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perf bpf: Move perf_event_output() from stdio.h to bpf.h
[linux/fpc-iii.git] / fs / f2fs / file.c
blob88b124677189b9d4b242142dd6d297bade855ab1
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 return ret;
43 }
44
45 static vm_fault_t f2fs_vm_page_mkwrite(struct vm_fault *vmf)
46 {
47 struct page *page = vmf->page;
48 struct inode *inode = file_inode(vmf->vma->vm_file);
49 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
50 struct dnode_of_data dn = { .node_changed = false };
51 int err;
52
53 if (unlikely(f2fs_cp_error(sbi))) {
54 err = -EIO;
55 goto err;
56 }
57
58 sb_start_pagefault(inode->i_sb);
59
60 f2fs_bug_on(sbi, f2fs_has_inline_data(inode));
61
62 file_update_time(vmf->vma->vm_file);
63 down_read(&F2FS_I(inode)->i_mmap_sem);
64 lock_page(page);
65 if (unlikely(page->mapping != inode->i_mapping ||
66 page_offset(page) > i_size_read(inode) ||
67 !PageUptodate(page))) {
68 unlock_page(page);
69 err = -EFAULT;
70 goto out_sem;
71 }
72
73 /* block allocation */
74 __do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO, true);
75 set_new_dnode(&dn, inode, NULL, NULL, 0);
76 err = f2fs_get_block(&dn, page->index);
77 f2fs_put_dnode(&dn);
78 __do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO, false);
79 if (err) {
80 unlock_page(page);
81 goto out_sem;
82 }
83
84 /* fill the page */
85 f2fs_wait_on_page_writeback(page, DATA, false);
86
87 /* wait for GCed page writeback via META_MAPPING */
88 f2fs_wait_on_block_writeback(inode, dn.data_blkaddr);
89
90 /*
91 * check to see if the page is mapped already (no holes)
92 */
93 if (PageMappedToDisk(page))
94 goto out_sem;
95
96 /* page is wholly or partially inside EOF */
97 if (((loff_t)(page->index + 1) << PAGE_SHIFT) >
98 i_size_read(inode)) {
99 loff_t offset;
100
101 offset = i_size_read(inode) & ~PAGE_MASK;
102 zero_user_segment(page, offset, PAGE_SIZE);
103 }
104 set_page_dirty(page);
105 if (!PageUptodate(page))
106 SetPageUptodate(page);
107
108 f2fs_update_iostat(sbi, APP_MAPPED_IO, F2FS_BLKSIZE);
109 f2fs_update_time(sbi, REQ_TIME);
110
111 trace_f2fs_vm_page_mkwrite(page, DATA);
112 out_sem:
113 up_read(&F2FS_I(inode)->i_mmap_sem);
114
115 f2fs_balance_fs(sbi, dn.node_changed);
116
117 sb_end_pagefault(inode->i_sb);
118 err:
119 return block_page_mkwrite_return(err);
120 }
121
122 static const struct vm_operations_struct f2fs_file_vm_ops = {
123 .fault = f2fs_filemap_fault,
124 .map_pages = filemap_map_pages,
125 .page_mkwrite = f2fs_vm_page_mkwrite,
126 };
127
128 static int get_parent_ino(struct inode *inode, nid_t *pino)
129 {
130 struct dentry *dentry;
131
132 inode = igrab(inode);
133 dentry = d_find_any_alias(inode);
134 iput(inode);
135 if (!dentry)
136 return 0;
137
138 *pino = parent_ino(dentry);
139 dput(dentry);
140 return 1;
141 }
142
143 static inline enum cp_reason_type need_do_checkpoint(struct inode *inode)
144 {
145 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
146 enum cp_reason_type cp_reason = CP_NO_NEEDED;
147
148 if (!S_ISREG(inode->i_mode))
149 cp_reason = CP_NON_REGULAR;
150 else if (inode->i_nlink != 1)
151 cp_reason = CP_HARDLINK;
152 else if (is_sbi_flag_set(sbi, SBI_NEED_CP))
153 cp_reason = CP_SB_NEED_CP;
154 else if (file_wrong_pino(inode))
155 cp_reason = CP_WRONG_PINO;
156 else if (!f2fs_space_for_roll_forward(sbi))
157 cp_reason = CP_NO_SPC_ROLL;
158 else if (!f2fs_is_checkpointed_node(sbi, F2FS_I(inode)->i_pino))
159 cp_reason = CP_NODE_NEED_CP;
160 else if (test_opt(sbi, FASTBOOT))
161 cp_reason = CP_FASTBOOT_MODE;
162 else if (F2FS_OPTION(sbi).active_logs == 2)
163 cp_reason = CP_SPEC_LOG_NUM;
164 else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT &&
165 f2fs_need_dentry_mark(sbi, inode->i_ino) &&
166 f2fs_exist_written_data(sbi, F2FS_I(inode)->i_pino,
167 TRANS_DIR_INO))
168 cp_reason = CP_RECOVER_DIR;
169
170 return cp_reason;
171 }
172
173 static bool need_inode_page_update(struct f2fs_sb_info *sbi, nid_t ino)
174 {
175 struct page *i = find_get_page(NODE_MAPPING(sbi), ino);
176 bool ret = false;
177 /* But we need to avoid that there are some inode updates */
178 if ((i && PageDirty(i)) || f2fs_need_inode_block_update(sbi, ino))
179 ret = true;
180 f2fs_put_page(i, 0);
181 return ret;
182 }
183
184 static void try_to_fix_pino(struct inode *inode)
185 {
186 struct f2fs_inode_info *fi = F2FS_I(inode);
187 nid_t pino;
188
189 down_write(&fi->i_sem);
190 if (file_wrong_pino(inode) && inode->i_nlink == 1 &&
191 get_parent_ino(inode, &pino)) {
192 f2fs_i_pino_write(inode, pino);
193 file_got_pino(inode);
194 }
195 up_write(&fi->i_sem);
196 }
197
198 static int f2fs_do_sync_file(struct file *file, loff_t start, loff_t end,
199 int datasync, bool atomic)
200 {
201 struct inode *inode = file->f_mapping->host;
202 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
203 nid_t ino = inode->i_ino;
204 int ret = 0;
205 enum cp_reason_type cp_reason = 0;
206 struct writeback_control wbc = {
207 .sync_mode = WB_SYNC_ALL,
208 .nr_to_write = LONG_MAX,
209 .for_reclaim = 0,
210 };
211 unsigned int seq_id = 0;
212
213 if (unlikely(f2fs_readonly(inode->i_sb) ||
214 is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
215 return 0;
216
217 trace_f2fs_sync_file_enter(inode);
218
219 /* if fdatasync is triggered, let's do in-place-update */
220 if (datasync || get_dirty_pages(inode) <= SM_I(sbi)->min_fsync_blocks)
221 set_inode_flag(inode, FI_NEED_IPU);
222 ret = file_write_and_wait_range(file, start, end);
223 clear_inode_flag(inode, FI_NEED_IPU);
224
225 if (ret) {
226 trace_f2fs_sync_file_exit(inode, cp_reason, datasync, ret);
227 return ret;
228 }
229
230 /* if the inode is dirty, let's recover all the time */
231 if (!f2fs_skip_inode_update(inode, datasync)) {
232 f2fs_write_inode(inode, NULL);
233 goto go_write;
234 }
235
236 /*
237 * if there is no written data, don't waste time to write recovery info.
238 */
239 if (!is_inode_flag_set(inode, FI_APPEND_WRITE) &&
240 !f2fs_exist_written_data(sbi, ino, APPEND_INO)) {
241
242 /* it may call write_inode just prior to fsync */
243 if (need_inode_page_update(sbi, ino))
244 goto go_write;
245
246 if (is_inode_flag_set(inode, FI_UPDATE_WRITE) ||
247 f2fs_exist_written_data(sbi, ino, UPDATE_INO))
248 goto flush_out;
249 goto out;
250 }
251 go_write:
252 /*
253 * Both of fdatasync() and fsync() are able to be recovered from
254 * sudden-power-off.
255 */
256 down_read(&F2FS_I(inode)->i_sem);
257 cp_reason = need_do_checkpoint(inode);
258 up_read(&F2FS_I(inode)->i_sem);
259
260 if (cp_reason) {
261 /* all the dirty node pages should be flushed for POR */
262 ret = f2fs_sync_fs(inode->i_sb, 1);
263
264 /*
265 * We've secured consistency through sync_fs. Following pino
266 * will be used only for fsynced inodes after checkpoint.
267 */
268 try_to_fix_pino(inode);
269 clear_inode_flag(inode, FI_APPEND_WRITE);
270 clear_inode_flag(inode, FI_UPDATE_WRITE);
271 goto out;
272 }
273 sync_nodes:
274 atomic_inc(&sbi->wb_sync_req[NODE]);
275 ret = f2fs_fsync_node_pages(sbi, inode, &wbc, atomic, &seq_id);
276 atomic_dec(&sbi->wb_sync_req[NODE]);
277 if (ret)
278 goto out;
279
280 /* if cp_error was enabled, we should avoid infinite loop */
281 if (unlikely(f2fs_cp_error(sbi))) {
282 ret = -EIO;
283 goto out;
284 }
285
286 if (f2fs_need_inode_block_update(sbi, ino)) {
287 f2fs_mark_inode_dirty_sync(inode, true);
288 f2fs_write_inode(inode, NULL);
289 goto sync_nodes;
290 }
291
292 /*
293 * If it's atomic_write, it's just fine to keep write ordering. So
294 * here we don't need to wait for node write completion, since we use
295 * node chain which serializes node blocks. If one of node writes are
296 * reordered, we can see simply broken chain, resulting in stopping
297 * roll-forward recovery. It means we'll recover all or none node blocks
298 * given fsync mark.
299 */
300 if (!atomic) {
301 ret = f2fs_wait_on_node_pages_writeback(sbi, seq_id);
302 if (ret)
303 goto out;
304 }
305
306 /* once recovery info is written, don't need to tack this */
307 f2fs_remove_ino_entry(sbi, ino, APPEND_INO);
308 clear_inode_flag(inode, FI_APPEND_WRITE);
309 flush_out:
310 if (!atomic && F2FS_OPTION(sbi).fsync_mode != FSYNC_MODE_NOBARRIER)
311 ret = f2fs_issue_flush(sbi, inode->i_ino);
312 if (!ret) {
313 f2fs_remove_ino_entry(sbi, ino, UPDATE_INO);
314 clear_inode_flag(inode, FI_UPDATE_WRITE);
315 f2fs_remove_ino_entry(sbi, ino, FLUSH_INO);
316 }
317 f2fs_update_time(sbi, REQ_TIME);
318 out:
319 trace_f2fs_sync_file_exit(inode, cp_reason, datasync, ret);
320 f2fs_trace_ios(NULL, 1);
321 return ret;
322 }
323
324 int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
325 {
326 if (unlikely(f2fs_cp_error(F2FS_I_SB(file_inode(file)))))
327 return -EIO;
328 return f2fs_do_sync_file(file, start, end, datasync, false);
329 }
330
331 static pgoff_t __get_first_dirty_index(struct address_space *mapping,
332 pgoff_t pgofs, int whence)
333 {
334 struct page *page;
335 int nr_pages;
336
337 if (whence != SEEK_DATA)
338 return 0;
339
340 /* find first dirty page index */
341 nr_pages = find_get_pages_tag(mapping, &pgofs, PAGECACHE_TAG_DIRTY,
342 1, &page);
343 if (!nr_pages)
344 return ULONG_MAX;
345 pgofs = page->index;
346 put_page(page);
347 return pgofs;
348 }
349
350 static bool __found_offset(struct f2fs_sb_info *sbi, block_t blkaddr,
351 pgoff_t dirty, pgoff_t pgofs, int whence)
352 {
353 switch (whence) {
354 case SEEK_DATA:
355 if ((blkaddr == NEW_ADDR && dirty == pgofs) ||
356 is_valid_data_blkaddr(sbi, blkaddr))
357 return true;
358 break;
359 case SEEK_HOLE:
360 if (blkaddr == NULL_ADDR)
361 return true;
362 break;
363 }
364 return false;
365 }
366
367 static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence)
368 {
369 struct inode *inode = file->f_mapping->host;
370 loff_t maxbytes = inode->i_sb->s_maxbytes;
371 struct dnode_of_data dn;
372 pgoff_t pgofs, end_offset, dirty;
373 loff_t data_ofs = offset;
374 loff_t isize;
375 int err = 0;
376
377 inode_lock(inode);
378
379 isize = i_size_read(inode);
380 if (offset >= isize)
381 goto fail;
382
383 /* handle inline data case */
384 if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode)) {
385 if (whence == SEEK_HOLE)
386 data_ofs = isize;
387 goto found;
388 }
389
390 pgofs = (pgoff_t)(offset >> PAGE_SHIFT);
391
392 dirty = __get_first_dirty_index(inode->i_mapping, pgofs, whence);
393
394 for (; data_ofs < isize; data_ofs = (loff_t)pgofs << PAGE_SHIFT) {
395 set_new_dnode(&dn, inode, NULL, NULL, 0);
396 err = f2fs_get_dnode_of_data(&dn, pgofs, LOOKUP_NODE);
397 if (err && err != -ENOENT) {
398 goto fail;
399 } else if (err == -ENOENT) {
400 /* direct node does not exists */
401 if (whence == SEEK_DATA) {
402 pgofs = f2fs_get_next_page_offset(&dn, pgofs);
403 continue;
404 } else {
405 goto found;
406 }
407 }
408
409 end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
410
411 /* find data/hole in dnode block */
412 for (; dn.ofs_in_node < end_offset;
413 dn.ofs_in_node++, pgofs++,
414 data_ofs = (loff_t)pgofs << PAGE_SHIFT) {
415 block_t blkaddr;
416
417 blkaddr = datablock_addr(dn.inode,
418 dn.node_page, dn.ofs_in_node);
419
420 if (__is_valid_data_blkaddr(blkaddr) &&
421 !f2fs_is_valid_blkaddr(F2FS_I_SB(inode),
422 blkaddr, DATA_GENERIC)) {
423 f2fs_put_dnode(&dn);
424 goto fail;
425 }
426
427 if (__found_offset(F2FS_I_SB(inode), blkaddr, dirty,
428 pgofs, whence)) {
429 f2fs_put_dnode(&dn);
430 goto found;
431 }
432 }
433 f2fs_put_dnode(&dn);
434 }
435
436 if (whence == SEEK_DATA)
437 goto fail;
438 found:
439 if (whence == SEEK_HOLE && data_ofs > isize)
440 data_ofs = isize;
441 inode_unlock(inode);
442 return vfs_setpos(file, data_ofs, maxbytes);
443 fail:
444 inode_unlock(inode);
445 return -ENXIO;
446 }
447
448 static loff_t f2fs_llseek(struct file *file, loff_t offset, int whence)
449 {
450 struct inode *inode = file->f_mapping->host;
451 loff_t maxbytes = inode->i_sb->s_maxbytes;
452
453 switch (whence) {
454 case SEEK_SET:
455 case SEEK_CUR:
456 case SEEK_END:
457 return generic_file_llseek_size(file, offset, whence,
458 maxbytes, i_size_read(inode));
459 case SEEK_DATA:
460 case SEEK_HOLE:
461 if (offset < 0)
462 return -ENXIO;
463 return f2fs_seek_block(file, offset, whence);
464 }
465
466 return -EINVAL;
467 }
468
469 static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma)
470 {
471 struct inode *inode = file_inode(file);
472 int err;
473
474 if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
475 return -EIO;
476
477 /* we don't need to use inline_data strictly */
478 err = f2fs_convert_inline_inode(inode);
479 if (err)
480 return err;
481
482 file_accessed(file);
483 vma->vm_ops = &f2fs_file_vm_ops;
484 return 0;
485 }
486
487 static int f2fs_file_open(struct inode *inode, struct file *filp)
488 {
489 int err = fscrypt_file_open(inode, filp);
490
491 if (err)
492 return err;
493
494 filp->f_mode |= FMODE_NOWAIT;
495
496 return dquot_file_open(inode, filp);
497 }
498
499 void f2fs_truncate_data_blocks_range(struct dnode_of_data *dn, int count)
500 {
501 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
502 struct f2fs_node *raw_node;
503 int nr_free = 0, ofs = dn->ofs_in_node, len = count;
504 __le32 *addr;
505 int base = 0;
506
507 if (IS_INODE(dn->node_page) && f2fs_has_extra_attr(dn->inode))
508 base = get_extra_isize(dn->inode);
509
510 raw_node = F2FS_NODE(dn->node_page);
511 addr = blkaddr_in_node(raw_node) + base + ofs;
512
513 for (; count > 0; count--, addr++, dn->ofs_in_node++) {
514 block_t blkaddr = le32_to_cpu(*addr);
515
516 if (blkaddr == NULL_ADDR)
517 continue;
518
519 dn->data_blkaddr = NULL_ADDR;
520 f2fs_set_data_blkaddr(dn);
521
522 if (__is_valid_data_blkaddr(blkaddr) &&
523 !f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC))
524 continue;
525
526 f2fs_invalidate_blocks(sbi, blkaddr);
527 if (dn->ofs_in_node == 0 && IS_INODE(dn->node_page))
528 clear_inode_flag(dn->inode, FI_FIRST_BLOCK_WRITTEN);
529 nr_free++;
530 }
531
532 if (nr_free) {
533 pgoff_t fofs;
534 /*
535 * once we invalidate valid blkaddr in range [ofs, ofs + count],
536 * we will invalidate all blkaddr in the whole range.
