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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/uio.h>
24#include <linux/uuid.h>
25#include <linux/file.h>
26
27#include "f2fs.h"
28#include "node.h"
29#include "segment.h"
30#include "xattr.h"
31#include "acl.h"
32#include "gc.h"
33#include "trace.h"
34#include <trace/events/f2fs.h>
35
36static int f2fs_filemap_fault(struct vm_fault *vmf)
37{
38 struct inode *inode = file_inode(vmf->vma->vm_file);
39 int err;
40
41 down_read(&F2FS_I(inode)->i_mmap_sem);
42 err = filemap_fault(vmf);
43 up_read(&F2FS_I(inode)->i_mmap_sem);
44
45 return err;
46}
47
48static int f2fs_vm_page_mkwrite(struct vm_fault *vmf)
49{
50 struct page *page = vmf->page;
51 struct inode *inode = file_inode(vmf->vma->vm_file);
52 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
53 struct dnode_of_data dn;
54 int err;
55
56 if (unlikely(f2fs_cp_error(sbi))) {
57 err = -EIO;
58 goto err;
59 }
60
61 sb_start_pagefault(inode->i_sb);
62
63 f2fs_bug_on(sbi, f2fs_has_inline_data(inode));
64
65 /* block allocation */
66 f2fs_lock_op(sbi);
67 set_new_dnode(&dn, inode, NULL, NULL, 0);
68 err = f2fs_reserve_block(&dn, page->index);
69 if (err) {
70 f2fs_unlock_op(sbi);
71 goto out;
72 }
73 f2fs_put_dnode(&dn);
74 f2fs_unlock_op(sbi);
75
76 f2fs_balance_fs(sbi, dn.node_changed);
77
78 file_update_time(vmf->vma->vm_file);
79 down_read(&F2FS_I(inode)->i_mmap_sem);
80 lock_page(page);
81 if (unlikely(page->mapping != inode->i_mapping ||
82 page_offset(page) > i_size_read(inode) ||
83 !PageUptodate(page))) {
84 unlock_page(page);
85 err = -EFAULT;
86 goto out_sem;
87 }
88
89 /*
90 * check to see if the page is mapped already (no holes)
91 */
92 if (PageMappedToDisk(page))
93 goto mapped;
94
95 /* page is wholly or partially inside EOF */
96 if (((loff_t)(page->index + 1) << PAGE_SHIFT) >
97 i_size_read(inode)) {
98 unsigned offset;
99 offset = i_size_read(inode) & ~PAGE_MASK;
100 zero_user_segment(page, offset, PAGE_SIZE);
101 }
102 set_page_dirty(page);
103 if (!PageUptodate(page))
104 SetPageUptodate(page);
105
106 f2fs_update_iostat(sbi, APP_MAPPED_IO, F2FS_BLKSIZE);
107
108 trace_f2fs_vm_page_mkwrite(page, DATA);
109mapped:
110 /* fill the page */
111 f2fs_wait_on_page_writeback(page, DATA, false);
112
113 /* wait for GCed encrypted page writeback */
114 if (f2fs_encrypted_file(inode))
115 f2fs_wait_on_block_writeback(sbi, dn.data_blkaddr);
116
117out_sem:
118 up_read(&F2FS_I(inode)->i_mmap_sem);
119out:
120 sb_end_pagefault(inode->i_sb);
121 f2fs_update_time(sbi, REQ_TIME);
122err:
123 return block_page_mkwrite_return(err);
124}
125
126static const struct vm_operations_struct f2fs_file_vm_ops = {
127 .fault = f2fs_filemap_fault,
128 .map_pages = filemap_map_pages,
129 .page_mkwrite = f2fs_vm_page_mkwrite,
130};
131
132static int get_parent_ino(struct inode *inode, nid_t *pino)
133{
134 struct dentry *dentry;
135
136 inode = igrab(inode);
137 dentry = d_find_any_alias(inode);
138 iput(inode);
139 if (!dentry)
140 return 0;
141
142 *pino = parent_ino(dentry);
143 dput(dentry);
144 return 1;
145}
146
147static inline enum cp_reason_type need_do_checkpoint(struct inode *inode)
148{
149 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
150 enum cp_reason_type cp_reason = CP_NO_NEEDED;
151
152 if (!S_ISREG(inode->i_mode))
153 cp_reason = CP_NON_REGULAR;
154 else if (inode->i_nlink != 1)
155 cp_reason = CP_HARDLINK;
156 else if (is_sbi_flag_set(sbi, SBI_NEED_CP))
157 cp_reason = CP_SB_NEED_CP;
158 else if (file_wrong_pino(inode))
159 cp_reason = CP_WRONG_PINO;
160 else if (!space_for_roll_forward(sbi))
161 cp_reason = CP_NO_SPC_ROLL;
162 else if (!is_checkpointed_node(sbi, F2FS_I(inode)->i_pino))
163 cp_reason = CP_NODE_NEED_CP;
164 else if (test_opt(sbi, FASTBOOT))
165 cp_reason = CP_FASTBOOT_MODE;
166 else if (F2FS_OPTION(sbi).active_logs == 2)
167 cp_reason = CP_SPEC_LOG_NUM;
168 else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT &&
169 need_dentry_mark(sbi, inode->i_ino) &&
170 exist_written_data(sbi, F2FS_I(inode)->i_pino, TRANS_DIR_INO))
171 cp_reason = CP_RECOVER_DIR;
172
173 return cp_reason;
174}
175
176static bool need_inode_page_update(struct f2fs_sb_info *sbi, nid_t ino)
177{
178 struct page *i = find_get_page(NODE_MAPPING(sbi), ino);
179 bool ret = false;
180 /* But we need to avoid that there are some inode updates */
181 if ((i && PageDirty(i)) || need_inode_block_update(sbi, ino))
182 ret = true;
183 f2fs_put_page(i, 0);
184 return ret;
185}
186
187static void try_to_fix_pino(struct inode *inode)
188{
189 struct f2fs_inode_info *fi = F2FS_I(inode);
190 nid_t pino;
191
192 down_write(&fi->i_sem);
193 if (file_wrong_pino(inode) && inode->i_nlink == 1 &&
194 get_parent_ino(inode, &pino)) {
195 f2fs_i_pino_write(inode, pino);
196 file_got_pino(inode);
197 }
198 up_write(&fi->i_sem);
199}
200
201static int f2fs_do_sync_file(struct file *file, loff_t start, loff_t end,
202 int datasync, bool atomic)
203{
204 struct inode *inode = file->f_mapping->host;
205 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
206 nid_t ino = inode->i_ino;
207 int ret = 0;
208 enum cp_reason_type cp_reason = 0;
209 struct writeback_control wbc = {
210 .sync_mode = WB_SYNC_ALL,
211 .nr_to_write = LONG_MAX,
212 .for_reclaim = 0,
213 };
214
215 if (unlikely(f2fs_readonly(inode->i_sb)))
216 return 0;
217
218 trace_f2fs_sync_file_enter(inode);
219
220 /* if fdatasync is triggered, let's do in-place-update */
221 if (datasync || get_dirty_pages(inode) <= SM_I(sbi)->min_fsync_blocks)
222 set_inode_flag(inode, FI_NEED_IPU);
223 ret = file_write_and_wait_range(file, start, end);
224 clear_inode_flag(inode, FI_NEED_IPU);
225
226 if (ret) {
227 trace_f2fs_sync_file_exit(inode, cp_reason, datasync, ret);
228 return ret;
229 }
230
231 /* if the inode is dirty, let's recover all the time */
232 if (!f2fs_skip_inode_update(inode, datasync)) {
233 f2fs_write_inode(inode, NULL);
234 goto go_write;
235 }
236
237 /*
238 * if there is no written data, don't waste time to write recovery info.
239 */
240 if (!is_inode_flag_set(inode, FI_APPEND_WRITE) &&
241 !exist_written_data(sbi, ino, APPEND_INO)) {
242
243 /* it may call write_inode just prior to fsync */
244 if (need_inode_page_update(sbi, ino))
245 goto go_write;
246
247 if (is_inode_flag_set(inode, FI_UPDATE_WRITE) ||
248 exist_written_data(sbi, ino, UPDATE_INO))
249 goto flush_out;
250 goto out;
251 }
252go_write:
253 /*
254 * Both of fdatasync() and fsync() are able to be recovered from
255 * sudden-power-off.
256 */
257 down_read(&F2FS_I(inode)->i_sem);
258 cp_reason = need_do_checkpoint(inode);
259 up_read(&F2FS_I(inode)->i_sem);
260
261 if (cp_reason) {
262 /* all the dirty node pages should be flushed for POR */
263 ret = f2fs_sync_fs(inode->i_sb, 1);
264
265 /*
266 * We've secured consistency through sync_fs. Following pino
267 * will be used only for fsynced inodes after checkpoint.
268 */
269 try_to_fix_pino(inode);
270 clear_inode_flag(inode, FI_APPEND_WRITE);
271 clear_inode_flag(inode, FI_UPDATE_WRITE);
272 goto out;
273 }
274sync_nodes:
275 ret = fsync_node_pages(sbi, inode, &wbc, atomic);
276 if (ret)
277 goto out;
278
279 /* if cp_error was enabled, we should avoid infinite loop */
280 if (unlikely(f2fs_cp_error(sbi))) {
281 ret = -EIO;
282 goto out;
283 }
284
285 if (need_inode_block_update(sbi, ino)) {
286 f2fs_mark_inode_dirty_sync(inode, true);
287 f2fs_write_inode(inode, NULL);
288 goto sync_nodes;
289 }
290
291 /*
292 * If it's atomic_write, it's just fine to keep write ordering. So
293 * here we don't need to wait for node write completion, since we use
294 * node chain which serializes node blocks. If one of node writes are
295 * reordered, we can see simply broken chain, resulting in stopping
296 * roll-forward recovery. It means we'll recover all or none node blocks
297 * given fsync mark.
