 unlock_page(page);
66 err = -EFAULT;
67 goto out;
68 }
69
70 /*
71 * check to see if the page is mapped already (no holes)
72 */
73 if (PageMappedToDisk(page))
74 goto mapped;
75
76 /* page is wholly or partially inside EOF */
77 if (((loff_t)(page->index + 1) << PAGE_SHIFT) >
78 i_size_read(inode)) {
79 unsigned offset;
80 offset = i_size_read(inode) & ~PAGE_MASK;
81 zero_user_segment(page, offset, PAGE_SIZE);
82 }
83 set_page_dirty(page);
84 SetPageUptodate(page);
85
86 trace_f2fs_vm_page_mkwrite(page, DATA);
87mapped:
88 /* fill the page */
89 f2fs_wait_on_page_writeback(page, DATA, false);
90
91 /* wait for GCed encrypted page writeback */
92 if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode))
93 f2fs_wait_on_encrypted_page_writeback(sbi, dn.data_blkaddr);
94
95 /* if gced page is attached, don't write to cold segment */
96 clear_cold_data(page);
97out:
98 sb_end_pagefault(inode->i_sb);
99 f2fs_update_time(sbi, REQ_TIME);
100 return block_page_mkwrite_return(err);
101}
102
103static const struct vm_operations_struct f2fs_file_vm_ops = {
104 .fault = filemap_fault,
105 .map_pages = filemap_map_pages,
106 .page_mkwrite = f2fs_vm_page_mkwrite,
107};
108
109static int get_parent_ino(struct inode *inode, nid_t *pino)
110{
111 struct dentry *dentry;
112
113 inode = igrab(inode);
114 dentry = d_find_any_alias(inode);
115 iput(inode);
116 if (!dentry)
117 return 0;
118
119 if (update_dent_inode(inode, inode, &dentry->d_name)) {
120 dput(dentry);
121 return 0;
122 }
123
124 *pino = parent_ino(dentry);
125 dput(dentry);
126 return 1;
127}
128
129static inline bool need_do_checkpoint(struct inode *inode)
130{
131 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
132 bool need_cp = false;
133
134 if (!S_ISREG(inode->i_mode) || inode->i_nlink != 1)
135 need_cp = true;
136 else if (file_enc_name(inode) && need_dentry_mark(sbi, inode->i_ino))
137 need_cp = true;
138 else if (file_wrong_pino(inode))
139 need_cp = true;
140 else if (!space_for_roll_forward(sbi))
141 need_cp = true;
142 else if (!is_checkpointed_node(sbi, F2FS_I(inode)->i_pino))
143 need_cp = true;
144 else if (F2FS_I(inode)->xattr_ver == cur_cp_version(F2FS_CKPT(sbi)))
145 need_cp = true;
146 else if (test_opt(sbi, FASTBOOT))
147 need_cp = true;
148 else if (sbi->active_logs == 2)
149 need_cp = true;
150
151 return need_cp;
152}
153
154static bool need_inode_page_update(struct f2fs_sb_info *sbi, nid_t ino)
155{
156 struct page *i = find_get_page(NODE_MAPPING(sbi), ino);
157 bool ret = false;
158 /* But we need to avoid that there are some inode updates */
159 if ((i && PageDirty(i)) || need_inode_block_update(sbi, ino))
160 ret = true;
161 f2fs_put_page(i, 0);
162 return ret;
163}
164
165static void try_to_fix_pino(struct inode *inode)
166{
167 struct f2fs_inode_info *fi = F2FS_I(inode);
168 nid_t pino;
169
170 down_write(&fi->i_sem);
171 fi->xattr_ver = 0;
172 if (file_wrong_pino(inode) && inode->i_nlink == 1 &&
173 get_parent_ino(inode, &pino)) {
174 fi->i_pino = pino;
175 file_got_pino(inode);
176 up_write(&fi->i_sem);
177
178 mark_inode_dirty_sync(inode);
179 f2fs_write_inode(inode, NULL);
180 } else {
181 up_write(&fi->i_sem);
182 }
183}
184
185int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
186{
187 struct inode *inode = file->f_mapping->host;
188 struct f2fs_inode_info *fi = F2FS_I(inode);
189 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
190 nid_t ino = inode->i_ino;
191 int ret = 0;
192 bool need_cp = false;
193 struct writeback_control wbc = {
194 .sync_mode = WB_SYNC_ALL,
195 .nr_to_write = LONG_MAX,
196 .for_reclaim = 0,
197 };
198
199 if (unlikely(f2fs_readonly(inode->i_sb)))
200 return 0;
201
202 trace_f2fs_sync_file_enter(inode);
203
204 /* if fdatasync is triggered, let's do in-place-update */
205 if (datasync || get_dirty_pages(inode) <= SM_I(sbi)->min_fsync_blocks)
206 set_inode_flag(fi, FI_NEED_IPU);
207 ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
208 clear_inode_flag(fi, FI_NEED_IPU);
209
210 if (ret) {
211 trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret);
212 return ret;
213 }
214
215 /* if the inode is dirty, let's recover all the time */
216 if (!datasync) {
217 f2fs_write_inode(inode, NULL);
218 goto go_write;
219 }
220
221 /*
222 * if there is no written data, don't waste time to write recovery info.
223 */
224 if (!is_inode_flag_set(fi, FI_APPEND_WRITE) &&
225 !exist_written_data(sbi, ino, APPEND_INO)) {
226
227 /* it may call write_inode just prior to fsync */
228 if (need_inode_page_update(sbi, ino))
229 goto go_write;
230
231 if (is_inode_flag_set(fi, FI_UPDATE_WRITE) ||
232 exist_written_data(sbi, ino, UPDATE_INO))
233 goto flush_out;
234 goto out;
235 }
236go_write:
237 /*
238 * Both of fdatasync() and fsync() are able to be recovered from
239 * sudden-power-off.
240 */
241 down_read(&fi->i_sem);
242 need_cp = need_do_checkpoint(inode);
243 up_read(&fi->i_sem);
244
245 if (need_cp) {
246 /* all the dirty node pages should be flushed for POR */
247 ret = f2fs_sync_fs(inode->i_sb, 1);
248
249 /*
250 * We've secured consistency through sync_fs. Following pino
251 * will be used only for fsynced inodes after checkpoint.
252 */
253 try_to_fix_pino(inode);
254 clear_inode_flag(fi, FI_APPEND_WRITE);
255 clear_inode_flag(fi, FI_UPDATE_WRITE);
256 goto out;
257 }
258sync_nodes:
259 sync_node_pages(sbi, ino, &wbc);
260
261 /* if cp_error was enabled, we should avoid infinite loop */
262 if (unlikely(f2fs_cp_error(sbi))) {
263 ret = -EIO;
264 goto out;
265 }
266
267 if (need_inode_block_update(sbi, ino)) {
268 mark_inode_dirty_sync(inode);
269 f2fs_write_inode(inode, NULL);
270 goto sync_nodes;
271 }
272
273 ret = wait_on_node_pages_writeback(sbi, ino);
274 if (ret)
275 goto out;
276
277 /* once recovery info is written, don't need to tack this */
278 remove_ino_entry(sbi, ino, APPEND_INO);
279 clear_inode_flag(fi, FI_APPEND_WRITE);
280flush_out:
281 remove_ino_entry(sbi, ino, UPDATE_INO);
282 clear_inode_flag(fi, FI_UPDATE_WRITE);
283 ret = f2fs_issue_flush(sbi);
284 f2fs_update_time(sbi, REQ_TIME);
285out:
286 trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret);
287 f2fs_trace_ios(NULL, 1);
288 return ret;
289}
290
291static pgoff_t __get_first_dirty_index(struct address_space *mapping,
292 pgoff_t pgofs, int whence)
293{
294 struct pagevec pvec;
295 int nr_pages;
296
297 if (whence != SEEK_DATA)
298 return 0;
299
300 /* find first dirty page index */
301 pagevec_init(&pvec, 0);
302 nr_pages = pagevec_lookup_tag(&pvec, mapping, &pgofs,
303 PAGECACHE_TAG_DIRTY, 1);
304 pgofs = nr_pages ? pvec.pages[0]->index : ULONG_MAX;
305 pagevec_release(&pvec);
306 return pgofs;
307}
308
309static bool __found_offset(block_t blkaddr, pgoff_t dirty, pgoff_t pgofs,
310 int whence)
311{
312 switch (whence) {
313 case SEEK_DATA:
314 if ((blkaddr == NEW_ADDR && dirty == pgofs) ||
315 (blkaddr != NEW_ADDR && blkaddr != NULL_ADDR))
316 return true;
317 break;
318 case SEEK_HOLE:
319 if (blkaddr == NULL_ADDR)
320 return true;
321 break;
322 }
323 return false;
324}
325
326static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence)
327{
328 struct inode *inode = file->f_mapping->host;
329 loff_t maxbytes = inode->i_sb->s_maxbytes;
330 struct dnode_of_data dn;
331 pgoff_t pgofs, end_offset, dirty;
332 loff_t data_ofs = offset;
333 loff_t isize;
334 int err = 0;
335
336 inode_lock(inode);
337
338 isize = i_size_read(inode);
339 if (offset >= isize)
340 goto fail;
341
342 /* handle inline data case */
343 if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode)) {
344 if (whence == SEEK_HOLE)
345 data_ofs = isize;
346 goto found;
347 }
348
349 pgofs = (pgoff_t)(offset >> PAGE_SHIFT);
350
351 dirty = __get_first_dirty_index(inode->i_mapping, pgofs, whence);
352
353 for (; data_ofs < isize; data_ofs = (loff_t)pgofs << PAGE_SHIFT) {
354 set_new_dnode(&dn, inode, NULL, NULL, 0);
355 err = get_dnode_of_data(&dn, pgofs, LOOKUP_NODE_RA);
356 if (err && err != -ENOENT) {
357 goto fail;
358 } else if (err == -ENOENT) {
359 /* direct node does not exists */
360 if (whence == SEEK_DATA) {
361 pgofs = get_next_page_offset(&dn, pgofs);
362 continue;
363 } else {
364 goto found;
365 }
366 }
367
368 end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
369
370 /* find data/hole in dnode block */
371 for (; dn.ofs_in_node < end_offset;
372 dn.ofs_in_node++, pgofs++,
373 data_ofs = (loff_t)pgofs << PAGE_SHIFT) {
374 block_t blkaddr;
375 blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node);
376
377 if (__found_offset(blkaddr, dirty, pgofs, whence)) {
378 f2fs_put_dnode(&dn);
379 goto found;
380 }
381 }
382 f2fs_put_dnode(&dn);
383 }
384
385 if (whence == SEEK_DATA)
386 goto fail;
387found:
388 if (whence == SEEK_HOLE && data_ofs > isize)
389 data_ofs = isize;
390 inode_unlock(inode);
391 return vfs_setpos(file, data_ofs, maxbytes);
392fail:
393 inode_unlock(inode);
394 return -ENXIO;
395}
396
397static loff_t f2fs_llseek(struct file *file, loff_t offset, int whence)
398{
399 struct inode *inode = file->f_mapping->host;
400 loff_t maxbytes = inode->i_sb->s_maxbytes;
401
402 switch (whence) {
403 case SEEK_SET:
404 case SEEK_CUR:
405 case SEEK_END:
406 return generic_file_llseek_size(file, offset, whence,
407 maxbytes, i_size_read(inode));
408 case SEEK_DATA:
409 case SEEK_HOLE:
410 if (offset < 0)
411 return -ENXIO;
412 return f2fs_seek_block(file, offset, whence);
413 }
414
415 return -EINVAL;
416}
417
418static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma)
419{
420 struct inode *inode = file_inode(file);
421 int err;
422
423 if (f2fs_encrypted_inode(inode)) {
424 err = fscrypt_get_encryption_info(inode);
425 if (err)
426 return 0;
427 if (!f2fs_encrypted_inode(inode))
428 return -ENOKEY;
429 }
430
431 /* we don't need to use inline_data strictly */
432 err = f2fs_convert_inline_inode(inode);
433 if (err)
434 return err;
435
436 file_accessed(file);
437 vma->vm_ops = &f2fs_file_vm_ops;
438 return 0;
439}
440
441static int f2fs_file_open(struct inode *inode, struct file *filp)
442{
443 int ret = generic_file_open(inode, filp);
444 struct dentry *dir;
445
446 if (!ret && f2fs_encrypted_inode(inode)) {
447 ret = fscrypt_get_encryption_info(inode);
448 if (ret)
449 return -EACCES;
450 if (!fscrypt_has_encryption_key(inode))
451 return -ENOKEY;
452 }
453 dir = dget_parent(file_dentry(filp));
454 if (f2fs_encrypted_inode(d_inode(dir)) &&
455 !fscrypt_has_permitted_context(d_inode(dir), inode)) {
456 dput(dir);
457 return -EPERM;
458 }
459 dput(dir);
460 return ret;
461}
462
463int truncate_data_blocks_range(struct dnode_of_data *dn, int count)
464{
465 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
466 struct f2fs_node *raw_node;
467 int nr_free = 0, ofs = dn->ofs_in_node, len = count;
468 __le32 *addr;
469
470 raw_node = F2FS_NODE(dn->node_page);
471 addr = blkaddr_in_node(raw_node) + ofs;
472
473 for (; count > 0; count--, addr++, dn->ofs_in_node++) {
474 block_t blkaddr = le32_to_cpu(*addr);
475 if (blkaddr == NULL_ADDR)
476 continue;
477
478 dn->data_blkaddr = NULL_ADDR;
479 set_data_blkaddr(dn);
480 invalidate_blocks(sbi, blkaddr);
481 if (dn->ofs_in_node == 0 && IS_INODE(dn->node_page))
482 clear_inode_flag(F2FS_I(dn->inode),
483 FI_FIRST_BLOCK_WRITTEN);
484 nr_free++;
485 }
486
487 if (nr_free) {
488 pgoff_t fofs;
489 /*
490 * once we invalidate valid blkaddr in range [ofs, ofs + count],
491 * we will invalidate all blkaddr in the whole range.
492 */
493 fofs = start_bidx_of_node(ofs_of_node(dn->node_page),
494 dn->inode) + ofs;
495 f2fs_update_extent_cache_range(dn, fofs, 0, len);
496 dec_valid_block_count(sbi, dn->inode, nr_free);
497 sync_inode_page(dn);
498 }
499 dn->ofs_in_node = ofs;
500
501 f2fs_update_time(sbi, REQ_TIME);
502 trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid,
503 dn->ofs_in_node, nr_free);
504 return nr_free;
505}
506
507void truncate_data_blocks(struct dnode_of_data *dn)
508{
509 truncate_data_blocks_range(dn, ADDRS_PER_BLOCK);
510}
511
512static int truncate_partial_data_page(struct inode *inode, u64 from,
513 bool cache_only)
514{
515 unsigned offset = from & (PAGE_SIZE - 1);
516 pgoff_t index = from >> PAGE_SHIFT;
517 struct address_space *mapping = inode->i_mapping;
518 struct page *page;
519
520 if (!offset && !cache_only)
521 return 0;
522
523 if (cache_only) {
524 page = f2fs_grab_cache_page(mapping, index, false);
525 if (page && PageUptodate(page))
526 goto truncate_out;
527 f2fs_put_page(page, 1);
528 return 0;
529 }
530
531 page = get_lock_data_page(inode, index, true);
532 if (IS_ERR(page))
533 return 0;
534truncate_out:
535 f2fs_wait_on_page_writeback(page, DATA, true);
536 zero_user(page, offset, PAGE_SIZE - offset);
537 if (!cache_only || !f2fs_encrypted_inode(inode) ||
538 !S_ISREG(inode->i_mode))
539 set_page_dirty(page);
540 f2fs_put_page(page, 1);
541 return 0;
542}
543
544int truncate_blocks(struct inode *inode, u64 from, bool lock)
545{
546 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
547 unsigned int blocksize = inode->i_sb->s_blocksize;
548 struct dnode_of_data dn;
549 pgoff_t free_from;
550 int count = 0, err = 0;
551 struct page *ipage;
552 bool truncate_page = false;
553
554 trace_f2fs_truncate_blocks_enter(inode, from);
555
556 free_from = (pgoff_t)F2FS_BYTES_TO_BLK(from + blocksize - 1);
557
558 if (lock)
559 f2fs_lock_op(sbi);
560
561 ipage = get_node_page(sbi, inode->i_ino);
562 if (IS_ERR(ipage)) {
563 err = PTR_ERR(ipage);
564 goto out;
565 }
566
567 if (f2fs_has_inline_data(inode)) {
568 if (truncate_inline_inode(ipage, from))
569 set_page_dirty(ipage);
570 f2fs_put_page(ipage, 1);
571 truncate_page = true;
572 goto out;
573 }
574
575 set_new_dnode(&dn, inode, ipage, NULL, 0);
576 err = get_dnode_of_data(&dn, free_from, LOOKUP_NODE);
577 if (err) {
578 if (err == -ENOENT)
579 goto free_next;
580 goto out;
581 }
582
583 count = ADDRS_PER_PAGE(dn.node_page, inode);
584
585 count -= dn.ofs_in_node;
586 f2fs_bug_on(sbi, count < 0);
587
588 if (dn.ofs_in_node || IS_INODE(dn.node_page)) {
589 truncate_data_blocks_range(&dn, count);
590 free_from += count;
591 }
592
593 f2fs_put_dnode(&dn);
594free_next:
595 err = truncate_inode_blocks(inode, free_from);
596out:
597 if (lock)
598 f2fs_unlock_op(sbi);
599
600 /* lastly zero out the first data page */
601 if (!err)
602 err = truncate_partial_data_page(inode, from, truncate_page);
603
604 trace_f2fs_truncate_blocks_exit(inode, err);
605 return err;
606}
607
608int f2fs_truncate(struct inode *inode, bool lock)
609{
610 int err;
611
612 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
613 S_ISLNK(inode->i_mode)))
614 return 0;
615
616 trace_f2fs_truncate(inode);
617
618 /* we should check inline_data size */
619 if (!f2fs_may_inline_data(inode)) {
620 err = f2fs_convert_inline_inode(inode);
621 if (err)
622 return err;
623 }
624
625 err = truncate_blocks(inode, i_size_read(inode), lock);
626 if (err)
627 return err;
628
629 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
630 mark_inode_dirty(inode);
631 return 0;
632}
633
634int f2fs_getattr(struct vfsmount *mnt,
635 struct dentry *dentry, struct kstat *stat)
636{
637 struct inode *inode = d_inode(dentry);
638 generic_fillattr(inode, stat);
639 stat->blocks <<= 3;
640 return 0;
641}
642
643#ifdef CONFIG_F2FS_FS_POSIX_ACL
644static void __setattr_copy(struct inode *inode, const struct iattr *attr)
645{
646 struct f2fs_inode_info *fi = F2FS_I(inode);
647 unsigned int ia_valid = attr->ia_valid;
648
649 if (ia_valid & ATTR_UID)
650 inode->i_uid = attr->ia_uid;
651 if (ia_valid & ATTR_GID)
652 inode->i_gid = attr->ia_gid;
653 if (ia_valid & ATTR_ATIME)
654 inode->i_atime = timespec_trunc(attr->ia_atime,
655 inode->i_sb->s_time_gran);
656 if (ia_valid & ATTR_MTIME)
657 inode->i_mtime = timespec_trunc(attr->ia_mtime,
658 inode->i_sb->s_time_gran);
659 if (ia_valid & ATTR_CTIME)
660 inode->i_ctime = timespec_trunc(attr->ia_ctime,
661 inode->i_sb->s_time_gran);
662 if (ia_valid & ATTR_MODE) {
663 umode_t mode = attr->ia_mode;
664
665 if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
666 mode &= ~S_ISGID;
667 set_acl_inode(fi, mode);
668 }
669}
670#else
671#define __setattr_copy setattr_copy
672#endif
673
674int f2fs_setattr(struct dentry *dentry, struct iattr *attr)
675{
676 struct inode *inode = d_inode(dentry);
677 struct f2fs_inode_info *fi = F2FS_I(inode);
678 int err;
679
680 err = inode_change_ok(inode, attr);
681 if (err)
682 return err;
683
684 if (attr->ia_valid & ATTR_SIZE) {
685 if (f2fs_encrypted_inode(inode) &&
686 fscrypt_get_encryption_info(inode))
687 return -EACCES;
688
689 if (attr->ia_size <= i_size_read(inode)) {
690 truncate_setsize(inode, attr->ia_size);
691 err = f2fs_truncate(inode, true);
692 if (err)
693 return err;
694 f2fs_balance_fs(F2FS_I_SB(inode), true);
695 } else {
696 /*
697 * do not trim all blocks after i_size if target size is
698 * larger than i_size.
699 */
700 truncate_setsize(inode, attr->ia_size);
701
702 /* should convert inline inode here */
703 if (!f2fs_may_inline_data(inode)) {
704 err = f2fs_convert_inline_inode(inode);
705 if (err)
706 return err;
707 }
708 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
709 }
710 }
711
712 __setattr_copy(inode, attr);
713
714 if (attr->ia_valid & ATTR_MODE) {
715 err = posix_acl_chmod(inode, get_inode_mode(inode));
716 if (err || is_inode_flag_set(fi, FI_ACL_MODE)) {
717 inode->i_mode = fi->i_acl_mode;
718 clear_inode_flag(fi, FI_ACL_MODE);
719 }
720 }
721
722 mark_inode_dirty(inode);
723 return err;
724}
725
726const struct inode_operations f2fs_file_inode_operations = {
727 .getattr = f2fs_getattr,
728 .setattr = f2fs_setattr,
729 .get_acl = f2fs_get_acl,
730 .set_acl = f2fs_set_acl,
731#ifdef CONFIG_F2FS_FS_XATTR
732 .setxattr = generic_setxattr,
733 .getxattr = generic_getxattr,
734 .listxattr = f2fs_listxattr,
735 .removexattr = generic_removexattr,
736#endif
737 .fiemap = f2fs_fiemap,
738};
739
740static int fill_zero(struct inode *inode, pgoff_t index,
741 loff_t start, loff_t len)
742{
743 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
744 struct page *page;
745
746 if (!len)
747 return 0;
748
749 f2fs_balance_fs(sbi, true);
750
751 f2fs_lock_op(sbi);
752 page = get_new_data_page(inode, NULL, index, false);
753 f2fs_unlock_op(sbi);
754
755 if (IS_ERR(page))
756 return PTR_ERR(page);
757
758 f2fs_wait_on_page_writeback(page, DATA, true);
759 zero_user(page, start, len);
760 set_page_dirty(page);
761 f2fs_put_page(page, 1);
762 return 0;
763}
764
765int truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end)
766{
767 int err;
768
769 while (pg_start < pg_end) {
770 struct dnode_of_data dn;
771 pgoff_t end_offset, count;
772
773 set_new_dnode(&dn, inode, NULL, NULL, 0);
774 err = get_dnode_of_data(&dn, pg_start, LOOKUP_NODE);
775 if (err) {
776 if (err == -ENOENT) {
777 pg_start++;
778 continue;
779 }
780 return err;
781 }
782
783 end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
784 count = min(end_offset - dn.ofs_in_node, pg_end - pg_start);
785
786 f2fs_bug_on(F2FS_I_SB(inode), count == 0 || count > end_offset);
787
788 truncate_data_blocks_range(&dn, count);
789 f2fs_put_dnode(&dn);
790
791 pg_start += count;
792 }
793 return 0;
794}
795
796static int punch_hole(struct inode *inode, loff_t offset, loff_t len)
797{
798 pgoff_t pg_start, pg_end;
799 loff_t off_start, off_end;
800 int ret;
801
802 ret = f2fs_convert_inline_inode(inode);
803 if (ret)
804 return ret;
805
806 pg_start = ((unsigned long long) offset) >> PAGE_SHIFT;
807 pg_end = ((unsigned long long) offset + len) >> PAGE_SHIFT;
808
809 off_start = offset & (PAGE_SIZE - 1);
810 off_end = (offset + len) & (PAGE_SIZE - 1);
811
812 if (pg_start == pg_end) {
813 ret = fill_zero(inode, pg_start, off_start,
814 off_end - off_start);
815 if (ret)
816 return ret;
817 } else {
818 if (off_start) {
819 ret = fill_zero(inode, pg_start++, off_start,
820 PAGE_SIZE - off_start);
821 if (ret)
822 return ret;
823 }
824 if (off_end) {
825 ret = fill_zero(inode, pg_end, 0, off_end);
826 if (ret)
827 return ret;
828 }
829
830 if (pg_start < pg_end) {
831 struct address_space *mapping = inode->i_mapping;
832 loff_t blk_start, blk_end;
833 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
834
835 f2fs_balance_fs(sbi, true);
836
837 blk_start = (loff_t)pg_start << PAGE_SHIFT;
838 blk_end = (loff_t)pg_end << PAGE_SHIFT;
839 truncate_inode_pages_range(mapping, blk_start,
840 blk_end - 1);
841
842 f2fs_lock_op(sbi);
843 ret = truncate_hole(inode, pg_start, pg_end);
844 f2fs_unlock_op(sbi);
845 }
846 }
847
848 return ret;
849}
850
851static int __exchange_data_block(struct inode *inode, pgoff_t src,
852 pgoff_t dst, bool full)
853{
854 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
855 struct dnode_of_data dn;
856 block_t new_addr;
857 bool do_replace = false;
858 int ret;
859
860 set_new_dnode(&dn, inode, NULL, NULL, 0);
861 ret = get_dnode_of_data(&dn, src, LOOKUP_NODE_RA);
862 if (ret && ret != -ENOENT) {
863 return ret;
864 } else if (ret == -ENOENT) {
865 new_addr = NULL_ADDR;
866 } else {
867 new_addr = dn.data_blkaddr;
868 if (!is_checkpointed_data(sbi, new_addr)) {
869 /* do not invalidate this block address */
870 f2fs_update_data_blkaddr(&dn, NULL_ADDR);
871 do_replace = true;
872 }
873 f2fs_put_dnode(&dn);
874 }
875
876 if (new_addr == NULL_ADDR)
877 return full ? truncate_hole(inode, dst, dst + 1) : 0;
878
879 if (do_replace) {
880 struct page *ipage = get_node_page(sbi, inode->i_ino);
881 struct node_info ni;
882
