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staging: rtl8723bs: os_dep: change return type of rtw_suspend_ap_wow
[linux/fpc-iii.git] / fs / f2fs / file.c
blobf8d46df8fa9ee5cd91813b2de5e735e39a2ad4c5
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
24 #include "f2fs.h"
25 #include "node.h"
26 #include "segment.h"
27 #include "xattr.h"
28 #include "acl.h"
29 #include "gc.h"
30 #include "trace.h"
31 #include <trace/events/f2fs.h>
32
33 static vm_fault_t f2fs_filemap_fault(struct vm_fault *vmf)
34 {
35 struct inode *inode = file_inode(vmf->vma->vm_file);
36 vm_fault_t ret;
37
38 down_read(&F2FS_I(inode)->i_mmap_sem);
39 ret = filemap_fault(vmf);
40 up_read(&F2FS_I(inode)->i_mmap_sem);
41
42 trace_f2fs_filemap_fault(inode, vmf->pgoff, (unsigned long)ret);
43
44 return ret;
45 }
46
47 static vm_fault_t f2fs_vm_page_mkwrite(struct vm_fault *vmf)
48 {
49 struct page *page = vmf->page;
50 struct inode *inode = file_inode(vmf->vma->vm_file);
51 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
52 struct dnode_of_data dn = { .node_changed = false };
53 int err;
54
55 if (unlikely(f2fs_cp_error(sbi))) {
56 err = -EIO;
57 goto err;
58 }
59
60 sb_start_pagefault(inode->i_sb);
61
62 f2fs_bug_on(sbi, f2fs_has_inline_data(inode));
63
64 file_update_time(vmf->vma->vm_file);
65 down_read(&F2FS_I(inode)->i_mmap_sem);
66 lock_page(page);
67 if (unlikely(page->mapping != inode->i_mapping ||
68 page_offset(page) > i_size_read(inode) ||
69 !PageUptodate(page))) {
70 unlock_page(page);
71 err = -EFAULT;
72 goto out_sem;
73 }
74
75 /* block allocation */
76 __do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO, true);
77 set_new_dnode(&dn, inode, NULL, NULL, 0);
78 err = f2fs_get_block(&dn, page->index);
79 f2fs_put_dnode(&dn);
80 __do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO, false);
81 if (err) {
82 unlock_page(page);
83 goto out_sem;
84 }
85
86 /* fill the page */
87 f2fs_wait_on_page_writeback(page, DATA, false, true);
88
89 /* wait for GCed page writeback via META_MAPPING */
90 f2fs_wait_on_block_writeback(inode, dn.data_blkaddr);
91
92 /*
93 * check to see if the page is mapped already (no holes)
94 */
95 if (PageMappedToDisk(page))
96 goto out_sem;
97
98 /* page is wholly or partially inside EOF */
99 if (((loff_t)(page->index + 1) << PAGE_SHIFT) >
100 i_size_read(inode)) {
101 loff_t offset;
102
103 offset = i_size_read(inode) & ~PAGE_MASK;
104 zero_user_segment(page, offset, PAGE_SIZE);
105 }
106 set_page_dirty(page);
107 if (!PageUptodate(page))
108 SetPageUptodate(page);
109
110 f2fs_update_iostat(sbi, APP_MAPPED_IO, F2FS_BLKSIZE);
111 f2fs_update_time(sbi, REQ_TIME);
112
113 trace_f2fs_vm_page_mkwrite(page, DATA);
114 out_sem:
115 up_read(&F2FS_I(inode)->i_mmap_sem);
116
117 f2fs_balance_fs(sbi, dn.node_changed);
118
119 sb_end_pagefault(inode->i_sb);
120 err:
121 return block_page_mkwrite_return(err);
122 }
123
124 static const struct vm_operations_struct f2fs_file_vm_ops = {
125 .fault = f2fs_filemap_fault,
126 .map_pages = filemap_map_pages,
127 .page_mkwrite = f2fs_vm_page_mkwrite,
128 };
129
130 static int get_parent_ino(struct inode *inode, nid_t *pino)
131 {
132 struct dentry *dentry;
133
134 inode = igrab(inode);
135 dentry = d_find_any_alias(inode);
136 iput(inode);
137 if (!dentry)
138 return 0;
139
140 *pino = parent_ino(dentry);
141 dput(dentry);
142 return 1;
143 }
144
145 static inline enum cp_reason_type need_do_checkpoint(struct inode *inode)
146 {
147 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
148 enum cp_reason_type cp_reason = CP_NO_NEEDED;
149
150 if (!S_ISREG(inode->i_mode))
151 cp_reason = CP_NON_REGULAR;
152 else if (inode->i_nlink != 1)
153 cp_reason = CP_HARDLINK;
154 else if (is_sbi_flag_set(sbi, SBI_NEED_CP))
155 cp_reason = CP_SB_NEED_CP;
156 else if (file_wrong_pino(inode))
157 cp_reason = CP_WRONG_PINO;
158 else if (!f2fs_space_for_roll_forward(sbi))
159 cp_reason = CP_NO_SPC_ROLL;
160 else if (!f2fs_is_checkpointed_node(sbi, F2FS_I(inode)->i_pino))
161 cp_reason = CP_NODE_NEED_CP;
162 else if (test_opt(sbi, FASTBOOT))
163 cp_reason = CP_FASTBOOT_MODE;
164 else if (F2FS_OPTION(sbi).active_logs == 2)
165 cp_reason = CP_SPEC_LOG_NUM;
166 else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT &&
167 f2fs_need_dentry_mark(sbi, inode->i_ino) &&
168 f2fs_exist_written_data(sbi, F2FS_I(inode)->i_pino,
169 TRANS_DIR_INO))
170 cp_reason = CP_RECOVER_DIR;
171
172 return cp_reason;
173 }
174
175 static bool need_inode_page_update(struct f2fs_sb_info *sbi, nid_t ino)
176 {
177 struct page *i = find_get_page(NODE_MAPPING(sbi), ino);
178 bool ret = false;
179 /* But we need to avoid that there are some inode updates */
180 if ((i && PageDirty(i)) || f2fs_need_inode_block_update(sbi, ino))
181 ret = true;
182 f2fs_put_page(i, 0);
183 return ret;
184 }
185
186 static void try_to_fix_pino(struct inode *inode)
187 {
188 struct f2fs_inode_info *fi = F2FS_I(inode);
189 nid_t pino;
190
191 down_write(&fi->i_sem);
192 if (file_wrong_pino(inode) && inode->i_nlink == 1 &&
193 get_parent_ino(inode, &pino)) {
194 f2fs_i_pino_write(inode, pino);
195 file_got_pino(inode);
196 }
197 up_write(&fi->i_sem);
198 }
199
200 static int f2fs_do_sync_file(struct file *file, loff_t start, loff_t end,
201 int datasync, bool atomic)
202 {
203 struct inode *inode = file->f_mapping->host;
204 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
205 nid_t ino = inode->i_ino;
206 int ret = 0;
207 enum cp_reason_type cp_reason = 0;
208 struct writeback_control wbc = {
209 .sync_mode = WB_SYNC_ALL,
210 .nr_to_write = LONG_MAX,
211 .for_reclaim = 0,
212 };
213 unsigned int seq_id = 0;
214
215 if (unlikely(f2fs_readonly(inode->i_sb) ||
216 is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
217 return 0;
218
219 trace_f2fs_sync_file_enter(inode);
220
221 if (S_ISDIR(inode->i_mode))
222 goto go_write;
223
224 /* if fdatasync is triggered, let's do in-place-update */
225 if (datasync || get_dirty_pages(inode) <= SM_I(sbi)->min_fsync_blocks)
226 set_inode_flag(inode, FI_NEED_IPU);
227 ret = file_write_and_wait_range(file, start, end);
228 clear_inode_flag(inode, FI_NEED_IPU);
229
230 if (ret) {
231 trace_f2fs_sync_file_exit(inode, cp_reason, datasync, ret);
232 return ret;
233 }
234
235 /* if the inode is dirty, let's recover all the time */
236 if (!f2fs_skip_inode_update(inode, datasync)) {
237 f2fs_write_inode(inode, NULL);
238 goto go_write;
239 }
240
241 /*
242 * if there is no written data, don't waste time to write recovery info.
243 */
244 if (!is_inode_flag_set(inode, FI_APPEND_WRITE) &&
245 !f2fs_exist_written_data(sbi, ino, APPEND_INO)) {
246
247 /* it may call write_inode just prior to fsync */
248 if (need_inode_page_update(sbi, ino))
249 goto go_write;
250
251 if (is_inode_flag_set(inode, FI_UPDATE_WRITE) ||
252 f2fs_exist_written_data(sbi, ino, UPDATE_INO))
253 goto flush_out;
254 goto out;
255 }
256 go_write:
257 /*
258 * Both of fdatasync() and fsync() are able to be recovered from
259 * sudden-power-off.
260 */
261 down_read(&F2FS_I(inode)->i_sem);
262 cp_reason = need_do_checkpoint(inode);
263 up_read(&F2FS_I(inode)->i_sem);
264
265 if (cp_reason) {
266 /* all the dirty node pages should be flushed for POR */
267 ret = f2fs_sync_fs(inode->i_sb, 1);
268
269 /*
270 * We've secured consistency through sync_fs. Following pino
271 * will be used only for fsynced inodes after checkpoint.
272 */
273 try_to_fix_pino(inode);
274 clear_inode_flag(inode, FI_APPEND_WRITE);
275 clear_inode_flag(inode, FI_UPDATE_WRITE);
276 goto out;
277 }
278 sync_nodes:
279 atomic_inc(&sbi->wb_sync_req[NODE]);
280 ret = f2fs_fsync_node_pages(sbi, inode, &wbc, atomic, &seq_id);
281 atomic_dec(&sbi->wb_sync_req[NODE]);
282 if (ret)
283 goto out;
284
285 /* if cp_error was enabled, we should avoid infinite loop */
286 if (unlikely(f2fs_cp_error(sbi))) {
287 ret = -EIO;
288 goto out;
289 }
290
291 if (f2fs_need_inode_block_update(sbi, ino)) {
292 f2fs_mark_inode_dirty_sync(inode, true);
293 f2fs_write_inode(inode, NULL);
294 goto sync_nodes;
295 }
296
297 /*
298 * If it's atomic_write, it's just fine to keep write ordering. So
299 * here we don't need to wait for node write completion, since we use
300 * node chain which serializes node blocks. If one of node writes are
301 * reordered, we can see simply broken chain, resulting in stopping
302 * roll-forward recovery. It means we'll recover all or none node blocks
303 * given fsync mark.
304 */
305 if (!atomic) {
306 ret = f2fs_wait_on_node_pages_writeback(sbi, seq_id);
307 if (ret)
308 goto out;
309 }
310
311 /* once recovery info is written, don't need to tack this */
312 f2fs_remove_ino_entry(sbi, ino, APPEND_INO);
313 clear_inode_flag(inode, FI_APPEND_WRITE);
314 flush_out:
315 if (!atomic && F2FS_OPTION(sbi).fsync_mode != FSYNC_MODE_NOBARRIER)
316 ret = f2fs_issue_flush(sbi, inode->i_ino);
317 if (!ret) {
318 f2fs_remove_ino_entry(sbi, ino, UPDATE_INO);
319 clear_inode_flag(inode, FI_UPDATE_WRITE);
320 f2fs_remove_ino_entry(sbi, ino, FLUSH_INO);
321 }
322 f2fs_update_time(sbi, REQ_TIME);
323 out:
324 trace_f2fs_sync_file_exit(inode, cp_reason, datasync, ret);
325 f2fs_trace_ios(NULL, 1);
326 return ret;
327 }
328
329 int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
330 {
331 if (unlikely(f2fs_cp_error(F2FS_I_SB(file_inode(file)))))
332 return -EIO;
333 return f2fs_do_sync_file(file, start, end, datasync, false);
334 }
335
336 static pgoff_t __get_first_dirty_index(struct address_space *mapping,
337 pgoff_t pgofs, int whence)
338 {
339 struct page *page;
340 int nr_pages;
341
342 if (whence != SEEK_DATA)
343 return 0;
344
345 /* find first dirty page index */
346 nr_pages = find_get_pages_tag(mapping, &pgofs, PAGECACHE_TAG_DIRTY,
347 1, &page);
348 if (!nr_pages)
349 return ULONG_MAX;
350 pgofs = page->index;
351 put_page(page);
352 return pgofs;
353 }
354
355 static bool __found_offset(struct f2fs_sb_info *sbi, block_t blkaddr,
356 pgoff_t dirty, pgoff_t pgofs, int whence)
357 {
358 switch (whence) {
359 case SEEK_DATA:
360 if ((blkaddr == NEW_ADDR && dirty == pgofs) ||
361 __is_valid_data_blkaddr(blkaddr))
362 return true;
363 break;
364 case SEEK_HOLE:
365 if (blkaddr == NULL_ADDR)
366 return true;
367 break;
368 }
369 return false;
370 }
371
372 static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence)
373 {
374 struct inode *inode = file->f_mapping->host;
375 loff_t maxbytes = inode->i_sb->s_maxbytes;
376 struct dnode_of_data dn;
377 pgoff_t pgofs, end_offset, dirty;
378 loff_t data_ofs = offset;
379 loff_t isize;
380 int err = 0;
381
382 inode_lock(inode);
383
384 isize = i_size_read(inode);
385 if (offset >= isize)
386 goto fail;
387
388 /* handle inline data case */
389 if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode)) {
390 if (whence == SEEK_HOLE)
391 data_ofs = isize;
392 goto found;
393 }
394
395 pgofs = (pgoff_t)(offset >> PAGE_SHIFT);
396
397 dirty = __get_first_dirty_index(inode->i_mapping, pgofs, whence);
398
399 for (; data_ofs < isize; data_ofs = (loff_t)pgofs << PAGE_SHIFT) {
400 set_new_dnode(&dn, inode, NULL, NULL, 0);
401 err = f2fs_get_dnode_of_data(&dn, pgofs, LOOKUP_NODE);
402 if (err && err != -ENOENT) {
403 goto fail;
404 } else if (err == -ENOENT) {
405 /* direct node does not exists */
406 if (whence == SEEK_DATA) {
407 pgofs = f2fs_get_next_page_offset(&dn, pgofs);
408 continue;
409 } else {
410 goto found;
411 }
412 }
413
414 end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
415
416 /* find data/hole in dnode block */
417 for (; dn.ofs_in_node < end_offset;
418 dn.ofs_in_node++, pgofs++,
419 data_ofs = (loff_t)pgofs << PAGE_SHIFT) {
420 block_t blkaddr;
421
422 blkaddr = datablock_addr(dn.inode,
423 dn.node_page, dn.ofs_in_node);
424
425 if (__is_valid_data_blkaddr(blkaddr) &&
426 !f2fs_is_valid_blkaddr(F2FS_I_SB(inode),
427 blkaddr, DATA_GENERIC_ENHANCE)) {
428 f2fs_put_dnode(&dn);
429 goto fail;
430 }
431
432 if (__found_offset(F2FS_I_SB(inode), blkaddr, dirty,
433 pgofs, whence)) {
434 f2fs_put_dnode(&dn);
435 goto found;
436 }
437 }
438 f2fs_put_dnode(&dn);
439 }
440
441 if (whence == SEEK_DATA)
442 goto fail;
443 found:
444 if (whence == SEEK_HOLE && data_ofs > isize)
445 data_ofs = isize;
446 inode_unlock(inode);
447 return vfs_setpos(file, data_ofs, maxbytes);
448 fail:
449 inode_unlock(inode);
450 return -ENXIO;
451 }
452
453 static loff_t f2fs_llseek(struct file *file, loff_t offset, int whence)
454 {
455 struct inode *inode = file->f_mapping->host;
456 loff_t maxbytes = inode->i_sb->s_maxbytes;
457
458 switch (whence) {
459 case SEEK_SET:
460 case SEEK_CUR:
461 case SEEK_END:
462 return generic_file_llseek_size(file, offset, whence,
463 maxbytes, i_size_read(inode));
464 case SEEK_DATA:
465 case SEEK_HOLE:
466 if (offset < 0)
467 return -ENXIO;
468 return f2fs_seek_block(file, offset, whence);
469 }
470
471 return -EINVAL;
472 }
473
474 static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma)
475 {
476 struct inode *inode = file_inode(file);
477 int err;
478
479 if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
480 return -EIO;
481
482 /* we don't need to use inline_data strictly */
483 err = f2fs_convert_inline_inode(inode);
484 if (err)
485 return err;
486
487 file_accessed(file);
488 vma->vm_ops = &f2fs_file_vm_ops;
489 return 0;
490 }
491
492 static int f2fs_file_open(struct inode *inode, struct file *filp)
493 {
494 int err = fscrypt_file_open(inode, filp);
495
496 if (err)
497 return err;
498
499 filp->f_mode |= FMODE_NOWAIT;
500
501 return dquot_file_open(inode, filp);
502 }
503
504 void f2fs_truncate_data_blocks_range(struct dnode_of_data *dn, int count)
505 {
506 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
507 struct f2fs_node *raw_node;
508 int nr_free = 0, ofs = dn->ofs_in_node, len = count;
509 __le32 *addr;
510 int base = 0;
511
512 if (IS_INODE(dn->node_page) && f2fs_has_extra_attr(dn->inode))
513 base = get_extra_isize(dn->inode);
514
515 raw_node = F2FS_NODE(dn->node_page);
516 addr = blkaddr_in_node(raw_node) + base + ofs;
517
518 for (; count > 0; count--, addr++, dn->ofs_in_node++) {
519 block_t blkaddr = le32_to_cpu(*addr);
520
521 if (blkaddr == NULL_ADDR)
522 continue;
523
524 dn->data_blkaddr = NULL_ADDR;
525 f2fs_set_data_blkaddr(dn);
526
527 if (__is_valid_data_blkaddr(blkaddr) &&
528 !f2fs_is_valid_blkaddr(sbi, blkaddr,
529 DATA_GENERIC_ENHANCE))
530 continue;
531
532 f2fs_invalidate_blocks(sbi, blkaddr);
533 if (dn->ofs_in_node == 0 && IS_INODE(dn->node_page))
534 clear_inode_flag(dn->inode, FI_FIRST_BLOCK_WRITTEN);
535 nr_free++;
536 }
537
538 if (nr_free) {
539 pgoff_t fofs;
540 /*
541 * once we invalidate valid blkaddr in range [ofs, ofs + count],
542 * we will invalidate all blkaddr in the whole range.
