1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * fs/f2fs/file.c
4 *
5 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
6 * http://www.samsung.com/
7 */
8 #include <linux/fs.h>
9 #include <linux/f2fs_fs.h>
10 #include <linux/stat.h>
11 #include <linux/buffer_head.h>
12 #include <linux/writeback.h>
13 #include <linux/blkdev.h>
14 #include <linux/falloc.h>
15 #include <linux/types.h>
16 #include <linux/compat.h>
17 #include <linux/uaccess.h>
18 #include <linux/mount.h>
19 #include <linux/pagevec.h>
20 #include <linux/uio.h>
21 #include <linux/uuid.h>
22 #include <linux/file.h>
23 #include <linux/nls.h>
24 #include <linux/sched/signal.h>
25 #include <linux/fileattr.h>
26 #include <linux/fadvise.h>
27 #include <linux/iomap.h>
28
29 #include "f2fs.h"
30 #include "node.h"
31 #include "segment.h"
32 #include "xattr.h"
33 #include "acl.h"
34 #include "gc.h"
35 #include "iostat.h"
36 #include <trace/events/f2fs.h>
37 #include <uapi/linux/f2fs.h>
38
f2fs_filemap_fault(struct vm_fault * vmf)39 static vm_fault_t f2fs_filemap_fault(struct vm_fault *vmf)
40 {
41 struct inode *inode = file_inode(vmf->vma->vm_file);
42 vm_flags_t flags = vmf->vma->vm_flags;
43 vm_fault_t ret;
44
45 ret = filemap_fault(vmf);
46 if (ret & VM_FAULT_LOCKED)
47 f2fs_update_iostat(F2FS_I_SB(inode), inode,
48 APP_MAPPED_READ_IO, F2FS_BLKSIZE);
49
50 trace_f2fs_filemap_fault(inode, vmf->pgoff, flags, ret);
51
52 return ret;
53 }
54
f2fs_vm_page_mkwrite(struct vm_fault * vmf)55 static vm_fault_t f2fs_vm_page_mkwrite(struct vm_fault *vmf)
56 {
57 struct page *page = vmf->page;
58 struct inode *inode = file_inode(vmf->vma->vm_file);
59 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
60 struct dnode_of_data dn;
61 bool need_alloc = !f2fs_is_pinned_file(inode);
62 int err = 0;
63 vm_fault_t ret;
64
65 if (unlikely(IS_IMMUTABLE(inode)))
66 return VM_FAULT_SIGBUS;
67
68 if (is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) {
69 err = -EIO;
70 goto out;
71 }
72
73 if (unlikely(f2fs_cp_error(sbi))) {
74 err = -EIO;
75 goto out;
76 }
77
78 if (!f2fs_is_checkpoint_ready(sbi)) {
79 err = -ENOSPC;
80 goto out;
81 }
82
83 err = f2fs_convert_inline_inode(inode);
84 if (err)
85 goto out;
86
87 #ifdef CONFIG_F2FS_FS_COMPRESSION
88 if (f2fs_compressed_file(inode)) {
89 int ret = f2fs_is_compressed_cluster(inode, page->index);
90
91 if (ret < 0) {
92 err = ret;
93 goto out;
94 } else if (ret) {
95 need_alloc = false;
96 }
97 }
98 #endif
99 /* should do out of any locked page */
100 if (need_alloc)
101 f2fs_balance_fs(sbi, true);
102
103 sb_start_pagefault(inode->i_sb);
104
105 f2fs_bug_on(sbi, f2fs_has_inline_data(inode));
106
107 file_update_time(vmf->vma->vm_file);
108 filemap_invalidate_lock_shared(inode->i_mapping);
109 lock_page(page);
110 if (unlikely(page->mapping != inode->i_mapping ||
111 page_offset(page) > i_size_read(inode) ||
112 !PageUptodate(page))) {
113 unlock_page(page);
114 err = -EFAULT;
115 goto out_sem;
116 }
117
118 set_new_dnode(&dn, inode, NULL, NULL, 0);
119 if (need_alloc) {
120 /* block allocation */
121 err = f2fs_get_block_locked(&dn, page->index);
122 } else {
123 err = f2fs_get_dnode_of_data(&dn, page->index, LOOKUP_NODE);
124 f2fs_put_dnode(&dn);
125 if (f2fs_is_pinned_file(inode) &&
126 !__is_valid_data_blkaddr(dn.data_blkaddr))
127 err = -EIO;
128 }
129
130 if (err) {
131 unlock_page(page);
132 goto out_sem;
133 }
134
135 f2fs_wait_on_page_writeback(page, DATA, false, true);
136
137 /* wait for GCed page writeback via META_MAPPING */
138 f2fs_wait_on_block_writeback(inode, dn.data_blkaddr);
139
140 /*
141 * check to see if the page is mapped already (no holes)
142 */
143 if (PageMappedToDisk(page))
144 goto out_sem;
145
146 /* page is wholly or partially inside EOF */
147 if (((loff_t)(page->index + 1) << PAGE_SHIFT) >
148 i_size_read(inode)) {
149 loff_t offset;
150
151 offset = i_size_read(inode) & ~PAGE_MASK;
152 zero_user_segment(page, offset, PAGE_SIZE);
153 }
154 set_page_dirty(page);
155
156 f2fs_update_iostat(sbi, inode, APP_MAPPED_IO, F2FS_BLKSIZE);
157 f2fs_update_time(sbi, REQ_TIME);
158
159 out_sem:
160 filemap_invalidate_unlock_shared(inode->i_mapping);
161
162 sb_end_pagefault(inode->i_sb);
163 out:
164 ret = vmf_fs_error(err);
165
166 trace_f2fs_vm_page_mkwrite(inode, page->index, vmf->vma->vm_flags, ret);
167 return ret;
168 }
169
170 static const struct vm_operations_struct f2fs_file_vm_ops = {
171 .fault = f2fs_filemap_fault,
172 .map_pages = filemap_map_pages,
173 .page_mkwrite = f2fs_vm_page_mkwrite,
174 };
175
get_parent_ino(struct inode * inode,nid_t * pino)176 static int get_parent_ino(struct inode *inode, nid_t *pino)
177 {
178 struct dentry *dentry;
179
180 /*
181 * Make sure to get the non-deleted alias. The alias associated with
182 * the open file descriptor being fsync()'ed may be deleted already.
183 */
184 dentry = d_find_alias(inode);
185 if (!dentry)
186 return 0;
187
188 *pino = parent_ino(dentry);
189 dput(dentry);
190 return 1;
191 }
192
need_do_checkpoint(struct inode * inode)193 static inline enum cp_reason_type need_do_checkpoint(struct inode *inode)
194 {
195 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
196 enum cp_reason_type cp_reason = CP_NO_NEEDED;
197
198 if (!S_ISREG(inode->i_mode))
199 cp_reason = CP_NON_REGULAR;
200 else if (f2fs_compressed_file(inode))
201 cp_reason = CP_COMPRESSED;
202 else if (inode->i_nlink != 1)
203 cp_reason = CP_HARDLINK;
204 else if (is_sbi_flag_set(sbi, SBI_NEED_CP))
205 cp_reason = CP_SB_NEED_CP;
206 else if (file_wrong_pino(inode))
207 cp_reason = CP_WRONG_PINO;
208 else if (!f2fs_space_for_roll_forward(sbi))
209 cp_reason = CP_NO_SPC_ROLL;
210 else if (!f2fs_is_checkpointed_node(sbi, F2FS_I(inode)->i_pino))
211 cp_reason = CP_NODE_NEED_CP;
212 else if (test_opt(sbi, FASTBOOT))
213 cp_reason = CP_FASTBOOT_MODE;
214 else if (F2FS_OPTION(sbi).active_logs == 2)
215 cp_reason = CP_SPEC_LOG_NUM;
216 else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT &&
217 f2fs_need_dentry_mark(sbi, inode->i_ino) &&
218 f2fs_exist_written_data(sbi, F2FS_I(inode)->i_pino,
219 TRANS_DIR_INO))
220 cp_reason = CP_RECOVER_DIR;
221
222 return cp_reason;
223 }
224
need_inode_page_update(struct f2fs_sb_info * sbi,nid_t ino)225 static bool need_inode_page_update(struct f2fs_sb_info *sbi, nid_t ino)
226 {
227 struct page *i = find_get_page(NODE_MAPPING(sbi), ino);
228 bool ret = false;
229 /* But we need to avoid that there are some inode updates */
230 if ((i && PageDirty(i)) || f2fs_need_inode_block_update(sbi, ino))
231 ret = true;
232 f2fs_put_page(i, 0);
233 return ret;
234 }
235
try_to_fix_pino(struct inode * inode)236 static void try_to_fix_pino(struct inode *inode)
237 {
238 struct f2fs_inode_info *fi = F2FS_I(inode);
239 nid_t pino;
240
241 f2fs_down_write(&fi->i_sem);
242 if (file_wrong_pino(inode) && inode->i_nlink == 1 &&
243 get_parent_ino(inode, &pino)) {
244 f2fs_i_pino_write(inode, pino);
245 file_got_pino(inode);
246 }
247 f2fs_up_write(&fi->i_sem);
248 }
249
f2fs_do_sync_file(struct file * file,loff_t start,loff_t end,int datasync,bool atomic)250 static int f2fs_do_sync_file(struct file *file, loff_t start, loff_t end,
251 int datasync, bool atomic)
252 {
253 struct inode *inode = file->f_mapping->host;
254 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
255 nid_t ino = inode->i_ino;
256 int ret = 0;
257 enum cp_reason_type cp_reason = 0;
258 struct writeback_control wbc = {
259 .sync_mode = WB_SYNC_ALL,
260 .nr_to_write = LONG_MAX,
261 .for_reclaim = 0,
262 };
263 unsigned int seq_id = 0;
264
265 if (unlikely(f2fs_readonly(inode->i_sb)))
266 return 0;
267
268 trace_f2fs_sync_file_enter(inode);
269
270 if (S_ISDIR(inode->i_mode))
271 goto go_write;
272
273 /* if fdatasync is triggered, let's do in-place-update */
274 if (datasync || get_dirty_pages(inode) <= SM_I(sbi)->min_fsync_blocks)
275 set_inode_flag(inode, FI_NEED_IPU);
276 ret = file_write_and_wait_range(file, start, end);
277 clear_inode_flag(inode, FI_NEED_IPU);
278
279 if (ret || is_sbi_flag_set(sbi, SBI_CP_DISABLED)) {
280 trace_f2fs_sync_file_exit(inode, cp_reason, datasync, ret);
281 return ret;
282 }
283
284 /* if the inode is dirty, let's recover all the time */
285 if (!f2fs_skip_inode_update(inode, datasync)) {
286 f2fs_write_inode(inode, NULL);
287 goto go_write;
288 }
289
290 /*
291 * if there is no written data, don't waste time to write recovery info.
292 */
293 if (!is_inode_flag_set(inode, FI_APPEND_WRITE) &&
294 !f2fs_exist_written_data(sbi, ino, APPEND_INO)) {
295
296 /* it may call write_inode just prior to fsync */
297 if (need_inode_page_update(sbi, ino))
298 goto go_write;
299
300 if (is_inode_flag_set(inode, FI_UPDATE_WRITE) ||
301 f2fs_exist_written_data(sbi, ino, UPDATE_INO))
302 goto flush_out;
303 goto out;
304 } else {
305 /*
306 * for OPU case, during fsync(), node can be persisted before
307 * data when lower device doesn't support write barrier, result
308 * in data corruption after SPO.
309 * So for strict fsync mode, force to use atomic write semantics
310 * to keep write order in between data/node and last node to
311 * avoid potential data corruption.
312 */
313 if (F2FS_OPTION(sbi).fsync_mode ==
314 FSYNC_MODE_STRICT && !atomic)
315 atomic = true;
316 }
317 go_write:
318 /*
319 * Both of fdatasync() and fsync() are able to be recovered from
320 * sudden-power-off.
321 */
322 f2fs_down_read(&F2FS_I(inode)->i_sem);
323 cp_reason = need_do_checkpoint(inode);
324 f2fs_up_read(&F2FS_I(inode)->i_sem);
325
326 if (cp_reason) {
327 /* all the dirty node pages should be flushed for POR */
328 ret = f2fs_sync_fs(inode->i_sb, 1);
329
330 /*
331 * We've secured consistency through sync_fs. Following pino
332 * will be used only for fsynced inodes after checkpoint.
333 */
334 try_to_fix_pino(inode);
335 clear_inode_flag(inode, FI_APPEND_WRITE);
336 clear_inode_flag(inode, FI_UPDATE_WRITE);
337 goto out;
338 }
339 sync_nodes:
340 atomic_inc(&sbi->wb_sync_req[NODE]);
341 ret = f2fs_fsync_node_pages(sbi, inode, &wbc, atomic, &seq_id);
342 atomic_dec(&sbi->wb_sync_req[NODE]);
343 if (ret)
344 goto out;
345
346 /* if cp_error was enabled, we should avoid infinite loop */
347 if (unlikely(f2fs_cp_error(sbi))) {
348 ret = -EIO;
349 goto out;
350 }
351
352 if (f2fs_need_inode_block_update(sbi, ino)) {
353 f2fs_mark_inode_dirty_sync(inode, true);
354 f2fs_write_inode(inode, NULL);
355 goto sync_nodes;
356 }
357
358 /*
359 * If it's atomic_write, it's just fine to keep write ordering. So
360 * here we don't need to wait for node write completion, since we use
361 * node chain which serializes node blocks. If one of node writes are
362 * reordered, we can see simply broken chain, resulting in stopping
363 * roll-forward recovery. It means we'll recover all or none node blocks
364 * given fsync mark.
365 */
366 if (!atomic) {
367 ret = f2fs_wait_on_node_pages_writeback(sbi, seq_id);
368 if (ret)
369 goto out;
370 }
371
372 /* once recovery info is written, don't need to tack this */
373 f2fs_remove_ino_entry(sbi, ino, APPEND_INO);
374 clear_inode_flag(inode, FI_APPEND_WRITE);
375 flush_out:
376 if ((!atomic && F2FS_OPTION(sbi).fsync_mode != FSYNC_MODE_NOBARRIER) ||
377 (atomic && !test_opt(sbi, NOBARRIER) && f2fs_sb_has_blkzoned(sbi)))
378 ret = f2fs_issue_flush(sbi, inode->i_ino);
379 if (!ret) {
380 f2fs_remove_ino_entry(sbi, ino, UPDATE_INO);
381 clear_inode_flag(inode, FI_UPDATE_WRITE);
382 f2fs_remove_ino_entry(sbi, ino, FLUSH_INO);
383 }
384 f2fs_update_time(sbi, REQ_TIME);
385 out:
386 trace_f2fs_sync_file_exit(inode, cp_reason, datasync, ret);
387 return ret;
388 }
389
f2fs_sync_file(struct file * file,loff_t start,loff_t end,int datasync)390 int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
391 {
392 if (unlikely(f2fs_cp_error(F2FS_I_SB(file_inode(file)))))
393 return -EIO;
394 return f2fs_do_sync_file(file, start, end, datasync, false);
395 }
396
__found_offset(struct address_space * mapping,struct dnode_of_data * dn,pgoff_t index,int whence)397 static bool __found_offset(struct address_space *mapping,
398 struct dnode_of_data *dn, pgoff_t index, int whence)
399 {
400 block_t blkaddr = f2fs_data_blkaddr(dn);
401 struct inode *inode = mapping->host;
402 bool compressed_cluster = false;
403
404 if (f2fs_compressed_file(inode)) {
405 block_t first_blkaddr = data_blkaddr(dn->inode, dn->node_page,
406 ALIGN_DOWN(dn->ofs_in_node, F2FS_I(inode)->i_cluster_size));
407
408 compressed_cluster = first_blkaddr == COMPRESS_ADDR;
409 }
410
411 switch (whence) {
412 case SEEK_DATA:
413 if (__is_valid_data_blkaddr(blkaddr))
414 return true;
415 if (blkaddr == NEW_ADDR &&
416 xa_get_mark(&mapping->i_pages, index, PAGECACHE_TAG_DIRTY))
417 return true;
418 if (compressed_cluster)
419 return true;
420 break;
421 case SEEK_HOLE:
422 if (compressed_cluster)
423 return false;
424 if (blkaddr == NULL_ADDR)
425 return true;
426 break;
427 }
428 return false;
429 }
430
f2fs_seek_block(struct file * file,loff_t offset,int whence)431 static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence)
432 {
433 struct inode *inode = file->f_mapping->host;
434 loff_t maxbytes = inode->i_sb->s_maxbytes;
435 struct dnode_of_data dn;
436 pgoff_t pgofs, end_offset;
437 loff_t data_ofs = offset;
438 loff_t isize;
439 int err = 0;
440
441 inode_lock_shared(inode);
442
443 isize = i_size_read(inode);
444 if (offset >= isize)
445 goto fail;
446
447 /* handle inline data case */
448 if (f2fs_has_inline_data(inode)) {
449 if (whence == SEEK_HOLE) {
450 data_ofs = isize;
451 goto found;
452 } else if (whence == SEEK_DATA) {
453 data_ofs = offset;
454 goto found;
455 }
456 }
457
458 pgofs = (pgoff_t)(offset >> PAGE_SHIFT);
459
460 for (; data_ofs < isize; data_ofs = (loff_t)pgofs << PAGE_SHIFT) {
461 set_new_dnode(&dn, inode, NULL, NULL, 0);
462 err = f2fs_get_dnode_of_data(&dn, pgofs, LOOKUP_NODE);
463 if (err && err != -ENOENT) {
464 goto fail;
465 } else if (err == -ENOENT) {
466 /* direct node does not exists */
467 if (whence == SEEK_DATA) {
468 pgofs = f2fs_get_next_page_offset(&dn, pgofs);
469 continue;
470 } else {
471 goto found;
472 }
473 }
474
475 end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
476
477 /* find data/hole in dnode block */
478 for (; dn.ofs_in_node < end_offset;
479 dn.ofs_in_node++, pgofs++,
480 data_ofs = (loff_t)pgofs << PAGE_SHIFT) {
481 block_t blkaddr;
482
483 blkaddr = f2fs_data_blkaddr(&dn);
484
485 if (__is_valid_data_blkaddr(blkaddr) &&
486 !f2fs_is_valid_blkaddr(F2FS_I_SB(inode),
487 blkaddr, DATA_GENERIC_ENHANCE)) {
488 f2fs_put_dnode(&dn);
489 goto fail;
490 }
491
492 if (__found_offset(file->f_mapping, &dn,
493 pgofs, whence)) {
494 f2fs_put_dnode(&dn);
495 goto found;
496 }
497 }
498 f2fs_put_dnode(&dn);
499 }
500
501 if (whence == SEEK_DATA)
502 goto fail;
503 found:
504 if (whence == SEEK_HOLE && data_ofs > isize)
505 data_ofs = isize;
506 inode_unlock_shared(inode);
507 return vfs_setpos(file, data_ofs, maxbytes);
508 fail:
509 inode_unlock_shared(inode);
510 return -ENXIO;
511 }
512
f2fs_llseek(struct file * file,loff_t offset,int whence)513 static loff_t f2fs_llseek(struct file *file, loff_t offset, int whence)
514 {
515 struct inode *inode = file->f_mapping->host;
516 loff_t maxbytes = inode->i_sb->s_maxbytes;
517
518 if (f2fs_compressed_file(inode))
519 maxbytes = max_file_blocks(inode) << F2FS_BLKSIZE_BITS;
520
521 switch (whence) {
522 case SEEK_SET:
523 case SEEK_CUR:
524 case SEEK_END:
525 return generic_file_llseek_size(file, offset, whence,
526 maxbytes, i_size_read(inode));
527 case SEEK_DATA:
528 case SEEK_HOLE:
529 if (offset < 0)
530 return -ENXIO;
531 return f2fs_seek_block(file, offset, whence);
532 }
533
534 return -EINVAL;
535 }
536
f2fs_file_mmap(struct file * file,struct vm_area_struct * vma)537 static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma)
538 {
539 struct inode *inode = file_inode(file);
540
541 if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
542 return -EIO;
543
544 if (!f2fs_is_compress_backend_ready(inode))
545 return -EOPNOTSUPP;
546
547 file_accessed(file);
548 vma->vm_ops = &f2fs_file_vm_ops;
549
550 f2fs_down_read(&F2FS_I(inode)->i_sem);
551 set_inode_flag(inode, FI_MMAP_FILE);
552 f2fs_up_read(&F2FS_I(inode)->i_sem);
553
554 return 0;
555 }
556
f2fs_file_open(struct inode * inode,struct file * filp)557 static int f2fs_file_open(struct inode *inode, struct file *filp)
558 {
559 int err = fscrypt_file_open(inode, filp);
560
561 if (err)
562 return err;
563
564 if (!f2fs_is_compress_backend_ready(inode))
565 return -EOPNOTSUPP;
566
567 err = fsverity_file_open(inode, filp);
568 if (err)
569 return err;
570
571 filp->f_mode |= FMODE_NOWAIT;
572 filp->f_mode |= FMODE_CAN_ODIRECT;
573
574 return dquot_file_open(inode, filp);
575 }
576
f2fs_truncate_data_blocks_range(struct dnode_of_data * dn,int count)577 void f2fs_truncate_data_blocks_range(struct dnode_of_data *dn, int count)
578 {
579 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
580 int nr_free = 0, ofs = dn->ofs_in_node, len = count;
581 __le32 *addr;
582 bool compressed_cluster = false;
583 int cluster_index = 0, valid_blocks = 0;
584 int cluster_size = F2FS_I(dn->inode)->i_cluster_size;
585 bool released = !atomic_read(&F2FS_I(dn->inode)->i_compr_blocks);
586
587 addr = get_dnode_addr(dn->inode, dn->node_page) + ofs;
588
589 /* Assumption: truncation starts with cluster */
590 for (; count > 0; count--, addr++, dn->ofs_in_node++, cluster_index++) {
591 block_t blkaddr = le32_to_cpu(*addr);
592
593 if (f2fs_compressed_file(dn->inode) &&
594 !(cluster_index & (cluster_size - 1))) {
595 if (compressed_cluster)
596 f2fs_i_compr_blocks_update(dn->inode,
597 valid_blocks, false);
598 compressed_cluster = (blkaddr == COMPRESS_ADDR);
599 valid_blocks = 0;
600 }
601
602 if (blkaddr == NULL_ADDR)
603 continue;
604
605 f2fs_set_data_blkaddr(dn, NULL_ADDR);
606
607 if (__is_valid_data_blkaddr(blkaddr)) {
608 if (time_to_inject(sbi, FAULT_BLKADDR_CONSISTENCE))
609 continue;
610 if (!f2fs_is_valid_blkaddr_raw(sbi, blkaddr,
611 DATA_GENERIC_ENHANCE))
612 continue;
613 if (compressed_cluster)
614 valid_blocks++;
615 }
616
617 f2fs_invalidate_blocks(sbi, blkaddr);
618
619 if (!released || blkaddr != COMPRESS_ADDR)
620 nr_free++;
621 }
622
623 if (compressed_cluster)
624 f2fs_i_compr_blocks_update(dn->inode, valid_blocks, false);
625
626 if (nr_free) {
627 pgoff_t fofs;
628 /*
629 * once we invalidate valid blkaddr in range [ofs, ofs + count],
630 * we will invalidate all blkaddr in the whole range.