298 */
299 if (!atomic) {
300 ret = wait_on_node_pages_writeback(sbi, ino);
301 if (ret)
302 goto out;
303 }
304
305 /* once recovery info is written, don't need to tack this */
306 remove_ino_entry(sbi, ino, APPEND_INO);
307 clear_inode_flag(inode, FI_APPEND_WRITE);
308flush_out:
309 if (!atomic)
310 ret = f2fs_issue_flush(sbi, inode->i_ino);
311 if (!ret) {
312 remove_ino_entry(sbi, ino, UPDATE_INO);
313 clear_inode_flag(inode, FI_UPDATE_WRITE);
314 remove_ino_entry(sbi, ino, FLUSH_INO);
315 }
316 f2fs_update_time(sbi, REQ_TIME);
317out:
318 trace_f2fs_sync_file_exit(inode, cp_reason, datasync, ret);
319 f2fs_trace_ios(NULL, 1);
320 return ret;
321}
322
323int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
324{
325 if (unlikely(f2fs_cp_error(F2FS_I_SB(file_inode(file)))))
326 return -EIO;
327 return f2fs_do_sync_file(file, start, end, datasync, false);
328}
329
330static pgoff_t __get_first_dirty_index(struct address_space *mapping,
331 pgoff_t pgofs, int whence)
332{
333 struct page *page;
334 int nr_pages;
335
336 if (whence != SEEK_DATA)
337 return 0;
338
339 /* find first dirty page index */
340 nr_pages = find_get_pages_tag(mapping, &pgofs, PAGECACHE_TAG_DIRTY,
341 1, &page);
342 if (!nr_pages)
343 return ULONG_MAX;
344 pgofs = page->index;
345 put_page(page);
346 return pgofs;
347}
348
349static bool __found_offset(block_t blkaddr, pgoff_t dirty, pgoff_t pgofs,
350 int whence)
351{
352 switch (whence) {
353 case SEEK_DATA:
354 if ((blkaddr == NEW_ADDR && dirty == pgofs) ||
355 (blkaddr != NEW_ADDR && blkaddr != NULL_ADDR))
356 return true;
357 break;
358 case SEEK_HOLE:
359 if (blkaddr == NULL_ADDR)
360 return true;
361 break;
362 }
363 return false;
364}
365
366static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence)
367{
368 struct inode *inode = file->f_mapping->host;
369 loff_t maxbytes = inode->i_sb->s_maxbytes;
370 struct dnode_of_data dn;
371 pgoff_t pgofs, end_offset, dirty;
372 loff_t data_ofs = offset;
373 loff_t isize;
374 int err = 0;
375
376 inode_lock(inode);
377
378 isize = i_size_read(inode);
379 if (offset >= isize)
380 goto fail;
381
382 /* handle inline data case */
383 if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode)) {
384 if (whence == SEEK_HOLE)
385 data_ofs = isize;
386 goto found;
387 }
388
389 pgofs = (pgoff_t)(offset >> PAGE_SHIFT);
390
391 dirty = __get_first_dirty_index(inode->i_mapping, pgofs, whence);
392
393 for (; data_ofs < isize; data_ofs = (loff_t)pgofs << PAGE_SHIFT) {
394 set_new_dnode(&dn, inode, NULL, NULL, 0);
395 err = get_dnode_of_data(&dn, pgofs, LOOKUP_NODE);
396 if (err && err != -ENOENT) {
397 goto fail;
398 } else if (err == -ENOENT) {
399 /* direct node does not exists */
400 if (whence == SEEK_DATA) {
401 pgofs = get_next_page_offset(&dn, pgofs);
402 continue;
403 } else {
404 goto found;
405 }
406 }
407
408 end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
409
410 /* find data/hole in dnode block */
411 for (; dn.ofs_in_node < end_offset;
412 dn.ofs_in_node++, pgofs++,
413 data_ofs = (loff_t)pgofs << PAGE_SHIFT) {
414 block_t blkaddr;
415 blkaddr = datablock_addr(dn.inode,
416 dn.node_page, dn.ofs_in_node);
417
418 if (__found_offset(blkaddr, dirty, pgofs, whence)) {
419 f2fs_put_dnode(&dn);
420 goto found;
421 }
422 }
423 f2fs_put_dnode(&dn);
424 }
425
426 if (whence == SEEK_DATA)
427 goto fail;
428found:
429 if (whence == SEEK_HOLE && data_ofs > isize)
430 data_ofs = isize;
431 inode_unlock(inode);
432 return vfs_setpos(file, data_ofs, maxbytes);
433fail:
434 inode_unlock(inode);
435 return -ENXIO;
436}
437
438static loff_t f2fs_llseek(struct file *file, loff_t offset, int whence)
439{
440 struct inode *inode = file->f_mapping->host;
441 loff_t maxbytes = inode->i_sb->s_maxbytes;
442
443 switch (whence) {
444 case SEEK_SET:
445 case SEEK_CUR:
446 case SEEK_END:
447 return generic_file_llseek_size(file, offset, whence,
448 maxbytes, i_size_read(inode));
449 case SEEK_DATA:
450 case SEEK_HOLE:
451 if (offset < 0)
452 return -ENXIO;
453 return f2fs_seek_block(file, offset, whence);
454 }
455
456 return -EINVAL;
457}
458
459static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma)
460{
461 struct inode *inode = file_inode(file);
462 int err;
463
464 if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
465 return -EIO;
466
467 /* we don't need to use inline_data strictly */
468 err = f2fs_convert_inline_inode(inode);
469 if (err)
470 return err;
471
472 file_accessed(file);
473 vma->vm_ops = &f2fs_file_vm_ops;
474 return 0;
475}
476
477static int f2fs_file_open(struct inode *inode, struct file *filp)
478{
479 int err = fscrypt_file_open(inode, filp);
480
481 if (err)
482 return err;
483
484 filp->f_mode |= FMODE_NOWAIT;
485
486 return dquot_file_open(inode, filp);
487}
488
489void truncate_data_blocks_range(struct dnode_of_data *dn, int count)
490{
491 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
492 struct f2fs_node *raw_node;
493 int nr_free = 0, ofs = dn->ofs_in_node, len = count;
494 __le32 *addr;
495 int base = 0;
496
497 if (IS_INODE(dn->node_page) && f2fs_has_extra_attr(dn->inode))
498 base = get_extra_isize(dn->inode);
499
500 raw_node = F2FS_NODE(dn->node_page);
501 addr = blkaddr_in_node(raw_node) + base + ofs;
502
503 for (; count > 0; count--, addr++, dn->ofs_in_node++) {
504 block_t blkaddr = le32_to_cpu(*addr);
505 if (blkaddr == NULL_ADDR)
506 continue;
507
508 dn->data_blkaddr = NULL_ADDR;
509 set_data_blkaddr(dn);
510 invalidate_blocks(sbi, blkaddr);
511 if (dn->ofs_in_node == 0 && IS_INODE(dn->node_page))
512 clear_inode_flag(dn->inode, FI_FIRST_BLOCK_WRITTEN);
513 nr_free++;
514 }
515
516 if (nr_free) {
517 pgoff_t fofs;
518 /*
519 * once we invalidate valid blkaddr in range [ofs, ofs + count],
520 * we will invalidate all blkaddr in the whole range.
521 */
522 fofs = start_bidx_of_node(ofs_of_node(dn->node_page),
523 dn->inode) + ofs;
524 f2fs_update_extent_cache_range(dn, fofs, 0, len);
525 dec_valid_block_count(sbi, dn->inode, nr_free);
526 }
527 dn->ofs_in_node = ofs;
528
529 f2fs_update_time(sbi, REQ_TIME);
530 trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid,
531 dn->ofs_in_node, nr_free);
532}
533
534void truncate_data_blocks(struct dnode_of_data *dn)
535{
536 truncate_data_blocks_range(dn, ADDRS_PER_BLOCK);
537}
538
539static int truncate_partial_data_page(struct inode *inode, u64 from,
540 bool cache_only)
541{
542 unsigned offset = from & (PAGE_SIZE - 1);
543 pgoff_t index = from >> PAGE_SHIFT;
544 struct address_space *mapping = inode->i_mapping;
545 struct page *page;
546
547 if (!offset && !cache_only)
548 return 0;
549
550 if (cache_only) {
551 page = find_lock_page(mapping, index);
552 if (page && PageUptodate(page))
553 goto truncate_out;
554 f2fs_put_page(page, 1);
555 return 0;
556 }
557
558 page = get_lock_data_page(inode, index, true);
559 if (IS_ERR(page))
560 return PTR_ERR(page) == -ENOENT ? 0 : PTR_ERR(page);
561truncate_out:
562 f2fs_wait_on_page_writeback(page, DATA, true);
563 zero_user(page, offset, PAGE_SIZE - offset);
564
565 /* An encrypted inode should have a key and truncate the last page. */
566 f2fs_bug_on(F2FS_I_SB(inode), cache_only && f2fs_encrypted_inode(inode));
567 if (!cache_only)
568 set_page_dirty(page);
569 f2fs_put_page(page, 1);
570 return 0;
571}
572
573int truncate_blocks(struct inode *inode, u64 from, bool lock)
574{
575 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
576 struct dnode_of_data dn;
577 pgoff_t free_from;
578 int count = 0, err = 0;
579 struct page *ipage;
580 bool truncate_page = false;
581
582 trace_f2fs_truncate_blocks_enter(inode, from);
583
584 free_from = (pgoff_t)F2FS_BLK_ALIGN(from);
585
586 if (free_from >= sbi->max_file_blocks)
587 goto free_partial;
588
589 if (lock)
590 f2fs_lock_op(sbi);
591
592 ipage = get_node_page(sbi, inode->i_ino);
593 if (IS_ERR(ipage)) {
594 err = PTR_ERR(ipage);
595 goto out;
596 }
597
598 if (f2fs_has_inline_data(inode)) {
599 truncate_inline_inode(inode, ipage, from);
600 f2fs_put_page(ipage, 1);
601 truncate_page = true;
602 goto out;
603 }
604
605 set_new_dnode(&dn, inode, ipage, NULL, 0);
606 err = get_dnode_of_data(&dn, free_from, LOOKUP_NODE_RA);
607 if (err) {
608 if (err == -ENOENT)
609 goto free_next;
610 goto out;
611 }
612
613 count = ADDRS_PER_PAGE(dn.node_page, inode);
614
615 count -= dn.ofs_in_node;
616 f2fs_bug_on(sbi, count < 0);
617
618 if (dn.ofs_in_node || IS_INODE(dn.node_page)) {
619 truncate_data_blocks_range(&dn, count);
620 free_from += count;
621 }
622
623 f2fs_put_dnode(&dn);
624free_next:
625 err = truncate_inode_blocks(inode, free_from);
626out:
627 if (lock)
628 f2fs_unlock_op(sbi);
629free_partial:
630 /* lastly zero out the first data page */
631 if (!err)
632 err = truncate_partial_data_page(inode, from, truncate_page);
633
634 trace_f2fs_truncate_blocks_exit(inode, err);
635 return err;
636}
637
638int f2fs_truncate(struct inode *inode)
639{
640 int err;
641
642 if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
643 return -EIO;
644
645 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
646 S_ISLNK(inode->i_mode)))
647 return 0;
648
649 trace_f2fs_truncate(inode);
650
651#ifdef CONFIG_F2FS_FAULT_INJECTION
652 if (time_to_inject(F2FS_I_SB(inode), FAULT_TRUNCATE)) {
653 f2fs_show_injection_info(FAULT_TRUNCATE);
654 return -EIO;
655 }
656#endif
657 /* we should check inline_data size */
658 if (!f2fs_may_inline_data(inode)) {
659 err = f2fs_convert_inline_inode(inode);
660 if (err)
661 return err;
662 }
663
664 err = truncate_blocks(inode, i_size_read(inode), true);
665 if (err)
666 return err;
667
668 inode->i_mtime = inode->i_ctime = current_time(inode);
669 f2fs_mark_inode_dirty_sync(inode, false);
670 return 0;
671}
672
673int f2fs_getattr(const struct path *path, struct kstat *stat,
674 u32 request_mask, unsigned int query_flags)
675{
676 struct inode *inode = d_inode(path->dentry);
677 struct f2fs_inode_info *fi = F2FS_I(inode);
678 struct f2fs_inode *ri;
679 unsigned int flags;
680
681 if (f2fs_has_extra_attr(inode) &&
682 f2fs_sb_has_inode_crtime(inode->i_sb) &&
683 F2FS_FITS_IN_INODE(ri, fi->i_extra_isize, i_crtime)) {
684 stat->result_mask |= STATX_BTIME;
685 stat->btime.tv_sec = fi->i_crtime.tv_sec;
686 stat->btime.tv_nsec = fi->i_crtime.tv_nsec;
687 }
688
689 flags = fi->i_flags & (FS_FL_USER_VISIBLE | FS_PROJINHERIT_FL);
690 if (flags & FS_APPEND_FL)
691 stat->attributes |= STATX_ATTR_APPEND;
692 if (flags & FS_COMPR_FL)
693 stat->attributes |= STATX_ATTR_COMPRESSED;
694 if (f2fs_encrypted_inode(inode))
695 stat->attributes |= STATX_ATTR_ENCRYPTED;
696 if (flags & FS_IMMUTABLE_FL)
697 stat->attributes |= STATX_ATTR_IMMUTABLE;
698 if (flags & FS_NODUMP_FL)
699 stat->attributes |= STATX_ATTR_NODUMP;
700
701 stat->attributes_mask |= (STATX_ATTR_APPEND |
702 STATX_ATTR_COMPRESSED |
703 STATX_ATTR_ENCRYPTED |
704 STATX_ATTR_IMMUTABLE |
705 STATX_ATTR_NODUMP);
706
707 generic_fillattr(inode, stat);
708
709 /* we need to show initial sectors used for inline_data/dentries */
710 if ((S_ISREG(inode->i_mode) && f2fs_has_inline_data(inode)) ||
711 f2fs_has_inline_dentry(inode))
712 stat->blocks += (stat->size + 511) >> 9;
713
714 return 0;
715}
716
717#ifdef CONFIG_F2FS_FS_POSIX_ACL
718static void __setattr_copy(struct inode *inode, const struct iattr *attr)
719{
720 unsigned int ia_valid = attr->ia_valid;
721
722 if (ia_valid & ATTR_UID)
723 inode->i_uid = attr->ia_uid;
724 if (ia_valid & ATTR_GID)
725 inode->i_gid = attr->ia_gid;
726 if (ia_valid & ATTR_ATIME)
727 inode->i_atime = timespec_trunc(attr->ia_atime,
728 inode->i_sb->s_time_gran);
729 if (ia_valid & ATTR_MTIME)
730 inode->i_mtime = timespec_trunc(attr->ia_mtime,
731 inode->i_sb->s_time_gran);
732 if (ia_valid & ATTR_CTIME)
733 inode->i_ctime = timespec_trunc(attr->ia_ctime,
734 inode->i_sb->s_time_gran);
735 if (ia_valid & ATTR_MODE) {
736 umode_t mode = attr->ia_mode;
737
738 if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
739 mode &= ~S_ISGID;
740 set_acl_inode(inode, mode);
741 }
742}
743#else
744#define __setattr_copy setattr_copy
745#endif
746
747int f2fs_setattr(struct dentry *dentry, struct iattr *attr)
748{
749 struct inode *inode = d_inode(dentry);
750 int err;
751 bool size_changed = false;
752
753 if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
754 return -EIO;
755
756 err = setattr_prepare(dentry, attr);
757 if (err)
758 return err;
759
760 err = fscrypt_prepare_setattr(dentry, attr);
761 if (err)
762 return err;
763
764 if (is_quota_modification(inode, attr)) {
765 err = dquot_initialize(inode);
766 if (err)
767 return err;
768 }
769 if ((attr->ia_valid & ATTR_UID &&
770 !uid_eq(attr->ia_uid, inode->i_uid)) ||
771 (attr->ia_valid & ATTR_GID &&
772 !gid_eq(attr->ia_gid, inode->i_gid))) {
773 err = dquot_transfer(inode, attr);
774 if (err)
775 return err;
776 }
777
778 if (attr->ia_valid & ATTR_SIZE) {
779 if (attr->ia_size <= i_size_read(inode)) {
780 down_write(&F2FS_I(inode)->i_mmap_sem);
781 truncate_setsize(inode, attr->ia_size);
782 err = f2fs_truncate(inode);
783 up_write(&F2FS_I(inode)->i_mmap_sem);
784 if (err)
785 return err;
786 } else {
787 /*
788 * do not trim all blocks after i_size if target size is
789 * larger than i_size.