883 if (IS_ERR(ipage)) {
884 ret = PTR_ERR(ipage);
885 goto err_out;
886 }
887
888 set_new_dnode(&dn, inode, ipage, NULL, 0);
889 ret = f2fs_reserve_block(&dn, dst);
890 if (ret)
891 goto err_out;
892
893 truncate_data_blocks_range(&dn, 1);
894
895 get_node_info(sbi, dn.nid, &ni);
896 f2fs_replace_block(sbi, &dn, dn.data_blkaddr, new_addr,
897 ni.version, true, false);
898 f2fs_put_dnode(&dn);
899 } else {
900 struct page *psrc, *pdst;
901
902 psrc = get_lock_data_page(inode, src, true);
903 if (IS_ERR(psrc))
904 return PTR_ERR(psrc);
905 pdst = get_new_data_page(inode, NULL, dst, true);
906 if (IS_ERR(pdst)) {
907 f2fs_put_page(psrc, 1);
908 return PTR_ERR(pdst);
909 }
910 f2fs_copy_page(psrc, pdst);
911 set_page_dirty(pdst);
912 f2fs_put_page(pdst, 1);
913 f2fs_put_page(psrc, 1);
914
915 return truncate_hole(inode, src, src + 1);
916 }
917 return 0;
918
919err_out:
920 if (!get_dnode_of_data(&dn, src, LOOKUP_NODE)) {
921 f2fs_update_data_blkaddr(&dn, new_addr);
922 f2fs_put_dnode(&dn);
923 }
924 return ret;
925}
926
927static int f2fs_do_collapse(struct inode *inode, pgoff_t start, pgoff_t end)
928{
929 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
930 pgoff_t nrpages = (i_size_read(inode) + PAGE_SIZE - 1) / PAGE_SIZE;
931 int ret = 0;
932
933 for (; end < nrpages; start++, end++) {
934 f2fs_balance_fs(sbi, true);
935 f2fs_lock_op(sbi);
936 ret = __exchange_data_block(inode, end, start, true);
937 f2fs_unlock_op(sbi);
938 if (ret)
939 break;
940 }
941 return ret;
942}
943
944static int f2fs_collapse_range(struct inode *inode, loff_t offset, loff_t len)
945{
946 pgoff_t pg_start, pg_end;
947 loff_t new_size;
948 int ret;
949
950 if (offset + len >= i_size_read(inode))
951 return -EINVAL;
952
953 /* collapse range should be aligned to block size of f2fs. */
954 if (offset & (F2FS_BLKSIZE - 1) || len & (F2FS_BLKSIZE - 1))
955 return -EINVAL;
956
957 ret = f2fs_convert_inline_inode(inode);
958 if (ret)
959 return ret;
960
961 pg_start = offset >> PAGE_SHIFT;
962 pg_end = (offset + len) >> PAGE_SHIFT;
963
964 /* write out all dirty pages from offset */
965 ret = filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX);
966 if (ret)
967 return ret;
968
969 truncate_pagecache(inode, offset);
970
971 ret = f2fs_do_collapse(inode, pg_start, pg_end);
972 if (ret)
973 return ret;
974
975 /* write out all moved pages, if possible */
976 filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX);
977 truncate_pagecache(inode, offset);
978
979 new_size = i_size_read(inode) - len;
980 truncate_pagecache(inode, new_size);
981
982 ret = truncate_blocks(inode, new_size, true);
983 if (!ret)
984 i_size_write(inode, new_size);
985
986 return ret;
987}
988
989static int f2fs_zero_range(struct inode *inode, loff_t offset, loff_t len,
990 int mode)
991{
992 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
993 struct address_space *mapping = inode->i_mapping;
994 pgoff_t index, pg_start, pg_end;
995 loff_t new_size = i_size_read(inode);
996 loff_t off_start, off_end;
997 int ret = 0;
998
999 ret = inode_newsize_ok(inode, (len + offset));
1000 if (ret)
1001 return ret;
1002
1003 ret = f2fs_convert_inline_inode(inode);
1004 if (ret)
1005 return ret;
1006
1007 ret = filemap_write_and_wait_range(mapping, offset, offset + len - 1);
1008 if (ret)
1009 return ret;
1010
1011 truncate_pagecache_range(inode, offset, offset + len - 1);
1012
1013 pg_start = ((unsigned long long) offset) >> PAGE_SHIFT;
1014 pg_end = ((unsigned long long) offset + len) >> PAGE_SHIFT;
1015
1016 off_start = offset & (PAGE_SIZE - 1);
1017 off_end = (offset + len) & (PAGE_SIZE - 1);
1018
1019 if (pg_start == pg_end) {
1020 ret = fill_zero(inode, pg_start, off_start,
1021 off_end - off_start);
1022 if (ret)
1023 return ret;
1024
1025 if (offset + len > new_size)
1026 new_size = offset + len;
1027 new_size = max_t(loff_t, new_size, offset + len);
1028 } else {
1029 if (off_start) {
1030 ret = fill_zero(inode, pg_start++, off_start,
1031 PAGE_SIZE - off_start);
1032 if (ret)
1033 return ret;
1034
1035 new_size = max_t(loff_t, new_size,
1036 (loff_t)pg_start << PAGE_SHIFT);
1037 }
1038
1039 for (index = pg_start; index < pg_end; index++) {
1040 struct dnode_of_data dn;
1041 struct page *ipage;
1042
1043 f2fs_lock_op(sbi);
1044
1045 ipage = get_node_page(sbi, inode->i_ino);
1046 if (IS_ERR(ipage)) {
1047 ret = PTR_ERR(ipage);
1048 f2fs_unlock_op(sbi);
1049 goto out;
1050 }
1051
1052 set_new_dnode(&dn, inode, ipage, NULL, 0);
1053 ret = f2fs_reserve_block(&dn, index);
1054 if (ret) {
1055 f2fs_unlock_op(sbi);
1056 goto out;
1057 }
1058
1059 if (dn.data_blkaddr != NEW_ADDR) {
1060 invalidate_blocks(sbi, dn.data_blkaddr);
1061 f2fs_update_data_blkaddr(&dn, NEW_ADDR);
1062 }
1063 f2fs_put_dnode(&dn);
1064 f2fs_unlock_op(sbi);
1065
1066 new_size = max_t(loff_t, new_size,
1067 (loff_t)(index + 1) << PAGE_SHIFT);
1068 }
1069
1070 if (off_end) {
1071 ret = fill_zero(inode, pg_end, 0, off_end);
1072 if (ret)
1073 goto out;
1074
1075 new_size = max_t(loff_t, new_size, offset + len);
1076 }
1077 }
1078
1079out:
1080 if (!(mode & FALLOC_FL_KEEP_SIZE) && i_size_read(inode) < new_size) {
1081 i_size_write(inode, new_size);
1082 mark_inode_dirty(inode);
1083 update_inode_page(inode);
1084 }
1085
1086 return ret;
1087}
1088
1089static int f2fs_insert_range(struct inode *inode, loff_t offset, loff_t len)
1090{
1091 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1092 pgoff_t pg_start, pg_end, delta, nrpages, idx;
1093 loff_t new_size;
1094 int ret = 0;
1095
1096 new_size = i_size_read(inode) + len;
1097 if (new_size > inode->i_sb->s_maxbytes)
1098 return -EFBIG;
1099
1100 if (offset >= i_size_read(inode))
1101 return -EINVAL;
1102
1103 /* insert range should be aligned to block size of f2fs. */
1104 if (offset & (F2FS_BLKSIZE - 1) || len & (F2FS_BLKSIZE - 1))
1105 return -EINVAL;
1106
1107 ret = f2fs_convert_inline_inode(inode);
1108 if (ret)
1109 return ret;
1110
1111 f2fs_balance_fs(sbi, true);
1112
1113 ret = truncate_blocks(inode, i_size_read(inode), true);
1114 if (ret)
1115 return ret;
1116
1117 /* write out all dirty pages from offset */
1118 ret = filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX);
1119 if (ret)
1120 return ret;
1121
1122 truncate_pagecache(inode, offset);
1123
1124 pg_start = offset >> PAGE_SHIFT;
1125 pg_end = (offset + len) >> PAGE_SHIFT;
1126 delta = pg_end - pg_start;
1127 nrpages = (i_size_read(inode) + PAGE_SIZE - 1) / PAGE_SIZE;
1128
1129 for (idx = nrpages - 1; idx >= pg_start && idx != -1; idx--) {
1130 f2fs_lock_op(sbi);
1131 ret = __exchange_data_block(inode, idx, idx + delta, false);
1132 f2fs_unlock_op(sbi);
1133 if (ret)
1134 break;
1135 }
1136
1137 /* write out all moved pages, if possible */
1138 filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX);
1139 truncate_pagecache(inode, offset);
1140
1141 if (!ret)
1142 i_size_write(inode, new_size);
1143 return ret;
1144}
1145
1146static int expand_inode_data(struct inode *inode, loff_t offset,
1147 loff_t len, int mode)
1148{
1149 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1150 pgoff_t index, pg_start, pg_end;
1151 loff_t new_size = i_size_read(inode);
1152 loff_t off_start, off_end;
1153 int ret = 0;
1154
1155 ret = inode_newsize_ok(inode, (len + offset));
1156 if (ret)
1157 return ret;
1158
1159 ret = f2fs_convert_inline_inode(inode);
1160 if (ret)
1161 return ret;
1162
1163 f2fs_balance_fs(sbi, true);
1164
1165 pg_start = ((unsigned long long) offset) >> PAGE_SHIFT;
1166 pg_end = ((unsigned long long) offset + len) >> PAGE_SHIFT;
1167
1168 off_start = offset & (PAGE_SIZE - 1);
1169 off_end = (offset + len) & (PAGE_SIZE - 1);
1170
1171 f2fs_lock_op(sbi);
1172
1173 for (index = pg_start; index <= pg_end; index++) {
1174 struct dnode_of_data dn;
1175
1176 if (index == pg_end && !off_end)
1177 goto noalloc;
1178
1179 set_new_dnode(&dn, inode, NULL, NULL, 0);
1180 ret = f2fs_reserve_block(&dn, index);
1181 if (ret)
1182 break;
1183noalloc:
1184 if (pg_start == pg_end)
1185 new_size = offset + len;
1186 else if (index == pg_start && off_start)
1187 new_size = (loff_t)(index + 1) << PAGE_SHIFT;
1188 else if (index == pg_end)
1189 new_size = ((loff_t)index << PAGE_SHIFT) +
1190 off_end;
1191 else
1192 new_size += PAGE_SIZE;
1193 }
1194
1195 if (!(mode & FALLOC_FL_KEEP_SIZE) &&
1196 i_size_read(inode) < new_size) {
1197 i_size_write(inode, new_size);
1198 mark_inode_dirty(inode);
1199 update_inode_page(inode);
1200 }
1201 f2fs_unlock_op(sbi);
1202
1203 return ret;
1204}
1205
1206static long f2fs_fallocate(struct file *file, int mode,
1207 loff_t offset, loff_t len)
1208{
1209 struct inode *inode = file_inode(file);
1210 long ret = 0;
1211
1212 /* f2fs only support ->fallocate for regular file */
1213 if (!S_ISREG(inode->i_mode))
1214 return -EINVAL;
1215
1216 if (f2fs_encrypted_inode(inode) &&
1217 (mode & (FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_INSERT_RANGE)))
1218 return -EOPNOTSUPP;
1219
1220 if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE |
1221 FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_ZERO_RANGE |
1222 FALLOC_FL_INSERT_RANGE))
1223 return -EOPNOTSUPP;
1224
1225 inode_lock(inode);
1226
1227 if (mode & FALLOC_FL_PUNCH_HOLE) {
1228 if (offset >= inode->i_size)
1229 goto out;
1230
1231 ret = punch_hole(inode, offset, len);
1232 } else if (mode & FALLOC_FL_COLLAPSE_RANGE) {
1233 ret = f2fs_collapse_range(inode, offset, len);
1234 } else if (mode & FALLOC_FL_ZERO_RANGE) {
1235 ret = f2fs_zero_range(inode, offset, len, mode);
1236 } else if (mode & FALLOC_FL_INSERT_RANGE) {
1237 ret = f2fs_insert_range(inode, offset, len);
1238 } else {
1239 ret = expand_inode_data(inode, offset, len, mode);
1240 }
1241
1242 if (!ret) {
1243 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
1244 mark_inode_dirty(inode);
1245 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
1246 }
1247
1248out:
1249 inode_unlock(inode);
1250
1251 trace_f2fs_fallocate(inode, mode, offset, len, ret);
1252 return ret;
1253}
1254
1255static int f2fs_release_file(struct inode *inode, struct file *filp)
1256{
1257 /* some remained atomic pages should discarded */
1258 if (f2fs_is_atomic_file(inode))
1259 drop_inmem_pages(inode);
1260 if (f2fs_is_volatile_file(inode)) {
1261 set_inode_flag(F2FS_I(inode), FI_DROP_CACHE);
1262 filemap_fdatawrite(inode->i_mapping);
1263 clear_inode_flag(F2FS_I(inode), FI_DROP_CACHE);
1264 }
1265 return 0;
1266}
1267
1268#define F2FS_REG_FLMASK (~(FS_DIRSYNC_FL | FS_TOPDIR_FL))
1269#define F2FS_OTHER_FLMASK (FS_NODUMP_FL | FS_NOATIME_FL)
1270
1271static inline __u32 f2fs_mask_flags(umode_t mode, __u32 flags)
1272{
1273 if (S_ISDIR(mode))
1274 return flags;
1275 else if (S_ISREG(mode))
1276 return flags & F2FS_REG_FLMASK;
1277 else
1278 return flags & F2FS_OTHER_FLMASK;
1279}
1280
1281static int f2fs_ioc_getflags(struct file *filp, unsigned long arg)
1282{
1283 struct inode *inode = file_inode(filp);
1284 struct f2fs_inode_info *fi = F2FS_I(inode);
1285 unsigned int flags = fi->i_flags & FS_FL_USER_VISIBLE;
1286 return put_user(flags, (int __user *)arg);
1287}
1288
1289static int f2fs_ioc_setflags(struct file *filp, unsigned long arg)
1290{
1291 struct inode *inode = file_inode(filp);
1292 struct f2fs_inode_info *fi = F2FS_I(inode);
1293 unsigned int flags = fi->i_flags & FS_FL_USER_VISIBLE;
1294 unsigned int oldflags;
1295 int ret;
1296
1297 ret = mnt_want_write_file(filp);
1298 if (ret)
1299 return ret;
1300
1301 if (!inode_owner_or_capable(inode)) {
1302 ret = -EACCES;
1303 goto out;
1304 }
1305
1306 if (get_user(flags, (int __user *)arg)) {
1307 ret = -EFAULT;
1308 goto out;
1309 }
1310
1311 flags = f2fs_mask_flags(inode->i_mode, flags);
1312
1313 inode_lock(inode);
1314
1315 oldflags = fi->i_flags;
1316
1317 if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) {
1318 if (!capable(CAP_LINUX_IMMUTABLE)) {
1319 inode_unlock(inode);
1320 ret = -EPERM;
1321 goto out;
1322 }
1323 }
1324
1325 flags = flags & FS_FL_USER_MODIFIABLE;
1326 flags |= oldflags & ~FS_FL_USER_MODIFIABLE;
1327 fi->i_flags = flags;
1328 inode_unlock(inode);
1329
1330 f2fs_set_inode_flags(inode);
1331 inode->i_ctime = CURRENT_TIME;
1332 mark_inode_dirty(inode);
1333out:
1334 mnt_drop_write_file(filp);
1335 return ret;
1336}
1337
1338static int f2fs_ioc_getversion(struct file *filp, unsigned long arg)
1339{
1340 struct inode *inode = file_inode(filp);
1341
1342 return put_user(inode->i_generation, (int __user *)arg);
1343}
1344
1345static int f2fs_ioc_start_atomic_write(struct file *filp)
1346{
1347 struct inode *inode = file_inode(filp);
1348 int ret;
1349
1350 if (!inode_owner_or_capable(inode))
1351 return -EACCES;
1352
1353 if (f2fs_is_atomic_file(inode))
1354 return 0;
1355
1356 ret = f2fs_convert_inline_inode(inode);
1357 if (ret)
1358 return ret;
1359
1360 set_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE);
1361 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
1362
1363 return 0;
1364}
1365
1366static int f2fs_ioc_commit_atomic_write(struct file *filp)
1367{
1368 struct inode *inode = file_inode(filp);
1369 int ret;
1370
1371 if (!inode_owner_or_capable(inode))
1372 return -EACCES;
1373
1374 if (f2fs_is_volatile_file(inode))
1375 return 0;
1376
1377 ret = mnt_want_write_file(filp);
1378 if (ret)
1379 return ret;
1380
1381 if (f2fs_is_atomic_file(inode)) {
1382 clear_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE);
1383 ret = commit_inmem_pages(inode);
1384 if (ret) {
1385 set_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE);
1386 goto err_out;
1387 }
1388 }
1389
1390 ret = f2fs_sync_file(filp, 0, LLONG_MAX, 0);
1391err_out:
1392 mnt_drop_write_file(filp);
1393 return ret;
1394}
1395
1396static int f2fs_ioc_start_volatile_write(struct file *filp)
1397{
1398 struct inode *inode = file_inode(filp);
1399 int ret;
1400
1401 if (!inode_owner_or_capable(inode))
1402 return -EACCES;
1403
1404 if (f2fs_is_volatile_file(inode))
1405 return 0;
1406
1407 ret = f2fs_convert_inline_inode(inode);
1408 if (ret)
1409 return ret;
1410
1411 set_inode_flag(F2FS_I(inode), FI_VOLATILE_FILE);
1412 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
1413 return 0;
1414}
1415
1416static int f2fs_ioc_release_volatile_write(struct file *filp)
1417{
1418 struct inode *inode = file_inode(filp);
1419
1420 if (!inode_owner_or_capable(inode))
1421 return -EACCES;
1422
1423 if (!f2fs_is_volatile_file(inode))
1424 return 0;
1425
1426 if (!f2fs_is_first_block_written(inode))
1427 return truncate_partial_data_page(inode, 0, true);
1428
1429 return punch_hole(inode, 0, F2FS_BLKSIZE);
1430}
1431
1432static int f2fs_ioc_abort_volatile_write(struct file *filp)
1433{
1434 struct inode *inode = file_inode(filp);
1435 int ret;
1436
1437 if (!inode_owner_or_capable(inode))
1438 return -EACCES;
1439
1440 ret = mnt_want_write_file(filp);
1441 if (ret)
1442 return ret;
1443
1444 if (f2fs_is_atomic_file(inode)) {
1445 clear_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE);
1446 drop_inmem_pages(inode);
1447 }
1448 if (f2fs_is_volatile_file(inode)) {
1449 clear_inode_flag(F2FS_I(inode), FI_VOLATILE_FILE);
1450 ret = f2fs_sync_file(filp, 0, LLONG_MAX, 0);
1451 }
1452
1453 mnt_drop_write_file(filp);
1454 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
1455 return ret;
1456}
1457
1458static int f2fs_ioc_shutdown(struct file *filp, unsigned long arg)
1459{
1460 struct inode *inode = file_inode(filp);
1461 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1462 struct super_block *sb = sbi->sb;
1463 __u32 in;
1464
1465 if (!capable(CAP_SYS_ADMIN))
1466 return -EPERM;
1467
1468 if (get_user(in, (__u32 __user *)arg))
1469 return -EFAULT;
1470
1471 switch (in) {
1472 case F2FS_GOING_DOWN_FULLSYNC:
1473 sb = freeze_bdev(sb->s_bdev);
1474 if (sb && !IS_ERR(sb)) {
1475 f2fs_stop_checkpoint(sbi);
1476 thaw_bdev(sb->s_bdev, sb);
1477 }
1478 break;
1479 case F2FS_GOING_DOWN_METASYNC:
1480 /* do checkpoint only */
1481 f2fs_sync_fs(sb, 1);
1482 f2fs_stop_checkpoint(sbi);
1483 break;
1484 case F2FS_GOING_DOWN_NOSYNC:
1485 f2fs_stop_checkpoint(sbi);
1486 break;
1487 case F2FS_GOING_DOWN_METAFLUSH:
1488 sync_meta_pages(sbi, META, LONG_MAX);
1489 f2fs_stop_checkpoint(sbi);
1490 break;
1491 default:
1492 return -EINVAL;
1493 }
1494 f2fs_update_time(sbi, REQ_TIME);
1495 return 0;
1496}
1497
1498static int f2fs_ioc_fitrim(struct file *filp, unsigned long arg)
1499{
1500 struct inode *inode = file_inode(filp);
1501 struct super_block *sb = inode->i_sb;
1502 struct request_queue *q = bdev_get_queue(sb->s_bdev);
1503 struct fstrim_range range;
1504 int ret;
1505
1506 if (!capable(CAP_SYS_ADMIN))
1507 return -EPERM;
1508
1509 if (!blk_queue_discard(q))
1510 return -EOPNOTSUPP;
1511
1512 if (copy_from_user(&range, (struct fstrim_range __user *)arg,
1513 sizeof(range)))
1514 return -EFAULT;
1515
1516 range.minlen = max((unsigned int)range.minlen,
1517 q->limits.discard_granularity);
1518 ret = f2fs_trim_fs(F2FS_SB(sb), &range);
1519 if (ret < 0)
1520 return ret;
1521
1522 if (copy_to_user((struct fstrim_range __user *)arg, &range,
1523 sizeof(range)))
1524 return -EFAULT;
1525 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
1526 return 0;
1527}
1528
1529static bool uuid_is_nonzero(__u8 u[16])
1530{
1531 int i;
1532
1533 for (i = 0; i < 16; i++)
1534 if (u[i])
1535 return true;
1536 return false;
1537}
1538
1539static int f2fs_ioc_set_encryption_policy(struct file *filp, unsigned long arg)
1540{
1541 struct fscrypt_policy policy;
1542 struct inode *inode = file_inode(filp);
1543
1544 if (copy_from_user(&policy, (struct fscrypt_policy __user *)arg,
1545 sizeof(policy)))
1546 return -EFAULT;
1547
1548 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
1549 return fscrypt_process_policy(inode, &policy);
1550}
1551
1552static int f2fs_ioc_get_encryption_policy(struct file *filp, unsigned long arg)
1553{
1554 struct fscrypt_policy policy;
1555 struct inode *inode = file_inode(filp);
1556 int err;
1557
1558 err = fscrypt_get_policy(inode, &policy);
1559 if (err)
1560 return err;
1561
1562 if (copy_to_user((struct fscrypt_policy __user *)arg, &policy, sizeof(policy)))
1563 return -EFAULT;
1564 return 0;
1565}
1566
1567static int f2fs_ioc_get_encryption_pwsalt(struct file *filp, unsigned long arg)
1568{
1569 struct inode *inode = file_inode(filp);
1570 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1571 int err;
1572
1573 if (!f2fs_sb_has_crypto(inode->i_sb))
1574 return -EOPNOTSUPP;
1575
1576 if (uuid_is_nonzero(sbi->raw_super->encrypt_pw_salt))
1577 goto got_it;
1578
1579 err = mnt_want_write_file(filp);
1580 if (err)
1581 return err;
1582
1583 /* update superblock with uuid */
1584 generate_random_uuid(sbi->raw_super->encrypt_pw_salt);
1585
1586 err = f2fs_commit_super(sbi, false);
1587 if (err) {
1588 /* undo new data */
1589 memset(sbi->raw_super->encrypt_pw_salt, 0, 16);
1590 mnt_drop_write_file(filp);
1591 return err;
1592 }
1593 mnt_drop_write_file(filp);
1594got_it:
1595 if (copy_to_user((__u8 __user *)arg, sbi->raw_super->encrypt_pw_salt,
1596 16))
1597 return -EFAULT;
1598 return 0;
1599}
1600
1601static int f2fs_ioc_gc(struct file *filp, unsigned long arg)
1602{
1603 struct inode *inode = file_inode(filp);
1604 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1605 __u32 sync;
1606
1607 if (!capable(CAP_SYS_ADMIN))
1608 return -EPERM;
1609
1610 if (get_user(sync, (__u32 __user *)arg))
1611 return -EFAULT;
1612
1613 if (f2fs_readonly(sbi->sb))
1614 return -EROFS;
1615
1616 if (!sync) {
1617 if (!mutex_trylock(&sbi->gc_mutex))
1618 return -EBUSY;
1619 } else {
1620 mutex_lock(&sbi->gc_mutex);
1621 }
1622
1623 return f2fs_gc(sbi, sync);
1624}
1625
1626static int f2fs_ioc_write_checkpoint(struct file *filp, unsigned long arg)
1627{
1628 struct inode *inode = file_inode(filp);
1629 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1630
1631 if (!capable(CAP_SYS_ADMIN))
1632 return -EPERM;
1633
1634 if (f2fs_readonly(sbi->sb))
1635 return -EROFS;
1636
1637 return f2fs_sync_fs(sbi->sb, 1);
1638}
1639
1640static int f2fs_defragment_range(struct f2fs_sb_info *sbi,
1641 struct file *filp,
1642 struct f2fs_defragment *range)
1643{
1644 struct inode *inode = file_inode(filp);
1645 struct f2fs_map_blocks map = { .m_next_pgofs = NULL };
1646 struct extent_info ei;
1647 pgoff_t pg_start, pg_end;
1648 unsigned int blk_per_seg = sbi->blocks_per_seg;
1649 unsigned int total = 0, sec_num;
1650 unsigned int pages_per_sec = sbi->segs_per_sec * blk_per_seg;
1651 block_t blk_end = 0;
1652 bool fragmented = false;
1653 int err;
1654
1655 /* if in-place-update policy is enabled, don't waste time here */
1656 if (need_inplace_update(inode))
1657 return -EINVAL;
1658
1659 pg_start = range->start >> PAGE_SHIFT;
1660 pg_end = (range->start + range->len) >> PAGE_SHIFT;
1661
1662 f2fs_balance_fs(sbi, true);
1663
1664 inode_lock(inode);
1665
1666 /* writeback all dirty pages in the range */
1667 err = filemap_write_and_wait_range(inode->i_mapping, range->start,
1668 range->start + range->len - 1);
1669 if (err)
1670 goto out;
1671
1672 /*
1673 * lookup mapping info in extent cache, skip defragmenting if physical
1674 * block addresses are continuous.
1675 */
1676 if (f2fs_lookup_extent_cache(inode, pg_start, &ei)) {
1677 if (ei.fofs + ei.len >= pg_end)
1678 goto out;
1679 }
1680
1681 map.m_lblk = pg_start;
1682
1683 /*
1684 * lookup mapping info in dnode page cache, skip defragmenting if all
1685 * physical block addresses are continuous even if there are hole(s)
1686 * in logical blocks.