543 */
544 fofs = f2fs_start_bidx_of_node(ofs_of_node(dn->node_page),
545 dn->inode) + ofs;
546 f2fs_update_extent_cache_range(dn, fofs, 0, len);
547 dec_valid_block_count(sbi, dn->inode, nr_free);
548 }
549 dn->ofs_in_node = ofs;
550
551 f2fs_update_time(sbi, REQ_TIME);
552 trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid,
553 dn->ofs_in_node, nr_free);
554 }
555
556 void f2fs_truncate_data_blocks(struct dnode_of_data *dn)
557 {
558 f2fs_truncate_data_blocks_range(dn, ADDRS_PER_BLOCK(dn->inode));
559 }
560
561 static int truncate_partial_data_page(struct inode *inode, u64 from,
562 bool cache_only)
563 {
564 loff_t offset = from & (PAGE_SIZE - 1);
565 pgoff_t index = from >> PAGE_SHIFT;
566 struct address_space *mapping = inode->i_mapping;
567 struct page *page;
568
569 if (!offset && !cache_only)
570 return 0;
571
572 if (cache_only) {
573 page = find_lock_page(mapping, index);
574 if (page && PageUptodate(page))
575 goto truncate_out;
576 f2fs_put_page(page, 1);
577 return 0;
578 }
579
580 page = f2fs_get_lock_data_page(inode, index, true);
581 if (IS_ERR(page))
582 return PTR_ERR(page) == -ENOENT ? 0 : PTR_ERR(page);
583 truncate_out:
584 f2fs_wait_on_page_writeback(page, DATA, true, true);
585 zero_user(page, offset, PAGE_SIZE - offset);
586
587 /* An encrypted inode should have a key and truncate the last page. */
588 f2fs_bug_on(F2FS_I_SB(inode), cache_only && IS_ENCRYPTED(inode));
589 if (!cache_only)
590 set_page_dirty(page);
591 f2fs_put_page(page, 1);
592 return 0;
593 }
594
595 int f2fs_truncate_blocks(struct inode *inode, u64 from, bool lock)
596 {
597 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
598 struct dnode_of_data dn;
599 pgoff_t free_from;
600 int count = 0, err = 0;
601 struct page *ipage;
602 bool truncate_page = false;
603
604 trace_f2fs_truncate_blocks_enter(inode, from);
605
606 free_from = (pgoff_t)F2FS_BLK_ALIGN(from);
607
608 if (free_from >= sbi->max_file_blocks)
609 goto free_partial;
610
611 if (lock)
612 f2fs_lock_op(sbi);
613
614 ipage = f2fs_get_node_page(sbi, inode->i_ino);
615 if (IS_ERR(ipage)) {
616 err = PTR_ERR(ipage);
617 goto out;
618 }
619
620 if (f2fs_has_inline_data(inode)) {
621 f2fs_truncate_inline_inode(inode, ipage, from);
622 f2fs_put_page(ipage, 1);
623 truncate_page = true;
624 goto out;
625 }
626
627 set_new_dnode(&dn, inode, ipage, NULL, 0);
628 err = f2fs_get_dnode_of_data(&dn, free_from, LOOKUP_NODE_RA);
629 if (err) {
630 if (err == -ENOENT)
631 goto free_next;
632 goto out;
633 }
634
635 count = ADDRS_PER_PAGE(dn.node_page, inode);
636
637 count -= dn.ofs_in_node;
638 f2fs_bug_on(sbi, count < 0);
639
640 if (dn.ofs_in_node || IS_INODE(dn.node_page)) {
641 f2fs_truncate_data_blocks_range(&dn, count);
642 free_from += count;
643 }
644
645 f2fs_put_dnode(&dn);
646 free_next:
647 err = f2fs_truncate_inode_blocks(inode, free_from);
648 out:
649 if (lock)
650 f2fs_unlock_op(sbi);
651 free_partial:
652 /* lastly zero out the first data page */
653 if (!err)
654 err = truncate_partial_data_page(inode, from, truncate_page);
655
656 trace_f2fs_truncate_blocks_exit(inode, err);
657 return err;
658 }
659
660 int f2fs_truncate(struct inode *inode)
661 {
662 int err;
663
664 if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
665 return -EIO;
666
667 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
668 S_ISLNK(inode->i_mode)))
669 return 0;
670
671 trace_f2fs_truncate(inode);
672
673 if (time_to_inject(F2FS_I_SB(inode), FAULT_TRUNCATE)) {
674 f2fs_show_injection_info(FAULT_TRUNCATE);
675 return -EIO;
676 }
677
678 /* we should check inline_data size */
679 if (!f2fs_may_inline_data(inode)) {
680 err = f2fs_convert_inline_inode(inode);
681 if (err)
682 return err;
683 }
684
685 err = f2fs_truncate_blocks(inode, i_size_read(inode), true);
686 if (err)
687 return err;
688
689 inode->i_mtime = inode->i_ctime = current_time(inode);
690 f2fs_mark_inode_dirty_sync(inode, false);
691 return 0;
692 }
693
694 int f2fs_getattr(const struct path *path, struct kstat *stat,
695 u32 request_mask, unsigned int query_flags)
696 {
697 struct inode *inode = d_inode(path->dentry);
698 struct f2fs_inode_info *fi = F2FS_I(inode);
699 struct f2fs_inode *ri;
700 unsigned int flags;
701
702 if (f2fs_has_extra_attr(inode) &&
703 f2fs_sb_has_inode_crtime(F2FS_I_SB(inode)) &&
704 F2FS_FITS_IN_INODE(ri, fi->i_extra_isize, i_crtime)) {
705 stat->result_mask |= STATX_BTIME;
706 stat->btime.tv_sec = fi->i_crtime.tv_sec;
707 stat->btime.tv_nsec = fi->i_crtime.tv_nsec;
708 }
709
710 flags = fi->i_flags;
711 if (flags & F2FS_APPEND_FL)
712 stat->attributes |= STATX_ATTR_APPEND;
713 if (IS_ENCRYPTED(inode))
714 stat->attributes |= STATX_ATTR_ENCRYPTED;
715 if (flags & F2FS_IMMUTABLE_FL)
716 stat->attributes |= STATX_ATTR_IMMUTABLE;
717 if (flags & F2FS_NODUMP_FL)
718 stat->attributes |= STATX_ATTR_NODUMP;
719
720 stat->attributes_mask |= (STATX_ATTR_APPEND |
721 STATX_ATTR_ENCRYPTED |
722 STATX_ATTR_IMMUTABLE |
723 STATX_ATTR_NODUMP);
724
725 generic_fillattr(inode, stat);
726
727 /* we need to show initial sectors used for inline_data/dentries */
728 if ((S_ISREG(inode->i_mode) && f2fs_has_inline_data(inode)) ||
729 f2fs_has_inline_dentry(inode))
730 stat->blocks += (stat->size + 511) >> 9;
731
732 return 0;
733 }
734
735 #ifdef CONFIG_F2FS_FS_POSIX_ACL
736 static void __setattr_copy(struct inode *inode, const struct iattr *attr)
737 {
738 unsigned int ia_valid = attr->ia_valid;
739
740 if (ia_valid & ATTR_UID)
741 inode->i_uid = attr->ia_uid;
742 if (ia_valid & ATTR_GID)
743 inode->i_gid = attr->ia_gid;
744 if (ia_valid & ATTR_ATIME)
745 inode->i_atime = timespec64_trunc(attr->ia_atime,
746 inode->i_sb->s_time_gran);
747 if (ia_valid & ATTR_MTIME)
748 inode->i_mtime = timespec64_trunc(attr->ia_mtime,
749 inode->i_sb->s_time_gran);
750 if (ia_valid & ATTR_CTIME)
751 inode->i_ctime = timespec64_trunc(attr->ia_ctime,
752 inode->i_sb->s_time_gran);
753 if (ia_valid & ATTR_MODE) {
754 umode_t mode = attr->ia_mode;
755
756 if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
757 mode &= ~S_ISGID;
758 set_acl_inode(inode, mode);
759 }
760 }
761 #else
762 #define __setattr_copy setattr_copy
763 #endif
764
765 int f2fs_setattr(struct dentry *dentry, struct iattr *attr)
766 {
767 struct inode *inode = d_inode(dentry);
768 int err;
769
770 if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
771 return -EIO;
772
773 err = setattr_prepare(dentry, attr);
774 if (err)
775 return err;
776
777 err = fscrypt_prepare_setattr(dentry, attr);
778 if (err)
779 return err;
780
781 if (is_quota_modification(inode, attr)) {
782 err = dquot_initialize(inode);
783 if (err)
784 return err;
785 }
786 if ((attr->ia_valid & ATTR_UID &&
787 !uid_eq(attr->ia_uid, inode->i_uid)) ||
788 (attr->ia_valid & ATTR_GID &&
789 !gid_eq(attr->ia_gid, inode->i_gid))) {
790 f2fs_lock_op(F2FS_I_SB(inode));
791 err = dquot_transfer(inode, attr);
792 if (err) {
793 set_sbi_flag(F2FS_I_SB(inode),
794 SBI_QUOTA_NEED_REPAIR);
795 f2fs_unlock_op(F2FS_I_SB(inode));
796 return err;
797 }
798 /*
799 * update uid/gid under lock_op(), so that dquot and inode can
800 * be updated atomically.
801 */
802 if (attr->ia_valid & ATTR_UID)
803 inode->i_uid = attr->ia_uid;
804 if (attr->ia_valid & ATTR_GID)
805 inode->i_gid = attr->ia_gid;
806 f2fs_mark_inode_dirty_sync(inode, true);
807 f2fs_unlock_op(F2FS_I_SB(inode));
808 }
809
810 if (attr->ia_valid & ATTR_SIZE) {
811 bool to_smaller = (attr->ia_size <= i_size_read(inode));
812
813 down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
814 down_write(&F2FS_I(inode)->i_mmap_sem);
815
816 truncate_setsize(inode, attr->ia_size);
817
818 if (to_smaller)
819 err = f2fs_truncate(inode);
820 /*
821 * do not trim all blocks after i_size if target size is
822 * larger than i_size.