790 */
791 down_write(&F2FS_I(inode)->i_mmap_sem);
792 truncate_setsize(inode, attr->ia_size);
793 up_write(&F2FS_I(inode)->i_mmap_sem);
794
795 /* should convert inline inode here */
796 if (!f2fs_may_inline_data(inode)) {
797 err = f2fs_convert_inline_inode(inode);
798 if (err)
799 return err;
800 }
801 inode->i_mtime = inode->i_ctime = current_time(inode);
802 }
803
804 down_write(&F2FS_I(inode)->i_sem);
805 F2FS_I(inode)->last_disk_size = i_size_read(inode);
806 up_write(&F2FS_I(inode)->i_sem);
807
808 size_changed = true;
809 }
810
811 __setattr_copy(inode, attr);
812
813 if (attr->ia_valid & ATTR_MODE) {
814 err = posix_acl_chmod(inode, get_inode_mode(inode));
815 if (err || is_inode_flag_set(inode, FI_ACL_MODE)) {
816 inode->i_mode = F2FS_I(inode)->i_acl_mode;
817 clear_inode_flag(inode, FI_ACL_MODE);
818 }
819 }
820
821 /* file size may changed here */
822 f2fs_mark_inode_dirty_sync(inode, size_changed);
823
824 /* inode change will produce dirty node pages flushed by checkpoint */
825 f2fs_balance_fs(F2FS_I_SB(inode), true);
826
827 return err;
828}
829
830const struct inode_operations f2fs_file_inode_operations = {
831 .getattr = f2fs_getattr,
832 .setattr = f2fs_setattr,
833 .get_acl = f2fs_get_acl,
834 .set_acl = f2fs_set_acl,
835#ifdef CONFIG_F2FS_FS_XATTR
836 .listxattr = f2fs_listxattr,
837#endif
838 .fiemap = f2fs_fiemap,
839};
840
841static int fill_zero(struct inode *inode, pgoff_t index,
842 loff_t start, loff_t len)
843{
844 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
845 struct page *page;
846
847 if (!len)
848 return 0;
849
850 f2fs_balance_fs(sbi, true);
851
852 f2fs_lock_op(sbi);
853 page = get_new_data_page(inode, NULL, index, false);
854 f2fs_unlock_op(sbi);
855
856 if (IS_ERR(page))
857 return PTR_ERR(page);
858
859 f2fs_wait_on_page_writeback(page, DATA, true);
860 zero_user(page, start, len);
861 set_page_dirty(page);
862 f2fs_put_page(page, 1);
863 return 0;
864}
865
866int truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end)
867{
868 int err;
869
870 while (pg_start < pg_end) {
871 struct dnode_of_data dn;
872 pgoff_t end_offset, count;
873
874 set_new_dnode(&dn, inode, NULL, NULL, 0);
875 err = get_dnode_of_data(&dn, pg_start, LOOKUP_NODE);
876 if (err) {
877 if (err == -ENOENT) {
878 pg_start = get_next_page_offset(&dn, pg_start);
879 continue;
880 }
881 return err;
882 }
883
884 end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
885 count = min(end_offset - dn.ofs_in_node, pg_end - pg_start);
886
887 f2fs_bug_on(F2FS_I_SB(inode), count == 0 || count > end_offset);
888
889 truncate_data_blocks_range(&dn, count);
890 f2fs_put_dnode(&dn);
891
892 pg_start += count;
893 }
894 return 0;
895}
896
897static int punch_hole(struct inode *inode, loff_t offset, loff_t len)
898{
899 pgoff_t pg_start, pg_end;
900 loff_t off_start, off_end;
901 int ret;
902
903 ret = f2fs_convert_inline_inode(inode);
904 if (ret)
905 return ret;
906
907 pg_start = ((unsigned long long) offset) >> PAGE_SHIFT;
908 pg_end = ((unsigned long long) offset + len) >> PAGE_SHIFT;
909
910 off_start = offset & (PAGE_SIZE - 1);
911 off_end = (offset + len) & (PAGE_SIZE - 1);
912
913 if (pg_start == pg_end) {
914 ret = fill_zero(inode, pg_start, off_start,
915 off_end - off_start);
916 if (ret)
917 return ret;
918 } else {
919 if (off_start) {
920 ret = fill_zero(inode, pg_start++, off_start,
921 PAGE_SIZE - off_start);
922 if (ret)
923 return ret;
924 }
925 if (off_end) {
926 ret = fill_zero(inode, pg_end, 0, off_end);
927 if (ret)
928 return ret;
929 }
930
931 if (pg_start < pg_end) {
932 struct address_space *mapping = inode->i_mapping;
933 loff_t blk_start, blk_end;
934 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
935
936 f2fs_balance_fs(sbi, true);
937
938 blk_start = (loff_t)pg_start << PAGE_SHIFT;
939 blk_end = (loff_t)pg_end << PAGE_SHIFT;
940 down_write(&F2FS_I(inode)->i_mmap_sem);
941 truncate_inode_pages_range(mapping, blk_start,
942 blk_end - 1);
943
944 f2fs_lock_op(sbi);
945 ret = truncate_hole(inode, pg_start, pg_end);
946 f2fs_unlock_op(sbi);
947 up_write(&F2FS_I(inode)->i_mmap_sem);
948 }
949 }
950
951 return ret;
952}
953
954static int __read_out_blkaddrs(struct inode *inode, block_t *blkaddr,
955 int *do_replace, pgoff_t off, pgoff_t len)
956{
957 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
958 struct dnode_of_data dn;
959 int ret, done, i;
960
961next_dnode:
962 set_new_dnode(&dn, inode, NULL, NULL, 0);
963 ret = get_dnode_of_data(&dn, off, LOOKUP_NODE_RA);
964 if (ret && ret != -ENOENT) {
965 return ret;
966 } else if (ret == -ENOENT) {
967 if (dn.max_level == 0)
968 return -ENOENT;
969 done = min((pgoff_t)ADDRS_PER_BLOCK - dn.ofs_in_node, len);
970 blkaddr += done;
971 do_replace += done;
972 goto next;
973 }
974
975 done = min((pgoff_t)ADDRS_PER_PAGE(dn.node_page, inode) -
976 dn.ofs_in_node, len);
977 for (i = 0; i < done; i++, blkaddr++, do_replace++, dn.ofs_in_node++) {
978 *blkaddr = datablock_addr(dn.inode,
979 dn.node_page, dn.ofs_in_node);
980 if (!is_checkpointed_data(sbi, *blkaddr)) {
981
982 if (test_opt(sbi, LFS)) {
983 f2fs_put_dnode(&dn);
984 return -ENOTSUPP;
985 }
986
987 /* do not invalidate this block address */
988 f2fs_update_data_blkaddr(&dn, NULL_ADDR);
989 *do_replace = 1;
990 }
991 }
992 f2fs_put_dnode(&dn);
993next:
994 len -= done;
995 off += done;
996 if (len)
997 goto next_dnode;
998 return 0;
999}
1000
1001static int __roll_back_blkaddrs(struct inode *inode, block_t *blkaddr,
1002 int *do_replace, pgoff_t off, int len)
1003{
1004 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1005 struct dnode_of_data dn;
1006 int ret, i;
1007
1008 for (i = 0; i < len; i++, do_replace++, blkaddr++) {
1009 if (*do_replace == 0)
1010 continue;
1011
1012 set_new_dnode(&dn, inode, NULL, NULL, 0);
1013 ret = get_dnode_of_data(&dn, off + i, LOOKUP_NODE_RA);
1014 if (ret) {
1015 dec_valid_block_count(sbi, inode, 1);
1016 invalidate_blocks(sbi, *blkaddr);
1017 } else {
1018 f2fs_update_data_blkaddr(&dn, *blkaddr);
1019 }
1020 f2fs_put_dnode(&dn);
1021 }
1022 return 0;
1023}
1024
1025static int __clone_blkaddrs(struct inode *src_inode, struct inode *dst_inode,
1026 block_t *blkaddr, int *do_replace,
1027 pgoff_t src, pgoff_t dst, pgoff_t len, bool full)
1028{
1029 struct f2fs_sb_info *sbi = F2FS_I_SB(src_inode);
1030 pgoff_t i = 0;
1031 int ret;
1032
1033 while (i < len) {
1034 if (blkaddr[i] == NULL_ADDR && !full) {
1035 i++;
1036 continue;
1037 }
1038
1039 if (do_replace[i] || blkaddr[i] == NULL_ADDR) {
1040 struct dnode_of_data dn;
1041 struct node_info ni;
1042 size_t new_size;
1043 pgoff_t ilen;
1044
1045 set_new_dnode(&dn, dst_inode, NULL, NULL, 0);
1046 ret = get_dnode_of_data(&dn, dst + i, ALLOC_NODE);
1047 if (ret)
1048 return ret;
1049
1050 get_node_info(sbi, dn.nid, &ni);
1051 ilen = min((pgoff_t)
1052 ADDRS_PER_PAGE(dn.node_page, dst_inode) -
1053 dn.ofs_in_node, len - i);
1054 do {
1055 dn.data_blkaddr = datablock_addr(dn.inode,
1056 dn.node_page, dn.ofs_in_node);
1057 truncate_data_blocks_range(&dn, 1);
1058
1059 if (do_replace[i]) {
1060 f2fs_i_blocks_write(src_inode,
1061 1, false, false);
1062 f2fs_i_blocks_write(dst_inode,
1063 1, true, false);
1064 f2fs_replace_block(sbi, &dn, dn.data_blkaddr,
1065 blkaddr[i], ni.version, true, false);
1066
1067 do_replace[i] = 0;
1068 }
1069 dn.ofs_in_node++;
1070 i++;
1071 new_size = (dst + i) << PAGE_SHIFT;
1072 if (dst_inode->i_size < new_size)
1073 f2fs_i_size_write(dst_inode, new_size);
1074 } while (--ilen && (do_replace[i] || blkaddr[i] == NULL_ADDR));
1075
1076 f2fs_put_dnode(&dn);
1077 } else {
1078 struct page *psrc, *pdst;
1079
1080 psrc = get_lock_data_page(src_inode, src + i, true);
1081 if (IS_ERR(psrc))
1082 return PTR_ERR(psrc);
1083 pdst = get_new_data_page(dst_inode, NULL, dst + i,
1084 true);
1085 if (IS_ERR(pdst)) {
1086 f2fs_put_page(psrc, 1);
1087 return PTR_ERR(pdst);
1088 }
1089 f2fs_copy_page(psrc, pdst);
1090 set_page_dirty(pdst);
1091 f2fs_put_page(pdst, 1);
1092 f2fs_put_page(psrc, 1);
1093
1094 ret = truncate_hole(src_inode, src + i, src + i + 1);
1095 if (ret)
1096 return ret;
1097 i++;
1098 }
1099 }
1100 return 0;
1101}
1102
1103static int __exchange_data_block(struct inode *src_inode,
1104 struct inode *dst_inode, pgoff_t src, pgoff_t dst,
1105 pgoff_t len, bool full)
1106{
1107 block_t *src_blkaddr;
1108 int *do_replace;
1109 pgoff_t olen;
1110 int ret;
1111
1112 while (len) {
1113 olen = min((pgoff_t)4 * ADDRS_PER_BLOCK, len);
1114
1115 src_blkaddr = f2fs_kvzalloc(F2FS_I_SB(src_inode),
1116 sizeof(block_t) * olen, GFP_KERNEL);
1117 if (!src_blkaddr)
1118 return -ENOMEM;
1119
1120 do_replace = f2fs_kvzalloc(F2FS_I_SB(src_inode),
1121 sizeof(int) * olen, GFP_KERNEL);
1122 if (!do_replace) {
1123 kvfree(src_blkaddr);
1124 return -ENOMEM;
1125 }
1126
1127 ret = __read_out_blkaddrs(src_inode, src_blkaddr,
1128 do_replace, src, olen);
1129 if (ret)
1130 goto roll_back;
1131
1132 ret = __clone_blkaddrs(src_inode, dst_inode, src_blkaddr,
1133 do_replace, src, dst, olen, full);
1134 if (ret)
1135 goto roll_back;
1136
1137 src += olen;
1138 dst += olen;
1139 len -= olen;
1140
1141 kvfree(src_blkaddr);
1142 kvfree(do_replace);
1143 }
1144 return 0;
1145
1146roll_back:
1147 __roll_back_blkaddrs(src_inode, src_blkaddr, do_replace, src, len);
1148 kvfree(src_blkaddr);
1149 kvfree(do_replace);
1150 return ret;
1151}
1152
1153static int f2fs_do_collapse(struct inode *inode, pgoff_t start, pgoff_t end)
1154{
1155 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1156 pgoff_t nrpages = (i_size_read(inode) + PAGE_SIZE - 1) / PAGE_SIZE;
1157 int ret;
1158
1159 f2fs_balance_fs(sbi, true);
1160 f2fs_lock_op(sbi);
1161
1162 f2fs_drop_extent_tree(inode);
1163
1164 ret = __exchange_data_block(inode, inode, end, start, nrpages - end, true);
1165 f2fs_unlock_op(sbi);
1166 return ret;
1167}
1168
1169static int f2fs_collapse_range(struct inode *inode, loff_t offset, loff_t len)
1170{
1171 pgoff_t pg_start, pg_end;
1172 loff_t new_size;
1173 int ret;
1174
1175 if (offset + len >= i_size_read(inode))
1176 return -EINVAL;
1177
1178 /* collapse range should be aligned to block size of f2fs. */
1179 if (offset & (F2FS_BLKSIZE - 1) || len & (F2FS_BLKSIZE - 1))
1180 return -EINVAL;
1181
1182 ret = f2fs_convert_inline_inode(inode);
1183 if (ret)
1184 return ret;
1185
1186 pg_start = offset >> PAGE_SHIFT;
1187 pg_end = (offset + len) >> PAGE_SHIFT;
1188
1189 /* avoid gc operation during block exchange */
1190 down_write(&F2FS_I(inode)->dio_rwsem[WRITE]);
1191
1192 down_write(&F2FS_I(inode)->i_mmap_sem);
1193 /* write out all dirty pages from offset */
1194 ret = filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX);
1195 if (ret)
1196 goto out_unlock;
1197
1198 truncate_pagecache(inode, offset);
1199
1200 ret = f2fs_do_collapse(inode, pg_start, pg_end);
1201 if (ret)
1202 goto out_unlock;
1203
1204 /* write out all moved pages, if possible */
1205 filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX);
1206 truncate_pagecache(inode, offset);
1207
1208 new_size = i_size_read(inode) - len;
1209 truncate_pagecache(inode, new_size);
1210
1211 ret = truncate_blocks(inode, new_size, true);
1212 if (!ret)
1213 f2fs_i_size_write(inode, new_size);
1214out_unlock:
1215 up_write(&F2FS_I(inode)->i_mmap_sem);
1216 up_write(&F2FS_I(inode)->dio_rwsem[WRITE]);
1217 return ret;
1218}
1219
1220static int f2fs_do_zero_range(struct dnode_of_data *dn, pgoff_t start,
1221 pgoff_t end)
1222{
1223 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
1224 pgoff_t index = start;
1225 unsigned int ofs_in_node = dn->ofs_in_node;
1226 blkcnt_t count = 0;
1227 int ret;
1228
1229 for (; index < end; index++, dn->ofs_in_node++) {
1230 if (datablock_addr(dn->inode, dn->node_page,
1231 dn->ofs_in_node) == NULL_ADDR)
1232 count++;
1233 }
1234
1235 dn->ofs_in_node = ofs_in_node;
1236 ret = reserve_new_blocks(dn, count);
1237 if (ret)
1238 return ret;
1239
1240 dn->ofs_in_node = ofs_in_node;
1241 for (index = start; index < end; index++, dn->ofs_in_node++) {
1242 dn->data_blkaddr = datablock_addr(dn->inode,
1243 dn->node_page, dn->ofs_in_node);
1244 /*
1245 * reserve_new_blocks will not guarantee entire block
1246 * allocation.