1687 */
1688 while (map.m_lblk < pg_end) {
1689 map.m_len = pg_end - map.m_lblk;
1690 err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_READ);
1691 if (err)
1692 goto out;
1693
1694 if (!(map.m_flags & F2FS_MAP_FLAGS)) {
1695 map.m_lblk++;
1696 continue;
1697 }
1698
1699 if (blk_end && blk_end != map.m_pblk) {
1700 fragmented = true;
1701 break;
1702 }
1703 blk_end = map.m_pblk + map.m_len;
1704
1705 map.m_lblk += map.m_len;
1706 }
1707
1708 if (!fragmented)
1709 goto out;
1710
1711 map.m_lblk = pg_start;
1712 map.m_len = pg_end - pg_start;
1713
1714 sec_num = (map.m_len + pages_per_sec - 1) / pages_per_sec;
1715
1716 /*
1717 * make sure there are enough free section for LFS allocation, this can
1718 * avoid defragment running in SSR mode when free section are allocated
1719 * intensively
1720 */
1721 if (has_not_enough_free_secs(sbi, sec_num)) {
1722 err = -EAGAIN;
1723 goto out;
1724 }
1725
1726 while (map.m_lblk < pg_end) {
1727 pgoff_t idx;
1728 int cnt = 0;
1729
1730do_map:
1731 map.m_len = pg_end - map.m_lblk;
1732 err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_READ);
1733 if (err)
1734 goto clear_out;
1735
1736 if (!(map.m_flags & F2FS_MAP_FLAGS)) {
1737 map.m_lblk++;
1738 continue;
1739 }
1740
1741 set_inode_flag(F2FS_I(inode), FI_DO_DEFRAG);
1742
1743 idx = map.m_lblk;
1744 while (idx < map.m_lblk + map.m_len && cnt < blk_per_seg) {
1745 struct page *page;
1746
1747 page = get_lock_data_page(inode, idx, true);
1748 if (IS_ERR(page)) {
1749 err = PTR_ERR(page);
1750 goto clear_out;
1751 }
1752
1753 set_page_dirty(page);
1754 f2fs_put_page(page, 1);
1755
1756 idx++;
1757 cnt++;
1758 total++;
1759 }
1760
1761 map.m_lblk = idx;
1762
1763 if (idx < pg_end && cnt < blk_per_seg)
1764 goto do_map;
1765
1766 clear_inode_flag(F2FS_I(inode), FI_DO_DEFRAG);
1767
1768 err = filemap_fdatawrite(inode->i_mapping);
1769 if (err)
1770 goto out;
1771 }
1772clear_out:
1773 clear_inode_flag(F2FS_I(inode), FI_DO_DEFRAG);
1774out:
1775 inode_unlock(inode);
1776 if (!err)
1777 range->len = (u64)total << PAGE_SHIFT;
1778 return err;
1779}
1780
1781static int f2fs_ioc_defragment(struct file *filp, unsigned long arg)
1782{
1783 struct inode *inode = file_inode(filp);
1784 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1785 struct f2fs_defragment range;
1786 int err;
1787
1788 if (!capable(CAP_SYS_ADMIN))
1789 return -EPERM;
1790
1791 if (!S_ISREG(inode->i_mode))
1792 return -EINVAL;
1793
1794 err = mnt_want_write_file(filp);
1795 if (err)
1796 return err;
1797
1798 if (f2fs_readonly(sbi->sb)) {
1799 err = -EROFS;
1800 goto out;
1801 }
1802
1803 if (copy_from_user(&range, (struct f2fs_defragment __user *)arg,
1804 sizeof(range))) {
1805 err = -EFAULT;
1806 goto out;
1807 }
1808
1809 /* verify alignment of offset & size */
1810 if (range.start & (F2FS_BLKSIZE - 1) ||
1811 range.len & (F2FS_BLKSIZE - 1)) {
1812 err = -EINVAL;
1813 goto out;
1814 }
1815
1816 err = f2fs_defragment_range(sbi, filp, &range);
1817 f2fs_update_time(sbi, REQ_TIME);
1818 if (err < 0)
1819 goto out;
1820
1821 if (copy_to_user((struct f2fs_defragment __user *)arg, &range,
1822 sizeof(range)))
1823 err = -EFAULT;
1824out:
1825 mnt_drop_write_file(filp);
1826 return err;
1827}
1828
1829long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1830{
1831 switch (cmd) {
1832 case F2FS_IOC_GETFLAGS:
1833 return f2fs_ioc_getflags(filp, arg);
1834 case F2FS_IOC_SETFLAGS:
1835 return f2fs_ioc_setflags(filp, arg);
1836 case F2FS_IOC_GETVERSION:
1837 return f2fs_ioc_getversion(filp, arg);
1838 case F2FS_IOC_START_ATOMIC_WRITE:
1839 return f2fs_ioc_start_atomic_write(filp);
1840 case F2FS_IOC_COMMIT_ATOMIC_WRITE:
1841 return f2fs_ioc_commit_atomic_write(filp);
1842 case F2FS_IOC_START_VOLATILE_WRITE:
1843 return f2fs_ioc_start_volatile_write(filp);
1844 case F2FS_IOC_RELEASE_VOLATILE_WRITE:
1845 return f2fs_ioc_release_volatile_write(filp);
1846 case F2FS_IOC_ABORT_VOLATILE_WRITE:
1847 return f2fs_ioc_abort_volatile_write(filp);
1848 case F2FS_IOC_SHUTDOWN:
1849 return f2fs_ioc_shutdown(filp, arg);
1850 case FITRIM:
1851 return f2fs_ioc_fitrim(filp, arg);
1852 case F2FS_IOC_SET_ENCRYPTION_POLICY:
1853 return f2fs_ioc_set_encryption_policy(filp, arg);
1854 case F2FS_IOC_GET_ENCRYPTION_POLICY:
1855 return f2fs_ioc_get_encryption_policy(filp, arg);
1856 case F2FS_IOC_GET_ENCRYPTION_PWSALT:
1857 return f2fs_ioc_get_encryption_pwsalt(filp, arg);
1858 case F2FS_IOC_GARBAGE_COLLECT:
1859 return f2fs_ioc_gc(filp, arg);
1860 case F2FS_IOC_WRITE_CHECKPOINT:
1861 return f2fs_ioc_write_checkpoint(filp, arg);
1862 case F2FS_IOC_DEFRAGMENT:
1863 return f2fs_ioc_defragment(filp, arg);
1864 default:
1865 return -ENOTTY;
1866 }
1867}
1868
1869static ssize_t f2fs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
1870{
1871 struct file *file = iocb->ki_filp;
1872 struct inode *inode = file_inode(file);
1873 ssize_t ret;
1874
1875 if (f2fs_encrypted_inode(inode) &&
1876 !fscrypt_has_encryption_key(inode) &&
1877 fscrypt_get_encryption_info(inode))
1878 return -EACCES;
1879
1880 inode_lock(inode);
1881 ret = generic_write_checks(iocb, from);
1882 if (ret > 0) {
1883 ret = f2fs_preallocate_blocks(iocb, from);
1884 if (!ret)
1885 ret = __generic_file_write_iter(iocb, from);
1886 }
1887 inode_unlock(inode);
1888
1889 if (ret > 0) {
1890 ssize_t err;
1891
1892 err = generic_write_sync(file, iocb->ki_pos - ret, ret);
1893 if (err < 0)
1894 ret = err;
1895 }
1896 return ret;
1897}
1898
1899#ifdef CONFIG_COMPAT
1900long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1901{
1902 switch (cmd) {
1903 case F2FS_IOC32_GETFLAGS:
1904 cmd = F2FS_IOC_GETFLAGS;
1905 break;
1906 case F2FS_IOC32_SETFLAGS:
1907 cmd = F2FS_IOC_SETFLAGS;
1908 break;
1909 case F2FS_IOC32_GETVERSION:
1910 cmd = F2FS_IOC_GETVERSION;
1911 break;
1912 case F2FS_IOC_START_ATOMIC_WRITE:
1913 case F2FS_IOC_COMMIT_ATOMIC_WRITE:
1914 case F2FS_IOC_START_VOLATILE_WRITE:
1915 case F2FS_IOC_RELEASE_VOLATILE_WRITE:
1916 case F2FS_IOC_ABORT_VOLATILE_WRITE:
1917 case F2FS_IOC_SHUTDOWN:
1918 case F2FS_IOC_SET_ENCRYPTION_POLICY:
1919 case F2FS_IOC_GET_ENCRYPTION_PWSALT:
1920 case F2FS_IOC_GET_ENCRYPTION_POLICY:
1921 case F2FS_IOC_GARBAGE_COLLECT:
1922 case F2FS_IOC_WRITE_CHECKPOINT:
1923 case F2FS_IOC_DEFRAGMENT:
1924 break;
1925 default:
1926 return -ENOIOCTLCMD;
1927 }
1928 return f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
1929}
1930#endif
1931
1932const struct file_operations f2fs_file_operations = {
1933 .llseek = f2fs_llseek,
1934 .read_iter = generic_file_read_iter,
1935 .write_iter = f2fs_file_write_iter,
1936 .open = f2fs_file_open,
1937 .release = f2fs_release_file,
1938 .mmap = f2fs_file_mmap,
1939 .fsync = f2fs_sync_file,
1940 .fallocate = f2fs_fallocate,
1941 .unlocked_ioctl = f2fs_ioctl,
1942#ifdef CONFIG_COMPAT
1943 .compat_ioctl = f2fs_compat_ioctl,
1944#endif
1945 .splice_read = generic_file_splice_read,
1946 .splice_write = iter_file_splice_write,
1947};
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/fs.h>
9#include <linux/f2fs_fs.h>
10#include <linux/stat.h>
11#include <linux/buffer_head.h>
12#include <linux/writeback.h>
13#include <linux/blkdev.h>
14#include <linux/falloc.h>
15#include <linux/types.h>
16#include <linux/compat.h>
17#include <linux/uaccess.h>
18#include <linux/mount.h>
19#include <linux/pagevec.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
39static vm_fault_t f2fs_filemap_fault(struct vm_fault *vmf)
40{
41 struct inode *inode = file_inode(vmf->vma->vm_file);
42 vm_fault_t ret;
43
44 ret = filemap_fault(vmf);
45 if (!ret)
46 f2fs_update_iostat(F2FS_I_SB(inode), inode,
47 APP_MAPPED_READ_IO, F2FS_BLKSIZE);
48
49 trace_f2fs_filemap_fault(inode, vmf->pgoff, (unsigned long)ret);
50
51 return ret;
52}
53
54static vm_fault_t f2fs_vm_page_mkwrite(struct vm_fault *vmf)
55{
56 struct page *page = vmf->page;
57 struct inode *inode = file_inode(vmf->vma->vm_file);
58 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
59 struct dnode_of_data dn;
60 bool need_alloc = true;
61 int err = 0;
62
63 if (unlikely(IS_IMMUTABLE(inode)))
64 return VM_FAULT_SIGBUS;
65
66 if (is_inode_flag_set(inode, FI_COMPRESS_RELEASED))
67 return VM_FAULT_SIGBUS;
68
69 if (unlikely(f2fs_cp_error(sbi))) {
70 err = -EIO;
71 goto err;
72 }
73
74 if (!f2fs_is_checkpoint_ready(sbi)) {
75 err = -ENOSPC;
76 goto err;
77 }
78
79 err = f2fs_convert_inline_inode(inode);
80 if (err)
81 goto err;
82
83#ifdef CONFIG_F2FS_FS_COMPRESSION
84 if (f2fs_compressed_file(inode)) {
85 int ret = f2fs_is_compressed_cluster(inode, page->index);
86
87 if (ret < 0) {
88 err = ret;
89 goto err;
90 } else if (ret) {
91 need_alloc = false;
92 }
93 }
94#endif
95 /* should do out of any locked page */
96 if (need_alloc)
97 f2fs_balance_fs(sbi, true);
98
99 sb_start_pagefault(inode->i_sb);
100
101 f2fs_bug_on(sbi, f2fs_has_inline_data(inode));
102
103 file_update_time(vmf->vma->vm_file);
104 filemap_invalidate_lock_shared(inode->i_mapping);
105 lock_page(page);
106 if (unlikely(page->mapping != inode->i_mapping ||
107 page_offset(page) > i_size_read(inode) ||
108 !PageUptodate(page))) {
109 unlock_page(page);
110 err = -EFAULT;
111 goto out_sem;
112 }
113
114 if (need_alloc) {
115 /* block allocation */
116 f2fs_do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO, true);
117 set_new_dnode(&dn, inode, NULL, NULL, 0);
118 err = f2fs_get_block(&dn, page->index);
119 f2fs_do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO, false);
120 }
121
122#ifdef CONFIG_F2FS_FS_COMPRESSION
123 if (!need_alloc) {
124 set_new_dnode(&dn, inode, NULL, NULL, 0);
125 err = f2fs_get_dnode_of_data(&dn, page->index, LOOKUP_NODE);
126 f2fs_put_dnode(&dn);
127 }
128#endif
129 if (err) {
130 unlock_page(page);
131 goto out_sem;
132 }
133
134 f2fs_wait_on_page_writeback(page, DATA, false, true);
135
136 /* wait for GCed page writeback via META_MAPPING */
137 f2fs_wait_on_block_writeback(inode, dn.data_blkaddr);
138
139 /*
140 * check to see if the page is mapped already (no holes)
141 */
142 if (PageMappedToDisk(page))
143 goto out_sem;
144
145 /* page is wholly or partially inside EOF */
146 if (((loff_t)(page->index + 1) << PAGE_SHIFT) >
147 i_size_read(inode)) {
148 loff_t offset;
149
150 offset = i_size_read(inode) & ~PAGE_MASK;
151 zero_user_segment(page, offset, PAGE_SIZE);
152 }
153 set_page_dirty(page);
154 if (!PageUptodate(page))
155 SetPageUptodate(page);
156
157 f2fs_update_iostat(sbi, inode, APP_MAPPED_IO, F2FS_BLKSIZE);
158 f2fs_update_time(sbi, REQ_TIME);
159
160 trace_f2fs_vm_page_mkwrite(page, DATA);
161out_sem:
162 filemap_invalidate_unlock_shared(inode->i_mapping);
163
164 sb_end_pagefault(inode->i_sb);
165err:
166 return block_page_mkwrite_return(err);
167}
168
169static const struct vm_operations_struct f2fs_file_vm_ops = {
170 .fault = f2fs_filemap_fault,
171 .map_pages = filemap_map_pages,
172 .page_mkwrite = f2fs_vm_page_mkwrite,
173};
174
175static int get_parent_ino(struct inode *inode, nid_t *pino)
176{
177 struct dentry *dentry;
178
179 /*
180 * Make sure to get the non-deleted alias. The alias associated with
181 * the open file descriptor being fsync()'ed may be deleted already.
182 */
183 dentry = d_find_alias(inode);
184 if (!dentry)
185 return 0;
186
187 *pino = parent_ino(dentry);
188 dput(dentry);
189 return 1;
190}
191
192static inline enum cp_reason_type need_do_checkpoint(struct inode *inode)
193{
194 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
195 enum cp_reason_type cp_reason = CP_NO_NEEDED;
196
197 if (!S_ISREG(inode->i_mode))
198 cp_reason = CP_NON_REGULAR;
199 else if (f2fs_compressed_file(inode))
200 cp_reason = CP_COMPRESSED;
201 else if (inode->i_nlink != 1)
202 cp_reason = CP_HARDLINK;
203 else if (is_sbi_flag_set(sbi, SBI_NEED_CP))
204 cp_reason = CP_SB_NEED_CP;
205 else if (file_wrong_pino(inode))
206 cp_reason = CP_WRONG_PINO;
207 else if (!f2fs_space_for_roll_forward(sbi))
208 cp_reason = CP_NO_SPC_ROLL;
209 else if (!f2fs_is_checkpointed_node(sbi, F2FS_I(inode)->i_pino))
210 cp_reason = CP_NODE_NEED_CP;
211 else if (test_opt(sbi, FASTBOOT))
212 cp_reason = CP_FASTBOOT_MODE;
213 else if (F2FS_OPTION(sbi).active_logs == 2)
214 cp_reason = CP_SPEC_LOG_NUM;
215 else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT &&
216 f2fs_need_dentry_mark(sbi, inode->i_ino) &&
217 f2fs_exist_written_data(sbi, F2FS_I(inode)->i_pino,
218 TRANS_DIR_INO))
219 cp_reason = CP_RECOVER_DIR;
220
221 return cp_reason;
222}
223
224static bool need_inode_page_update(struct f2fs_sb_info *sbi, nid_t ino)
225{
226 struct page *i = find_get_page(NODE_MAPPING(sbi), ino);
227 bool ret = false;
228 /* But we need to avoid that there are some inode updates */
229 if ((i && PageDirty(i)) || f2fs_need_inode_block_update(sbi, ino))
230 ret = true;
231 f2fs_put_page(i, 0);
232 return ret;
233}
234
235static void try_to_fix_pino(struct inode *inode)
236{
237 struct f2fs_inode_info *fi = F2FS_I(inode);
238 nid_t pino;
239
240 f2fs_down_write(&fi->i_sem);
241 if (file_wrong_pino(inode) && inode->i_nlink == 1 &&
242 get_parent_ino(inode, &pino)) {
243 f2fs_i_pino_write(inode, pino);
244 file_got_pino(inode);
245 }
246 f2fs_up_write(&fi->i_sem);
247}
248
249static int f2fs_do_sync_file(struct file *file, loff_t start, loff_t end,
250 int datasync, bool atomic)
251{
252 struct inode *inode = file->f_mapping->host;
253 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
254 nid_t ino = inode->i_ino;
255 int ret = 0;
256 enum cp_reason_type cp_reason = 0;
257 struct writeback_control wbc = {
258 .sync_mode = WB_SYNC_ALL,
259 .nr_to_write = LONG_MAX,
260 .for_reclaim = 0,
261 };
262 unsigned int seq_id = 0;
263
264 if (unlikely(f2fs_readonly(inode->i_sb)))
265 return 0;
266
267 trace_f2fs_sync_file_enter(inode);
268
269 if (S_ISDIR(inode->i_mode))
270 goto go_write;
271
272 /* if fdatasync is triggered, let's do in-place-update */
273 if (datasync || get_dirty_pages(inode) <= SM_I(sbi)->min_fsync_blocks)
274 set_inode_flag(inode, FI_NEED_IPU);
275 ret = file_write_and_wait_range(file, start, end);
276 clear_inode_flag(inode, FI_NEED_IPU);
277
278 if (ret || is_sbi_flag_set(sbi, SBI_CP_DISABLED)) {
279 trace_f2fs_sync_file_exit(inode, cp_reason, datasync, ret);
280 return ret;
281 }
282
283 /* if the inode is dirty, let's recover all the time */
284 if (!f2fs_skip_inode_update(inode, datasync)) {
285 f2fs_write_inode(inode, NULL);
286 goto go_write;
287 }
288
289 /*
290 * if there is no written data, don't waste time to write recovery info.
291 */
292 if (!is_inode_flag_set(inode, FI_APPEND_WRITE) &&
293 !f2fs_exist_written_data(sbi, ino, APPEND_INO)) {
294
295 /* it may call write_inode just prior to fsync */
296 if (need_inode_page_update(sbi, ino))
297 goto go_write;
298
299 if (is_inode_flag_set(inode, FI_UPDATE_WRITE) ||
300 f2fs_exist_written_data(sbi, ino, UPDATE_INO))
301 goto flush_out;
302 goto out;
303 } else {
304 /*
305 * for OPU case, during fsync(), node can be persisted before
306 * data when lower device doesn't support write barrier, result
307 * in data corruption after SPO.
308 * So for strict fsync mode, force to use atomic write sematics
309 * to keep write order in between data/node and last node to
310 * avoid potential data corruption.
311 */
312 if (F2FS_OPTION(sbi).fsync_mode ==
313 FSYNC_MODE_STRICT && !atomic)
314 atomic = true;
315 }
316go_write:
317 /*
318 * Both of fdatasync() and fsync() are able to be recovered from
319 * sudden-power-off.
320 */
321 f2fs_down_read(&F2FS_I(inode)->i_sem);
322 cp_reason = need_do_checkpoint(inode);
323 f2fs_up_read(&F2FS_I(inode)->i_sem);
324
325 if (cp_reason) {
326 /* all the dirty node pages should be flushed for POR */
327 ret = f2fs_sync_fs(inode->i_sb, 1);
328
329 /*
330 * We've secured consistency through sync_fs. Following pino
331 * will be used only for fsynced inodes after checkpoint.
332 */
333 try_to_fix_pino(inode);
334 clear_inode_flag(inode, FI_APPEND_WRITE);
335 clear_inode_flag(inode, FI_UPDATE_WRITE);
336 goto out;
337 }
338sync_nodes:
339 atomic_inc(&sbi->wb_sync_req[NODE]);
340 ret = f2fs_fsync_node_pages(sbi, inode, &wbc, atomic, &seq_id);
341 atomic_dec(&sbi->wb_sync_req[NODE]);
342 if (ret)
343 goto out;
344
345 /* if cp_error was enabled, we should avoid infinite loop */
346 if (unlikely(f2fs_cp_error(sbi))) {
347 ret = -EIO;
348 goto out;
349 }
350
351 if (f2fs_need_inode_block_update(sbi, ino)) {
352 f2fs_mark_inode_dirty_sync(inode, true);
353 f2fs_write_inode(inode, NULL);
354 goto sync_nodes;
355 }
356
357 /*
358 * If it's atomic_write, it's just fine to keep write ordering. So
359 * here we don't need to wait for node write completion, since we use
360 * node chain which serializes node blocks. If one of node writes are
361 * reordered, we can see simply broken chain, resulting in stopping
362 * roll-forward recovery. It means we'll recover all or none node blocks
363 * given fsync mark.
364 */
365 if (!atomic) {
366 ret = f2fs_wait_on_node_pages_writeback(sbi, seq_id);
367 if (ret)
368 goto out;
369 }
370
371 /* once recovery info is written, don't need to tack this */
372 f2fs_remove_ino_entry(sbi, ino, APPEND_INO);
373 clear_inode_flag(inode, FI_APPEND_WRITE);
374flush_out:
375 if ((!atomic && F2FS_OPTION(sbi).fsync_mode != FSYNC_MODE_NOBARRIER) ||
376 (atomic && !test_opt(sbi, NOBARRIER) && f2fs_sb_has_blkzoned(sbi)))
377 ret = f2fs_issue_flush(sbi, inode->i_ino);
378 if (!ret) {
379 f2fs_remove_ino_entry(sbi, ino, UPDATE_INO);
380 clear_inode_flag(inode, FI_UPDATE_WRITE);
381 f2fs_remove_ino_entry(sbi, ino, FLUSH_INO);
382 }
383 f2fs_update_time(sbi, REQ_TIME);
384out:
385 trace_f2fs_sync_file_exit(inode, cp_reason, datasync, ret);
386 return ret;
387}
388
389int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
390{
391 if (unlikely(f2fs_cp_error(F2FS_I_SB(file_inode(file)))))
392 return -EIO;
393 return f2fs_do_sync_file(file, start, end, datasync, false);
394}
395
396static bool __found_offset(struct address_space *mapping, block_t blkaddr,
397 pgoff_t index, int whence)
398{
399 switch (whence) {
400 case SEEK_DATA:
401 if (__is_valid_data_blkaddr(blkaddr))
402 return true;
403 if (blkaddr == NEW_ADDR &&
404 xa_get_mark(&mapping->i_pages, index, PAGECACHE_TAG_DIRTY))
405 return true;
406 break;
407 case SEEK_HOLE:
408 if (blkaddr == NULL_ADDR)
409 return true;
410 break;
411 }
412 return false;
413}
414
415static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence)
416{
417 struct inode *inode = file->f_mapping->host;
418 loff_t maxbytes = inode->i_sb->s_maxbytes;
419 struct dnode_of_data dn;
420 pgoff_t pgofs, end_offset;
421 loff_t data_ofs = offset;
422 loff_t isize;
423 int err = 0;
424
425 inode_lock(inode);
426
427 isize = i_size_read(inode);
428 if (offset >= isize)
429 goto fail;
430
431 /* handle inline data case */
432 if (f2fs_has_inline_data(inode)) {
433 if (whence == SEEK_HOLE) {
434 data_ofs = isize;
435 goto found;
436 } else if (whence == SEEK_DATA) {
437 data_ofs = offset;
438 goto found;
439 }
440 }
441
442 pgofs = (pgoff_t)(offset >> PAGE_SHIFT);
443
444 for (; data_ofs < isize; data_ofs = (loff_t)pgofs << PAGE_SHIFT) {
445 set_new_dnode(&dn, inode, NULL, NULL, 0);
446 err = f2fs_get_dnode_of_data(&dn, pgofs, LOOKUP_NODE);
447 if (err && err != -ENOENT) {
448 goto fail;
449 } else if (err == -ENOENT) {
450 /* direct node does not exists */
451 if (whence == SEEK_DATA) {
452 pgofs = f2fs_get_next_page_offset(&dn, pgofs);
453 continue;
454 } else {
455 goto found;
456 }
457 }
458
459 end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
460
461 /* find data/hole in dnode block */
462 for (; dn.ofs_in_node < end_offset;
463 dn.ofs_in_node++, pgofs++,
464 data_ofs = (loff_t)pgofs << PAGE_SHIFT) {
465 block_t blkaddr;
466
467 blkaddr = f2fs_data_blkaddr(&dn);
468
469 if (__is_valid_data_blkaddr(blkaddr) &&
470 !f2fs_is_valid_blkaddr(F2FS_I_SB(inode),
471 blkaddr, DATA_GENERIC_ENHANCE)) {
472 f2fs_put_dnode(&dn);
473 goto fail;
474 }
475
476 if (__found_offset(file->f_mapping, blkaddr,
477 pgofs, whence)) {
478 f2fs_put_dnode(&dn);
479 goto found;
480 }
481 }
482 f2fs_put_dnode(&dn);
483 }
484
485 if (whence == SEEK_DATA)
486 goto fail;
487found:
488 if (whence == SEEK_HOLE && data_ofs > isize)
489 data_ofs = isize;
490 inode_unlock(inode);
491 return vfs_setpos(file, data_ofs, maxbytes);
492fail:
493 inode_unlock(inode);
494 return -ENXIO;
495}
496
497static loff_t f2fs_llseek(struct file *file, loff_t offset, int whence)
498{
499 struct inode *inode = file->f_mapping->host;
500 loff_t maxbytes = inode->i_sb->s_maxbytes;
501
502 if (f2fs_compressed_file(inode))
503 maxbytes = max_file_blocks(inode) << F2FS_BLKSIZE_BITS;
504
505 switch (whence) {
506 case SEEK_SET:
507 case SEEK_CUR:
508 case SEEK_END:
509 return generic_file_llseek_size(file, offset, whence,
510 maxbytes, i_size_read(inode));
511 case SEEK_DATA:
512 case SEEK_HOLE:
513 if (offset < 0)
514 return -ENXIO;
515 return f2fs_seek_block(file, offset, whence);
516 }
517
518 return -EINVAL;
519}
520
521static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma)
522{
523 struct inode *inode = file_inode(file);
524
525 if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
526 return -EIO;
527
528 if (!f2fs_is_compress_backend_ready(inode))
529 return -EOPNOTSUPP;
530
531 file_accessed(file);
532 vma->vm_ops = &f2fs_file_vm_ops;
533 set_inode_flag(inode, FI_MMAP_FILE);
534 return 0;
535}
536
537static int f2fs_file_open(struct inode *inode, struct file *filp)
538{
539 int err = fscrypt_file_open(inode, filp);
540
541 if (err)
542 return err;
543
544 if (!f2fs_is_compress_backend_ready(inode))
545 return -EOPNOTSUPP;
546
547 err = fsverity_file_open(inode, filp);
548 if (err)
549 return err;
550
551 filp->f_mode |= FMODE_NOWAIT;
552
553 return dquot_file_open(inode, filp);
554}
555
556void f2fs_truncate_data_blocks_range(struct dnode_of_data *dn, int count)
557{
558 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
559 struct f2fs_node *raw_node;
560 int nr_free = 0, ofs = dn->ofs_in_node, len = count;
561 __le32 *addr;
562 int base = 0;
563 bool compressed_cluster = false;
564 int cluster_index = 0, valid_blocks = 0;
565 int cluster_size = F2FS_I(dn->inode)->i_cluster_size;
566 bool released = !atomic_read(&F2FS_I(dn->inode)->i_compr_blocks);
567
568 if (IS_INODE(dn->node_page) && f2fs_has_extra_attr(dn->inode))
569 base = get_extra_isize(dn->inode);
570
571 raw_node = F2FS_NODE(dn->node_page);
572 addr = blkaddr_in_node(raw_node) + base + ofs;
573
574 /* Assumption: truncation starts with cluster */
575 for (; count > 0; count--, addr++, dn->ofs_in_node++, cluster_index++) {
576 block_t blkaddr = le32_to_cpu(*addr);
577
578 if (f2fs_compressed_file(dn->inode) &&
579 !(cluster_index & (cluster_size - 1))) {
580 if (compressed_cluster)
581 f2fs_i_compr_blocks_update(dn->inode,
582 valid_blocks, false);
583 compressed_cluster = (blkaddr == COMPRESS_ADDR);
584 valid_blocks = 0;
585 }
586
587 if (blkaddr == NULL_ADDR)
588 continue;
589
590 dn->data_blkaddr = NULL_ADDR;
591 f2fs_set_data_blkaddr(dn);
592
593 if (__is_valid_data_blkaddr(blkaddr)) {
594 if (!f2fs_is_valid_blkaddr(sbi, blkaddr,
595 DATA_GENERIC_ENHANCE))
596 continue;
597 if (compressed_cluster)
598 valid_blocks++;
599 }
600
601 if (dn->ofs_in_node == 0 && IS_INODE(dn->node_page))
602 clear_inode_flag(dn->inode, FI_FIRST_BLOCK_WRITTEN);
603
604 f2fs_invalidate_blocks(sbi, blkaddr);
605
606 if (!released || blkaddr != COMPRESS_ADDR)
607 nr_free++;
608 }
609
610 if (compressed_cluster)
611 f2fs_i_compr_blocks_update(dn->inode, valid_blocks, false);
612
613 if (nr_free) {
614 pgoff_t fofs;
615 /*
616 * once we invalidate valid blkaddr in range [ofs, ofs + count],
617 * we will invalidate all blkaddr in the whole range.
618 */
619 fofs = f2fs_start_bidx_of_node(ofs_of_node(dn->node_page),
620 dn->inode) + ofs;
621 f2fs_update_read_extent_cache_range(dn, fofs, 0, len);
622 f2fs_update_age_extent_cache_range(dn, fofs, nr_free);
623 dec_valid_block_count(sbi, dn->inode, nr_free);
624 }
625 dn->ofs_in_node = ofs;
626
627 f2fs_update_time(sbi, REQ_TIME);
628 trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid,
629 dn->ofs_in_node, nr_free);
630}
631
632void f2fs_truncate_data_blocks(struct dnode_of_data *dn)
633{
634 f2fs_truncate_data_blocks_range(dn, ADDRS_PER_BLOCK(dn->inode));
635}
636
637static int truncate_partial_data_page(struct inode *inode, u64 from,
638 bool cache_only)
639{
640 loff_t offset = from & (PAGE_SIZE - 1);
641 pgoff_t index = from >> PAGE_SHIFT;
642 struct address_space *mapping = inode->i_mapping;
643 struct page *page;
644
645 if (!offset && !cache_only)
646 return 0;
647
648 if (cache_only) {
649 page = find_lock_page(mapping, index);
650 if (page && PageUptodate(page))
651 goto truncate_out;
652 f2fs_put_page(page, 1);
653 return 0;
654 }
655
656 page = f2fs_get_lock_data_page(inode, index, true);
657 if (IS_ERR(page))
658 return PTR_ERR(page) == -ENOENT ? 0 : PTR_ERR(page);
659truncate_out:
660 f2fs_wait_on_page_writeback(page, DATA, true, true);
661 zero_user(page, offset, PAGE_SIZE - offset);
662
663 /* An encrypted inode should have a key and truncate the last page. */
664 f2fs_bug_on(F2FS_I_SB(inode), cache_only && IS_ENCRYPTED(inode));
665 if (!cache_only)
666 set_page_dirty(page);
667 f2fs_put_page(page, 1);
668 return 0;
669}
670
671int f2fs_do_truncate_blocks(struct inode *inode, u64 from, bool lock)
672{
673 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
674 struct dnode_of_data dn;
675 pgoff_t free_from;
676 int count = 0, err = 0;
677 struct page *ipage;
678 bool truncate_page = false;
679
680 trace_f2fs_truncate_blocks_enter(inode, from);
681
682 free_from = (pgoff_t)F2FS_BLK_ALIGN(from);
683
684 if (free_from >= max_file_blocks(inode))
685 goto free_partial;
686
687 if (lock)
688 f2fs_lock_op(sbi);
689
690 ipage = f2fs_get_node_page(sbi, inode->i_ino);
691 if (IS_ERR(ipage)) {
692 err = PTR_ERR(ipage);
693 goto out;
694 }
695
696 if (f2fs_has_inline_data(inode)) {
697 f2fs_truncate_inline_inode(inode, ipage, from);
698 f2fs_put_page(ipage, 1);
699 truncate_page = true;
700 goto out;
701 }
702
703 set_new_dnode(&dn, inode, ipage, NULL, 0);
704 err = f2fs_get_dnode_of_data(&dn, free_from, LOOKUP_NODE_RA);
705 if (err) {
706 if (err == -ENOENT)
707 goto free_next;
708 goto out;
709 }
710
711 count = ADDRS_PER_PAGE(dn.node_page, inode);
712
713 count -= dn.ofs_in_node;
714 f2fs_bug_on(sbi, count < 0);
715
716 if (dn.ofs_in_node || IS_INODE(dn.node_page)) {
717 f2fs_truncate_data_blocks_range(&dn, count);
718 free_from += count;
719 }
720
721 f2fs_put_dnode(&dn);
722free_next:
723 err = f2fs_truncate_inode_blocks(inode, free_from);
724out:
725 if (lock)
726 f2fs_unlock_op(sbi);
727free_partial:
728 /* lastly zero out the first data page */
729 if (!err)
730 err = truncate_partial_data_page(inode, from, truncate_page);
731
732 trace_f2fs_truncate_blocks_exit(inode, err);
733 return err;
734}
735
736int f2fs_truncate_blocks(struct inode *inode, u64 from, bool lock)
737{
738 u64 free_from = from;
739 int err;
740
741#ifdef CONFIG_F2FS_FS_COMPRESSION
742 /*
743 * for compressed file, only support cluster size
744 * aligned truncation.
745 */
746 if (f2fs_compressed_file(inode))
747 free_from = round_up(from,
748 F2FS_I(inode)->i_cluster_size << PAGE_SHIFT);
749#endif
750
751 err = f2fs_do_truncate_blocks(inode, free_from, lock);
752 if (err)
753 return err;
754
755#ifdef CONFIG_F2FS_FS_COMPRESSION
756 /*
757 * For compressed file, after release compress blocks, don't allow write
758 * direct, but we should allow write direct after truncate to zero.
759 */
760 if (f2fs_compressed_file(inode) && !free_from
761 && is_inode_flag_set(inode, FI_COMPRESS_RELEASED))
762 clear_inode_flag(inode, FI_COMPRESS_RELEASED);
763
764 if (from != free_from) {
765 err = f2fs_truncate_partial_cluster(inode, from, lock);
766 if (err)
767 return err;
768 }
769#endif
770
771 return 0;
772}
773
774int f2fs_truncate(struct inode *inode)
775{
776 int err;
777
778 if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
779 return -EIO;
780
781 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
782 S_ISLNK(inode->i_mode)))
783 return 0;
784
785 trace_f2fs_truncate(inode);
786
787 if (time_to_inject(F2FS_I_SB(inode), FAULT_TRUNCATE)) {
788 f2fs_show_injection_info(F2FS_I_SB(inode), FAULT_TRUNCATE);
789 return -EIO;
790 }
791
792 err = f2fs_dquot_initialize(inode);
793 if (err)
794 return err;
795
796 /* we should check inline_data size */
797 if (!f2fs_may_inline_data(inode)) {
798 err = f2fs_convert_inline_inode(inode);
799 if (err)
800 return err;
801 }
802
803 err = f2fs_truncate_blocks(inode, i_size_read(inode), true);
804 if (err)
805 return err;
806
807 inode->i_mtime = inode->i_ctime = current_time(inode);
808 f2fs_mark_inode_dirty_sync(inode, false);
809 return 0;
810}
811
812static bool f2fs_force_buffered_io(struct inode *inode, int rw)
813{
814 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
815
816 if (!fscrypt_dio_supported(inode))
817 return true;
818 if (fsverity_active(inode))
819 return true;
820 if (f2fs_compressed_file(inode))
821 return true;
822
823 /* disallow direct IO if any of devices has unaligned blksize */
824 if (f2fs_is_multi_device(sbi) && !sbi->aligned_blksize)
825 return true;
826 /*
827 * for blkzoned device, fallback direct IO to buffered IO, so
828 * all IOs can be serialized by log-structured write.