537 */
538 fofs = f2fs_start_bidx_of_node(ofs_of_node(dn->node_page),
539 dn->inode) + ofs;
540 f2fs_update_extent_cache_range(dn, fofs, 0, len);
541 dec_valid_block_count(sbi, dn->inode, nr_free);
542 }
543 dn->ofs_in_node = ofs;
544
545 f2fs_update_time(sbi, REQ_TIME);
546 trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid,
547 dn->ofs_in_node, nr_free);
548 }
549
550 void f2fs_truncate_data_blocks(struct dnode_of_data *dn)
551 {
552 f2fs_truncate_data_blocks_range(dn, ADDRS_PER_BLOCK);
553 }
554
555 static int truncate_partial_data_page(struct inode *inode, u64 from,
556 bool cache_only)
557 {
558 loff_t offset = from & (PAGE_SIZE - 1);
559 pgoff_t index = from >> PAGE_SHIFT;
560 struct address_space *mapping = inode->i_mapping;
561 struct page *page;
562
563 if (!offset && !cache_only)
564 return 0;
565
566 if (cache_only) {
567 page = find_lock_page(mapping, index);
568 if (page && PageUptodate(page))
569 goto truncate_out;
570 f2fs_put_page(page, 1);
571 return 0;
572 }
573
574 page = f2fs_get_lock_data_page(inode, index, true);
575 if (IS_ERR(page))
576 return PTR_ERR(page) == -ENOENT ? 0 : PTR_ERR(page);
577 truncate_out:
578 f2fs_wait_on_page_writeback(page, DATA, true);
579 zero_user(page, offset, PAGE_SIZE - offset);
580
581 /* An encrypted inode should have a key and truncate the last page. */
582 f2fs_bug_on(F2FS_I_SB(inode), cache_only && f2fs_encrypted_inode(inode));
583 if (!cache_only)
584 set_page_dirty(page);
585 f2fs_put_page(page, 1);
586 return 0;
587 }
588
589 int f2fs_truncate_blocks(struct inode *inode, u64 from, bool lock,
590 bool buf_write)
591 {
592 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
593 struct dnode_of_data dn;
594 pgoff_t free_from;
595 int count = 0, err = 0;
596 struct page *ipage;
597 bool truncate_page = false;
598 int flag = buf_write ? F2FS_GET_BLOCK_PRE_AIO : F2FS_GET_BLOCK_PRE_DIO;
599
600 trace_f2fs_truncate_blocks_enter(inode, from);
601
602 free_from = (pgoff_t)F2FS_BLK_ALIGN(from);
603
604 if (free_from >= sbi->max_file_blocks)
605 goto free_partial;
606
607 if (lock)
608 __do_map_lock(sbi, flag, true);
609
610 ipage = f2fs_get_node_page(sbi, inode->i_ino);
611 if (IS_ERR(ipage)) {
612 err = PTR_ERR(ipage);
613 goto out;
614 }
615
616 if (f2fs_has_inline_data(inode)) {
617 f2fs_truncate_inline_inode(inode, ipage, from);
618 f2fs_put_page(ipage, 1);
619 truncate_page = true;
620 goto out;
621 }
622
623 set_new_dnode(&dn, inode, ipage, NULL, 0);
624 err = f2fs_get_dnode_of_data(&dn, free_from, LOOKUP_NODE_RA);
625 if (err) {
626 if (err == -ENOENT)
627 goto free_next;
628 goto out;
629 }
630
631 count = ADDRS_PER_PAGE(dn.node_page, inode);
632
633 count -= dn.ofs_in_node;
634 f2fs_bug_on(sbi, count < 0);
635
636 if (dn.ofs_in_node || IS_INODE(dn.node_page)) {
637 f2fs_truncate_data_blocks_range(&dn, count);
638 free_from += count;
639 }
640
641 f2fs_put_dnode(&dn);
642 free_next:
643 err = f2fs_truncate_inode_blocks(inode, free_from);
644 out:
645 if (lock)
646 __do_map_lock(sbi, flag, false);
647 free_partial:
648 /* lastly zero out the first data page */
649 if (!err)
650 err = truncate_partial_data_page(inode, from, truncate_page);
651
652 trace_f2fs_truncate_blocks_exit(inode, err);
653 return err;
654 }
655
656 int f2fs_truncate(struct inode *inode)
657 {
658 int err;
659
660 if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
661 return -EIO;
662
663 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
664 S_ISLNK(inode->i_mode)))
665 return 0;
666
667 trace_f2fs_truncate(inode);
668
669 if (time_to_inject(F2FS_I_SB(inode), FAULT_TRUNCATE)) {
670 f2fs_show_injection_info(FAULT_TRUNCATE);
671 return -EIO;
672 }
673
674 /* we should check inline_data size */
675 if (!f2fs_may_inline_data(inode)) {
676 err = f2fs_convert_inline_inode(inode);
677 if (err)
678 return err;
679 }
680
681 err = f2fs_truncate_blocks(inode, i_size_read(inode), true, false);
682 if (err)
683 return err;
684
685 inode->i_mtime = inode->i_ctime = current_time(inode);
686 f2fs_mark_inode_dirty_sync(inode, false);
687 return 0;
688 }
689
690 int f2fs_getattr(const struct path *path, struct kstat *stat,
691 u32 request_mask, unsigned int query_flags)
692 {
693 struct inode *inode = d_inode(path->dentry);
694 struct f2fs_inode_info *fi = F2FS_I(inode);
695 struct f2fs_inode *ri;
696 unsigned int flags;
697
698 if (f2fs_has_extra_attr(inode) &&
699 f2fs_sb_has_inode_crtime(inode->i_sb) &&
700 F2FS_FITS_IN_INODE(ri, fi->i_extra_isize, i_crtime)) {
701 stat->result_mask |= STATX_BTIME;
702 stat->btime.tv_sec = fi->i_crtime.tv_sec;
703 stat->btime.tv_nsec = fi->i_crtime.tv_nsec;
704 }
705
706 flags = fi->i_flags & F2FS_FL_USER_VISIBLE;
707 if (flags & F2FS_APPEND_FL)
708 stat->attributes |= STATX_ATTR_APPEND;
709 if (flags & F2FS_COMPR_FL)
710 stat->attributes |= STATX_ATTR_COMPRESSED;
711 if (f2fs_encrypted_inode(inode))
712 stat->attributes |= STATX_ATTR_ENCRYPTED;
713 if (flags & F2FS_IMMUTABLE_FL)
714 stat->attributes |= STATX_ATTR_IMMUTABLE;
715 if (flags & F2FS_NODUMP_FL)
716 stat->attributes |= STATX_ATTR_NODUMP;
717
718 stat->attributes_mask |= (STATX_ATTR_APPEND |
719 STATX_ATTR_COMPRESSED |
720 STATX_ATTR_ENCRYPTED |
721 STATX_ATTR_IMMUTABLE |
722 STATX_ATTR_NODUMP);
723
724 generic_fillattr(inode, stat);
725
726 /* we need to show initial sectors used for inline_data/dentries */
727 if ((S_ISREG(inode->i_mode) && f2fs_has_inline_data(inode)) ||
728 f2fs_has_inline_dentry(inode))
729 stat->blocks += (stat->size + 511) >> 9;
730
731 return 0;
732 }
733
734 #ifdef CONFIG_F2FS_FS_POSIX_ACL
735 static void __setattr_copy(struct inode *inode, const struct iattr *attr)
736 {
737 unsigned int ia_valid = attr->ia_valid;
738
739 if (ia_valid & ATTR_UID)
740 inode->i_uid = attr->ia_uid;
741 if (ia_valid & ATTR_GID)
742 inode->i_gid = attr->ia_gid;
743 if (ia_valid & ATTR_ATIME)
744 inode->i_atime = timespec64_trunc(attr->ia_atime,
745 inode->i_sb->s_time_gran);
746 if (ia_valid & ATTR_MTIME)
747 inode->i_mtime = timespec64_trunc(attr->ia_mtime,
748 inode->i_sb->s_time_gran);
749 if (ia_valid & ATTR_CTIME)
750 inode->i_ctime = timespec64_trunc(attr->ia_ctime,
751 inode->i_sb->s_time_gran);
752 if (ia_valid & ATTR_MODE) {
753 umode_t mode = attr->ia_mode;
754
755 if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
756 mode &= ~S_ISGID;
757 set_acl_inode(inode, mode);
758 }
759 }
760 #else
761 #define __setattr_copy setattr_copy
762 #endif
763
764 int f2fs_setattr(struct dentry *dentry, struct iattr *attr)
765 {
766 struct inode *inode = d_inode(dentry);
767 int err;
768 bool size_changed = false;
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 size_changed = true;
845 }
846
847 __setattr_copy(inode, attr);
848
849 if (attr->ia_valid & ATTR_MODE) {
850 err = posix_acl_chmod(inode, f2fs_get_inode_mode(inode));
851 if (err || is_inode_flag_set(inode, FI_ACL_MODE)) {
852 inode->i_mode = F2FS_I(inode)->i_acl_mode;
853 clear_inode_flag(inode, FI_ACL_MODE);
854 }
855 }
856
857 /* file size may changed here */
858 f2fs_mark_inode_dirty_sync(inode, size_changed);
859
860 /* inode change will produce dirty node pages flushed by checkpoint */
861 f2fs_balance_fs(F2FS_I_SB(inode), true);
862
863 return err;
864 }
865
866 const struct inode_operations f2fs_file_inode_operations = {
867 .getattr = f2fs_getattr,
868 .setattr = f2fs_setattr,
869 .get_acl = f2fs_get_acl,
870 .set_acl = f2fs_set_acl,
871 #ifdef CONFIG_F2FS_FS_XATTR
872 .listxattr = f2fs_listxattr,
873 #endif
874 .fiemap = f2fs_fiemap,
875 };
876
877 static int fill_zero(struct inode *inode, pgoff_t index,
878 loff_t start, loff_t len)
879 {
880 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
881 struct page *page;
882
883 if (!len)
884 return 0;
885
886 f2fs_balance_fs(sbi, true);
887
888 f2fs_lock_op(sbi);
889 page = f2fs_get_new_data_page(inode, NULL, index, false);
890 f2fs_unlock_op(sbi);
891
892 if (IS_ERR(page))
893 return PTR_ERR(page);
894
895 f2fs_wait_on_page_writeback(page, DATA, true);
896 zero_user(page, start, len);
897 set_page_dirty(page);
898 f2fs_put_page(page, 1);
899 return 0;
900 }
901
902 int f2fs_truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end)
903 {
904 int err;
905
906 while (pg_start < pg_end) {
907 struct dnode_of_data dn;
908 pgoff_t end_offset, count;
909
910 set_new_dnode(&dn, inode, NULL, NULL, 0);
911 err = f2fs_get_dnode_of_data(&dn, pg_start, LOOKUP_NODE);
912 if (err) {
913 if (err == -ENOENT) {
914 pg_start = f2fs_get_next_page_offset(&dn,
915 pg_start);
916 continue;
917 }
918 return err;
919 }
920
921 end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
922 count = min(end_offset - dn.ofs_in_node, pg_end - pg_start);
923
924 f2fs_bug_on(F2FS_I_SB(inode), count == 0 || count > end_offset);
925
926 f2fs_truncate_data_blocks_range(&dn, count);
927 f2fs_put_dnode(&dn);
928
929 pg_start += count;
930 }
931 return 0;
932 }
933
934 static int punch_hole(struct inode *inode, loff_t offset, loff_t len)
935 {
936 pgoff_t pg_start, pg_end;
937 loff_t off_start, off_end;
938 int ret;
939
940 ret = f2fs_convert_inline_inode(inode);
941 if (ret)
942 return ret;
943
944 pg_start = ((unsigned long long) offset) >> PAGE_SHIFT;
945 pg_end = ((unsigned long long) offset + len) >> PAGE_SHIFT;
946
947 off_start = offset & (PAGE_SIZE - 1);
948 off_end = (offset + len) & (PAGE_SIZE - 1);
949
950 if (pg_start == pg_end) {
951 ret = fill_zero(inode, pg_start, off_start,