1247 */
1248 if (dn->data_blkaddr == NULL_ADDR) {
1249 ret = -ENOSPC;
1250 break;
1251 }
1252 if (dn->data_blkaddr != NEW_ADDR) {
1253 invalidate_blocks(sbi, dn->data_blkaddr);
1254 dn->data_blkaddr = NEW_ADDR;
1255 set_data_blkaddr(dn);
1256 }
1257 }
1258
1259 f2fs_update_extent_cache_range(dn, start, 0, index - start);
1260
1261 return ret;
1262}
1263
1264static int f2fs_zero_range(struct inode *inode, loff_t offset, loff_t len,
1265 int mode)
1266{
1267 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1268 struct address_space *mapping = inode->i_mapping;
1269 pgoff_t index, pg_start, pg_end;
1270 loff_t new_size = i_size_read(inode);
1271 loff_t off_start, off_end;
1272 int ret = 0;
1273
1274 ret = inode_newsize_ok(inode, (len + offset));
1275 if (ret)
1276 return ret;
1277
1278 ret = f2fs_convert_inline_inode(inode);
1279 if (ret)
1280 return ret;
1281
1282 down_write(&F2FS_I(inode)->i_mmap_sem);
1283 ret = filemap_write_and_wait_range(mapping, offset, offset + len - 1);
1284 if (ret)
1285 goto out_sem;
1286
1287 truncate_pagecache_range(inode, offset, offset + len - 1);
1288
1289 pg_start = ((unsigned long long) offset) >> PAGE_SHIFT;
1290 pg_end = ((unsigned long long) offset + len) >> PAGE_SHIFT;
1291
1292 off_start = offset & (PAGE_SIZE - 1);
1293 off_end = (offset + len) & (PAGE_SIZE - 1);
1294
1295 if (pg_start == pg_end) {
1296 ret = fill_zero(inode, pg_start, off_start,
1297 off_end - off_start);
1298 if (ret)
1299 goto out_sem;
1300
1301 new_size = max_t(loff_t, new_size, offset + len);
1302 } else {
1303 if (off_start) {
1304 ret = fill_zero(inode, pg_start++, off_start,
1305 PAGE_SIZE - off_start);
1306 if (ret)
1307 goto out_sem;
1308
1309 new_size = max_t(loff_t, new_size,
1310 (loff_t)pg_start << PAGE_SHIFT);
1311 }
1312
1313 for (index = pg_start; index < pg_end;) {
1314 struct dnode_of_data dn;
1315 unsigned int end_offset;
1316 pgoff_t end;
1317
1318 f2fs_lock_op(sbi);
1319
1320 set_new_dnode(&dn, inode, NULL, NULL, 0);
1321 ret = get_dnode_of_data(&dn, index, ALLOC_NODE);
1322 if (ret) {
1323 f2fs_unlock_op(sbi);
1324 goto out;
1325 }
1326
1327 end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
1328 end = min(pg_end, end_offset - dn.ofs_in_node + index);
1329
1330 ret = f2fs_do_zero_range(&dn, index, end);
1331 f2fs_put_dnode(&dn);
1332 f2fs_unlock_op(sbi);
1333
1334 f2fs_balance_fs(sbi, dn.node_changed);
1335
1336 if (ret)
1337 goto out;
1338
1339 index = end;
1340 new_size = max_t(loff_t, new_size,
1341 (loff_t)index << PAGE_SHIFT);
1342 }
1343
1344 if (off_end) {
1345 ret = fill_zero(inode, pg_end, 0, off_end);
1346 if (ret)
1347 goto out;
1348
1349 new_size = max_t(loff_t, new_size, offset + len);
1350 }
1351 }
1352
1353out:
1354 if (new_size > i_size_read(inode)) {
1355 if (mode & FALLOC_FL_KEEP_SIZE)
1356 file_set_keep_isize(inode);
1357 else
1358 f2fs_i_size_write(inode, new_size);
1359 }
1360out_sem:
1361 up_write(&F2FS_I(inode)->i_mmap_sem);
1362
1363 return ret;
1364}
1365
1366static int f2fs_insert_range(struct inode *inode, loff_t offset, loff_t len)
1367{
1368 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1369 pgoff_t nr, pg_start, pg_end, delta, idx;
1370 loff_t new_size;
1371 int ret = 0;
1372
1373 new_size = i_size_read(inode) + len;
1374 ret = inode_newsize_ok(inode, new_size);
1375 if (ret)
1376 return ret;
1377
1378 if (offset >= i_size_read(inode))
1379 return -EINVAL;
1380
1381 /* insert range should be aligned to block size of f2fs. */
1382 if (offset & (F2FS_BLKSIZE - 1) || len & (F2FS_BLKSIZE - 1))
1383 return -EINVAL;
1384
1385 ret = f2fs_convert_inline_inode(inode);
1386 if (ret)
1387 return ret;
1388
1389 f2fs_balance_fs(sbi, true);
1390
1391 /* avoid gc operation during block exchange */
1392 down_write(&F2FS_I(inode)->dio_rwsem[WRITE]);
1393
1394 down_write(&F2FS_I(inode)->i_mmap_sem);
1395 ret = truncate_blocks(inode, i_size_read(inode), true);
1396 if (ret)
1397 goto out;
1398
1399 /* write out all dirty pages from offset */
1400 ret = filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX);
1401 if (ret)
1402 goto out;
1403
1404 truncate_pagecache(inode, offset);
1405
1406 pg_start = offset >> PAGE_SHIFT;
1407 pg_end = (offset + len) >> PAGE_SHIFT;
1408 delta = pg_end - pg_start;
1409 idx = (i_size_read(inode) + PAGE_SIZE - 1) / PAGE_SIZE;
1410
1411 while (!ret && idx > pg_start) {
1412 nr = idx - pg_start;
1413 if (nr > delta)
1414 nr = delta;
1415 idx -= nr;
1416
1417 f2fs_lock_op(sbi);
1418 f2fs_drop_extent_tree(inode);
1419
1420 ret = __exchange_data_block(inode, inode, idx,
1421 idx + delta, nr, false);
1422 f2fs_unlock_op(sbi);
1423 }
1424
1425 /* write out all moved pages, if possible */
1426 filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX);
1427 truncate_pagecache(inode, offset);
1428
1429 if (!ret)
1430 f2fs_i_size_write(inode, new_size);
1431out:
1432 up_write(&F2FS_I(inode)->i_mmap_sem);
1433 up_write(&F2FS_I(inode)->dio_rwsem[WRITE]);
1434 return ret;
1435}
1436
1437static int expand_inode_data(struct inode *inode, loff_t offset,
1438 loff_t len, int mode)
1439{
1440 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1441 struct f2fs_map_blocks map = { .m_next_pgofs = NULL,
1442 .m_next_extent = NULL, .m_seg_type = NO_CHECK_TYPE };
1443 pgoff_t pg_end;
1444 loff_t new_size = i_size_read(inode);
1445 loff_t off_end;
1446 int err;
1447
1448 err = inode_newsize_ok(inode, (len + offset));
1449 if (err)
1450 return err;
1451
1452 err = f2fs_convert_inline_inode(inode);
1453 if (err)
1454 return err;
1455
1456 f2fs_balance_fs(sbi, true);
1457
1458 pg_end = ((unsigned long long)offset + len) >> PAGE_SHIFT;
1459 off_end = (offset + len) & (PAGE_SIZE - 1);
1460
1461 map.m_lblk = ((unsigned long long)offset) >> PAGE_SHIFT;
1462 map.m_len = pg_end - map.m_lblk;
1463 if (off_end)
1464 map.m_len++;
1465
1466 err = f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_PRE_AIO);
1467 if (err) {
1468 pgoff_t last_off;
1469
1470 if (!map.m_len)
1471 return err;
1472
1473 last_off = map.m_lblk + map.m_len - 1;
1474
1475 /* update new size to the failed position */
1476 new_size = (last_off == pg_end) ? offset + len:
1477 (loff_t)(last_off + 1) << PAGE_SHIFT;
1478 } else {
1479 new_size = ((loff_t)pg_end << PAGE_SHIFT) + off_end;
1480 }
1481
1482 if (new_size > i_size_read(inode)) {
1483 if (mode & FALLOC_FL_KEEP_SIZE)
1484 file_set_keep_isize(inode);
1485 else
1486 f2fs_i_size_write(inode, new_size);
1487 }
1488
1489 return err;
1490}
1491
1492static long f2fs_fallocate(struct file *file, int mode,
1493 loff_t offset, loff_t len)
1494{
1495 struct inode *inode = file_inode(file);
1496 long ret = 0;
1497
1498 if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
1499 return -EIO;
1500
1501 /* f2fs only support ->fallocate for regular file */
1502 if (!S_ISREG(inode->i_mode))
1503 return -EINVAL;
1504
1505 if (f2fs_encrypted_inode(inode) &&
1506 (mode & (FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_INSERT_RANGE)))
1507 return -EOPNOTSUPP;
1508
1509 if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE |
1510 FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_ZERO_RANGE |
1511 FALLOC_FL_INSERT_RANGE))
1512 return -EOPNOTSUPP;
1513
1514 inode_lock(inode);
1515
1516 if (mode & FALLOC_FL_PUNCH_HOLE) {
1517 if (offset >= inode->i_size)
1518 goto out;
1519
1520 ret = punch_hole(inode, offset, len);
1521 } else if (mode & FALLOC_FL_COLLAPSE_RANGE) {
1522 ret = f2fs_collapse_range(inode, offset, len);
1523 } else if (mode & FALLOC_FL_ZERO_RANGE) {
1524 ret = f2fs_zero_range(inode, offset, len, mode);
1525 } else if (mode & FALLOC_FL_INSERT_RANGE) {
1526 ret = f2fs_insert_range(inode, offset, len);
1527 } else {
1528 ret = expand_inode_data(inode, offset, len, mode);
1529 }
1530
1531 if (!ret) {
1532 inode->i_mtime = inode->i_ctime = current_time(inode);
1533 f2fs_mark_inode_dirty_sync(inode, false);
1534 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
1535 }
1536
1537out:
1538 inode_unlock(inode);
1539
1540 trace_f2fs_fallocate(inode, mode, offset, len, ret);
1541 return ret;
1542}
1543
1544static int f2fs_release_file(struct inode *inode, struct file *filp)
1545{
1546 /*
1547 * f2fs_relase_file is called at every close calls. So we should
1548 * not drop any inmemory pages by close called by other process.