823 */
824 up_write(&F2FS_I(inode)->i_mmap_sem);
825 up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
826
827 if (err)
828 return err;
829
830 if (!to_smaller) {
831 /* should convert inline inode here */
832 if (!f2fs_may_inline_data(inode)) {
833 err = f2fs_convert_inline_inode(inode);
834 if (err)
835 return err;
836 }
837 inode->i_mtime = inode->i_ctime = current_time(inode);
838 }
839
840 down_write(&F2FS_I(inode)->i_sem);
841 F2FS_I(inode)->last_disk_size = i_size_read(inode);
842 up_write(&F2FS_I(inode)->i_sem);
843 }
844
845 __setattr_copy(inode, attr);
846
847 if (attr->ia_valid & ATTR_MODE) {
848 err = posix_acl_chmod(inode, f2fs_get_inode_mode(inode));
849 if (err || is_inode_flag_set(inode, FI_ACL_MODE)) {
850 inode->i_mode = F2FS_I(inode)->i_acl_mode;
851 clear_inode_flag(inode, FI_ACL_MODE);
852 }
853 }
854
855 /* file size may changed here */
856 f2fs_mark_inode_dirty_sync(inode, true);
857
858 /* inode change will produce dirty node pages flushed by checkpoint */
859 f2fs_balance_fs(F2FS_I_SB(inode), true);
860
861 return err;
862 }
863
864 const struct inode_operations f2fs_file_inode_operations = {
865 .getattr = f2fs_getattr,
866 .setattr = f2fs_setattr,
867 .get_acl = f2fs_get_acl,
868 .set_acl = f2fs_set_acl,
869 #ifdef CONFIG_F2FS_FS_XATTR
870 .listxattr = f2fs_listxattr,
871 #endif
872 .fiemap = f2fs_fiemap,
873 };
874
875 static int fill_zero(struct inode *inode, pgoff_t index,
876 loff_t start, loff_t len)
877 {
878 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
879 struct page *page;
880
881 if (!len)
882 return 0;
883
884 f2fs_balance_fs(sbi, true);
885
886 f2fs_lock_op(sbi);
887 page = f2fs_get_new_data_page(inode, NULL, index, false);
888 f2fs_unlock_op(sbi);
889
890 if (IS_ERR(page))
891 return PTR_ERR(page);
892
893 f2fs_wait_on_page_writeback(page, DATA, true, true);
894 zero_user(page, start, len);
895 set_page_dirty(page);
896 f2fs_put_page(page, 1);
897 return 0;
898 }
899
900 int f2fs_truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end)
901 {
902 int err;
903
904 while (pg_start < pg_end) {
905 struct dnode_of_data dn;
906 pgoff_t end_offset, count;
907
908 set_new_dnode(&dn, inode, NULL, NULL, 0);
909 err = f2fs_get_dnode_of_data(&dn, pg_start, LOOKUP_NODE);
910 if (err) {
911 if (err == -ENOENT) {
912 pg_start = f2fs_get_next_page_offset(&dn,
913 pg_start);
914 continue;
915 }
916 return err;
917 }
918
919 end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
920 count = min(end_offset - dn.ofs_in_node, pg_end - pg_start);
921
922 f2fs_bug_on(F2FS_I_SB(inode), count == 0 || count > end_offset);
923
924 f2fs_truncate_data_blocks_range(&dn, count);
925 f2fs_put_dnode(&dn);
926
927 pg_start += count;
928 }
929 return 0;
930 }
931
932 static int punch_hole(struct inode *inode, loff_t offset, loff_t len)
933 {
934 pgoff_t pg_start, pg_end;
935 loff_t off_start, off_end;
936 int ret;
937
938 ret = f2fs_convert_inline_inode(inode);
939 if (ret)
940 return ret;
941
942 pg_start = ((unsigned long long) offset) >> PAGE_SHIFT;
943 pg_end = ((unsigned long long) offset + len) >> PAGE_SHIFT;
944
945 off_start = offset & (PAGE_SIZE - 1);
946 off_end = (offset + len) & (PAGE_SIZE - 1);
947
948 if (pg_start == pg_end) {
949 ret = fill_zero(inode, pg_start, off_start,
950 off_end - off_start);
951 if (ret)
952 return ret;
953 } else {
954 if (off_start) {
955 ret = fill_zero(inode, pg_start++, off_start,
956 PAGE_SIZE - off_start);
957 if (ret)
958 return ret;
959 }
960 if (off_end) {
961 ret = fill_zero(inode, pg_end, 0, off_end);
962 if (ret)
963 return ret;
964 }
965
966 if (pg_start < pg_end) {
967 struct address_space *mapping = inode->i_mapping;
968 loff_t blk_start, blk_end;
969 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
970
971 f2fs_balance_fs(sbi, true);
972
973 blk_start = (loff_t)pg_start << PAGE_SHIFT;
974 blk_end = (loff_t)pg_end << PAGE_SHIFT;
975
976 down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
977 down_write(&F2FS_I(inode)->i_mmap_sem);
978
979 truncate_inode_pages_range(mapping, blk_start,
980 blk_end - 1);
981
982 f2fs_lock_op(sbi);
983 ret = f2fs_truncate_hole(inode, pg_start, pg_end);
984 f2fs_unlock_op(sbi);
985
986 up_write(&F2FS_I(inode)->i_mmap_sem);
987 up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
988 }
989 }
990
991 return ret;
992 }
993
994 static int __read_out_blkaddrs(struct inode *inode, block_t *blkaddr,
995 int *do_replace, pgoff_t off, pgoff_t len)
996 {
997 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
998 struct dnode_of_data dn;
999 int ret, done, i;
1000
1001 next_dnode:
1002 set_new_dnode(&dn, inode, NULL, NULL, 0);
1003 ret = f2fs_get_dnode_of_data(&dn, off, LOOKUP_NODE_RA);
1004 if (ret && ret != -ENOENT) {
1005 return ret;
1006 } else if (ret == -ENOENT) {
1007 if (dn.max_level == 0)
1008 return -ENOENT;
1009 done = min((pgoff_t)ADDRS_PER_BLOCK(inode) - dn.ofs_in_node,
1010 len);
1011 blkaddr += done;
1012 do_replace += done;
1013 goto next;
1014 }
1015
1016 done = min((pgoff_t)ADDRS_PER_PAGE(dn.node_page, inode) -
1017 dn.ofs_in_node, len);
1018 for (i = 0; i < done; i++, blkaddr++, do_replace++, dn.ofs_in_node++) {
1019 *blkaddr = datablock_addr(dn.inode,
1020 dn.node_page, dn.ofs_in_node);
1021
1022 if (__is_valid_data_blkaddr(*blkaddr) &&
1023 !f2fs_is_valid_blkaddr(sbi, *blkaddr,
1024 DATA_GENERIC_ENHANCE)) {
1025 f2fs_put_dnode(&dn);
1026 return -EFSCORRUPTED;
1027 }
1028
1029 if (!f2fs_is_checkpointed_data(sbi, *blkaddr)) {
1030
1031 if (test_opt(sbi, LFS)) {
1032 f2fs_put_dnode(&dn);
1033 return -ENOTSUPP;
1034 }
1035
1036 /* do not invalidate this block address */
1037 f2fs_update_data_blkaddr(&dn, NULL_ADDR);
1038 *do_replace = 1;
1039 }
1040 }
1041 f2fs_put_dnode(&dn);
1042 next:
1043 len -= done;
1044 off += done;
1045 if (len)
1046 goto next_dnode;
1047 return 0;
1048 }
1049
1050 static int __roll_back_blkaddrs(struct inode *inode, block_t *blkaddr,
1051 int *do_replace, pgoff_t off, int len)
1052 {
1053 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1054 struct dnode_of_data dn;
1055 int ret, i;
1056
1057 for (i = 0; i < len; i++, do_replace++, blkaddr++) {
1058 if (*do_replace == 0)
1059 continue;
1060
1061 set_new_dnode(&dn, inode, NULL, NULL, 0);
1062 ret = f2fs_get_dnode_of_data(&dn, off + i, LOOKUP_NODE_RA);
1063 if (ret) {
1064 dec_valid_block_count(sbi, inode, 1);
1065 f2fs_invalidate_blocks(sbi, *blkaddr);
1066 } else {
1067 f2fs_update_data_blkaddr(&dn, *blkaddr);
1068 }
1069 f2fs_put_dnode(&dn);
1070 }
1071 return 0;
1072 }
1073
1074 static int __clone_blkaddrs(struct inode *src_inode, struct inode *dst_inode,
1075 block_t *blkaddr, int *do_replace,
1076 pgoff_t src, pgoff_t dst, pgoff_t len, bool full)
1077 {
1078 struct f2fs_sb_info *sbi = F2FS_I_SB(src_inode);
1079 pgoff_t i = 0;
1080 int ret;
1081
1082 while (i < len) {
1083 if (blkaddr[i] == NULL_ADDR && !full) {
1084 i++;
1085 continue;
1086 }
1087
1088 if (do_replace[i] || blkaddr[i] == NULL_ADDR) {
1089 struct dnode_of_data dn;
1090 struct node_info ni;
1091 size_t new_size;
1092 pgoff_t ilen;
1093
1094 set_new_dnode(&dn, dst_inode, NULL, NULL, 0);
1095 ret = f2fs_get_dnode_of_data(&dn, dst + i, ALLOC_NODE);
1096 if (ret)
1097 return ret;
1098
1099 ret = f2fs_get_node_info(sbi, dn.nid, &ni);
1100 if (ret) {
1101 f2fs_put_dnode(&dn);
1102 return ret;
1103 }
1104
1105 ilen = min((pgoff_t)
1106 ADDRS_PER_PAGE(dn.node_page, dst_inode) -
1107 dn.ofs_in_node, len - i);
1108 do {
1109 dn.data_blkaddr = datablock_addr(dn.inode,
1110 dn.node_page, dn.ofs_in_node);
1111 f2fs_truncate_data_blocks_range(&dn, 1);
1112
1113 if (do_replace[i]) {
1114 f2fs_i_blocks_write(src_inode,
1115 1, false, false);
1116 f2fs_i_blocks_write(dst_inode,
1117 1, true, false);
1118 f2fs_replace_block(sbi, &dn, dn.data_blkaddr,
1119 blkaddr[i], ni.version, true, false);
1120
1121 do_replace[i] = 0;
1122 }
1123 dn.ofs_in_node++;
1124 i++;
1125 new_size = (dst + i) << PAGE_SHIFT;
1126 if (dst_inode->i_size < new_size)
1127 f2fs_i_size_write(dst_inode, new_size);
1128 } while (--ilen && (do_replace[i] || blkaddr[i] == NULL_ADDR));
1129
1130 f2fs_put_dnode(&dn);
1131 } else {
1132 struct page *psrc, *pdst;
1133
1134 psrc = f2fs_get_lock_data_page(src_inode,
1135 src + i, true);
1136 if (IS_ERR(psrc))
1137 return PTR_ERR(psrc);
1138 pdst = f2fs_get_new_data_page(dst_inode, NULL, dst + i,
1139 true);
1140 if (IS_ERR(pdst)) {
1141 f2fs_put_page(psrc, 1);
1142 return PTR_ERR(pdst);
1143 }
1144 f2fs_copy_page(psrc, pdst);
1145 set_page_dirty(pdst);
1146 f2fs_put_page(pdst, 1);
1147 f2fs_put_page(psrc, 1);
1148
1149 ret = f2fs_truncate_hole(src_inode,
1150 src + i, src + i + 1);
1151 if (ret)
1152 return ret;
1153 i++;
1154 }
1155 }
1156 return 0;
1157 }
1158
1159 static int __exchange_data_block(struct inode *src_inode,
1160 struct inode *dst_inode, pgoff_t src, pgoff_t dst,
1161 pgoff_t len, bool full)
1162 {
1163 block_t *src_blkaddr;
1164 int *do_replace;
1165 pgoff_t olen;
1166 int ret;
1167
1168 while (len) {
1169 olen = min((pgoff_t)4 * ADDRS_PER_BLOCK(src_inode), len);
1170
1171 src_blkaddr = f2fs_kvzalloc(F2FS_I_SB(src_inode),
1172 array_size(olen, sizeof(block_t)),
1173 GFP_KERNEL);
1174 if (!src_blkaddr)
1175 return -ENOMEM;
1176
1177 do_replace = f2fs_kvzalloc(F2FS_I_SB(src_inode),
1178 array_size(olen, sizeof(int)),
1179 GFP_KERNEL);
1180 if (!do_replace) {
1181 kvfree(src_blkaddr);
1182 return -ENOMEM;
1183 }
1184
1185 ret = __read_out_blkaddrs(src_inode, src_blkaddr,
1186 do_replace, src, olen);
1187 if (ret)
1188 goto roll_back;
1189
1190 ret = __clone_blkaddrs(src_inode, dst_inode, src_blkaddr,
1191 do_replace, src, dst, olen, full);
1192 if (ret)
1193 goto roll_back;
1194
1195 src += olen;
1196 dst += olen;
1197 len -= olen;
1198
1199 kvfree(src_blkaddr);
1200 kvfree(do_replace);
1201 }
1202 return 0;
1203
1204 roll_back:
1205 __roll_back_blkaddrs(src_inode, src_blkaddr, do_replace, src, olen);
1206 kvfree(src_blkaddr);
1207 kvfree(do_replace);
1208 return ret;
1209 }
1210
1211 static int f2fs_do_collapse(struct inode *inode, loff_t offset, loff_t len)
1212 {
1213 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1214 pgoff_t nrpages = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE);
1215 pgoff_t start = offset >> PAGE_SHIFT;
1216 pgoff_t end = (offset + len) >> PAGE_SHIFT;
1217 int ret;
1218
1219 f2fs_balance_fs(sbi, true);
1220
1221 /* avoid gc operation during block exchange */
1222 down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
1223 down_write(&F2FS_I(inode)->i_mmap_sem);
1224
1225 f2fs_lock_op(sbi);
1226 f2fs_drop_extent_tree(inode);
1227 truncate_pagecache(inode, offset);
1228 ret = __exchange_data_block(inode, inode, end, start, nrpages - end, true);
1229 f2fs_unlock_op(sbi);
1230
1231 up_write(&F2FS_I(inode)->i_mmap_sem);
1232 up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
1233 return ret;
1234 }
1235
1236 static int f2fs_collapse_range(struct inode *inode, loff_t offset, loff_t len)
1237 {
1238 loff_t new_size;
1239 int ret;
1240
1241 if (offset + len >= i_size_read(inode))
1242 return -EINVAL;
1243
1244 /* collapse range should be aligned to block size of f2fs. */
1245 if (offset & (F2FS_BLKSIZE - 1) || len & (F2FS_BLKSIZE - 1))
1246 return -EINVAL;
1247
1248 ret = f2fs_convert_inline_inode(inode);
1249 if (ret)
1250 return ret;
1251
1252 /* write out all dirty pages from offset */
1253 ret = filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX);
1254 if (ret)
1255 return ret;
1256
1257 ret = f2fs_do_collapse(inode, offset, len);
1258 if (ret)
1259 return ret;
1260
1261 /* write out all moved pages, if possible */
1262 down_write(&F2FS_I(inode)->i_mmap_sem);
1263 filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX);
1264 truncate_pagecache(inode, offset);
1265
1266 new_size = i_size_read(inode) - len;
1267 truncate_pagecache(inode, new_size);
1268
1269 ret = f2fs_truncate_blocks(inode, new_size, true);
1270 up_write(&F2FS_I(inode)->i_mmap_sem);
1271 if (!ret)
1272 f2fs_i_size_write(inode, new_size);
1273 return ret;
1274 }
1275
1276 static int f2fs_do_zero_range(struct dnode_of_data *dn, pgoff_t start,
1277 pgoff_t end)
1278 {
1279 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
1280 pgoff_t index = start;
1281 unsigned int ofs_in_node = dn->ofs_in_node;
1282 blkcnt_t count = 0;
1283 int ret;
1284
1285 for (; index < end; index++, dn->ofs_in_node++) {
1286 if (datablock_addr(dn->inode, dn->node_page,
1287 dn->ofs_in_node) == NULL_ADDR)
1288 count++;
1289 }
1290
1291 dn->ofs_in_node = ofs_in_node;
1292 ret = f2fs_reserve_new_blocks(dn, count);
1293 if (ret)
1294 return ret;
1295
1296 dn->ofs_in_node = ofs_in_node;
1297 for (index = start; index < end; index++, dn->ofs_in_node++) {
1298 dn->data_blkaddr = datablock_addr(dn->inode,
1299 dn->node_page, dn->ofs_in_node);
1300 /*
1301 * f2fs_reserve_new_blocks will not guarantee entire block
1302 * allocation.