829 */
830 if (f2fs_sb_has_blkzoned(sbi) && (rw == WRITE))
831 return true;
832 if (f2fs_lfs_mode(sbi) && rw == WRITE && F2FS_IO_ALIGNED(sbi))
833 return true;
834 if (is_sbi_flag_set(sbi, SBI_CP_DISABLED))
835 return true;
836
837 return false;
838}
839
840int f2fs_getattr(struct user_namespace *mnt_userns, const struct path *path,
841 struct kstat *stat, u32 request_mask, unsigned int query_flags)
842{
843 struct inode *inode = d_inode(path->dentry);
844 struct f2fs_inode_info *fi = F2FS_I(inode);
845 struct f2fs_inode *ri = NULL;
846 unsigned int flags;
847
848 if (f2fs_has_extra_attr(inode) &&
849 f2fs_sb_has_inode_crtime(F2FS_I_SB(inode)) &&
850 F2FS_FITS_IN_INODE(ri, fi->i_extra_isize, i_crtime)) {
851 stat->result_mask |= STATX_BTIME;
852 stat->btime.tv_sec = fi->i_crtime.tv_sec;
853 stat->btime.tv_nsec = fi->i_crtime.tv_nsec;
854 }
855
856 /*
857 * Return the DIO alignment restrictions if requested. We only return
858 * this information when requested, since on encrypted files it might
859 * take a fair bit of work to get if the file wasn't opened recently.
860 *
861 * f2fs sometimes supports DIO reads but not DIO writes. STATX_DIOALIGN
862 * cannot represent that, so in that case we report no DIO support.
863 */
864 if ((request_mask & STATX_DIOALIGN) && S_ISREG(inode->i_mode)) {
865 unsigned int bsize = i_blocksize(inode);
866
867 stat->result_mask |= STATX_DIOALIGN;
868 if (!f2fs_force_buffered_io(inode, WRITE)) {
869 stat->dio_mem_align = bsize;
870 stat->dio_offset_align = bsize;
871 }
872 }
873
874 flags = fi->i_flags;
875 if (flags & F2FS_COMPR_FL)
876 stat->attributes |= STATX_ATTR_COMPRESSED;
877 if (flags & F2FS_APPEND_FL)
878 stat->attributes |= STATX_ATTR_APPEND;
879 if (IS_ENCRYPTED(inode))
880 stat->attributes |= STATX_ATTR_ENCRYPTED;
881 if (flags & F2FS_IMMUTABLE_FL)
882 stat->attributes |= STATX_ATTR_IMMUTABLE;
883 if (flags & F2FS_NODUMP_FL)
884 stat->attributes |= STATX_ATTR_NODUMP;
885 if (IS_VERITY(inode))
886 stat->attributes |= STATX_ATTR_VERITY;
887
888 stat->attributes_mask |= (STATX_ATTR_COMPRESSED |
889 STATX_ATTR_APPEND |
890 STATX_ATTR_ENCRYPTED |
891 STATX_ATTR_IMMUTABLE |
892 STATX_ATTR_NODUMP |
893 STATX_ATTR_VERITY);
894
895 generic_fillattr(mnt_userns, inode, stat);
896
897 /* we need to show initial sectors used for inline_data/dentries */
898 if ((S_ISREG(inode->i_mode) && f2fs_has_inline_data(inode)) ||
899 f2fs_has_inline_dentry(inode))
900 stat->blocks += (stat->size + 511) >> 9;
901
902 return 0;
903}
904
905#ifdef CONFIG_F2FS_FS_POSIX_ACL
906static void __setattr_copy(struct user_namespace *mnt_userns,
907 struct inode *inode, const struct iattr *attr)
908{
909 unsigned int ia_valid = attr->ia_valid;
910
911 i_uid_update(mnt_userns, attr, inode);
912 i_gid_update(mnt_userns, attr, inode);
913 if (ia_valid & ATTR_ATIME)
914 inode->i_atime = attr->ia_atime;
915 if (ia_valid & ATTR_MTIME)
916 inode->i_mtime = attr->ia_mtime;
917 if (ia_valid & ATTR_CTIME)
918 inode->i_ctime = attr->ia_ctime;
919 if (ia_valid & ATTR_MODE) {
920 umode_t mode = attr->ia_mode;
921 vfsgid_t vfsgid = i_gid_into_vfsgid(mnt_userns, inode);
922
923 if (!vfsgid_in_group_p(vfsgid) &&
924 !capable_wrt_inode_uidgid(mnt_userns, inode, CAP_FSETID))
925 mode &= ~S_ISGID;
926 set_acl_inode(inode, mode);
927 }
928}
929#else
930#define __setattr_copy setattr_copy
931#endif
932
933int f2fs_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
934 struct iattr *attr)
935{
936 struct inode *inode = d_inode(dentry);
937 int err;
938
939 if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
940 return -EIO;
941
942 if (unlikely(IS_IMMUTABLE(inode)))
943 return -EPERM;
944
945 if (unlikely(IS_APPEND(inode) &&
946 (attr->ia_valid & (ATTR_MODE | ATTR_UID |
947 ATTR_GID | ATTR_TIMES_SET))))
948 return -EPERM;
949
950 if ((attr->ia_valid & ATTR_SIZE) &&
951 !f2fs_is_compress_backend_ready(inode))
952 return -EOPNOTSUPP;
953
954 err = setattr_prepare(mnt_userns, dentry, attr);
955 if (err)
956 return err;
957
958 err = fscrypt_prepare_setattr(dentry, attr);
959 if (err)
960 return err;
961
962 err = fsverity_prepare_setattr(dentry, attr);
963 if (err)
964 return err;
965
966 if (is_quota_modification(mnt_userns, inode, attr)) {
967 err = f2fs_dquot_initialize(inode);
968 if (err)
969 return err;
970 }
971 if (i_uid_needs_update(mnt_userns, attr, inode) ||
972 i_gid_needs_update(mnt_userns, attr, inode)) {
973 f2fs_lock_op(F2FS_I_SB(inode));
974 err = dquot_transfer(mnt_userns, inode, attr);
975 if (err) {
976 set_sbi_flag(F2FS_I_SB(inode),
977 SBI_QUOTA_NEED_REPAIR);
978 f2fs_unlock_op(F2FS_I_SB(inode));
979 return err;
980 }
981 /*
982 * update uid/gid under lock_op(), so that dquot and inode can
983 * be updated atomically.
984 */
985 i_uid_update(mnt_userns, attr, inode);
986 i_gid_update(mnt_userns, attr, inode);
987 f2fs_mark_inode_dirty_sync(inode, true);
988 f2fs_unlock_op(F2FS_I_SB(inode));
989 }
990
991 if (attr->ia_valid & ATTR_SIZE) {
992 loff_t old_size = i_size_read(inode);
993
994 if (attr->ia_size > MAX_INLINE_DATA(inode)) {
995 /*
996 * should convert inline inode before i_size_write to
997 * keep smaller than inline_data size with inline flag.
998 */
999 err = f2fs_convert_inline_inode(inode);
1000 if (err)
1001 return err;
1002 }
1003
1004 f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
1005 filemap_invalidate_lock(inode->i_mapping);
1006
1007 truncate_setsize(inode, attr->ia_size);
1008
1009 if (attr->ia_size <= old_size)
1010 err = f2fs_truncate(inode);
1011 /*
1012 * do not trim all blocks after i_size if target size is
1013 * larger than i_size.
1014 */
1015 filemap_invalidate_unlock(inode->i_mapping);
1016 f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
1017 if (err)
1018 return err;
1019
1020 spin_lock(&F2FS_I(inode)->i_size_lock);
1021 inode->i_mtime = inode->i_ctime = current_time(inode);
1022 F2FS_I(inode)->last_disk_size = i_size_read(inode);
1023 spin_unlock(&F2FS_I(inode)->i_size_lock);
1024 }
1025
1026 __setattr_copy(mnt_userns, inode, attr);
1027
1028 if (attr->ia_valid & ATTR_MODE) {
1029 err = posix_acl_chmod(mnt_userns, dentry, f2fs_get_inode_mode(inode));
1030
1031 if (is_inode_flag_set(inode, FI_ACL_MODE)) {
1032 if (!err)
1033 inode->i_mode = F2FS_I(inode)->i_acl_mode;
1034 clear_inode_flag(inode, FI_ACL_MODE);
1035 }
1036 }
1037
1038 /* file size may changed here */
1039 f2fs_mark_inode_dirty_sync(inode, true);
1040
1041 /* inode change will produce dirty node pages flushed by checkpoint */
1042 f2fs_balance_fs(F2FS_I_SB(inode), true);
1043
1044 return err;
1045}
1046
1047const struct inode_operations f2fs_file_inode_operations = {
1048 .getattr = f2fs_getattr,
1049 .setattr = f2fs_setattr,
1050 .get_inode_acl = f2fs_get_acl,
1051 .set_acl = f2fs_set_acl,
1052 .listxattr = f2fs_listxattr,
1053 .fiemap = f2fs_fiemap,
1054 .fileattr_get = f2fs_fileattr_get,
1055 .fileattr_set = f2fs_fileattr_set,
1056};
1057
1058static int fill_zero(struct inode *inode, pgoff_t index,
1059 loff_t start, loff_t len)
1060{
1061 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1062 struct page *page;
1063
1064 if (!len)
1065 return 0;
1066
1067 f2fs_balance_fs(sbi, true);
1068
1069 f2fs_lock_op(sbi);
1070 page = f2fs_get_new_data_page(inode, NULL, index, false);
1071 f2fs_unlock_op(sbi);
1072
1073 if (IS_ERR(page))
1074 return PTR_ERR(page);
1075
1076 f2fs_wait_on_page_writeback(page, DATA, true, true);
1077 zero_user(page, start, len);
1078 set_page_dirty(page);
1079 f2fs_put_page(page, 1);
1080 return 0;
1081}
1082
1083int f2fs_truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end)
1084{
1085 int err;
1086
1087 while (pg_start < pg_end) {
1088 struct dnode_of_data dn;
1089 pgoff_t end_offset, count;
1090
1091 set_new_dnode(&dn, inode, NULL, NULL, 0);
1092 err = f2fs_get_dnode_of_data(&dn, pg_start, LOOKUP_NODE);
1093 if (err) {
1094 if (err == -ENOENT) {
1095 pg_start = f2fs_get_next_page_offset(&dn,
1096 pg_start);
1097 continue;
1098 }
1099 return err;
1100 }
1101
1102 end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
1103 count = min(end_offset - dn.ofs_in_node, pg_end - pg_start);
1104
1105 f2fs_bug_on(F2FS_I_SB(inode), count == 0 || count > end_offset);
1106
1107 f2fs_truncate_data_blocks_range(&dn, count);
1108 f2fs_put_dnode(&dn);
1109
1110 pg_start += count;
1111 }
1112 return 0;
1113}
1114
1115static int punch_hole(struct inode *inode, loff_t offset, loff_t len)
1116{
1117 pgoff_t pg_start, pg_end;
1118 loff_t off_start, off_end;
1119 int ret;
1120
1121 ret = f2fs_convert_inline_inode(inode);
1122 if (ret)
1123 return ret;
1124
1125 pg_start = ((unsigned long long) offset) >> PAGE_SHIFT;
1126 pg_end = ((unsigned long long) offset + len) >> PAGE_SHIFT;
1127
1128 off_start = offset & (PAGE_SIZE - 1);
1129 off_end = (offset + len) & (PAGE_SIZE - 1);
1130
1131 if (pg_start == pg_end) {
1132 ret = fill_zero(inode, pg_start, off_start,
1133 off_end - off_start);
1134 if (ret)
1135 return ret;
1136 } else {
1137 if (off_start) {
1138 ret = fill_zero(inode, pg_start++, off_start,
1139 PAGE_SIZE - off_start);
1140 if (ret)
1141 return ret;
1142 }
1143 if (off_end) {
1144 ret = fill_zero(inode, pg_end, 0, off_end);
1145 if (ret)
1146 return ret;
1147 }
1148
1149 if (pg_start < pg_end) {
1150 loff_t blk_start, blk_end;
1151 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1152
1153 f2fs_balance_fs(sbi, true);
1154
1155 blk_start = (loff_t)pg_start << PAGE_SHIFT;
1156 blk_end = (loff_t)pg_end << PAGE_SHIFT;
1157
1158 f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
1159 filemap_invalidate_lock(inode->i_mapping);
1160
1161 truncate_pagecache_range(inode, blk_start, blk_end - 1);
1162
1163 f2fs_lock_op(sbi);
1164 ret = f2fs_truncate_hole(inode, pg_start, pg_end);
1165 f2fs_unlock_op(sbi);
1166
1167 filemap_invalidate_unlock(inode->i_mapping);
1168 f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
1169 }
1170 }
1171
1172 return ret;
1173}
1174
1175static int __read_out_blkaddrs(struct inode *inode, block_t *blkaddr,
1176 int *do_replace, pgoff_t off, pgoff_t len)
1177{
1178 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1179 struct dnode_of_data dn;
1180 int ret, done, i;
1181
1182next_dnode:
1183 set_new_dnode(&dn, inode, NULL, NULL, 0);
1184 ret = f2fs_get_dnode_of_data(&dn, off, LOOKUP_NODE_RA);
1185 if (ret && ret != -ENOENT) {
1186 return ret;
1187 } else if (ret == -ENOENT) {
1188 if (dn.max_level == 0)
1189 return -ENOENT;
1190 done = min((pgoff_t)ADDRS_PER_BLOCK(inode) -
1191 dn.ofs_in_node, len);
1192 blkaddr += done;
1193 do_replace += done;
1194 goto next;
1195 }
1196
1197 done = min((pgoff_t)ADDRS_PER_PAGE(dn.node_page, inode) -
1198 dn.ofs_in_node, len);
1199 for (i = 0; i < done; i++, blkaddr++, do_replace++, dn.ofs_in_node++) {
1200 *blkaddr = f2fs_data_blkaddr(&dn);
1201
1202 if (__is_valid_data_blkaddr(*blkaddr) &&
1203 !f2fs_is_valid_blkaddr(sbi, *blkaddr,
1204 DATA_GENERIC_ENHANCE)) {
1205 f2fs_put_dnode(&dn);
1206 f2fs_handle_error(sbi, ERROR_INVALID_BLKADDR);
1207 return -EFSCORRUPTED;
1208 }
1209
1210 if (!f2fs_is_checkpointed_data(sbi, *blkaddr)) {
1211
1212 if (f2fs_lfs_mode(sbi)) {
1213 f2fs_put_dnode(&dn);
1214 return -EOPNOTSUPP;
1215 }
1216
1217 /* do not invalidate this block address */
1218 f2fs_update_data_blkaddr(&dn, NULL_ADDR);
1219 *do_replace = 1;
1220 }
1221 }
1222 f2fs_put_dnode(&dn);
1223next:
1224 len -= done;
1225 off += done;
1226 if (len)
1227 goto next_dnode;
1228 return 0;
1229}
1230
1231static int __roll_back_blkaddrs(struct inode *inode, block_t *blkaddr,
1232 int *do_replace, pgoff_t off, int len)
1233{
1234 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1235 struct dnode_of_data dn;
1236 int ret, i;
1237
1238 for (i = 0; i < len; i++, do_replace++, blkaddr++) {
1239 if (*do_replace == 0)
1240 continue;
1241
1242 set_new_dnode(&dn, inode, NULL, NULL, 0);
1243 ret = f2fs_get_dnode_of_data(&dn, off + i, LOOKUP_NODE_RA);
1244 if (ret) {
1245 dec_valid_block_count(sbi, inode, 1);
1246 f2fs_invalidate_blocks(sbi, *blkaddr);
1247 } else {
1248 f2fs_update_data_blkaddr(&dn, *blkaddr);
1249 }
1250 f2fs_put_dnode(&dn);
1251 }
1252 return 0;
1253}
1254
1255static int __clone_blkaddrs(struct inode *src_inode, struct inode *dst_inode,
1256 block_t *blkaddr, int *do_replace,
1257 pgoff_t src, pgoff_t dst, pgoff_t len, bool full)
1258{
1259 struct f2fs_sb_info *sbi = F2FS_I_SB(src_inode);
1260 pgoff_t i = 0;
1261 int ret;
1262
1263 while (i < len) {
1264 if (blkaddr[i] == NULL_ADDR && !full) {
1265 i++;
1266 continue;
1267 }
1268
1269 if (do_replace[i] || blkaddr[i] == NULL_ADDR) {
1270 struct dnode_of_data dn;
1271 struct node_info ni;
1272 size_t new_size;
1273 pgoff_t ilen;
1274
1275 set_new_dnode(&dn, dst_inode, NULL, NULL, 0);
1276 ret = f2fs_get_dnode_of_data(&dn, dst + i, ALLOC_NODE);
1277 if (ret)
1278 return ret;
1279
1280 ret = f2fs_get_node_info(sbi, dn.nid, &ni, false);
1281 if (ret) {
1282 f2fs_put_dnode(&dn);
1283 return ret;
1284 }
1285
1286 ilen = min((pgoff_t)
1287 ADDRS_PER_PAGE(dn.node_page, dst_inode) -
1288 dn.ofs_in_node, len - i);
1289 do {
1290 dn.data_blkaddr = f2fs_data_blkaddr(&dn);
1291 f2fs_truncate_data_blocks_range(&dn, 1);
1292
1293 if (do_replace[i]) {
1294 f2fs_i_blocks_write(src_inode,
1295 1, false, false);
1296 f2fs_i_blocks_write(dst_inode,
1297 1, true, false);
1298 f2fs_replace_block(sbi, &dn, dn.data_blkaddr,
1299 blkaddr[i], ni.version, true, false);
1300
1301 do_replace[i] = 0;
1302 }
1303 dn.ofs_in_node++;
1304 i++;
1305 new_size = (loff_t)(dst + i) << PAGE_SHIFT;
1306 if (dst_inode->i_size < new_size)
1307 f2fs_i_size_write(dst_inode, new_size);
1308 } while (--ilen && (do_replace[i] || blkaddr[i] == NULL_ADDR));
1309
1310 f2fs_put_dnode(&dn);
1311 } else {
1312 struct page *psrc, *pdst;
1313
1314 psrc = f2fs_get_lock_data_page(src_inode,
1315 src + i, true);
1316 if (IS_ERR(psrc))
1317 return PTR_ERR(psrc);
1318 pdst = f2fs_get_new_data_page(dst_inode, NULL, dst + i,
1319 true);
1320 if (IS_ERR(pdst)) {
1321 f2fs_put_page(psrc, 1);
1322 return PTR_ERR(pdst);
1323 }
1324 memcpy_page(pdst, 0, psrc, 0, PAGE_SIZE);
1325 set_page_dirty(pdst);
1326 f2fs_put_page(pdst, 1);
1327 f2fs_put_page(psrc, 1);
1328
1329 ret = f2fs_truncate_hole(src_inode,
1330 src + i, src + i + 1);
1331 if (ret)
1332 return ret;
1333 i++;
1334 }
1335 }
1336 return 0;
1337}
1338
1339static int __exchange_data_block(struct inode *src_inode,
1340 struct inode *dst_inode, pgoff_t src, pgoff_t dst,
1341 pgoff_t len, bool full)
1342{
1343 block_t *src_blkaddr;
1344 int *do_replace;
1345 pgoff_t olen;
1346 int ret;
1347
1348 while (len) {
1349 olen = min((pgoff_t)4 * ADDRS_PER_BLOCK(src_inode), len);
1350
1351 src_blkaddr = f2fs_kvzalloc(F2FS_I_SB(src_inode),
1352 array_size(olen, sizeof(block_t)),
1353 GFP_NOFS);
1354 if (!src_blkaddr)
1355 return -ENOMEM;
1356
1357 do_replace = f2fs_kvzalloc(F2FS_I_SB(src_inode),
1358 array_size(olen, sizeof(int)),
1359 GFP_NOFS);
1360 if (!do_replace) {
1361 kvfree(src_blkaddr);
1362 return -ENOMEM;
1363 }
1364
1365 ret = __read_out_blkaddrs(src_inode, src_blkaddr,
1366 do_replace, src, olen);
1367 if (ret)
1368 goto roll_back;
1369
1370 ret = __clone_blkaddrs(src_inode, dst_inode, src_blkaddr,
1371 do_replace, src, dst, olen, full);
1372 if (ret)
1373 goto roll_back;
1374
1375 src += olen;
1376 dst += olen;
1377 len -= olen;
1378
1379 kvfree(src_blkaddr);
1380 kvfree(do_replace);
1381 }
1382 return 0;
1383
1384roll_back:
1385 __roll_back_blkaddrs(src_inode, src_blkaddr, do_replace, src, olen);
1386 kvfree(src_blkaddr);
1387 kvfree(do_replace);
1388 return ret;
1389}
1390
1391static int f2fs_do_collapse(struct inode *inode, loff_t offset, loff_t len)
1392{
1393 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1394 pgoff_t nrpages = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE);
1395 pgoff_t start = offset >> PAGE_SHIFT;
1396 pgoff_t end = (offset + len) >> PAGE_SHIFT;
1397 int ret;
1398
1399 f2fs_balance_fs(sbi, true);
1400
1401 /* avoid gc operation during block exchange */
1402 f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
1403 filemap_invalidate_lock(inode->i_mapping);
1404
1405 f2fs_lock_op(sbi);
1406 f2fs_drop_extent_tree(inode);
1407 truncate_pagecache(inode, offset);
1408 ret = __exchange_data_block(inode, inode, end, start, nrpages - end, true);
1409 f2fs_unlock_op(sbi);
1410
1411 filemap_invalidate_unlock(inode->i_mapping);
1412 f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
1413 return ret;
1414}
1415
1416static int f2fs_collapse_range(struct inode *inode, loff_t offset, loff_t len)
1417{
1418 loff_t new_size;
1419 int ret;
1420
1421 if (offset + len >= i_size_read(inode))
1422 return -EINVAL;
1423
1424 /* collapse range should be aligned to block size of f2fs. */
1425 if (offset & (F2FS_BLKSIZE - 1) || len & (F2FS_BLKSIZE - 1))
1426 return -EINVAL;
1427
1428 ret = f2fs_convert_inline_inode(inode);
1429 if (ret)
1430 return ret;
1431
1432 /* write out all dirty pages from offset */
1433 ret = filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX);
1434 if (ret)
1435 return ret;
1436
1437 ret = f2fs_do_collapse(inode, offset, len);
1438 if (ret)
1439 return ret;
1440
1441 /* write out all moved pages, if possible */
1442 filemap_invalidate_lock(inode->i_mapping);
1443 filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX);
1444 truncate_pagecache(inode, offset);
1445
1446 new_size = i_size_read(inode) - len;
1447 ret = f2fs_truncate_blocks(inode, new_size, true);
1448 filemap_invalidate_unlock(inode->i_mapping);
1449 if (!ret)
1450 f2fs_i_size_write(inode, new_size);
1451 return ret;
1452}
1453
1454static int f2fs_do_zero_range(struct dnode_of_data *dn, pgoff_t start,
1455 pgoff_t end)
1456{
1457 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
1458 pgoff_t index = start;
1459 unsigned int ofs_in_node = dn->ofs_in_node;
1460 blkcnt_t count = 0;
1461 int ret;
1462
1463 for (; index < end; index++, dn->ofs_in_node++) {
1464 if (f2fs_data_blkaddr(dn) == NULL_ADDR)
1465 count++;
1466 }
1467
1468 dn->ofs_in_node = ofs_in_node;
1469 ret = f2fs_reserve_new_blocks(dn, count);
1470 if (ret)
1471 return ret;
1472
1473 dn->ofs_in_node = ofs_in_node;
1474 for (index = start; index < end; index++, dn->ofs_in_node++) {
1475 dn->data_blkaddr = f2fs_data_blkaddr(dn);
1476 /*
1477 * f2fs_reserve_new_blocks will not guarantee entire block
1478 * allocation.
1479 */
1480 if (dn->data_blkaddr == NULL_ADDR) {
1481 ret = -ENOSPC;
1482 break;
1483 }
1484
1485 if (dn->data_blkaddr == NEW_ADDR)
1486 continue;
1487
1488 if (!f2fs_is_valid_blkaddr(sbi, dn->data_blkaddr,
1489 DATA_GENERIC_ENHANCE)) {
1490 ret = -EFSCORRUPTED;
1491 f2fs_handle_error(sbi, ERROR_INVALID_BLKADDR);
1492 break;
1493 }
1494
1495 f2fs_invalidate_blocks(sbi, dn->data_blkaddr);
1496 dn->data_blkaddr = NEW_ADDR;
1497 f2fs_set_data_blkaddr(dn);
1498 }
1499
1500 f2fs_update_read_extent_cache_range(dn, start, 0, index - start);
1501
1502 return ret;
1503}
1504
1505static int f2fs_zero_range(struct inode *inode, loff_t offset, loff_t len,
1506 int mode)
1507{
1508 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1509 struct address_space *mapping = inode->i_mapping;
1510 pgoff_t index, pg_start, pg_end;
1511 loff_t new_size = i_size_read(inode);
1512 loff_t off_start, off_end;
1513 int ret = 0;
1514
1515 ret = inode_newsize_ok(inode, (len + offset));
1516 if (ret)
1517 return ret;
1518
1519 ret = f2fs_convert_inline_inode(inode);
1520 if (ret)
1521 return ret;
1522
1523 ret = filemap_write_and_wait_range(mapping, offset, offset + len - 1);
1524 if (ret)
1525 return ret;
1526
1527 pg_start = ((unsigned long long) offset) >> PAGE_SHIFT;
1528 pg_end = ((unsigned long long) offset + len) >> PAGE_SHIFT;
1529
1530 off_start = offset & (PAGE_SIZE - 1);
1531 off_end = (offset + len) & (PAGE_SIZE - 1);
1532
1533 if (pg_start == pg_end) {
1534 ret = fill_zero(inode, pg_start, off_start,
1535 off_end - off_start);
1536 if (ret)
1537 return ret;
1538
1539 new_size = max_t(loff_t, new_size, offset + len);
1540 } else {
1541 if (off_start) {
1542 ret = fill_zero(inode, pg_start++, off_start,
1543 PAGE_SIZE - off_start);
1544 if (ret)
1545 return ret;
1546
1547 new_size = max_t(loff_t, new_size,
1548 (loff_t)pg_start << PAGE_SHIFT);
1549 }
1550
1551 for (index = pg_start; index < pg_end;) {
1552 struct dnode_of_data dn;
1553 unsigned int end_offset;
1554 pgoff_t end;
1555
1556 f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
1557 filemap_invalidate_lock(mapping);
1558
1559 truncate_pagecache_range(inode,
1560 (loff_t)index << PAGE_SHIFT,
1561 ((loff_t)pg_end << PAGE_SHIFT) - 1);
1562
1563 f2fs_lock_op(sbi);
1564
1565 set_new_dnode(&dn, inode, NULL, NULL, 0);
1566 ret = f2fs_get_dnode_of_data(&dn, index, ALLOC_NODE);
1567 if (ret) {
1568 f2fs_unlock_op(sbi);
1569 filemap_invalidate_unlock(mapping);
1570 f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
1571 goto out;
1572 }
1573
1574 end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
1575 end = min(pg_end, end_offset - dn.ofs_in_node + index);
1576
1577 ret = f2fs_do_zero_range(&dn, index, end);
1578 f2fs_put_dnode(&dn);
1579
1580 f2fs_unlock_op(sbi);
1581 filemap_invalidate_unlock(mapping);
1582 f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
1583
1584 f2fs_balance_fs(sbi, dn.node_changed);
1585
1586 if (ret)
1587 goto out;
1588
1589 index = end;
1590 new_size = max_t(loff_t, new_size,
1591 (loff_t)index << PAGE_SHIFT);
1592 }
1593
1594 if (off_end) {
1595 ret = fill_zero(inode, pg_end, 0, off_end);
1596 if (ret)
1597 goto out;
1598
1599 new_size = max_t(loff_t, new_size, offset + len);
1600 }
1601 }
1602
1603out:
1604 if (new_size > i_size_read(inode)) {
1605 if (mode & FALLOC_FL_KEEP_SIZE)
1606 file_set_keep_isize(inode);
1607 else
1608 f2fs_i_size_write(inode, new_size);
1609 }
1610 return ret;
1611}
1612
1613static int f2fs_insert_range(struct inode *inode, loff_t offset, loff_t len)
1614{
1615 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1616 struct address_space *mapping = inode->i_mapping;
1617 pgoff_t nr, pg_start, pg_end, delta, idx;
1618 loff_t new_size;
1619 int ret = 0;
1620
1621 new_size = i_size_read(inode) + len;
1622 ret = inode_newsize_ok(inode, new_size);
1623 if (ret)
1624 return ret;
1625
1626 if (offset >= i_size_read(inode))
1627 return -EINVAL;
1628
1629 /* insert range should be aligned to block size of f2fs. */
1630 if (offset & (F2FS_BLKSIZE - 1) || len & (F2FS_BLKSIZE - 1))
1631 return -EINVAL;
1632
1633 ret = f2fs_convert_inline_inode(inode);
1634 if (ret)
1635 return ret;
1636
1637 f2fs_balance_fs(sbi, true);
1638
1639 filemap_invalidate_lock(mapping);
1640 ret = f2fs_truncate_blocks(inode, i_size_read(inode), true);
1641 filemap_invalidate_unlock(mapping);
1642 if (ret)
1643 return ret;
1644
1645 /* write out all dirty pages from offset */
1646 ret = filemap_write_and_wait_range(mapping, offset, LLONG_MAX);
1647 if (ret)
1648 return ret;
1649
1650 pg_start = offset >> PAGE_SHIFT;
1651 pg_end = (offset + len) >> PAGE_SHIFT;
1652 delta = pg_end - pg_start;
1653 idx = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE);
1654
1655 /* avoid gc operation during block exchange */
1656 f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
1657 filemap_invalidate_lock(mapping);
1658 truncate_pagecache(inode, offset);
1659
1660 while (!ret && idx > pg_start) {
1661 nr = idx - pg_start;
1662 if (nr > delta)
1663 nr = delta;
1664 idx -= nr;
1665
1666 f2fs_lock_op(sbi);
1667 f2fs_drop_extent_tree(inode);
1668
1669 ret = __exchange_data_block(inode, inode, idx,
1670 idx + delta, nr, false);
1671 f2fs_unlock_op(sbi);
1672 }
1673 filemap_invalidate_unlock(mapping);
1674 f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
1675
1676 /* write out all moved pages, if possible */
1677 filemap_invalidate_lock(mapping);
1678 filemap_write_and_wait_range(mapping, offset, LLONG_MAX);
1679 truncate_pagecache(inode, offset);
1680 filemap_invalidate_unlock(mapping);
1681
1682 if (!ret)
1683 f2fs_i_size_write(inode, new_size);
1684 return ret;
1685}
1686
1687static int expand_inode_data(struct inode *inode, loff_t offset,
1688 loff_t len, int mode)
1689{
1690 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1691 struct f2fs_map_blocks map = { .m_next_pgofs = NULL,
1692 .m_next_extent = NULL, .m_seg_type = NO_CHECK_TYPE,
1693 .m_may_create = true };
1694 struct f2fs_gc_control gc_control = { .victim_segno = NULL_SEGNO,
1695 .init_gc_type = FG_GC,
1696 .should_migrate_blocks = false,
1697 .err_gc_skipped = true,
1698 .nr_free_secs = 0 };
1699 pgoff_t pg_start, pg_end;
1700 loff_t new_size = i_size_read(inode);
1701 loff_t off_end;
1702 block_t expanded = 0;
1703 int err;
1704
1705 err = inode_newsize_ok(inode, (len + offset));
1706 if (err)
1707 return err;
1708
1709 err = f2fs_convert_inline_inode(inode);
1710 if (err)
1711 return err;
1712
1713 f2fs_balance_fs(sbi, true);
1714
1715 pg_start = ((unsigned long long)offset) >> PAGE_SHIFT;
1716 pg_end = ((unsigned long long)offset + len) >> PAGE_SHIFT;
1717 off_end = (offset + len) & (PAGE_SIZE - 1);
1718
1719 map.m_lblk = pg_start;
1720 map.m_len = pg_end - pg_start;
1721 if (off_end)
1722 map.m_len++;
1723
1724 if (!map.m_len)
1725 return 0;
1726
1727 if (f2fs_is_pinned_file(inode)) {
1728 block_t sec_blks = CAP_BLKS_PER_SEC(sbi);
1729 block_t sec_len = roundup(map.m_len, sec_blks);
1730
1731 map.m_len = sec_blks;
1732next_alloc:
1733 if (has_not_enough_free_secs(sbi, 0,
1734 GET_SEC_FROM_SEG(sbi, overprovision_segments(sbi)))) {
1735 f2fs_down_write(&sbi->gc_lock);
1736 err = f2fs_gc(sbi, &gc_control);
1737 if (err && err != -ENODATA)
1738 goto out_err;
1739 }
1740
1741 f2fs_down_write(&sbi->pin_sem);
1742
1743 f2fs_lock_op(sbi);
1744 f2fs_allocate_new_section(sbi, CURSEG_COLD_DATA_PINNED, false);
1745 f2fs_unlock_op(sbi);
1746
1747 map.m_seg_type = CURSEG_COLD_DATA_PINNED;
1748 err = f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_PRE_DIO);
1749 file_dont_truncate(inode);
1750
1751 f2fs_up_write(&sbi->pin_sem);
1752
1753 expanded += map.m_len;
1754 sec_len -= map.m_len;
1755 map.m_lblk += map.m_len;
1756 if (!err && sec_len)
1757 goto next_alloc;
1758
1759 map.m_len = expanded;
1760 } else {
1761 err = f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_PRE_AIO);
1762 expanded = map.m_len;
1763 }
1764out_err:
1765 if (err) {
1766 pgoff_t last_off;
1767
1768 if (!expanded)
1769 return err;
1770
1771 last_off = pg_start + expanded - 1;
1772
1773 /* update new size to the failed position */
1774 new_size = (last_off == pg_end) ? offset + len :
1775 (loff_t)(last_off + 1) << PAGE_SHIFT;
1776 } else {
1777 new_size = ((loff_t)pg_end << PAGE_SHIFT) + off_end;
1778 }
1779
1780 if (new_size > i_size_read(inode)) {
1781 if (mode & FALLOC_FL_KEEP_SIZE)
1782 file_set_keep_isize(inode);
1783 else
1784 f2fs_i_size_write(inode, new_size);
1785 }
1786
1787 return err;
1788}
1789
1790static long f2fs_fallocate(struct file *file, int mode,
1791 loff_t offset, loff_t len)
1792{
1793 struct inode *inode = file_inode(file);
1794 long ret = 0;
1795
1796 if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
1797 return -EIO;
1798 if (!f2fs_is_checkpoint_ready(F2FS_I_SB(inode)))
1799 return -ENOSPC;
1800 if (!f2fs_is_compress_backend_ready(inode))
1801 return -EOPNOTSUPP;
1802
1803 /* f2fs only support ->fallocate for regular file */
1804 if (!S_ISREG(inode->i_mode))
1805 return -EINVAL;
1806
1807 if (IS_ENCRYPTED(inode) &&
1808 (mode & (FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_INSERT_RANGE)))
1809 return -EOPNOTSUPP;
1810
1811 /*
1812 * Pinned file should not support partial trucation since the block
1813 * can be used by applications.