1549 */
1550 if (!(filp->f_mode & FMODE_WRITE) ||
1551 atomic_read(&inode->i_writecount) != 1)
1552 return 0;
1553
1554 /* some remained atomic pages should discarded */
1555 if (f2fs_is_atomic_file(inode))
1556 drop_inmem_pages(inode);
1557 if (f2fs_is_volatile_file(inode)) {
1558 clear_inode_flag(inode, FI_VOLATILE_FILE);
1559 stat_dec_volatile_write(inode);
1560 set_inode_flag(inode, FI_DROP_CACHE);
1561 filemap_fdatawrite(inode->i_mapping);
1562 clear_inode_flag(inode, FI_DROP_CACHE);
1563 }
1564 return 0;
1565}
1566
1567static int f2fs_file_flush(struct file *file, fl_owner_t id)
1568{
1569 struct inode *inode = file_inode(file);
1570
1571 /*
1572 * If the process doing a transaction is crashed, we should do
1573 * roll-back. Otherwise, other reader/write can see corrupted database
1574 * until all the writers close its file. Since this should be done
1575 * before dropping file lock, it needs to do in ->flush.
1576 */
1577 if (f2fs_is_atomic_file(inode) &&
1578 F2FS_I(inode)->inmem_task == current)
1579 drop_inmem_pages(inode);
1580 return 0;
1581}
1582
1583static int f2fs_ioc_getflags(struct file *filp, unsigned long arg)
1584{
1585 struct inode *inode = file_inode(filp);
1586 struct f2fs_inode_info *fi = F2FS_I(inode);
1587 unsigned int flags = fi->i_flags &
1588 (FS_FL_USER_VISIBLE | FS_PROJINHERIT_FL);
1589 return put_user(flags, (int __user *)arg);
1590}
1591
1592static int __f2fs_ioc_setflags(struct inode *inode, unsigned int flags)
1593{
1594 struct f2fs_inode_info *fi = F2FS_I(inode);
1595 unsigned int oldflags;
1596
1597 /* Is it quota file? Do not allow user to mess with it */
1598 if (IS_NOQUOTA(inode))
1599 return -EPERM;
1600
1601 flags = f2fs_mask_flags(inode->i_mode, flags);
1602
1603 oldflags = fi->i_flags;
1604
1605 if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL))
1606 if (!capable(CAP_LINUX_IMMUTABLE))
1607 return -EPERM;
1608
1609 flags = flags & (FS_FL_USER_MODIFIABLE | FS_PROJINHERIT_FL);
1610 flags |= oldflags & ~(FS_FL_USER_MODIFIABLE | FS_PROJINHERIT_FL);
1611 fi->i_flags = flags;
1612
1613 if (fi->i_flags & FS_PROJINHERIT_FL)
1614 set_inode_flag(inode, FI_PROJ_INHERIT);
1615 else
1616 clear_inode_flag(inode, FI_PROJ_INHERIT);
1617
1618 inode->i_ctime = current_time(inode);
1619 f2fs_set_inode_flags(inode);
1620 f2fs_mark_inode_dirty_sync(inode, false);
1621 return 0;
1622}
1623
1624static int f2fs_ioc_setflags(struct file *filp, unsigned long arg)
1625{
1626 struct inode *inode = file_inode(filp);
1627 unsigned int flags;
1628 int ret;
1629
1630 if (!inode_owner_or_capable(inode))
1631 return -EACCES;
1632
1633 if (get_user(flags, (int __user *)arg))
1634 return -EFAULT;
1635
1636 ret = mnt_want_write_file(filp);
1637 if (ret)
1638 return ret;
1639
1640 inode_lock(inode);
1641
1642 ret = __f2fs_ioc_setflags(inode, flags);
1643
1644 inode_unlock(inode);
1645 mnt_drop_write_file(filp);
1646 return ret;
1647}
1648
1649static int f2fs_ioc_getversion(struct file *filp, unsigned long arg)
1650{
1651 struct inode *inode = file_inode(filp);
1652
1653 return put_user(inode->i_generation, (int __user *)arg);
1654}
1655
1656static int f2fs_ioc_start_atomic_write(struct file *filp)
1657{
1658 struct inode *inode = file_inode(filp);
1659 int ret;
1660
1661 if (!inode_owner_or_capable(inode))
1662 return -EACCES;
1663
1664 if (!S_ISREG(inode->i_mode))
1665 return -EINVAL;
1666
1667 ret = mnt_want_write_file(filp);
1668 if (ret)
1669 return ret;
1670
1671 inode_lock(inode);
1672
1673 if (f2fs_is_atomic_file(inode))
1674 goto out;
1675
1676 ret = f2fs_convert_inline_inode(inode);
1677 if (ret)
1678 goto out;
1679
1680 set_inode_flag(inode, FI_ATOMIC_FILE);
1681 set_inode_flag(inode, FI_HOT_DATA);
1682 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
1683
1684 if (!get_dirty_pages(inode))
1685 goto inc_stat;
1686
1687 f2fs_msg(F2FS_I_SB(inode)->sb, KERN_WARNING,
1688 "Unexpected flush for atomic writes: ino=%lu, npages=%u",
1689 inode->i_ino, get_dirty_pages(inode));
1690 ret = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX);
1691 if (ret) {
1692 clear_inode_flag(inode, FI_ATOMIC_FILE);
1693 clear_inode_flag(inode, FI_HOT_DATA);
1694 goto out;
1695 }
1696
1697inc_stat:
1698 F2FS_I(inode)->inmem_task = current;
1699 stat_inc_atomic_write(inode);
1700 stat_update_max_atomic_write(inode);
1701out:
1702 inode_unlock(inode);
1703 mnt_drop_write_file(filp);
1704 return ret;
1705}
1706
1707static int f2fs_ioc_commit_atomic_write(struct file *filp)
1708{
1709 struct inode *inode = file_inode(filp);
1710 int ret;
1711
1712 if (!inode_owner_or_capable(inode))
1713 return -EACCES;
1714
1715 ret = mnt_want_write_file(filp);
1716 if (ret)
1717 return ret;
1718
1719 inode_lock(inode);
1720
1721 down_write(&F2FS_I(inode)->dio_rwsem[WRITE]);
1722
1723 if (f2fs_is_volatile_file(inode))
1724 goto err_out;
1725
1726 if (f2fs_is_atomic_file(inode)) {
1727 ret = commit_inmem_pages(inode);
1728 if (ret)
1729 goto err_out;
1730
1731 ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 0, true);
1732 if (!ret) {
1733 clear_inode_flag(inode, FI_ATOMIC_FILE);
1734 clear_inode_flag(inode, FI_HOT_DATA);
1735 stat_dec_atomic_write(inode);
1736 }
1737 } else {
1738 ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 1, false);
1739 }
1740err_out:
1741 up_write(&F2FS_I(inode)->dio_rwsem[WRITE]);
1742 inode_unlock(inode);
1743 mnt_drop_write_file(filp);
1744 return ret;
1745}
1746
1747static int f2fs_ioc_start_volatile_write(struct file *filp)
1748{
1749 struct inode *inode = file_inode(filp);
1750 int ret;
1751
1752 if (!inode_owner_or_capable(inode))
1753 return -EACCES;
1754
1755 if (!S_ISREG(inode->i_mode))
1756 return -EINVAL;
1757
1758 ret = mnt_want_write_file(filp);
1759 if (ret)
1760 return ret;
1761
1762 inode_lock(inode);
1763
1764 if (f2fs_is_volatile_file(inode))
1765 goto out;
1766
1767 ret = f2fs_convert_inline_inode(inode);
1768 if (ret)
1769 goto out;
1770
1771 stat_inc_volatile_write(inode);
1772 stat_update_max_volatile_write(inode);
1773
1774 set_inode_flag(inode, FI_VOLATILE_FILE);
1775 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
1776out:
1777 inode_unlock(inode);
1778 mnt_drop_write_file(filp);
1779 return ret;
1780}
1781
1782static int f2fs_ioc_release_volatile_write(struct file *filp)
1783{
1784 struct inode *inode = file_inode(filp);
1785 int ret;
1786
1787 if (!inode_owner_or_capable(inode))
1788 return -EACCES;
1789
1790 ret = mnt_want_write_file(filp);
1791 if (ret)
1792 return ret;
1793
1794 inode_lock(inode);
1795
1796 if (!f2fs_is_volatile_file(inode))
1797 goto out;
1798
1799 if (!f2fs_is_first_block_written(inode)) {
1800 ret = truncate_partial_data_page(inode, 0, true);
1801 goto out;
1802 }
1803
1804 ret = punch_hole(inode, 0, F2FS_BLKSIZE);
1805out:
1806 inode_unlock(inode);
1807 mnt_drop_write_file(filp);
1808 return ret;
1809}
1810
1811static int f2fs_ioc_abort_volatile_write(struct file *filp)
1812{
1813 struct inode *inode = file_inode(filp);
1814 int ret;
1815
1816 if (!inode_owner_or_capable(inode))
1817 return -EACCES;
1818
1819 ret = mnt_want_write_file(filp);
1820 if (ret)
1821 return ret;
1822
1823 inode_lock(inode);
1824
1825 if (f2fs_is_atomic_file(inode))
1826 drop_inmem_pages(inode);
1827 if (f2fs_is_volatile_file(inode)) {
1828 clear_inode_flag(inode, FI_VOLATILE_FILE);
1829 stat_dec_volatile_write(inode);
1830 ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 0, true);
1831 }
1832
1833 inode_unlock(inode);
1834
1835 mnt_drop_write_file(filp);
1836 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
1837 return ret;
1838}
1839
1840static int f2fs_ioc_shutdown(struct file *filp, unsigned long arg)
1841{
1842 struct inode *inode = file_inode(filp);
1843 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1844 struct super_block *sb = sbi->sb;
1845 __u32 in;
1846 int ret;
1847
1848 if (!capable(CAP_SYS_ADMIN))
1849 return -EPERM;
1850
1851 if (get_user(in, (__u32 __user *)arg))
1852 return -EFAULT;
1853
1854 ret = mnt_want_write_file(filp);
1855 if (ret)
1856 return ret;
1857
1858 switch (in) {
1859 case F2FS_GOING_DOWN_FULLSYNC:
1860 sb = freeze_bdev(sb->s_bdev);
1861 if (IS_ERR(sb)) {
1862 ret = PTR_ERR(sb);
1863 goto out;
1864 }
1865 if (sb) {
1866 f2fs_stop_checkpoint(sbi, false);
1867 thaw_bdev(sb->s_bdev, sb);
1868 }
1869 break;
1870 case F2FS_GOING_DOWN_METASYNC:
1871 /* do checkpoint only */
1872 ret = f2fs_sync_fs(sb, 1);
1873 if (ret)
1874 goto out;
1875 f2fs_stop_checkpoint(sbi, false);
1876 break;
1877 case F2FS_GOING_DOWN_NOSYNC:
1878 f2fs_stop_checkpoint(sbi, false);
1879 break;
1880 case F2FS_GOING_DOWN_METAFLUSH:
1881 sync_meta_pages(sbi, META, LONG_MAX, FS_META_IO);
1882 f2fs_stop_checkpoint(sbi, false);
1883 break;
1884 default:
1885 ret = -EINVAL;
1886 goto out;
1887 }
1888
1889 stop_gc_thread(sbi);
1890 stop_discard_thread(sbi);
1891
1892 drop_discard_cmd(sbi);
1893 clear_opt(sbi, DISCARD);
1894
1895 f2fs_update_time(sbi, REQ_TIME);
1896out:
1897 mnt_drop_write_file(filp);
1898 return ret;
1899}
1900
1901static int f2fs_ioc_fitrim(struct file *filp, unsigned long arg)
1902{
1903 struct inode *inode = file_inode(filp);
1904 struct super_block *sb = inode->i_sb;
1905 struct request_queue *q = bdev_get_queue(sb->s_bdev);
1906 struct fstrim_range range;
1907 int ret;
1908
1909 if (!capable(CAP_SYS_ADMIN))
1910 return -EPERM;
1911
1912 if (!blk_queue_discard(q))
1913 return -EOPNOTSUPP;
1914
1915 if (copy_from_user(&range, (struct fstrim_range __user *)arg,
1916 sizeof(range)))
1917 return -EFAULT;
1918
1919 ret = mnt_want_write_file(filp);
1920 if (ret)
1921 return ret;
1922
1923 range.minlen = max((unsigned int)range.minlen,
1924 q->limits.discard_granularity);
1925 ret = f2fs_trim_fs(F2FS_SB(sb), &range);
1926 mnt_drop_write_file(filp);
1927 if (ret < 0)
1928 return ret;
1929
1930 if (copy_to_user((struct fstrim_range __user *)arg, &range,
1931 sizeof(range)))