631 */
632 fofs = f2fs_start_bidx_of_node(ofs_of_node(dn->node_page),
633 dn->inode) + ofs;
634 f2fs_update_read_extent_cache_range(dn, fofs, 0, len);
635 f2fs_update_age_extent_cache_range(dn, fofs, len);
636 dec_valid_block_count(sbi, dn->inode, nr_free);
637 }
638 dn->ofs_in_node = ofs;
639
640 f2fs_update_time(sbi, REQ_TIME);
641 trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid,
642 dn->ofs_in_node, nr_free);
643 }
644
truncate_partial_data_page(struct inode * inode,u64 from,bool cache_only)645 static int truncate_partial_data_page(struct inode *inode, u64 from,
646 bool cache_only)
647 {
648 loff_t offset = from & (PAGE_SIZE - 1);
649 pgoff_t index = from >> PAGE_SHIFT;
650 struct address_space *mapping = inode->i_mapping;
651 struct page *page;
652
653 if (!offset && !cache_only)
654 return 0;
655
656 if (cache_only) {
657 page = find_lock_page(mapping, index);
658 if (page && PageUptodate(page))
659 goto truncate_out;
660 f2fs_put_page(page, 1);
661 return 0;
662 }
663
664 page = f2fs_get_lock_data_page(inode, index, true);
665 if (IS_ERR(page))
666 return PTR_ERR(page) == -ENOENT ? 0 : PTR_ERR(page);
667 truncate_out:
668 f2fs_wait_on_page_writeback(page, DATA, true, true);
669 zero_user(page, offset, PAGE_SIZE - offset);
670
671 /* An encrypted inode should have a key and truncate the last page. */
672 f2fs_bug_on(F2FS_I_SB(inode), cache_only && IS_ENCRYPTED(inode));
673 if (!cache_only)
674 set_page_dirty(page);
675 f2fs_put_page(page, 1);
676 return 0;
677 }
678
f2fs_do_truncate_blocks(struct inode * inode,u64 from,bool lock)679 int f2fs_do_truncate_blocks(struct inode *inode, u64 from, bool lock)
680 {
681 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
682 struct dnode_of_data dn;
683 pgoff_t free_from;
684 int count = 0, err = 0;
685 struct page *ipage;
686 bool truncate_page = false;
687
688 trace_f2fs_truncate_blocks_enter(inode, from);
689
690 free_from = (pgoff_t)F2FS_BLK_ALIGN(from);
691
692 if (free_from >= max_file_blocks(inode))
693 goto free_partial;
694
695 if (lock)
696 f2fs_lock_op(sbi);
697
698 ipage = f2fs_get_node_page(sbi, inode->i_ino);
699 if (IS_ERR(ipage)) {
700 err = PTR_ERR(ipage);
701 goto out;
702 }
703
704 if (f2fs_has_inline_data(inode)) {
705 f2fs_truncate_inline_inode(inode, ipage, from);
706 f2fs_put_page(ipage, 1);
707 truncate_page = true;
708 goto out;
709 }
710
711 set_new_dnode(&dn, inode, ipage, NULL, 0);
712 err = f2fs_get_dnode_of_data(&dn, free_from, LOOKUP_NODE_RA);
713 if (err) {
714 if (err == -ENOENT)
715 goto free_next;
716 goto out;
717 }
718
719 count = ADDRS_PER_PAGE(dn.node_page, inode);
720
721 count -= dn.ofs_in_node;
722 f2fs_bug_on(sbi, count < 0);
723
724 if (dn.ofs_in_node || IS_INODE(dn.node_page)) {
725 f2fs_truncate_data_blocks_range(&dn, count);
726 free_from += count;
727 }
728
729 f2fs_put_dnode(&dn);
730 free_next:
731 err = f2fs_truncate_inode_blocks(inode, free_from);
732 out:
733 if (lock)
734 f2fs_unlock_op(sbi);
735 free_partial:
736 /* lastly zero out the first data page */
737 if (!err)
738 err = truncate_partial_data_page(inode, from, truncate_page);
739
740 trace_f2fs_truncate_blocks_exit(inode, err);
741 return err;
742 }
743
f2fs_truncate_blocks(struct inode * inode,u64 from,bool lock)744 int f2fs_truncate_blocks(struct inode *inode, u64 from, bool lock)
745 {
746 u64 free_from = from;
747 int err;
748
749 #ifdef CONFIG_F2FS_FS_COMPRESSION
750 /*
751 * for compressed file, only support cluster size
752 * aligned truncation.
753 */
754 if (f2fs_compressed_file(inode))
755 free_from = round_up(from,
756 F2FS_I(inode)->i_cluster_size << PAGE_SHIFT);
757 #endif
758
759 err = f2fs_do_truncate_blocks(inode, free_from, lock);
760 if (err)
761 return err;
762
763 #ifdef CONFIG_F2FS_FS_COMPRESSION
764 /*
765 * For compressed file, after release compress blocks, don't allow write
766 * direct, but we should allow write direct after truncate to zero.
767 */
768 if (f2fs_compressed_file(inode) && !free_from
769 && is_inode_flag_set(inode, FI_COMPRESS_RELEASED))
770 clear_inode_flag(inode, FI_COMPRESS_RELEASED);
771
772 if (from != free_from) {
773 err = f2fs_truncate_partial_cluster(inode, from, lock);
774 if (err)
775 return err;
776 }
777 #endif
778
779 return 0;
780 }
781
f2fs_truncate(struct inode * inode)782 int f2fs_truncate(struct inode *inode)
783 {
784 int err;
785
786 if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
787 return -EIO;
788
789 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
790 S_ISLNK(inode->i_mode)))
791 return 0;
792
793 trace_f2fs_truncate(inode);
794
795 if (time_to_inject(F2FS_I_SB(inode), FAULT_TRUNCATE))
796 return -EIO;
797
798 err = f2fs_dquot_initialize(inode);
799 if (err)
800 return err;
801
802 /* we should check inline_data size */
803 if (!f2fs_may_inline_data(inode)) {
804 err = f2fs_convert_inline_inode(inode);
805 if (err)
806 return err;
807 }
808
809 err = f2fs_truncate_blocks(inode, i_size_read(inode), true);
810 if (err)
811 return err;
812
813 inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode));
814 f2fs_mark_inode_dirty_sync(inode, false);
815 return 0;
816 }
817
f2fs_force_buffered_io(struct inode * inode,int rw)818 static bool f2fs_force_buffered_io(struct inode *inode, int rw)
819 {
820 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
821
822 if (!fscrypt_dio_supported(inode))
823 return true;
824 if (fsverity_active(inode))
825 return true;
826 if (f2fs_compressed_file(inode))
827 return true;
828
829 /* disallow direct IO if any of devices has unaligned blksize */
830 if (f2fs_is_multi_device(sbi) && !sbi->aligned_blksize)
831 return true;
832 /*
833 * for blkzoned device, fallback direct IO to buffered IO, so
834 * all IOs can be serialized by log-structured write.
835 */
836 if (f2fs_sb_has_blkzoned(sbi) && (rw == WRITE) &&
837 !f2fs_is_pinned_file(inode))
838 return true;
839 if (is_sbi_flag_set(sbi, SBI_CP_DISABLED))
840 return true;
841
842 return false;
843 }
844
f2fs_getattr(struct mnt_idmap * idmap,const struct path * path,struct kstat * stat,u32 request_mask,unsigned int query_flags)845 int f2fs_getattr(struct mnt_idmap *idmap, const struct path *path,
846 struct kstat *stat, u32 request_mask, unsigned int query_flags)
847 {
848 struct inode *inode = d_inode(path->dentry);
849 struct f2fs_inode_info *fi = F2FS_I(inode);
850 struct f2fs_inode *ri = NULL;
851 unsigned int flags;
852
853 if (f2fs_has_extra_attr(inode) &&
854 f2fs_sb_has_inode_crtime(F2FS_I_SB(inode)) &&
855 F2FS_FITS_IN_INODE(ri, fi->i_extra_isize, i_crtime)) {
856 stat->result_mask |= STATX_BTIME;
857 stat->btime.tv_sec = fi->i_crtime.tv_sec;
858 stat->btime.tv_nsec = fi->i_crtime.tv_nsec;
859 }
860
861 /*
862 * Return the DIO alignment restrictions if requested. We only return
863 * this information when requested, since on encrypted files it might
864 * take a fair bit of work to get if the file wasn't opened recently.
865 *
866 * f2fs sometimes supports DIO reads but not DIO writes. STATX_DIOALIGN
867 * cannot represent that, so in that case we report no DIO support.
868 */
869 if ((request_mask & STATX_DIOALIGN) && S_ISREG(inode->i_mode)) {
870 unsigned int bsize = i_blocksize(inode);
871
872 stat->result_mask |= STATX_DIOALIGN;
873 if (!f2fs_force_buffered_io(inode, WRITE)) {
874 stat->dio_mem_align = bsize;
875 stat->dio_offset_align = bsize;
876 }
877 }
878
879 flags = fi->i_flags;
880 if (flags & F2FS_COMPR_FL)
881 stat->attributes |= STATX_ATTR_COMPRESSED;
882 if (flags & F2FS_APPEND_FL)
883 stat->attributes |= STATX_ATTR_APPEND;
884 if (IS_ENCRYPTED(inode))
885 stat->attributes |= STATX_ATTR_ENCRYPTED;
886 if (flags & F2FS_IMMUTABLE_FL)
887 stat->attributes |= STATX_ATTR_IMMUTABLE;
888 if (flags & F2FS_NODUMP_FL)
889 stat->attributes |= STATX_ATTR_NODUMP;
890 if (IS_VERITY(inode))
891 stat->attributes |= STATX_ATTR_VERITY;
892
893 stat->attributes_mask |= (STATX_ATTR_COMPRESSED |
894 STATX_ATTR_APPEND |
895 STATX_ATTR_ENCRYPTED |
896 STATX_ATTR_IMMUTABLE |
897 STATX_ATTR_NODUMP |
898 STATX_ATTR_VERITY);
899
900 generic_fillattr(idmap, request_mask, inode, stat);
901
902 /* we need to show initial sectors used for inline_data/dentries */
903 if ((S_ISREG(inode->i_mode) && f2fs_has_inline_data(inode)) ||
904 f2fs_has_inline_dentry(inode))
905 stat->blocks += (stat->size + 511) >> 9;
906
907 return 0;
908 }
909
910 #ifdef CONFIG_F2FS_FS_POSIX_ACL
__setattr_copy(struct mnt_idmap * idmap,struct inode * inode,const struct iattr * attr)911 static void __setattr_copy(struct mnt_idmap *idmap,
912 struct inode *inode, const struct iattr *attr)
913 {
914 unsigned int ia_valid = attr->ia_valid;
915
916 i_uid_update(idmap, attr, inode);
917 i_gid_update(idmap, attr, inode);
918 if (ia_valid & ATTR_ATIME)
919 inode_set_atime_to_ts(inode, attr->ia_atime);
920 if (ia_valid & ATTR_MTIME)
921 inode_set_mtime_to_ts(inode, attr->ia_mtime);
922 if (ia_valid & ATTR_CTIME)
923 inode_set_ctime_to_ts(inode, attr->ia_ctime);
924 if (ia_valid & ATTR_MODE) {
925 umode_t mode = attr->ia_mode;
926 vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode);
927
928 if (!vfsgid_in_group_p(vfsgid) &&
929 !capable_wrt_inode_uidgid(idmap, inode, CAP_FSETID))
930 mode &= ~S_ISGID;
931 set_acl_inode(inode, mode);
932 }
933 }
934 #else
935 #define __setattr_copy setattr_copy
936 #endif
937
f2fs_setattr(struct mnt_idmap * idmap,struct dentry * dentry,struct iattr * attr)938 int f2fs_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
939 struct iattr *attr)
940 {
941 struct inode *inode = d_inode(dentry);
942 int err;
943
944 if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
945 return -EIO;
946
947 if (unlikely(IS_IMMUTABLE(inode)))
948 return -EPERM;
949
950 if (unlikely(IS_APPEND(inode) &&
951 (attr->ia_valid & (ATTR_MODE | ATTR_UID |
952 ATTR_GID | ATTR_TIMES_SET))))
953 return -EPERM;
954
955 if ((attr->ia_valid & ATTR_SIZE)) {
956 if (!f2fs_is_compress_backend_ready(inode))
957 return -EOPNOTSUPP;
958 if (is_inode_flag_set(inode, FI_COMPRESS_RELEASED) &&
959 !IS_ALIGNED(attr->ia_size,
960 F2FS_BLK_TO_BYTES(F2FS_I(inode)->i_cluster_size)))
961 return -EINVAL;
962 }
963
964 err = setattr_prepare(idmap, dentry, attr);
965 if (err)
966 return err;
967
968 err = fscrypt_prepare_setattr(dentry, attr);
969 if (err)
970 return err;
971
972 err = fsverity_prepare_setattr(dentry, attr);
973 if (err)
974 return err;
975
976 if (is_quota_modification(idmap, inode, attr)) {
977 err = f2fs_dquot_initialize(inode);
978 if (err)
979 return err;
980 }
981 if (i_uid_needs_update(idmap, attr, inode) ||
982 i_gid_needs_update(idmap, attr, inode)) {
983 f2fs_lock_op(F2FS_I_SB(inode));
984 err = dquot_transfer(idmap, inode, attr);
985 if (err) {
986 set_sbi_flag(F2FS_I_SB(inode),
987 SBI_QUOTA_NEED_REPAIR);
988 f2fs_unlock_op(F2FS_I_SB(inode));
989 return err;
990 }
991 /*
992 * update uid/gid under lock_op(), so that dquot and inode can
993 * be updated atomically.
994 */
995 i_uid_update(idmap, attr, inode);
996 i_gid_update(idmap, attr, inode);
997 f2fs_mark_inode_dirty_sync(inode, true);
998 f2fs_unlock_op(F2FS_I_SB(inode));
999 }
1000
1001 if (attr->ia_valid & ATTR_SIZE) {
1002 loff_t old_size = i_size_read(inode);
1003
1004 if (attr->ia_size > MAX_INLINE_DATA(inode)) {
1005 /*
1006 * should convert inline inode before i_size_write to
1007 * keep smaller than inline_data size with inline flag.
1008 */
1009 err = f2fs_convert_inline_inode(inode);
1010 if (err)
1011 return err;
1012 }
1013
1014 f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
1015 filemap_invalidate_lock(inode->i_mapping);
1016
1017 truncate_setsize(inode, attr->ia_size);
1018
1019 if (attr->ia_size <= old_size)
1020 err = f2fs_truncate(inode);
1021 /*
1022 * do not trim all blocks after i_size if target size is
1023 * larger than i_size.