1303 */
1304 if (dn->data_blkaddr == NULL_ADDR) {
1305 ret = -ENOSPC;
1306 break;
1307 }
1308 if (dn->data_blkaddr != NEW_ADDR) {
1309 f2fs_invalidate_blocks(sbi, dn->data_blkaddr);
1310 dn->data_blkaddr = NEW_ADDR;
1311 f2fs_set_data_blkaddr(dn);
1312 }
1313 }
1314
1315 f2fs_update_extent_cache_range(dn, start, 0, index - start);
1316
1317 return ret;
1318 }
1319
1320 static int f2fs_zero_range(struct inode *inode, loff_t offset, loff_t len,
1321 int mode)
1322 {
1323 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1324 struct address_space *mapping = inode->i_mapping;
1325 pgoff_t index, pg_start, pg_end;
1326 loff_t new_size = i_size_read(inode);
1327 loff_t off_start, off_end;
1328 int ret = 0;
1329
1330 ret = inode_newsize_ok(inode, (len + offset));
1331 if (ret)
1332 return ret;
1333
1334 ret = f2fs_convert_inline_inode(inode);
1335 if (ret)
1336 return ret;
1337
1338 ret = filemap_write_and_wait_range(mapping, offset, offset + len - 1);
1339 if (ret)
1340 return ret;
1341
1342 pg_start = ((unsigned long long) offset) >> PAGE_SHIFT;
1343 pg_end = ((unsigned long long) offset + len) >> PAGE_SHIFT;
1344
1345 off_start = offset & (PAGE_SIZE - 1);
1346 off_end = (offset + len) & (PAGE_SIZE - 1);
1347
1348 if (pg_start == pg_end) {
1349 ret = fill_zero(inode, pg_start, off_start,
1350 off_end - off_start);
1351 if (ret)
1352 return ret;
1353
1354 new_size = max_t(loff_t, new_size, offset + len);
1355 } else {
1356 if (off_start) {
1357 ret = fill_zero(inode, pg_start++, off_start,
1358 PAGE_SIZE - off_start);
1359 if (ret)
1360 return ret;
1361
1362 new_size = max_t(loff_t, new_size,
1363 (loff_t)pg_start << PAGE_SHIFT);
1364 }
1365
1366 for (index = pg_start; index < pg_end;) {
1367 struct dnode_of_data dn;
1368 unsigned int end_offset;
1369 pgoff_t end;
1370
1371 down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
1372 down_write(&F2FS_I(inode)->i_mmap_sem);
1373
1374 truncate_pagecache_range(inode,
1375 (loff_t)index << PAGE_SHIFT,
1376 ((loff_t)pg_end << PAGE_SHIFT) - 1);
1377
1378 f2fs_lock_op(sbi);
1379
1380 set_new_dnode(&dn, inode, NULL, NULL, 0);
1381 ret = f2fs_get_dnode_of_data(&dn, index, ALLOC_NODE);
1382 if (ret) {
1383 f2fs_unlock_op(sbi);
1384 up_write(&F2FS_I(inode)->i_mmap_sem);
1385 up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
1386 goto out;
1387 }
1388
1389 end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
1390 end = min(pg_end, end_offset - dn.ofs_in_node + index);
1391
1392 ret = f2fs_do_zero_range(&dn, index, end);
1393 f2fs_put_dnode(&dn);
1394
1395 f2fs_unlock_op(sbi);
1396 up_write(&F2FS_I(inode)->i_mmap_sem);
1397 up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
1398
1399 f2fs_balance_fs(sbi, dn.node_changed);
1400
1401 if (ret)
1402 goto out;
1403
1404 index = end;
1405 new_size = max_t(loff_t, new_size,
1406 (loff_t)index << PAGE_SHIFT);
1407 }
1408
1409 if (off_end) {
1410 ret = fill_zero(inode, pg_end, 0, off_end);
1411 if (ret)
1412 goto out;
1413
1414 new_size = max_t(loff_t, new_size, offset + len);
1415 }
1416 }
1417
1418 out:
1419 if (new_size > i_size_read(inode)) {
1420 if (mode & FALLOC_FL_KEEP_SIZE)
1421 file_set_keep_isize(inode);
1422 else
1423 f2fs_i_size_write(inode, new_size);
1424 }
1425 return ret;
1426 }
1427
1428 static int f2fs_insert_range(struct inode *inode, loff_t offset, loff_t len)
1429 {
1430 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1431 pgoff_t nr, pg_start, pg_end, delta, idx;
1432 loff_t new_size;
1433 int ret = 0;
1434
1435 new_size = i_size_read(inode) + len;
1436 ret = inode_newsize_ok(inode, new_size);
1437 if (ret)
1438 return ret;
1439
1440 if (offset >= i_size_read(inode))
1441 return -EINVAL;
1442
1443 /* insert range should be aligned to block size of f2fs. */
1444 if (offset & (F2FS_BLKSIZE - 1) || len & (F2FS_BLKSIZE - 1))
1445 return -EINVAL;
1446
1447 ret = f2fs_convert_inline_inode(inode);
1448 if (ret)
1449 return ret;
1450
1451 f2fs_balance_fs(sbi, true);
1452
1453 down_write(&F2FS_I(inode)->i_mmap_sem);
1454 ret = f2fs_truncate_blocks(inode, i_size_read(inode), true);
1455 up_write(&F2FS_I(inode)->i_mmap_sem);
1456 if (ret)
1457 return ret;
1458
1459 /* write out all dirty pages from offset */
1460 ret = filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX);
1461 if (ret)
1462 return ret;
1463
1464 pg_start = offset >> PAGE_SHIFT;
1465 pg_end = (offset + len) >> PAGE_SHIFT;
1466 delta = pg_end - pg_start;
1467 idx = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE);
1468
1469 /* avoid gc operation during block exchange */
1470 down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
1471 down_write(&F2FS_I(inode)->i_mmap_sem);
1472 truncate_pagecache(inode, offset);
1473
1474 while (!ret && idx > pg_start) {
1475 nr = idx - pg_start;
1476 if (nr > delta)
1477 nr = delta;
1478 idx -= nr;
1479
1480 f2fs_lock_op(sbi);
1481 f2fs_drop_extent_tree(inode);
1482
1483 ret = __exchange_data_block(inode, inode, idx,
1484 idx + delta, nr, false);
1485 f2fs_unlock_op(sbi);
1486 }
1487 up_write(&F2FS_I(inode)->i_mmap_sem);
1488 up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
1489
1490 /* write out all moved pages, if possible */
1491 down_write(&F2FS_I(inode)->i_mmap_sem);
1492 filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX);
1493 truncate_pagecache(inode, offset);
1494 up_write(&F2FS_I(inode)->i_mmap_sem);
1495
1496 if (!ret)
1497 f2fs_i_size_write(inode, new_size);
1498 return ret;
1499 }
1500
1501 static int expand_inode_data(struct inode *inode, loff_t offset,
1502 loff_t len, int mode)
1503 {
1504 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1505 struct f2fs_map_blocks map = { .m_next_pgofs = NULL,
1506 .m_next_extent = NULL, .m_seg_type = NO_CHECK_TYPE,
1507 .m_may_create = true };
1508 pgoff_t pg_end;
1509 loff_t new_size = i_size_read(inode);
1510 loff_t off_end;
1511 int err;
1512
1513 err = inode_newsize_ok(inode, (len + offset));
1514 if (err)
1515 return err;
1516
1517 err = f2fs_convert_inline_inode(inode);
1518 if (err)
1519 return err;
1520
1521 f2fs_balance_fs(sbi, true);
1522
1523 pg_end = ((unsigned long long)offset + len) >> PAGE_SHIFT;
1524 off_end = (offset + len) & (PAGE_SIZE - 1);
1525
1526 map.m_lblk = ((unsigned long long)offset) >> PAGE_SHIFT;
1527 map.m_len = pg_end - map.m_lblk;
1528 if (off_end)
1529 map.m_len++;
1530
1531 if (f2fs_is_pinned_file(inode))
1532 map.m_seg_type = CURSEG_COLD_DATA;
1533
1534 err = f2fs_map_blocks(inode, &map, 1, (f2fs_is_pinned_file(inode) ?
1535 F2FS_GET_BLOCK_PRE_DIO :
1536 F2FS_GET_BLOCK_PRE_AIO));
1537 if (err) {
1538 pgoff_t last_off;
1539
1540 if (!map.m_len)
1541 return err;
1542
1543 last_off = map.m_lblk + map.m_len - 1;
1544
1545 /* update new size to the failed position */
1546 new_size = (last_off == pg_end) ? offset + len :
1547 (loff_t)(last_off + 1) << PAGE_SHIFT;
1548 } else {
1549 new_size = ((loff_t)pg_end << PAGE_SHIFT) + off_end;
1550 }
1551
1552 if (new_size > i_size_read(inode)) {
1553 if (mode & FALLOC_FL_KEEP_SIZE)
1554 file_set_keep_isize(inode);
1555 else
1556 f2fs_i_size_write(inode, new_size);
1557 }
1558
1559 return err;
1560 }
1561
1562 static long f2fs_fallocate(struct file *file, int mode,
1563 loff_t offset, loff_t len)
1564 {
1565 struct inode *inode = file_inode(file);
1566 long ret = 0;
1567
1568 if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
1569 return -EIO;
1570
1571 /* f2fs only support ->fallocate for regular file */
1572 if (!S_ISREG(inode->i_mode))
1573 return -EINVAL;
1574
1575 if (IS_ENCRYPTED(inode) &&
1576 (mode & (FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_INSERT_RANGE)))
1577 return -EOPNOTSUPP;
1578
1579 if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE |
1580 FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_ZERO_RANGE |
1581 FALLOC_FL_INSERT_RANGE))
1582 return -EOPNOTSUPP;
1583
1584 inode_lock(inode);
1585
1586 if (mode & FALLOC_FL_PUNCH_HOLE) {
1587 if (offset >= inode->i_size)
1588 goto out;
1589
1590 ret = punch_hole(inode, offset, len);
1591 } else if (mode & FALLOC_FL_COLLAPSE_RANGE) {
1592 ret = f2fs_collapse_range(inode, offset, len);
1593 } else if (mode & FALLOC_FL_ZERO_RANGE) {
1594 ret = f2fs_zero_range(inode, offset, len, mode);
1595 } else if (mode & FALLOC_FL_INSERT_RANGE) {
1596 ret = f2fs_insert_range(inode, offset, len);
1597 } else {
1598 ret = expand_inode_data(inode, offset, len, mode);
1599 }
1600
1601 if (!ret) {
1602 inode->i_mtime = inode->i_ctime = current_time(inode);
1603 f2fs_mark_inode_dirty_sync(inode, false);
1604 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
1605 }
1606
1607 out:
1608 inode_unlock(inode);
1609
1610 trace_f2fs_fallocate(inode, mode, offset, len, ret);
1611 return ret;
1612 }
1613
1614 static int f2fs_release_file(struct inode *inode, struct file *filp)
1615 {
1616 /*
1617 * f2fs_relase_file is called at every close calls. So we should
1618 * not drop any inmemory pages by close called by other process.
1619 */
1620 if (!(filp->f_mode & FMODE_WRITE) ||
1621 atomic_read(&inode->i_writecount) != 1)
1622 return 0;
1623
1624 /* some remained atomic pages should discarded */
1625 if (f2fs_is_atomic_file(inode))
1626 f2fs_drop_inmem_pages(inode);
1627 if (f2fs_is_volatile_file(inode)) {
1628 set_inode_flag(inode, FI_DROP_CACHE);
1629 filemap_fdatawrite(inode->i_mapping);
1630 clear_inode_flag(inode, FI_DROP_CACHE);
1631 clear_inode_flag(inode, FI_VOLATILE_FILE);
1632 stat_dec_volatile_write(inode);
1633 }
1634 return 0;
1635 }
1636
1637 static int f2fs_file_flush(struct file *file, fl_owner_t id)
1638 {
1639 struct inode *inode = file_inode(file);
1640
1641 /*
1642 * If the process doing a transaction is crashed, we should do
1643 * roll-back. Otherwise, other reader/write can see corrupted database
1644 * until all the writers close its file. Since this should be done
1645 * before dropping file lock, it needs to do in ->flush.
1646 */
1647 if (f2fs_is_atomic_file(inode) &&
1648 F2FS_I(inode)->inmem_task == current)
1649 f2fs_drop_inmem_pages(inode);
1650 return 0;
1651 }
1652
1653 static int f2fs_setflags_common(struct inode *inode, u32 iflags, u32 mask)
1654 {
1655 struct f2fs_inode_info *fi = F2FS_I(inode);
1656 u32 oldflags;
1657
1658 /* Is it quota file? Do not allow user to mess with it */
1659 if (IS_NOQUOTA(inode))
1660 return -EPERM;
1661
1662 oldflags = fi->i_flags;
1663
1664 if ((iflags ^ oldflags) & (F2FS_APPEND_FL | F2FS_IMMUTABLE_FL))
1665 if (!capable(CAP_LINUX_IMMUTABLE))
1666 return -EPERM;
1667
1668 fi->i_flags = iflags | (oldflags & ~mask);
1669
1670 if (fi->i_flags & F2FS_PROJINHERIT_FL)
1671 set_inode_flag(inode, FI_PROJ_INHERIT);
1672 else
1673 clear_inode_flag(inode, FI_PROJ_INHERIT);
1674
1675 inode->i_ctime = current_time(inode);
1676 f2fs_set_inode_flags(inode);
1677 f2fs_mark_inode_dirty_sync(inode, true);
1678 return 0;
1679 }
1680
1681 /* FS_IOC_GETFLAGS and FS_IOC_SETFLAGS support */
1682
1683 /*
1684 * To make a new on-disk f2fs i_flag gettable via FS_IOC_GETFLAGS, add an entry
1685 * for it to f2fs_fsflags_map[], and add its FS_*_FL equivalent to
1686 * F2FS_GETTABLE_FS_FL. To also make it settable via FS_IOC_SETFLAGS, also add
1687 * its FS_*_FL equivalent to F2FS_SETTABLE_FS_FL.