1932 return -EFAULT;
1933 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
1934 return 0;
1935}
1936
1937static bool uuid_is_nonzero(__u8 u[16])
1938{
1939 int i;
1940
1941 for (i = 0; i < 16; i++)
1942 if (u[i])
1943 return true;
1944 return false;
1945}
1946
1947static int f2fs_ioc_set_encryption_policy(struct file *filp, unsigned long arg)
1948{
1949 struct inode *inode = file_inode(filp);
1950
1951 if (!f2fs_sb_has_encrypt(inode->i_sb))
1952 return -EOPNOTSUPP;
1953
1954 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
1955
1956 return fscrypt_ioctl_set_policy(filp, (const void __user *)arg);
1957}
1958
1959static int f2fs_ioc_get_encryption_policy(struct file *filp, unsigned long arg)
1960{
1961 if (!f2fs_sb_has_encrypt(file_inode(filp)->i_sb))
1962 return -EOPNOTSUPP;
1963 return fscrypt_ioctl_get_policy(filp, (void __user *)arg);
1964}
1965
1966static int f2fs_ioc_get_encryption_pwsalt(struct file *filp, unsigned long arg)
1967{
1968 struct inode *inode = file_inode(filp);
1969 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1970 int err;
1971
1972 if (!f2fs_sb_has_encrypt(inode->i_sb))
1973 return -EOPNOTSUPP;
1974
1975 err = mnt_want_write_file(filp);
1976 if (err)
1977 return err;
1978
1979 down_write(&sbi->sb_lock);
1980
1981 if (uuid_is_nonzero(sbi->raw_super->encrypt_pw_salt))
1982 goto got_it;
1983
1984 /* update superblock with uuid */
1985 generate_random_uuid(sbi->raw_super->encrypt_pw_salt);
1986
1987 err = f2fs_commit_super(sbi, false);
1988 if (err) {
1989 /* undo new data */
1990 memset(sbi->raw_super->encrypt_pw_salt, 0, 16);
1991 goto out_err;
1992 }
1993got_it:
1994 if (copy_to_user((__u8 __user *)arg, sbi->raw_super->encrypt_pw_salt,
1995 16))
1996 err = -EFAULT;
1997out_err:
1998 up_write(&sbi->sb_lock);
1999 mnt_drop_write_file(filp);
2000 return err;
2001}
2002
2003static int f2fs_ioc_gc(struct file *filp, unsigned long arg)
2004{
2005 struct inode *inode = file_inode(filp);
2006 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2007 __u32 sync;
2008 int ret;
2009
2010 if (!capable(CAP_SYS_ADMIN))
2011 return -EPERM;
2012
2013 if (get_user(sync, (__u32 __user *)arg))
2014 return -EFAULT;
2015
2016 if (f2fs_readonly(sbi->sb))
2017 return -EROFS;
2018
2019 ret = mnt_want_write_file(filp);
2020 if (ret)
2021 return ret;
2022
2023 if (!sync) {
2024 if (!mutex_trylock(&sbi->gc_mutex)) {
2025 ret = -EBUSY;
2026 goto out;
2027 }
2028 } else {
2029 mutex_lock(&sbi->gc_mutex);
2030 }
2031
2032 ret = f2fs_gc(sbi, sync, true, NULL_SEGNO);
2033out:
2034 mnt_drop_write_file(filp);
2035 return ret;
2036}
2037
2038static int f2fs_ioc_gc_range(struct file *filp, unsigned long arg)
2039{
2040 struct inode *inode = file_inode(filp);
2041 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2042 struct f2fs_gc_range range;
2043 u64 end;
2044 int ret;
2045
2046 if (!capable(CAP_SYS_ADMIN))
2047 return -EPERM;
2048
2049 if (copy_from_user(&range, (struct f2fs_gc_range __user *)arg,
2050 sizeof(range)))
2051 return -EFAULT;
2052
2053 if (f2fs_readonly(sbi->sb))
2054 return -EROFS;
2055
2056 ret = mnt_want_write_file(filp);
2057 if (ret)
2058 return ret;
2059
2060 end = range.start + range.len;
2061 if (range.start < MAIN_BLKADDR(sbi) || end >= MAX_BLKADDR(sbi)) {
2062 ret = -EINVAL;
2063 goto out;
2064 }
2065do_more:
2066 if (!range.sync) {
2067 if (!mutex_trylock(&sbi->gc_mutex)) {
2068 ret = -EBUSY;
2069 goto out;
2070 }
2071 } else {
2072 mutex_lock(&sbi->gc_mutex);
2073 }
2074
2075 ret = f2fs_gc(sbi, range.sync, true, GET_SEGNO(sbi, range.start));
2076 range.start += sbi->blocks_per_seg;
2077 if (range.start <= end)
2078 goto do_more;
2079out:
2080 mnt_drop_write_file(filp);
2081 return ret;
2082}
2083
2084static int f2fs_ioc_write_checkpoint(struct file *filp, unsigned long arg)
2085{
2086 struct inode *inode = file_inode(filp);
2087 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2088 int ret;
2089
2090 if (!capable(CAP_SYS_ADMIN))
2091 return -EPERM;
2092
2093 if (f2fs_readonly(sbi->sb))
2094 return -EROFS;
2095
2096 ret = mnt_want_write_file(filp);
2097 if (ret)
2098 return ret;
2099
2100 ret = f2fs_sync_fs(sbi->sb, 1);
2101
2102 mnt_drop_write_file(filp);
2103 return ret;
2104}
2105
2106static int f2fs_defragment_range(struct f2fs_sb_info *sbi,
2107 struct file *filp,
2108 struct f2fs_defragment *range)
2109{
2110 struct inode *inode = file_inode(filp);
2111 struct f2fs_map_blocks map = { .m_next_extent = NULL,
2112 .m_seg_type = NO_CHECK_TYPE };
2113 struct extent_info ei = {0,0,0};
2114 pgoff_t pg_start, pg_end, next_pgofs;
2115 unsigned int blk_per_seg = sbi->blocks_per_seg;
2116 unsigned int total = 0, sec_num;
2117 block_t blk_end = 0;
2118 bool fragmented = false;
2119 int err;
2120
2121 /* if in-place-update policy is enabled, don't waste time here */
2122 if (should_update_inplace(inode, NULL))
2123 return -EINVAL;
2124
2125 pg_start = range->start >> PAGE_SHIFT;
2126 pg_end = (range->start + range->len) >> PAGE_SHIFT;
2127
2128 f2fs_balance_fs(sbi, true);
2129
2130 inode_lock(inode);
2131
2132 /* writeback all dirty pages in the range */
2133 err = filemap_write_and_wait_range(inode->i_mapping, range->start,
2134 range->start + range->len - 1);
2135 if (err)
2136 goto out;
2137
2138 /*
2139 * lookup mapping info in extent cache, skip defragmenting if physical
2140 * block addresses are continuous.
2141 */
2142 if (f2fs_lookup_extent_cache(inode, pg_start, &ei)) {
2143 if (ei.fofs + ei.len >= pg_end)
2144 goto out;
2145 }
2146
2147 map.m_lblk = pg_start;
2148 map.m_next_pgofs = &next_pgofs;
2149
2150 /*
2151 * lookup mapping info in dnode page cache, skip defragmenting if all
2152 * physical block addresses are continuous even if there are hole(s)
2153 * in logical blocks.
2154 */
2155 while (map.m_lblk < pg_end) {
2156 map.m_len = pg_end - map.m_lblk;
2157 err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_DEFAULT);
2158 if (err)
2159 goto out;
2160
2161 if (!(map.m_flags & F2FS_MAP_FLAGS)) {
2162 map.m_lblk = next_pgofs;
2163 continue;
2164 }
2165
2166 if (blk_end && blk_end != map.m_pblk)
2167 fragmented = true;
2168
2169 /* record total count of block that we're going to move */
2170 total += map.m_len;
2171
2172 blk_end = map.m_pblk + map.m_len;
2173
2174 map.m_lblk += map.m_len;
2175 }
2176
2177 if (!fragmented)
2178 goto out;
2179
2180 sec_num = (total + BLKS_PER_SEC(sbi) - 1) / BLKS_PER_SEC(sbi);
2181
2182 /*
2183 * make sure there are enough free section for LFS allocation, this can
2184 * avoid defragment running in SSR mode when free section are allocated
2185 * intensively
2186 */
2187 if (has_not_enough_free_secs(sbi, 0, sec_num)) {
2188 err = -EAGAIN;
2189 goto out;
2190 }
2191
2192 map.m_lblk = pg_start;
2193 map.m_len = pg_end - pg_start;
2194 total = 0;
2195
2196 while (map.m_lblk < pg_end) {
2197 pgoff_t idx;
2198 int cnt = 0;
2199
2200do_map:
2201 map.m_len = pg_end - map.m_lblk;
2202 err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_DEFAULT);
2203 if (err)
2204 goto clear_out;
2205
2206 if (!(map.m_flags & F2FS_MAP_FLAGS)) {
2207 map.m_lblk = next_pgofs;
2208 continue;
2209 }
2210
2211 set_inode_flag(inode, FI_DO_DEFRAG);
2212
2213 idx = map.m_lblk;
2214 while (idx < map.m_lblk + map.m_len && cnt < blk_per_seg) {
2215 struct page *page;
2216
2217 page = get_lock_data_page(inode, idx, true);
2218 if (IS_ERR(page)) {
2219 err = PTR_ERR(page);
2220 goto clear_out;
2221 }
2222
2223 set_page_dirty(page);
2224 f2fs_put_page(page, 1);
2225
2226 idx++;
2227 cnt++;
2228 total++;
2229 }
2230
2231 map.m_lblk = idx;
2232
2233 if (idx < pg_end && cnt < blk_per_seg)
2234 goto do_map;
2235
2236 clear_inode_flag(inode, FI_DO_DEFRAG);
2237
2238 err = filemap_fdatawrite(inode->i_mapping);
2239 if (err)
2240 goto out;
2241 }
2242clear_out:
2243 clear_inode_flag(inode, FI_DO_DEFRAG);
2244out:
2245 inode_unlock(inode);
2246 if (!err)
2247 range->len = (u64)total << PAGE_SHIFT;
2248 return err;
2249}
2250
2251static int f2fs_ioc_defragment(struct file *filp, unsigned long arg)
2252{
2253 struct inode *inode = file_inode(filp);
2254 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2255 struct f2fs_defragment range;
2256 int err;
2257
2258 if (!capable(CAP_SYS_ADMIN))
2259 return -EPERM;
2260
2261 if (!S_ISREG(inode->i_mode) || f2fs_is_atomic_file(inode))
2262 return -EINVAL;
2263
2264 if (f2fs_readonly(sbi->sb))
2265 return -EROFS;
2266
2267 if (copy_from_user(&range, (struct f2fs_defragment __user *)arg,
2268 sizeof(range)))
2269 return -EFAULT;
2270
2271 /* verify alignment of offset & size */
2272 if (range.start & (F2FS_BLKSIZE - 1) || range.len & (F2FS_BLKSIZE - 1))
2273 return -EINVAL;
2274
2275 if (unlikely((range.start + range.len) >> PAGE_SHIFT >
2276 sbi->max_file_blocks))
2277 return -EINVAL;
2278
2279 err = mnt_want_write_file(filp);
2280 if (err)
2281 return err;
2282
2283 err = f2fs_defragment_range(sbi, filp, &range);
2284 mnt_drop_write_file(filp);
2285
2286 f2fs_update_time(sbi, REQ_TIME);
2287 if (err < 0)
2288 return err;
2289
2290 if (copy_to_user((struct f2fs_defragment __user *)arg, &range,
2291 sizeof(range)))
2292 return -EFAULT;
2293
2294 return 0;
2295}
2296
2297static int f2fs_move_file_range(struct file *file_in, loff_t pos_in,
2298 struct file *file_out, loff_t pos_out, size_t len)
2299{
2300 struct inode *src = file_inode(file_in);
2301 struct inode *dst = file_inode(file_out);
2302 struct f2fs_sb_info *sbi = F2FS_I_SB(src);
2303 size_t olen = len, dst_max_i_size = 0;
2304 size_t dst_osize;
2305 int ret;
2306
2307 if (file_in->f_path.mnt != file_out->f_path.mnt ||
2308 src->i_sb != dst->i_sb)
2309 return -EXDEV;
2310
2311 if (unlikely(f2fs_readonly(src->i_sb)))
2312 return -EROFS;
2313
2314 if (!S_ISREG(src->i_mode) || !S_ISREG(dst->i_mode))
2315 return -EINVAL;
2316
2317 if (f2fs_encrypted_inode(src) || f2fs_encrypted_inode(dst))
2318 return -EOPNOTSUPP;
2319
2320 if (src == dst) {