1024 */
1025 filemap_invalidate_unlock(inode->i_mapping);
1026 f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
1027 if (err)
1028 return err;
1029
1030 spin_lock(&F2FS_I(inode)->i_size_lock);
1031 inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode));
1032 F2FS_I(inode)->last_disk_size = i_size_read(inode);
1033 spin_unlock(&F2FS_I(inode)->i_size_lock);
1034 }
1035
1036 __setattr_copy(idmap, inode, attr);
1037
1038 if (attr->ia_valid & ATTR_MODE) {
1039 err = posix_acl_chmod(idmap, dentry, f2fs_get_inode_mode(inode));
1040
1041 if (is_inode_flag_set(inode, FI_ACL_MODE)) {
1042 if (!err)
1043 inode->i_mode = F2FS_I(inode)->i_acl_mode;
1044 clear_inode_flag(inode, FI_ACL_MODE);
1045 }
1046 }
1047
1048 /* file size may changed here */
1049 f2fs_mark_inode_dirty_sync(inode, true);
1050
1051 /* inode change will produce dirty node pages flushed by checkpoint */
1052 f2fs_balance_fs(F2FS_I_SB(inode), true);
1053
1054 return err;
1055 }
1056
1057 const struct inode_operations f2fs_file_inode_operations = {
1058 .getattr = f2fs_getattr,
1059 .setattr = f2fs_setattr,
1060 .get_inode_acl = f2fs_get_acl,
1061 .set_acl = f2fs_set_acl,
1062 .listxattr = f2fs_listxattr,
1063 .fiemap = f2fs_fiemap,
1064 .fileattr_get = f2fs_fileattr_get,
1065 .fileattr_set = f2fs_fileattr_set,
1066 };
1067
fill_zero(struct inode * inode,pgoff_t index,loff_t start,loff_t len)1068 static int fill_zero(struct inode *inode, pgoff_t index,
1069 loff_t start, loff_t len)
1070 {
1071 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1072 struct page *page;
1073
1074 if (!len)
1075 return 0;
1076
1077 f2fs_balance_fs(sbi, true);
1078
1079 f2fs_lock_op(sbi);
1080 page = f2fs_get_new_data_page(inode, NULL, index, false);
1081 f2fs_unlock_op(sbi);
1082
1083 if (IS_ERR(page))
1084 return PTR_ERR(page);
1085
1086 f2fs_wait_on_page_writeback(page, DATA, true, true);
1087 zero_user(page, start, len);
1088 set_page_dirty(page);
1089 f2fs_put_page(page, 1);
1090 return 0;
1091 }
1092
f2fs_truncate_hole(struct inode * inode,pgoff_t pg_start,pgoff_t pg_end)1093 int f2fs_truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end)
1094 {
1095 int err;
1096
1097 while (pg_start < pg_end) {
1098 struct dnode_of_data dn;
1099 pgoff_t end_offset, count;
1100
1101 set_new_dnode(&dn, inode, NULL, NULL, 0);
1102 err = f2fs_get_dnode_of_data(&dn, pg_start, LOOKUP_NODE);
1103 if (err) {
1104 if (err == -ENOENT) {
1105 pg_start = f2fs_get_next_page_offset(&dn,
1106 pg_start);
1107 continue;
1108 }
1109 return err;
1110 }
1111
1112 end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
1113 count = min(end_offset - dn.ofs_in_node, pg_end - pg_start);
1114
1115 f2fs_bug_on(F2FS_I_SB(inode), count == 0 || count > end_offset);
1116
1117 f2fs_truncate_data_blocks_range(&dn, count);
1118 f2fs_put_dnode(&dn);
1119
1120 pg_start += count;
1121 }
1122 return 0;
1123 }
1124
f2fs_punch_hole(struct inode * inode,loff_t offset,loff_t len)1125 static int f2fs_punch_hole(struct inode *inode, loff_t offset, loff_t len)
1126 {
1127 pgoff_t pg_start, pg_end;
1128 loff_t off_start, off_end;
1129 int ret;
1130
1131 ret = f2fs_convert_inline_inode(inode);
1132 if (ret)
1133 return ret;
1134
1135 pg_start = ((unsigned long long) offset) >> PAGE_SHIFT;
1136 pg_end = ((unsigned long long) offset + len) >> PAGE_SHIFT;
1137
1138 off_start = offset & (PAGE_SIZE - 1);
1139 off_end = (offset + len) & (PAGE_SIZE - 1);
1140
1141 if (pg_start == pg_end) {
1142 ret = fill_zero(inode, pg_start, off_start,
1143 off_end - off_start);
1144 if (ret)
1145 return ret;
1146 } else {
1147 if (off_start) {
1148 ret = fill_zero(inode, pg_start++, off_start,
1149 PAGE_SIZE - off_start);
1150 if (ret)
1151 return ret;
1152 }
1153 if (off_end) {
1154 ret = fill_zero(inode, pg_end, 0, off_end);
1155 if (ret)
1156 return ret;
1157 }
1158
1159 if (pg_start < pg_end) {
1160 loff_t blk_start, blk_end;
1161 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1162
1163 f2fs_balance_fs(sbi, true);
1164
1165 blk_start = (loff_t)pg_start << PAGE_SHIFT;
1166 blk_end = (loff_t)pg_end << PAGE_SHIFT;
1167
1168 f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
1169 filemap_invalidate_lock(inode->i_mapping);
1170
1171 truncate_pagecache_range(inode, blk_start, blk_end - 1);
1172
1173 f2fs_lock_op(sbi);
1174 ret = f2fs_truncate_hole(inode, pg_start, pg_end);
1175 f2fs_unlock_op(sbi);
1176
1177 filemap_invalidate_unlock(inode->i_mapping);
1178 f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
1179 }
1180 }
1181
1182 return ret;
1183 }
1184
__read_out_blkaddrs(struct inode * inode,block_t * blkaddr,int * do_replace,pgoff_t off,pgoff_t len)1185 static int __read_out_blkaddrs(struct inode *inode, block_t *blkaddr,
1186 int *do_replace, pgoff_t off, pgoff_t len)
1187 {
1188 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1189 struct dnode_of_data dn;
1190 int ret, done, i;
1191
1192 next_dnode:
1193 set_new_dnode(&dn, inode, NULL, NULL, 0);
1194 ret = f2fs_get_dnode_of_data(&dn, off, LOOKUP_NODE_RA);
1195 if (ret && ret != -ENOENT) {
1196 return ret;
1197 } else if (ret == -ENOENT) {
1198 if (dn.max_level == 0)
1199 return -ENOENT;
1200 done = min((pgoff_t)ADDRS_PER_BLOCK(inode) -
1201 dn.ofs_in_node, len);
1202 blkaddr += done;
1203 do_replace += done;
1204 goto next;
1205 }
1206
1207 done = min((pgoff_t)ADDRS_PER_PAGE(dn.node_page, inode) -
1208 dn.ofs_in_node, len);
1209 for (i = 0; i < done; i++, blkaddr++, do_replace++, dn.ofs_in_node++) {
1210 *blkaddr = f2fs_data_blkaddr(&dn);
1211
1212 if (__is_valid_data_blkaddr(*blkaddr) &&
1213 !f2fs_is_valid_blkaddr(sbi, *blkaddr,
1214 DATA_GENERIC_ENHANCE)) {
1215 f2fs_put_dnode(&dn);
1216 return -EFSCORRUPTED;
1217 }
1218
1219 if (!f2fs_is_checkpointed_data(sbi, *blkaddr)) {
1220
1221 if (f2fs_lfs_mode(sbi)) {
1222 f2fs_put_dnode(&dn);
1223 return -EOPNOTSUPP;
1224 }
1225
1226 /* do not invalidate this block address */
1227 f2fs_update_data_blkaddr(&dn, NULL_ADDR);
1228 *do_replace = 1;
1229 }
1230 }
1231 f2fs_put_dnode(&dn);
1232 next:
1233 len -= done;
1234 off += done;
1235 if (len)
1236 goto next_dnode;
1237 return 0;
1238 }
1239
__roll_back_blkaddrs(struct inode * inode,block_t * blkaddr,int * do_replace,pgoff_t off,int len)1240 static int __roll_back_blkaddrs(struct inode *inode, block_t *blkaddr,
1241 int *do_replace, pgoff_t off, int len)
1242 {
1243 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1244 struct dnode_of_data dn;
1245 int ret, i;
1246
1247 for (i = 0; i < len; i++, do_replace++, blkaddr++) {
1248 if (*do_replace == 0)
1249 continue;
1250
1251 set_new_dnode(&dn, inode, NULL, NULL, 0);
1252 ret = f2fs_get_dnode_of_data(&dn, off + i, LOOKUP_NODE_RA);
1253 if (ret) {
1254 dec_valid_block_count(sbi, inode, 1);
1255 f2fs_invalidate_blocks(sbi, *blkaddr);
1256 } else {
1257 f2fs_update_data_blkaddr(&dn, *blkaddr);
1258 }
1259 f2fs_put_dnode(&dn);
1260 }
1261 return 0;
1262 }
1263
__clone_blkaddrs(struct inode * src_inode,struct inode * dst_inode,block_t * blkaddr,int * do_replace,pgoff_t src,pgoff_t dst,pgoff_t len,bool full)1264 static int __clone_blkaddrs(struct inode *src_inode, struct inode *dst_inode,
1265 block_t *blkaddr, int *do_replace,
1266 pgoff_t src, pgoff_t dst, pgoff_t len, bool full)
1267 {
1268 struct f2fs_sb_info *sbi = F2FS_I_SB(src_inode);
1269 pgoff_t i = 0;
1270 int ret;
1271
1272 while (i < len) {
1273 if (blkaddr[i] == NULL_ADDR && !full) {
1274 i++;
1275 continue;
1276 }
1277
1278 if (do_replace[i] || blkaddr[i] == NULL_ADDR) {
1279 struct dnode_of_data dn;
1280 struct node_info ni;
1281 size_t new_size;
1282 pgoff_t ilen;
1283
1284 set_new_dnode(&dn, dst_inode, NULL, NULL, 0);
1285 ret = f2fs_get_dnode_of_data(&dn, dst + i, ALLOC_NODE);
1286 if (ret)
1287 return ret;
1288
1289 ret = f2fs_get_node_info(sbi, dn.nid, &ni, false);
1290 if (ret) {
1291 f2fs_put_dnode(&dn);
1292 return ret;
1293 }
1294
1295 ilen = min((pgoff_t)
1296 ADDRS_PER_PAGE(dn.node_page, dst_inode) -
1297 dn.ofs_in_node, len - i);
1298 do {
1299 dn.data_blkaddr = f2fs_data_blkaddr(&dn);
1300 f2fs_truncate_data_blocks_range(&dn, 1);
1301
1302 if (do_replace[i]) {
1303 f2fs_i_blocks_write(src_inode,
1304 1, false, false);
1305 f2fs_i_blocks_write(dst_inode,
1306 1, true, false);
1307 f2fs_replace_block(sbi, &dn, dn.data_blkaddr,
1308 blkaddr[i], ni.version, true, false);
1309
1310 do_replace[i] = 0;
1311 }
1312 dn.ofs_in_node++;
1313 i++;
1314 new_size = (loff_t)(dst + i) << PAGE_SHIFT;
1315 if (dst_inode->i_size < new_size)
1316 f2fs_i_size_write(dst_inode, new_size);
1317 } while (--ilen && (do_replace[i] || blkaddr[i] == NULL_ADDR));
1318
1319 f2fs_put_dnode(&dn);
1320 } else {
1321 struct page *psrc, *pdst;
1322
1323 psrc = f2fs_get_lock_data_page(src_inode,
1324 src + i, true);
1325 if (IS_ERR(psrc))
1326 return PTR_ERR(psrc);
1327 pdst = f2fs_get_new_data_page(dst_inode, NULL, dst + i,
1328 true);
1329 if (IS_ERR(pdst)) {
1330 f2fs_put_page(psrc, 1);
1331 return PTR_ERR(pdst);
1332 }
1333
1334 f2fs_wait_on_page_writeback(pdst, DATA, true, true);
1335
1336 memcpy_page(pdst, 0, psrc, 0, PAGE_SIZE);
1337 set_page_dirty(pdst);
1338 set_page_private_gcing(pdst);
1339 f2fs_put_page(pdst, 1);
1340 f2fs_put_page(psrc, 1);
1341
1342 ret = f2fs_truncate_hole(src_inode,
1343 src + i, src + i + 1);
1344 if (ret)
1345 return ret;
1346 i++;
1347 }
1348 }
1349 return 0;
1350 }
1351
__exchange_data_block(struct inode * src_inode,struct inode * dst_inode,pgoff_t src,pgoff_t dst,pgoff_t len,bool full)1352 static int __exchange_data_block(struct inode *src_inode,
1353 struct inode *dst_inode, pgoff_t src, pgoff_t dst,
1354 pgoff_t len, bool full)
1355 {
1356 block_t *src_blkaddr;
1357 int *do_replace;
1358 pgoff_t olen;
1359 int ret;
1360
1361 while (len) {
1362 olen = min((pgoff_t)4 * ADDRS_PER_BLOCK(src_inode), len);
1363
1364 src_blkaddr = f2fs_kvzalloc(F2FS_I_SB(src_inode),
1365 array_size(olen, sizeof(block_t)),
1366 GFP_NOFS);
1367 if (!src_blkaddr)
1368 return -ENOMEM;
1369
1370 do_replace = f2fs_kvzalloc(F2FS_I_SB(src_inode),
1371 array_size(olen, sizeof(int)),
1372 GFP_NOFS);
1373 if (!do_replace) {
1374 kvfree(src_blkaddr);
1375 return -ENOMEM;
1376 }
1377
1378 ret = __read_out_blkaddrs(src_inode, src_blkaddr,
1379 do_replace, src, olen);
1380 if (ret)
1381 goto roll_back;
1382
1383 ret = __clone_blkaddrs(src_inode, dst_inode, src_blkaddr,
1384 do_replace, src, dst, olen, full);
1385 if (ret)
1386 goto roll_back;
1387
1388 src += olen;
1389 dst += olen;
1390 len -= olen;
1391
1392 kvfree(src_blkaddr);
1393 kvfree(do_replace);
1394 }
1395 return 0;
1396
1397 roll_back:
1398 __roll_back_blkaddrs(src_inode, src_blkaddr, do_replace, src, olen);
1399 kvfree(src_blkaddr);
1400 kvfree(do_replace);
1401 return ret;
1402 }
1403
f2fs_do_collapse(struct inode * inode,loff_t offset,loff_t len)1404 static int f2fs_do_collapse(struct inode *inode, loff_t offset, loff_t len)
1405 {
1406 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1407 pgoff_t nrpages = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE);
1408 pgoff_t start = offset >> PAGE_SHIFT;
1409 pgoff_t end = (offset + len) >> PAGE_SHIFT;
1410 int ret;
1411
1412 f2fs_balance_fs(sbi, true);
1413
1414 /* avoid gc operation during block exchange */
1415 f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
1416 filemap_invalidate_lock(inode->i_mapping);
1417
1418 f2fs_lock_op(sbi);
1419 f2fs_drop_extent_tree(inode);
1420 truncate_pagecache(inode, offset);
1421 ret = __exchange_data_block(inode, inode, end, start, nrpages - end, true);
1422 f2fs_unlock_op(sbi);
1423
1424 filemap_invalidate_unlock(inode->i_mapping);
1425 f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
1426 return ret;
1427 }
1428
f2fs_collapse_range(struct inode * inode,loff_t offset,loff_t len)1429 static int f2fs_collapse_range(struct inode *inode, loff_t offset, loff_t len)
1430 {
1431 loff_t new_size;
1432 int ret;
1433
1434 if (offset + len >= i_size_read(inode))
1435 return -EINVAL;
1436
1437 /* collapse range should be aligned to block size of f2fs. */
1438 if (offset & (F2FS_BLKSIZE - 1) || len & (F2FS_BLKSIZE - 1))
1439 return -EINVAL;
1440
1441 ret = f2fs_convert_inline_inode(inode);
1442 if (ret)
1443 return ret;
1444
1445 /* write out all dirty pages from offset */
1446 ret = filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX);
1447 if (ret)
1448 return ret;
1449
1450 ret = f2fs_do_collapse(inode, offset, len);
1451 if (ret)
1452 return ret;
1453
1454 /* write out all moved pages, if possible */
1455 filemap_invalidate_lock(inode->i_mapping);
1456 filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX);
1457 truncate_pagecache(inode, offset);
1458
1459 new_size = i_size_read(inode) - len;
1460 ret = f2fs_truncate_blocks(inode, new_size, true);
1461 filemap_invalidate_unlock(inode->i_mapping);
1462 if (!ret)
1463 f2fs_i_size_write(inode, new_size);
1464 return ret;
1465 }
1466
f2fs_do_zero_range(struct dnode_of_data * dn,pgoff_t start,pgoff_t end)1467 static int f2fs_do_zero_range(struct dnode_of_data *dn, pgoff_t start,
1468 pgoff_t end)
1469 {
1470 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
1471 pgoff_t index = start;
1472 unsigned int ofs_in_node = dn->ofs_in_node;
1473 blkcnt_t count = 0;
1474 int ret;
1475
1476 for (; index < end; index++, dn->ofs_in_node++) {
1477 if (f2fs_data_blkaddr(dn) == NULL_ADDR)
1478 count++;
1479 }
1480
1481 dn->ofs_in_node = ofs_in_node;
1482 ret = f2fs_reserve_new_blocks(dn, count);
1483 if (ret)
1484 return ret;
1485
1486 dn->ofs_in_node = ofs_in_node;
1487 for (index = start; index < end; index++, dn->ofs_in_node++) {
1488 dn->data_blkaddr = f2fs_data_blkaddr(dn);
1489 /*
1490 * f2fs_reserve_new_blocks will not guarantee entire block
1491 * allocation.