1688 */
1689
1690 static const struct {
1691 u32 iflag;
1692 u32 fsflag;
1693 } f2fs_fsflags_map[] = {
1694 { F2FS_SYNC_FL, FS_SYNC_FL },
1695 { F2FS_IMMUTABLE_FL, FS_IMMUTABLE_FL },
1696 { F2FS_APPEND_FL, FS_APPEND_FL },
1697 { F2FS_NODUMP_FL, FS_NODUMP_FL },
1698 { F2FS_NOATIME_FL, FS_NOATIME_FL },
1699 { F2FS_INDEX_FL, FS_INDEX_FL },
1700 { F2FS_DIRSYNC_FL, FS_DIRSYNC_FL },
1701 { F2FS_PROJINHERIT_FL, FS_PROJINHERIT_FL },
1702 };
1703
1704 #define F2FS_GETTABLE_FS_FL ( \
1705 FS_SYNC_FL | \
1706 FS_IMMUTABLE_FL | \
1707 FS_APPEND_FL | \
1708 FS_NODUMP_FL | \
1709 FS_NOATIME_FL | \
1710 FS_INDEX_FL | \
1711 FS_DIRSYNC_FL | \
1712 FS_PROJINHERIT_FL | \
1713 FS_ENCRYPT_FL | \
1714 FS_INLINE_DATA_FL | \
1715 FS_NOCOW_FL)
1716
1717 #define F2FS_SETTABLE_FS_FL ( \
1718 FS_SYNC_FL | \
1719 FS_IMMUTABLE_FL | \
1720 FS_APPEND_FL | \
1721 FS_NODUMP_FL | \
1722 FS_NOATIME_FL | \
1723 FS_DIRSYNC_FL | \
1724 FS_PROJINHERIT_FL)
1725
1726 /* Convert f2fs on-disk i_flags to FS_IOC_{GET,SET}FLAGS flags */
1727 static inline u32 f2fs_iflags_to_fsflags(u32 iflags)
1728 {
1729 u32 fsflags = 0;
1730 int i;
1731
1732 for (i = 0; i < ARRAY_SIZE(f2fs_fsflags_map); i++)
1733 if (iflags & f2fs_fsflags_map[i].iflag)
1734 fsflags |= f2fs_fsflags_map[i].fsflag;
1735
1736 return fsflags;
1737 }
1738
1739 /* Convert FS_IOC_{GET,SET}FLAGS flags to f2fs on-disk i_flags */
1740 static inline u32 f2fs_fsflags_to_iflags(u32 fsflags)
1741 {
1742 u32 iflags = 0;
1743 int i;
1744
1745 for (i = 0; i < ARRAY_SIZE(f2fs_fsflags_map); i++)
1746 if (fsflags & f2fs_fsflags_map[i].fsflag)
1747 iflags |= f2fs_fsflags_map[i].iflag;
1748
1749 return iflags;
1750 }
1751
1752 static int f2fs_ioc_getflags(struct file *filp, unsigned long arg)
1753 {
1754 struct inode *inode = file_inode(filp);
1755 struct f2fs_inode_info *fi = F2FS_I(inode);
1756 u32 fsflags = f2fs_iflags_to_fsflags(fi->i_flags);
1757
1758 if (IS_ENCRYPTED(inode))
1759 fsflags |= FS_ENCRYPT_FL;
1760 if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode))
1761 fsflags |= FS_INLINE_DATA_FL;
1762 if (is_inode_flag_set(inode, FI_PIN_FILE))
1763 fsflags |= FS_NOCOW_FL;
1764
1765 fsflags &= F2FS_GETTABLE_FS_FL;
1766
1767 return put_user(fsflags, (int __user *)arg);
1768 }
1769
1770 static int f2fs_ioc_setflags(struct file *filp, unsigned long arg)
1771 {
1772 struct inode *inode = file_inode(filp);
1773 u32 fsflags;
1774 u32 iflags;
1775 int ret;
1776
1777 if (!inode_owner_or_capable(inode))
1778 return -EACCES;
1779
1780 if (get_user(fsflags, (int __user *)arg))
1781 return -EFAULT;
1782
1783 if (fsflags & ~F2FS_GETTABLE_FS_FL)
1784 return -EOPNOTSUPP;
1785 fsflags &= F2FS_SETTABLE_FS_FL;
1786
1787 iflags = f2fs_fsflags_to_iflags(fsflags);
1788 if (f2fs_mask_flags(inode->i_mode, iflags) != iflags)
1789 return -EOPNOTSUPP;
1790
1791 ret = mnt_want_write_file(filp);
1792 if (ret)
1793 return ret;
1794
1795 inode_lock(inode);
1796
1797 ret = f2fs_setflags_common(inode, iflags,
1798 f2fs_fsflags_to_iflags(F2FS_SETTABLE_FS_FL));
1799 inode_unlock(inode);
1800 mnt_drop_write_file(filp);
1801 return ret;
1802 }
1803
1804 static int f2fs_ioc_getversion(struct file *filp, unsigned long arg)
1805 {
1806 struct inode *inode = file_inode(filp);
1807
1808 return put_user(inode->i_generation, (int __user *)arg);
1809 }
1810
1811 static int f2fs_ioc_start_atomic_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 if (!S_ISREG(inode->i_mode))
1820 return -EINVAL;
1821
1822 ret = mnt_want_write_file(filp);
1823 if (ret)
1824 return ret;
1825
1826 inode_lock(inode);
1827
1828 if (f2fs_is_atomic_file(inode)) {
1829 if (is_inode_flag_set(inode, FI_ATOMIC_REVOKE_REQUEST))
1830 ret = -EINVAL;
1831 goto out;
1832 }
1833
1834 ret = f2fs_convert_inline_inode(inode);
1835 if (ret)
1836 goto out;
1837
1838 down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
1839
1840 /*
1841 * Should wait end_io to count F2FS_WB_CP_DATA correctly by
1842 * f2fs_is_atomic_file.
1843 */
1844 if (get_dirty_pages(inode))
1845 f2fs_warn(F2FS_I_SB(inode), "Unexpected flush for atomic writes: ino=%lu, npages=%u",
1846 inode->i_ino, get_dirty_pages(inode));
1847 ret = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX);
1848 if (ret) {
1849 up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
1850 goto out;
1851 }
1852
1853 set_inode_flag(inode, FI_ATOMIC_FILE);
1854 clear_inode_flag(inode, FI_ATOMIC_REVOKE_REQUEST);
1855 up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
1856
1857 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
1858 F2FS_I(inode)->inmem_task = current;
1859 stat_inc_atomic_write(inode);
1860 stat_update_max_atomic_write(inode);
1861 out:
1862 inode_unlock(inode);
1863 mnt_drop_write_file(filp);
1864 return ret;
1865 }
1866
1867 static int f2fs_ioc_commit_atomic_write(struct file *filp)
1868 {
1869 struct inode *inode = file_inode(filp);
1870 int ret;
1871
1872 if (!inode_owner_or_capable(inode))
1873 return -EACCES;
1874
1875 ret = mnt_want_write_file(filp);
1876 if (ret)
1877 return ret;
1878
1879 f2fs_balance_fs(F2FS_I_SB(inode), true);
1880
1881 inode_lock(inode);
1882
1883 if (f2fs_is_volatile_file(inode)) {
1884 ret = -EINVAL;
1885 goto err_out;
1886 }
1887
1888 if (f2fs_is_atomic_file(inode)) {
1889 ret = f2fs_commit_inmem_pages(inode);
1890 if (ret)
1891 goto err_out;
1892
1893 ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 0, true);
1894 if (!ret) {
1895 clear_inode_flag(inode, FI_ATOMIC_FILE);
1896 F2FS_I(inode)->i_gc_failures[GC_FAILURE_ATOMIC] = 0;
1897 stat_dec_atomic_write(inode);
1898 }
1899 } else {
1900 ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 1, false);
1901 }
1902 err_out:
1903 if (is_inode_flag_set(inode, FI_ATOMIC_REVOKE_REQUEST)) {
1904 clear_inode_flag(inode, FI_ATOMIC_REVOKE_REQUEST);
1905 ret = -EINVAL;
1906 }
1907 inode_unlock(inode);
1908 mnt_drop_write_file(filp);
1909 return ret;
1910 }
1911
1912 static int f2fs_ioc_start_volatile_write(struct file *filp)
1913 {
1914 struct inode *inode = file_inode(filp);
1915 int ret;
1916
1917 if (!inode_owner_or_capable(inode))
1918 return -EACCES;
1919
1920 if (!S_ISREG(inode->i_mode))
1921 return -EINVAL;
1922
1923 ret = mnt_want_write_file(filp);
1924 if (ret)
1925 return ret;
1926
1927 inode_lock(inode);
1928
1929 if (f2fs_is_volatile_file(inode))
1930 goto out;
1931
1932 ret = f2fs_convert_inline_inode(inode);
1933 if (ret)
1934 goto out;
1935
1936 stat_inc_volatile_write(inode);
1937 stat_update_max_volatile_write(inode);
1938
1939 set_inode_flag(inode, FI_VOLATILE_FILE);
1940 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
1941 out:
1942 inode_unlock(inode);
1943 mnt_drop_write_file(filp);
1944 return ret;
1945 }
1946
1947 static int f2fs_ioc_release_volatile_write(struct file *filp)
1948 {
1949 struct inode *inode = file_inode(filp);
1950 int ret;
1951
1952 if (!inode_owner_or_capable(inode))
1953 return -EACCES;
1954
1955 ret = mnt_want_write_file(filp);
1956 if (ret)
1957 return ret;
1958
1959 inode_lock(inode);
1960
1961 if (!f2fs_is_volatile_file(inode))
1962 goto out;
1963
1964 if (!f2fs_is_first_block_written(inode)) {
1965 ret = truncate_partial_data_page(inode, 0, true);
1966 goto out;
1967 }
1968
1969 ret = punch_hole(inode, 0, F2FS_BLKSIZE);
1970 out:
1971 inode_unlock(inode);
1972 mnt_drop_write_file(filp);
1973 return ret;
1974 }
1975
1976 static int f2fs_ioc_abort_volatile_write(struct file *filp)
1977 {
1978 struct inode *inode = file_inode(filp);
1979 int ret;
1980
1981 if (!inode_owner_or_capable(inode))
1982 return -EACCES;
1983
1984 ret = mnt_want_write_file(filp);
1985 if (ret)
1986 return ret;
1987
1988 inode_lock(inode);
1989
1990 if (f2fs_is_atomic_file(inode))
1991 f2fs_drop_inmem_pages(inode);
1992 if (f2fs_is_volatile_file(inode)) {
1993 clear_inode_flag(inode, FI_VOLATILE_FILE);
1994 stat_dec_volatile_write(inode);
1995 ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 0, true);
1996 }
1997
1998 clear_inode_flag(inode, FI_ATOMIC_REVOKE_REQUEST);
1999
2000 inode_unlock(inode);
2001
2002 mnt_drop_write_file(filp);
2003 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
2004 return ret;
2005 }
2006
2007 static int f2fs_ioc_shutdown(struct file *filp, unsigned long arg)
2008 {
2009 struct inode *inode = file_inode(filp);
2010 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2011 struct super_block *sb = sbi->sb;
2012 __u32 in;
2013 int ret = 0;
2014
2015 if (!capable(CAP_SYS_ADMIN))
2016 return -EPERM;
2017
2018 if (get_user(in, (__u32 __user *)arg))
2019 return -EFAULT;
2020
2021 if (in != F2FS_GOING_DOWN_FULLSYNC) {
2022 ret = mnt_want_write_file(filp);
2023 if (ret)
2024 return ret;
2025 }
2026
2027 switch (in) {
2028 case F2FS_GOING_DOWN_FULLSYNC:
2029 sb = freeze_bdev(sb->s_bdev);
2030 if (IS_ERR(sb)) {
2031 ret = PTR_ERR(sb);
2032 goto out;
2033 }
2034 if (sb) {
2035 f2fs_stop_checkpoint(sbi, false);
2036 set_sbi_flag(sbi, SBI_IS_SHUTDOWN);
2037 thaw_bdev(sb->s_bdev, sb);
2038 }
2039 break;
2040 case F2FS_GOING_DOWN_METASYNC:
2041 /* do checkpoint only */
2042 ret = f2fs_sync_fs(sb, 1);
2043 if (ret)
2044 goto out;
2045 f2fs_stop_checkpoint(sbi, false);
2046 set_sbi_flag(sbi, SBI_IS_SHUTDOWN);
2047 break;
2048 case F2FS_GOING_DOWN_NOSYNC:
2049 f2fs_stop_checkpoint(sbi, false);
2050 set_sbi_flag(sbi, SBI_IS_SHUTDOWN);
2051 break;
2052 case F2FS_GOING_DOWN_METAFLUSH:
2053 f2fs_sync_meta_pages(sbi, META, LONG_MAX, FS_META_IO);
2054 f2fs_stop_checkpoint(sbi, false);
2055 set_sbi_flag(sbi, SBI_IS_SHUTDOWN);
2056 break;
2057 case F2FS_GOING_DOWN_NEED_FSCK:
2058 set_sbi_flag(sbi, SBI_NEED_FSCK);
2059 set_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
2060 set_sbi_flag(sbi, SBI_IS_DIRTY);
2061 /* do checkpoint only */
2062 ret = f2fs_sync_fs(sb, 1);
2063 goto out;
2064 default:
2065 ret = -EINVAL;
2066 goto out;
2067 }
2068
2069 f2fs_stop_gc_thread(sbi);
2070 f2fs_stop_discard_thread(sbi);
2071
2072 f2fs_drop_discard_cmd(sbi);
2073 clear_opt(sbi, DISCARD);
2074
2075 f2fs_update_time(sbi, REQ_TIME);
2076 out:
2077 if (in != F2FS_GOING_DOWN_FULLSYNC)
2078 mnt_drop_write_file(filp);
2079
2080 trace_f2fs_shutdown(sbi, in, ret);
2081
2082 return ret;
2083 }
2084
2085 static int f2fs_ioc_fitrim(struct file *filp, unsigned long arg)
2086 {
2087 struct inode *inode = file_inode(filp);
2088 struct super_block *sb = inode->i_sb;
2089 struct request_queue *q = bdev_get_queue(sb->s_bdev);
2090 struct fstrim_range range;
2091 int ret;
2092
2093 if (!capable(CAP_SYS_ADMIN))
2094 return -EPERM;
2095
2096 if (!f2fs_hw_support_discard(F2FS_SB(sb)))