2321 if (pos_in == pos_out)
2322 return 0;
2323 if (pos_out > pos_in && pos_out < pos_in + len)
2324 return -EINVAL;
2325 }
2326
2327 inode_lock(src);
2328 down_write(&F2FS_I(src)->dio_rwsem[WRITE]);
2329 if (src != dst) {
2330 ret = -EBUSY;
2331 if (!inode_trylock(dst))
2332 goto out;
2333 if (!down_write_trylock(&F2FS_I(dst)->dio_rwsem[WRITE])) {
2334 inode_unlock(dst);
2335 goto out;
2336 }
2337 }
2338
2339 ret = -EINVAL;
2340 if (pos_in + len > src->i_size || pos_in + len < pos_in)
2341 goto out_unlock;
2342 if (len == 0)
2343 olen = len = src->i_size - pos_in;
2344 if (pos_in + len == src->i_size)
2345 len = ALIGN(src->i_size, F2FS_BLKSIZE) - pos_in;
2346 if (len == 0) {
2347 ret = 0;
2348 goto out_unlock;
2349 }
2350
2351 dst_osize = dst->i_size;
2352 if (pos_out + olen > dst->i_size)
2353 dst_max_i_size = pos_out + olen;
2354
2355 /* verify the end result is block aligned */
2356 if (!IS_ALIGNED(pos_in, F2FS_BLKSIZE) ||
2357 !IS_ALIGNED(pos_in + len, F2FS_BLKSIZE) ||
2358 !IS_ALIGNED(pos_out, F2FS_BLKSIZE))
2359 goto out_unlock;
2360
2361 ret = f2fs_convert_inline_inode(src);
2362 if (ret)
2363 goto out_unlock;
2364
2365 ret = f2fs_convert_inline_inode(dst);
2366 if (ret)
2367 goto out_unlock;
2368
2369 /* write out all dirty pages from offset */
2370 ret = filemap_write_and_wait_range(src->i_mapping,
2371 pos_in, pos_in + len);
2372 if (ret)
2373 goto out_unlock;
2374
2375 ret = filemap_write_and_wait_range(dst->i_mapping,
2376 pos_out, pos_out + len);
2377 if (ret)
2378 goto out_unlock;
2379
2380 f2fs_balance_fs(sbi, true);
2381 f2fs_lock_op(sbi);
2382 ret = __exchange_data_block(src, dst, pos_in >> F2FS_BLKSIZE_BITS,
2383 pos_out >> F2FS_BLKSIZE_BITS,
2384 len >> F2FS_BLKSIZE_BITS, false);
2385
2386 if (!ret) {
2387 if (dst_max_i_size)
2388 f2fs_i_size_write(dst, dst_max_i_size);
2389 else if (dst_osize != dst->i_size)
2390 f2fs_i_size_write(dst, dst_osize);
2391 }
2392 f2fs_unlock_op(sbi);
2393out_unlock:
2394 if (src != dst) {
2395 up_write(&F2FS_I(dst)->dio_rwsem[WRITE]);
2396 inode_unlock(dst);
2397 }
2398out:
2399 up_write(&F2FS_I(src)->dio_rwsem[WRITE]);
2400 inode_unlock(src);
2401 return ret;
2402}
2403
2404static int f2fs_ioc_move_range(struct file *filp, unsigned long arg)
2405{
2406 struct f2fs_move_range range;
2407 struct fd dst;
2408 int err;
2409
2410 if (!(filp->f_mode & FMODE_READ) ||
2411 !(filp->f_mode & FMODE_WRITE))
2412 return -EBADF;
2413
2414 if (copy_from_user(&range, (struct f2fs_move_range __user *)arg,
2415 sizeof(range)))
2416 return -EFAULT;
2417
2418 dst = fdget(range.dst_fd);
2419 if (!dst.file)
2420 return -EBADF;
2421
2422 if (!(dst.file->f_mode & FMODE_WRITE)) {
2423 err = -EBADF;
2424 goto err_out;
2425 }
2426
2427 err = mnt_want_write_file(filp);
2428 if (err)
2429 goto err_out;
2430
2431 err = f2fs_move_file_range(filp, range.pos_in, dst.file,
2432 range.pos_out, range.len);
2433
2434 mnt_drop_write_file(filp);
2435 if (err)
2436 goto err_out;
2437
2438 if (copy_to_user((struct f2fs_move_range __user *)arg,
2439 &range, sizeof(range)))
2440 err = -EFAULT;
2441err_out:
2442 fdput(dst);
2443 return err;
2444}
2445
2446static int f2fs_ioc_flush_device(struct file *filp, unsigned long arg)
2447{
2448 struct inode *inode = file_inode(filp);
2449 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2450 struct sit_info *sm = SIT_I(sbi);
2451 unsigned int start_segno = 0, end_segno = 0;
2452 unsigned int dev_start_segno = 0, dev_end_segno = 0;
2453 struct f2fs_flush_device range;
2454 int ret;
2455
2456 if (!capable(CAP_SYS_ADMIN))
2457 return -EPERM;
2458
2459 if (f2fs_readonly(sbi->sb))
2460 return -EROFS;
2461
2462 if (copy_from_user(&range, (struct f2fs_flush_device __user *)arg,
2463 sizeof(range)))
2464 return -EFAULT;
2465
2466 if (sbi->s_ndevs <= 1 || sbi->s_ndevs - 1 <= range.dev_num ||
2467 sbi->segs_per_sec != 1) {
2468 f2fs_msg(sbi->sb, KERN_WARNING,
2469 "Can't flush %u in %d for segs_per_sec %u != 1\n",
2470 range.dev_num, sbi->s_ndevs,
2471 sbi->segs_per_sec);
2472 return -EINVAL;
2473 }
2474
2475 ret = mnt_want_write_file(filp);
2476 if (ret)
2477 return ret;
2478
2479 if (range.dev_num != 0)
2480 dev_start_segno = GET_SEGNO(sbi, FDEV(range.dev_num).start_blk);
2481 dev_end_segno = GET_SEGNO(sbi, FDEV(range.dev_num).end_blk);
2482
2483 start_segno = sm->last_victim[FLUSH_DEVICE];
2484 if (start_segno < dev_start_segno || start_segno >= dev_end_segno)
2485 start_segno = dev_start_segno;
2486 end_segno = min(start_segno + range.segments, dev_end_segno);
2487
2488 while (start_segno < end_segno) {
2489 if (!mutex_trylock(&sbi->gc_mutex)) {
2490 ret = -EBUSY;
2491 goto out;
2492 }
2493 sm->last_victim[GC_CB] = end_segno + 1;
2494 sm->last_victim[GC_GREEDY] = end_segno + 1;
2495 sm->last_victim[ALLOC_NEXT] = end_segno + 1;
2496 ret = f2fs_gc(sbi, true, true, start_segno);
2497 if (ret == -EAGAIN)
2498 ret = 0;
2499 else if (ret < 0)
2500 break;
2501 start_segno++;
2502 }
2503out:
2504 mnt_drop_write_file(filp);
2505 return ret;
2506}
2507
2508static int f2fs_ioc_get_features(struct file *filp, unsigned long arg)
2509{
2510 struct inode *inode = file_inode(filp);
2511 u32 sb_feature = le32_to_cpu(F2FS_I_SB(inode)->raw_super->feature);
2512
2513 /* Must validate to set it with SQLite behavior in Android. */
2514 sb_feature |= F2FS_FEATURE_ATOMIC_WRITE;
2515
2516 return put_user(sb_feature, (u32 __user *)arg);
2517}
2518
2519#ifdef CONFIG_QUOTA
2520static int f2fs_ioc_setproject(struct file *filp, __u32 projid)
2521{
2522 struct inode *inode = file_inode(filp);
2523 struct f2fs_inode_info *fi = F2FS_I(inode);
2524 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2525 struct super_block *sb = sbi->sb;
2526 struct dquot *transfer_to[MAXQUOTAS] = {};
2527 struct page *ipage;
2528 kprojid_t kprojid;
2529 int err;
2530
2531 if (!f2fs_sb_has_project_quota(sb)) {
2532 if (projid != F2FS_DEF_PROJID)
2533 return -EOPNOTSUPP;
2534 else
2535 return 0;
2536 }
2537
2538 if (!f2fs_has_extra_attr(inode))
2539 return -EOPNOTSUPP;
2540
2541 kprojid = make_kprojid(&init_user_ns, (projid_t)projid);
2542
2543 if (projid_eq(kprojid, F2FS_I(inode)->i_projid))
2544 return 0;
2545
2546 err = mnt_want_write_file(filp);
2547 if (err)
2548 return err;
2549
2550 err = -EPERM;
2551 inode_lock(inode);
2552
2553 /* Is it quota file? Do not allow user to mess with it */
2554 if (IS_NOQUOTA(inode))
2555 goto out_unlock;
2556
2557 ipage = get_node_page(sbi, inode->i_ino);
2558 if (IS_ERR(ipage)) {
2559 err = PTR_ERR(ipage);
2560 goto out_unlock;
2561 }
2562
2563 if (!F2FS_FITS_IN_INODE(F2FS_INODE(ipage), fi->i_extra_isize,
2564 i_projid)) {
2565 err = -EOVERFLOW;
2566 f2fs_put_page(ipage, 1);
2567 goto out_unlock;
2568 }
2569 f2fs_put_page(ipage, 1);
2570
2571 dquot_initialize(inode);
2572
2573 transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid));
2574 if (!IS_ERR(transfer_to[PRJQUOTA])) {
2575 err = __dquot_transfer(inode, transfer_to);
2576 dqput(transfer_to[PRJQUOTA]);
2577 if (err)
2578 goto out_dirty;
2579 }
2580
2581 F2FS_I(inode)->i_projid = kprojid;
2582 inode->i_ctime = current_time(inode);
2583out_dirty:
2584 f2fs_mark_inode_dirty_sync(inode, true);
2585out_unlock:
2586 inode_unlock(inode);
2587 mnt_drop_write_file(filp);
2588 return err;
2589}
2590#else
2591static int f2fs_ioc_setproject(struct file *filp, __u32 projid)
2592{
2593 if (projid != F2FS_DEF_PROJID)
2594 return -EOPNOTSUPP;
2595 return 0;
2596}
2597#endif
2598
2599/* Transfer internal flags to xflags */
2600static inline __u32 f2fs_iflags_to_xflags(unsigned long iflags)
2601{
2602 __u32 xflags = 0;
2603
2604 if (iflags & FS_SYNC_FL)
2605 xflags |= FS_XFLAG_SYNC;
2606 if (iflags & FS_IMMUTABLE_FL)
2607 xflags |= FS_XFLAG_IMMUTABLE;
2608 if (iflags & FS_APPEND_FL)
2609 xflags |= FS_XFLAG_APPEND;
2610 if (iflags & FS_NODUMP_FL)
2611 xflags |= FS_XFLAG_NODUMP;
2612 if (iflags & FS_NOATIME_FL)
2613 xflags |= FS_XFLAG_NOATIME;
2614 if (iflags & FS_PROJINHERIT_FL)
2615 xflags |= FS_XFLAG_PROJINHERIT;
2616 return xflags;
2617}
2618
2619#define F2FS_SUPPORTED_FS_XFLAGS (FS_XFLAG_SYNC | FS_XFLAG_IMMUTABLE | \
2620 FS_XFLAG_APPEND | FS_XFLAG_NODUMP | \
2621 FS_XFLAG_NOATIME | FS_XFLAG_PROJINHERIT)
2622
2623/* Flags we can manipulate with through EXT4_IOC_FSSETXATTR */
2624#define F2FS_FL_XFLAG_VISIBLE (FS_SYNC_FL | \
2625 FS_IMMUTABLE_FL | \
2626 FS_APPEND_FL | \
2627 FS_NODUMP_FL | \
2628 FS_NOATIME_FL | \
2629 FS_PROJINHERIT_FL)
2630
2631/* Transfer xflags flags to internal */
2632static inline unsigned long f2fs_xflags_to_iflags(__u32 xflags)
2633{
2634 unsigned long iflags = 0;
2635
2636 if (xflags & FS_XFLAG_SYNC)
2637 iflags |= FS_SYNC_FL;
2638 if (xflags & FS_XFLAG_IMMUTABLE)
2639 iflags |= FS_IMMUTABLE_FL;
2640 if (xflags & FS_XFLAG_APPEND)
2641 iflags |= FS_APPEND_FL;
2642 if (xflags & FS_XFLAG_NODUMP)
2643 iflags |= FS_NODUMP_FL;
2644 if (xflags & FS_XFLAG_NOATIME)
2645 iflags |= FS_NOATIME_FL;
2646 if (xflags & FS_XFLAG_PROJINHERIT)
2647 iflags |= FS_PROJINHERIT_FL;
2648
2649 return iflags;
2650}
2651
2652static int f2fs_ioc_fsgetxattr(struct file *filp, unsigned long arg)
2653{
2654 struct inode *inode = file_inode(filp);
2655 struct f2fs_inode_info *fi = F2FS_I(inode);
2656 struct fsxattr fa;
2657
2658 memset(&fa, 0, sizeof(struct fsxattr));
2659 fa.fsx_xflags = f2fs_iflags_to_xflags(fi->i_flags &
2660 (FS_FL_USER_VISIBLE | FS_PROJINHERIT_FL));
2661
2662 if (f2fs_sb_has_project_quota(inode->i_sb))
2663 fa.fsx_projid = (__u32)from_kprojid(&init_user_ns,
2664 fi->i_projid);
2665
2666 if (copy_to_user((struct fsxattr __user *)arg, &fa, sizeof(fa)))
2667 return -EFAULT;
2668 return 0;
2669}
2670
2671static int f2fs_ioc_fssetxattr(struct file *filp, unsigned long arg)
2672{
2673 struct inode *inode = file_inode(filp);
2674 struct f2fs_inode_info *fi = F2FS_I(inode);
2675 struct fsxattr fa;
2676 unsigned int flags;
2677 int err;
2678