952 off_end - off_start);
953 if (ret)
954 return ret;
955 } else {
956 if (off_start) {
957 ret = fill_zero(inode, pg_start++, off_start,
958 PAGE_SIZE - off_start);
959 if (ret)
960 return ret;
961 }
962 if (off_end) {
963 ret = fill_zero(inode, pg_end, 0, off_end);
964 if (ret)
965 return ret;
966 }
967
968 if (pg_start < pg_end) {
969 struct address_space *mapping = inode->i_mapping;
970 loff_t blk_start, blk_end;
971 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
972
973 f2fs_balance_fs(sbi, true);
974
975 blk_start = (loff_t)pg_start << PAGE_SHIFT;
976 blk_end = (loff_t)pg_end << PAGE_SHIFT;
977
978 down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
979 down_write(&F2FS_I(inode)->i_mmap_sem);
980
981 truncate_inode_pages_range(mapping, blk_start,
982 blk_end - 1);
983
984 f2fs_lock_op(sbi);
985 ret = f2fs_truncate_hole(inode, pg_start, pg_end);
986 f2fs_unlock_op(sbi);
987
988 up_write(&F2FS_I(inode)->i_mmap_sem);
989 up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
990 }
991 }
992
993 return ret;
994 }
995
996 static int __read_out_blkaddrs(struct inode *inode, block_t *blkaddr,
997 int *do_replace, pgoff_t off, pgoff_t len)
998 {
999 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1000 struct dnode_of_data dn;
1001 int ret, done, i;
1002
1003 next_dnode:
1004 set_new_dnode(&dn, inode, NULL, NULL, 0);
1005 ret = f2fs_get_dnode_of_data(&dn, off, LOOKUP_NODE_RA);
1006 if (ret && ret != -ENOENT) {
1007 return ret;
1008 } else if (ret == -ENOENT) {
1009 if (dn.max_level == 0)
1010 return -ENOENT;
1011 done = min((pgoff_t)ADDRS_PER_BLOCK - dn.ofs_in_node, len);
1012 blkaddr += done;
1013 do_replace += done;
1014 goto next;
1015 }
1016
1017 done = min((pgoff_t)ADDRS_PER_PAGE(dn.node_page, inode) -
1018 dn.ofs_in_node, len);
1019 for (i = 0; i < done; i++, blkaddr++, do_replace++, dn.ofs_in_node++) {
1020 *blkaddr = datablock_addr(dn.inode,
1021 dn.node_page, dn.ofs_in_node);
1022 if (!f2fs_is_checkpointed_data(sbi, *blkaddr)) {
1023
1024 if (test_opt(sbi, LFS)) {
1025 f2fs_put_dnode(&dn);
1026 return -ENOTSUPP;
1027 }
1028
1029 /* do not invalidate this block address */
1030 f2fs_update_data_blkaddr(&dn, NULL_ADDR);
1031 *do_replace = 1;
1032 }
1033 }
1034 f2fs_put_dnode(&dn);
1035 next:
1036 len -= done;
1037 off += done;
1038 if (len)
1039 goto next_dnode;
1040 return 0;
1041 }
1042
1043 static int __roll_back_blkaddrs(struct inode *inode, block_t *blkaddr,
1044 int *do_replace, pgoff_t off, int len)
1045 {
1046 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1047 struct dnode_of_data dn;
1048 int ret, i;
1049
1050 for (i = 0; i < len; i++, do_replace++, blkaddr++) {
1051 if (*do_replace == 0)
1052 continue;
1053
1054 set_new_dnode(&dn, inode, NULL, NULL, 0);
1055 ret = f2fs_get_dnode_of_data(&dn, off + i, LOOKUP_NODE_RA);
1056 if (ret) {
1057 dec_valid_block_count(sbi, inode, 1);
1058 f2fs_invalidate_blocks(sbi, *blkaddr);
1059 } else {
1060 f2fs_update_data_blkaddr(&dn, *blkaddr);
1061 }
1062 f2fs_put_dnode(&dn);
1063 }
1064 return 0;
1065 }
1066
1067 static int __clone_blkaddrs(struct inode *src_inode, struct inode *dst_inode,
1068 block_t *blkaddr, int *do_replace,
1069 pgoff_t src, pgoff_t dst, pgoff_t len, bool full)
1070 {
1071 struct f2fs_sb_info *sbi = F2FS_I_SB(src_inode);
1072 pgoff_t i = 0;
1073 int ret;
1074
1075 while (i < len) {
1076 if (blkaddr[i] == NULL_ADDR && !full) {
1077 i++;
1078 continue;
1079 }
1080
1081 if (do_replace[i] || blkaddr[i] == NULL_ADDR) {
1082 struct dnode_of_data dn;
1083 struct node_info ni;
1084 size_t new_size;
1085 pgoff_t ilen;
1086
1087 set_new_dnode(&dn, dst_inode, NULL, NULL, 0);
1088 ret = f2fs_get_dnode_of_data(&dn, dst + i, ALLOC_NODE);
1089 if (ret)
1090 return ret;
1091
1092 ret = f2fs_get_node_info(sbi, dn.nid, &ni);
1093 if (ret) {
1094 f2fs_put_dnode(&dn);
1095 return ret;
1096 }
1097
1098 ilen = min((pgoff_t)
1099 ADDRS_PER_PAGE(dn.node_page, dst_inode) -
1100 dn.ofs_in_node, len - i);
1101 do {
1102 dn.data_blkaddr = datablock_addr(dn.inode,
1103 dn.node_page, dn.ofs_in_node);
1104 f2fs_truncate_data_blocks_range(&dn, 1);
1105
1106 if (do_replace[i]) {
1107 f2fs_i_blocks_write(src_inode,
1108 1, false, false);
1109 f2fs_i_blocks_write(dst_inode,
1110 1, true, false);
1111 f2fs_replace_block(sbi, &dn, dn.data_blkaddr,
1112 blkaddr[i], ni.version, true, false);
1113
1114 do_replace[i] = 0;
1115 }
1116 dn.ofs_in_node++;
1117 i++;
1118 new_size = (dst + i) << PAGE_SHIFT;
1119 if (dst_inode->i_size < new_size)
1120 f2fs_i_size_write(dst_inode, new_size);
1121 } while (--ilen && (do_replace[i] || blkaddr[i] == NULL_ADDR));
1122
1123 f2fs_put_dnode(&dn);
1124 } else {
1125 struct page *psrc, *pdst;
1126
1127 psrc = f2fs_get_lock_data_page(src_inode,
1128 src + i, true);
1129 if (IS_ERR(psrc))
1130 return PTR_ERR(psrc);
1131 pdst = f2fs_get_new_data_page(dst_inode, NULL, dst + i,
1132 true);
1133 if (IS_ERR(pdst)) {
1134 f2fs_put_page(psrc, 1);
1135 return PTR_ERR(pdst);
1136 }
1137 f2fs_copy_page(psrc, pdst);
1138 set_page_dirty(pdst);
1139 f2fs_put_page(pdst, 1);
1140 f2fs_put_page(psrc, 1);
1141
1142 ret = f2fs_truncate_hole(src_inode,
1143 src + i, src + i + 1);
1144 if (ret)
1145 return ret;
1146 i++;
1147 }
1148 }
1149 return 0;
1150 }
1151
1152 static int __exchange_data_block(struct inode *src_inode,
1153 struct inode *dst_inode, pgoff_t src, pgoff_t dst,
1154 pgoff_t len, bool full)
1155 {
1156 block_t *src_blkaddr;
1157 int *do_replace;
1158 pgoff_t olen;
1159 int ret;
1160
1161 while (len) {
1162 olen = min((pgoff_t)4 * ADDRS_PER_BLOCK, len);
1163
1164 src_blkaddr = f2fs_kvzalloc(F2FS_I_SB(src_inode),
1165 array_size(olen, sizeof(block_t)),
1166 GFP_KERNEL);
1167 if (!src_blkaddr)
1168 return -ENOMEM;
1169
1170 do_replace = f2fs_kvzalloc(F2FS_I_SB(src_inode),
1171 array_size(olen, sizeof(int)),
1172 GFP_KERNEL);
1173 if (!do_replace) {
1174 kvfree(src_blkaddr);
1175 return -ENOMEM;
1176 }
1177
1178 ret = __read_out_blkaddrs(src_inode, src_blkaddr,
1179 do_replace, src, olen);
1180 if (ret)
1181 goto roll_back;
1182
1183 ret = __clone_blkaddrs(src_inode, dst_inode, src_blkaddr,
1184 do_replace, src, dst, olen, full);
1185 if (ret)
1186 goto roll_back;
1187
1188 src += olen;
1189 dst += olen;
1190 len -= olen;
1191
1192 kvfree(src_blkaddr);
1193 kvfree(do_replace);
1194 }
1195 return 0;
1196
1197 roll_back:
1198 __roll_back_blkaddrs(src_inode, src_blkaddr, do_replace, src, olen);
1199 kvfree(src_blkaddr);
1200 kvfree(do_replace);
1201 return ret;
1202 }
1203
1204 static int f2fs_do_collapse(struct inode *inode, loff_t offset, loff_t len)
1205 {
1206 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1207 pgoff_t nrpages = (i_size_read(inode) + PAGE_SIZE - 1) / PAGE_SIZE;
1208 pgoff_t start = offset >> PAGE_SHIFT;
1209 pgoff_t end = (offset + len) >> PAGE_SHIFT;
1210 int ret;
1211
1212 f2fs_balance_fs(sbi, true);
1213
1214 /* avoid gc operation during block exchange */
1215 down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
1216 down_write(&F2FS_I(inode)->i_mmap_sem);
1217
1218 f2fs_lock_op(sbi);
1219 f2fs_drop_extent_tree(inode);
1220 truncate_pagecache(inode, offset);
1221 ret = __exchange_data_block(inode, inode, end, start, nrpages - end, true);
1222 f2fs_unlock_op(sbi);
1223
1224 up_write(&F2FS_I(inode)->i_mmap_sem);
1225 up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
1226 return ret;
1227 }
1228
1229 static int f2fs_collapse_range(struct inode *inode, loff_t offset, loff_t len)
1230 {
1231 loff_t new_size;
1232 int ret;
1233
1234 if (offset + len >= i_size_read(inode))
1235 return -EINVAL;
1236
1237 /* collapse range should be aligned to block size of f2fs. */
1238 if (offset & (F2FS_BLKSIZE - 1) || len & (F2FS_BLKSIZE - 1))
1239 return -EINVAL;
1240
1241 ret = f2fs_convert_inline_inode(inode);
1242 if (ret)
1243 return ret;
1244
1245 /* write out all dirty pages from offset */
1246 ret = filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX);
1247 if (ret)
1248 return ret;
1249
1250 ret = f2fs_do_collapse(inode, offset, len);
1251 if (ret)
1252 return ret;
1253
1254 /* write out all moved pages, if possible */
1255 down_write(&F2FS_I(inode)->i_mmap_sem);
1256 filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX);
1257 truncate_pagecache(inode, offset);
1258
1259 new_size = i_size_read(inode) - len;
1260 truncate_pagecache(inode, new_size);
1261
1262 ret = f2fs_truncate_blocks(inode, new_size, true, false);
1263 up_write(&F2FS_I(inode)->i_mmap_sem);
1264 if (!ret)
1265 f2fs_i_size_write(inode, new_size);
1266 return ret;
1267 }
1268
1269 static int f2fs_do_zero_range(struct dnode_of_data *dn, pgoff_t start,
1270 pgoff_t end)
1271 {
1272 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
1273 pgoff_t index = start;
1274 unsigned int ofs_in_node = dn->ofs_in_node;
1275 blkcnt_t count = 0;
1276 int ret;
1277
1278 for (; index < end; index++, dn->ofs_in_node++) {
1279 if (datablock_addr(dn->inode, dn->node_page,
1280 dn->ofs_in_node) == NULL_ADDR)
1281 count++;
1282 }
1283
1284 dn->ofs_in_node = ofs_in_node;
1285 ret = f2fs_reserve_new_blocks(dn, count);
1286 if (ret)
1287 return ret;
1288
1289 dn->ofs_in_node = ofs_in_node;
1290 for (index = start; index < end; index++, dn->ofs_in_node++) {
1291 dn->data_blkaddr = datablock_addr(dn->inode,
1292 dn->node_page, dn->ofs_in_node);
1293 /*
1294 * f2fs_reserve_new_blocks will not guarantee entire block
1295 * allocation.