1814 */
1815 if ((f2fs_compressed_file(inode) || f2fs_is_pinned_file(inode)) &&
1816 (mode & (FALLOC_FL_PUNCH_HOLE | FALLOC_FL_COLLAPSE_RANGE |
1817 FALLOC_FL_ZERO_RANGE | FALLOC_FL_INSERT_RANGE)))
1818 return -EOPNOTSUPP;
1819
1820 if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE |
1821 FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_ZERO_RANGE |
1822 FALLOC_FL_INSERT_RANGE))
1823 return -EOPNOTSUPP;
1824
1825 inode_lock(inode);
1826
1827 ret = file_modified(file);
1828 if (ret)
1829 goto out;
1830
1831 if (mode & FALLOC_FL_PUNCH_HOLE) {
1832 if (offset >= inode->i_size)
1833 goto out;
1834
1835 ret = punch_hole(inode, offset, len);
1836 } else if (mode & FALLOC_FL_COLLAPSE_RANGE) {
1837 ret = f2fs_collapse_range(inode, offset, len);
1838 } else if (mode & FALLOC_FL_ZERO_RANGE) {
1839 ret = f2fs_zero_range(inode, offset, len, mode);
1840 } else if (mode & FALLOC_FL_INSERT_RANGE) {
1841 ret = f2fs_insert_range(inode, offset, len);
1842 } else {
1843 ret = expand_inode_data(inode, offset, len, mode);
1844 }
1845
1846 if (!ret) {
1847 inode->i_mtime = inode->i_ctime = current_time(inode);
1848 f2fs_mark_inode_dirty_sync(inode, false);
1849 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
1850 }
1851
1852out:
1853 inode_unlock(inode);
1854
1855 trace_f2fs_fallocate(inode, mode, offset, len, ret);
1856 return ret;
1857}
1858
1859static int f2fs_release_file(struct inode *inode, struct file *filp)
1860{
1861 /*
1862 * f2fs_relase_file is called at every close calls. So we should
1863 * not drop any inmemory pages by close called by other process.
1864 */
1865 if (!(filp->f_mode & FMODE_WRITE) ||
1866 atomic_read(&inode->i_writecount) != 1)
1867 return 0;
1868
1869 f2fs_abort_atomic_write(inode, true);
1870 return 0;
1871}
1872
1873static int f2fs_file_flush(struct file *file, fl_owner_t id)
1874{
1875 struct inode *inode = file_inode(file);
1876
1877 /*
1878 * If the process doing a transaction is crashed, we should do
1879 * roll-back. Otherwise, other reader/write can see corrupted database
1880 * until all the writers close its file. Since this should be done
1881 * before dropping file lock, it needs to do in ->flush.
1882 */
1883 if (F2FS_I(inode)->atomic_write_task == current)
1884 f2fs_abort_atomic_write(inode, true);
1885 return 0;
1886}
1887
1888static int f2fs_setflags_common(struct inode *inode, u32 iflags, u32 mask)
1889{
1890 struct f2fs_inode_info *fi = F2FS_I(inode);
1891 u32 masked_flags = fi->i_flags & mask;
1892
1893 /* mask can be shrunk by flags_valid selector */
1894 iflags &= mask;
1895
1896 /* Is it quota file? Do not allow user to mess with it */
1897 if (IS_NOQUOTA(inode))
1898 return -EPERM;
1899
1900 if ((iflags ^ masked_flags) & F2FS_CASEFOLD_FL) {
1901 if (!f2fs_sb_has_casefold(F2FS_I_SB(inode)))
1902 return -EOPNOTSUPP;
1903 if (!f2fs_empty_dir(inode))
1904 return -ENOTEMPTY;
1905 }
1906
1907 if (iflags & (F2FS_COMPR_FL | F2FS_NOCOMP_FL)) {
1908 if (!f2fs_sb_has_compression(F2FS_I_SB(inode)))
1909 return -EOPNOTSUPP;
1910 if ((iflags & F2FS_COMPR_FL) && (iflags & F2FS_NOCOMP_FL))
1911 return -EINVAL;
1912 }
1913
1914 if ((iflags ^ masked_flags) & F2FS_COMPR_FL) {
1915 if (masked_flags & F2FS_COMPR_FL) {
1916 if (!f2fs_disable_compressed_file(inode))
1917 return -EINVAL;
1918 } else {
1919 /* try to convert inline_data to support compression */
1920 int err = f2fs_convert_inline_inode(inode);
1921 if (err)
1922 return err;
1923 if (!f2fs_may_compress(inode))
1924 return -EINVAL;
1925 if (S_ISREG(inode->i_mode) && F2FS_HAS_BLOCKS(inode))
1926 return -EINVAL;
1927 if (set_compress_context(inode))
1928 return -EOPNOTSUPP;
1929 }
1930 }
1931
1932 fi->i_flags = iflags | (fi->i_flags & ~mask);
1933 f2fs_bug_on(F2FS_I_SB(inode), (fi->i_flags & F2FS_COMPR_FL) &&
1934 (fi->i_flags & F2FS_NOCOMP_FL));
1935
1936 if (fi->i_flags & F2FS_PROJINHERIT_FL)
1937 set_inode_flag(inode, FI_PROJ_INHERIT);
1938 else
1939 clear_inode_flag(inode, FI_PROJ_INHERIT);
1940
1941 inode->i_ctime = current_time(inode);
1942 f2fs_set_inode_flags(inode);
1943 f2fs_mark_inode_dirty_sync(inode, true);
1944 return 0;
1945}
1946
1947/* FS_IOC_[GS]ETFLAGS and FS_IOC_FS[GS]ETXATTR support */
1948
1949/*
1950 * To make a new on-disk f2fs i_flag gettable via FS_IOC_GETFLAGS, add an entry
1951 * for it to f2fs_fsflags_map[], and add its FS_*_FL equivalent to
1952 * F2FS_GETTABLE_FS_FL. To also make it settable via FS_IOC_SETFLAGS, also add
1953 * its FS_*_FL equivalent to F2FS_SETTABLE_FS_FL.
1954 *
1955 * Translating flags to fsx_flags value used by FS_IOC_FSGETXATTR and
1956 * FS_IOC_FSSETXATTR is done by the VFS.
1957 */
1958
1959static const struct {
1960 u32 iflag;
1961 u32 fsflag;
1962} f2fs_fsflags_map[] = {
1963 { F2FS_COMPR_FL, FS_COMPR_FL },
1964 { F2FS_SYNC_FL, FS_SYNC_FL },
1965 { F2FS_IMMUTABLE_FL, FS_IMMUTABLE_FL },
1966 { F2FS_APPEND_FL, FS_APPEND_FL },
1967 { F2FS_NODUMP_FL, FS_NODUMP_FL },
1968 { F2FS_NOATIME_FL, FS_NOATIME_FL },
1969 { F2FS_NOCOMP_FL, FS_NOCOMP_FL },
1970 { F2FS_INDEX_FL, FS_INDEX_FL },
1971 { F2FS_DIRSYNC_FL, FS_DIRSYNC_FL },
1972 { F2FS_PROJINHERIT_FL, FS_PROJINHERIT_FL },
1973 { F2FS_CASEFOLD_FL, FS_CASEFOLD_FL },
1974};
1975
1976#define F2FS_GETTABLE_FS_FL ( \
1977 FS_COMPR_FL | \
1978 FS_SYNC_FL | \
1979 FS_IMMUTABLE_FL | \
1980 FS_APPEND_FL | \
1981 FS_NODUMP_FL | \
1982 FS_NOATIME_FL | \
1983 FS_NOCOMP_FL | \
1984 FS_INDEX_FL | \
1985 FS_DIRSYNC_FL | \
1986 FS_PROJINHERIT_FL | \
1987 FS_ENCRYPT_FL | \
1988 FS_INLINE_DATA_FL | \
1989 FS_NOCOW_FL | \
1990 FS_VERITY_FL | \
1991 FS_CASEFOLD_FL)
1992
1993#define F2FS_SETTABLE_FS_FL ( \
1994 FS_COMPR_FL | \
1995 FS_SYNC_FL | \
1996 FS_IMMUTABLE_FL | \
1997 FS_APPEND_FL | \
1998 FS_NODUMP_FL | \
1999 FS_NOATIME_FL | \
2000 FS_NOCOMP_FL | \
2001 FS_DIRSYNC_FL | \
2002 FS_PROJINHERIT_FL | \
2003 FS_CASEFOLD_FL)
2004
2005/* Convert f2fs on-disk i_flags to FS_IOC_{GET,SET}FLAGS flags */
2006static inline u32 f2fs_iflags_to_fsflags(u32 iflags)
2007{
2008 u32 fsflags = 0;
2009 int i;
2010
2011 for (i = 0; i < ARRAY_SIZE(f2fs_fsflags_map); i++)
2012 if (iflags & f2fs_fsflags_map[i].iflag)
2013 fsflags |= f2fs_fsflags_map[i].fsflag;
2014
2015 return fsflags;
2016}
2017
2018/* Convert FS_IOC_{GET,SET}FLAGS flags to f2fs on-disk i_flags */
2019static inline u32 f2fs_fsflags_to_iflags(u32 fsflags)
2020{
2021 u32 iflags = 0;
2022 int i;
2023
2024 for (i = 0; i < ARRAY_SIZE(f2fs_fsflags_map); i++)
2025 if (fsflags & f2fs_fsflags_map[i].fsflag)
2026 iflags |= f2fs_fsflags_map[i].iflag;
2027
2028 return iflags;
2029}
2030
2031static int f2fs_ioc_getversion(struct file *filp, unsigned long arg)
2032{
2033 struct inode *inode = file_inode(filp);
2034
2035 return put_user(inode->i_generation, (int __user *)arg);
2036}
2037
2038static int f2fs_ioc_start_atomic_write(struct file *filp, bool truncate)
2039{
2040 struct inode *inode = file_inode(filp);
2041 struct user_namespace *mnt_userns = file_mnt_user_ns(filp);
2042 struct f2fs_inode_info *fi = F2FS_I(inode);
2043 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2044 struct inode *pinode;
2045 loff_t isize;
2046 int ret;
2047
2048 if (!inode_owner_or_capable(mnt_userns, inode))
2049 return -EACCES;
2050
2051 if (!S_ISREG(inode->i_mode))
2052 return -EINVAL;
2053
2054 if (filp->f_flags & O_DIRECT)
2055 return -EINVAL;
2056
2057 ret = mnt_want_write_file(filp);
2058 if (ret)
2059 return ret;
2060
2061 inode_lock(inode);
2062
2063 if (!f2fs_disable_compressed_file(inode)) {
2064 ret = -EINVAL;
2065 goto out;
2066 }
2067
2068 if (f2fs_is_atomic_file(inode))
2069 goto out;
2070
2071 ret = f2fs_convert_inline_inode(inode);
2072 if (ret)
2073 goto out;
2074
2075 f2fs_down_write(&fi->i_gc_rwsem[WRITE]);
2076
2077 /*
2078 * Should wait end_io to count F2FS_WB_CP_DATA correctly by
2079 * f2fs_is_atomic_file.
2080 */
2081 if (get_dirty_pages(inode))
2082 f2fs_warn(sbi, "Unexpected flush for atomic writes: ino=%lu, npages=%u",
2083 inode->i_ino, get_dirty_pages(inode));
2084 ret = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX);
2085 if (ret) {
2086 f2fs_up_write(&fi->i_gc_rwsem[WRITE]);
2087 goto out;
2088 }
2089
2090 /* Create a COW inode for atomic write */
2091 pinode = f2fs_iget(inode->i_sb, fi->i_pino);
2092 if (IS_ERR(pinode)) {
2093 f2fs_up_write(&fi->i_gc_rwsem[WRITE]);
2094 ret = PTR_ERR(pinode);
2095 goto out;
2096 }
2097
2098 ret = f2fs_get_tmpfile(mnt_userns, pinode, &fi->cow_inode);
2099 iput(pinode);
2100 if (ret) {
2101 f2fs_up_write(&fi->i_gc_rwsem[WRITE]);
2102 goto out;
2103 }
2104
2105 f2fs_write_inode(inode, NULL);
2106
2107 stat_inc_atomic_inode(inode);
2108
2109 set_inode_flag(inode, FI_ATOMIC_FILE);
2110 set_inode_flag(fi->cow_inode, FI_COW_FILE);
2111 clear_inode_flag(fi->cow_inode, FI_INLINE_DATA);
2112
2113 isize = i_size_read(inode);
2114 fi->original_i_size = isize;
2115 if (truncate) {
2116 set_inode_flag(inode, FI_ATOMIC_REPLACE);
2117 truncate_inode_pages_final(inode->i_mapping);
2118 f2fs_i_size_write(inode, 0);
2119 isize = 0;
2120 }
2121 f2fs_i_size_write(fi->cow_inode, isize);
2122
2123 f2fs_up_write(&fi->i_gc_rwsem[WRITE]);
2124
2125 f2fs_update_time(sbi, REQ_TIME);
2126 fi->atomic_write_task = current;
2127 stat_update_max_atomic_write(inode);
2128 fi->atomic_write_cnt = 0;
2129out:
2130 inode_unlock(inode);
2131 mnt_drop_write_file(filp);
2132 return ret;
2133}
2134
2135static int f2fs_ioc_commit_atomic_write(struct file *filp)
2136{
2137 struct inode *inode = file_inode(filp);
2138 struct user_namespace *mnt_userns = file_mnt_user_ns(filp);
2139 int ret;
2140
2141 if (!inode_owner_or_capable(mnt_userns, inode))
2142 return -EACCES;
2143
2144 ret = mnt_want_write_file(filp);
2145 if (ret)
2146 return ret;
2147
2148 f2fs_balance_fs(F2FS_I_SB(inode), true);
2149
2150 inode_lock(inode);
2151
2152 if (f2fs_is_atomic_file(inode)) {
2153 ret = f2fs_commit_atomic_write(inode);
2154 if (!ret)
2155 ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 0, true);
2156
2157 f2fs_abort_atomic_write(inode, ret);
2158 } else {
2159 ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 1, false);
2160 }
2161
2162 inode_unlock(inode);
2163 mnt_drop_write_file(filp);
2164 return ret;
2165}
2166
2167static int f2fs_ioc_abort_atomic_write(struct file *filp)
2168{
2169 struct inode *inode = file_inode(filp);
2170 struct user_namespace *mnt_userns = file_mnt_user_ns(filp);
2171 int ret;
2172
2173 if (!inode_owner_or_capable(mnt_userns, inode))
2174 return -EACCES;
2175
2176 ret = mnt_want_write_file(filp);
2177 if (ret)
2178 return ret;
2179
2180 inode_lock(inode);
2181
2182 f2fs_abort_atomic_write(inode, true);
2183
2184 inode_unlock(inode);
2185
2186 mnt_drop_write_file(filp);
2187 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
2188 return ret;
2189}
2190
2191static int f2fs_ioc_shutdown(struct file *filp, unsigned long arg)
2192{
2193 struct inode *inode = file_inode(filp);
2194 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2195 struct super_block *sb = sbi->sb;
2196 __u32 in;
2197 int ret = 0;
2198
2199 if (!capable(CAP_SYS_ADMIN))
2200 return -EPERM;
2201
2202 if (get_user(in, (__u32 __user *)arg))
2203 return -EFAULT;
2204
2205 if (in != F2FS_GOING_DOWN_FULLSYNC) {
2206 ret = mnt_want_write_file(filp);
2207 if (ret) {
2208 if (ret == -EROFS) {
2209 ret = 0;
2210 f2fs_stop_checkpoint(sbi, false,
2211 STOP_CP_REASON_SHUTDOWN);
2212 set_sbi_flag(sbi, SBI_IS_SHUTDOWN);
2213 trace_f2fs_shutdown(sbi, in, ret);
2214 }
2215 return ret;
2216 }
2217 }
2218
2219 switch (in) {
2220 case F2FS_GOING_DOWN_FULLSYNC:
2221 ret = freeze_bdev(sb->s_bdev);
2222 if (ret)
2223 goto out;
2224 f2fs_stop_checkpoint(sbi, false, STOP_CP_REASON_SHUTDOWN);
2225 set_sbi_flag(sbi, SBI_IS_SHUTDOWN);
2226 thaw_bdev(sb->s_bdev);
2227 break;
2228 case F2FS_GOING_DOWN_METASYNC:
2229 /* do checkpoint only */
2230 ret = f2fs_sync_fs(sb, 1);
2231 if (ret)
2232 goto out;
2233 f2fs_stop_checkpoint(sbi, false, STOP_CP_REASON_SHUTDOWN);
2234 set_sbi_flag(sbi, SBI_IS_SHUTDOWN);
2235 break;
2236 case F2FS_GOING_DOWN_NOSYNC:
2237 f2fs_stop_checkpoint(sbi, false, STOP_CP_REASON_SHUTDOWN);
2238 set_sbi_flag(sbi, SBI_IS_SHUTDOWN);
2239 break;
2240 case F2FS_GOING_DOWN_METAFLUSH:
2241 f2fs_sync_meta_pages(sbi, META, LONG_MAX, FS_META_IO);
2242 f2fs_stop_checkpoint(sbi, false, STOP_CP_REASON_SHUTDOWN);
2243 set_sbi_flag(sbi, SBI_IS_SHUTDOWN);
2244 break;
2245 case F2FS_GOING_DOWN_NEED_FSCK:
2246 set_sbi_flag(sbi, SBI_NEED_FSCK);
2247 set_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
2248 set_sbi_flag(sbi, SBI_IS_DIRTY);
2249 /* do checkpoint only */
2250 ret = f2fs_sync_fs(sb, 1);
2251 goto out;
2252 default:
2253 ret = -EINVAL;
2254 goto out;
2255 }
2256
2257 f2fs_stop_gc_thread(sbi);
2258 f2fs_stop_discard_thread(sbi);
2259
2260 f2fs_drop_discard_cmd(sbi);
2261 clear_opt(sbi, DISCARD);
2262
2263 f2fs_update_time(sbi, REQ_TIME);
2264out:
2265 if (in != F2FS_GOING_DOWN_FULLSYNC)
2266 mnt_drop_write_file(filp);
2267
2268 trace_f2fs_shutdown(sbi, in, ret);
2269
2270 return ret;
2271}
2272
2273static int f2fs_ioc_fitrim(struct file *filp, unsigned long arg)
2274{
2275 struct inode *inode = file_inode(filp);
2276 struct super_block *sb = inode->i_sb;
2277 struct fstrim_range range;
2278 int ret;
2279
2280 if (!capable(CAP_SYS_ADMIN))
2281 return -EPERM;
2282
2283 if (!f2fs_hw_support_discard(F2FS_SB(sb)))
2284 return -EOPNOTSUPP;
2285
2286 if (copy_from_user(&range, (struct fstrim_range __user *)arg,
2287 sizeof(range)))
2288 return -EFAULT;
2289
2290 ret = mnt_want_write_file(filp);
2291 if (ret)
2292 return ret;
2293
2294 range.minlen = max((unsigned int)range.minlen,
2295 bdev_discard_granularity(sb->s_bdev));
2296 ret = f2fs_trim_fs(F2FS_SB(sb), &range);
2297 mnt_drop_write_file(filp);
2298 if (ret < 0)
2299 return ret;
2300
2301 if (copy_to_user((struct fstrim_range __user *)arg, &range,
2302 sizeof(range)))
2303 return -EFAULT;
2304 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
2305 return 0;
2306}
2307
2308static bool uuid_is_nonzero(__u8 u[16])
2309{
2310 int i;
2311
2312 for (i = 0; i < 16; i++)
2313 if (u[i])
2314 return true;
2315 return false;
2316}
2317
2318static int f2fs_ioc_set_encryption_policy(struct file *filp, unsigned long arg)
2319{
2320 struct inode *inode = file_inode(filp);
2321
2322 if (!f2fs_sb_has_encrypt(F2FS_I_SB(inode)))
2323 return -EOPNOTSUPP;
2324
2325 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
2326
2327 return fscrypt_ioctl_set_policy(filp, (const void __user *)arg);
2328}
2329
2330static int f2fs_ioc_get_encryption_policy(struct file *filp, unsigned long arg)
2331{
2332 if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp))))
2333 return -EOPNOTSUPP;
2334 return fscrypt_ioctl_get_policy(filp, (void __user *)arg);
2335}
2336
2337static int f2fs_ioc_get_encryption_pwsalt(struct file *filp, unsigned long arg)
2338{
2339 struct inode *inode = file_inode(filp);
2340 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2341 int err;
2342
2343 if (!f2fs_sb_has_encrypt(sbi))
2344 return -EOPNOTSUPP;
2345
2346 err = mnt_want_write_file(filp);
2347 if (err)
2348 return err;
2349
2350 f2fs_down_write(&sbi->sb_lock);
2351
2352 if (uuid_is_nonzero(sbi->raw_super->encrypt_pw_salt))
2353 goto got_it;
2354
2355 /* update superblock with uuid */
2356 generate_random_uuid(sbi->raw_super->encrypt_pw_salt);
2357
2358 err = f2fs_commit_super(sbi, false);
2359 if (err) {
2360 /* undo new data */
2361 memset(sbi->raw_super->encrypt_pw_salt, 0, 16);
2362 goto out_err;
2363 }
2364got_it:
2365 if (copy_to_user((__u8 __user *)arg, sbi->raw_super->encrypt_pw_salt,
2366 16))
2367 err = -EFAULT;
2368out_err:
2369 f2fs_up_write(&sbi->sb_lock);
2370 mnt_drop_write_file(filp);
2371 return err;
2372}
2373
2374static int f2fs_ioc_get_encryption_policy_ex(struct file *filp,
2375 unsigned long arg)
2376{
2377 if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp))))
2378 return -EOPNOTSUPP;
2379
2380 return fscrypt_ioctl_get_policy_ex(filp, (void __user *)arg);
2381}
2382
2383static int f2fs_ioc_add_encryption_key(struct file *filp, unsigned long arg)
2384{
2385 if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp))))
2386 return -EOPNOTSUPP;
2387
2388 return fscrypt_ioctl_add_key(filp, (void __user *)arg);
2389}
2390
2391static int f2fs_ioc_remove_encryption_key(struct file *filp, unsigned long arg)
2392{
2393 if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp))))
2394 return -EOPNOTSUPP;
2395
2396 return fscrypt_ioctl_remove_key(filp, (void __user *)arg);
2397}
2398
2399static int f2fs_ioc_remove_encryption_key_all_users(struct file *filp,
2400 unsigned long arg)
2401{
2402 if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp))))
2403 return -EOPNOTSUPP;
2404
2405 return fscrypt_ioctl_remove_key_all_users(filp, (void __user *)arg);
2406}
2407
2408static int f2fs_ioc_get_encryption_key_status(struct file *filp,
2409 unsigned long arg)
2410{
2411 if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp))))
2412 return -EOPNOTSUPP;
2413
2414 return fscrypt_ioctl_get_key_status(filp, (void __user *)arg);
2415}
2416
2417static int f2fs_ioc_get_encryption_nonce(struct file *filp, unsigned long arg)
2418{
2419 if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp))))
2420 return -EOPNOTSUPP;
2421
2422 return fscrypt_ioctl_get_nonce(filp, (void __user *)arg);
2423}
2424
2425static int f2fs_ioc_gc(struct file *filp, unsigned long arg)
2426{
2427 struct inode *inode = file_inode(filp);
2428 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2429 struct f2fs_gc_control gc_control = { .victim_segno = NULL_SEGNO,
2430 .no_bg_gc = false,
2431 .should_migrate_blocks = false,
2432 .nr_free_secs = 0 };
2433 __u32 sync;
2434 int ret;
2435
2436 if (!capable(CAP_SYS_ADMIN))
2437 return -EPERM;
2438
2439 if (get_user(sync, (__u32 __user *)arg))
2440 return -EFAULT;
2441
2442 if (f2fs_readonly(sbi->sb))
2443 return -EROFS;
2444
2445 ret = mnt_want_write_file(filp);
2446 if (ret)
2447 return ret;
2448
2449 if (!sync) {
2450 if (!f2fs_down_write_trylock(&sbi->gc_lock)) {
2451 ret = -EBUSY;
2452 goto out;
2453 }
2454 } else {
2455 f2fs_down_write(&sbi->gc_lock);
2456 }
2457
2458 gc_control.init_gc_type = sync ? FG_GC : BG_GC;
2459 gc_control.err_gc_skipped = sync;
2460 ret = f2fs_gc(sbi, &gc_control);
2461out:
2462 mnt_drop_write_file(filp);
2463 return ret;
2464}
2465
2466static int __f2fs_ioc_gc_range(struct file *filp, struct f2fs_gc_range *range)
2467{
2468 struct f2fs_sb_info *sbi = F2FS_I_SB(file_inode(filp));
2469 struct f2fs_gc_control gc_control = {
2470 .init_gc_type = range->sync ? FG_GC : BG_GC,
2471 .no_bg_gc = false,
2472 .should_migrate_blocks = false,
2473 .err_gc_skipped = range->sync,
2474 .nr_free_secs = 0 };
2475 u64 end;
2476 int ret;
2477
2478 if (!capable(CAP_SYS_ADMIN))
2479 return -EPERM;
2480 if (f2fs_readonly(sbi->sb))
2481 return -EROFS;
2482
2483 end = range->start + range->len;
2484 if (end < range->start || range->start < MAIN_BLKADDR(sbi) ||
2485 end >= MAX_BLKADDR(sbi))
2486 return -EINVAL;
2487
2488 ret = mnt_want_write_file(filp);
2489 if (ret)
2490 return ret;
2491
2492do_more:
2493 if (!range->sync) {
2494 if (!f2fs_down_write_trylock(&sbi->gc_lock)) {
2495 ret = -EBUSY;
2496 goto out;
2497 }
2498 } else {
2499 f2fs_down_write(&sbi->gc_lock);
2500 }
2501
2502 gc_control.victim_segno = GET_SEGNO(sbi, range->start);
2503 ret = f2fs_gc(sbi, &gc_control);
2504 if (ret) {
2505 if (ret == -EBUSY)
2506 ret = -EAGAIN;
2507 goto out;
2508 }
2509 range->start += CAP_BLKS_PER_SEC(sbi);
2510 if (range->start <= end)
2511 goto do_more;
2512out:
2513 mnt_drop_write_file(filp);
2514 return ret;
2515}
2516
2517static int f2fs_ioc_gc_range(struct file *filp, unsigned long arg)
2518{
2519 struct f2fs_gc_range range;
2520
2521 if (copy_from_user(&range, (struct f2fs_gc_range __user *)arg,
2522 sizeof(range)))
2523 return -EFAULT;
2524 return __f2fs_ioc_gc_range(filp, &range);
2525}
2526
2527static int f2fs_ioc_write_checkpoint(struct file *filp, unsigned long arg)
2528{
2529 struct inode *inode = file_inode(filp);
2530 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2531 int ret;
2532
2533 if (!capable(CAP_SYS_ADMIN))
2534 return -EPERM;
2535
2536 if (f2fs_readonly(sbi->sb))
2537 return -EROFS;
2538
2539 if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
2540 f2fs_info(sbi, "Skipping Checkpoint. Checkpoints currently disabled.");
2541 return -EINVAL;
2542 }
2543
2544 ret = mnt_want_write_file(filp);
2545 if (ret)
2546 return ret;
2547
2548 ret = f2fs_sync_fs(sbi->sb, 1);
2549
2550 mnt_drop_write_file(filp);
2551 return ret;
2552}
2553
2554static int f2fs_defragment_range(struct f2fs_sb_info *sbi,
2555 struct file *filp,
2556 struct f2fs_defragment *range)
2557{
2558 struct inode *inode = file_inode(filp);
2559 struct f2fs_map_blocks map = { .m_next_extent = NULL,
2560 .m_seg_type = NO_CHECK_TYPE,
2561 .m_may_create = false };
2562 struct extent_info ei = {};
2563 pgoff_t pg_start, pg_end, next_pgofs;
2564 unsigned int blk_per_seg = sbi->blocks_per_seg;
2565 unsigned int total = 0, sec_num;
2566 block_t blk_end = 0;
2567 bool fragmented = false;
2568 int err;
2569
2570 pg_start = range->start >> PAGE_SHIFT;
2571 pg_end = (range->start + range->len) >> PAGE_SHIFT;
2572
2573 f2fs_balance_fs(sbi, true);
2574
2575 inode_lock(inode);
2576
2577 /* if in-place-update policy is enabled, don't waste time here */
2578 set_inode_flag(inode, FI_OPU_WRITE);
2579 if (f2fs_should_update_inplace(inode, NULL)) {
2580 err = -EINVAL;
2581 goto out;
2582 }
2583
2584 /* writeback all dirty pages in the range */
2585 err = filemap_write_and_wait_range(inode->i_mapping, range->start,
2586 range->start + range->len - 1);
2587 if (err)
2588 goto out;
2589
2590 /*
2591 * lookup mapping info in extent cache, skip defragmenting if physical
2592 * block addresses are continuous.