1492 */
1493 if (dn->data_blkaddr == NULL_ADDR) {
1494 ret = -ENOSPC;
1495 break;
1496 }
1497
1498 if (dn->data_blkaddr == NEW_ADDR)
1499 continue;
1500
1501 if (!f2fs_is_valid_blkaddr(sbi, dn->data_blkaddr,
1502 DATA_GENERIC_ENHANCE)) {
1503 ret = -EFSCORRUPTED;
1504 break;
1505 }
1506
1507 f2fs_invalidate_blocks(sbi, dn->data_blkaddr);
1508 f2fs_set_data_blkaddr(dn, NEW_ADDR);
1509 }
1510
1511 f2fs_update_read_extent_cache_range(dn, start, 0, index - start);
1512 f2fs_update_age_extent_cache_range(dn, start, index - start);
1513
1514 return ret;
1515 }
1516
f2fs_zero_range(struct inode * inode,loff_t offset,loff_t len,int mode)1517 static int f2fs_zero_range(struct inode *inode, loff_t offset, loff_t len,
1518 int mode)
1519 {
1520 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1521 struct address_space *mapping = inode->i_mapping;
1522 pgoff_t index, pg_start, pg_end;
1523 loff_t new_size = i_size_read(inode);
1524 loff_t off_start, off_end;
1525 int ret = 0;
1526
1527 ret = inode_newsize_ok(inode, (len + offset));
1528 if (ret)
1529 return ret;
1530
1531 ret = f2fs_convert_inline_inode(inode);
1532 if (ret)
1533 return ret;
1534
1535 ret = filemap_write_and_wait_range(mapping, offset, offset + len - 1);
1536 if (ret)
1537 return ret;
1538
1539 pg_start = ((unsigned long long) offset) >> PAGE_SHIFT;
1540 pg_end = ((unsigned long long) offset + len) >> PAGE_SHIFT;
1541
1542 off_start = offset & (PAGE_SIZE - 1);
1543 off_end = (offset + len) & (PAGE_SIZE - 1);
1544
1545 if (pg_start == pg_end) {
1546 ret = fill_zero(inode, pg_start, off_start,
1547 off_end - off_start);
1548 if (ret)
1549 return ret;
1550
1551 new_size = max_t(loff_t, new_size, offset + len);
1552 } else {
1553 if (off_start) {
1554 ret = fill_zero(inode, pg_start++, off_start,
1555 PAGE_SIZE - off_start);
1556 if (ret)
1557 return ret;
1558
1559 new_size = max_t(loff_t, new_size,
1560 (loff_t)pg_start << PAGE_SHIFT);
1561 }
1562
1563 for (index = pg_start; index < pg_end;) {
1564 struct dnode_of_data dn;
1565 unsigned int end_offset;
1566 pgoff_t end;
1567
1568 f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
1569 filemap_invalidate_lock(mapping);
1570
1571 truncate_pagecache_range(inode,
1572 (loff_t)index << PAGE_SHIFT,
1573 ((loff_t)pg_end << PAGE_SHIFT) - 1);
1574
1575 f2fs_lock_op(sbi);
1576
1577 set_new_dnode(&dn, inode, NULL, NULL, 0);
1578 ret = f2fs_get_dnode_of_data(&dn, index, ALLOC_NODE);
1579 if (ret) {
1580 f2fs_unlock_op(sbi);
1581 filemap_invalidate_unlock(mapping);
1582 f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
1583 goto out;
1584 }
1585
1586 end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
1587 end = min(pg_end, end_offset - dn.ofs_in_node + index);
1588
1589 ret = f2fs_do_zero_range(&dn, index, end);
1590 f2fs_put_dnode(&dn);
1591
1592 f2fs_unlock_op(sbi);
1593 filemap_invalidate_unlock(mapping);
1594 f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
1595
1596 f2fs_balance_fs(sbi, dn.node_changed);
1597
1598 if (ret)
1599 goto out;
1600
1601 index = end;
1602 new_size = max_t(loff_t, new_size,
1603 (loff_t)index << PAGE_SHIFT);
1604 }
1605
1606 if (off_end) {
1607 ret = fill_zero(inode, pg_end, 0, off_end);
1608 if (ret)
1609 goto out;
1610
1611 new_size = max_t(loff_t, new_size, offset + len);
1612 }
1613 }
1614
1615 out:
1616 if (new_size > i_size_read(inode)) {
1617 if (mode & FALLOC_FL_KEEP_SIZE)
1618 file_set_keep_isize(inode);
1619 else
1620 f2fs_i_size_write(inode, new_size);
1621 }
1622 return ret;
1623 }
1624
f2fs_insert_range(struct inode * inode,loff_t offset,loff_t len)1625 static int f2fs_insert_range(struct inode *inode, loff_t offset, loff_t len)
1626 {
1627 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1628 struct address_space *mapping = inode->i_mapping;
1629 pgoff_t nr, pg_start, pg_end, delta, idx;
1630 loff_t new_size;
1631 int ret = 0;
1632
1633 new_size = i_size_read(inode) + len;
1634 ret = inode_newsize_ok(inode, new_size);
1635 if (ret)
1636 return ret;
1637
1638 if (offset >= i_size_read(inode))
1639 return -EINVAL;
1640
1641 /* insert range should be aligned to block size of f2fs. */
1642 if (offset & (F2FS_BLKSIZE - 1) || len & (F2FS_BLKSIZE - 1))
1643 return -EINVAL;
1644
1645 ret = f2fs_convert_inline_inode(inode);
1646 if (ret)
1647 return ret;
1648
1649 f2fs_balance_fs(sbi, true);
1650
1651 filemap_invalidate_lock(mapping);
1652 ret = f2fs_truncate_blocks(inode, i_size_read(inode), true);
1653 filemap_invalidate_unlock(mapping);
1654 if (ret)
1655 return ret;
1656
1657 /* write out all dirty pages from offset */
1658 ret = filemap_write_and_wait_range(mapping, offset, LLONG_MAX);
1659 if (ret)
1660 return ret;
1661
1662 pg_start = offset >> PAGE_SHIFT;
1663 pg_end = (offset + len) >> PAGE_SHIFT;
1664 delta = pg_end - pg_start;
1665 idx = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE);
1666
1667 /* avoid gc operation during block exchange */
1668 f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
1669 filemap_invalidate_lock(mapping);
1670 truncate_pagecache(inode, offset);
1671
1672 while (!ret && idx > pg_start) {
1673 nr = idx - pg_start;
1674 if (nr > delta)
1675 nr = delta;
1676 idx -= nr;
1677
1678 f2fs_lock_op(sbi);
1679 f2fs_drop_extent_tree(inode);
1680
1681 ret = __exchange_data_block(inode, inode, idx,
1682 idx + delta, nr, false);
1683 f2fs_unlock_op(sbi);
1684 }
1685 filemap_invalidate_unlock(mapping);
1686 f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
1687 if (ret)
1688 return ret;
1689
1690 /* write out all moved pages, if possible */
1691 filemap_invalidate_lock(mapping);
1692 ret = filemap_write_and_wait_range(mapping, offset, LLONG_MAX);
1693 truncate_pagecache(inode, offset);
1694 filemap_invalidate_unlock(mapping);
1695
1696 if (!ret)
1697 f2fs_i_size_write(inode, new_size);
1698 return ret;
1699 }
1700
f2fs_expand_inode_data(struct inode * inode,loff_t offset,loff_t len,int mode)1701 static int f2fs_expand_inode_data(struct inode *inode, loff_t offset,
1702 loff_t len, int mode)
1703 {
1704 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1705 struct f2fs_map_blocks map = { .m_next_pgofs = NULL,
1706 .m_next_extent = NULL, .m_seg_type = NO_CHECK_TYPE,
1707 .m_may_create = true };
1708 struct f2fs_gc_control gc_control = { .victim_segno = NULL_SEGNO,
1709 .init_gc_type = FG_GC,
1710 .should_migrate_blocks = false,
1711 .err_gc_skipped = true,
1712 .nr_free_secs = 0 };
1713 pgoff_t pg_start, pg_end;
1714 loff_t new_size;
1715 loff_t off_end;
1716 block_t expanded = 0;
1717 int err;
1718
1719 err = inode_newsize_ok(inode, (len + offset));
1720 if (err)
1721 return err;
1722
1723 err = f2fs_convert_inline_inode(inode);
1724 if (err)
1725 return err;
1726
1727 f2fs_balance_fs(sbi, true);
1728
1729 pg_start = ((unsigned long long)offset) >> PAGE_SHIFT;
1730 pg_end = ((unsigned long long)offset + len) >> PAGE_SHIFT;
1731 off_end = (offset + len) & (PAGE_SIZE - 1);
1732
1733 map.m_lblk = pg_start;
1734 map.m_len = pg_end - pg_start;
1735 if (off_end)
1736 map.m_len++;
1737
1738 if (!map.m_len)
1739 return 0;
1740
1741 if (f2fs_is_pinned_file(inode)) {
1742 block_t sec_blks = CAP_BLKS_PER_SEC(sbi);
1743 block_t sec_len = roundup(map.m_len, sec_blks);
1744
1745 map.m_len = sec_blks;
1746 next_alloc:
1747 if (has_not_enough_free_secs(sbi, 0,
1748 GET_SEC_FROM_SEG(sbi, overprovision_segments(sbi)))) {
1749 f2fs_down_write(&sbi->gc_lock);
1750 stat_inc_gc_call_count(sbi, FOREGROUND);
1751 err = f2fs_gc(sbi, &gc_control);
1752 if (err && err != -ENODATA)
1753 goto out_err;
1754 }
1755
1756 f2fs_down_write(&sbi->pin_sem);
1757
1758 err = f2fs_allocate_pinning_section(sbi);
1759 if (err) {
1760 f2fs_up_write(&sbi->pin_sem);
1761 goto out_err;
1762 }
1763
1764 map.m_seg_type = CURSEG_COLD_DATA_PINNED;
1765 err = f2fs_map_blocks(inode, &map, F2FS_GET_BLOCK_PRE_DIO);
1766 file_dont_truncate(inode);
1767
1768 f2fs_up_write(&sbi->pin_sem);
1769
1770 expanded += map.m_len;
1771 sec_len -= map.m_len;
1772 map.m_lblk += map.m_len;
1773 if (!err && sec_len)
1774 goto next_alloc;
1775
1776 map.m_len = expanded;
1777 } else {
1778 err = f2fs_map_blocks(inode, &map, F2FS_GET_BLOCK_PRE_AIO);
1779 expanded = map.m_len;
1780 }
1781 out_err:
1782 if (err) {
1783 pgoff_t last_off;
1784
1785 if (!expanded)
1786 return err;
1787
1788 last_off = pg_start + expanded - 1;
1789
1790 /* update new size to the failed position */
1791 new_size = (last_off == pg_end) ? offset + len :
1792 (loff_t)(last_off + 1) << PAGE_SHIFT;
1793 } else {
1794 new_size = ((loff_t)pg_end << PAGE_SHIFT) + off_end;
1795 }
1796
1797 if (new_size > i_size_read(inode)) {
1798 if (mode & FALLOC_FL_KEEP_SIZE)
1799 file_set_keep_isize(inode);
1800 else
1801 f2fs_i_size_write(inode, new_size);
1802 }
1803
1804 return err;
1805 }
1806
f2fs_fallocate(struct file * file,int mode,loff_t offset,loff_t len)1807 static long f2fs_fallocate(struct file *file, int mode,
1808 loff_t offset, loff_t len)
1809 {
1810 struct inode *inode = file_inode(file);
1811 long ret = 0;
1812
1813 if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
1814 return -EIO;
1815 if (!f2fs_is_checkpoint_ready(F2FS_I_SB(inode)))
1816 return -ENOSPC;
1817 if (!f2fs_is_compress_backend_ready(inode))
1818 return -EOPNOTSUPP;
1819
1820 /* f2fs only support ->fallocate for regular file */
1821 if (!S_ISREG(inode->i_mode))
1822 return -EINVAL;
1823
1824 if (IS_ENCRYPTED(inode) &&
1825 (mode & (FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_INSERT_RANGE)))
1826 return -EOPNOTSUPP;
1827
1828 if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE |
1829 FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_ZERO_RANGE |
1830 FALLOC_FL_INSERT_RANGE))
1831 return -EOPNOTSUPP;
1832
1833 inode_lock(inode);
1834
1835 /*
1836 * Pinned file should not support partial truncation since the block
1837 * can be used by applications.
1838 */
1839 if ((f2fs_compressed_file(inode) || f2fs_is_pinned_file(inode)) &&
1840 (mode & (FALLOC_FL_PUNCH_HOLE | FALLOC_FL_COLLAPSE_RANGE |
1841 FALLOC_FL_ZERO_RANGE | FALLOC_FL_INSERT_RANGE))) {
1842 ret = -EOPNOTSUPP;
1843 goto out;
1844 }
1845
1846 ret = file_modified(file);
1847 if (ret)
1848 goto out;
1849
1850 if (mode & FALLOC_FL_PUNCH_HOLE) {
1851 if (offset >= inode->i_size)
1852 goto out;
1853
1854 ret = f2fs_punch_hole(inode, offset, len);
1855 } else if (mode & FALLOC_FL_COLLAPSE_RANGE) {
1856 ret = f2fs_collapse_range(inode, offset, len);
1857 } else if (mode & FALLOC_FL_ZERO_RANGE) {
1858 ret = f2fs_zero_range(inode, offset, len, mode);
1859 } else if (mode & FALLOC_FL_INSERT_RANGE) {
1860 ret = f2fs_insert_range(inode, offset, len);
1861 } else {
1862 ret = f2fs_expand_inode_data(inode, offset, len, mode);
1863 }
1864
1865 if (!ret) {
1866 inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode));
1867 f2fs_mark_inode_dirty_sync(inode, false);
1868 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
1869 }
1870
1871 out:
1872 inode_unlock(inode);
1873
1874 trace_f2fs_fallocate(inode, mode, offset, len, ret);
1875 return ret;
1876 }
1877
f2fs_release_file(struct inode * inode,struct file * filp)1878 static int f2fs_release_file(struct inode *inode, struct file *filp)
1879 {
1880 /*
1881 * f2fs_release_file is called at every close calls. So we should
1882 * not drop any inmemory pages by close called by other process.
1883 */
1884 if (!(filp->f_mode & FMODE_WRITE) ||
1885 atomic_read(&inode->i_writecount) != 1)
1886 return 0;
1887
1888 inode_lock(inode);
1889 f2fs_abort_atomic_write(inode, true);
1890 inode_unlock(inode);
1891
1892 return 0;
1893 }
1894
f2fs_file_flush(struct file * file,fl_owner_t id)1895 static int f2fs_file_flush(struct file *file, fl_owner_t id)
1896 {
1897 struct inode *inode = file_inode(file);
1898
1899 /*
1900 * If the process doing a transaction is crashed, we should do
1901 * roll-back. Otherwise, other reader/write can see corrupted database
1902 * until all the writers close its file. Since this should be done
1903 * before dropping file lock, it needs to do in ->flush.
1904 */
1905 if (F2FS_I(inode)->atomic_write_task == current &&
1906 (current->flags & PF_EXITING)) {
1907 inode_lock(inode);
1908 f2fs_abort_atomic_write(inode, true);
1909 inode_unlock(inode);
1910 }
1911
1912 return 0;
1913 }
1914
f2fs_setflags_common(struct inode * inode,u32 iflags,u32 mask)1915 static int f2fs_setflags_common(struct inode *inode, u32 iflags, u32 mask)
1916 {
1917 struct f2fs_inode_info *fi = F2FS_I(inode);
1918 u32 masked_flags = fi->i_flags & mask;
1919
1920 /* mask can be shrunk by flags_valid selector */
1921 iflags &= mask;
1922
1923 /* Is it quota file? Do not allow user to mess with it */
1924 if (IS_NOQUOTA(inode))
1925 return -EPERM;
1926
1927 if ((iflags ^ masked_flags) & F2FS_CASEFOLD_FL) {
1928 if (!f2fs_sb_has_casefold(F2FS_I_SB(inode)))
1929 return -EOPNOTSUPP;
1930 if (!f2fs_empty_dir(inode))
1931 return -ENOTEMPTY;
1932 }
1933
1934 if (iflags & (F2FS_COMPR_FL | F2FS_NOCOMP_FL)) {
1935 if (!f2fs_sb_has_compression(F2FS_I_SB(inode)))
1936 return -EOPNOTSUPP;
1937 if ((iflags & F2FS_COMPR_FL) && (iflags & F2FS_NOCOMP_FL))
1938 return -EINVAL;
1939 }
1940
1941 if ((iflags ^ masked_flags) & F2FS_COMPR_FL) {
1942 if (masked_flags & F2FS_COMPR_FL) {
1943 if (!f2fs_disable_compressed_file(inode))
1944 return -EINVAL;
1945 } else {
1946 /* try to convert inline_data to support compression */
1947 int err = f2fs_convert_inline_inode(inode);
1948 if (err)
1949 return err;
1950
1951 f2fs_down_write(&F2FS_I(inode)->i_sem);
1952 if (!f2fs_may_compress(inode) ||
1953 (S_ISREG(inode->i_mode) &&
1954 F2FS_HAS_BLOCKS(inode))) {
1955 f2fs_up_write(&F2FS_I(inode)->i_sem);
1956 return -EINVAL;
1957 }
1958 err = set_compress_context(inode);
1959 f2fs_up_write(&F2FS_I(inode)->i_sem);
1960
1961 if (err)
1962 return err;
1963 }
1964 }
1965
1966 fi->i_flags = iflags | (fi->i_flags & ~mask);
1967 f2fs_bug_on(F2FS_I_SB(inode), (fi->i_flags & F2FS_COMPR_FL) &&
1968 (fi->i_flags & F2FS_NOCOMP_FL));
1969
1970 if (fi->i_flags & F2FS_PROJINHERIT_FL)
1971 set_inode_flag(inode, FI_PROJ_INHERIT);
1972 else
1973 clear_inode_flag(inode, FI_PROJ_INHERIT);
1974
1975 inode_set_ctime_current(inode);
1976 f2fs_set_inode_flags(inode);
1977 f2fs_mark_inode_dirty_sync(inode, true);
1978 return 0;
1979 }
1980
1981 /* FS_IOC_[GS]ETFLAGS and FS_IOC_FS[GS]ETXATTR support */
1982
1983 /*
1984 * To make a new on-disk f2fs i_flag gettable via FS_IOC_GETFLAGS, add an entry
1985 * for it to f2fs_fsflags_map[], and add its FS_*_FL equivalent to
1986 * F2FS_GETTABLE_FS_FL. To also make it settable via FS_IOC_SETFLAGS, also add
1987 * its FS_*_FL equivalent to F2FS_SETTABLE_FS_FL.
1988 *
1989 * Translating flags to fsx_flags value used by FS_IOC_FSGETXATTR and
1990 * FS_IOC_FSSETXATTR is done by the VFS.
1991 */
1992
1993 static const struct {
1994 u32 iflag;
1995 u32 fsflag;
1996 } f2fs_fsflags_map[] = {
1997 { F2FS_COMPR_FL, FS_COMPR_FL },
1998 { F2FS_SYNC_FL, FS_SYNC_FL },
1999 { F2FS_IMMUTABLE_FL, FS_IMMUTABLE_FL },
2000 { F2FS_APPEND_FL, FS_APPEND_FL },
2001 { F2FS_NODUMP_FL, FS_NODUMP_FL },
2002 { F2FS_NOATIME_FL, FS_NOATIME_FL },
2003 { F2FS_NOCOMP_FL, FS_NOCOMP_FL },
2004 { F2FS_INDEX_FL, FS_INDEX_FL },
2005 { F2FS_DIRSYNC_FL, FS_DIRSYNC_FL },
2006 { F2FS_PROJINHERIT_FL, FS_PROJINHERIT_FL },
2007 { F2FS_CASEFOLD_FL, FS_CASEFOLD_FL },
2008 };
2009
2010 #define F2FS_GETTABLE_FS_FL ( \
2011 FS_COMPR_FL | \
2012 FS_SYNC_FL | \
2013 FS_IMMUTABLE_FL | \
2014 FS_APPEND_FL | \
2015 FS_NODUMP_FL | \
2016 FS_NOATIME_FL | \
2017 FS_NOCOMP_FL | \
2018 FS_INDEX_FL | \
2019 FS_DIRSYNC_FL | \
2020 FS_PROJINHERIT_FL | \
2021 FS_ENCRYPT_FL | \
2022 FS_INLINE_DATA_FL | \
2023 FS_NOCOW_FL | \
2024 FS_VERITY_FL | \
2025 FS_CASEFOLD_FL)
2026
2027 #define F2FS_SETTABLE_FS_FL ( \
2028 FS_COMPR_FL | \
2029 FS_SYNC_FL | \
2030 FS_IMMUTABLE_FL | \
2031 FS_APPEND_FL | \
2032 FS_NODUMP_FL | \
2033 FS_NOATIME_FL | \
2034 FS_NOCOMP_FL | \
2035 FS_DIRSYNC_FL | \
2036 FS_PROJINHERIT_FL | \
2037 FS_CASEFOLD_FL)
2038
2039 /* Convert f2fs on-disk i_flags to FS_IOC_{GET,SET}FLAGS flags */
f2fs_iflags_to_fsflags(u32 iflags)2040 static inline u32 f2fs_iflags_to_fsflags(u32 iflags)
2041 {
2042 u32 fsflags = 0;
2043 int i;
2044
2045 for (i = 0; i < ARRAY_SIZE(f2fs_fsflags_map); i++)
2046 if (iflags & f2fs_fsflags_map[i].iflag)
2047 fsflags |= f2fs_fsflags_map[i].fsflag;
2048
2049 return fsflags;
2050 }
2051
2052 /* Convert FS_IOC_{GET,SET}FLAGS flags to f2fs on-disk i_flags */
f2fs_fsflags_to_iflags(u32 fsflags)2053 static inline u32 f2fs_fsflags_to_iflags(u32 fsflags)
2054 {
2055 u32 iflags = 0;
2056 int i;
2057
2058 for (i = 0; i < ARRAY_SIZE(f2fs_fsflags_map); i++)
2059 if (fsflags & f2fs_fsflags_map[i].fsflag)
2060 iflags |= f2fs_fsflags_map[i].iflag;
2061
2062 return iflags;
2063 }
2064
f2fs_ioc_getversion(struct file * filp,unsigned long arg)2065 static int f2fs_ioc_getversion(struct file *filp, unsigned long arg)
2066 {
2067 struct inode *inode = file_inode(filp);
2068
2069 return put_user(inode->i_generation, (int __user *)arg);
2070 }
2071
f2fs_ioc_start_atomic_write(struct file * filp,bool truncate)2072 static int f2fs_ioc_start_atomic_write(struct file *filp, bool truncate)
2073 {
2074 struct inode *inode = file_inode(filp);
2075 struct mnt_idmap *idmap = file_mnt_idmap(filp);
2076 struct f2fs_inode_info *fi = F2FS_I(inode);
2077 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2078 struct inode *pinode;
2079 loff_t isize;
2080 int ret;
2081
2082 if (!inode_owner_or_capable(idmap, inode))
2083 return -EACCES;
2084
2085 if (!S_ISREG(inode->i_mode))
2086 return -EINVAL;
2087
2088 if (filp->f_flags & O_DIRECT)
2089 return -EINVAL;
2090
2091 ret = mnt_want_write_file(filp);
2092 if (ret)
2093 return ret;
2094
2095 inode_lock(inode);
2096
2097 if (!f2fs_disable_compressed_file(inode) ||
2098 f2fs_is_pinned_file(inode)) {
2099 ret = -EINVAL;
2100 goto out;
2101 }
2102
2103 if (f2fs_is_atomic_file(inode))
2104 goto out;
2105
2106 ret = f2fs_convert_inline_inode(inode);
2107 if (ret)
2108 goto out;
2109
2110 f2fs_down_write(&fi->i_gc_rwsem[WRITE]);
2111
2112 /*
2113 * Should wait end_io to count F2FS_WB_CP_DATA correctly by
2114 * f2fs_is_atomic_file.