1296 */
1297 if (dn->data_blkaddr == NULL_ADDR) {
1298 ret = -ENOSPC;
1299 break;
1300 }
1301 if (dn->data_blkaddr != NEW_ADDR) {
1302 f2fs_invalidate_blocks(sbi, dn->data_blkaddr);
1303 dn->data_blkaddr = NEW_ADDR;
1304 f2fs_set_data_blkaddr(dn);
1305 }
1306 }
1307
1308 f2fs_update_extent_cache_range(dn, start, 0, index - start);
1309
1310 return ret;
1311 }
1312
1313 static int f2fs_zero_range(struct inode *inode, loff_t offset, loff_t len,
1314 int mode)
1315 {
1316 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1317 struct address_space *mapping = inode->i_mapping;
1318 pgoff_t index, pg_start, pg_end;
1319 loff_t new_size = i_size_read(inode);
1320 loff_t off_start, off_end;
1321 int ret = 0;
1322
1323 ret = inode_newsize_ok(inode, (len + offset));
1324 if (ret)
1325 return ret;
1326
1327 ret = f2fs_convert_inline_inode(inode);
1328 if (ret)
1329 return ret;
1330
1331 ret = filemap_write_and_wait_range(mapping, offset, offset + len - 1);
1332 if (ret)
1333 return ret;
1334
1335 pg_start = ((unsigned long long) offset) >> PAGE_SHIFT;
1336 pg_end = ((unsigned long long) offset + len) >> PAGE_SHIFT;
1337
1338 off_start = offset & (PAGE_SIZE - 1);
1339 off_end = (offset + len) & (PAGE_SIZE - 1);
1340
1341 if (pg_start == pg_end) {
1342 ret = fill_zero(inode, pg_start, off_start,
1343 off_end - off_start);
1344 if (ret)
1345 return ret;
1346
1347 new_size = max_t(loff_t, new_size, offset + len);
1348 } else {
1349 if (off_start) {
1350 ret = fill_zero(inode, pg_start++, off_start,
1351 PAGE_SIZE - off_start);
1352 if (ret)
1353 return ret;
1354
1355 new_size = max_t(loff_t, new_size,
1356 (loff_t)pg_start << PAGE_SHIFT);
1357 }
1358
1359 for (index = pg_start; index < pg_end;) {
1360 struct dnode_of_data dn;
1361 unsigned int end_offset;
1362 pgoff_t end;
1363
1364 down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
1365 down_write(&F2FS_I(inode)->i_mmap_sem);
1366
1367 truncate_pagecache_range(inode,
1368 (loff_t)index << PAGE_SHIFT,
1369 ((loff_t)pg_end << PAGE_SHIFT) - 1);
1370
1371 f2fs_lock_op(sbi);
1372
1373 set_new_dnode(&dn, inode, NULL, NULL, 0);
1374 ret = f2fs_get_dnode_of_data(&dn, index, ALLOC_NODE);
1375 if (ret) {
1376 f2fs_unlock_op(sbi);
1377 up_write(&F2FS_I(inode)->i_mmap_sem);
1378 up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
1379 goto out;
1380 }
1381
1382 end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
1383 end = min(pg_end, end_offset - dn.ofs_in_node + index);
1384
1385 ret = f2fs_do_zero_range(&dn, index, end);
1386 f2fs_put_dnode(&dn);
1387
1388 f2fs_unlock_op(sbi);
1389 up_write(&F2FS_I(inode)->i_mmap_sem);
1390 up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
1391
1392 f2fs_balance_fs(sbi, dn.node_changed);
1393
1394 if (ret)
1395 goto out;
1396
1397 index = end;
1398 new_size = max_t(loff_t, new_size,
1399 (loff_t)index << PAGE_SHIFT);
1400 }
1401
1402 if (off_end) {
1403 ret = fill_zero(inode, pg_end, 0, off_end);
1404 if (ret)
1405 goto out;
1406
1407 new_size = max_t(loff_t, new_size, offset + len);
1408 }
1409 }
1410
1411 out:
1412 if (new_size > i_size_read(inode)) {
1413 if (mode & FALLOC_FL_KEEP_SIZE)
1414 file_set_keep_isize(inode);
1415 else
1416 f2fs_i_size_write(inode, new_size);
1417 }
1418 return ret;
1419 }
1420
1421 static int f2fs_insert_range(struct inode *inode, loff_t offset, loff_t len)
1422 {
1423 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1424 pgoff_t nr, pg_start, pg_end, delta, idx;
1425 loff_t new_size;
1426 int ret = 0;
1427
1428 new_size = i_size_read(inode) + len;
1429 ret = inode_newsize_ok(inode, new_size);
1430 if (ret)
1431 return ret;
1432
1433 if (offset >= i_size_read(inode))
1434 return -EINVAL;
1435
1436 /* insert range should be aligned to block size of f2fs. */
1437 if (offset & (F2FS_BLKSIZE - 1) || len & (F2FS_BLKSIZE - 1))
1438 return -EINVAL;
1439
1440 ret = f2fs_convert_inline_inode(inode);
1441 if (ret)
1442 return ret;
1443
1444 f2fs_balance_fs(sbi, true);
1445
1446 down_write(&F2FS_I(inode)->i_mmap_sem);
1447 ret = f2fs_truncate_blocks(inode, i_size_read(inode), true, false);
1448 up_write(&F2FS_I(inode)->i_mmap_sem);
1449 if (ret)
1450 return ret;
1451
1452 /* write out all dirty pages from offset */
1453 ret = filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX);
1454 if (ret)
1455 return ret;
1456
1457 pg_start = offset >> PAGE_SHIFT;
1458 pg_end = (offset + len) >> PAGE_SHIFT;
1459 delta = pg_end - pg_start;
1460 idx = (i_size_read(inode) + PAGE_SIZE - 1) / PAGE_SIZE;
1461
1462 /* avoid gc operation during block exchange */
1463 down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
1464 down_write(&F2FS_I(inode)->i_mmap_sem);
1465 truncate_pagecache(inode, offset);
1466
1467 while (!ret && idx > pg_start) {
1468 nr = idx - pg_start;
1469 if (nr > delta)
1470 nr = delta;
1471 idx -= nr;
1472
1473 f2fs_lock_op(sbi);
1474 f2fs_drop_extent_tree(inode);
1475
1476 ret = __exchange_data_block(inode, inode, idx,
1477 idx + delta, nr, false);
1478 f2fs_unlock_op(sbi);
1479 }
1480 up_write(&F2FS_I(inode)->i_mmap_sem);
1481 up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
1482
1483 /* write out all moved pages, if possible */
1484 down_write(&F2FS_I(inode)->i_mmap_sem);
1485 filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX);
1486 truncate_pagecache(inode, offset);
1487 up_write(&F2FS_I(inode)->i_mmap_sem);
1488
1489 if (!ret)
1490 f2fs_i_size_write(inode, new_size);
1491 return ret;
1492 }
1493
1494 static int expand_inode_data(struct inode *inode, loff_t offset,
1495 loff_t len, int mode)
1496 {
1497 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1498 struct f2fs_map_blocks map = { .m_next_pgofs = NULL,
1499 .m_next_extent = NULL, .m_seg_type = NO_CHECK_TYPE };
1500 pgoff_t pg_end;
1501 loff_t new_size = i_size_read(inode);
1502 loff_t off_end;
1503 int err;
1504
1505 err = inode_newsize_ok(inode, (len + offset));
1506 if (err)
1507 return err;
1508
1509 err = f2fs_convert_inline_inode(inode);
1510 if (err)
1511 return err;
1512
1513 f2fs_balance_fs(sbi, true);
1514
1515 pg_end = ((unsigned long long)offset + len) >> PAGE_SHIFT;
1516 off_end = (offset + len) & (PAGE_SIZE - 1);
1517
1518 map.m_lblk = ((unsigned long long)offset) >> PAGE_SHIFT;
1519 map.m_len = pg_end - map.m_lblk;
1520 if (off_end)
1521 map.m_len++;
1522
1523 err = f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_PRE_AIO);
1524 if (err) {
1525 pgoff_t last_off;
1526
1527 if (!map.m_len)
1528 return err;
1529
1530 last_off = map.m_lblk + map.m_len - 1;
1531
1532 /* update new size to the failed position */
1533 new_size = (last_off == pg_end) ? offset + len :
1534 (loff_t)(last_off + 1) << PAGE_SHIFT;
1535 } else {
1536 new_size = ((loff_t)pg_end << PAGE_SHIFT) + off_end;
1537 }
1538
1539 if (new_size > i_size_read(inode)) {
1540 if (mode & FALLOC_FL_KEEP_SIZE)
1541 file_set_keep_isize(inode);
1542 else
1543 f2fs_i_size_write(inode, new_size);
1544 }
1545
1546 return err;
1547 }
1548
1549 static long f2fs_fallocate(struct file *file, int mode,
1550 loff_t offset, loff_t len)
1551 {
1552 struct inode *inode = file_inode(file);
1553 long ret = 0;
1554
1555 if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
1556 return -EIO;
1557
1558 /* f2fs only support ->fallocate for regular file */
1559 if (!S_ISREG(inode->i_mode))
1560 return -EINVAL;
1561
1562 if (f2fs_encrypted_inode(inode) &&
1563 (mode & (FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_INSERT_RANGE)))
1564 return -EOPNOTSUPP;
1565
1566 if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE |
1567 FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_ZERO_RANGE |
1568 FALLOC_FL_INSERT_RANGE))
1569 return -EOPNOTSUPP;
1570
1571 inode_lock(inode);
1572
1573 if (mode & FALLOC_FL_PUNCH_HOLE) {
1574 if (offset >= inode->i_size)
1575 goto out;
1576
1577 ret = punch_hole(inode, offset, len);
1578 } else if (mode & FALLOC_FL_COLLAPSE_RANGE) {
1579 ret = f2fs_collapse_range(inode, offset, len);
1580 } else if (mode & FALLOC_FL_ZERO_RANGE) {
1581 ret = f2fs_zero_range(inode, offset, len, mode);
1582 } else if (mode & FALLOC_FL_INSERT_RANGE) {
1583 ret = f2fs_insert_range(inode, offset, len);
1584 } else {
1585 ret = expand_inode_data(inode, offset, len, mode);
1586 }
1587
1588 if (!ret) {
1589 inode->i_mtime = inode->i_ctime = current_time(inode);
1590 f2fs_mark_inode_dirty_sync(inode, false);
1591 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
1592 }
1593
1594 out:
1595 inode_unlock(inode);
1596
1597 trace_f2fs_fallocate(inode, mode, offset, len, ret);
1598 return ret;
1599 }
1600
1601 static int f2fs_release_file(struct inode *inode, struct file *filp)
1602 {
1603 /*
1604 * f2fs_relase_file is called at every close calls. So we should
1605 * not drop any inmemory pages by close called by other process.
1606 */
1607 if (!(filp->f_mode & FMODE_WRITE) ||
1608 atomic_read(&inode->i_writecount) != 1)
1609 return 0;
1610
1611 /* some remained atomic pages should discarded */
1612 if (f2fs_is_atomic_file(inode))
1613 f2fs_drop_inmem_pages(inode);
1614 if (f2fs_is_volatile_file(inode)) {
1615 set_inode_flag(inode, FI_DROP_CACHE);
1616 filemap_fdatawrite(inode->i_mapping);
1617 clear_inode_flag(inode, FI_DROP_CACHE);
1618 clear_inode_flag(inode, FI_VOLATILE_FILE);
1619 stat_dec_volatile_write(inode);
1620 }
1621 return 0;
1622 }
1623
1624 static int f2fs_file_flush(struct file *file, fl_owner_t id)
1625 {
1626 struct inode *inode = file_inode(file);
1627
1628 /*
1629 * If the process doing a transaction is crashed, we should do
1630 * roll-back. Otherwise, other reader/write can see corrupted database
1631 * until all the writers close its file. Since this should be done
1632 * before dropping file lock, it needs to do in ->flush.