2593 */
2594 if (f2fs_lookup_read_extent_cache(inode, pg_start, &ei)) {
2595 if (ei.fofs + ei.len >= pg_end)
2596 goto out;
2597 }
2598
2599 map.m_lblk = pg_start;
2600 map.m_next_pgofs = &next_pgofs;
2601
2602 /*
2603 * lookup mapping info in dnode page cache, skip defragmenting if all
2604 * physical block addresses are continuous even if there are hole(s)
2605 * in logical blocks.
2606 */
2607 while (map.m_lblk < pg_end) {
2608 map.m_len = pg_end - map.m_lblk;
2609 err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_DEFAULT);
2610 if (err)
2611 goto out;
2612
2613 if (!(map.m_flags & F2FS_MAP_FLAGS)) {
2614 map.m_lblk = next_pgofs;
2615 continue;
2616 }
2617
2618 if (blk_end && blk_end != map.m_pblk)
2619 fragmented = true;
2620
2621 /* record total count of block that we're going to move */
2622 total += map.m_len;
2623
2624 blk_end = map.m_pblk + map.m_len;
2625
2626 map.m_lblk += map.m_len;
2627 }
2628
2629 if (!fragmented) {
2630 total = 0;
2631 goto out;
2632 }
2633
2634 sec_num = DIV_ROUND_UP(total, CAP_BLKS_PER_SEC(sbi));
2635
2636 /*
2637 * make sure there are enough free section for LFS allocation, this can
2638 * avoid defragment running in SSR mode when free section are allocated
2639 * intensively
2640 */
2641 if (has_not_enough_free_secs(sbi, 0, sec_num)) {
2642 err = -EAGAIN;
2643 goto out;
2644 }
2645
2646 map.m_lblk = pg_start;
2647 map.m_len = pg_end - pg_start;
2648 total = 0;
2649
2650 while (map.m_lblk < pg_end) {
2651 pgoff_t idx;
2652 int cnt = 0;
2653
2654do_map:
2655 map.m_len = pg_end - map.m_lblk;
2656 err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_DEFAULT);
2657 if (err)
2658 goto clear_out;
2659
2660 if (!(map.m_flags & F2FS_MAP_FLAGS)) {
2661 map.m_lblk = next_pgofs;
2662 goto check;
2663 }
2664
2665 set_inode_flag(inode, FI_SKIP_WRITES);
2666
2667 idx = map.m_lblk;
2668 while (idx < map.m_lblk + map.m_len && cnt < blk_per_seg) {
2669 struct page *page;
2670
2671 page = f2fs_get_lock_data_page(inode, idx, true);
2672 if (IS_ERR(page)) {
2673 err = PTR_ERR(page);
2674 goto clear_out;
2675 }
2676
2677 set_page_dirty(page);
2678 set_page_private_gcing(page);
2679 f2fs_put_page(page, 1);
2680
2681 idx++;
2682 cnt++;
2683 total++;
2684 }
2685
2686 map.m_lblk = idx;
2687check:
2688 if (map.m_lblk < pg_end && cnt < blk_per_seg)
2689 goto do_map;
2690
2691 clear_inode_flag(inode, FI_SKIP_WRITES);
2692
2693 err = filemap_fdatawrite(inode->i_mapping);
2694 if (err)
2695 goto out;
2696 }
2697clear_out:
2698 clear_inode_flag(inode, FI_SKIP_WRITES);
2699out:
2700 clear_inode_flag(inode, FI_OPU_WRITE);
2701 inode_unlock(inode);
2702 if (!err)
2703 range->len = (u64)total << PAGE_SHIFT;
2704 return err;
2705}
2706
2707static int f2fs_ioc_defragment(struct file *filp, unsigned long arg)
2708{
2709 struct inode *inode = file_inode(filp);
2710 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2711 struct f2fs_defragment range;
2712 int err;
2713
2714 if (!capable(CAP_SYS_ADMIN))
2715 return -EPERM;
2716
2717 if (!S_ISREG(inode->i_mode) || f2fs_is_atomic_file(inode))
2718 return -EINVAL;
2719
2720 if (f2fs_readonly(sbi->sb))
2721 return -EROFS;
2722
2723 if (copy_from_user(&range, (struct f2fs_defragment __user *)arg,
2724 sizeof(range)))
2725 return -EFAULT;
2726
2727 /* verify alignment of offset & size */
2728 if (range.start & (F2FS_BLKSIZE - 1) || range.len & (F2FS_BLKSIZE - 1))
2729 return -EINVAL;
2730
2731 if (unlikely((range.start + range.len) >> PAGE_SHIFT >
2732 max_file_blocks(inode)))
2733 return -EINVAL;
2734
2735 err = mnt_want_write_file(filp);
2736 if (err)
2737 return err;
2738
2739 err = f2fs_defragment_range(sbi, filp, &range);
2740 mnt_drop_write_file(filp);
2741
2742 f2fs_update_time(sbi, REQ_TIME);
2743 if (err < 0)
2744 return err;
2745
2746 if (copy_to_user((struct f2fs_defragment __user *)arg, &range,
2747 sizeof(range)))
2748 return -EFAULT;
2749
2750 return 0;
2751}
2752
2753static int f2fs_move_file_range(struct file *file_in, loff_t pos_in,
2754 struct file *file_out, loff_t pos_out, size_t len)
2755{
2756 struct inode *src = file_inode(file_in);
2757 struct inode *dst = file_inode(file_out);
2758 struct f2fs_sb_info *sbi = F2FS_I_SB(src);
2759 size_t olen = len, dst_max_i_size = 0;
2760 size_t dst_osize;
2761 int ret;
2762
2763 if (file_in->f_path.mnt != file_out->f_path.mnt ||
2764 src->i_sb != dst->i_sb)
2765 return -EXDEV;
2766
2767 if (unlikely(f2fs_readonly(src->i_sb)))
2768 return -EROFS;
2769
2770 if (!S_ISREG(src->i_mode) || !S_ISREG(dst->i_mode))
2771 return -EINVAL;
2772
2773 if (IS_ENCRYPTED(src) || IS_ENCRYPTED(dst))
2774 return -EOPNOTSUPP;
2775
2776 if (pos_out < 0 || pos_in < 0)
2777 return -EINVAL;
2778
2779 if (src == dst) {
2780 if (pos_in == pos_out)
2781 return 0;
2782 if (pos_out > pos_in && pos_out < pos_in + len)
2783 return -EINVAL;
2784 }
2785
2786 inode_lock(src);
2787 if (src != dst) {
2788 ret = -EBUSY;
2789 if (!inode_trylock(dst))
2790 goto out;
2791 }
2792
2793 ret = -EINVAL;
2794 if (pos_in + len > src->i_size || pos_in + len < pos_in)
2795 goto out_unlock;
2796 if (len == 0)
2797 olen = len = src->i_size - pos_in;
2798 if (pos_in + len == src->i_size)
2799 len = ALIGN(src->i_size, F2FS_BLKSIZE) - pos_in;
2800 if (len == 0) {
2801 ret = 0;
2802 goto out_unlock;
2803 }
2804
2805 dst_osize = dst->i_size;
2806 if (pos_out + olen > dst->i_size)
2807 dst_max_i_size = pos_out + olen;
2808
2809 /* verify the end result is block aligned */
2810 if (!IS_ALIGNED(pos_in, F2FS_BLKSIZE) ||
2811 !IS_ALIGNED(pos_in + len, F2FS_BLKSIZE) ||
2812 !IS_ALIGNED(pos_out, F2FS_BLKSIZE))
2813 goto out_unlock;
2814
2815 ret = f2fs_convert_inline_inode(src);
2816 if (ret)
2817 goto out_unlock;
2818
2819 ret = f2fs_convert_inline_inode(dst);
2820 if (ret)
2821 goto out_unlock;
2822
2823 /* write out all dirty pages from offset */
2824 ret = filemap_write_and_wait_range(src->i_mapping,
2825 pos_in, pos_in + len);
2826 if (ret)
2827 goto out_unlock;
2828
2829 ret = filemap_write_and_wait_range(dst->i_mapping,
2830 pos_out, pos_out + len);
2831 if (ret)
2832 goto out_unlock;
2833
2834 f2fs_balance_fs(sbi, true);
2835
2836 f2fs_down_write(&F2FS_I(src)->i_gc_rwsem[WRITE]);
2837 if (src != dst) {
2838 ret = -EBUSY;
2839 if (!f2fs_down_write_trylock(&F2FS_I(dst)->i_gc_rwsem[WRITE]))
2840 goto out_src;
2841 }
2842
2843 f2fs_lock_op(sbi);
2844 ret = __exchange_data_block(src, dst, pos_in >> F2FS_BLKSIZE_BITS,
2845 pos_out >> F2FS_BLKSIZE_BITS,
2846 len >> F2FS_BLKSIZE_BITS, false);
2847
2848 if (!ret) {
2849 if (dst_max_i_size)
2850 f2fs_i_size_write(dst, dst_max_i_size);
2851 else if (dst_osize != dst->i_size)
2852 f2fs_i_size_write(dst, dst_osize);
2853 }
2854 f2fs_unlock_op(sbi);
2855
2856 if (src != dst)
2857 f2fs_up_write(&F2FS_I(dst)->i_gc_rwsem[WRITE]);
2858out_src:
2859 f2fs_up_write(&F2FS_I(src)->i_gc_rwsem[WRITE]);
2860out_unlock:
2861 if (src != dst)
2862 inode_unlock(dst);
2863out:
2864 inode_unlock(src);
2865 return ret;
2866}
2867
2868static int __f2fs_ioc_move_range(struct file *filp,
2869 struct f2fs_move_range *range)
2870{
2871 struct fd dst;
2872 int err;
2873
2874 if (!(filp->f_mode & FMODE_READ) ||
2875 !(filp->f_mode & FMODE_WRITE))
2876 return -EBADF;
2877
2878 dst = fdget(range->dst_fd);
2879 if (!dst.file)
2880 return -EBADF;
2881
2882 if (!(dst.file->f_mode & FMODE_WRITE)) {
2883 err = -EBADF;
2884 goto err_out;
2885 }
2886
2887 err = mnt_want_write_file(filp);
2888 if (err)
2889 goto err_out;
2890
2891 err = f2fs_move_file_range(filp, range->pos_in, dst.file,
2892 range->pos_out, range->len);
2893
2894 mnt_drop_write_file(filp);
2895err_out:
2896 fdput(dst);
2897 return err;
2898}
2899
2900static int f2fs_ioc_move_range(struct file *filp, unsigned long arg)
2901{
2902 struct f2fs_move_range range;
2903
2904 if (copy_from_user(&range, (struct f2fs_move_range __user *)arg,
2905 sizeof(range)))
2906 return -EFAULT;
2907 return __f2fs_ioc_move_range(filp, &range);
2908}
2909
2910static int f2fs_ioc_flush_device(struct file *filp, unsigned long arg)
2911{
2912 struct inode *inode = file_inode(filp);
2913 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2914 struct sit_info *sm = SIT_I(sbi);
2915 unsigned int start_segno = 0, end_segno = 0;
2916 unsigned int dev_start_segno = 0, dev_end_segno = 0;
2917 struct f2fs_flush_device range;
2918 struct f2fs_gc_control gc_control = {
2919 .init_gc_type = FG_GC,
2920 .should_migrate_blocks = true,
2921 .err_gc_skipped = true,
2922 .nr_free_secs = 0 };
2923 int ret;
2924
2925 if (!capable(CAP_SYS_ADMIN))
2926 return -EPERM;
2927
2928 if (f2fs_readonly(sbi->sb))
2929 return -EROFS;
2930
2931 if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
2932 return -EINVAL;
2933
2934 if (copy_from_user(&range, (struct f2fs_flush_device __user *)arg,
2935 sizeof(range)))
2936 return -EFAULT;
2937
2938 if (!f2fs_is_multi_device(sbi) || sbi->s_ndevs - 1 <= range.dev_num ||
2939 __is_large_section(sbi)) {
2940 f2fs_warn(sbi, "Can't flush %u in %d for segs_per_sec %u != 1",
2941 range.dev_num, sbi->s_ndevs, sbi->segs_per_sec);
2942 return -EINVAL;
2943 }
2944
2945 ret = mnt_want_write_file(filp);
2946 if (ret)
2947 return ret;
2948
2949 if (range.dev_num != 0)
2950 dev_start_segno = GET_SEGNO(sbi, FDEV(range.dev_num).start_blk);
2951 dev_end_segno = GET_SEGNO(sbi, FDEV(range.dev_num).end_blk);
2952
2953 start_segno = sm->last_victim[FLUSH_DEVICE];
2954 if (start_segno < dev_start_segno || start_segno >= dev_end_segno)
2955 start_segno = dev_start_segno;
2956 end_segno = min(start_segno + range.segments, dev_end_segno);
2957
2958 while (start_segno < end_segno) {
2959 if (!f2fs_down_write_trylock(&sbi->gc_lock)) {
2960 ret = -EBUSY;
2961 goto out;
2962 }
2963 sm->last_victim[GC_CB] = end_segno + 1;
2964 sm->last_victim[GC_GREEDY] = end_segno + 1;
2965 sm->last_victim[ALLOC_NEXT] = end_segno + 1;
2966
2967 gc_control.victim_segno = start_segno;
2968 ret = f2fs_gc(sbi, &gc_control);
2969 if (ret == -EAGAIN)
2970 ret = 0;
2971 else if (ret < 0)
2972 break;
2973 start_segno++;
2974 }
2975out:
2976 mnt_drop_write_file(filp);
2977 return ret;
2978}
2979
2980static int f2fs_ioc_get_features(struct file *filp, unsigned long arg)
2981{
2982 struct inode *inode = file_inode(filp);
2983 u32 sb_feature = le32_to_cpu(F2FS_I_SB(inode)->raw_super->feature);
2984
2985 /* Must validate to set it with SQLite behavior in Android. */
2986 sb_feature |= F2FS_FEATURE_ATOMIC_WRITE;
2987
2988 return put_user(sb_feature, (u32 __user *)arg);
2989}
2990
2991#ifdef CONFIG_QUOTA
2992int f2fs_transfer_project_quota(struct inode *inode, kprojid_t kprojid)
2993{
2994 struct dquot *transfer_to[MAXQUOTAS] = {};
2995 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2996 struct super_block *sb = sbi->sb;
2997 int err = 0;
2998
2999 transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid));
3000 if (!IS_ERR(transfer_to[PRJQUOTA])) {
3001 err = __dquot_transfer(inode, transfer_to);
3002 if (err)
3003 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3004 dqput(transfer_to[PRJQUOTA]);
3005 }
3006 return err;
3007}
3008
3009static int f2fs_ioc_setproject(struct inode *inode, __u32 projid)
3010{
3011 struct f2fs_inode_info *fi = F2FS_I(inode);
3012 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3013 struct f2fs_inode *ri = NULL;
3014 kprojid_t kprojid;
3015 int err;
3016
3017 if (!f2fs_sb_has_project_quota(sbi)) {
3018 if (projid != F2FS_DEF_PROJID)
3019 return -EOPNOTSUPP;
3020 else
3021 return 0;
3022 }
3023
3024 if (!f2fs_has_extra_attr(inode))
3025 return -EOPNOTSUPP;
3026
3027 kprojid = make_kprojid(&init_user_ns, (projid_t)projid);
3028
3029 if (projid_eq(kprojid, fi->i_projid))
3030 return 0;
3031
3032 err = -EPERM;
3033 /* Is it quota file? Do not allow user to mess with it */
3034 if (IS_NOQUOTA(inode))
3035 return err;
3036
3037 if (!F2FS_FITS_IN_INODE(ri, fi->i_extra_isize, i_projid))
3038 return -EOVERFLOW;
3039
3040 err = f2fs_dquot_initialize(inode);
3041 if (err)
3042 return err;
3043
3044 f2fs_lock_op(sbi);
3045 err = f2fs_transfer_project_quota(inode, kprojid);
3046 if (err)
3047 goto out_unlock;
3048
3049 fi->i_projid = kprojid;
3050 inode->i_ctime = current_time(inode);
3051 f2fs_mark_inode_dirty_sync(inode, true);
3052out_unlock:
3053 f2fs_unlock_op(sbi);
3054 return err;
3055}
3056#else
3057int f2fs_transfer_project_quota(struct inode *inode, kprojid_t kprojid)
3058{
3059 return 0;
3060}
3061
3062static int f2fs_ioc_setproject(struct inode *inode, __u32 projid)
3063{
3064 if (projid != F2FS_DEF_PROJID)
3065 return -EOPNOTSUPP;
3066 return 0;
3067}
3068#endif
3069
3070int f2fs_fileattr_get(struct dentry *dentry, struct fileattr *fa)
3071{
3072 struct inode *inode = d_inode(dentry);
3073 struct f2fs_inode_info *fi = F2FS_I(inode);
3074 u32 fsflags = f2fs_iflags_to_fsflags(fi->i_flags);
3075
3076 if (IS_ENCRYPTED(inode))
3077 fsflags |= FS_ENCRYPT_FL;
3078 if (IS_VERITY(inode))
3079 fsflags |= FS_VERITY_FL;
3080 if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode))
3081 fsflags |= FS_INLINE_DATA_FL;
3082 if (is_inode_flag_set(inode, FI_PIN_FILE))
3083 fsflags |= FS_NOCOW_FL;
3084
3085 fileattr_fill_flags(fa, fsflags & F2FS_GETTABLE_FS_FL);
3086
3087 if (f2fs_sb_has_project_quota(F2FS_I_SB(inode)))
3088 fa->fsx_projid = from_kprojid(&init_user_ns, fi->i_projid);
3089
3090 return 0;
3091}
3092
3093int f2fs_fileattr_set(struct user_namespace *mnt_userns,
3094 struct dentry *dentry, struct fileattr *fa)
3095{
3096 struct inode *inode = d_inode(dentry);
3097 u32 fsflags = fa->flags, mask = F2FS_SETTABLE_FS_FL;
3098 u32 iflags;
3099 int err;
3100
3101 if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
3102 return -EIO;
3103 if (!f2fs_is_checkpoint_ready(F2FS_I_SB(inode)))
3104 return -ENOSPC;
3105 if (fsflags & ~F2FS_GETTABLE_FS_FL)
3106 return -EOPNOTSUPP;
3107 fsflags &= F2FS_SETTABLE_FS_FL;
3108 if (!fa->flags_valid)
3109 mask &= FS_COMMON_FL;
3110
3111 iflags = f2fs_fsflags_to_iflags(fsflags);
3112 if (f2fs_mask_flags(inode->i_mode, iflags) != iflags)
3113 return -EOPNOTSUPP;
3114
3115 err = f2fs_setflags_common(inode, iflags, f2fs_fsflags_to_iflags(mask));
3116 if (!err)
3117 err = f2fs_ioc_setproject(inode, fa->fsx_projid);
3118
3119 return err;
3120}
3121
3122int f2fs_pin_file_control(struct inode *inode, bool inc)
3123{
3124 struct f2fs_inode_info *fi = F2FS_I(inode);
3125 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3126
3127 /* Use i_gc_failures for normal file as a risk signal. */
3128 if (inc)
3129 f2fs_i_gc_failures_write(inode,
3130 fi->i_gc_failures[GC_FAILURE_PIN] + 1);
3131
3132 if (fi->i_gc_failures[GC_FAILURE_PIN] > sbi->gc_pin_file_threshold) {
3133 f2fs_warn(sbi, "%s: Enable GC = ino %lx after %x GC trials",
3134 __func__, inode->i_ino,
3135 fi->i_gc_failures[GC_FAILURE_PIN]);
3136 clear_inode_flag(inode, FI_PIN_FILE);
3137 return -EAGAIN;
3138 }
3139 return 0;
3140}
3141
3142static int f2fs_ioc_set_pin_file(struct file *filp, unsigned long arg)
3143{
3144 struct inode *inode = file_inode(filp);
3145 __u32 pin;
3146 int ret = 0;
3147
3148 if (get_user(pin, (__u32 __user *)arg))
3149 return -EFAULT;
3150
3151 if (!S_ISREG(inode->i_mode))
3152 return -EINVAL;
3153
3154 if (f2fs_readonly(F2FS_I_SB(inode)->sb))
3155 return -EROFS;
3156
3157 ret = mnt_want_write_file(filp);
3158 if (ret)
3159 return ret;
3160
3161 inode_lock(inode);
3162
3163 if (!pin) {
3164 clear_inode_flag(inode, FI_PIN_FILE);
3165 f2fs_i_gc_failures_write(inode, 0);
3166 goto done;
3167 }
3168
3169 if (f2fs_should_update_outplace(inode, NULL)) {
3170 ret = -EINVAL;
3171 goto out;
3172 }
3173
3174 if (f2fs_pin_file_control(inode, false)) {
3175 ret = -EAGAIN;
3176 goto out;
3177 }
3178
3179 ret = f2fs_convert_inline_inode(inode);
3180 if (ret)
3181 goto out;
3182
3183 if (!f2fs_disable_compressed_file(inode)) {
3184 ret = -EOPNOTSUPP;
3185 goto out;
3186 }
3187
3188 set_inode_flag(inode, FI_PIN_FILE);
3189 ret = F2FS_I(inode)->i_gc_failures[GC_FAILURE_PIN];
3190done:
3191 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
3192out:
3193 inode_unlock(inode);
3194 mnt_drop_write_file(filp);
3195 return ret;
3196}
3197
3198static int f2fs_ioc_get_pin_file(struct file *filp, unsigned long arg)
3199{
3200 struct inode *inode = file_inode(filp);
3201 __u32 pin = 0;
3202
3203 if (is_inode_flag_set(inode, FI_PIN_FILE))
3204 pin = F2FS_I(inode)->i_gc_failures[GC_FAILURE_PIN];
3205 return put_user(pin, (u32 __user *)arg);
3206}
3207
3208int f2fs_precache_extents(struct inode *inode)
3209{
3210 struct f2fs_inode_info *fi = F2FS_I(inode);
3211 struct f2fs_map_blocks map;
3212 pgoff_t m_next_extent;
3213 loff_t end;
3214 int err;
3215
3216 if (is_inode_flag_set(inode, FI_NO_EXTENT))
3217 return -EOPNOTSUPP;
3218
3219 map.m_lblk = 0;
3220 map.m_next_pgofs = NULL;
3221 map.m_next_extent = &m_next_extent;
3222 map.m_seg_type = NO_CHECK_TYPE;
3223 map.m_may_create = false;
3224 end = max_file_blocks(inode);
3225
3226 while (map.m_lblk < end) {
3227 map.m_len = end - map.m_lblk;
3228
3229 f2fs_down_write(&fi->i_gc_rwsem[WRITE]);
3230 err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_PRECACHE);
3231 f2fs_up_write(&fi->i_gc_rwsem[WRITE]);
3232 if (err)
3233 return err;
3234
3235 map.m_lblk = m_next_extent;
3236 }
3237
3238 return 0;
3239}
3240
3241static int f2fs_ioc_precache_extents(struct file *filp, unsigned long arg)
3242{
3243 return f2fs_precache_extents(file_inode(filp));
3244}
3245
3246static int f2fs_ioc_resize_fs(struct file *filp, unsigned long arg)
3247{
3248 struct f2fs_sb_info *sbi = F2FS_I_SB(file_inode(filp));
3249 __u64 block_count;
3250
3251 if (!capable(CAP_SYS_ADMIN))
3252 return -EPERM;
3253
3254 if (f2fs_readonly(sbi->sb))
3255 return -EROFS;
3256
3257 if (copy_from_user(&block_count, (void __user *)arg,
3258 sizeof(block_count)))
3259 return -EFAULT;
3260
3261 return f2fs_resize_fs(sbi, block_count);
3262}
3263
3264static int f2fs_ioc_enable_verity(struct file *filp, unsigned long arg)
3265{
3266 struct inode *inode = file_inode(filp);
3267
3268 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
3269
3270 if (!f2fs_sb_has_verity(F2FS_I_SB(inode))) {
3271 f2fs_warn(F2FS_I_SB(inode),
3272 "Can't enable fs-verity on inode %lu: the verity feature is not enabled on this filesystem",
3273 inode->i_ino);
3274 return -EOPNOTSUPP;
3275 }
3276
3277 return fsverity_ioctl_enable(filp, (const void __user *)arg);
3278}
3279
3280static int f2fs_ioc_measure_verity(struct file *filp, unsigned long arg)
3281{
3282 if (!f2fs_sb_has_verity(F2FS_I_SB(file_inode(filp))))
3283 return -EOPNOTSUPP;
3284
3285 return fsverity_ioctl_measure(filp, (void __user *)arg);
3286}
3287
3288static int f2fs_ioc_read_verity_metadata(struct file *filp, unsigned long arg)
3289{
3290 if (!f2fs_sb_has_verity(F2FS_I_SB(file_inode(filp))))
3291 return -EOPNOTSUPP;
3292
3293 return fsverity_ioctl_read_metadata(filp, (const void __user *)arg);
3294}
3295
3296static int f2fs_ioc_getfslabel(struct file *filp, unsigned long arg)
3297{
3298 struct inode *inode = file_inode(filp);
3299 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3300 char *vbuf;
3301 int count;
3302 int err = 0;
3303
3304 vbuf = f2fs_kzalloc(sbi, MAX_VOLUME_NAME, GFP_KERNEL);
3305 if (!vbuf)
3306 return -ENOMEM;
3307
3308 f2fs_down_read(&sbi->sb_lock);
3309 count = utf16s_to_utf8s(sbi->raw_super->volume_name,
3310 ARRAY_SIZE(sbi->raw_super->volume_name),
3311 UTF16_LITTLE_ENDIAN, vbuf, MAX_VOLUME_NAME);
3312 f2fs_up_read(&sbi->sb_lock);
3313
3314 if (copy_to_user((char __user *)arg, vbuf,
3315 min(FSLABEL_MAX, count)))
3316 err = -EFAULT;
3317
3318 kfree(vbuf);
3319 return err;
3320}
3321
3322static int f2fs_ioc_setfslabel(struct file *filp, unsigned long arg)
3323{
3324 struct inode *inode = file_inode(filp);
3325 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3326 char *vbuf;
3327 int err = 0;
3328
3329 if (!capable(CAP_SYS_ADMIN))
3330 return -EPERM;
3331
3332 vbuf = strndup_user((const char __user *)arg, FSLABEL_MAX);
3333 if (IS_ERR(vbuf))
3334 return PTR_ERR(vbuf);
3335
3336 err = mnt_want_write_file(filp);
3337 if (err)
3338 goto out;
3339
3340 f2fs_down_write(&sbi->sb_lock);
3341
3342 memset(sbi->raw_super->volume_name, 0,
3343 sizeof(sbi->raw_super->volume_name));
3344 utf8s_to_utf16s(vbuf, strlen(vbuf), UTF16_LITTLE_ENDIAN,
3345 sbi->raw_super->volume_name,
3346 ARRAY_SIZE(sbi->raw_super->volume_name));
3347
3348 err = f2fs_commit_super(sbi, false);
3349
3350 f2fs_up_write(&sbi->sb_lock);
3351
3352 mnt_drop_write_file(filp);
3353out:
3354 kfree(vbuf);
3355 return err;
3356}
3357
3358static int f2fs_get_compress_blocks(struct file *filp, unsigned long arg)
3359{
3360 struct inode *inode = file_inode(filp);
3361 __u64 blocks;
3362
3363 if (!f2fs_sb_has_compression(F2FS_I_SB(inode)))
3364 return -EOPNOTSUPP;
3365
3366 if (!f2fs_compressed_file(inode))
3367 return -EINVAL;
3368
3369 blocks = atomic_read(&F2FS_I(inode)->i_compr_blocks);
3370 return put_user(blocks, (u64 __user *)arg);
3371}
3372
3373static int release_compress_blocks(struct dnode_of_data *dn, pgoff_t count)
3374{
3375 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
3376 unsigned int released_blocks = 0;
3377 int cluster_size = F2FS_I(dn->inode)->i_cluster_size;
3378 block_t blkaddr;
3379 int i;
3380
3381 for (i = 0; i < count; i++) {
3382 blkaddr = data_blkaddr(dn->inode, dn->node_page,
3383 dn->ofs_in_node + i);
3384
3385 if (!__is_valid_data_blkaddr(blkaddr))
3386 continue;
3387 if (unlikely(!f2fs_is_valid_blkaddr(sbi, blkaddr,
3388 DATA_GENERIC_ENHANCE))) {
3389 f2fs_handle_error(sbi, ERROR_INVALID_BLKADDR);
3390 return -EFSCORRUPTED;
3391 }
3392 }
3393
3394 while (count) {
3395 int compr_blocks = 0;
3396
3397 for (i = 0; i < cluster_size; i++, dn->ofs_in_node++) {
3398 blkaddr = f2fs_data_blkaddr(dn);
3399
3400 if (i == 0) {
3401 if (blkaddr == COMPRESS_ADDR)
3402 continue;
3403 dn->ofs_in_node += cluster_size;
3404 goto next;
3405 }
3406
3407 if (__is_valid_data_blkaddr(blkaddr))
3408 compr_blocks++;
3409
3410 if (blkaddr != NEW_ADDR)
3411 continue;
3412
3413 dn->data_blkaddr = NULL_ADDR;
3414 f2fs_set_data_blkaddr(dn);
3415 }
3416
3417 f2fs_i_compr_blocks_update(dn->inode, compr_blocks, false);
3418 dec_valid_block_count(sbi, dn->inode,
3419 cluster_size - compr_blocks);
3420
3421 released_blocks += cluster_size - compr_blocks;
3422next:
3423 count -= cluster_size;
3424 }
3425
3426 return released_blocks;
3427}
3428
3429static int f2fs_release_compress_blocks(struct file *filp, unsigned long arg)
3430{
3431 struct inode *inode = file_inode(filp);
3432 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3433 pgoff_t page_idx = 0, last_idx;
3434 unsigned int released_blocks = 0;
3435 int ret;
3436 int writecount;
3437
3438 if (!f2fs_sb_has_compression(F2FS_I_SB(inode)))
3439 return -EOPNOTSUPP;
3440
3441 if (!f2fs_compressed_file(inode))
3442 return -EINVAL;
3443