2115 */
2116 if (get_dirty_pages(inode))
2117 f2fs_warn(sbi, "Unexpected flush for atomic writes: ino=%lu, npages=%u",
2118 inode->i_ino, get_dirty_pages(inode));
2119 ret = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX);
2120 if (ret) {
2121 f2fs_up_write(&fi->i_gc_rwsem[WRITE]);
2122 goto out;
2123 }
2124
2125 /* Check if the inode already has a COW inode */
2126 if (fi->cow_inode == NULL) {
2127 /* Create a COW inode for atomic write */
2128 pinode = f2fs_iget(inode->i_sb, fi->i_pino);
2129 if (IS_ERR(pinode)) {
2130 f2fs_up_write(&fi->i_gc_rwsem[WRITE]);
2131 ret = PTR_ERR(pinode);
2132 goto out;
2133 }
2134
2135 ret = f2fs_get_tmpfile(idmap, pinode, &fi->cow_inode);
2136 iput(pinode);
2137 if (ret) {
2138 f2fs_up_write(&fi->i_gc_rwsem[WRITE]);
2139 goto out;
2140 }
2141
2142 set_inode_flag(fi->cow_inode, FI_COW_FILE);
2143 clear_inode_flag(fi->cow_inode, FI_INLINE_DATA);
2144 } else {
2145 /* Reuse the already created COW inode */
2146 ret = f2fs_do_truncate_blocks(fi->cow_inode, 0, true);
2147 if (ret) {
2148 f2fs_up_write(&fi->i_gc_rwsem[WRITE]);
2149 goto out;
2150 }
2151 }
2152
2153 f2fs_write_inode(inode, NULL);
2154
2155 stat_inc_atomic_inode(inode);
2156
2157 set_inode_flag(inode, FI_ATOMIC_FILE);
2158
2159 isize = i_size_read(inode);
2160 fi->original_i_size = isize;
2161 if (truncate) {
2162 set_inode_flag(inode, FI_ATOMIC_REPLACE);
2163 truncate_inode_pages_final(inode->i_mapping);
2164 f2fs_i_size_write(inode, 0);
2165 isize = 0;
2166 }
2167 f2fs_i_size_write(fi->cow_inode, isize);
2168
2169 f2fs_up_write(&fi->i_gc_rwsem[WRITE]);
2170
2171 f2fs_update_time(sbi, REQ_TIME);
2172 fi->atomic_write_task = current;
2173 stat_update_max_atomic_write(inode);
2174 fi->atomic_write_cnt = 0;
2175 out:
2176 inode_unlock(inode);
2177 mnt_drop_write_file(filp);
2178 return ret;
2179 }
2180
f2fs_ioc_commit_atomic_write(struct file * filp)2181 static int f2fs_ioc_commit_atomic_write(struct file *filp)
2182 {
2183 struct inode *inode = file_inode(filp);
2184 struct mnt_idmap *idmap = file_mnt_idmap(filp);
2185 int ret;
2186
2187 if (!inode_owner_or_capable(idmap, inode))
2188 return -EACCES;
2189
2190 ret = mnt_want_write_file(filp);
2191 if (ret)
2192 return ret;
2193
2194 f2fs_balance_fs(F2FS_I_SB(inode), true);
2195
2196 inode_lock(inode);
2197
2198 if (f2fs_is_atomic_file(inode)) {
2199 ret = f2fs_commit_atomic_write(inode);
2200 if (!ret)
2201 ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 0, true);
2202
2203 f2fs_abort_atomic_write(inode, ret);
2204 } else {
2205 ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 1, false);
2206 }
2207
2208 inode_unlock(inode);
2209 mnt_drop_write_file(filp);
2210 return ret;
2211 }
2212
f2fs_ioc_abort_atomic_write(struct file * filp)2213 static int f2fs_ioc_abort_atomic_write(struct file *filp)
2214 {
2215 struct inode *inode = file_inode(filp);
2216 struct mnt_idmap *idmap = file_mnt_idmap(filp);
2217 int ret;
2218
2219 if (!inode_owner_or_capable(idmap, inode))
2220 return -EACCES;
2221
2222 ret = mnt_want_write_file(filp);
2223 if (ret)
2224 return ret;
2225
2226 inode_lock(inode);
2227
2228 f2fs_abort_atomic_write(inode, true);
2229
2230 inode_unlock(inode);
2231
2232 mnt_drop_write_file(filp);
2233 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
2234 return ret;
2235 }
2236
f2fs_do_shutdown(struct f2fs_sb_info * sbi,unsigned int flag,bool readonly)2237 int f2fs_do_shutdown(struct f2fs_sb_info *sbi, unsigned int flag,
2238 bool readonly)
2239 {
2240 struct super_block *sb = sbi->sb;
2241 int ret = 0;
2242
2243 switch (flag) {
2244 case F2FS_GOING_DOWN_FULLSYNC:
2245 ret = bdev_freeze(sb->s_bdev);
2246 if (ret)
2247 goto out;
2248 f2fs_stop_checkpoint(sbi, false, STOP_CP_REASON_SHUTDOWN);
2249 bdev_thaw(sb->s_bdev);
2250 break;
2251 case F2FS_GOING_DOWN_METASYNC:
2252 /* do checkpoint only */
2253 ret = f2fs_sync_fs(sb, 1);
2254 if (ret) {
2255 if (ret == -EIO)
2256 ret = 0;
2257 goto out;
2258 }
2259 f2fs_stop_checkpoint(sbi, false, STOP_CP_REASON_SHUTDOWN);
2260 break;
2261 case F2FS_GOING_DOWN_NOSYNC:
2262 f2fs_stop_checkpoint(sbi, false, STOP_CP_REASON_SHUTDOWN);
2263 break;
2264 case F2FS_GOING_DOWN_METAFLUSH:
2265 f2fs_sync_meta_pages(sbi, META, LONG_MAX, FS_META_IO);
2266 f2fs_stop_checkpoint(sbi, false, STOP_CP_REASON_SHUTDOWN);
2267 break;
2268 case F2FS_GOING_DOWN_NEED_FSCK:
2269 set_sbi_flag(sbi, SBI_NEED_FSCK);
2270 set_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
2271 set_sbi_flag(sbi, SBI_IS_DIRTY);
2272 /* do checkpoint only */
2273 ret = f2fs_sync_fs(sb, 1);
2274 if (ret == -EIO)
2275 ret = 0;
2276 goto out;
2277 default:
2278 ret = -EINVAL;
2279 goto out;
2280 }
2281
2282 if (readonly)
2283 goto out;
2284
2285 f2fs_stop_gc_thread(sbi);
2286 f2fs_stop_discard_thread(sbi);
2287
2288 f2fs_drop_discard_cmd(sbi);
2289 clear_opt(sbi, DISCARD);
2290
2291 f2fs_update_time(sbi, REQ_TIME);
2292 out:
2293
2294 trace_f2fs_shutdown(sbi, flag, ret);
2295
2296 return ret;
2297 }
2298
f2fs_ioc_shutdown(struct file * filp,unsigned long arg)2299 static int f2fs_ioc_shutdown(struct file *filp, unsigned long arg)
2300 {
2301 struct inode *inode = file_inode(filp);
2302 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2303 __u32 in;
2304 int ret;
2305 bool need_drop = false, readonly = false;
2306
2307 if (!capable(CAP_SYS_ADMIN))
2308 return -EPERM;
2309
2310 if (get_user(in, (__u32 __user *)arg))
2311 return -EFAULT;
2312
2313 if (in != F2FS_GOING_DOWN_FULLSYNC) {
2314 ret = mnt_want_write_file(filp);
2315 if (ret) {
2316 if (ret != -EROFS)
2317 return ret;
2318
2319 /* fallback to nosync shutdown for readonly fs */
2320 in = F2FS_GOING_DOWN_NOSYNC;
2321 readonly = true;
2322 } else {
2323 need_drop = true;
2324 }
2325 }
2326
2327 ret = f2fs_do_shutdown(sbi, in, readonly);
2328
2329 if (need_drop)
2330 mnt_drop_write_file(filp);
2331
2332 return ret;
2333 }
2334
f2fs_ioc_fitrim(struct file * filp,unsigned long arg)2335 static int f2fs_ioc_fitrim(struct file *filp, unsigned long arg)
2336 {
2337 struct inode *inode = file_inode(filp);
2338 struct super_block *sb = inode->i_sb;
2339 struct fstrim_range range;
2340 int ret;
2341
2342 if (!capable(CAP_SYS_ADMIN))
2343 return -EPERM;
2344
2345 if (!f2fs_hw_support_discard(F2FS_SB(sb)))
2346 return -EOPNOTSUPP;
2347
2348 if (copy_from_user(&range, (struct fstrim_range __user *)arg,
2349 sizeof(range)))
2350 return -EFAULT;
2351
2352 ret = mnt_want_write_file(filp);
2353 if (ret)
2354 return ret;
2355
2356 range.minlen = max((unsigned int)range.minlen,
2357 bdev_discard_granularity(sb->s_bdev));
2358 ret = f2fs_trim_fs(F2FS_SB(sb), &range);
2359 mnt_drop_write_file(filp);
2360 if (ret < 0)
2361 return ret;
2362
2363 if (copy_to_user((struct fstrim_range __user *)arg, &range,
2364 sizeof(range)))
2365 return -EFAULT;
2366 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
2367 return 0;
2368 }
2369
uuid_is_nonzero(__u8 u[16])2370 static bool uuid_is_nonzero(__u8 u[16])
2371 {
2372 int i;
2373
2374 for (i = 0; i < 16; i++)
2375 if (u[i])
2376 return true;
2377 return false;
2378 }
2379
f2fs_ioc_set_encryption_policy(struct file * filp,unsigned long arg)2380 static int f2fs_ioc_set_encryption_policy(struct file *filp, unsigned long arg)
2381 {
2382 struct inode *inode = file_inode(filp);
2383 int ret;
2384
2385 if (!f2fs_sb_has_encrypt(F2FS_I_SB(inode)))
2386 return -EOPNOTSUPP;
2387
2388 ret = fscrypt_ioctl_set_policy(filp, (const void __user *)arg);
2389 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
2390 return ret;
2391 }
2392
f2fs_ioc_get_encryption_policy(struct file * filp,unsigned long arg)2393 static int f2fs_ioc_get_encryption_policy(struct file *filp, unsigned long arg)
2394 {
2395 if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp))))
2396 return -EOPNOTSUPP;
2397 return fscrypt_ioctl_get_policy(filp, (void __user *)arg);
2398 }
2399
f2fs_ioc_get_encryption_pwsalt(struct file * filp,unsigned long arg)2400 static int f2fs_ioc_get_encryption_pwsalt(struct file *filp, unsigned long arg)
2401 {
2402 struct inode *inode = file_inode(filp);
2403 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2404 u8 encrypt_pw_salt[16];
2405 int err;
2406
2407 if (!f2fs_sb_has_encrypt(sbi))
2408 return -EOPNOTSUPP;
2409
2410 err = mnt_want_write_file(filp);
2411 if (err)
2412 return err;
2413
2414 f2fs_down_write(&sbi->sb_lock);
2415
2416 if (uuid_is_nonzero(sbi->raw_super->encrypt_pw_salt))
2417 goto got_it;
2418
2419 /* update superblock with uuid */
2420 generate_random_uuid(sbi->raw_super->encrypt_pw_salt);
2421
2422 err = f2fs_commit_super(sbi, false);
2423 if (err) {
2424 /* undo new data */
2425 memset(sbi->raw_super->encrypt_pw_salt, 0, 16);
2426 goto out_err;
2427 }
2428 got_it:
2429 memcpy(encrypt_pw_salt, sbi->raw_super->encrypt_pw_salt, 16);
2430 out_err:
2431 f2fs_up_write(&sbi->sb_lock);
2432 mnt_drop_write_file(filp);
2433
2434 if (!err && copy_to_user((__u8 __user *)arg, encrypt_pw_salt, 16))
2435 err = -EFAULT;
2436
2437 return err;
2438 }
2439
f2fs_ioc_get_encryption_policy_ex(struct file * filp,unsigned long arg)2440 static int f2fs_ioc_get_encryption_policy_ex(struct file *filp,
2441 unsigned long arg)
2442 {
2443 if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp))))
2444 return -EOPNOTSUPP;
2445
2446 return fscrypt_ioctl_get_policy_ex(filp, (void __user *)arg);
2447 }
2448
f2fs_ioc_add_encryption_key(struct file * filp,unsigned long arg)2449 static int f2fs_ioc_add_encryption_key(struct file *filp, unsigned long arg)
2450 {
2451 if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp))))
2452 return -EOPNOTSUPP;
2453
2454 return fscrypt_ioctl_add_key(filp, (void __user *)arg);
2455 }
2456
f2fs_ioc_remove_encryption_key(struct file * filp,unsigned long arg)2457 static int f2fs_ioc_remove_encryption_key(struct file *filp, unsigned long arg)
2458 {
2459 if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp))))
2460 return -EOPNOTSUPP;
2461
2462 return fscrypt_ioctl_remove_key(filp, (void __user *)arg);
2463 }
2464
f2fs_ioc_remove_encryption_key_all_users(struct file * filp,unsigned long arg)2465 static int f2fs_ioc_remove_encryption_key_all_users(struct file *filp,
2466 unsigned long arg)
2467 {
2468 if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp))))
2469 return -EOPNOTSUPP;
2470
2471 return fscrypt_ioctl_remove_key_all_users(filp, (void __user *)arg);
2472 }
2473
f2fs_ioc_get_encryption_key_status(struct file * filp,unsigned long arg)2474 static int f2fs_ioc_get_encryption_key_status(struct file *filp,
2475 unsigned long arg)
2476 {
2477 if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp))))
2478 return -EOPNOTSUPP;
2479
2480 return fscrypt_ioctl_get_key_status(filp, (void __user *)arg);
2481 }
2482
f2fs_ioc_get_encryption_nonce(struct file * filp,unsigned long arg)2483 static int f2fs_ioc_get_encryption_nonce(struct file *filp, unsigned long arg)
2484 {
2485 if (!f2fs_sb_has_encrypt(F2FS_I_SB(file_inode(filp))))
2486 return -EOPNOTSUPP;
2487
2488 return fscrypt_ioctl_get_nonce(filp, (void __user *)arg);
2489 }
2490
f2fs_ioc_gc(struct file * filp,unsigned long arg)2491 static int f2fs_ioc_gc(struct file *filp, unsigned long arg)
2492 {
2493 struct inode *inode = file_inode(filp);
2494 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2495 struct f2fs_gc_control gc_control = { .victim_segno = NULL_SEGNO,
2496 .no_bg_gc = false,
2497 .should_migrate_blocks = false,
2498 .nr_free_secs = 0 };
2499 __u32 sync;
2500 int ret;
2501
2502 if (!capable(CAP_SYS_ADMIN))
2503 return -EPERM;
2504
2505 if (get_user(sync, (__u32 __user *)arg))
2506 return -EFAULT;
2507
2508 if (f2fs_readonly(sbi->sb))
2509 return -EROFS;
2510
2511 ret = mnt_want_write_file(filp);
2512 if (ret)
2513 return ret;
2514
2515 if (!sync) {
2516 if (!f2fs_down_write_trylock(&sbi->gc_lock)) {
2517 ret = -EBUSY;
2518 goto out;
2519 }
2520 } else {
2521 f2fs_down_write(&sbi->gc_lock);
2522 }
2523
2524 gc_control.init_gc_type = sync ? FG_GC : BG_GC;
2525 gc_control.err_gc_skipped = sync;
2526 stat_inc_gc_call_count(sbi, FOREGROUND);
2527 ret = f2fs_gc(sbi, &gc_control);
2528 out:
2529 mnt_drop_write_file(filp);
2530 return ret;
2531 }
2532
__f2fs_ioc_gc_range(struct file * filp,struct f2fs_gc_range * range)2533 static int __f2fs_ioc_gc_range(struct file *filp, struct f2fs_gc_range *range)
2534 {
2535 struct f2fs_sb_info *sbi = F2FS_I_SB(file_inode(filp));
2536 struct f2fs_gc_control gc_control = {
2537 .init_gc_type = range->sync ? FG_GC : BG_GC,
2538 .no_bg_gc = false,
2539 .should_migrate_blocks = false,
2540 .err_gc_skipped = range->sync,
2541 .nr_free_secs = 0 };
2542 u64 end;
2543 int ret;
2544
2545 if (!capable(CAP_SYS_ADMIN))
2546 return -EPERM;
2547 if (f2fs_readonly(sbi->sb))
2548 return -EROFS;
2549
2550 end = range->start + range->len;
2551 if (end < range->start || range->start < MAIN_BLKADDR(sbi) ||
2552 end >= MAX_BLKADDR(sbi))
2553 return -EINVAL;
2554
2555 ret = mnt_want_write_file(filp);
2556 if (ret)
2557 return ret;
2558
2559 do_more:
2560 if (!range->sync) {
2561 if (!f2fs_down_write_trylock(&sbi->gc_lock)) {
2562 ret = -EBUSY;
2563 goto out;
2564 }
2565 } else {
2566 f2fs_down_write(&sbi->gc_lock);
2567 }
2568
2569 gc_control.victim_segno = GET_SEGNO(sbi, range->start);
2570 stat_inc_gc_call_count(sbi, FOREGROUND);
2571 ret = f2fs_gc(sbi, &gc_control);
2572 if (ret) {
2573 if (ret == -EBUSY)
2574 ret = -EAGAIN;
2575 goto out;
2576 }
2577 range->start += CAP_BLKS_PER_SEC(sbi);
2578 if (range->start <= end)
2579 goto do_more;
2580 out:
2581 mnt_drop_write_file(filp);
2582 return ret;
2583 }
2584
f2fs_ioc_gc_range(struct file * filp,unsigned long arg)2585 static int f2fs_ioc_gc_range(struct file *filp, unsigned long arg)
2586 {
2587 struct f2fs_gc_range range;
2588
2589 if (copy_from_user(&range, (struct f2fs_gc_range __user *)arg,
2590 sizeof(range)))
2591 return -EFAULT;
2592 return __f2fs_ioc_gc_range(filp, &range);
2593 }
2594
f2fs_ioc_write_checkpoint(struct file * filp)2595 static int f2fs_ioc_write_checkpoint(struct file *filp)
2596 {
2597 struct inode *inode = file_inode(filp);
2598 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2599 int ret;
2600
2601 if (!capable(CAP_SYS_ADMIN))
2602 return -EPERM;
2603
2604 if (f2fs_readonly(sbi->sb))
2605 return -EROFS;
2606
2607 if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
2608 f2fs_info(sbi, "Skipping Checkpoint. Checkpoints currently disabled.");
2609 return -EINVAL;
2610 }
2611
2612 ret = mnt_want_write_file(filp);
2613 if (ret)
2614 return ret;
2615
2616 ret = f2fs_sync_fs(sbi->sb, 1);
2617
2618 mnt_drop_write_file(filp);
2619 return ret;
2620 }
2621
f2fs_defragment_range(struct f2fs_sb_info * sbi,struct file * filp,struct f2fs_defragment * range)2622 static int f2fs_defragment_range(struct f2fs_sb_info *sbi,
2623 struct file *filp,
2624 struct f2fs_defragment *range)
2625 {
2626 struct inode *inode = file_inode(filp);
2627 struct f2fs_map_blocks map = { .m_next_extent = NULL,
2628 .m_seg_type = NO_CHECK_TYPE,
2629 .m_may_create = false };
2630 struct extent_info ei = {};
2631 pgoff_t pg_start, pg_end, next_pgofs;
2632 unsigned int total = 0, sec_num;
2633 block_t blk_end = 0;
2634 bool fragmented = false;
2635 int err;
2636
2637 f2fs_balance_fs(sbi, true);
2638
2639 inode_lock(inode);
2640 pg_start = range->start >> PAGE_SHIFT;
2641 pg_end = min_t(pgoff_t,
2642 (range->start + range->len) >> PAGE_SHIFT,
2643 DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE));
2644
2645 if (is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) {
2646 err = -EINVAL;
2647 goto unlock_out;
2648 }
2649
2650 /* if in-place-update policy is enabled, don't waste time here */
2651 set_inode_flag(inode, FI_OPU_WRITE);
2652 if (f2fs_should_update_inplace(inode, NULL)) {
2653 err = -EINVAL;
2654 goto out;
2655 }
2656
2657 /* writeback all dirty pages in the range */
2658 err = filemap_write_and_wait_range(inode->i_mapping,
2659 pg_start << PAGE_SHIFT,
2660 (pg_end << PAGE_SHIFT) - 1);
2661 if (err)
2662 goto out;
2663
2664 /*
2665 * lookup mapping info in extent cache, skip defragmenting if physical
2666 * block addresses are continuous.