1633 */
1634 if (f2fs_is_atomic_file(inode) &&
1635 F2FS_I(inode)->inmem_task == current)
1636 f2fs_drop_inmem_pages(inode);
1637 return 0;
1638 }
1639
1640 static int f2fs_ioc_getflags(struct file *filp, unsigned long arg)
1641 {
1642 struct inode *inode = file_inode(filp);
1643 struct f2fs_inode_info *fi = F2FS_I(inode);
1644 unsigned int flags = fi->i_flags;
1645
1646 if (f2fs_encrypted_inode(inode))
1647 flags |= F2FS_ENCRYPT_FL;
1648 if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode))
1649 flags |= F2FS_INLINE_DATA_FL;
1650
1651 flags &= F2FS_FL_USER_VISIBLE;
1652
1653 return put_user(flags, (int __user *)arg);
1654 }
1655
1656 static int __f2fs_ioc_setflags(struct inode *inode, unsigned int flags)
1657 {
1658 struct f2fs_inode_info *fi = F2FS_I(inode);
1659 unsigned int oldflags;
1660
1661 /* Is it quota file? Do not allow user to mess with it */
1662 if (IS_NOQUOTA(inode))
1663 return -EPERM;
1664
1665 flags = f2fs_mask_flags(inode->i_mode, flags);
1666
1667 oldflags = fi->i_flags;
1668
1669 if ((flags ^ oldflags) & (F2FS_APPEND_FL | F2FS_IMMUTABLE_FL))
1670 if (!capable(CAP_LINUX_IMMUTABLE))
1671 return -EPERM;
1672
1673 flags = flags & F2FS_FL_USER_MODIFIABLE;
1674 flags |= oldflags & ~F2FS_FL_USER_MODIFIABLE;
1675 fi->i_flags = flags;
1676
1677 if (fi->i_flags & F2FS_PROJINHERIT_FL)
1678 set_inode_flag(inode, FI_PROJ_INHERIT);
1679 else
1680 clear_inode_flag(inode, FI_PROJ_INHERIT);
1681
1682 inode->i_ctime = current_time(inode);
1683 f2fs_set_inode_flags(inode);
1684 f2fs_mark_inode_dirty_sync(inode, false);
1685 return 0;
1686 }
1687
1688 static int f2fs_ioc_setflags(struct file *filp, unsigned long arg)
1689 {
1690 struct inode *inode = file_inode(filp);
1691 unsigned int flags;
1692 int ret;
1693
1694 if (!inode_owner_or_capable(inode))
1695 return -EACCES;
1696
1697 if (get_user(flags, (int __user *)arg))
1698 return -EFAULT;
1699
1700 ret = mnt_want_write_file(filp);
1701 if (ret)
1702 return ret;
1703
1704 inode_lock(inode);
1705
1706 ret = __f2fs_ioc_setflags(inode, flags);
1707
1708 inode_unlock(inode);
1709 mnt_drop_write_file(filp);
1710 return ret;
1711 }
1712
1713 static int f2fs_ioc_getversion(struct file *filp, unsigned long arg)
1714 {
1715 struct inode *inode = file_inode(filp);
1716
1717 return put_user(inode->i_generation, (int __user *)arg);
1718 }
1719
1720 static int f2fs_ioc_start_atomic_write(struct file *filp)
1721 {
1722 struct inode *inode = file_inode(filp);
1723 int ret;
1724
1725 if (!inode_owner_or_capable(inode))
1726 return -EACCES;
1727
1728 if (!S_ISREG(inode->i_mode))
1729 return -EINVAL;
1730
1731 ret = mnt_want_write_file(filp);
1732 if (ret)
1733 return ret;
1734
1735 inode_lock(inode);
1736
1737 if (f2fs_is_atomic_file(inode)) {
1738 if (is_inode_flag_set(inode, FI_ATOMIC_REVOKE_REQUEST))
1739 ret = -EINVAL;
1740 goto out;
1741 }
1742
1743 ret = f2fs_convert_inline_inode(inode);
1744 if (ret)
1745 goto out;
1746
1747 down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
1748
1749 if (!get_dirty_pages(inode))
1750 goto skip_flush;
1751
1752 f2fs_msg(F2FS_I_SB(inode)->sb, KERN_WARNING,
1753 "Unexpected flush for atomic writes: ino=%lu, npages=%u",
1754 inode->i_ino, get_dirty_pages(inode));
1755 ret = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX);
1756 if (ret) {
1757 up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
1758 goto out;
1759 }
1760 skip_flush:
1761 set_inode_flag(inode, FI_ATOMIC_FILE);
1762 clear_inode_flag(inode, FI_ATOMIC_REVOKE_REQUEST);
1763 up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
1764
1765 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
1766 F2FS_I(inode)->inmem_task = current;
1767 stat_inc_atomic_write(inode);
1768 stat_update_max_atomic_write(inode);
1769 out:
1770 inode_unlock(inode);
1771 mnt_drop_write_file(filp);
1772 return ret;
1773 }
1774
1775 static int f2fs_ioc_commit_atomic_write(struct file *filp)
1776 {
1777 struct inode *inode = file_inode(filp);
1778 int ret;
1779
1780 if (!inode_owner_or_capable(inode))
1781 return -EACCES;
1782
1783 ret = mnt_want_write_file(filp);
1784 if (ret)
1785 return ret;
1786
1787 f2fs_balance_fs(F2FS_I_SB(inode), true);
1788
1789 inode_lock(inode);
1790
1791 if (f2fs_is_volatile_file(inode)) {
1792 ret = -EINVAL;
1793 goto err_out;
1794 }
1795
1796 if (f2fs_is_atomic_file(inode)) {
1797 ret = f2fs_commit_inmem_pages(inode);
1798 if (ret)
1799 goto err_out;
1800
1801 ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 0, true);
1802 if (!ret) {
1803 clear_inode_flag(inode, FI_ATOMIC_FILE);
1804 F2FS_I(inode)->i_gc_failures[GC_FAILURE_ATOMIC] = 0;
1805 stat_dec_atomic_write(inode);
1806 }
1807 } else {
1808 ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 1, false);
1809 }
1810 err_out:
1811 if (is_inode_flag_set(inode, FI_ATOMIC_REVOKE_REQUEST)) {
1812 clear_inode_flag(inode, FI_ATOMIC_REVOKE_REQUEST);
1813 ret = -EINVAL;
1814 }
1815 inode_unlock(inode);
1816 mnt_drop_write_file(filp);
1817 return ret;
1818 }
1819
1820 static int f2fs_ioc_start_volatile_write(struct file *filp)
1821 {
1822 struct inode *inode = file_inode(filp);
1823 int ret;
1824
1825 if (!inode_owner_or_capable(inode))
1826 return -EACCES;
1827
1828 if (!S_ISREG(inode->i_mode))
1829 return -EINVAL;
1830
1831 ret = mnt_want_write_file(filp);
1832 if (ret)
1833 return ret;
1834
1835 inode_lock(inode);
1836
1837 if (f2fs_is_volatile_file(inode))
1838 goto out;
1839
1840 ret = f2fs_convert_inline_inode(inode);
1841 if (ret)
1842 goto out;
1843
1844 stat_inc_volatile_write(inode);
1845 stat_update_max_volatile_write(inode);
1846
1847 set_inode_flag(inode, FI_VOLATILE_FILE);
1848 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
1849 out:
1850 inode_unlock(inode);
1851 mnt_drop_write_file(filp);
1852 return ret;
1853 }
1854
1855 static int f2fs_ioc_release_volatile_write(struct file *filp)
1856 {
1857 struct inode *inode = file_inode(filp);
1858 int ret;
1859
1860 if (!inode_owner_or_capable(inode))
1861 return -EACCES;
1862
1863 ret = mnt_want_write_file(filp);
1864 if (ret)
1865 return ret;
1866
1867 inode_lock(inode);
1868
1869 if (!f2fs_is_volatile_file(inode))
1870 goto out;
1871
1872 if (!f2fs_is_first_block_written(inode)) {
1873 ret = truncate_partial_data_page(inode, 0, true);
1874 goto out;
1875 }
1876
1877 ret = punch_hole(inode, 0, F2FS_BLKSIZE);
1878 out:
1879 inode_unlock(inode);
1880 mnt_drop_write_file(filp);
1881 return ret;
1882 }
1883
1884 static int f2fs_ioc_abort_volatile_write(struct file *filp)
1885 {
1886 struct inode *inode = file_inode(filp);
1887 int ret;
1888
1889 if (!inode_owner_or_capable(inode))
1890 return -EACCES;
1891
1892 ret = mnt_want_write_file(filp);
1893 if (ret)
1894 return ret;
1895
1896 inode_lock(inode);
1897
1898 if (f2fs_is_atomic_file(inode))
1899 f2fs_drop_inmem_pages(inode);
1900 if (f2fs_is_volatile_file(inode)) {
1901 clear_inode_flag(inode, FI_VOLATILE_FILE);
1902 stat_dec_volatile_write(inode);
1903 ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 0, true);
1904 }
1905
1906 clear_inode_flag(inode, FI_ATOMIC_REVOKE_REQUEST);
1907
1908 inode_unlock(inode);
1909
1910 mnt_drop_write_file(filp);
1911 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
1912 return ret;
1913 }
1914
1915 static int f2fs_ioc_shutdown(struct file *filp, unsigned long arg)
1916 {
1917 struct inode *inode = file_inode(filp);
1918 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1919 struct super_block *sb = sbi->sb;
1920 __u32 in;
1921 int ret = 0;
1922
1923 if (!capable(CAP_SYS_ADMIN))
1924 return -EPERM;
1925
1926 if (get_user(in, (__u32 __user *)arg))
1927 return -EFAULT;
1928
1929 if (in != F2FS_GOING_DOWN_FULLSYNC) {
1930 ret = mnt_want_write_file(filp);
1931 if (ret)
1932 return ret;
1933 }
1934
1935 switch (in) {
1936 case F2FS_GOING_DOWN_FULLSYNC:
1937 sb = freeze_bdev(sb->s_bdev);
1938 if (IS_ERR(sb)) {
1939 ret = PTR_ERR(sb);
1940 goto out;
1941 }
1942 if (sb) {
1943 f2fs_stop_checkpoint(sbi, false);
1944 set_sbi_flag(sbi, SBI_IS_SHUTDOWN);
1945 thaw_bdev(sb->s_bdev, sb);
1946 }
1947 break;
1948 case F2FS_GOING_DOWN_METASYNC:
1949 /* do checkpoint only */
1950 ret = f2fs_sync_fs(sb, 1);
1951 if (ret)
1952 goto out;
1953 f2fs_stop_checkpoint(sbi, false);
1954 set_sbi_flag(sbi, SBI_IS_SHUTDOWN);
1955 break;
1956 case F2FS_GOING_DOWN_NOSYNC:
1957 f2fs_stop_checkpoint(sbi, false);
1958 set_sbi_flag(sbi, SBI_IS_SHUTDOWN);
1959 break;
1960 case F2FS_GOING_DOWN_METAFLUSH:
1961 f2fs_sync_meta_pages(sbi, META, LONG_MAX, FS_META_IO);
1962 f2fs_stop_checkpoint(sbi, false);
1963 set_sbi_flag(sbi, SBI_IS_SHUTDOWN);
1964 break;
1965 default:
1966 ret = -EINVAL;
1967 goto out;
1968 }
1969
1970 f2fs_stop_gc_thread(sbi);
1971 f2fs_stop_discard_thread(sbi);
1972
1973 f2fs_drop_discard_cmd(sbi);
1974 clear_opt(sbi, DISCARD);
1975
1976 f2fs_update_time(sbi, REQ_TIME);
1977 out:
1978 if (in != F2FS_GOING_DOWN_FULLSYNC)
1979 mnt_drop_write_file(filp);
1980 return ret;
1981 }
1982
1983 static int f2fs_ioc_fitrim(struct file *filp, unsigned long arg)
1984 {
1985 struct inode *inode = file_inode(filp);
1986 struct super_block *sb = inode->i_sb;
1987 struct request_queue *q = bdev_get_queue(sb->s_bdev);
1988 struct fstrim_range range;
1989 int ret;
1990
1991 if (!capable(CAP_SYS_ADMIN))
1992 return -EPERM;
1993
1994 if (!f2fs_hw_support_discard(F2FS_SB(sb)))
1995 return -EOPNOTSUPP;
1996
1997 if (copy_from_user(&range, (struct fstrim_range __user *)arg,
1998 sizeof(range)))
1999 return -EFAULT;
2000
2001 ret = mnt_want_write_file(filp);
2002 if (ret)
2003 return ret;
2004
2005 range.minlen = max((unsigned int)range.minlen,
2006 q->limits.discard_granularity);
2007 ret = f2fs_trim_fs(F2FS_SB(sb), &range);
2008 mnt_drop_write_file(filp);
2009 if (ret < 0)
2010 return ret;
2011
2012 if (copy_to_user((struct fstrim_range __user *)arg, &range,
2013 sizeof(range)))
2014 return -EFAULT;
2015 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
2016 return 0;
2017 }
2018
2019 static bool uuid_is_nonzero(__u8 u[16])
2020 {
2021 int i;
2022
2023 for (i = 0; i < 16; i++)
2024 if (u[i])
2025 return true;