3444 if (f2fs_readonly(sbi->sb))
3445 return -EROFS;
3446
3447 ret = mnt_want_write_file(filp);
3448 if (ret)
3449 return ret;
3450
3451 f2fs_balance_fs(F2FS_I_SB(inode), true);
3452
3453 inode_lock(inode);
3454
3455 writecount = atomic_read(&inode->i_writecount);
3456 if ((filp->f_mode & FMODE_WRITE && writecount != 1) ||
3457 (!(filp->f_mode & FMODE_WRITE) && writecount)) {
3458 ret = -EBUSY;
3459 goto out;
3460 }
3461
3462 if (is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) {
3463 ret = -EINVAL;
3464 goto out;
3465 }
3466
3467 ret = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX);
3468 if (ret)
3469 goto out;
3470
3471 set_inode_flag(inode, FI_COMPRESS_RELEASED);
3472 inode->i_ctime = current_time(inode);
3473 f2fs_mark_inode_dirty_sync(inode, true);
3474
3475 if (!atomic_read(&F2FS_I(inode)->i_compr_blocks))
3476 goto out;
3477
3478 f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
3479 filemap_invalidate_lock(inode->i_mapping);
3480
3481 last_idx = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE);
3482
3483 while (page_idx < last_idx) {
3484 struct dnode_of_data dn;
3485 pgoff_t end_offset, count;
3486
3487 set_new_dnode(&dn, inode, NULL, NULL, 0);
3488 ret = f2fs_get_dnode_of_data(&dn, page_idx, LOOKUP_NODE);
3489 if (ret) {
3490 if (ret == -ENOENT) {
3491 page_idx = f2fs_get_next_page_offset(&dn,
3492 page_idx);
3493 ret = 0;
3494 continue;
3495 }
3496 break;
3497 }
3498
3499 end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
3500 count = min(end_offset - dn.ofs_in_node, last_idx - page_idx);
3501 count = round_up(count, F2FS_I(inode)->i_cluster_size);
3502
3503 ret = release_compress_blocks(&dn, count);
3504
3505 f2fs_put_dnode(&dn);
3506
3507 if (ret < 0)
3508 break;
3509
3510 page_idx += count;
3511 released_blocks += ret;
3512 }
3513
3514 filemap_invalidate_unlock(inode->i_mapping);
3515 f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
3516out:
3517 inode_unlock(inode);
3518
3519 mnt_drop_write_file(filp);
3520
3521 if (ret >= 0) {
3522 ret = put_user(released_blocks, (u64 __user *)arg);
3523 } else if (released_blocks &&
3524 atomic_read(&F2FS_I(inode)->i_compr_blocks)) {
3525 set_sbi_flag(sbi, SBI_NEED_FSCK);
3526 f2fs_warn(sbi, "%s: partial blocks were released i_ino=%lx "
3527 "iblocks=%llu, released=%u, compr_blocks=%u, "
3528 "run fsck to fix.",
3529 __func__, inode->i_ino, inode->i_blocks,
3530 released_blocks,
3531 atomic_read(&F2FS_I(inode)->i_compr_blocks));
3532 }
3533
3534 return ret;
3535}
3536
3537static int reserve_compress_blocks(struct dnode_of_data *dn, pgoff_t count)
3538{
3539 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
3540 unsigned int reserved_blocks = 0;
3541 int cluster_size = F2FS_I(dn->inode)->i_cluster_size;
3542 block_t blkaddr;
3543 int i;
3544
3545 for (i = 0; i < count; i++) {
3546 blkaddr = data_blkaddr(dn->inode, dn->node_page,
3547 dn->ofs_in_node + i);
3548
3549 if (!__is_valid_data_blkaddr(blkaddr))
3550 continue;
3551 if (unlikely(!f2fs_is_valid_blkaddr(sbi, blkaddr,
3552 DATA_GENERIC_ENHANCE))) {
3553 f2fs_handle_error(sbi, ERROR_INVALID_BLKADDR);
3554 return -EFSCORRUPTED;
3555 }
3556 }
3557
3558 while (count) {
3559 int compr_blocks = 0;
3560 blkcnt_t reserved;
3561 int ret;
3562
3563 for (i = 0; i < cluster_size; i++, dn->ofs_in_node++) {
3564 blkaddr = f2fs_data_blkaddr(dn);
3565
3566 if (i == 0) {
3567 if (blkaddr == COMPRESS_ADDR)
3568 continue;
3569 dn->ofs_in_node += cluster_size;
3570 goto next;
3571 }
3572
3573 if (__is_valid_data_blkaddr(blkaddr)) {
3574 compr_blocks++;
3575 continue;
3576 }
3577
3578 dn->data_blkaddr = NEW_ADDR;
3579 f2fs_set_data_blkaddr(dn);
3580 }
3581
3582 reserved = cluster_size - compr_blocks;
3583 ret = inc_valid_block_count(sbi, dn->inode, &reserved);
3584 if (ret)
3585 return ret;
3586
3587 if (reserved != cluster_size - compr_blocks)
3588 return -ENOSPC;
3589
3590 f2fs_i_compr_blocks_update(dn->inode, compr_blocks, true);
3591
3592 reserved_blocks += reserved;
3593next:
3594 count -= cluster_size;
3595 }
3596
3597 return reserved_blocks;
3598}
3599
3600static int f2fs_reserve_compress_blocks(struct file *filp, unsigned long arg)
3601{
3602 struct inode *inode = file_inode(filp);
3603 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3604 pgoff_t page_idx = 0, last_idx;
3605 unsigned int reserved_blocks = 0;
3606 int ret;
3607
3608 if (!f2fs_sb_has_compression(F2FS_I_SB(inode)))
3609 return -EOPNOTSUPP;
3610
3611 if (!f2fs_compressed_file(inode))
3612 return -EINVAL;
3613
3614 if (f2fs_readonly(sbi->sb))
3615 return -EROFS;
3616
3617 ret = mnt_want_write_file(filp);
3618 if (ret)
3619 return ret;
3620
3621 if (atomic_read(&F2FS_I(inode)->i_compr_blocks))
3622 goto out;
3623
3624 f2fs_balance_fs(F2FS_I_SB(inode), true);
3625
3626 inode_lock(inode);
3627
3628 if (!is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) {
3629 ret = -EINVAL;
3630 goto unlock_inode;
3631 }
3632
3633 f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
3634 filemap_invalidate_lock(inode->i_mapping);
3635
3636 last_idx = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE);
3637
3638 while (page_idx < last_idx) {
3639 struct dnode_of_data dn;
3640 pgoff_t end_offset, count;
3641
3642 set_new_dnode(&dn, inode, NULL, NULL, 0);
3643 ret = f2fs_get_dnode_of_data(&dn, page_idx, LOOKUP_NODE);
3644 if (ret) {
3645 if (ret == -ENOENT) {
3646 page_idx = f2fs_get_next_page_offset(&dn,
3647 page_idx);
3648 ret = 0;
3649 continue;
3650 }
3651 break;
3652 }
3653
3654 end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
3655 count = min(end_offset - dn.ofs_in_node, last_idx - page_idx);
3656 count = round_up(count, F2FS_I(inode)->i_cluster_size);
3657
3658 ret = reserve_compress_blocks(&dn, count);
3659
3660 f2fs_put_dnode(&dn);
3661
3662 if (ret < 0)
3663 break;
3664
3665 page_idx += count;
3666 reserved_blocks += ret;
3667 }
3668
3669 filemap_invalidate_unlock(inode->i_mapping);
3670 f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
3671
3672 if (ret >= 0) {
3673 clear_inode_flag(inode, FI_COMPRESS_RELEASED);
3674 inode->i_ctime = current_time(inode);
3675 f2fs_mark_inode_dirty_sync(inode, true);
3676 }
3677unlock_inode:
3678 inode_unlock(inode);
3679out:
3680 mnt_drop_write_file(filp);
3681
3682 if (ret >= 0) {
3683 ret = put_user(reserved_blocks, (u64 __user *)arg);
3684 } else if (reserved_blocks &&
3685 atomic_read(&F2FS_I(inode)->i_compr_blocks)) {
3686 set_sbi_flag(sbi, SBI_NEED_FSCK);
3687 f2fs_warn(sbi, "%s: partial blocks were released i_ino=%lx "
3688 "iblocks=%llu, reserved=%u, compr_blocks=%u, "
3689 "run fsck to fix.",
3690 __func__, inode->i_ino, inode->i_blocks,
3691 reserved_blocks,
3692 atomic_read(&F2FS_I(inode)->i_compr_blocks));
3693 }
3694
3695 return ret;
3696}
3697
3698static int f2fs_secure_erase(struct block_device *bdev, struct inode *inode,
3699 pgoff_t off, block_t block, block_t len, u32 flags)
3700{
3701 sector_t sector = SECTOR_FROM_BLOCK(block);
3702 sector_t nr_sects = SECTOR_FROM_BLOCK(len);
3703 int ret = 0;
3704
3705 if (flags & F2FS_TRIM_FILE_DISCARD) {
3706 if (bdev_max_secure_erase_sectors(bdev))
3707 ret = blkdev_issue_secure_erase(bdev, sector, nr_sects,
3708 GFP_NOFS);
3709 else
3710 ret = blkdev_issue_discard(bdev, sector, nr_sects,
3711 GFP_NOFS);
3712 }
3713
3714 if (!ret && (flags & F2FS_TRIM_FILE_ZEROOUT)) {
3715 if (IS_ENCRYPTED(inode))
3716 ret = fscrypt_zeroout_range(inode, off, block, len);
3717 else
3718 ret = blkdev_issue_zeroout(bdev, sector, nr_sects,
3719 GFP_NOFS, 0);
3720 }
3721
3722 return ret;
3723}
3724
3725static int f2fs_sec_trim_file(struct file *filp, unsigned long arg)
3726{
3727 struct inode *inode = file_inode(filp);
3728 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3729 struct address_space *mapping = inode->i_mapping;
3730 struct block_device *prev_bdev = NULL;
3731 struct f2fs_sectrim_range range;
3732 pgoff_t index, pg_end, prev_index = 0;
3733 block_t prev_block = 0, len = 0;
3734 loff_t end_addr;
3735 bool to_end = false;
3736 int ret = 0;
3737
3738 if (!(filp->f_mode & FMODE_WRITE))
3739 return -EBADF;
3740
3741 if (copy_from_user(&range, (struct f2fs_sectrim_range __user *)arg,
3742 sizeof(range)))
3743 return -EFAULT;
3744
3745 if (range.flags == 0 || (range.flags & ~F2FS_TRIM_FILE_MASK) ||
3746 !S_ISREG(inode->i_mode))
3747 return -EINVAL;
3748
3749 if (((range.flags & F2FS_TRIM_FILE_DISCARD) &&
3750 !f2fs_hw_support_discard(sbi)) ||
3751 ((range.flags & F2FS_TRIM_FILE_ZEROOUT) &&
3752 IS_ENCRYPTED(inode) && f2fs_is_multi_device(sbi)))
3753 return -EOPNOTSUPP;
3754
3755 file_start_write(filp);
3756 inode_lock(inode);
3757
3758 if (f2fs_is_atomic_file(inode) || f2fs_compressed_file(inode) ||
3759 range.start >= inode->i_size) {
3760 ret = -EINVAL;
3761 goto err;
3762 }
3763
3764 if (range.len == 0)
3765 goto err;
3766
3767 if (inode->i_size - range.start > range.len) {
3768 end_addr = range.start + range.len;
3769 } else {
3770 end_addr = range.len == (u64)-1 ?
3771 sbi->sb->s_maxbytes : inode->i_size;
3772 to_end = true;
3773 }
3774
3775 if (!IS_ALIGNED(range.start, F2FS_BLKSIZE) ||
3776 (!to_end && !IS_ALIGNED(end_addr, F2FS_BLKSIZE))) {
3777 ret = -EINVAL;
3778 goto err;
3779 }
3780
3781 index = F2FS_BYTES_TO_BLK(range.start);
3782 pg_end = DIV_ROUND_UP(end_addr, F2FS_BLKSIZE);
3783
3784 ret = f2fs_convert_inline_inode(inode);
3785 if (ret)
3786 goto err;
3787
3788 f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
3789 filemap_invalidate_lock(mapping);
3790
3791 ret = filemap_write_and_wait_range(mapping, range.start,
3792 to_end ? LLONG_MAX : end_addr - 1);
3793 if (ret)
3794 goto out;
3795
3796 truncate_inode_pages_range(mapping, range.start,
3797 to_end ? -1 : end_addr - 1);
3798
3799 while (index < pg_end) {
3800 struct dnode_of_data dn;
3801 pgoff_t end_offset, count;
3802 int i;
3803
3804 set_new_dnode(&dn, inode, NULL, NULL, 0);
3805 ret = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE);
3806 if (ret) {
3807 if (ret == -ENOENT) {
3808 index = f2fs_get_next_page_offset(&dn, index);
3809 continue;
3810 }
3811 goto out;
3812 }
3813
3814 end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
3815 count = min(end_offset - dn.ofs_in_node, pg_end - index);
3816 for (i = 0; i < count; i++, index++, dn.ofs_in_node++) {
3817 struct block_device *cur_bdev;
3818 block_t blkaddr = f2fs_data_blkaddr(&dn);
3819
3820 if (!__is_valid_data_blkaddr(blkaddr))
3821 continue;
3822
3823 if (!f2fs_is_valid_blkaddr(sbi, blkaddr,
3824 DATA_GENERIC_ENHANCE)) {
3825 ret = -EFSCORRUPTED;
3826 f2fs_put_dnode(&dn);
3827 f2fs_handle_error(sbi,
3828 ERROR_INVALID_BLKADDR);
3829 goto out;
3830 }
3831
3832 cur_bdev = f2fs_target_device(sbi, blkaddr, NULL);
3833 if (f2fs_is_multi_device(sbi)) {
3834 int di = f2fs_target_device_index(sbi, blkaddr);
3835
3836 blkaddr -= FDEV(di).start_blk;
3837 }
3838
3839 if (len) {
3840 if (prev_bdev == cur_bdev &&
3841 index == prev_index + len &&
3842 blkaddr == prev_block + len) {
3843 len++;
3844 } else {
3845 ret = f2fs_secure_erase(prev_bdev,
3846 inode, prev_index, prev_block,
3847 len, range.flags);
3848 if (ret) {
3849 f2fs_put_dnode(&dn);
3850 goto out;
3851 }
3852
3853 len = 0;
3854 }
3855 }
3856
3857 if (!len) {
3858 prev_bdev = cur_bdev;
3859 prev_index = index;
3860 prev_block = blkaddr;
3861 len = 1;
3862 }
3863 }
3864
3865 f2fs_put_dnode(&dn);
3866
3867 if (fatal_signal_pending(current)) {
3868 ret = -EINTR;
3869 goto out;
3870 }
3871 cond_resched();
3872 }
3873
3874 if (len)
3875 ret = f2fs_secure_erase(prev_bdev, inode, prev_index,
3876 prev_block, len, range.flags);
3877out:
3878 filemap_invalidate_unlock(mapping);
3879 f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
3880err:
3881 inode_unlock(inode);
3882 file_end_write(filp);
3883
3884 return ret;
3885}
3886
3887static int f2fs_ioc_get_compress_option(struct file *filp, unsigned long arg)
3888{
3889 struct inode *inode = file_inode(filp);
3890 struct f2fs_comp_option option;
3891
3892 if (!f2fs_sb_has_compression(F2FS_I_SB(inode)))
3893 return -EOPNOTSUPP;
3894
3895 inode_lock_shared(inode);
3896
3897 if (!f2fs_compressed_file(inode)) {
3898 inode_unlock_shared(inode);
3899 return -ENODATA;
3900 }
3901
3902 option.algorithm = F2FS_I(inode)->i_compress_algorithm;
3903 option.log_cluster_size = F2FS_I(inode)->i_log_cluster_size;
3904
3905 inode_unlock_shared(inode);
3906
3907 if (copy_to_user((struct f2fs_comp_option __user *)arg, &option,
3908 sizeof(option)))
3909 return -EFAULT;
3910
3911 return 0;
3912}
3913
3914static int f2fs_ioc_set_compress_option(struct file *filp, unsigned long arg)
3915{
3916 struct inode *inode = file_inode(filp);
3917 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3918 struct f2fs_comp_option option;
3919 int ret = 0;
3920
3921 if (!f2fs_sb_has_compression(sbi))
3922 return -EOPNOTSUPP;
3923
3924 if (!(filp->f_mode & FMODE_WRITE))
3925 return -EBADF;
3926
3927 if (copy_from_user(&option, (struct f2fs_comp_option __user *)arg,
3928 sizeof(option)))
3929 return -EFAULT;
3930
3931 if (!f2fs_compressed_file(inode) ||
3932 option.log_cluster_size < MIN_COMPRESS_LOG_SIZE ||
3933 option.log_cluster_size > MAX_COMPRESS_LOG_SIZE ||
3934 option.algorithm >= COMPRESS_MAX)
3935 return -EINVAL;
3936
3937 file_start_write(filp);
3938 inode_lock(inode);
3939
3940 if (f2fs_is_mmap_file(inode) || get_dirty_pages(inode)) {
3941 ret = -EBUSY;
3942 goto out;
3943 }
3944
3945 if (inode->i_size != 0) {
3946 ret = -EFBIG;
3947 goto out;
3948 }
3949
3950 F2FS_I(inode)->i_compress_algorithm = option.algorithm;
3951 F2FS_I(inode)->i_log_cluster_size = option.log_cluster_size;
3952 F2FS_I(inode)->i_cluster_size = 1 << option.log_cluster_size;
3953 f2fs_mark_inode_dirty_sync(inode, true);
3954
3955 if (!f2fs_is_compress_backend_ready(inode))
3956 f2fs_warn(sbi, "compression algorithm is successfully set, "
3957 "but current kernel doesn't support this algorithm.");
3958out:
3959 inode_unlock(inode);
3960 file_end_write(filp);
3961
3962 return ret;
3963}
3964
3965static int redirty_blocks(struct inode *inode, pgoff_t page_idx, int len)
3966{
3967 DEFINE_READAHEAD(ractl, NULL, NULL, inode->i_mapping, page_idx);
3968 struct address_space *mapping = inode->i_mapping;
3969 struct page *page;
3970 pgoff_t redirty_idx = page_idx;
3971 int i, page_len = 0, ret = 0;
3972
3973 page_cache_ra_unbounded(&ractl, len, 0);
3974
3975 for (i = 0; i < len; i++, page_idx++) {
3976 page = read_cache_page(mapping, page_idx, NULL, NULL);
3977 if (IS_ERR(page)) {
3978 ret = PTR_ERR(page);
3979 break;
3980 }
3981 page_len++;
3982 }
3983
3984 for (i = 0; i < page_len; i++, redirty_idx++) {
3985 page = find_lock_page(mapping, redirty_idx);
3986
3987 /* It will never fail, when page has pinned above */
3988 f2fs_bug_on(F2FS_I_SB(inode), !page);
3989
3990 set_page_dirty(page);
3991 f2fs_put_page(page, 1);
3992 f2fs_put_page(page, 0);
3993 }
3994
3995 return ret;
3996}
3997
3998static int f2fs_ioc_decompress_file(struct file *filp, unsigned long arg)
3999{
4000 struct inode *inode = file_inode(filp);
4001 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
4002 struct f2fs_inode_info *fi = F2FS_I(inode);
4003 pgoff_t page_idx = 0, last_idx;
4004 unsigned int blk_per_seg = sbi->blocks_per_seg;
4005 int cluster_size = fi->i_cluster_size;
4006 int count, ret;
4007
4008 if (!f2fs_sb_has_compression(sbi) ||
4009 F2FS_OPTION(sbi).compress_mode != COMPR_MODE_USER)
4010 return -EOPNOTSUPP;
4011
4012 if (!(filp->f_mode & FMODE_WRITE))
4013 return -EBADF;
4014
4015 if (!f2fs_compressed_file(inode))
4016 return -EINVAL;
4017
4018 f2fs_balance_fs(F2FS_I_SB(inode), true);
4019
4020 file_start_write(filp);
4021 inode_lock(inode);
4022
4023 if (!f2fs_is_compress_backend_ready(inode)) {
4024 ret = -EOPNOTSUPP;
4025 goto out;
4026 }
4027
4028 if (is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) {
4029 ret = -EINVAL;
4030 goto out;
4031 }
4032
4033 ret = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX);
4034 if (ret)
4035 goto out;
4036
4037 if (!atomic_read(&fi->i_compr_blocks))
4038 goto out;
4039
4040 last_idx = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE);
4041
4042 count = last_idx - page_idx;
4043 while (count) {
4044 int len = min(cluster_size, count);
4045
4046 ret = redirty_blocks(inode, page_idx, len);
4047 if (ret < 0)
4048 break;
4049
4050 if (get_dirty_pages(inode) >= blk_per_seg)
4051 filemap_fdatawrite(inode->i_mapping);
4052
4053 count -= len;
4054 page_idx += len;
4055 }
4056
4057 if (!ret)
4058 ret = filemap_write_and_wait_range(inode->i_mapping, 0,
4059 LLONG_MAX);
4060
4061 if (ret)
4062 f2fs_warn(sbi, "%s: The file might be partially decompressed (errno=%d). Please delete the file.",
4063 __func__, ret);
4064out:
4065 inode_unlock(inode);
4066 file_end_write(filp);
4067
4068 return ret;
4069}
4070
4071static int f2fs_ioc_compress_file(struct file *filp, unsigned long arg)
4072{
4073 struct inode *inode = file_inode(filp);
4074 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
4075 pgoff_t page_idx = 0, last_idx;
4076 unsigned int blk_per_seg = sbi->blocks_per_seg;
4077 int cluster_size = F2FS_I(inode)->i_cluster_size;
4078 int count, ret;
4079
4080 if (!f2fs_sb_has_compression(sbi) ||
4081 F2FS_OPTION(sbi).compress_mode != COMPR_MODE_USER)
4082 return -EOPNOTSUPP;
4083
4084 if (!(filp->f_mode & FMODE_WRITE))
4085 return -EBADF;
4086
4087 if (!f2fs_compressed_file(inode))
4088 return -EINVAL;
4089
4090 f2fs_balance_fs(F2FS_I_SB(inode), true);
4091
4092 file_start_write(filp);
4093 inode_lock(inode);
4094
4095 if (!f2fs_is_compress_backend_ready(inode)) {
4096 ret = -EOPNOTSUPP;
4097 goto out;
4098 }
4099
4100 if (is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) {
4101 ret = -EINVAL;
4102 goto out;
4103 }
4104
4105 ret = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX);
4106 if (ret)
4107 goto out;
4108
4109 set_inode_flag(inode, FI_ENABLE_COMPRESS);
4110
4111 last_idx = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE);
4112
4113 count = last_idx - page_idx;
4114 while (count) {
4115 int len = min(cluster_size, count);
4116
4117 ret = redirty_blocks(inode, page_idx, len);
4118 if (ret < 0)
4119 break;
4120
4121 if (get_dirty_pages(inode) >= blk_per_seg)
4122 filemap_fdatawrite(inode->i_mapping);
4123
4124 count -= len;
4125 page_idx += len;
4126 }
4127
4128 if (!ret)
4129 ret = filemap_write_and_wait_range(inode->i_mapping, 0,
4130 LLONG_MAX);
4131
4132 clear_inode_flag(inode, FI_ENABLE_COMPRESS);
4133
4134 if (ret)
4135 f2fs_warn(sbi, "%s: The file might be partially compressed (errno=%d). Please delete the file.",
4136 __func__, ret);
4137out:
4138 inode_unlock(inode);
4139 file_end_write(filp);
4140
4141 return ret;
4142}
4143
4144static long __f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
4145{
4146 switch (cmd) {
4147 case FS_IOC_GETVERSION:
4148 return f2fs_ioc_getversion(filp, arg);
4149 case F2FS_IOC_START_ATOMIC_WRITE:
4150 return f2fs_ioc_start_atomic_write(filp, false);
4151 case F2FS_IOC_START_ATOMIC_REPLACE:
4152 return f2fs_ioc_start_atomic_write(filp, true);
4153 case F2FS_IOC_COMMIT_ATOMIC_WRITE:
4154 return f2fs_ioc_commit_atomic_write(filp);
4155 case F2FS_IOC_ABORT_ATOMIC_WRITE:
4156 return f2fs_ioc_abort_atomic_write(filp);
4157 case F2FS_IOC_START_VOLATILE_WRITE:
4158 case F2FS_IOC_RELEASE_VOLATILE_WRITE:
4159 return -EOPNOTSUPP;
4160 case F2FS_IOC_SHUTDOWN:
4161 return f2fs_ioc_shutdown(filp, arg);
4162 case FITRIM:
4163 return f2fs_ioc_fitrim(filp, arg);
4164 case FS_IOC_SET_ENCRYPTION_POLICY:
4165 return f2fs_ioc_set_encryption_policy(filp, arg);
4166 case FS_IOC_GET_ENCRYPTION_POLICY:
4167 return f2fs_ioc_get_encryption_policy(filp, arg);
4168 case FS_IOC_GET_ENCRYPTION_PWSALT:
4169 return f2fs_ioc_get_encryption_pwsalt(filp, arg);
4170 case FS_IOC_GET_ENCRYPTION_POLICY_EX:
4171 return f2fs_ioc_get_encryption_policy_ex(filp, arg);
4172 case FS_IOC_ADD_ENCRYPTION_KEY:
4173 return f2fs_ioc_add_encryption_key(filp, arg);
4174 case FS_IOC_REMOVE_ENCRYPTION_KEY:
4175 return f2fs_ioc_remove_encryption_key(filp, arg);
4176 case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
4177 return f2fs_ioc_remove_encryption_key_all_users(filp, arg);
4178 case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
4179 return f2fs_ioc_get_encryption_key_status(filp, arg);
4180 case FS_IOC_GET_ENCRYPTION_NONCE:
4181 return f2fs_ioc_get_encryption_nonce(filp, arg);
4182 case F2FS_IOC_GARBAGE_COLLECT:
4183 return f2fs_ioc_gc(filp, arg);
4184 case F2FS_IOC_GARBAGE_COLLECT_RANGE:
4185 return f2fs_ioc_gc_range(filp, arg);
4186 case F2FS_IOC_WRITE_CHECKPOINT:
4187 return f2fs_ioc_write_checkpoint(filp, arg);
4188 case F2FS_IOC_DEFRAGMENT:
4189 return f2fs_ioc_defragment(filp, arg);
4190 case F2FS_IOC_MOVE_RANGE:
4191 return f2fs_ioc_move_range(filp, arg);
4192 case F2FS_IOC_FLUSH_DEVICE:
4193 return f2fs_ioc_flush_device(filp, arg);
4194 case F2FS_IOC_GET_FEATURES:
4195 return f2fs_ioc_get_features(filp, arg);
4196 case F2FS_IOC_GET_PIN_FILE:
4197 return f2fs_ioc_get_pin_file(filp, arg);
4198 case F2FS_IOC_SET_PIN_FILE:
4199 return f2fs_ioc_set_pin_file(filp, arg);
4200 case F2FS_IOC_PRECACHE_EXTENTS:
4201 return f2fs_ioc_precache_extents(filp, arg);
4202 case F2FS_IOC_RESIZE_FS:
4203 return f2fs_ioc_resize_fs(filp, arg);
4204 case FS_IOC_ENABLE_VERITY:
4205 return f2fs_ioc_enable_verity(filp, arg);
4206 case FS_IOC_MEASURE_VERITY:
4207 return f2fs_ioc_measure_verity(filp, arg);
4208 case FS_IOC_READ_VERITY_METADATA:
4209 return f2fs_ioc_read_verity_metadata(filp, arg);
4210 case FS_IOC_GETFSLABEL:
4211 return f2fs_ioc_getfslabel(filp, arg);
4212 case FS_IOC_SETFSLABEL:
4213 return f2fs_ioc_setfslabel(filp, arg);
4214 case F2FS_IOC_GET_COMPRESS_BLOCKS:
4215 return f2fs_get_compress_blocks(filp, arg);
4216 case F2FS_IOC_RELEASE_COMPRESS_BLOCKS:
4217 return f2fs_release_compress_blocks(filp, arg);
4218 case F2FS_IOC_RESERVE_COMPRESS_BLOCKS:
4219 return f2fs_reserve_compress_blocks(filp, arg);
4220 case F2FS_IOC_SEC_TRIM_FILE:
4221 return f2fs_sec_trim_file(filp, arg);
4222 case F2FS_IOC_GET_COMPRESS_OPTION:
4223 return f2fs_ioc_get_compress_option(filp, arg);
4224 case F2FS_IOC_SET_COMPRESS_OPTION:
4225 return f2fs_ioc_set_compress_option(filp, arg);
4226 case F2FS_IOC_DECOMPRESS_FILE:
4227 return f2fs_ioc_decompress_file(filp, arg);
4228 case F2FS_IOC_COMPRESS_FILE:
4229 return f2fs_ioc_compress_file(filp, arg);
4230 default:
4231 return -ENOTTY;
4232 }
4233}
4234
4235long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
4236{
4237 if (unlikely(f2fs_cp_error(F2FS_I_SB(file_inode(filp)))))
4238 return -EIO;
4239 if (!f2fs_is_checkpoint_ready(F2FS_I_SB(file_inode(filp))))
4240 return -ENOSPC;
4241
4242 return __f2fs_ioctl(filp, cmd, arg);
4243}
4244
4245/*
4246 * Return %true if the given read or write request should use direct I/O, or
4247 * %false if it should use buffered I/O.