2667 */
2668 if (f2fs_lookup_read_extent_cache(inode, pg_start, &ei)) {
2669 if (ei.fofs + ei.len >= pg_end)
2670 goto out;
2671 }
2672
2673 map.m_lblk = pg_start;
2674 map.m_next_pgofs = &next_pgofs;
2675
2676 /*
2677 * lookup mapping info in dnode page cache, skip defragmenting if all
2678 * physical block addresses are continuous even if there are hole(s)
2679 * in logical blocks.
2680 */
2681 while (map.m_lblk < pg_end) {
2682 map.m_len = pg_end - map.m_lblk;
2683 err = f2fs_map_blocks(inode, &map, F2FS_GET_BLOCK_DEFAULT);
2684 if (err)
2685 goto out;
2686
2687 if (!(map.m_flags & F2FS_MAP_FLAGS)) {
2688 map.m_lblk = next_pgofs;
2689 continue;
2690 }
2691
2692 if (blk_end && blk_end != map.m_pblk)
2693 fragmented = true;
2694
2695 /* record total count of block that we're going to move */
2696 total += map.m_len;
2697
2698 blk_end = map.m_pblk + map.m_len;
2699
2700 map.m_lblk += map.m_len;
2701 }
2702
2703 if (!fragmented) {
2704 total = 0;
2705 goto out;
2706 }
2707
2708 sec_num = DIV_ROUND_UP(total, CAP_BLKS_PER_SEC(sbi));
2709
2710 /*
2711 * make sure there are enough free section for LFS allocation, this can
2712 * avoid defragment running in SSR mode when free section are allocated
2713 * intensively
2714 */
2715 if (has_not_enough_free_secs(sbi, 0, sec_num)) {
2716 err = -EAGAIN;
2717 goto out;
2718 }
2719
2720 map.m_lblk = pg_start;
2721 map.m_len = pg_end - pg_start;
2722 total = 0;
2723
2724 while (map.m_lblk < pg_end) {
2725 pgoff_t idx;
2726 int cnt = 0;
2727
2728 do_map:
2729 map.m_len = pg_end - map.m_lblk;
2730 err = f2fs_map_blocks(inode, &map, F2FS_GET_BLOCK_DEFAULT);
2731 if (err)
2732 goto clear_out;
2733
2734 if (!(map.m_flags & F2FS_MAP_FLAGS)) {
2735 map.m_lblk = next_pgofs;
2736 goto check;
2737 }
2738
2739 set_inode_flag(inode, FI_SKIP_WRITES);
2740
2741 idx = map.m_lblk;
2742 while (idx < map.m_lblk + map.m_len &&
2743 cnt < BLKS_PER_SEG(sbi)) {
2744 struct page *page;
2745
2746 page = f2fs_get_lock_data_page(inode, idx, true);
2747 if (IS_ERR(page)) {
2748 err = PTR_ERR(page);
2749 goto clear_out;
2750 }
2751
2752 set_page_dirty(page);
2753 set_page_private_gcing(page);
2754 f2fs_put_page(page, 1);
2755
2756 idx++;
2757 cnt++;
2758 total++;
2759 }
2760
2761 map.m_lblk = idx;
2762 check:
2763 if (map.m_lblk < pg_end && cnt < BLKS_PER_SEG(sbi))
2764 goto do_map;
2765
2766 clear_inode_flag(inode, FI_SKIP_WRITES);
2767
2768 err = filemap_fdatawrite(inode->i_mapping);
2769 if (err)
2770 goto out;
2771 }
2772 clear_out:
2773 clear_inode_flag(inode, FI_SKIP_WRITES);
2774 out:
2775 clear_inode_flag(inode, FI_OPU_WRITE);
2776 unlock_out:
2777 inode_unlock(inode);
2778 if (!err)
2779 range->len = (u64)total << PAGE_SHIFT;
2780 return err;
2781 }
2782
f2fs_ioc_defragment(struct file * filp,unsigned long arg)2783 static int f2fs_ioc_defragment(struct file *filp, unsigned long arg)
2784 {
2785 struct inode *inode = file_inode(filp);
2786 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2787 struct f2fs_defragment range;
2788 int err;
2789
2790 if (!capable(CAP_SYS_ADMIN))
2791 return -EPERM;
2792
2793 if (!S_ISREG(inode->i_mode) || f2fs_is_atomic_file(inode))
2794 return -EINVAL;
2795
2796 if (f2fs_readonly(sbi->sb))
2797 return -EROFS;
2798
2799 if (copy_from_user(&range, (struct f2fs_defragment __user *)arg,
2800 sizeof(range)))
2801 return -EFAULT;
2802
2803 /* verify alignment of offset & size */
2804 if (range.start & (F2FS_BLKSIZE - 1) || range.len & (F2FS_BLKSIZE - 1))
2805 return -EINVAL;
2806
2807 if (unlikely((range.start + range.len) >> PAGE_SHIFT >
2808 max_file_blocks(inode)))
2809 return -EINVAL;
2810
2811 err = mnt_want_write_file(filp);
2812 if (err)
2813 return err;
2814
2815 err = f2fs_defragment_range(sbi, filp, &range);
2816 mnt_drop_write_file(filp);
2817
2818 if (range.len)
2819 f2fs_update_time(sbi, REQ_TIME);
2820 if (err < 0)
2821 return err;
2822
2823 if (copy_to_user((struct f2fs_defragment __user *)arg, &range,
2824 sizeof(range)))
2825 return -EFAULT;
2826
2827 return 0;
2828 }
2829
f2fs_move_file_range(struct file * file_in,loff_t pos_in,struct file * file_out,loff_t pos_out,size_t len)2830 static int f2fs_move_file_range(struct file *file_in, loff_t pos_in,
2831 struct file *file_out, loff_t pos_out, size_t len)
2832 {
2833 struct inode *src = file_inode(file_in);
2834 struct inode *dst = file_inode(file_out);
2835 struct f2fs_sb_info *sbi = F2FS_I_SB(src);
2836 size_t olen = len, dst_max_i_size = 0;
2837 size_t dst_osize;
2838 int ret;
2839
2840 if (file_in->f_path.mnt != file_out->f_path.mnt ||
2841 src->i_sb != dst->i_sb)
2842 return -EXDEV;
2843
2844 if (unlikely(f2fs_readonly(src->i_sb)))
2845 return -EROFS;
2846
2847 if (!S_ISREG(src->i_mode) || !S_ISREG(dst->i_mode))
2848 return -EINVAL;
2849
2850 if (IS_ENCRYPTED(src) || IS_ENCRYPTED(dst))
2851 return -EOPNOTSUPP;
2852
2853 if (pos_out < 0 || pos_in < 0)
2854 return -EINVAL;
2855
2856 if (src == dst) {
2857 if (pos_in == pos_out)
2858 return 0;
2859 if (pos_out > pos_in && pos_out < pos_in + len)
2860 return -EINVAL;
2861 }
2862
2863 inode_lock(src);
2864 if (src != dst) {
2865 ret = -EBUSY;
2866 if (!inode_trylock(dst))
2867 goto out;
2868 }
2869
2870 if (f2fs_compressed_file(src) || f2fs_compressed_file(dst) ||
2871 f2fs_is_pinned_file(src) || f2fs_is_pinned_file(dst)) {
2872 ret = -EOPNOTSUPP;
2873 goto out_unlock;
2874 }
2875
2876 ret = -EINVAL;
2877 if (pos_in + len > src->i_size || pos_in + len < pos_in)
2878 goto out_unlock;
2879 if (len == 0)
2880 olen = len = src->i_size - pos_in;
2881 if (pos_in + len == src->i_size)
2882 len = ALIGN(src->i_size, F2FS_BLKSIZE) - pos_in;
2883 if (len == 0) {
2884 ret = 0;
2885 goto out_unlock;
2886 }
2887
2888 dst_osize = dst->i_size;
2889 if (pos_out + olen > dst->i_size)
2890 dst_max_i_size = pos_out + olen;
2891
2892 /* verify the end result is block aligned */
2893 if (!IS_ALIGNED(pos_in, F2FS_BLKSIZE) ||
2894 !IS_ALIGNED(pos_in + len, F2FS_BLKSIZE) ||
2895 !IS_ALIGNED(pos_out, F2FS_BLKSIZE))
2896 goto out_unlock;
2897
2898 ret = f2fs_convert_inline_inode(src);
2899 if (ret)
2900 goto out_unlock;
2901
2902 ret = f2fs_convert_inline_inode(dst);
2903 if (ret)
2904 goto out_unlock;
2905
2906 /* write out all dirty pages from offset */
2907 ret = filemap_write_and_wait_range(src->i_mapping,
2908 pos_in, pos_in + len);
2909 if (ret)
2910 goto out_unlock;
2911
2912 ret = filemap_write_and_wait_range(dst->i_mapping,
2913 pos_out, pos_out + len);
2914 if (ret)
2915 goto out_unlock;
2916
2917 f2fs_balance_fs(sbi, true);
2918
2919 f2fs_down_write(&F2FS_I(src)->i_gc_rwsem[WRITE]);
2920 if (src != dst) {
2921 ret = -EBUSY;
2922 if (!f2fs_down_write_trylock(&F2FS_I(dst)->i_gc_rwsem[WRITE]))
2923 goto out_src;
2924 }
2925
2926 f2fs_lock_op(sbi);
2927 ret = __exchange_data_block(src, dst, pos_in >> F2FS_BLKSIZE_BITS,
2928 pos_out >> F2FS_BLKSIZE_BITS,
2929 len >> F2FS_BLKSIZE_BITS, false);
2930
2931 if (!ret) {
2932 if (dst_max_i_size)
2933 f2fs_i_size_write(dst, dst_max_i_size);
2934 else if (dst_osize != dst->i_size)
2935 f2fs_i_size_write(dst, dst_osize);
2936 }
2937 f2fs_unlock_op(sbi);
2938
2939 if (src != dst)
2940 f2fs_up_write(&F2FS_I(dst)->i_gc_rwsem[WRITE]);
2941 out_src:
2942 f2fs_up_write(&F2FS_I(src)->i_gc_rwsem[WRITE]);
2943 if (ret)
2944 goto out_unlock;
2945
2946 inode_set_mtime_to_ts(src, inode_set_ctime_current(src));
2947 f2fs_mark_inode_dirty_sync(src, false);
2948 if (src != dst) {
2949 inode_set_mtime_to_ts(dst, inode_set_ctime_current(dst));
2950 f2fs_mark_inode_dirty_sync(dst, false);
2951 }
2952 f2fs_update_time(sbi, REQ_TIME);
2953
2954 out_unlock:
2955 if (src != dst)
2956 inode_unlock(dst);
2957 out:
2958 inode_unlock(src);
2959 return ret;
2960 }
2961
__f2fs_ioc_move_range(struct file * filp,struct f2fs_move_range * range)2962 static int __f2fs_ioc_move_range(struct file *filp,
2963 struct f2fs_move_range *range)
2964 {
2965 struct fd dst;
2966 int err;
2967
2968 if (!(filp->f_mode & FMODE_READ) ||
2969 !(filp->f_mode & FMODE_WRITE))
2970 return -EBADF;
2971
2972 dst = fdget(range->dst_fd);
2973 if (!dst.file)
2974 return -EBADF;
2975
2976 if (!(dst.file->f_mode & FMODE_WRITE)) {
2977 err = -EBADF;
2978 goto err_out;
2979 }
2980
2981 err = mnt_want_write_file(filp);
2982 if (err)
2983 goto err_out;
2984
2985 err = f2fs_move_file_range(filp, range->pos_in, dst.file,
2986 range->pos_out, range->len);
2987
2988 mnt_drop_write_file(filp);
2989 err_out:
2990 fdput(dst);
2991 return err;
2992 }
2993
f2fs_ioc_move_range(struct file * filp,unsigned long arg)2994 static int f2fs_ioc_move_range(struct file *filp, unsigned long arg)
2995 {
2996 struct f2fs_move_range range;
2997
2998 if (copy_from_user(&range, (struct f2fs_move_range __user *)arg,
2999 sizeof(range)))
3000 return -EFAULT;
3001 return __f2fs_ioc_move_range(filp, &range);
3002 }
3003
f2fs_ioc_flush_device(struct file * filp,unsigned long arg)3004 static int f2fs_ioc_flush_device(struct file *filp, unsigned long arg)
3005 {
3006 struct inode *inode = file_inode(filp);
3007 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3008 struct sit_info *sm = SIT_I(sbi);
3009 unsigned int start_segno = 0, end_segno = 0;
3010 unsigned int dev_start_segno = 0, dev_end_segno = 0;
3011 struct f2fs_flush_device range;
3012 struct f2fs_gc_control gc_control = {
3013 .init_gc_type = FG_GC,
3014 .should_migrate_blocks = true,
3015 .err_gc_skipped = true,
3016 .nr_free_secs = 0 };
3017 int ret;
3018
3019 if (!capable(CAP_SYS_ADMIN))
3020 return -EPERM;
3021
3022 if (f2fs_readonly(sbi->sb))
3023 return -EROFS;
3024
3025 if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
3026 return -EINVAL;
3027
3028 if (copy_from_user(&range, (struct f2fs_flush_device __user *)arg,
3029 sizeof(range)))
3030 return -EFAULT;
3031
3032 if (!f2fs_is_multi_device(sbi) || sbi->s_ndevs - 1 <= range.dev_num ||
3033 __is_large_section(sbi)) {
3034 f2fs_warn(sbi, "Can't flush %u in %d for SEGS_PER_SEC %u != 1",
3035 range.dev_num, sbi->s_ndevs, SEGS_PER_SEC(sbi));
3036 return -EINVAL;
3037 }
3038
3039 ret = mnt_want_write_file(filp);
3040 if (ret)
3041 return ret;
3042
3043 if (range.dev_num != 0)
3044 dev_start_segno = GET_SEGNO(sbi, FDEV(range.dev_num).start_blk);
3045 dev_end_segno = GET_SEGNO(sbi, FDEV(range.dev_num).end_blk);
3046
3047 start_segno = sm->last_victim[FLUSH_DEVICE];
3048 if (start_segno < dev_start_segno || start_segno >= dev_end_segno)
3049 start_segno = dev_start_segno;
3050 end_segno = min(start_segno + range.segments, dev_end_segno);
3051
3052 while (start_segno < end_segno) {
3053 if (!f2fs_down_write_trylock(&sbi->gc_lock)) {
3054 ret = -EBUSY;
3055 goto out;
3056 }
3057 sm->last_victim[GC_CB] = end_segno + 1;
3058 sm->last_victim[GC_GREEDY] = end_segno + 1;
3059 sm->last_victim[ALLOC_NEXT] = end_segno + 1;
3060
3061 gc_control.victim_segno = start_segno;
3062 stat_inc_gc_call_count(sbi, FOREGROUND);
3063 ret = f2fs_gc(sbi, &gc_control);
3064 if (ret == -EAGAIN)
3065 ret = 0;
3066 else if (ret < 0)
3067 break;
3068 start_segno++;
3069 }
3070 out:
3071 mnt_drop_write_file(filp);
3072 return ret;
3073 }
3074
f2fs_ioc_get_features(struct file * filp,unsigned long arg)3075 static int f2fs_ioc_get_features(struct file *filp, unsigned long arg)
3076 {
3077 struct inode *inode = file_inode(filp);
3078 u32 sb_feature = le32_to_cpu(F2FS_I_SB(inode)->raw_super->feature);
3079
3080 /* Must validate to set it with SQLite behavior in Android. */
3081 sb_feature |= F2FS_FEATURE_ATOMIC_WRITE;
3082
3083 return put_user(sb_feature, (u32 __user *)arg);
3084 }
3085
3086 #ifdef CONFIG_QUOTA
f2fs_transfer_project_quota(struct inode * inode,kprojid_t kprojid)3087 int f2fs_transfer_project_quota(struct inode *inode, kprojid_t kprojid)
3088 {
3089 struct dquot *transfer_to[MAXQUOTAS] = {};
3090 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3091 struct super_block *sb = sbi->sb;
3092 int err;
3093
3094 transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid));
3095 if (IS_ERR(transfer_to[PRJQUOTA]))
3096 return PTR_ERR(transfer_to[PRJQUOTA]);
3097
3098 err = __dquot_transfer(inode, transfer_to);
3099 if (err)
3100 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3101 dqput(transfer_to[PRJQUOTA]);
3102 return err;
3103 }
3104
f2fs_ioc_setproject(struct inode * inode,__u32 projid)3105 static int f2fs_ioc_setproject(struct inode *inode, __u32 projid)
3106 {
3107 struct f2fs_inode_info *fi = F2FS_I(inode);
3108 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3109 struct f2fs_inode *ri = NULL;
3110 kprojid_t kprojid;
3111 int err;
3112
3113 if (!f2fs_sb_has_project_quota(sbi)) {
3114 if (projid != F2FS_DEF_PROJID)
3115 return -EOPNOTSUPP;
3116 else
3117 return 0;
3118 }
3119
3120 if (!f2fs_has_extra_attr(inode))
3121 return -EOPNOTSUPP;
3122
3123 kprojid = make_kprojid(&init_user_ns, (projid_t)projid);
3124
3125 if (projid_eq(kprojid, fi->i_projid))
3126 return 0;
3127
3128 err = -EPERM;
3129 /* Is it quota file? Do not allow user to mess with it */
3130 if (IS_NOQUOTA(inode))
3131 return err;
3132
3133 if (!F2FS_FITS_IN_INODE(ri, fi->i_extra_isize, i_projid))
3134 return -EOVERFLOW;
3135
3136 err = f2fs_dquot_initialize(inode);
3137 if (err)
3138 return err;
3139
3140 f2fs_lock_op(sbi);
3141 err = f2fs_transfer_project_quota(inode, kprojid);
3142 if (err)
3143 goto out_unlock;
3144
3145 fi->i_projid = kprojid;
3146 inode_set_ctime_current(inode);
3147 f2fs_mark_inode_dirty_sync(inode, true);
3148 out_unlock:
3149 f2fs_unlock_op(sbi);
3150 return err;
3151 }
3152 #else
f2fs_transfer_project_quota(struct inode * inode,kprojid_t kprojid)3153 int f2fs_transfer_project_quota(struct inode *inode, kprojid_t kprojid)
3154 {
3155 return 0;
3156 }
3157
f2fs_ioc_setproject(struct inode * inode,__u32 projid)3158 static int f2fs_ioc_setproject(struct inode *inode, __u32 projid)
3159 {
3160 if (projid != F2FS_DEF_PROJID)
3161 return -EOPNOTSUPP;
3162 return 0;
3163 }
3164 #endif
3165
f2fs_fileattr_get(struct dentry * dentry,struct fileattr * fa)3166 int f2fs_fileattr_get(struct dentry *dentry, struct fileattr *fa)
3167 {
3168 struct inode *inode = d_inode(dentry);
3169 struct f2fs_inode_info *fi = F2FS_I(inode);
3170 u32 fsflags = f2fs_iflags_to_fsflags(fi->i_flags);
3171
3172 if (IS_ENCRYPTED(inode))
3173 fsflags |= FS_ENCRYPT_FL;
3174 if (IS_VERITY(inode))
3175 fsflags |= FS_VERITY_FL;
3176 if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode))
3177 fsflags |= FS_INLINE_DATA_FL;
3178 if (is_inode_flag_set(inode, FI_PIN_FILE))
3179 fsflags |= FS_NOCOW_FL;
3180
3181 fileattr_fill_flags(fa, fsflags & F2FS_GETTABLE_FS_FL);
3182
3183 if (f2fs_sb_has_project_quota(F2FS_I_SB(inode)))
3184 fa->fsx_projid = from_kprojid(&init_user_ns, fi->i_projid);
3185
3186 return 0;
3187 }
3188