2097 return -EOPNOTSUPP;
2098
2099 if (copy_from_user(&range, (struct fstrim_range __user *)arg,
2100 sizeof(range)))
2101 return -EFAULT;
2102
2103 ret = mnt_want_write_file(filp);
2104 if (ret)
2105 return ret;
2106
2107 range.minlen = max((unsigned int)range.minlen,
2108 q->limits.discard_granularity);
2109 ret = f2fs_trim_fs(F2FS_SB(sb), &range);
2110 mnt_drop_write_file(filp);
2111 if (ret < 0)
2112 return ret;
2113
2114 if (copy_to_user((struct fstrim_range __user *)arg, &range,
2115 sizeof(range)))
2116 return -EFAULT;
2117 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
2118 return 0;
2119 }
2120
2121 static bool uuid_is_nonzero(__u8 u[16])
2122 {
2123 int i;
2124
2125 for (i = 0; i < 16; i++)
2126 if (u[i])
2127 return true;
2128 return false;
2129 }
2130
2131 static int f2fs_ioc_set_encryption_policy(struct file *filp, unsigned long arg)
2132 {
2133 struct inode *inode = file_inode(filp);
2134
2135 if (!f2fs_sb_has_encrypt(F2FS_I_SB(inode)))
2136 return -EOPNOTSUPP;
2137
2138 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
2139
2140 return fscrypt_ioctl_set_policy(filp, (const void __user *)arg);
2141 }
2142
2143 static int f2fs_ioc_get_encryption_policy(struct file *filp, unsigned long arg)
2144 {
2145 if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp))))
2146 return -EOPNOTSUPP;
2147 return fscrypt_ioctl_get_policy(filp, (void __user *)arg);
2148 }
2149
2150 static int f2fs_ioc_get_encryption_pwsalt(struct file *filp, unsigned long arg)
2151 {
2152 struct inode *inode = file_inode(filp);
2153 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2154 int err;
2155
2156 if (!f2fs_sb_has_encrypt(sbi))
2157 return -EOPNOTSUPP;
2158
2159 err = mnt_want_write_file(filp);
2160 if (err)
2161 return err;
2162
2163 down_write(&sbi->sb_lock);
2164
2165 if (uuid_is_nonzero(sbi->raw_super->encrypt_pw_salt))
2166 goto got_it;
2167
2168 /* update superblock with uuid */
2169 generate_random_uuid(sbi->raw_super->encrypt_pw_salt);
2170
2171 err = f2fs_commit_super(sbi, false);
2172 if (err) {
2173 /* undo new data */
2174 memset(sbi->raw_super->encrypt_pw_salt, 0, 16);
2175 goto out_err;
2176 }
2177 got_it:
2178 if (copy_to_user((__u8 __user *)arg, sbi->raw_super->encrypt_pw_salt,
2179 16))
2180 err = -EFAULT;
2181 out_err:
2182 up_write(&sbi->sb_lock);
2183 mnt_drop_write_file(filp);
2184 return err;
2185 }
2186
2187 static int f2fs_ioc_gc(struct file *filp, unsigned long arg)
2188 {
2189 struct inode *inode = file_inode(filp);
2190 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2191 __u32 sync;
2192 int ret;
2193
2194 if (!capable(CAP_SYS_ADMIN))
2195 return -EPERM;
2196
2197 if (get_user(sync, (__u32 __user *)arg))
2198 return -EFAULT;
2199
2200 if (f2fs_readonly(sbi->sb))
2201 return -EROFS;
2202
2203 ret = mnt_want_write_file(filp);
2204 if (ret)
2205 return ret;
2206
2207 if (!sync) {
2208 if (!mutex_trylock(&sbi->gc_mutex)) {
2209 ret = -EBUSY;
2210 goto out;
2211 }
2212 } else {
2213 mutex_lock(&sbi->gc_mutex);
2214 }
2215
2216 ret = f2fs_gc(sbi, sync, true, NULL_SEGNO);
2217 out:
2218 mnt_drop_write_file(filp);
2219 return ret;
2220 }
2221
2222 static int f2fs_ioc_gc_range(struct file *filp, unsigned long arg)
2223 {
2224 struct inode *inode = file_inode(filp);
2225 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2226 struct f2fs_gc_range range;
2227 u64 end;
2228 int ret;
2229
2230 if (!capable(CAP_SYS_ADMIN))
2231 return -EPERM;
2232
2233 if (copy_from_user(&range, (struct f2fs_gc_range __user *)arg,
2234 sizeof(range)))
2235 return -EFAULT;
2236
2237 if (f2fs_readonly(sbi->sb))
2238 return -EROFS;
2239
2240 end = range.start + range.len;
2241 if (range.start < MAIN_BLKADDR(sbi) || end >= MAX_BLKADDR(sbi)) {
2242 return -EINVAL;
2243 }
2244
2245 ret = mnt_want_write_file(filp);
2246 if (ret)
2247 return ret;
2248
2249 do_more:
2250 if (!range.sync) {
2251 if (!mutex_trylock(&sbi->gc_mutex)) {
2252 ret = -EBUSY;
2253 goto out;
2254 }
2255 } else {
2256 mutex_lock(&sbi->gc_mutex);
2257 }
2258
2259 ret = f2fs_gc(sbi, range.sync, true, GET_SEGNO(sbi, range.start));
2260 range.start += BLKS_PER_SEC(sbi);
2261 if (range.start <= end)
2262 goto do_more;
2263 out:
2264 mnt_drop_write_file(filp);
2265 return ret;
2266 }
2267
2268 static int f2fs_ioc_write_checkpoint(struct file *filp, unsigned long arg)
2269 {
2270 struct inode *inode = file_inode(filp);
2271 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2272 int ret;
2273
2274 if (!capable(CAP_SYS_ADMIN))
2275 return -EPERM;
2276
2277 if (f2fs_readonly(sbi->sb))
2278 return -EROFS;
2279
2280 if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
2281 f2fs_info(sbi, "Skipping Checkpoint. Checkpoints currently disabled.");
2282 return -EINVAL;
2283 }
2284
2285 ret = mnt_want_write_file(filp);
2286 if (ret)
2287 return ret;
2288
2289 ret = f2fs_sync_fs(sbi->sb, 1);
2290
2291 mnt_drop_write_file(filp);
2292 return ret;
2293 }
2294
2295 static int f2fs_defragment_range(struct f2fs_sb_info *sbi,
2296 struct file *filp,
2297 struct f2fs_defragment *range)
2298 {
2299 struct inode *inode = file_inode(filp);
2300 struct f2fs_map_blocks map = { .m_next_extent = NULL,
2301 .m_seg_type = NO_CHECK_TYPE ,
2302 .m_may_create = false };
2303 struct extent_info ei = {0, 0, 0};
2304 pgoff_t pg_start, pg_end, next_pgofs;
2305 unsigned int blk_per_seg = sbi->blocks_per_seg;
2306 unsigned int total = 0, sec_num;
2307 block_t blk_end = 0;
2308 bool fragmented = false;
2309 int err;
2310
2311 /* if in-place-update policy is enabled, don't waste time here */
2312 if (f2fs_should_update_inplace(inode, NULL))
2313 return -EINVAL;
2314
2315 pg_start = range->start >> PAGE_SHIFT;
2316 pg_end = (range->start + range->len) >> PAGE_SHIFT;
2317
2318 f2fs_balance_fs(sbi, true);
2319
2320 inode_lock(inode);
2321
2322 /* writeback all dirty pages in the range */
2323 err = filemap_write_and_wait_range(inode->i_mapping, range->start,
2324 range->start + range->len - 1);
2325 if (err)
2326 goto out;
2327
2328 /*
2329 * lookup mapping info in extent cache, skip defragmenting if physical
2330 * block addresses are continuous.
2331 */
2332 if (f2fs_lookup_extent_cache(inode, pg_start, &ei)) {
2333 if (ei.fofs + ei.len >= pg_end)
2334 goto out;
2335 }
2336
2337 map.m_lblk = pg_start;
2338 map.m_next_pgofs = &next_pgofs;
2339
2340 /*
2341 * lookup mapping info in dnode page cache, skip defragmenting if all
2342 * physical block addresses are continuous even if there are hole(s)
2343 * in logical blocks.
2344 */
2345 while (map.m_lblk < pg_end) {
2346 map.m_len = pg_end - map.m_lblk;
2347 err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_DEFAULT);
2348 if (err)
2349 goto out;
2350
2351 if (!(map.m_flags & F2FS_MAP_FLAGS)) {
2352 map.m_lblk = next_pgofs;
2353 continue;
2354 }
2355
2356 if (blk_end && blk_end != map.m_pblk)
2357 fragmented = true;
2358
2359 /* record total count of block that we're going to move */
2360 total += map.m_len;
2361
2362 blk_end = map.m_pblk + map.m_len;
2363
2364 map.m_lblk += map.m_len;
2365 }
2366
2367 if (!fragmented)
2368 goto out;
2369
2370 sec_num = DIV_ROUND_UP(total, BLKS_PER_SEC(sbi));
2371
2372 /*
2373 * make sure there are enough free section for LFS allocation, this can
2374 * avoid defragment running in SSR mode when free section are allocated
2375 * intensively
2376 */
2377 if (has_not_enough_free_secs(sbi, 0, sec_num)) {
2378 err = -EAGAIN;
2379 goto out;
2380 }
2381
2382 map.m_lblk = pg_start;
2383 map.m_len = pg_end - pg_start;
2384 total = 0;
2385
2386 while (map.m_lblk < pg_end) {
2387 pgoff_t idx;
2388 int cnt = 0;
2389
2390 do_map:
2391 map.m_len = pg_end - map.m_lblk;
2392 err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_DEFAULT);
2393 if (err)
2394 goto clear_out;
2395
2396 if (!(map.m_flags & F2FS_MAP_FLAGS)) {
2397 map.m_lblk = next_pgofs;
2398 continue;
2399 }
2400
2401 set_inode_flag(inode, FI_DO_DEFRAG);
2402
2403 idx = map.m_lblk;
2404 while (idx < map.m_lblk + map.m_len && cnt < blk_per_seg) {
2405 struct page *page;
2406
2407 page = f2fs_get_lock_data_page(inode, idx, true);
2408 if (IS_ERR(page)) {
2409 err = PTR_ERR(page);
2410 goto clear_out;
2411 }
2412
2413 set_page_dirty(page);
2414 f2fs_put_page(page, 1);
2415
2416 idx++;
2417 cnt++;
2418 total++;
2419 }
2420
2421 map.m_lblk = idx;
2422
2423 if (idx < pg_end && cnt < blk_per_seg)
2424 goto do_map;
2425
2426 clear_inode_flag(inode, FI_DO_DEFRAG);
2427
2428 err = filemap_fdatawrite(inode->i_mapping);
2429 if (err)
2430 goto out;
2431 }
2432 clear_out:
2433 clear_inode_flag(inode, FI_DO_DEFRAG);
2434 out:
2435 inode_unlock(inode);
2436 if (!err)
2437 range->len = (u64)total << PAGE_SHIFT;
2438 return err;
2439 }
2440
2441 static int f2fs_ioc_defragment(struct file *filp, unsigned long arg)
2442 {
2443 struct inode *inode = file_inode(filp);
2444 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2445 struct f2fs_defragment range;
2446 int err;
2447
2448 if (!capable(CAP_SYS_ADMIN))
2449 return -EPERM;
2450
2451 if (!S_ISREG(inode->i_mode) || f2fs_is_atomic_file(inode))
2452 return -EINVAL;
2453
2454 if (f2fs_readonly(sbi->sb))
2455 return -EROFS;
2456
2457 if (copy_from_user(&range, (struct f2fs_defragment __user *)arg,
2458 sizeof(range)))
2459 return -EFAULT;
2460
2461 /* verify alignment of offset & size */
2462 if (range.start & (F2FS_BLKSIZE - 1) || range.len & (F2FS_BLKSIZE - 1))
2463 return -EINVAL;
2464
2465 if (unlikely((range.start + range.len) >> PAGE_SHIFT >
2466 sbi->max_file_blocks))
2467 return -EINVAL;
2468
2469 err = mnt_want_write_file(filp);
2470 if (err)
2471 return err;
2472
2473 err = f2fs_defragment_range(sbi, filp, &range);
2474 mnt_drop_write_file(filp);
2475
2476 f2fs_update_time(sbi, REQ_TIME);
2477 if (err < 0)
2478 return err;
2479
2480 if (copy_to_user((struct f2fs_defragment __user *)arg, &range,
2481 sizeof(range)))
2482 return -EFAULT;
2483
2484 return 0;
2485 }
2486
2487 static int f2fs_move_file_range(struct file *file_in, loff_t pos_in,
2488 struct file *file_out, loff_t pos_out, size_t len)
2489 {
2490 struct inode *src = file_inode(file_in);
2491 struct inode *dst = file_inode(file_out);
2492 struct f2fs_sb_info *sbi = F2FS_I_SB(src);
2493 size_t olen = len, dst_max_i_size = 0;
2494 size_t dst_osize;
2495 int ret;
2496
2497 if (file_in->f_path.mnt != file_out->f_path.mnt ||
2498 src->i_sb != dst->i_sb)
2499 return -EXDEV;
2500
2501 if (unlikely(f2fs_readonly(src->i_sb)))
2502 return -EROFS;
2503
2504 if (!S_ISREG(src->i_mode) || !S_ISREG(dst->i_mode))