2026 return false;
2027 }
2028
2029 static int f2fs_ioc_set_encryption_policy(struct file *filp, unsigned long arg)
2030 {
2031 struct inode *inode = file_inode(filp);
2032
2033 if (!f2fs_sb_has_encrypt(inode->i_sb))
2034 return -EOPNOTSUPP;
2035
2036 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
2037
2038 return fscrypt_ioctl_set_policy(filp, (const void __user *)arg);
2039 }
2040
2041 static int f2fs_ioc_get_encryption_policy(struct file *filp, unsigned long arg)
2042 {
2043 if (!f2fs_sb_has_encrypt(file_inode(filp)->i_sb))
2044 return -EOPNOTSUPP;
2045 return fscrypt_ioctl_get_policy(filp, (void __user *)arg);
2046 }
2047
2048 static int f2fs_ioc_get_encryption_pwsalt(struct file *filp, unsigned long arg)
2049 {
2050 struct inode *inode = file_inode(filp);
2051 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2052 int err;
2053
2054 if (!f2fs_sb_has_encrypt(inode->i_sb))
2055 return -EOPNOTSUPP;
2056
2057 err = mnt_want_write_file(filp);
2058 if (err)
2059 return err;
2060
2061 down_write(&sbi->sb_lock);
2062
2063 if (uuid_is_nonzero(sbi->raw_super->encrypt_pw_salt))
2064 goto got_it;
2065
2066 /* update superblock with uuid */
2067 generate_random_uuid(sbi->raw_super->encrypt_pw_salt);
2068
2069 err = f2fs_commit_super(sbi, false);
2070 if (err) {
2071 /* undo new data */
2072 memset(sbi->raw_super->encrypt_pw_salt, 0, 16);
2073 goto out_err;
2074 }
2075 got_it:
2076 if (copy_to_user((__u8 __user *)arg, sbi->raw_super->encrypt_pw_salt,
2077 16))
2078 err = -EFAULT;
2079 out_err:
2080 up_write(&sbi->sb_lock);
2081 mnt_drop_write_file(filp);
2082 return err;
2083 }
2084
2085 static int f2fs_ioc_gc(struct file *filp, unsigned long arg)
2086 {
2087 struct inode *inode = file_inode(filp);
2088 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2089 __u32 sync;
2090 int ret;
2091
2092 if (!capable(CAP_SYS_ADMIN))
2093 return -EPERM;
2094
2095 if (get_user(sync, (__u32 __user *)arg))
2096 return -EFAULT;
2097
2098 if (f2fs_readonly(sbi->sb))
2099 return -EROFS;
2100
2101 ret = mnt_want_write_file(filp);
2102 if (ret)
2103 return ret;
2104
2105 if (!sync) {
2106 if (!mutex_trylock(&sbi->gc_mutex)) {
2107 ret = -EBUSY;
2108 goto out;
2109 }
2110 } else {
2111 mutex_lock(&sbi->gc_mutex);
2112 }
2113
2114 ret = f2fs_gc(sbi, sync, true, NULL_SEGNO);
2115 out:
2116 mnt_drop_write_file(filp);
2117 return ret;
2118 }
2119
2120 static int f2fs_ioc_gc_range(struct file *filp, unsigned long arg)
2121 {
2122 struct inode *inode = file_inode(filp);
2123 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2124 struct f2fs_gc_range range;
2125 u64 end;
2126 int ret;
2127
2128 if (!capable(CAP_SYS_ADMIN))
2129 return -EPERM;
2130
2131 if (copy_from_user(&range, (struct f2fs_gc_range __user *)arg,
2132 sizeof(range)))
2133 return -EFAULT;
2134
2135 if (f2fs_readonly(sbi->sb))
2136 return -EROFS;
2137
2138 end = range.start + range.len;
2139 if (range.start < MAIN_BLKADDR(sbi) || end >= MAX_BLKADDR(sbi)) {
2140 return -EINVAL;
2141 }
2142
2143 ret = mnt_want_write_file(filp);
2144 if (ret)
2145 return ret;
2146
2147 do_more:
2148 if (!range.sync) {
2149 if (!mutex_trylock(&sbi->gc_mutex)) {
2150 ret = -EBUSY;
2151 goto out;
2152 }
2153 } else {
2154 mutex_lock(&sbi->gc_mutex);
2155 }
2156
2157 ret = f2fs_gc(sbi, range.sync, true, GET_SEGNO(sbi, range.start));
2158 range.start += sbi->blocks_per_seg;
2159 if (range.start <= end)
2160 goto do_more;
2161 out:
2162 mnt_drop_write_file(filp);
2163 return ret;
2164 }
2165
2166 static int f2fs_ioc_write_checkpoint(struct file *filp, unsigned long arg)
2167 {
2168 struct inode *inode = file_inode(filp);
2169 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2170 int ret;
2171
2172 if (!capable(CAP_SYS_ADMIN))
2173 return -EPERM;
2174
2175 if (f2fs_readonly(sbi->sb))
2176 return -EROFS;
2177
2178 if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
2179 f2fs_msg(sbi->sb, KERN_INFO,
2180 "Skipping Checkpoint. Checkpoints currently disabled.");
2181 return -EINVAL;
2182 }
2183
2184 ret = mnt_want_write_file(filp);
2185 if (ret)
2186 return ret;
2187
2188 ret = f2fs_sync_fs(sbi->sb, 1);
2189
2190 mnt_drop_write_file(filp);
2191 return ret;
2192 }
2193
2194 static int f2fs_defragment_range(struct f2fs_sb_info *sbi,
2195 struct file *filp,
2196 struct f2fs_defragment *range)
2197 {
2198 struct inode *inode = file_inode(filp);
2199 struct f2fs_map_blocks map = { .m_next_extent = NULL,
2200 .m_seg_type = NO_CHECK_TYPE };
2201 struct extent_info ei = {0, 0, 0};
2202 pgoff_t pg_start, pg_end, next_pgofs;
2203 unsigned int blk_per_seg = sbi->blocks_per_seg;
2204 unsigned int total = 0, sec_num;
2205 block_t blk_end = 0;
2206 bool fragmented = false;
2207 int err;
2208
2209 /* if in-place-update policy is enabled, don't waste time here */
2210 if (f2fs_should_update_inplace(inode, NULL))
2211 return -EINVAL;
2212
2213 pg_start = range->start >> PAGE_SHIFT;
2214 pg_end = (range->start + range->len) >> PAGE_SHIFT;
2215
2216 f2fs_balance_fs(sbi, true);
2217
2218 inode_lock(inode);
2219
2220 /* writeback all dirty pages in the range */
2221 err = filemap_write_and_wait_range(inode->i_mapping, range->start,
2222 range->start + range->len - 1);
2223 if (err)
2224 goto out;
2225
2226 /*
2227 * lookup mapping info in extent cache, skip defragmenting if physical
2228 * block addresses are continuous.
2229 */
2230 if (f2fs_lookup_extent_cache(inode, pg_start, &ei)) {
2231 if (ei.fofs + ei.len >= pg_end)
2232 goto out;
2233 }
2234
2235 map.m_lblk = pg_start;
2236 map.m_next_pgofs = &next_pgofs;
2237
2238 /*
2239 * lookup mapping info in dnode page cache, skip defragmenting if all
2240 * physical block addresses are continuous even if there are hole(s)
2241 * in logical blocks.
2242 */
2243 while (map.m_lblk < pg_end) {
2244 map.m_len = pg_end - map.m_lblk;
2245 err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_DEFAULT);
2246 if (err)
2247 goto out;
2248
2249 if (!(map.m_flags & F2FS_MAP_FLAGS)) {
2250 map.m_lblk = next_pgofs;
2251 continue;
2252 }
2253
2254 if (blk_end && blk_end != map.m_pblk)
2255 fragmented = true;
2256
2257 /* record total count of block that we're going to move */
2258 total += map.m_len;
2259
2260 blk_end = map.m_pblk + map.m_len;
2261
2262 map.m_lblk += map.m_len;
2263 }
2264
2265 if (!fragmented)
2266 goto out;
2267
2268 sec_num = (total + BLKS_PER_SEC(sbi) - 1) / BLKS_PER_SEC(sbi);
2269
2270 /*
2271 * make sure there are enough free section for LFS allocation, this can
2272 * avoid defragment running in SSR mode when free section are allocated
2273 * intensively
2274 */
2275 if (has_not_enough_free_secs(sbi, 0, sec_num)) {
2276 err = -EAGAIN;
2277 goto out;
2278 }
2279
2280 map.m_lblk = pg_start;
2281 map.m_len = pg_end - pg_start;
2282 total = 0;
2283
2284 while (map.m_lblk < pg_end) {
2285 pgoff_t idx;
2286 int cnt = 0;
2287
2288 do_map:
2289 map.m_len = pg_end - map.m_lblk;
2290 err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_DEFAULT);
2291 if (err)
2292 goto clear_out;
2293
2294 if (!(map.m_flags & F2FS_MAP_FLAGS)) {
2295 map.m_lblk = next_pgofs;
2296 continue;
2297 }
2298
2299 set_inode_flag(inode, FI_DO_DEFRAG);
2300
2301 idx = map.m_lblk;
2302 while (idx < map.m_lblk + map.m_len && cnt < blk_per_seg) {
2303 struct page *page;
2304
2305 page = f2fs_get_lock_data_page(inode, idx, true);
2306 if (IS_ERR(page)) {
2307 err = PTR_ERR(page);
2308 goto clear_out;
2309 }
2310
2311 set_page_dirty(page);
2312 f2fs_put_page(page, 1);
2313
2314 idx++;
2315 cnt++;
2316 total++;
2317 }
2318
2319 map.m_lblk = idx;
2320
2321 if (idx < pg_end && cnt < blk_per_seg)
2322 goto do_map;
2323
2324 clear_inode_flag(inode, FI_DO_DEFRAG);
2325
2326 err = filemap_fdatawrite(inode->i_mapping);
2327 if (err)
2328 goto out;
2329 }
2330 clear_out:
2331 clear_inode_flag(inode, FI_DO_DEFRAG);
2332 out:
2333 inode_unlock(inode);
2334 if (!err)
2335 range->len = (u64)total << PAGE_SHIFT;
2336 return err;
2337 }
2338
2339 static int f2fs_ioc_defragment(struct file *filp, unsigned long arg)
2340 {
2341 struct inode *inode = file_inode(filp);
2342 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2343 struct f2fs_defragment range;
2344 int err;
2345
2346 if (!capable(CAP_SYS_ADMIN))
2347 return -EPERM;
2348
2349 if (!S_ISREG(inode->i_mode) || f2fs_is_atomic_file(inode))
2350 return -EINVAL;
2351
2352 if (f2fs_readonly(sbi->sb))
2353 return -EROFS;
2354
2355 if (copy_from_user(&range, (struct f2fs_defragment __user *)arg,
2356 sizeof(range)))
2357 return -EFAULT;
2358
2359 /* verify alignment of offset & size */
2360 if (range.start & (F2FS_BLKSIZE - 1) || range.len & (F2FS_BLKSIZE - 1))
2361 return -EINVAL;
2362
2363 if (unlikely((range.start + range.len) >> PAGE_SHIFT >
2364 sbi->max_file_blocks))
2365 return -EINVAL;
2366
2367 err = mnt_want_write_file(filp);
2368 if (err)
2369 return err;
2370
2371 err = f2fs_defragment_range(sbi, filp, &range);
2372 mnt_drop_write_file(filp);
2373
2374 f2fs_update_time(sbi, REQ_TIME);
2375 if (err < 0)
2376 return err;
2377
2378 if (copy_to_user((struct f2fs_defragment __user *)arg, &range,
2379 sizeof(range)))
2380 return -EFAULT;
2381
2382 return 0;
2383 }
2384
2385 static int f2fs_move_file_range(struct file *file_in, loff_t pos_in,
2386 struct file *file_out, loff_t pos_out, size_t len)
2387 {
2388 struct inode *src = file_inode(file_in);
2389 struct inode *dst = file_inode(file_out);
2390 struct f2fs_sb_info *sbi = F2FS_I_SB(src);
2391 size_t olen = len, dst_max_i_size = 0;
2392 size_t dst_osize;
2393 int ret;
2394
2395 if (file_in->f_path.mnt != file_out->f_path.mnt ||
2396 src->i_sb != dst->i_sb)
2397 return -EXDEV;
2398
2399 if (unlikely(f2fs_readonly(src->i_sb)))
2400 return -EROFS;
2401
2402 if (!S_ISREG(src->i_mode) || !S_ISREG(dst->i_mode))
2403 return -EINVAL;
2404
2405 if (f2fs_encrypted_inode(src) || f2fs_encrypted_inode(dst))
2406 return -EOPNOTSUPP;
2407
2408 if (src == dst) {
2409 if (pos_in == pos_out)
2410 return 0;
2411 if (pos_out > pos_in && pos_out < pos_in + len)
2412 return -EINVAL;
2413 }
2414
2415 inode_lock(src);
2416 if (src != dst) {