f2fs_fileattr_set(struct mnt_idmap * idmap,struct dentry * dentry,struct fileattr * fa)3189 int f2fs_fileattr_set(struct mnt_idmap *idmap,
3190 struct dentry *dentry, struct fileattr *fa)
3191 {
3192 struct inode *inode = d_inode(dentry);
3193 u32 fsflags = fa->flags, mask = F2FS_SETTABLE_FS_FL;
3194 u32 iflags;
3195 int err;
3196
3197 if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
3198 return -EIO;
3199 if (!f2fs_is_checkpoint_ready(F2FS_I_SB(inode)))
3200 return -ENOSPC;
3201 if (fsflags & ~F2FS_GETTABLE_FS_FL)
3202 return -EOPNOTSUPP;
3203 fsflags &= F2FS_SETTABLE_FS_FL;
3204 if (!fa->flags_valid)
3205 mask &= FS_COMMON_FL;
3206
3207 iflags = f2fs_fsflags_to_iflags(fsflags);
3208 if (f2fs_mask_flags(inode->i_mode, iflags) != iflags)
3209 return -EOPNOTSUPP;
3210
3211 err = f2fs_setflags_common(inode, iflags, f2fs_fsflags_to_iflags(mask));
3212 if (!err)
3213 err = f2fs_ioc_setproject(inode, fa->fsx_projid);
3214
3215 return err;
3216 }
3217
f2fs_pin_file_control(struct inode * inode,bool inc)3218 int f2fs_pin_file_control(struct inode *inode, bool inc)
3219 {
3220 struct f2fs_inode_info *fi = F2FS_I(inode);
3221 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3222
3223 if (fi->i_gc_failures >= sbi->gc_pin_file_threshold) {
3224 f2fs_warn(sbi, "%s: Enable GC = ino %lx after %x GC trials",
3225 __func__, inode->i_ino, fi->i_gc_failures);
3226 clear_inode_flag(inode, FI_PIN_FILE);
3227 return -EAGAIN;
3228 }
3229
3230 /* Use i_gc_failures for normal file as a risk signal. */
3231 if (inc)
3232 f2fs_i_gc_failures_write(inode, fi->i_gc_failures + 1);
3233
3234 return 0;
3235 }
3236
f2fs_ioc_set_pin_file(struct file * filp,unsigned long arg)3237 static int f2fs_ioc_set_pin_file(struct file *filp, unsigned long arg)
3238 {
3239 struct inode *inode = file_inode(filp);
3240 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3241 __u32 pin;
3242 int ret = 0;
3243
3244 if (get_user(pin, (__u32 __user *)arg))
3245 return -EFAULT;
3246
3247 if (!S_ISREG(inode->i_mode))
3248 return -EINVAL;
3249
3250 if (f2fs_readonly(sbi->sb))
3251 return -EROFS;
3252
3253 ret = mnt_want_write_file(filp);
3254 if (ret)
3255 return ret;
3256
3257 inode_lock(inode);
3258
3259 if (!pin) {
3260 clear_inode_flag(inode, FI_PIN_FILE);
3261 f2fs_i_gc_failures_write(inode, 0);
3262 goto done;
3263 } else if (f2fs_is_pinned_file(inode)) {
3264 goto done;
3265 }
3266
3267 if (F2FS_HAS_BLOCKS(inode)) {
3268 ret = -EFBIG;
3269 goto out;
3270 }
3271
3272 /* Let's allow file pinning on zoned device. */
3273 if (!f2fs_sb_has_blkzoned(sbi) &&
3274 f2fs_should_update_outplace(inode, NULL)) {
3275 ret = -EINVAL;
3276 goto out;
3277 }
3278
3279 if (f2fs_pin_file_control(inode, false)) {
3280 ret = -EAGAIN;
3281 goto out;
3282 }
3283
3284 ret = f2fs_convert_inline_inode(inode);
3285 if (ret)
3286 goto out;
3287
3288 if (!f2fs_disable_compressed_file(inode)) {
3289 ret = -EOPNOTSUPP;
3290 goto out;
3291 }
3292
3293 set_inode_flag(inode, FI_PIN_FILE);
3294 ret = F2FS_I(inode)->i_gc_failures;
3295 done:
3296 f2fs_update_time(sbi, REQ_TIME);
3297 out:
3298 inode_unlock(inode);
3299 mnt_drop_write_file(filp);
3300 return ret;
3301 }
3302
f2fs_ioc_get_pin_file(struct file * filp,unsigned long arg)3303 static int f2fs_ioc_get_pin_file(struct file *filp, unsigned long arg)
3304 {
3305 struct inode *inode = file_inode(filp);
3306 __u32 pin = 0;
3307
3308 if (is_inode_flag_set(inode, FI_PIN_FILE))
3309 pin = F2FS_I(inode)->i_gc_failures;
3310 return put_user(pin, (u32 __user *)arg);
3311 }
3312
f2fs_precache_extents(struct inode * inode)3313 int f2fs_precache_extents(struct inode *inode)
3314 {
3315 struct f2fs_inode_info *fi = F2FS_I(inode);
3316 struct f2fs_map_blocks map;
3317 pgoff_t m_next_extent;
3318 loff_t end;
3319 int err;
3320
3321 if (is_inode_flag_set(inode, FI_NO_EXTENT))
3322 return -EOPNOTSUPP;
3323
3324 map.m_lblk = 0;
3325 map.m_pblk = 0;
3326 map.m_next_pgofs = NULL;
3327 map.m_next_extent = &m_next_extent;
3328 map.m_seg_type = NO_CHECK_TYPE;
3329 map.m_may_create = false;
3330 end = F2FS_BLK_ALIGN(i_size_read(inode));
3331
3332 while (map.m_lblk < end) {
3333 map.m_len = end - map.m_lblk;
3334
3335 f2fs_down_write(&fi->i_gc_rwsem[WRITE]);
3336 err = f2fs_map_blocks(inode, &map, F2FS_GET_BLOCK_PRECACHE);
3337 f2fs_up_write(&fi->i_gc_rwsem[WRITE]);
3338 if (err || !map.m_len)
3339 return err;
3340
3341 map.m_lblk = m_next_extent;
3342 }
3343
3344 return 0;
3345 }
3346
f2fs_ioc_precache_extents(struct file * filp)3347 static int f2fs_ioc_precache_extents(struct file *filp)
3348 {
3349 return f2fs_precache_extents(file_inode(filp));
3350 }
3351
f2fs_ioc_resize_fs(struct file * filp,unsigned long arg)3352 static int f2fs_ioc_resize_fs(struct file *filp, unsigned long arg)
3353 {
3354 struct f2fs_sb_info *sbi = F2FS_I_SB(file_inode(filp));
3355 __u64 block_count;
3356
3357 if (!capable(CAP_SYS_ADMIN))
3358 return -EPERM;
3359
3360 if (f2fs_readonly(sbi->sb))
3361 return -EROFS;
3362
3363 if (copy_from_user(&block_count, (void __user *)arg,
3364 sizeof(block_count)))
3365 return -EFAULT;
3366
3367 return f2fs_resize_fs(filp, block_count);
3368 }
3369
f2fs_ioc_enable_verity(struct file * filp,unsigned long arg)3370 static int f2fs_ioc_enable_verity(struct file *filp, unsigned long arg)
3371 {
3372 struct inode *inode = file_inode(filp);
3373
3374 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
3375
3376 if (!f2fs_sb_has_verity(F2FS_I_SB(inode))) {
3377 f2fs_warn(F2FS_I_SB(inode),
3378 "Can't enable fs-verity on inode %lu: the verity feature is not enabled on this filesystem",
3379 inode->i_ino);
3380 return -EOPNOTSUPP;
3381 }
3382
3383 return fsverity_ioctl_enable(filp, (const void __user *)arg);
3384 }
3385
f2fs_ioc_measure_verity(struct file * filp,unsigned long arg)3386 static int f2fs_ioc_measure_verity(struct file *filp, unsigned long arg)
3387 {
3388 if (!f2fs_sb_has_verity(F2FS_I_SB(file_inode(filp))))
3389 return -EOPNOTSUPP;
3390
3391 return fsverity_ioctl_measure(filp, (void __user *)arg);
3392 }
3393
f2fs_ioc_read_verity_metadata(struct file * filp,unsigned long arg)3394 static int f2fs_ioc_read_verity_metadata(struct file *filp, unsigned long arg)
3395 {
3396 if (!f2fs_sb_has_verity(F2FS_I_SB(file_inode(filp))))
3397 return -EOPNOTSUPP;
3398
3399 return fsverity_ioctl_read_metadata(filp, (const void __user *)arg);
3400 }
3401
f2fs_ioc_getfslabel(struct file * filp,unsigned long arg)3402 static int f2fs_ioc_getfslabel(struct file *filp, unsigned long arg)
3403 {
3404 struct inode *inode = file_inode(filp);
3405 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3406 char *vbuf;
3407 int count;
3408 int err = 0;
3409
3410 vbuf = f2fs_kzalloc(sbi, MAX_VOLUME_NAME, GFP_KERNEL);
3411 if (!vbuf)
3412 return -ENOMEM;
3413
3414 f2fs_down_read(&sbi->sb_lock);
3415 count = utf16s_to_utf8s(sbi->raw_super->volume_name,
3416 ARRAY_SIZE(sbi->raw_super->volume_name),
3417 UTF16_LITTLE_ENDIAN, vbuf, MAX_VOLUME_NAME);
3418 f2fs_up_read(&sbi->sb_lock);
3419
3420 if (copy_to_user((char __user *)arg, vbuf,
3421 min(FSLABEL_MAX, count)))
3422 err = -EFAULT;
3423
3424 kfree(vbuf);
3425 return err;
3426 }
3427
f2fs_ioc_setfslabel(struct file * filp,unsigned long arg)3428 static int f2fs_ioc_setfslabel(struct file *filp, unsigned long arg)
3429 {
3430 struct inode *inode = file_inode(filp);
3431 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3432 char *vbuf;
3433 int err = 0;
3434
3435 if (!capable(CAP_SYS_ADMIN))
3436 return -EPERM;
3437
3438 vbuf = strndup_user((const char __user *)arg, FSLABEL_MAX);
3439 if (IS_ERR(vbuf))
3440 return PTR_ERR(vbuf);
3441
3442 err = mnt_want_write_file(filp);
3443 if (err)
3444 goto out;
3445
3446 f2fs_down_write(&sbi->sb_lock);
3447
3448 memset(sbi->raw_super->volume_name, 0,
3449 sizeof(sbi->raw_super->volume_name));
3450 utf8s_to_utf16s(vbuf, strlen(vbuf), UTF16_LITTLE_ENDIAN,
3451 sbi->raw_super->volume_name,
3452 ARRAY_SIZE(sbi->raw_super->volume_name));
3453
3454 err = f2fs_commit_super(sbi, false);
3455
3456 f2fs_up_write(&sbi->sb_lock);
3457
3458 mnt_drop_write_file(filp);
3459 out:
3460 kfree(vbuf);
3461 return err;
3462 }
3463
f2fs_get_compress_blocks(struct inode * inode,__u64 * blocks)3464 static int f2fs_get_compress_blocks(struct inode *inode, __u64 *blocks)
3465 {
3466 if (!f2fs_sb_has_compression(F2FS_I_SB(inode)))
3467 return -EOPNOTSUPP;
3468
3469 if (!f2fs_compressed_file(inode))
3470 return -EINVAL;
3471
3472 *blocks = atomic_read(&F2FS_I(inode)->i_compr_blocks);
3473
3474 return 0;
3475 }
3476
f2fs_ioc_get_compress_blocks(struct file * filp,unsigned long arg)3477 static int f2fs_ioc_get_compress_blocks(struct file *filp, unsigned long arg)
3478 {
3479 struct inode *inode = file_inode(filp);
3480 __u64 blocks;
3481 int ret;
3482
3483 ret = f2fs_get_compress_blocks(inode, &blocks);
3484 if (ret < 0)
3485 return ret;
3486
3487 return put_user(blocks, (u64 __user *)arg);
3488 }
3489
release_compress_blocks(struct dnode_of_data * dn,pgoff_t count)3490 static int release_compress_blocks(struct dnode_of_data *dn, pgoff_t count)
3491 {
3492 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
3493 unsigned int released_blocks = 0;
3494 int cluster_size = F2FS_I(dn->inode)->i_cluster_size;
3495 block_t blkaddr;
3496 int i;
3497
3498 for (i = 0; i < count; i++) {
3499 blkaddr = data_blkaddr(dn->inode, dn->node_page,
3500 dn->ofs_in_node + i);
3501
3502 if (!__is_valid_data_blkaddr(blkaddr))
3503 continue;
3504 if (unlikely(!f2fs_is_valid_blkaddr(sbi, blkaddr,
3505 DATA_GENERIC_ENHANCE)))
3506 return -EFSCORRUPTED;
3507 }
3508
3509 while (count) {
3510 int compr_blocks = 0;
3511
3512 for (i = 0; i < cluster_size; i++, dn->ofs_in_node++) {
3513 blkaddr = f2fs_data_blkaddr(dn);
3514
3515 if (i == 0) {
3516 if (blkaddr == COMPRESS_ADDR)
3517 continue;
3518 dn->ofs_in_node += cluster_size;
3519 goto next;
3520 }
3521
3522 if (__is_valid_data_blkaddr(blkaddr))
3523 compr_blocks++;
3524
3525 if (blkaddr != NEW_ADDR)
3526 continue;
3527
3528 f2fs_set_data_blkaddr(dn, NULL_ADDR);
3529 }
3530
3531 f2fs_i_compr_blocks_update(dn->inode, compr_blocks, false);
3532 dec_valid_block_count(sbi, dn->inode,
3533 cluster_size - compr_blocks);
3534
3535 released_blocks += cluster_size - compr_blocks;
3536 next:
3537 count -= cluster_size;
3538 }
3539
3540 return released_blocks;
3541 }
3542
f2fs_release_compress_blocks(struct file * filp,unsigned long arg)3543 static int f2fs_release_compress_blocks(struct file *filp, unsigned long arg)
3544 {
3545 struct inode *inode = file_inode(filp);
3546 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3547 pgoff_t page_idx = 0, last_idx;
3548 unsigned int released_blocks = 0;
3549 int ret;
3550 int writecount;
3551
3552 if (!f2fs_sb_has_compression(sbi))
3553 return -EOPNOTSUPP;
3554
3555 if (f2fs_readonly(sbi->sb))
3556 return -EROFS;
3557
3558 ret = mnt_want_write_file(filp);
3559 if (ret)
3560 return ret;
3561
3562 f2fs_balance_fs(sbi, true);
3563
3564 inode_lock(inode);
3565
3566 writecount = atomic_read(&inode->i_writecount);
3567 if ((filp->f_mode & FMODE_WRITE && writecount != 1) ||
3568 (!(filp->f_mode & FMODE_WRITE) && writecount)) {
3569 ret = -EBUSY;
3570 goto out;
3571 }
3572
3573 if (!f2fs_compressed_file(inode) ||
3574 is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) {
3575 ret = -EINVAL;
3576 goto out;
3577 }
3578
3579 ret = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX);
3580 if (ret)
3581 goto out;
3582
3583 if (!atomic_read(&F2FS_I(inode)->i_compr_blocks)) {
3584 ret = -EPERM;
3585 goto out;
3586 }
3587
3588 set_inode_flag(inode, FI_COMPRESS_RELEASED);
3589 inode_set_ctime_current(inode);
3590 f2fs_mark_inode_dirty_sync(inode, true);
3591
3592 f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
3593 filemap_invalidate_lock(inode->i_mapping);
3594
3595 last_idx = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE);
3596
3597 while (page_idx < last_idx) {
3598 struct dnode_of_data dn;
3599 pgoff_t end_offset, count;
3600
3601 f2fs_lock_op(sbi);
3602
3603 set_new_dnode(&dn, inode, NULL, NULL, 0);
3604 ret = f2fs_get_dnode_of_data(&dn, page_idx, LOOKUP_NODE);
3605 if (ret) {
3606 f2fs_unlock_op(sbi);
3607 if (ret == -ENOENT) {
3608 page_idx = f2fs_get_next_page_offset(&dn,
3609 page_idx);
3610 ret = 0;
3611 continue;
3612 }
3613 break;
3614 }
3615
3616 end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
3617 count = min(end_offset - dn.ofs_in_node, last_idx - page_idx);
3618 count = round_up(count, F2FS_I(inode)->i_cluster_size);
3619
3620 ret = release_compress_blocks(&dn, count);
3621
3622 f2fs_put_dnode(&dn);
3623
3624 f2fs_unlock_op(sbi);
3625
3626 if (ret < 0)
3627 break;
3628
3629 page_idx += count;
3630 released_blocks += ret;
3631 }
3632
3633 filemap_invalidate_unlock(inode->i_mapping);
3634 f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
3635 out:
3636 if (released_blocks)
3637 f2fs_update_time(sbi, REQ_TIME);
3638 inode_unlock(inode);
3639
3640 mnt_drop_write_file(filp);
3641
3642 if (ret >= 0) {
3643 ret = put_user(released_blocks, (u64 __user *)arg);
3644 } else if (released_blocks &&
3645 atomic_read(&F2FS_I(inode)->i_compr_blocks)) {
3646 set_sbi_flag(sbi, SBI_NEED_FSCK);
3647 f2fs_warn(sbi, "%s: partial blocks were released i_ino=%lx "
3648 "iblocks=%llu, released=%u, compr_blocks=%u, "
3649 "run fsck to fix.",
3650 __func__, inode->i_ino, inode->i_blocks,
3651 released_blocks,
3652 atomic_read(&F2FS_I(inode)->i_compr_blocks));
3653 }
3654
3655 return ret;
3656 }
3657
reserve_compress_blocks(struct dnode_of_data * dn,pgoff_t count,unsigned int * reserved_blocks)3658 static int reserve_compress_blocks(struct dnode_of_data *dn, pgoff_t count,
3659 unsigned int *reserved_blocks)
3660 {
3661 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
3662 int cluster_size = F2FS_I(dn->inode)->i_cluster_size;
3663 block_t blkaddr;
3664 int i;
3665
3666 for (i = 0; i < count; i++) {
3667 blkaddr = data_blkaddr(dn->inode, dn->node_page,
3668 dn->ofs_in_node + i);
3669
3670 if (!__is_valid_data_blkaddr(blkaddr))
3671 continue;
3672 if (unlikely(!f2fs_is_valid_blkaddr(sbi, blkaddr,
3673 DATA_GENERIC_ENHANCE)))
3674 return -EFSCORRUPTED;
3675 }
3676
3677 while (count) {
3678 int compr_blocks = 0;
3679 blkcnt_t reserved = 0;
3680 blkcnt_t to_reserved;
3681 int ret;
3682
3683 for (i = 0; i < cluster_size; i++) {
3684 blkaddr = data_blkaddr(dn->inode, dn->node_page,
3685 dn->ofs_in_node + i);
3686
3687 if (i == 0) {
3688 if (blkaddr != COMPRESS_ADDR) {
3689 dn->ofs_in_node += cluster_size;
3690 goto next;
3691 }
3692 continue;
3693 }
3694
3695 /*
3696 * compressed cluster was not released due to it
3697 * fails in release_compress_blocks(), so NEW_ADDR
3698 * is a possible case.