2505 return -EINVAL;
2506
2507 if (IS_ENCRYPTED(src) || IS_ENCRYPTED(dst))
2508 return -EOPNOTSUPP;
2509
2510 if (src == dst) {
2511 if (pos_in == pos_out)
2512 return 0;
2513 if (pos_out > pos_in && pos_out < pos_in + len)
2514 return -EINVAL;
2515 }
2516
2517 inode_lock(src);
2518 if (src != dst) {
2519 ret = -EBUSY;
2520 if (!inode_trylock(dst))
2521 goto out;
2522 }
2523
2524 ret = -EINVAL;
2525 if (pos_in + len > src->i_size || pos_in + len < pos_in)
2526 goto out_unlock;
2527 if (len == 0)
2528 olen = len = src->i_size - pos_in;
2529 if (pos_in + len == src->i_size)
2530 len = ALIGN(src->i_size, F2FS_BLKSIZE) - pos_in;
2531 if (len == 0) {
2532 ret = 0;
2533 goto out_unlock;
2534 }
2535
2536 dst_osize = dst->i_size;
2537 if (pos_out + olen > dst->i_size)
2538 dst_max_i_size = pos_out + olen;
2539
2540 /* verify the end result is block aligned */
2541 if (!IS_ALIGNED(pos_in, F2FS_BLKSIZE) ||
2542 !IS_ALIGNED(pos_in + len, F2FS_BLKSIZE) ||
2543 !IS_ALIGNED(pos_out, F2FS_BLKSIZE))
2544 goto out_unlock;
2545
2546 ret = f2fs_convert_inline_inode(src);
2547 if (ret)
2548 goto out_unlock;
2549
2550 ret = f2fs_convert_inline_inode(dst);
2551 if (ret)
2552 goto out_unlock;
2553
2554 /* write out all dirty pages from offset */
2555 ret = filemap_write_and_wait_range(src->i_mapping,
2556 pos_in, pos_in + len);
2557 if (ret)
2558 goto out_unlock;
2559
2560 ret = filemap_write_and_wait_range(dst->i_mapping,
2561 pos_out, pos_out + len);
2562 if (ret)
2563 goto out_unlock;
2564
2565 f2fs_balance_fs(sbi, true);
2566
2567 down_write(&F2FS_I(src)->i_gc_rwsem[WRITE]);
2568 if (src != dst) {
2569 ret = -EBUSY;
2570 if (!down_write_trylock(&F2FS_I(dst)->i_gc_rwsem[WRITE]))
2571 goto out_src;
2572 }
2573
2574 f2fs_lock_op(sbi);
2575 ret = __exchange_data_block(src, dst, pos_in >> F2FS_BLKSIZE_BITS,
2576 pos_out >> F2FS_BLKSIZE_BITS,
2577 len >> F2FS_BLKSIZE_BITS, false);
2578
2579 if (!ret) {
2580 if (dst_max_i_size)
2581 f2fs_i_size_write(dst, dst_max_i_size);
2582 else if (dst_osize != dst->i_size)
2583 f2fs_i_size_write(dst, dst_osize);
2584 }
2585 f2fs_unlock_op(sbi);
2586
2587 if (src != dst)
2588 up_write(&F2FS_I(dst)->i_gc_rwsem[WRITE]);
2589 out_src:
2590 up_write(&F2FS_I(src)->i_gc_rwsem[WRITE]);
2591 out_unlock:
2592 if (src != dst)
2593 inode_unlock(dst);
2594 out:
2595 inode_unlock(src);
2596 return ret;
2597 }
2598
2599 static int f2fs_ioc_move_range(struct file *filp, unsigned long arg)
2600 {
2601 struct f2fs_move_range range;
2602 struct fd dst;
2603 int err;
2604
2605 if (!(filp->f_mode & FMODE_READ) ||
2606 !(filp->f_mode & FMODE_WRITE))
2607 return -EBADF;
2608
2609 if (copy_from_user(&range, (struct f2fs_move_range __user *)arg,
2610 sizeof(range)))
2611 return -EFAULT;
2612
2613 dst = fdget(range.dst_fd);
2614 if (!dst.file)
2615 return -EBADF;
2616
2617 if (!(dst.file->f_mode & FMODE_WRITE)) {
2618 err = -EBADF;
2619 goto err_out;
2620 }
2621
2622 err = mnt_want_write_file(filp);
2623 if (err)
2624 goto err_out;
2625
2626 err = f2fs_move_file_range(filp, range.pos_in, dst.file,
2627 range.pos_out, range.len);
2628
2629 mnt_drop_write_file(filp);
2630 if (err)
2631 goto err_out;
2632
2633 if (copy_to_user((struct f2fs_move_range __user *)arg,
2634 &range, sizeof(range)))
2635 err = -EFAULT;
2636 err_out:
2637 fdput(dst);
2638 return err;
2639 }
2640
2641 static int f2fs_ioc_flush_device(struct file *filp, unsigned long arg)
2642 {
2643 struct inode *inode = file_inode(filp);
2644 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2645 struct sit_info *sm = SIT_I(sbi);
2646 unsigned int start_segno = 0, end_segno = 0;
2647 unsigned int dev_start_segno = 0, dev_end_segno = 0;
2648 struct f2fs_flush_device range;
2649 int ret;
2650
2651 if (!capable(CAP_SYS_ADMIN))
2652 return -EPERM;
2653
2654 if (f2fs_readonly(sbi->sb))
2655 return -EROFS;
2656
2657 if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
2658 return -EINVAL;
2659
2660 if (copy_from_user(&range, (struct f2fs_flush_device __user *)arg,
2661 sizeof(range)))
2662 return -EFAULT;
2663
2664 if (!f2fs_is_multi_device(sbi) || sbi->s_ndevs - 1 <= range.dev_num ||
2665 __is_large_section(sbi)) {
2666 f2fs_warn(sbi, "Can't flush %u in %d for segs_per_sec %u != 1",
2667 range.dev_num, sbi->s_ndevs, sbi->segs_per_sec);
2668 return -EINVAL;
2669 }
2670
2671 ret = mnt_want_write_file(filp);
2672 if (ret)
2673 return ret;
2674
2675 if (range.dev_num != 0)
2676 dev_start_segno = GET_SEGNO(sbi, FDEV(range.dev_num).start_blk);
2677 dev_end_segno = GET_SEGNO(sbi, FDEV(range.dev_num).end_blk);
2678
2679 start_segno = sm->last_victim[FLUSH_DEVICE];
2680 if (start_segno < dev_start_segno || start_segno >= dev_end_segno)
2681 start_segno = dev_start_segno;
2682 end_segno = min(start_segno + range.segments, dev_end_segno);
2683
2684 while (start_segno < end_segno) {
2685 if (!mutex_trylock(&sbi->gc_mutex)) {
2686 ret = -EBUSY;
2687 goto out;
2688 }
2689 sm->last_victim[GC_CB] = end_segno + 1;
2690 sm->last_victim[GC_GREEDY] = end_segno + 1;
2691 sm->last_victim[ALLOC_NEXT] = end_segno + 1;
2692 ret = f2fs_gc(sbi, true, true, start_segno);
2693 if (ret == -EAGAIN)
2694 ret = 0;
2695 else if (ret < 0)
2696 break;
2697 start_segno++;
2698 }
2699 out:
2700 mnt_drop_write_file(filp);
2701 return ret;
2702 }
2703
2704 static int f2fs_ioc_get_features(struct file *filp, unsigned long arg)
2705 {
2706 struct inode *inode = file_inode(filp);
2707 u32 sb_feature = le32_to_cpu(F2FS_I_SB(inode)->raw_super->feature);
2708
2709 /* Must validate to set it with SQLite behavior in Android. */
2710 sb_feature |= F2FS_FEATURE_ATOMIC_WRITE;
2711
2712 return put_user(sb_feature, (u32 __user *)arg);
2713 }
2714
2715 #ifdef CONFIG_QUOTA
2716 int f2fs_transfer_project_quota(struct inode *inode, kprojid_t kprojid)
2717 {
2718 struct dquot *transfer_to[MAXQUOTAS] = {};
2719 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2720 struct super_block *sb = sbi->sb;
2721 int err = 0;
2722
2723 transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid));
2724 if (!IS_ERR(transfer_to[PRJQUOTA])) {
2725 err = __dquot_transfer(inode, transfer_to);
2726 if (err)
2727 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2728 dqput(transfer_to[PRJQUOTA]);
2729 }
2730 return err;
2731 }
2732
2733 static int f2fs_ioc_setproject(struct file *filp, __u32 projid)
2734 {
2735 struct inode *inode = file_inode(filp);
2736 struct f2fs_inode_info *fi = F2FS_I(inode);
2737 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2738 struct page *ipage;
2739 kprojid_t kprojid;
2740 int err;
2741
2742 if (!f2fs_sb_has_project_quota(sbi)) {
2743 if (projid != F2FS_DEF_PROJID)
2744 return -EOPNOTSUPP;
2745 else
2746 return 0;
2747 }
2748
2749 if (!f2fs_has_extra_attr(inode))
2750 return -EOPNOTSUPP;
2751
2752 kprojid = make_kprojid(&init_user_ns, (projid_t)projid);
2753
2754 if (projid_eq(kprojid, F2FS_I(inode)->i_projid))
2755 return 0;
2756
2757 err = -EPERM;
2758 /* Is it quota file? Do not allow user to mess with it */
2759 if (IS_NOQUOTA(inode))
2760 return err;
2761
2762 ipage = f2fs_get_node_page(sbi, inode->i_ino);
2763 if (IS_ERR(ipage))
2764 return PTR_ERR(ipage);
2765
2766 if (!F2FS_FITS_IN_INODE(F2FS_INODE(ipage), fi->i_extra_isize,
2767 i_projid)) {
2768 err = -EOVERFLOW;
2769 f2fs_put_page(ipage, 1);
2770 return err;
2771 }
2772 f2fs_put_page(ipage, 1);
2773
2774 err = dquot_initialize(inode);
2775 if (err)
2776 return err;
2777
2778 f2fs_lock_op(sbi);
2779 err = f2fs_transfer_project_quota(inode, kprojid);
2780 if (err)
2781 goto out_unlock;
2782
2783 F2FS_I(inode)->i_projid = kprojid;
2784 inode->i_ctime = current_time(inode);
2785 f2fs_mark_inode_dirty_sync(inode, true);
2786 out_unlock:
2787 f2fs_unlock_op(sbi);
2788 return err;
2789 }
2790 #else
2791 int f2fs_transfer_project_quota(struct inode *inode, kprojid_t kprojid)
2792 {
2793 return 0;
2794 }
2795
2796 static int f2fs_ioc_setproject(struct file *filp, __u32 projid)
2797 {
2798 if (projid != F2FS_DEF_PROJID)
2799 return -EOPNOTSUPP;
2800 return 0;
2801 }
2802 #endif
2803
2804 /* FS_IOC_FSGETXATTR and FS_IOC_FSSETXATTR support */
2805
2806 /*
2807 * To make a new on-disk f2fs i_flag gettable via FS_IOC_FSGETXATTR and settable
2808 * via FS_IOC_FSSETXATTR, add an entry for it to f2fs_xflags_map[], and add its
2809 * FS_XFLAG_* equivalent to F2FS_SUPPORTED_XFLAGS.
2810 */
2811
2812 static const struct {
2813 u32 iflag;
2814 u32 xflag;
2815 } f2fs_xflags_map[] = {
2816 { F2FS_SYNC_FL, FS_XFLAG_SYNC },
2817 { F2FS_IMMUTABLE_FL, FS_XFLAG_IMMUTABLE },
2818 { F2FS_APPEND_FL, FS_XFLAG_APPEND },
2819 { F2FS_NODUMP_FL, FS_XFLAG_NODUMP },
2820 { F2FS_NOATIME_FL, FS_XFLAG_NOATIME },
2821 { F2FS_PROJINHERIT_FL, FS_XFLAG_PROJINHERIT },
2822 };
2823
2824 #define F2FS_SUPPORTED_XFLAGS ( \
2825 FS_XFLAG_SYNC | \
2826 FS_XFLAG_IMMUTABLE | \
2827 FS_XFLAG_APPEND | \
2828 FS_XFLAG_NODUMP | \
2829 FS_XFLAG_NOATIME | \
2830 FS_XFLAG_PROJINHERIT)
2831
2832 /* Convert f2fs on-disk i_flags to FS_IOC_FS{GET,SET}XATTR flags */
2833 static inline u32 f2fs_iflags_to_xflags(u32 iflags)
2834 {
2835 u32 xflags = 0;
2836 int i;
2837
2838 for (i = 0; i < ARRAY_SIZE(f2fs_xflags_map); i++)
2839 if (iflags & f2fs_xflags_map[i].iflag)
2840 xflags |= f2fs_xflags_map[i].xflag;
2841
2842 return xflags;
2843 }
2844
2845 /* Convert FS_IOC_FS{GET,SET}XATTR flags to f2fs on-disk i_flags */
2846 static inline u32 f2fs_xflags_to_iflags(u32 xflags)
2847 {
2848 u32 iflags = 0;
2849 int i;
2850
2851 for (i = 0; i < ARRAY_SIZE(f2fs_xflags_map); i++)
2852 if (xflags & f2fs_xflags_map[i].xflag)
2853 iflags |= f2fs_xflags_map[i].iflag;
2854
2855 return iflags;
2856 }
2857
2858 static int f2fs_ioc_fsgetxattr(struct file *filp, unsigned long arg)
2859 {
2860 struct inode *inode = file_inode(filp);
2861 struct f2fs_inode_info *fi = F2FS_I(inode);
2862 struct fsxattr fa;
2863
2864 memset(&fa, 0, sizeof(struct fsxattr));
2865 fa.fsx_xflags = f2fs_iflags_to_xflags(fi->i_flags);
2866
2867 if (f2fs_sb_has_project_quota(F2FS_I_SB(inode)))
2868 fa.fsx_projid = (__u32)from_kprojid(&init_user_ns,
2869 fi->i_projid);
2870
2871 if (copy_to_user((struct fsxattr __user *)arg, &fa, sizeof(fa)))
2872 return -EFAULT;
2873 return 0;
2874 }
2875
2876 static int f2fs_ioctl_check_project(struct inode *inode, struct fsxattr *fa)
2877 {
2878 /*
2879 * Project Quota ID state is only allowed to change from within the init
2880 * namespace. Enforce that restriction only if we are trying to change
2881 * the quota ID state. Everything else is allowed in user namespaces.