2679 if (copy_from_user(&fa, (struct fsxattr __user *)arg, sizeof(fa)))
2680 return -EFAULT;
2681
2682 /* Make sure caller has proper permission */
2683 if (!inode_owner_or_capable(inode))
2684 return -EACCES;
2685
2686 if (fa.fsx_xflags & ~F2FS_SUPPORTED_FS_XFLAGS)
2687 return -EOPNOTSUPP;
2688
2689 flags = f2fs_xflags_to_iflags(fa.fsx_xflags);
2690 if (f2fs_mask_flags(inode->i_mode, flags) != flags)
2691 return -EOPNOTSUPP;
2692
2693 err = mnt_want_write_file(filp);
2694 if (err)
2695 return err;
2696
2697 inode_lock(inode);
2698 flags = (fi->i_flags & ~F2FS_FL_XFLAG_VISIBLE) |
2699 (flags & F2FS_FL_XFLAG_VISIBLE);
2700 err = __f2fs_ioc_setflags(inode, flags);
2701 inode_unlock(inode);
2702 mnt_drop_write_file(filp);
2703 if (err)
2704 return err;
2705
2706 err = f2fs_ioc_setproject(filp, fa.fsx_projid);
2707 if (err)
2708 return err;
2709
2710 return 0;
2711}
2712
2713int f2fs_pin_file_control(struct inode *inode, bool inc)
2714{
2715 struct f2fs_inode_info *fi = F2FS_I(inode);
2716 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2717
2718 /* Use i_gc_failures for normal file as a risk signal. */
2719 if (inc)
2720 f2fs_i_gc_failures_write(inode, fi->i_gc_failures + 1);
2721
2722 if (fi->i_gc_failures > sbi->gc_pin_file_threshold) {
2723 f2fs_msg(sbi->sb, KERN_WARNING,
2724 "%s: Enable GC = ino %lx after %x GC trials\n",
2725 __func__, inode->i_ino, fi->i_gc_failures);
2726 clear_inode_flag(inode, FI_PIN_FILE);
2727 return -EAGAIN;
2728 }
2729 return 0;
2730}
2731
2732static int f2fs_ioc_set_pin_file(struct file *filp, unsigned long arg)
2733{
2734 struct inode *inode = file_inode(filp);
2735 __u32 pin;
2736 int ret = 0;
2737
2738 if (!inode_owner_or_capable(inode))
2739 return -EACCES;
2740
2741 if (get_user(pin, (__u32 __user *)arg))
2742 return -EFAULT;
2743
2744 if (!S_ISREG(inode->i_mode))
2745 return -EINVAL;
2746
2747 if (f2fs_readonly(F2FS_I_SB(inode)->sb))
2748 return -EROFS;
2749
2750 ret = mnt_want_write_file(filp);
2751 if (ret)
2752 return ret;
2753
2754 inode_lock(inode);
2755
2756 if (should_update_outplace(inode, NULL)) {
2757 ret = -EINVAL;
2758 goto out;
2759 }
2760
2761 if (!pin) {
2762 clear_inode_flag(inode, FI_PIN_FILE);
2763 F2FS_I(inode)->i_gc_failures = 1;
2764 goto done;
2765 }
2766
2767 if (f2fs_pin_file_control(inode, false)) {
2768 ret = -EAGAIN;
2769 goto out;
2770 }
2771 ret = f2fs_convert_inline_inode(inode);
2772 if (ret)
2773 goto out;
2774
2775 set_inode_flag(inode, FI_PIN_FILE);
2776 ret = F2FS_I(inode)->i_gc_failures;
2777done:
2778 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
2779out:
2780 inode_unlock(inode);
2781 mnt_drop_write_file(filp);
2782 return ret;
2783}
2784
2785static int f2fs_ioc_get_pin_file(struct file *filp, unsigned long arg)
2786{
2787 struct inode *inode = file_inode(filp);
2788 __u32 pin = 0;
2789
2790 if (is_inode_flag_set(inode, FI_PIN_FILE))
2791 pin = F2FS_I(inode)->i_gc_failures;
2792 return put_user(pin, (u32 __user *)arg);
2793}
2794
2795int f2fs_precache_extents(struct inode *inode)
2796{
2797 struct f2fs_inode_info *fi = F2FS_I(inode);
2798 struct f2fs_map_blocks map;
2799 pgoff_t m_next_extent;
2800 loff_t end;
2801 int err;
2802
2803 if (is_inode_flag_set(inode, FI_NO_EXTENT))
2804 return -EOPNOTSUPP;
2805
2806 map.m_lblk = 0;
2807 map.m_next_pgofs = NULL;
2808 map.m_next_extent = &m_next_extent;
2809 map.m_seg_type = NO_CHECK_TYPE;
2810 end = F2FS_I_SB(inode)->max_file_blocks;
2811
2812 while (map.m_lblk < end) {
2813 map.m_len = end - map.m_lblk;
2814
2815 down_write(&fi->dio_rwsem[WRITE]);
2816 err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_PRECACHE);
2817 up_write(&fi->dio_rwsem[WRITE]);
2818 if (err)
2819 return err;
2820
2821 map.m_lblk = m_next_extent;
2822 }
2823
2824 return err;
2825}
2826
2827static int f2fs_ioc_precache_extents(struct file *filp, unsigned long arg)
2828{
2829 return f2fs_precache_extents(file_inode(filp));
2830}
2831
2832long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
2833{
2834 if (unlikely(f2fs_cp_error(F2FS_I_SB(file_inode(filp)))))
2835 return -EIO;
2836
2837 switch (cmd) {
2838 case F2FS_IOC_GETFLAGS:
2839 return f2fs_ioc_getflags(filp, arg);
2840 case F2FS_IOC_SETFLAGS:
2841 return f2fs_ioc_setflags(filp, arg);
2842 case F2FS_IOC_GETVERSION:
2843 return f2fs_ioc_getversion(filp, arg);
2844 case F2FS_IOC_START_ATOMIC_WRITE:
2845 return f2fs_ioc_start_atomic_write(filp);
2846 case F2FS_IOC_COMMIT_ATOMIC_WRITE:
2847 return f2fs_ioc_commit_atomic_write(filp);
2848 case F2FS_IOC_START_VOLATILE_WRITE:
2849 return f2fs_ioc_start_volatile_write(filp);
2850 case F2FS_IOC_RELEASE_VOLATILE_WRITE:
2851 return f2fs_ioc_release_volatile_write(filp);
2852 case F2FS_IOC_ABORT_VOLATILE_WRITE:
2853 return f2fs_ioc_abort_volatile_write(filp);
2854 case F2FS_IOC_SHUTDOWN:
2855 return f2fs_ioc_shutdown(filp, arg);
2856 case FITRIM:
2857 return f2fs_ioc_fitrim(filp, arg);
2858 case F2FS_IOC_SET_ENCRYPTION_POLICY:
2859 return f2fs_ioc_set_encryption_policy(filp, arg);
2860 case F2FS_IOC_GET_ENCRYPTION_POLICY:
2861 return f2fs_ioc_get_encryption_policy(filp, arg);
2862 case F2FS_IOC_GET_ENCRYPTION_PWSALT:
2863 return f2fs_ioc_get_encryption_pwsalt(filp, arg);
2864 case F2FS_IOC_GARBAGE_COLLECT:
2865 return f2fs_ioc_gc(filp, arg);
2866 case F2FS_IOC_GARBAGE_COLLECT_RANGE:
2867 return f2fs_ioc_gc_range(filp, arg);
2868 case F2FS_IOC_WRITE_CHECKPOINT:
2869 return f2fs_ioc_write_checkpoint(filp, arg);
2870 case F2FS_IOC_DEFRAGMENT:
2871 return f2fs_ioc_defragment(filp, arg);
2872 case F2FS_IOC_MOVE_RANGE:
2873 return f2fs_ioc_move_range(filp, arg);
2874 case F2FS_IOC_FLUSH_DEVICE:
2875 return f2fs_ioc_flush_device(filp, arg);
2876 case F2FS_IOC_GET_FEATURES:
2877 return f2fs_ioc_get_features(filp, arg);
2878 case F2FS_IOC_FSGETXATTR:
2879 return f2fs_ioc_fsgetxattr(filp, arg);
2880 case F2FS_IOC_FSSETXATTR:
2881 return f2fs_ioc_fssetxattr(filp, arg);
2882 case F2FS_IOC_GET_PIN_FILE:
2883 return f2fs_ioc_get_pin_file(filp, arg);
2884 case F2FS_IOC_SET_PIN_FILE:
2885 return f2fs_ioc_set_pin_file(filp, arg);
2886 case F2FS_IOC_PRECACHE_EXTENTS:
2887 return f2fs_ioc_precache_extents(filp, arg);
2888 default:
2889 return -ENOTTY;
2890 }
2891}
2892
2893static ssize_t f2fs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
2894{
2895 struct file *file = iocb->ki_filp;
2896 struct inode *inode = file_inode(file);
2897 struct blk_plug plug;
2898 ssize_t ret;
2899
2900 if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
2901 return -EIO;
2902
2903 if ((iocb->ki_flags & IOCB_NOWAIT) && !(iocb->ki_flags & IOCB_DIRECT))
2904 return -EINVAL;
2905
2906 if (!inode_trylock(inode)) {
2907 if (iocb->ki_flags & IOCB_NOWAIT)
2908 return -EAGAIN;
2909 inode_lock(inode);
2910 }
2911
2912 ret = generic_write_checks(iocb, from);
2913 if (ret > 0) {
2914 bool preallocated = false;
2915 size_t target_size = 0;
2916 int err;
2917
2918 if (iov_iter_fault_in_readable(from, iov_iter_count(from)))
2919 set_inode_flag(inode, FI_NO_PREALLOC);
2920
2921 if ((iocb->ki_flags & IOCB_NOWAIT) &&
2922 (iocb->ki_flags & IOCB_DIRECT)) {
2923 if (!f2fs_overwrite_io(inode, iocb->ki_pos,
2924 iov_iter_count(from)) ||
2925 f2fs_has_inline_data(inode) ||
2926 f2fs_force_buffered_io(inode, WRITE)) {
2927 inode_unlock(inode);
2928 return -EAGAIN;
2929 }
2930
2931 } else {
2932 preallocated = true;
2933 target_size = iocb->ki_pos + iov_iter_count(from);
2934
2935 err = f2fs_preallocate_blocks(iocb, from);
2936 if (err) {
2937 clear_inode_flag(inode, FI_NO_PREALLOC);
2938 inode_unlock(inode);
2939 return err;
2940 }
2941 }
2942 blk_start_plug(&plug);
2943 ret = __generic_file_write_iter(iocb, from);
2944 blk_finish_plug(&plug);
2945 clear_inode_flag(inode, FI_NO_PREALLOC);
2946
2947 /* if we couldn't write data, we should deallocate blocks. */
2948 if (preallocated && i_size_read(inode) < target_size)
2949 f2fs_truncate(inode);
2950
2951 if (ret > 0)
2952 f2fs_update_iostat(F2FS_I_SB(inode), APP_WRITE_IO, ret);
2953 }
2954 inode_unlock(inode);
2955
2956 if (ret > 0)
2957 ret = generic_write_sync(iocb, ret);
2958 return ret;
2959}
2960
2961#ifdef CONFIG_COMPAT
2962long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2963{
2964 switch (cmd) {
2965 case F2FS_IOC32_GETFLAGS:
2966 cmd = F2FS_IOC_GETFLAGS;
2967 break;
2968 case F2FS_IOC32_SETFLAGS:
2969 cmd = F2FS_IOC_SETFLAGS;
2970 break;
2971 case F2FS_IOC32_GETVERSION:
2972 cmd = F2FS_IOC_GETVERSION;
2973 break;
2974 case F2FS_IOC_START_ATOMIC_WRITE:
2975 case F2FS_IOC_COMMIT_ATOMIC_WRITE:
2976 case F2FS_IOC_START_VOLATILE_WRITE:
2977 case F2FS_IOC_RELEASE_VOLATILE_WRITE:
2978 case F2FS_IOC_ABORT_VOLATILE_WRITE:
2979 case F2FS_IOC_SHUTDOWN:
2980 case F2FS_IOC_SET_ENCRYPTION_POLICY:
2981 case F2FS_IOC_GET_ENCRYPTION_PWSALT:
2982 case F2FS_IOC_GET_ENCRYPTION_POLICY:
2983 case F2FS_IOC_GARBAGE_COLLECT:
2984 case F2FS_IOC_GARBAGE_COLLECT_RANGE:
2985 case F2FS_IOC_WRITE_CHECKPOINT:
2986 case F2FS_IOC_DEFRAGMENT:
2987 case F2FS_IOC_MOVE_RANGE:
2988 case F2FS_IOC_FLUSH_DEVICE:
2989 case F2FS_IOC_GET_FEATURES:
2990 case F2FS_IOC_FSGETXATTR:
2991 case F2FS_IOC_FSSETXATTR:
2992 case F2FS_IOC_GET_PIN_FILE:
2993 case F2FS_IOC_SET_PIN_FILE:
2994 case F2FS_IOC_PRECACHE_EXTENTS:
2995 break;
2996 default:
2997 return -ENOIOCTLCMD;
2998 }
2999 return f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
3000}
3001#endif
3002
3003const struct file_operations f2fs_file_operations = {
3004 .llseek = f2fs_llseek,
3005 .read_iter = generic_file_read_iter,
3006 .write_iter = f2fs_file_write_iter,
3007 .open = f2fs_file_open,
3008 .release = f2fs_release_file,
3009 .mmap = f2fs_file_mmap,
3010 .flush = f2fs_file_flush,
3011 .fsync = f2fs_sync_file,
3012 .fallocate = f2fs_fallocate,
3013 .unlocked_ioctl = f2fs_ioctl,
3014#ifdef CONFIG_COMPAT
3015 .compat_ioctl = f2fs_compat_ioctl,
3016#endif
3017 .splice_read = generic_file_splice_read,
3018 .splice_write = iter_file_splice_write,
3019};