2417 ret = -EBUSY;
2418 if (!inode_trylock(dst))
2419 goto out;
2420 }
2421
2422 ret = -EINVAL;
2423 if (pos_in + len > src->i_size || pos_in + len < pos_in)
2424 goto out_unlock;
2425 if (len == 0)
2426 olen = len = src->i_size - pos_in;
2427 if (pos_in + len == src->i_size)
2428 len = ALIGN(src->i_size, F2FS_BLKSIZE) - pos_in;
2429 if (len == 0) {
2430 ret = 0;
2431 goto out_unlock;
2432 }
2433
2434 dst_osize = dst->i_size;
2435 if (pos_out + olen > dst->i_size)
2436 dst_max_i_size = pos_out + olen;
2437
2438 /* verify the end result is block aligned */
2439 if (!IS_ALIGNED(pos_in, F2FS_BLKSIZE) ||
2440 !IS_ALIGNED(pos_in + len, F2FS_BLKSIZE) ||
2441 !IS_ALIGNED(pos_out, F2FS_BLKSIZE))
2442 goto out_unlock;
2443
2444 ret = f2fs_convert_inline_inode(src);
2445 if (ret)
2446 goto out_unlock;
2447
2448 ret = f2fs_convert_inline_inode(dst);
2449 if (ret)
2450 goto out_unlock;
2451
2452 /* write out all dirty pages from offset */
2453 ret = filemap_write_and_wait_range(src->i_mapping,
2454 pos_in, pos_in + len);
2455 if (ret)
2456 goto out_unlock;
2457
2458 ret = filemap_write_and_wait_range(dst->i_mapping,
2459 pos_out, pos_out + len);
2460 if (ret)
2461 goto out_unlock;
2462
2463 f2fs_balance_fs(sbi, true);
2464
2465 down_write(&F2FS_I(src)->i_gc_rwsem[WRITE]);
2466 if (src != dst) {
2467 ret = -EBUSY;
2468 if (!down_write_trylock(&F2FS_I(dst)->i_gc_rwsem[WRITE]))
2469 goto out_src;
2470 }
2471
2472 f2fs_lock_op(sbi);
2473 ret = __exchange_data_block(src, dst, pos_in >> F2FS_BLKSIZE_BITS,
2474 pos_out >> F2FS_BLKSIZE_BITS,
2475 len >> F2FS_BLKSIZE_BITS, false);
2476
2477 if (!ret) {
2478 if (dst_max_i_size)
2479 f2fs_i_size_write(dst, dst_max_i_size);
2480 else if (dst_osize != dst->i_size)
2481 f2fs_i_size_write(dst, dst_osize);
2482 }
2483 f2fs_unlock_op(sbi);
2484
2485 if (src != dst)
2486 up_write(&F2FS_I(dst)->i_gc_rwsem[WRITE]);
2487 out_src:
2488 up_write(&F2FS_I(src)->i_gc_rwsem[WRITE]);
2489 out_unlock:
2490 if (src != dst)
2491 inode_unlock(dst);
2492 out:
2493 inode_unlock(src);
2494 return ret;
2495 }
2496
2497 static int f2fs_ioc_move_range(struct file *filp, unsigned long arg)
2498 {
2499 struct f2fs_move_range range;
2500 struct fd dst;
2501 int err;
2502
2503 if (!(filp->f_mode & FMODE_READ) ||
2504 !(filp->f_mode & FMODE_WRITE))
2505 return -EBADF;
2506
2507 if (copy_from_user(&range, (struct f2fs_move_range __user *)arg,
2508 sizeof(range)))
2509 return -EFAULT;
2510
2511 dst = fdget(range.dst_fd);
2512 if (!dst.file)
2513 return -EBADF;
2514
2515 if (!(dst.file->f_mode & FMODE_WRITE)) {
2516 err = -EBADF;
2517 goto err_out;
2518 }
2519
2520 err = mnt_want_write_file(filp);
2521 if (err)
2522 goto err_out;
2523
2524 err = f2fs_move_file_range(filp, range.pos_in, dst.file,
2525 range.pos_out, range.len);
2526
2527 mnt_drop_write_file(filp);
2528 if (err)
2529 goto err_out;
2530
2531 if (copy_to_user((struct f2fs_move_range __user *)arg,
2532 &range, sizeof(range)))
2533 err = -EFAULT;
2534 err_out:
2535 fdput(dst);
2536 return err;
2537 }
2538
2539 static int f2fs_ioc_flush_device(struct file *filp, unsigned long arg)
2540 {
2541 struct inode *inode = file_inode(filp);
2542 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2543 struct sit_info *sm = SIT_I(sbi);
2544 unsigned int start_segno = 0, end_segno = 0;
2545 unsigned int dev_start_segno = 0, dev_end_segno = 0;
2546 struct f2fs_flush_device range;
2547 int ret;
2548
2549 if (!capable(CAP_SYS_ADMIN))
2550 return -EPERM;
2551
2552 if (f2fs_readonly(sbi->sb))
2553 return -EROFS;
2554
2555 if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
2556 return -EINVAL;
2557
2558 if (copy_from_user(&range, (struct f2fs_flush_device __user *)arg,
2559 sizeof(range)))
2560 return -EFAULT;
2561
2562 if (sbi->s_ndevs <= 1 || sbi->s_ndevs - 1 <= range.dev_num ||
2563 sbi->segs_per_sec != 1) {
2564 f2fs_msg(sbi->sb, KERN_WARNING,
2565 "Can't flush %u in %d for segs_per_sec %u != 1\n",
2566 range.dev_num, sbi->s_ndevs,
2567 sbi->segs_per_sec);
2568 return -EINVAL;
2569 }
2570
2571 ret = mnt_want_write_file(filp);
2572 if (ret)
2573 return ret;
2574
2575 if (range.dev_num != 0)
2576 dev_start_segno = GET_SEGNO(sbi, FDEV(range.dev_num).start_blk);
2577 dev_end_segno = GET_SEGNO(sbi, FDEV(range.dev_num).end_blk);
2578
2579 start_segno = sm->last_victim[FLUSH_DEVICE];
2580 if (start_segno < dev_start_segno || start_segno >= dev_end_segno)
2581 start_segno = dev_start_segno;
2582 end_segno = min(start_segno + range.segments, dev_end_segno);
2583
2584 while (start_segno < end_segno) {
2585 if (!mutex_trylock(&sbi->gc_mutex)) {
2586 ret = -EBUSY;
2587 goto out;
2588 }
2589 sm->last_victim[GC_CB] = end_segno + 1;
2590 sm->last_victim[GC_GREEDY] = end_segno + 1;
2591 sm->last_victim[ALLOC_NEXT] = end_segno + 1;
2592 ret = f2fs_gc(sbi, true, true, start_segno);
2593 if (ret == -EAGAIN)
2594 ret = 0;
2595 else if (ret < 0)
2596 break;
2597 start_segno++;
2598 }
2599 out:
2600 mnt_drop_write_file(filp);
2601 return ret;
2602 }
2603
2604 static int f2fs_ioc_get_features(struct file *filp, unsigned long arg)
2605 {
2606 struct inode *inode = file_inode(filp);
2607 u32 sb_feature = le32_to_cpu(F2FS_I_SB(inode)->raw_super->feature);
2608
2609 /* Must validate to set it with SQLite behavior in Android. */
2610 sb_feature |= F2FS_FEATURE_ATOMIC_WRITE;
2611
2612 return put_user(sb_feature, (u32 __user *)arg);
2613 }
2614
2615 #ifdef CONFIG_QUOTA
2616 int f2fs_transfer_project_quota(struct inode *inode, kprojid_t kprojid)
2617 {
2618 struct dquot *transfer_to[MAXQUOTAS] = {};
2619 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2620 struct super_block *sb = sbi->sb;
2621 int err = 0;
2622
2623 transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid));
2624 if (!IS_ERR(transfer_to[PRJQUOTA])) {
2625 err = __dquot_transfer(inode, transfer_to);
2626 if (err)
2627 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2628 dqput(transfer_to[PRJQUOTA]);
2629 }
2630 return err;
2631 }
2632
2633 static int f2fs_ioc_setproject(struct file *filp, __u32 projid)
2634 {
2635 struct inode *inode = file_inode(filp);
2636 struct f2fs_inode_info *fi = F2FS_I(inode);
2637 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2638 struct super_block *sb = sbi->sb;
2639 struct page *ipage;
2640 kprojid_t kprojid;
2641 int err;
2642
2643 if (!f2fs_sb_has_project_quota(sb)) {
2644 if (projid != F2FS_DEF_PROJID)
2645 return -EOPNOTSUPP;
2646 else
2647 return 0;
2648 }
2649
2650 if (!f2fs_has_extra_attr(inode))
2651 return -EOPNOTSUPP;
2652
2653 kprojid = make_kprojid(&init_user_ns, (projid_t)projid);
2654
2655 if (projid_eq(kprojid, F2FS_I(inode)->i_projid))
2656 return 0;
2657
2658 err = -EPERM;
2659 /* Is it quota file? Do not allow user to mess with it */
2660 if (IS_NOQUOTA(inode))
2661 return err;
2662
2663 ipage = f2fs_get_node_page(sbi, inode->i_ino);
2664 if (IS_ERR(ipage))
2665 return PTR_ERR(ipage);
2666
2667 if (!F2FS_FITS_IN_INODE(F2FS_INODE(ipage), fi->i_extra_isize,
2668 i_projid)) {
2669 err = -EOVERFLOW;
2670 f2fs_put_page(ipage, 1);
2671 return err;
2672 }
2673 f2fs_put_page(ipage, 1);
2674
2675 err = dquot_initialize(inode);
2676 if (err)
2677 return err;
2678
2679 f2fs_lock_op(sbi);
2680 err = f2fs_transfer_project_quota(inode, kprojid);
2681 if (err)
2682 goto out_unlock;
2683
2684 F2FS_I(inode)->i_projid = kprojid;
2685 inode->i_ctime = current_time(inode);
2686 f2fs_mark_inode_dirty_sync(inode, true);
2687 out_unlock:
2688 f2fs_unlock_op(sbi);
2689 return err;
2690 }
2691 #else
2692 int f2fs_transfer_project_quota(struct inode *inode, kprojid_t kprojid)
2693 {
2694 return 0;
2695 }
2696
2697 static int f2fs_ioc_setproject(struct file *filp, __u32 projid)
2698 {
2699 if (projid != F2FS_DEF_PROJID)
2700 return -EOPNOTSUPP;
2701 return 0;
2702 }
2703 #endif
2704
2705 /* Transfer internal flags to xflags */
2706 static inline __u32 f2fs_iflags_to_xflags(unsigned long iflags)
2707 {
2708 __u32 xflags = 0;
2709
2710 if (iflags & F2FS_SYNC_FL)
2711 xflags |= FS_XFLAG_SYNC;
2712 if (iflags & F2FS_IMMUTABLE_FL)
2713 xflags |= FS_XFLAG_IMMUTABLE;
2714 if (iflags & F2FS_APPEND_FL)
2715 xflags |= FS_XFLAG_APPEND;
2716 if (iflags & F2FS_NODUMP_FL)
2717 xflags |= FS_XFLAG_NODUMP;
2718 if (iflags & F2FS_NOATIME_FL)
2719 xflags |= FS_XFLAG_NOATIME;
2720 if (iflags & F2FS_PROJINHERIT_FL)
2721 xflags |= FS_XFLAG_PROJINHERIT;
2722 return xflags;
2723 }
2724
2725 #define F2FS_SUPPORTED_FS_XFLAGS (FS_XFLAG_SYNC | FS_XFLAG_IMMUTABLE | \
2726 FS_XFLAG_APPEND | FS_XFLAG_NODUMP | \
2727 FS_XFLAG_NOATIME | FS_XFLAG_PROJINHERIT)
2728
2729 /* Transfer xflags flags to internal */
2730 static inline unsigned long f2fs_xflags_to_iflags(__u32 xflags)
2731 {
2732 unsigned long iflags = 0;
2733
2734 if (xflags & FS_XFLAG_SYNC)
2735 iflags |= F2FS_SYNC_FL;
2736 if (xflags & FS_XFLAG_IMMUTABLE)
2737 iflags |= F2FS_IMMUTABLE_FL;
2738 if (xflags & FS_XFLAG_APPEND)
2739 iflags |= F2FS_APPEND_FL;
2740 if (xflags & FS_XFLAG_NODUMP)
2741 iflags |= F2FS_NODUMP_FL;
2742 if (xflags & FS_XFLAG_NOATIME)
2743 iflags |= F2FS_NOATIME_FL;
2744 if (xflags & FS_XFLAG_PROJINHERIT)
2745 iflags |= F2FS_PROJINHERIT_FL;
2746
2747 return iflags;
2748 }
2749
2750 static int f2fs_ioc_fsgetxattr(struct file *filp, unsigned long arg)
2751 {
2752 struct inode *inode = file_inode(filp);
2753 struct f2fs_inode_info *fi = F2FS_I(inode);
2754 struct fsxattr fa;
2755
2756 memset(&fa, 0, sizeof(struct fsxattr));
2757 fa.fsx_xflags = f2fs_iflags_to_xflags(fi->i_flags &
2758 F2FS_FL_USER_VISIBLE);
2759
2760 if (f2fs_sb_has_project_quota(inode->i_sb))
2761 fa.fsx_projid = (__u32)from_kprojid(&init_user_ns,
2762 fi->i_projid);
2763
2764 if (copy_to_user((struct fsxattr __user *)arg, &fa, sizeof(fa)))
2765 return -EFAULT;
2766 return 0;
2767 }
2768
2769 static int f2fs_ioctl_check_project(struct inode *inode, struct fsxattr *fa)
2770 {
2771 /*
2772 * Project Quota ID state is only allowed to change from within the init
2773 * namespace. Enforce that restriction only if we are trying to change
2774 * the quota ID state. Everything else is allowed in user namespaces.