2882 */
2883 if (current_user_ns() == &init_user_ns)
2884 return 0;
2885
2886 if (__kprojid_val(F2FS_I(inode)->i_projid) != fa->fsx_projid)
2887 return -EINVAL;
2888
2889 if (F2FS_I(inode)->i_flags & F2FS_PROJINHERIT_FL) {
2890 if (!(fa->fsx_xflags & FS_XFLAG_PROJINHERIT))
2891 return -EINVAL;
2892 } else {
2893 if (fa->fsx_xflags & FS_XFLAG_PROJINHERIT)
2894 return -EINVAL;
2895 }
2896
2897 return 0;
2898 }
2899
2900 static int f2fs_ioc_fssetxattr(struct file *filp, unsigned long arg)
2901 {
2902 struct inode *inode = file_inode(filp);
2903 struct fsxattr fa;
2904 u32 iflags;
2905 int err;
2906
2907 if (copy_from_user(&fa, (struct fsxattr __user *)arg, sizeof(fa)))
2908 return -EFAULT;
2909
2910 /* Make sure caller has proper permission */
2911 if (!inode_owner_or_capable(inode))
2912 return -EACCES;
2913
2914 if (fa.fsx_xflags & ~F2FS_SUPPORTED_XFLAGS)
2915 return -EOPNOTSUPP;
2916
2917 iflags = f2fs_xflags_to_iflags(fa.fsx_xflags);
2918 if (f2fs_mask_flags(inode->i_mode, iflags) != iflags)
2919 return -EOPNOTSUPP;
2920
2921 err = mnt_want_write_file(filp);
2922 if (err)
2923 return err;
2924
2925 inode_lock(inode);
2926 err = f2fs_ioctl_check_project(inode, &fa);
2927 if (err)
2928 goto out;
2929 err = f2fs_setflags_common(inode, iflags,
2930 f2fs_xflags_to_iflags(F2FS_SUPPORTED_XFLAGS));
2931 if (err)
2932 goto out;
2933
2934 err = f2fs_ioc_setproject(filp, fa.fsx_projid);
2935 out:
2936 inode_unlock(inode);
2937 mnt_drop_write_file(filp);
2938 return err;
2939 }
2940
2941 int f2fs_pin_file_control(struct inode *inode, bool inc)
2942 {
2943 struct f2fs_inode_info *fi = F2FS_I(inode);
2944 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2945
2946 /* Use i_gc_failures for normal file as a risk signal. */
2947 if (inc)
2948 f2fs_i_gc_failures_write(inode,
2949 fi->i_gc_failures[GC_FAILURE_PIN] + 1);
2950
2951 if (fi->i_gc_failures[GC_FAILURE_PIN] > sbi->gc_pin_file_threshold) {
2952 f2fs_warn(sbi, "%s: Enable GC = ino %lx after %x GC trials",
2953 __func__, inode->i_ino,
2954 fi->i_gc_failures[GC_FAILURE_PIN]);
2955 clear_inode_flag(inode, FI_PIN_FILE);
2956 return -EAGAIN;
2957 }
2958 return 0;
2959 }
2960
2961 static int f2fs_ioc_set_pin_file(struct file *filp, unsigned long arg)
2962 {
2963 struct inode *inode = file_inode(filp);
2964 __u32 pin;
2965 int ret = 0;
2966
2967 if (get_user(pin, (__u32 __user *)arg))
2968 return -EFAULT;
2969
2970 if (!S_ISREG(inode->i_mode))
2971 return -EINVAL;
2972
2973 if (f2fs_readonly(F2FS_I_SB(inode)->sb))
2974 return -EROFS;
2975
2976 ret = mnt_want_write_file(filp);
2977 if (ret)
2978 return ret;
2979
2980 inode_lock(inode);
2981
2982 if (f2fs_should_update_outplace(inode, NULL)) {
2983 ret = -EINVAL;
2984 goto out;
2985 }
2986
2987 if (!pin) {
2988 clear_inode_flag(inode, FI_PIN_FILE);
2989 f2fs_i_gc_failures_write(inode, 0);
2990 goto done;
2991 }
2992
2993 if (f2fs_pin_file_control(inode, false)) {
2994 ret = -EAGAIN;
2995 goto out;
2996 }
2997 ret = f2fs_convert_inline_inode(inode);
2998 if (ret)
2999 goto out;
3000
3001 set_inode_flag(inode, FI_PIN_FILE);
3002 ret = F2FS_I(inode)->i_gc_failures[GC_FAILURE_PIN];
3003 done:
3004 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
3005 out:
3006 inode_unlock(inode);
3007 mnt_drop_write_file(filp);
3008 return ret;
3009 }
3010
3011 static int f2fs_ioc_get_pin_file(struct file *filp, unsigned long arg)
3012 {
3013 struct inode *inode = file_inode(filp);
3014 __u32 pin = 0;
3015
3016 if (is_inode_flag_set(inode, FI_PIN_FILE))
3017 pin = F2FS_I(inode)->i_gc_failures[GC_FAILURE_PIN];
3018 return put_user(pin, (u32 __user *)arg);
3019 }
3020
3021 int f2fs_precache_extents(struct inode *inode)
3022 {
3023 struct f2fs_inode_info *fi = F2FS_I(inode);
3024 struct f2fs_map_blocks map;
3025 pgoff_t m_next_extent;
3026 loff_t end;
3027 int err;
3028
3029 if (is_inode_flag_set(inode, FI_NO_EXTENT))
3030 return -EOPNOTSUPP;
3031
3032 map.m_lblk = 0;
3033 map.m_next_pgofs = NULL;
3034 map.m_next_extent = &m_next_extent;
3035 map.m_seg_type = NO_CHECK_TYPE;
3036 map.m_may_create = false;
3037 end = F2FS_I_SB(inode)->max_file_blocks;
3038
3039 while (map.m_lblk < end) {
3040 map.m_len = end - map.m_lblk;
3041
3042 down_write(&fi->i_gc_rwsem[WRITE]);
3043 err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_PRECACHE);
3044 up_write(&fi->i_gc_rwsem[WRITE]);
3045 if (err)
3046 return err;
3047
3048 map.m_lblk = m_next_extent;
3049 }
3050
3051 return err;
3052 }
3053
3054 static int f2fs_ioc_precache_extents(struct file *filp, unsigned long arg)
3055 {
3056 return f2fs_precache_extents(file_inode(filp));
3057 }
3058
3059 static int f2fs_ioc_resize_fs(struct file *filp, unsigned long arg)
3060 {
3061 struct f2fs_sb_info *sbi = F2FS_I_SB(file_inode(filp));
3062 __u64 block_count;
3063 int ret;
3064
3065 if (!capable(CAP_SYS_ADMIN))
3066 return -EPERM;
3067
3068 if (f2fs_readonly(sbi->sb))
3069 return -EROFS;
3070
3071 if (copy_from_user(&block_count, (void __user *)arg,
3072 sizeof(block_count)))
3073 return -EFAULT;
3074
3075 ret = f2fs_resize_fs(sbi, block_count);
3076
3077 return ret;
3078 }
3079
3080 long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
3081 {
3082 if (unlikely(f2fs_cp_error(F2FS_I_SB(file_inode(filp)))))
3083 return -EIO;
3084
3085 switch (cmd) {
3086 case F2FS_IOC_GETFLAGS:
3087 return f2fs_ioc_getflags(filp, arg);
3088 case F2FS_IOC_SETFLAGS:
3089 return f2fs_ioc_setflags(filp, arg);
3090 case F2FS_IOC_GETVERSION:
3091 return f2fs_ioc_getversion(filp, arg);
3092 case F2FS_IOC_START_ATOMIC_WRITE:
3093 return f2fs_ioc_start_atomic_write(filp);
3094 case F2FS_IOC_COMMIT_ATOMIC_WRITE:
3095 return f2fs_ioc_commit_atomic_write(filp);
3096 case F2FS_IOC_START_VOLATILE_WRITE:
3097 return f2fs_ioc_start_volatile_write(filp);
3098 case F2FS_IOC_RELEASE_VOLATILE_WRITE:
3099 return f2fs_ioc_release_volatile_write(filp);
3100 case F2FS_IOC_ABORT_VOLATILE_WRITE:
3101 return f2fs_ioc_abort_volatile_write(filp);
3102 case F2FS_IOC_SHUTDOWN:
3103 return f2fs_ioc_shutdown(filp, arg);
3104 case FITRIM:
3105 return f2fs_ioc_fitrim(filp, arg);
3106 case F2FS_IOC_SET_ENCRYPTION_POLICY:
3107 return f2fs_ioc_set_encryption_policy(filp, arg);
3108 case F2FS_IOC_GET_ENCRYPTION_POLICY:
3109 return f2fs_ioc_get_encryption_policy(filp, arg);
3110 case F2FS_IOC_GET_ENCRYPTION_PWSALT:
3111 return f2fs_ioc_get_encryption_pwsalt(filp, arg);
3112 case F2FS_IOC_GARBAGE_COLLECT:
3113 return f2fs_ioc_gc(filp, arg);
3114 case F2FS_IOC_GARBAGE_COLLECT_RANGE:
3115 return f2fs_ioc_gc_range(filp, arg);
3116 case F2FS_IOC_WRITE_CHECKPOINT:
3117 return f2fs_ioc_write_checkpoint(filp, arg);
3118 case F2FS_IOC_DEFRAGMENT:
3119 return f2fs_ioc_defragment(filp, arg);
3120 case F2FS_IOC_MOVE_RANGE:
3121 return f2fs_ioc_move_range(filp, arg);
3122 case F2FS_IOC_FLUSH_DEVICE:
3123 return f2fs_ioc_flush_device(filp, arg);
3124 case F2FS_IOC_GET_FEATURES:
3125 return f2fs_ioc_get_features(filp, arg);
3126 case F2FS_IOC_FSGETXATTR:
3127 return f2fs_ioc_fsgetxattr(filp, arg);
3128 case F2FS_IOC_FSSETXATTR:
3129 return f2fs_ioc_fssetxattr(filp, arg);
3130 case F2FS_IOC_GET_PIN_FILE:
3131 return f2fs_ioc_get_pin_file(filp, arg);
3132 case F2FS_IOC_SET_PIN_FILE:
3133 return f2fs_ioc_set_pin_file(filp, arg);
3134 case F2FS_IOC_PRECACHE_EXTENTS:
3135 return f2fs_ioc_precache_extents(filp, arg);
3136 case F2FS_IOC_RESIZE_FS:
3137 return f2fs_ioc_resize_fs(filp, arg);
3138 default:
3139 return -ENOTTY;
3140 }
3141 }
3142
3143 static ssize_t f2fs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
3144 {
3145 struct file *file = iocb->ki_filp;
3146 struct inode *inode = file_inode(file);
3147 ssize_t ret;
3148
3149 if (unlikely(f2fs_cp_error(F2FS_I_SB(inode)))) {
3150 ret = -EIO;
3151 goto out;
3152 }
3153
3154 if ((iocb->ki_flags & IOCB_NOWAIT) && !(iocb->ki_flags & IOCB_DIRECT)) {
3155 ret = -EINVAL;
3156 goto out;
3157 }
3158
3159 if (!inode_trylock(inode)) {
3160 if (iocb->ki_flags & IOCB_NOWAIT) {
3161 ret = -EAGAIN;
3162 goto out;
3163 }
3164 inode_lock(inode);
3165 }
3166
3167 ret = generic_write_checks(iocb, from);
3168 if (ret > 0) {
3169 bool preallocated = false;
3170 size_t target_size = 0;
3171 int err;
3172
3173 if (iov_iter_fault_in_readable(from, iov_iter_count(from)))
3174 set_inode_flag(inode, FI_NO_PREALLOC);
3175
3176 if ((iocb->ki_flags & IOCB_NOWAIT)) {
3177 if (!f2fs_overwrite_io(inode, iocb->ki_pos,
3178 iov_iter_count(from)) ||
3179 f2fs_has_inline_data(inode) ||
3180 f2fs_force_buffered_io(inode, iocb, from)) {
3181 clear_inode_flag(inode, FI_NO_PREALLOC);
3182 inode_unlock(inode);
3183 ret = -EAGAIN;
3184 goto out;
3185 }
3186 } else {
3187 preallocated = true;
3188 target_size = iocb->ki_pos + iov_iter_count(from);
3189
3190 err = f2fs_preallocate_blocks(iocb, from);
3191 if (err) {
3192 clear_inode_flag(inode, FI_NO_PREALLOC);
3193 inode_unlock(inode);
3194 ret = err;
3195 goto out;
3196 }
3197 }
3198 ret = __generic_file_write_iter(iocb, from);
3199 clear_inode_flag(inode, FI_NO_PREALLOC);
3200
3201 /* if we couldn't write data, we should deallocate blocks. */
3202 if (preallocated && i_size_read(inode) < target_size)
3203 f2fs_truncate(inode);
3204
3205 if (ret > 0)
3206 f2fs_update_iostat(F2FS_I_SB(inode), APP_WRITE_IO, ret);
3207 }
3208 inode_unlock(inode);
3209 out:
3210 trace_f2fs_file_write_iter(inode, iocb->ki_pos,
3211 iov_iter_count(from), ret);
3212 if (ret > 0)
3213 ret = generic_write_sync(iocb, ret);
3214 return ret;
3215 }
3216
3217 #ifdef CONFIG_COMPAT
3218 long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
3219 {
3220 switch (cmd) {
3221 case F2FS_IOC32_GETFLAGS:
3222 cmd = F2FS_IOC_GETFLAGS;
3223 break;
3224 case F2FS_IOC32_SETFLAGS:
3225 cmd = F2FS_IOC_SETFLAGS;
3226 break;
3227 case F2FS_IOC32_GETVERSION:
3228 cmd = F2FS_IOC_GETVERSION;
3229 break;
3230 case F2FS_IOC_START_ATOMIC_WRITE:
3231 case F2FS_IOC_COMMIT_ATOMIC_WRITE:
3232 case F2FS_IOC_START_VOLATILE_WRITE:
3233 case F2FS_IOC_RELEASE_VOLATILE_WRITE:
3234 case F2FS_IOC_ABORT_VOLATILE_WRITE:
3235 case F2FS_IOC_SHUTDOWN:
3236 case F2FS_IOC_SET_ENCRYPTION_POLICY:
3237 case F2FS_IOC_GET_ENCRYPTION_PWSALT:
3238 case F2FS_IOC_GET_ENCRYPTION_POLICY:
3239 case F2FS_IOC_GARBAGE_COLLECT:
3240 case F2FS_IOC_GARBAGE_COLLECT_RANGE:
3241 case F2FS_IOC_WRITE_CHECKPOINT:
3242 case F2FS_IOC_DEFRAGMENT:
3243 case F2FS_IOC_MOVE_RANGE:
3244 case F2FS_IOC_FLUSH_DEVICE:
3245 case F2FS_IOC_GET_FEATURES:
3246 case F2FS_IOC_FSGETXATTR:
3247 case F2FS_IOC_FSSETXATTR:
3248 case F2FS_IOC_GET_PIN_FILE:
3249 case F2FS_IOC_SET_PIN_FILE:
3250 case F2FS_IOC_PRECACHE_EXTENTS:
3251 case F2FS_IOC_RESIZE_FS:
3252 break;
3253 default:
3254 return -ENOIOCTLCMD;
3255 }
3256 return f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
3257 }
3258 #endif
3259
3260 const struct file_operations f2fs_file_operations = {
3261 .llseek = f2fs_llseek,
3262 .read_iter = generic_file_read_iter,
3263 .write_iter = f2fs_file_write_iter,
3264 .open = f2fs_file_open,
3265 .release = f2fs_release_file,
3266 .mmap = f2fs_file_mmap,
3267 .flush = f2fs_file_flush,
3268 .fsync = f2fs_sync_file,
3269 .fallocate = f2fs_fallocate,
3270 .unlocked_ioctl = f2fs_ioctl,
3271 #ifdef CONFIG_COMPAT
3272 .compat_ioctl = f2fs_compat_ioctl,
3273 #endif
3274 .splice_read = generic_file_splice_read,
3275 .splice_write = iter_file_splice_write,
3276 };
Linux with added FPC-III support