4248 */
4249static bool f2fs_should_use_dio(struct inode *inode, struct kiocb *iocb,
4250 struct iov_iter *iter)
4251{
4252 unsigned int align;
4253
4254 if (!(iocb->ki_flags & IOCB_DIRECT))
4255 return false;
4256
4257 if (f2fs_force_buffered_io(inode, iov_iter_rw(iter)))
4258 return false;
4259
4260 /*
4261 * Direct I/O not aligned to the disk's logical_block_size will be
4262 * attempted, but will fail with -EINVAL.
4263 *
4264 * f2fs additionally requires that direct I/O be aligned to the
4265 * filesystem block size, which is often a stricter requirement.
4266 * However, f2fs traditionally falls back to buffered I/O on requests
4267 * that are logical_block_size-aligned but not fs-block aligned.
4268 *
4269 * The below logic implements this behavior.
4270 */
4271 align = iocb->ki_pos | iov_iter_alignment(iter);
4272 if (!IS_ALIGNED(align, i_blocksize(inode)) &&
4273 IS_ALIGNED(align, bdev_logical_block_size(inode->i_sb->s_bdev)))
4274 return false;
4275
4276 return true;
4277}
4278
4279static int f2fs_dio_read_end_io(struct kiocb *iocb, ssize_t size, int error,
4280 unsigned int flags)
4281{
4282 struct f2fs_sb_info *sbi = F2FS_I_SB(file_inode(iocb->ki_filp));
4283
4284 dec_page_count(sbi, F2FS_DIO_READ);
4285 if (error)
4286 return error;
4287 f2fs_update_iostat(sbi, NULL, APP_DIRECT_READ_IO, size);
4288 return 0;
4289}
4290
4291static const struct iomap_dio_ops f2fs_iomap_dio_read_ops = {
4292 .end_io = f2fs_dio_read_end_io,
4293};
4294
4295static ssize_t f2fs_dio_read_iter(struct kiocb *iocb, struct iov_iter *to)
4296{
4297 struct file *file = iocb->ki_filp;
4298 struct inode *inode = file_inode(file);
4299 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
4300 struct f2fs_inode_info *fi = F2FS_I(inode);
4301 const loff_t pos = iocb->ki_pos;
4302 const size_t count = iov_iter_count(to);
4303 struct iomap_dio *dio;
4304 ssize_t ret;
4305
4306 if (count == 0)
4307 return 0; /* skip atime update */
4308
4309 trace_f2fs_direct_IO_enter(inode, iocb, count, READ);
4310
4311 if (iocb->ki_flags & IOCB_NOWAIT) {
4312 if (!f2fs_down_read_trylock(&fi->i_gc_rwsem[READ])) {
4313 ret = -EAGAIN;
4314 goto out;
4315 }
4316 } else {
4317 f2fs_down_read(&fi->i_gc_rwsem[READ]);
4318 }
4319
4320 /*
4321 * We have to use __iomap_dio_rw() and iomap_dio_complete() instead of
4322 * the higher-level function iomap_dio_rw() in order to ensure that the
4323 * F2FS_DIO_READ counter will be decremented correctly in all cases.
4324 */
4325 inc_page_count(sbi, F2FS_DIO_READ);
4326 dio = __iomap_dio_rw(iocb, to, &f2fs_iomap_ops,
4327 &f2fs_iomap_dio_read_ops, 0, NULL, 0);
4328 if (IS_ERR_OR_NULL(dio)) {
4329 ret = PTR_ERR_OR_ZERO(dio);
4330 if (ret != -EIOCBQUEUED)
4331 dec_page_count(sbi, F2FS_DIO_READ);
4332 } else {
4333 ret = iomap_dio_complete(dio);
4334 }
4335
4336 f2fs_up_read(&fi->i_gc_rwsem[READ]);
4337
4338 file_accessed(file);
4339out:
4340 trace_f2fs_direct_IO_exit(inode, pos, count, READ, ret);
4341 return ret;
4342}
4343
4344static ssize_t f2fs_file_read_iter(struct kiocb *iocb, struct iov_iter *to)
4345{
4346 struct inode *inode = file_inode(iocb->ki_filp);
4347 const loff_t pos = iocb->ki_pos;
4348 ssize_t ret;
4349
4350 if (!f2fs_is_compress_backend_ready(inode))
4351 return -EOPNOTSUPP;
4352
4353 if (trace_f2fs_dataread_start_enabled()) {
4354 char *p = f2fs_kmalloc(F2FS_I_SB(inode), PATH_MAX, GFP_KERNEL);
4355 char *path;
4356
4357 if (!p)
4358 goto skip_read_trace;
4359
4360 path = dentry_path_raw(file_dentry(iocb->ki_filp), p, PATH_MAX);
4361 if (IS_ERR(path)) {
4362 kfree(p);
4363 goto skip_read_trace;
4364 }
4365
4366 trace_f2fs_dataread_start(inode, pos, iov_iter_count(to),
4367 current->pid, path, current->comm);
4368 kfree(p);
4369 }
4370skip_read_trace:
4371 if (f2fs_should_use_dio(inode, iocb, to)) {
4372 ret = f2fs_dio_read_iter(iocb, to);
4373 } else {
4374 ret = filemap_read(iocb, to, 0);
4375 if (ret > 0)
4376 f2fs_update_iostat(F2FS_I_SB(inode), inode,
4377 APP_BUFFERED_READ_IO, ret);
4378 }
4379 if (trace_f2fs_dataread_end_enabled())
4380 trace_f2fs_dataread_end(inode, pos, ret);
4381 return ret;
4382}
4383
4384static ssize_t f2fs_write_checks(struct kiocb *iocb, struct iov_iter *from)
4385{
4386 struct file *file = iocb->ki_filp;
4387 struct inode *inode = file_inode(file);
4388 ssize_t count;
4389 int err;
4390
4391 if (IS_IMMUTABLE(inode))
4392 return -EPERM;
4393
4394 if (is_inode_flag_set(inode, FI_COMPRESS_RELEASED))
4395 return -EPERM;
4396
4397 count = generic_write_checks(iocb, from);
4398 if (count <= 0)
4399 return count;
4400
4401 err = file_modified(file);
4402 if (err)
4403 return err;
4404 return count;
4405}
4406
4407/*
4408 * Preallocate blocks for a write request, if it is possible and helpful to do
4409 * so. Returns a positive number if blocks may have been preallocated, 0 if no
4410 * blocks were preallocated, or a negative errno value if something went
4411 * seriously wrong. Also sets FI_PREALLOCATED_ALL on the inode if *all* the
4412 * requested blocks (not just some of them) have been allocated.
4413 */
4414static int f2fs_preallocate_blocks(struct kiocb *iocb, struct iov_iter *iter,
4415 bool dio)
4416{
4417 struct inode *inode = file_inode(iocb->ki_filp);
4418 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
4419 const loff_t pos = iocb->ki_pos;
4420 const size_t count = iov_iter_count(iter);
4421 struct f2fs_map_blocks map = {};
4422 int flag;
4423 int ret;
4424
4425 /* If it will be an out-of-place direct write, don't bother. */
4426 if (dio && f2fs_lfs_mode(sbi))
4427 return 0;
4428 /*
4429 * Don't preallocate holes aligned to DIO_SKIP_HOLES which turns into
4430 * buffered IO, if DIO meets any holes.
4431 */
4432 if (dio && i_size_read(inode) &&
4433 (F2FS_BYTES_TO_BLK(pos) < F2FS_BLK_ALIGN(i_size_read(inode))))
4434 return 0;
4435
4436 /* No-wait I/O can't allocate blocks. */
4437 if (iocb->ki_flags & IOCB_NOWAIT)
4438 return 0;
4439
4440 /* If it will be a short write, don't bother. */
4441 if (fault_in_iov_iter_readable(iter, count))
4442 return 0;
4443
4444 if (f2fs_has_inline_data(inode)) {
4445 /* If the data will fit inline, don't bother. */
4446 if (pos + count <= MAX_INLINE_DATA(inode))
4447 return 0;
4448 ret = f2fs_convert_inline_inode(inode);
4449 if (ret)
4450 return ret;
4451 }
4452
4453 /* Do not preallocate blocks that will be written partially in 4KB. */
4454 map.m_lblk = F2FS_BLK_ALIGN(pos);
4455 map.m_len = F2FS_BYTES_TO_BLK(pos + count);
4456 if (map.m_len > map.m_lblk)
4457 map.m_len -= map.m_lblk;
4458 else
4459 map.m_len = 0;
4460 map.m_may_create = true;
4461 if (dio) {
4462 map.m_seg_type = f2fs_rw_hint_to_seg_type(inode->i_write_hint);
4463 flag = F2FS_GET_BLOCK_PRE_DIO;
4464 } else {
4465 map.m_seg_type = NO_CHECK_TYPE;
4466 flag = F2FS_GET_BLOCK_PRE_AIO;
4467 }
4468
4469 ret = f2fs_map_blocks(inode, &map, 1, flag);
4470 /* -ENOSPC|-EDQUOT are fine to report the number of allocated blocks. */
4471 if (ret < 0 && !((ret == -ENOSPC || ret == -EDQUOT) && map.m_len > 0))
4472 return ret;
4473 if (ret == 0)
4474 set_inode_flag(inode, FI_PREALLOCATED_ALL);
4475 return map.m_len;
4476}
4477
4478static ssize_t f2fs_buffered_write_iter(struct kiocb *iocb,
4479 struct iov_iter *from)
4480{
4481 struct file *file = iocb->ki_filp;
4482 struct inode *inode = file_inode(file);
4483 ssize_t ret;
4484
4485 if (iocb->ki_flags & IOCB_NOWAIT)
4486 return -EOPNOTSUPP;
4487
4488 current->backing_dev_info = inode_to_bdi(inode);
4489 ret = generic_perform_write(iocb, from);
4490 current->backing_dev_info = NULL;
4491
4492 if (ret > 0) {
4493 iocb->ki_pos += ret;
4494 f2fs_update_iostat(F2FS_I_SB(inode), inode,
4495 APP_BUFFERED_IO, ret);
4496 }
4497 return ret;
4498}
4499
4500static int f2fs_dio_write_end_io(struct kiocb *iocb, ssize_t size, int error,
4501 unsigned int flags)
4502{
4503 struct f2fs_sb_info *sbi = F2FS_I_SB(file_inode(iocb->ki_filp));
4504
4505 dec_page_count(sbi, F2FS_DIO_WRITE);
4506 if (error)
4507 return error;
4508 f2fs_update_iostat(sbi, NULL, APP_DIRECT_IO, size);
4509 return 0;
4510}
4511
4512static const struct iomap_dio_ops f2fs_iomap_dio_write_ops = {
4513 .end_io = f2fs_dio_write_end_io,
4514};
4515
4516static ssize_t f2fs_dio_write_iter(struct kiocb *iocb, struct iov_iter *from,
4517 bool *may_need_sync)
4518{
4519 struct file *file = iocb->ki_filp;
4520 struct inode *inode = file_inode(file);
4521 struct f2fs_inode_info *fi = F2FS_I(inode);
4522 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
4523 const bool do_opu = f2fs_lfs_mode(sbi);
4524 const loff_t pos = iocb->ki_pos;
4525 const ssize_t count = iov_iter_count(from);
4526 unsigned int dio_flags;
4527 struct iomap_dio *dio;
4528 ssize_t ret;
4529
4530 trace_f2fs_direct_IO_enter(inode, iocb, count, WRITE);
4531
4532 if (iocb->ki_flags & IOCB_NOWAIT) {
4533 /* f2fs_convert_inline_inode() and block allocation can block */
4534 if (f2fs_has_inline_data(inode) ||
4535 !f2fs_overwrite_io(inode, pos, count)) {
4536 ret = -EAGAIN;
4537 goto out;
4538 }
4539
4540 if (!f2fs_down_read_trylock(&fi->i_gc_rwsem[WRITE])) {
4541 ret = -EAGAIN;
4542 goto out;
4543 }
4544 if (do_opu && !f2fs_down_read_trylock(&fi->i_gc_rwsem[READ])) {
4545 f2fs_up_read(&fi->i_gc_rwsem[WRITE]);
4546 ret = -EAGAIN;
4547 goto out;
4548 }
4549 } else {
4550 ret = f2fs_convert_inline_inode(inode);
4551 if (ret)
4552 goto out;
4553
4554 f2fs_down_read(&fi->i_gc_rwsem[WRITE]);
4555 if (do_opu)
4556 f2fs_down_read(&fi->i_gc_rwsem[READ]);
4557 }
4558
4559 /*
4560 * We have to use __iomap_dio_rw() and iomap_dio_complete() instead of
4561 * the higher-level function iomap_dio_rw() in order to ensure that the
4562 * F2FS_DIO_WRITE counter will be decremented correctly in all cases.
4563 */
4564 inc_page_count(sbi, F2FS_DIO_WRITE);
4565 dio_flags = 0;
4566 if (pos + count > inode->i_size)
4567 dio_flags |= IOMAP_DIO_FORCE_WAIT;
4568 dio = __iomap_dio_rw(iocb, from, &f2fs_iomap_ops,
4569 &f2fs_iomap_dio_write_ops, dio_flags, NULL, 0);
4570 if (IS_ERR_OR_NULL(dio)) {
4571 ret = PTR_ERR_OR_ZERO(dio);
4572 if (ret == -ENOTBLK)
4573 ret = 0;
4574 if (ret != -EIOCBQUEUED)
4575 dec_page_count(sbi, F2FS_DIO_WRITE);
4576 } else {
4577 ret = iomap_dio_complete(dio);
4578 }
4579
4580 if (do_opu)
4581 f2fs_up_read(&fi->i_gc_rwsem[READ]);
4582 f2fs_up_read(&fi->i_gc_rwsem[WRITE]);
4583
4584 if (ret < 0)
4585 goto out;
4586 if (pos + ret > inode->i_size)
4587 f2fs_i_size_write(inode, pos + ret);
4588 if (!do_opu)
4589 set_inode_flag(inode, FI_UPDATE_WRITE);
4590
4591 if (iov_iter_count(from)) {
4592 ssize_t ret2;
4593 loff_t bufio_start_pos = iocb->ki_pos;
4594
4595 /*
4596 * The direct write was partial, so we need to fall back to a
4597 * buffered write for the remainder.
4598 */
4599
4600 ret2 = f2fs_buffered_write_iter(iocb, from);
4601 if (iov_iter_count(from))
4602 f2fs_write_failed(inode, iocb->ki_pos);
4603 if (ret2 < 0)
4604 goto out;
4605
4606 /*
4607 * Ensure that the pagecache pages are written to disk and
4608 * invalidated to preserve the expected O_DIRECT semantics.
4609 */
4610 if (ret2 > 0) {
4611 loff_t bufio_end_pos = bufio_start_pos + ret2 - 1;
4612
4613 ret += ret2;
4614
4615 ret2 = filemap_write_and_wait_range(file->f_mapping,
4616 bufio_start_pos,
4617 bufio_end_pos);
4618 if (ret2 < 0)
4619 goto out;
4620 invalidate_mapping_pages(file->f_mapping,
4621 bufio_start_pos >> PAGE_SHIFT,
4622 bufio_end_pos >> PAGE_SHIFT);
4623 }
4624 } else {
4625 /* iomap_dio_rw() already handled the generic_write_sync(). */
4626 *may_need_sync = false;
4627 }
4628out:
4629 trace_f2fs_direct_IO_exit(inode, pos, count, WRITE, ret);
4630 return ret;
4631}
4632
4633static ssize_t f2fs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
4634{
4635 struct inode *inode = file_inode(iocb->ki_filp);
4636 const loff_t orig_pos = iocb->ki_pos;
4637 const size_t orig_count = iov_iter_count(from);
4638 loff_t target_size;
4639 bool dio;
4640 bool may_need_sync = true;
4641 int preallocated;
4642 ssize_t ret;
4643
4644 if (unlikely(f2fs_cp_error(F2FS_I_SB(inode)))) {
4645 ret = -EIO;
4646 goto out;
4647 }
4648
4649 if (!f2fs_is_compress_backend_ready(inode)) {
4650 ret = -EOPNOTSUPP;
4651 goto out;
4652 }
4653
4654 if (iocb->ki_flags & IOCB_NOWAIT) {
4655 if (!inode_trylock(inode)) {
4656 ret = -EAGAIN;
4657 goto out;
4658 }
4659 } else {
4660 inode_lock(inode);
4661 }
4662
4663 ret = f2fs_write_checks(iocb, from);
4664 if (ret <= 0)
4665 goto out_unlock;
4666
4667 /* Determine whether we will do a direct write or a buffered write. */
4668 dio = f2fs_should_use_dio(inode, iocb, from);
4669
4670 /* Possibly preallocate the blocks for the write. */
4671 target_size = iocb->ki_pos + iov_iter_count(from);
4672 preallocated = f2fs_preallocate_blocks(iocb, from, dio);
4673 if (preallocated < 0) {
4674 ret = preallocated;
4675 } else {
4676 if (trace_f2fs_datawrite_start_enabled()) {
4677 char *p = f2fs_kmalloc(F2FS_I_SB(inode),
4678 PATH_MAX, GFP_KERNEL);
4679 char *path;
4680
4681 if (!p)
4682 goto skip_write_trace;
4683 path = dentry_path_raw(file_dentry(iocb->ki_filp),
4684 p, PATH_MAX);
4685 if (IS_ERR(path)) {
4686 kfree(p);
4687 goto skip_write_trace;
4688 }
4689 trace_f2fs_datawrite_start(inode, orig_pos, orig_count,
4690 current->pid, path, current->comm);
4691 kfree(p);
4692 }
4693skip_write_trace:
4694 /* Do the actual write. */
4695 ret = dio ?
4696 f2fs_dio_write_iter(iocb, from, &may_need_sync) :
4697 f2fs_buffered_write_iter(iocb, from);
4698
4699 if (trace_f2fs_datawrite_end_enabled())
4700 trace_f2fs_datawrite_end(inode, orig_pos, ret);
4701 }
4702
4703 /* Don't leave any preallocated blocks around past i_size. */
4704 if (preallocated && i_size_read(inode) < target_size) {
4705 f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
4706 filemap_invalidate_lock(inode->i_mapping);
4707 if (!f2fs_truncate(inode))
4708 file_dont_truncate(inode);
4709 filemap_invalidate_unlock(inode->i_mapping);
4710 f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
4711 } else {
4712 file_dont_truncate(inode);
4713 }
4714
4715 clear_inode_flag(inode, FI_PREALLOCATED_ALL);
4716out_unlock:
4717 inode_unlock(inode);
4718out:
4719 trace_f2fs_file_write_iter(inode, orig_pos, orig_count, ret);
4720 if (ret > 0 && may_need_sync)
4721 ret = generic_write_sync(iocb, ret);
4722 return ret;
4723}
4724
4725static int f2fs_file_fadvise(struct file *filp, loff_t offset, loff_t len,
4726 int advice)
4727{
4728 struct address_space *mapping;
4729 struct backing_dev_info *bdi;
4730 struct inode *inode = file_inode(filp);
4731 int err;
4732
4733 if (advice == POSIX_FADV_SEQUENTIAL) {
4734 if (S_ISFIFO(inode->i_mode))
4735 return -ESPIPE;
4736
4737 mapping = filp->f_mapping;
4738 if (!mapping || len < 0)
4739 return -EINVAL;
4740
4741 bdi = inode_to_bdi(mapping->host);
4742 filp->f_ra.ra_pages = bdi->ra_pages *
4743 F2FS_I_SB(inode)->seq_file_ra_mul;
4744 spin_lock(&filp->f_lock);
4745 filp->f_mode &= ~FMODE_RANDOM;
4746 spin_unlock(&filp->f_lock);
4747 return 0;
4748 }
4749
4750 err = generic_fadvise(filp, offset, len, advice);
4751 if (!err && advice == POSIX_FADV_DONTNEED &&
4752 test_opt(F2FS_I_SB(inode), COMPRESS_CACHE) &&
4753 f2fs_compressed_file(inode))
4754 f2fs_invalidate_compress_pages(F2FS_I_SB(inode), inode->i_ino);
4755
4756 return err;
4757}
4758
4759#ifdef CONFIG_COMPAT
4760struct compat_f2fs_gc_range {
4761 u32 sync;
4762 compat_u64 start;
4763 compat_u64 len;
4764};
4765#define F2FS_IOC32_GARBAGE_COLLECT_RANGE _IOW(F2FS_IOCTL_MAGIC, 11,\
4766 struct compat_f2fs_gc_range)
4767
4768static int f2fs_compat_ioc_gc_range(struct file *file, unsigned long arg)
4769{
4770 struct compat_f2fs_gc_range __user *urange;
4771 struct f2fs_gc_range range;
4772 int err;
4773
4774 urange = compat_ptr(arg);
4775 err = get_user(range.sync, &urange->sync);
4776 err |= get_user(range.start, &urange->start);
4777 err |= get_user(range.len, &urange->len);
4778 if (err)
4779 return -EFAULT;
4780
4781 return __f2fs_ioc_gc_range(file, &range);
4782}
4783
4784struct compat_f2fs_move_range {
4785 u32 dst_fd;
4786 compat_u64 pos_in;
4787 compat_u64 pos_out;
4788 compat_u64 len;
4789};
4790#define F2FS_IOC32_MOVE_RANGE _IOWR(F2FS_IOCTL_MAGIC, 9, \
4791 struct compat_f2fs_move_range)
4792
4793static int f2fs_compat_ioc_move_range(struct file *file, unsigned long arg)
4794{
4795 struct compat_f2fs_move_range __user *urange;
4796 struct f2fs_move_range range;
4797 int err;
4798
4799 urange = compat_ptr(arg);
4800 err = get_user(range.dst_fd, &urange->dst_fd);
4801 err |= get_user(range.pos_in, &urange->pos_in);
4802 err |= get_user(range.pos_out, &urange->pos_out);
4803 err |= get_user(range.len, &urange->len);
4804 if (err)
4805 return -EFAULT;
4806
4807 return __f2fs_ioc_move_range(file, &range);
4808}
4809
4810long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
4811{
4812 if (unlikely(f2fs_cp_error(F2FS_I_SB(file_inode(file)))))
4813 return -EIO;
4814 if (!f2fs_is_checkpoint_ready(F2FS_I_SB(file_inode(file))))
4815 return -ENOSPC;
4816
4817 switch (cmd) {
4818 case FS_IOC32_GETVERSION:
4819 cmd = FS_IOC_GETVERSION;
4820 break;
4821 case F2FS_IOC32_GARBAGE_COLLECT_RANGE:
4822 return f2fs_compat_ioc_gc_range(file, arg);
4823 case F2FS_IOC32_MOVE_RANGE:
4824 return f2fs_compat_ioc_move_range(file, arg);
4825 case F2FS_IOC_START_ATOMIC_WRITE:
4826 case F2FS_IOC_COMMIT_ATOMIC_WRITE:
4827 case F2FS_IOC_START_VOLATILE_WRITE:
4828 case F2FS_IOC_RELEASE_VOLATILE_WRITE:
4829 case F2FS_IOC_ABORT_ATOMIC_WRITE:
4830 case F2FS_IOC_SHUTDOWN:
4831 case FITRIM:
4832 case FS_IOC_SET_ENCRYPTION_POLICY:
4833 case FS_IOC_GET_ENCRYPTION_PWSALT:
4834 case FS_IOC_GET_ENCRYPTION_POLICY:
4835 case FS_IOC_GET_ENCRYPTION_POLICY_EX:
4836 case FS_IOC_ADD_ENCRYPTION_KEY:
4837 case FS_IOC_REMOVE_ENCRYPTION_KEY:
4838 case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
4839 case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
4840 case FS_IOC_GET_ENCRYPTION_NONCE:
4841 case F2FS_IOC_GARBAGE_COLLECT:
4842 case F2FS_IOC_WRITE_CHECKPOINT:
4843 case F2FS_IOC_DEFRAGMENT:
4844 case F2FS_IOC_FLUSH_DEVICE:
4845 case F2FS_IOC_GET_FEATURES:
4846 case F2FS_IOC_GET_PIN_FILE:
4847 case F2FS_IOC_SET_PIN_FILE:
4848 case F2FS_IOC_PRECACHE_EXTENTS:
4849 case F2FS_IOC_RESIZE_FS:
4850 case FS_IOC_ENABLE_VERITY:
4851 case FS_IOC_MEASURE_VERITY:
4852 case FS_IOC_READ_VERITY_METADATA:
4853 case FS_IOC_GETFSLABEL:
4854 case FS_IOC_SETFSLABEL:
4855 case F2FS_IOC_GET_COMPRESS_BLOCKS:
4856 case F2FS_IOC_RELEASE_COMPRESS_BLOCKS:
4857 case F2FS_IOC_RESERVE_COMPRESS_BLOCKS:
4858 case F2FS_IOC_SEC_TRIM_FILE:
4859 case F2FS_IOC_GET_COMPRESS_OPTION:
4860 case F2FS_IOC_SET_COMPRESS_OPTION:
4861 case F2FS_IOC_DECOMPRESS_FILE:
4862 case F2FS_IOC_COMPRESS_FILE:
4863 break;
4864 default:
4865 return -ENOIOCTLCMD;
4866 }
4867 return __f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
4868}
4869#endif
4870
4871const struct file_operations f2fs_file_operations = {
4872 .llseek = f2fs_llseek,
4873 .read_iter = f2fs_file_read_iter,
4874 .write_iter = f2fs_file_write_iter,
4875 .open = f2fs_file_open,
4876 .release = f2fs_release_file,
4877 .mmap = f2fs_file_mmap,
4878 .flush = f2fs_file_flush,
4879 .fsync = f2fs_sync_file,
4880 .fallocate = f2fs_fallocate,
4881 .unlocked_ioctl = f2fs_ioctl,
4882#ifdef CONFIG_COMPAT
4883 .compat_ioctl = f2fs_compat_ioctl,
4884#endif
4885 .splice_read = generic_file_splice_read,
4886 .splice_write = iter_file_splice_write,
4887 .fadvise = f2fs_file_fadvise,
4888};