2775 */
2776 if (current_user_ns() == &init_user_ns)
2777 return 0;
2778
2779 if (__kprojid_val(F2FS_I(inode)->i_projid) != fa->fsx_projid)
2780 return -EINVAL;
2781
2782 if (F2FS_I(inode)->i_flags & F2FS_PROJINHERIT_FL) {
2783 if (!(fa->fsx_xflags & FS_XFLAG_PROJINHERIT))
2784 return -EINVAL;
2785 } else {
2786 if (fa->fsx_xflags & FS_XFLAG_PROJINHERIT)
2787 return -EINVAL;
2788 }
2789
2790 return 0;
2791 }
2792
2793 static int f2fs_ioc_fssetxattr(struct file *filp, unsigned long arg)
2794 {
2795 struct inode *inode = file_inode(filp);
2796 struct f2fs_inode_info *fi = F2FS_I(inode);
2797 struct fsxattr fa;
2798 unsigned int flags;
2799 int err;
2800
2801 if (copy_from_user(&fa, (struct fsxattr __user *)arg, sizeof(fa)))
2802 return -EFAULT;
2803
2804 /* Make sure caller has proper permission */
2805 if (!inode_owner_or_capable(inode))
2806 return -EACCES;
2807
2808 if (fa.fsx_xflags & ~F2FS_SUPPORTED_FS_XFLAGS)
2809 return -EOPNOTSUPP;
2810
2811 flags = f2fs_xflags_to_iflags(fa.fsx_xflags);
2812 if (f2fs_mask_flags(inode->i_mode, flags) != flags)
2813 return -EOPNOTSUPP;
2814
2815 err = mnt_want_write_file(filp);
2816 if (err)
2817 return err;
2818
2819 inode_lock(inode);
2820 err = f2fs_ioctl_check_project(inode, &fa);
2821 if (err)
2822 goto out;
2823 flags = (fi->i_flags & ~F2FS_FL_XFLAG_VISIBLE) |
2824 (flags & F2FS_FL_XFLAG_VISIBLE);
2825 err = __f2fs_ioc_setflags(inode, flags);
2826 if (err)
2827 goto out;
2828
2829 err = f2fs_ioc_setproject(filp, fa.fsx_projid);
2830 out:
2831 inode_unlock(inode);
2832 mnt_drop_write_file(filp);
2833 return err;
2834 }
2835
2836 int f2fs_pin_file_control(struct inode *inode, bool inc)
2837 {
2838 struct f2fs_inode_info *fi = F2FS_I(inode);
2839 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2840
2841 /* Use i_gc_failures for normal file as a risk signal. */
2842 if (inc)
2843 f2fs_i_gc_failures_write(inode,
2844 fi->i_gc_failures[GC_FAILURE_PIN] + 1);
2845
2846 if (fi->i_gc_failures[GC_FAILURE_PIN] > sbi->gc_pin_file_threshold) {
2847 f2fs_msg(sbi->sb, KERN_WARNING,
2848 "%s: Enable GC = ino %lx after %x GC trials\n",
2849 __func__, inode->i_ino,
2850 fi->i_gc_failures[GC_FAILURE_PIN]);
2851 clear_inode_flag(inode, FI_PIN_FILE);
2852 return -EAGAIN;
2853 }
2854 return 0;
2855 }
2856
2857 static int f2fs_ioc_set_pin_file(struct file *filp, unsigned long arg)
2858 {
2859 struct inode *inode = file_inode(filp);
2860 __u32 pin;
2861 int ret = 0;
2862
2863 if (!inode_owner_or_capable(inode))
2864 return -EACCES;
2865
2866 if (get_user(pin, (__u32 __user *)arg))
2867 return -EFAULT;
2868
2869 if (!S_ISREG(inode->i_mode))
2870 return -EINVAL;
2871
2872 if (f2fs_readonly(F2FS_I_SB(inode)->sb))
2873 return -EROFS;
2874
2875 ret = mnt_want_write_file(filp);
2876 if (ret)
2877 return ret;
2878
2879 inode_lock(inode);
2880
2881 if (f2fs_should_update_outplace(inode, NULL)) {
2882 ret = -EINVAL;
2883 goto out;
2884 }
2885
2886 if (!pin) {
2887 clear_inode_flag(inode, FI_PIN_FILE);
2888 f2fs_i_gc_failures_write(inode, 0);
2889 goto done;
2890 }
2891
2892 if (f2fs_pin_file_control(inode, false)) {
2893 ret = -EAGAIN;
2894 goto out;
2895 }
2896 ret = f2fs_convert_inline_inode(inode);
2897 if (ret)
2898 goto out;
2899
2900 set_inode_flag(inode, FI_PIN_FILE);
2901 ret = F2FS_I(inode)->i_gc_failures[GC_FAILURE_PIN];
2902 done:
2903 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
2904 out:
2905 inode_unlock(inode);
2906 mnt_drop_write_file(filp);
2907 return ret;
2908 }
2909
2910 static int f2fs_ioc_get_pin_file(struct file *filp, unsigned long arg)
2911 {
2912 struct inode *inode = file_inode(filp);
2913 __u32 pin = 0;
2914
2915 if (is_inode_flag_set(inode, FI_PIN_FILE))
2916 pin = F2FS_I(inode)->i_gc_failures[GC_FAILURE_PIN];
2917 return put_user(pin, (u32 __user *)arg);
2918 }
2919
2920 int f2fs_precache_extents(struct inode *inode)
2921 {
2922 struct f2fs_inode_info *fi = F2FS_I(inode);
2923 struct f2fs_map_blocks map;
2924 pgoff_t m_next_extent;
2925 loff_t end;
2926 int err;
2927
2928 if (is_inode_flag_set(inode, FI_NO_EXTENT))
2929 return -EOPNOTSUPP;
2930
2931 map.m_lblk = 0;
2932 map.m_next_pgofs = NULL;
2933 map.m_next_extent = &m_next_extent;
2934 map.m_seg_type = NO_CHECK_TYPE;
2935 end = F2FS_I_SB(inode)->max_file_blocks;
2936
2937 while (map.m_lblk < end) {
2938 map.m_len = end - map.m_lblk;
2939
2940 down_write(&fi->i_gc_rwsem[WRITE]);
2941 err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_PRECACHE);
2942 up_write(&fi->i_gc_rwsem[WRITE]);
2943 if (err)
2944 return err;
2945
2946 map.m_lblk = m_next_extent;
2947 }
2948
2949 return err;
2950 }
2951
2952 static int f2fs_ioc_precache_extents(struct file *filp, unsigned long arg)
2953 {
2954 return f2fs_precache_extents(file_inode(filp));
2955 }
2956
2957 long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
2958 {
2959 if (unlikely(f2fs_cp_error(F2FS_I_SB(file_inode(filp)))))
2960 return -EIO;
2961
2962 switch (cmd) {
2963 case F2FS_IOC_GETFLAGS:
2964 return f2fs_ioc_getflags(filp, arg);
2965 case F2FS_IOC_SETFLAGS:
2966 return f2fs_ioc_setflags(filp, arg);
2967 case F2FS_IOC_GETVERSION:
2968 return f2fs_ioc_getversion(filp, arg);
2969 case F2FS_IOC_START_ATOMIC_WRITE:
2970 return f2fs_ioc_start_atomic_write(filp);
2971 case F2FS_IOC_COMMIT_ATOMIC_WRITE:
2972 return f2fs_ioc_commit_atomic_write(filp);
2973 case F2FS_IOC_START_VOLATILE_WRITE:
2974 return f2fs_ioc_start_volatile_write(filp);
2975 case F2FS_IOC_RELEASE_VOLATILE_WRITE:
2976 return f2fs_ioc_release_volatile_write(filp);
2977 case F2FS_IOC_ABORT_VOLATILE_WRITE:
2978 return f2fs_ioc_abort_volatile_write(filp);
2979 case F2FS_IOC_SHUTDOWN:
2980 return f2fs_ioc_shutdown(filp, arg);
2981 case FITRIM:
2982 return f2fs_ioc_fitrim(filp, arg);
2983 case F2FS_IOC_SET_ENCRYPTION_POLICY:
2984 return f2fs_ioc_set_encryption_policy(filp, arg);
2985 case F2FS_IOC_GET_ENCRYPTION_POLICY:
2986 return f2fs_ioc_get_encryption_policy(filp, arg);
2987 case F2FS_IOC_GET_ENCRYPTION_PWSALT:
2988 return f2fs_ioc_get_encryption_pwsalt(filp, arg);
2989 case F2FS_IOC_GARBAGE_COLLECT:
2990 return f2fs_ioc_gc(filp, arg);
2991 case F2FS_IOC_GARBAGE_COLLECT_RANGE:
2992 return f2fs_ioc_gc_range(filp, arg);
2993 case F2FS_IOC_WRITE_CHECKPOINT:
2994 return f2fs_ioc_write_checkpoint(filp, arg);
2995 case F2FS_IOC_DEFRAGMENT:
2996 return f2fs_ioc_defragment(filp, arg);
2997 case F2FS_IOC_MOVE_RANGE:
2998 return f2fs_ioc_move_range(filp, arg);
2999 case F2FS_IOC_FLUSH_DEVICE:
3000 return f2fs_ioc_flush_device(filp, arg);
3001 case F2FS_IOC_GET_FEATURES:
3002 return f2fs_ioc_get_features(filp, arg);
3003 case F2FS_IOC_FSGETXATTR:
3004 return f2fs_ioc_fsgetxattr(filp, arg);
3005 case F2FS_IOC_FSSETXATTR:
3006 return f2fs_ioc_fssetxattr(filp, arg);
3007 case F2FS_IOC_GET_PIN_FILE:
3008 return f2fs_ioc_get_pin_file(filp, arg);
3009 case F2FS_IOC_SET_PIN_FILE:
3010 return f2fs_ioc_set_pin_file(filp, arg);
3011 case F2FS_IOC_PRECACHE_EXTENTS:
3012 return f2fs_ioc_precache_extents(filp, arg);
3013 default:
3014 return -ENOTTY;
3015 }
3016 }
3017
3018 static ssize_t f2fs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
3019 {
3020 struct file *file = iocb->ki_filp;
3021 struct inode *inode = file_inode(file);
3022 ssize_t ret;
3023
3024 if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
3025 return -EIO;
3026
3027 if ((iocb->ki_flags & IOCB_NOWAIT) && !(iocb->ki_flags & IOCB_DIRECT))
3028 return -EINVAL;
3029
3030 if (!inode_trylock(inode)) {
3031 if (iocb->ki_flags & IOCB_NOWAIT)
3032 return -EAGAIN;
3033 inode_lock(inode);
3034 }
3035
3036 ret = generic_write_checks(iocb, from);
3037 if (ret > 0) {
3038 bool preallocated = false;
3039 size_t target_size = 0;
3040 int err;
3041
3042 if (iov_iter_fault_in_readable(from, iov_iter_count(from)))
3043 set_inode_flag(inode, FI_NO_PREALLOC);
3044
3045 if ((iocb->ki_flags & IOCB_NOWAIT) &&
3046 (iocb->ki_flags & IOCB_DIRECT)) {
3047 if (!f2fs_overwrite_io(inode, iocb->ki_pos,
3048 iov_iter_count(from)) ||
3049 f2fs_has_inline_data(inode) ||
3050 f2fs_force_buffered_io(inode,
3051 iocb, from)) {
3052 clear_inode_flag(inode,
3053 FI_NO_PREALLOC);
3054 inode_unlock(inode);
3055 return -EAGAIN;
3056 }
3057
3058 } else {
3059 preallocated = true;
3060 target_size = iocb->ki_pos + iov_iter_count(from);
3061
3062 err = f2fs_preallocate_blocks(iocb, from);
3063 if (err) {
3064 clear_inode_flag(inode, FI_NO_PREALLOC);
3065 inode_unlock(inode);
3066 return err;
3067 }
3068 }
3069 ret = __generic_file_write_iter(iocb, from);
3070 clear_inode_flag(inode, FI_NO_PREALLOC);
3071
3072 /* if we couldn't write data, we should deallocate blocks. */
3073 if (preallocated && i_size_read(inode) < target_size)
3074 f2fs_truncate(inode);
3075
3076 if (ret > 0)
3077 f2fs_update_iostat(F2FS_I_SB(inode), APP_WRITE_IO, ret);
3078 }
3079 inode_unlock(inode);
3080
3081 if (ret > 0)
3082 ret = generic_write_sync(iocb, ret);
3083 return ret;
3084 }
3085
3086 #ifdef CONFIG_COMPAT
3087 long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
3088 {
3089 switch (cmd) {
3090 case F2FS_IOC32_GETFLAGS:
3091 cmd = F2FS_IOC_GETFLAGS;
3092 break;
3093 case F2FS_IOC32_SETFLAGS:
3094 cmd = F2FS_IOC_SETFLAGS;
3095 break;
3096 case F2FS_IOC32_GETVERSION:
3097 cmd = F2FS_IOC_GETVERSION;
3098 break;
3099 case F2FS_IOC_START_ATOMIC_WRITE:
3100 case F2FS_IOC_COMMIT_ATOMIC_WRITE:
3101 case F2FS_IOC_START_VOLATILE_WRITE:
3102 case F2FS_IOC_RELEASE_VOLATILE_WRITE:
3103 case F2FS_IOC_ABORT_VOLATILE_WRITE:
3104 case F2FS_IOC_SHUTDOWN:
3105 case F2FS_IOC_SET_ENCRYPTION_POLICY:
3106 case F2FS_IOC_GET_ENCRYPTION_PWSALT:
3107 case F2FS_IOC_GET_ENCRYPTION_POLICY:
3108 case F2FS_IOC_GARBAGE_COLLECT:
3109 case F2FS_IOC_GARBAGE_COLLECT_RANGE:
3110 case F2FS_IOC_WRITE_CHECKPOINT:
3111 case F2FS_IOC_DEFRAGMENT:
3112 case F2FS_IOC_MOVE_RANGE:
3113 case F2FS_IOC_FLUSH_DEVICE:
3114 case F2FS_IOC_GET_FEATURES:
3115 case F2FS_IOC_FSGETXATTR:
3116 case F2FS_IOC_FSSETXATTR:
3117 case F2FS_IOC_GET_PIN_FILE:
3118 case F2FS_IOC_SET_PIN_FILE:
3119 case F2FS_IOC_PRECACHE_EXTENTS:
3120 break;
3121 default:
3122 return -ENOIOCTLCMD;
3123 }
3124 return f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
3125 }
3126 #endif
3127
3128 const struct file_operations f2fs_file_operations = {
3129 .llseek = f2fs_llseek,
3130 .read_iter = generic_file_read_iter,
3131 .write_iter = f2fs_file_write_iter,
3132 .open = f2fs_file_open,
3133 .release = f2fs_release_file,
3134 .mmap = f2fs_file_mmap,
3135 .flush = f2fs_file_flush,
3136 .fsync = f2fs_sync_file,
3137 .fallocate = f2fs_fallocate,
3138 .unlocked_ioctl = f2fs_ioctl,
3139 #ifdef CONFIG_COMPAT
3140 .compat_ioctl = f2fs_compat_ioctl,
3141 #endif
3142 .splice_read = generic_file_splice_read,
3143 .splice_write = iter_file_splice_write,
3144 };
Linux with added FPC-III support