3699 */
3700 if (blkaddr == NEW_ADDR) {
3701 reserved++;
3702 continue;
3703 }
3704 if (__is_valid_data_blkaddr(blkaddr)) {
3705 compr_blocks++;
3706 continue;
3707 }
3708 }
3709
3710 to_reserved = cluster_size - compr_blocks - reserved;
3711
3712 /* for the case all blocks in cluster were reserved */
3713 if (to_reserved == 1) {
3714 dn->ofs_in_node += cluster_size;
3715 goto next;
3716 }
3717
3718 ret = inc_valid_block_count(sbi, dn->inode,
3719 &to_reserved, false);
3720 if (unlikely(ret))
3721 return ret;
3722
3723 for (i = 0; i < cluster_size; i++, dn->ofs_in_node++) {
3724 if (f2fs_data_blkaddr(dn) == NULL_ADDR)
3725 f2fs_set_data_blkaddr(dn, NEW_ADDR);
3726 }
3727
3728 f2fs_i_compr_blocks_update(dn->inode, compr_blocks, true);
3729
3730 *reserved_blocks += to_reserved;
3731 next:
3732 count -= cluster_size;
3733 }
3734
3735 return 0;
3736 }
3737
f2fs_reserve_compress_blocks(struct file * filp,unsigned long arg)3738 static int f2fs_reserve_compress_blocks(struct file *filp, unsigned long arg)
3739 {
3740 struct inode *inode = file_inode(filp);
3741 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3742 pgoff_t page_idx = 0, last_idx;
3743 unsigned int reserved_blocks = 0;
3744 int ret;
3745
3746 if (!f2fs_sb_has_compression(sbi))
3747 return -EOPNOTSUPP;
3748
3749 if (f2fs_readonly(sbi->sb))
3750 return -EROFS;
3751
3752 ret = mnt_want_write_file(filp);
3753 if (ret)
3754 return ret;
3755
3756 f2fs_balance_fs(sbi, true);
3757
3758 inode_lock(inode);
3759
3760 if (!f2fs_compressed_file(inode) ||
3761 !is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) {
3762 ret = -EINVAL;
3763 goto unlock_inode;
3764 }
3765
3766 if (atomic_read(&F2FS_I(inode)->i_compr_blocks))
3767 goto unlock_inode;
3768
3769 f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
3770 filemap_invalidate_lock(inode->i_mapping);
3771
3772 last_idx = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE);
3773
3774 while (page_idx < last_idx) {
3775 struct dnode_of_data dn;
3776 pgoff_t end_offset, count;
3777
3778 f2fs_lock_op(sbi);
3779
3780 set_new_dnode(&dn, inode, NULL, NULL, 0);
3781 ret = f2fs_get_dnode_of_data(&dn, page_idx, LOOKUP_NODE);
3782 if (ret) {
3783 f2fs_unlock_op(sbi);
3784 if (ret == -ENOENT) {
3785 page_idx = f2fs_get_next_page_offset(&dn,
3786 page_idx);
3787 ret = 0;
3788 continue;
3789 }
3790 break;
3791 }
3792
3793 end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
3794 count = min(end_offset - dn.ofs_in_node, last_idx - page_idx);
3795 count = round_up(count, F2FS_I(inode)->i_cluster_size);
3796
3797 ret = reserve_compress_blocks(&dn, count, &reserved_blocks);
3798
3799 f2fs_put_dnode(&dn);
3800
3801 f2fs_unlock_op(sbi);
3802
3803 if (ret < 0)
3804 break;
3805
3806 page_idx += count;
3807 }
3808
3809 filemap_invalidate_unlock(inode->i_mapping);
3810 f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
3811
3812 if (!ret) {
3813 clear_inode_flag(inode, FI_COMPRESS_RELEASED);
3814 inode_set_ctime_current(inode);
3815 f2fs_mark_inode_dirty_sync(inode, true);
3816 }
3817 unlock_inode:
3818 if (reserved_blocks)
3819 f2fs_update_time(sbi, REQ_TIME);
3820 inode_unlock(inode);
3821 mnt_drop_write_file(filp);
3822
3823 if (!ret) {
3824 ret = put_user(reserved_blocks, (u64 __user *)arg);
3825 } else if (reserved_blocks &&
3826 atomic_read(&F2FS_I(inode)->i_compr_blocks)) {
3827 set_sbi_flag(sbi, SBI_NEED_FSCK);
3828 f2fs_warn(sbi, "%s: partial blocks were reserved i_ino=%lx "
3829 "iblocks=%llu, reserved=%u, compr_blocks=%u, "
3830 "run fsck to fix.",
3831 __func__, inode->i_ino, inode->i_blocks,
3832 reserved_blocks,
3833 atomic_read(&F2FS_I(inode)->i_compr_blocks));
3834 }
3835
3836 return ret;
3837 }
3838
f2fs_secure_erase(struct block_device * bdev,struct inode * inode,pgoff_t off,block_t block,block_t len,u32 flags)3839 static int f2fs_secure_erase(struct block_device *bdev, struct inode *inode,
3840 pgoff_t off, block_t block, block_t len, u32 flags)
3841 {
3842 sector_t sector = SECTOR_FROM_BLOCK(block);
3843 sector_t nr_sects = SECTOR_FROM_BLOCK(len);
3844 int ret = 0;
3845
3846 if (flags & F2FS_TRIM_FILE_DISCARD) {
3847 if (bdev_max_secure_erase_sectors(bdev))
3848 ret = blkdev_issue_secure_erase(bdev, sector, nr_sects,
3849 GFP_NOFS);
3850 else
3851 ret = blkdev_issue_discard(bdev, sector, nr_sects,
3852 GFP_NOFS);
3853 }
3854
3855 if (!ret && (flags & F2FS_TRIM_FILE_ZEROOUT)) {
3856 if (IS_ENCRYPTED(inode))
3857 ret = fscrypt_zeroout_range(inode, off, block, len);
3858 else
3859 ret = blkdev_issue_zeroout(bdev, sector, nr_sects,
3860 GFP_NOFS, 0);
3861 }
3862
3863 return ret;
3864 }
3865
f2fs_sec_trim_file(struct file * filp,unsigned long arg)3866 static int f2fs_sec_trim_file(struct file *filp, unsigned long arg)
3867 {
3868 struct inode *inode = file_inode(filp);
3869 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3870 struct address_space *mapping = inode->i_mapping;
3871 struct block_device *prev_bdev = NULL;
3872 struct f2fs_sectrim_range range;
3873 pgoff_t index, pg_end, prev_index = 0;
3874 block_t prev_block = 0, len = 0;
3875 loff_t end_addr;
3876 bool to_end = false;
3877 int ret = 0;
3878
3879 if (!(filp->f_mode & FMODE_WRITE))
3880 return -EBADF;
3881
3882 if (copy_from_user(&range, (struct f2fs_sectrim_range __user *)arg,
3883 sizeof(range)))
3884 return -EFAULT;
3885
3886 if (range.flags == 0 || (range.flags & ~F2FS_TRIM_FILE_MASK) ||
3887 !S_ISREG(inode->i_mode))
3888 return -EINVAL;
3889
3890 if (((range.flags & F2FS_TRIM_FILE_DISCARD) &&
3891 !f2fs_hw_support_discard(sbi)) ||
3892 ((range.flags & F2FS_TRIM_FILE_ZEROOUT) &&
3893 IS_ENCRYPTED(inode) && f2fs_is_multi_device(sbi)))
3894 return -EOPNOTSUPP;
3895
3896 file_start_write(filp);
3897 inode_lock(inode);
3898
3899 if (f2fs_is_atomic_file(inode) || f2fs_compressed_file(inode) ||
3900 range.start >= inode->i_size) {
3901 ret = -EINVAL;
3902 goto err;
3903 }
3904
3905 if (range.len == 0)
3906 goto err;
3907
3908 if (inode->i_size - range.start > range.len) {
3909 end_addr = range.start + range.len;
3910 } else {
3911 end_addr = range.len == (u64)-1 ?
3912 sbi->sb->s_maxbytes : inode->i_size;
3913 to_end = true;
3914 }
3915
3916 if (!IS_ALIGNED(range.start, F2FS_BLKSIZE) ||
3917 (!to_end && !IS_ALIGNED(end_addr, F2FS_BLKSIZE))) {
3918 ret = -EINVAL;
3919 goto err;
3920 }
3921
3922 index = F2FS_BYTES_TO_BLK(range.start);
3923 pg_end = DIV_ROUND_UP(end_addr, F2FS_BLKSIZE);
3924
3925 ret = f2fs_convert_inline_inode(inode);
3926 if (ret)
3927 goto err;
3928
3929 f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
3930 filemap_invalidate_lock(mapping);
3931
3932 ret = filemap_write_and_wait_range(mapping, range.start,
3933 to_end ? LLONG_MAX : end_addr - 1);
3934 if (ret)
3935 goto out;
3936
3937 truncate_inode_pages_range(mapping, range.start,
3938 to_end ? -1 : end_addr - 1);
3939
3940 while (index < pg_end) {
3941 struct dnode_of_data dn;
3942 pgoff_t end_offset, count;
3943 int i;
3944
3945 set_new_dnode(&dn, inode, NULL, NULL, 0);
3946 ret = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE);
3947 if (ret) {
3948 if (ret == -ENOENT) {
3949 index = f2fs_get_next_page_offset(&dn, index);
3950 continue;
3951 }
3952 goto out;
3953 }
3954
3955 end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
3956 count = min(end_offset - dn.ofs_in_node, pg_end - index);
3957 for (i = 0; i < count; i++, index++, dn.ofs_in_node++) {
3958 struct block_device *cur_bdev;
3959 block_t blkaddr = f2fs_data_blkaddr(&dn);
3960
3961 if (!__is_valid_data_blkaddr(blkaddr))
3962 continue;
3963
3964 if (!f2fs_is_valid_blkaddr(sbi, blkaddr,
3965 DATA_GENERIC_ENHANCE)) {
3966 ret = -EFSCORRUPTED;
3967 f2fs_put_dnode(&dn);
3968 goto out;
3969 }
3970
3971 cur_bdev = f2fs_target_device(sbi, blkaddr, NULL);
3972 if (f2fs_is_multi_device(sbi)) {
3973 int di = f2fs_target_device_index(sbi, blkaddr);
3974
3975 blkaddr -= FDEV(di).start_blk;
3976 }
3977
3978 if (len) {
3979 if (prev_bdev == cur_bdev &&
3980 index == prev_index + len &&
3981 blkaddr == prev_block + len) {
3982 len++;
3983 } else {
3984 ret = f2fs_secure_erase(prev_bdev,
3985 inode, prev_index, prev_block,
3986 len, range.flags);
3987 if (ret) {
3988 f2fs_put_dnode(&dn);
3989 goto out;
3990 }
3991
3992 len = 0;
3993 }
3994 }
3995
3996 if (!len) {
3997 prev_bdev = cur_bdev;
3998 prev_index = index;
3999 prev_block = blkaddr;
4000 len = 1;
4001 }
4002 }
4003
4004 f2fs_put_dnode(&dn);
4005
4006 if (fatal_signal_pending(current)) {
4007 ret = -EINTR;
4008 goto out;
4009 }
4010 cond_resched();
4011 }
4012
4013 if (len)
4014 ret = f2fs_secure_erase(prev_bdev, inode, prev_index,
4015 prev_block, len, range.flags);
4016 f2fs_update_time(sbi, REQ_TIME);
4017 out:
4018 filemap_invalidate_unlock(mapping);
4019 f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
4020 err:
4021 inode_unlock(inode);
4022 file_end_write(filp);
4023
4024 return ret;
4025 }
4026
f2fs_ioc_get_compress_option(struct file * filp,unsigned long arg)4027 static int f2fs_ioc_get_compress_option(struct file *filp, unsigned long arg)
4028 {
4029 struct inode *inode = file_inode(filp);
4030 struct f2fs_comp_option option;
4031
4032 if (!f2fs_sb_has_compression(F2FS_I_SB(inode)))
4033 return -EOPNOTSUPP;
4034
4035 inode_lock_shared(inode);
4036
4037 if (!f2fs_compressed_file(inode)) {
4038 inode_unlock_shared(inode);
4039 return -ENODATA;
4040 }
4041
4042 option.algorithm = F2FS_I(inode)->i_compress_algorithm;
4043 option.log_cluster_size = F2FS_I(inode)->i_log_cluster_size;
4044
4045 inode_unlock_shared(inode);
4046
4047 if (copy_to_user((struct f2fs_comp_option __user *)arg, &option,
4048 sizeof(option)))
4049 return -EFAULT;
4050
4051 return 0;
4052 }
4053
f2fs_ioc_set_compress_option(struct file * filp,unsigned long arg)4054 static int f2fs_ioc_set_compress_option(struct file *filp, unsigned long arg)
4055 {
4056 struct inode *inode = file_inode(filp);
4057 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
4058 struct f2fs_comp_option option;
4059 int ret = 0;
4060
4061 if (!f2fs_sb_has_compression(sbi))
4062 return -EOPNOTSUPP;
4063
4064 if (!(filp->f_mode & FMODE_WRITE))
4065 return -EBADF;
4066
4067 if (copy_from_user(&option, (struct f2fs_comp_option __user *)arg,
4068 sizeof(option)))
4069 return -EFAULT;
4070
4071 if (option.log_cluster_size < MIN_COMPRESS_LOG_SIZE ||
4072 option.log_cluster_size > MAX_COMPRESS_LOG_SIZE ||
4073 option.algorithm >= COMPRESS_MAX)
4074 return -EINVAL;
4075
4076 file_start_write(filp);
4077 inode_lock(inode);
4078
4079 f2fs_down_write(&F2FS_I(inode)->i_sem);
4080 if (!f2fs_compressed_file(inode)) {
4081 ret = -EINVAL;
4082 goto out;
4083 }
4084
4085 if (f2fs_is_mmap_file(inode) || get_dirty_pages(inode)) {
4086 ret = -EBUSY;
4087 goto out;
4088 }
4089
4090 if (F2FS_HAS_BLOCKS(inode)) {
4091 ret = -EFBIG;
4092 goto out;
4093 }
4094
4095 F2FS_I(inode)->i_compress_algorithm = option.algorithm;
4096 F2FS_I(inode)->i_log_cluster_size = option.log_cluster_size;
4097 F2FS_I(inode)->i_cluster_size = BIT(option.log_cluster_size);
4098 /* Set default level */
4099 if (F2FS_I(inode)->i_compress_algorithm == COMPRESS_ZSTD)
4100 F2FS_I(inode)->i_compress_level = F2FS_ZSTD_DEFAULT_CLEVEL;
4101 else
4102 F2FS_I(inode)->i_compress_level = 0;
4103 /* Adjust mount option level */
4104 if (option.algorithm == F2FS_OPTION(sbi).compress_algorithm &&
4105 F2FS_OPTION(sbi).compress_level)
4106 F2FS_I(inode)->i_compress_level = F2FS_OPTION(sbi).compress_level;
4107 f2fs_mark_inode_dirty_sync(inode, true);
4108
4109 if (!f2fs_is_compress_backend_ready(inode))
4110 f2fs_warn(sbi, "compression algorithm is successfully set, "
4111 "but current kernel doesn't support this algorithm.");
4112 out:
4113 f2fs_up_write(&F2FS_I(inode)->i_sem);
4114 inode_unlock(inode);
4115 file_end_write(filp);
4116
4117 return ret;
4118 }
4119
redirty_blocks(struct inode * inode,pgoff_t page_idx,int len)4120 static int redirty_blocks(struct inode *inode, pgoff_t page_idx, int len)
4121 {
4122 DEFINE_READAHEAD(ractl, NULL, NULL, inode->i_mapping, page_idx);
4123 struct address_space *mapping = inode->i_mapping;
4124 struct page *page;
4125 pgoff_t redirty_idx = page_idx;
4126 int i, page_len = 0, ret = 0;
4127
4128 page_cache_ra_unbounded(&ractl, len, 0);
4129
4130 for (i = 0; i < len; i++, page_idx++) {
4131 page = read_cache_page(mapping, page_idx, NULL, NULL);
4132 if (IS_ERR(page)) {
4133 ret = PTR_ERR(page);
4134 break;
4135 }
4136 page_len++;
4137 }
4138
4139 for (i = 0; i < page_len; i++, redirty_idx++) {
4140 page = find_lock_page(mapping, redirty_idx);
4141
4142 /* It will never fail, when page has pinned above */
4143 f2fs_bug_on(F2FS_I_SB(inode), !page);
4144
4145 set_page_dirty(page);
4146 set_page_private_gcing(page);
4147 f2fs_put_page(page, 1);
4148 f2fs_put_page(page, 0);
4149 }
4150
4151 return ret;
4152 }
4153
f2fs_ioc_decompress_file(struct file * filp)4154 static int f2fs_ioc_decompress_file(struct file *filp)
4155 {
4156 struct inode *inode = file_inode(filp);
4157 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
4158 struct f2fs_inode_info *fi = F2FS_I(inode);
4159 pgoff_t page_idx = 0, last_idx;
4160 int cluster_size = fi->i_cluster_size;
4161 int count, ret;
4162
4163 if (!f2fs_sb_has_compression(sbi) ||
4164 F2FS_OPTION(sbi).compress_mode != COMPR_MODE_USER)
4165 return -EOPNOTSUPP;
4166
4167 if (!(filp->f_mode & FMODE_WRITE))
4168 return -EBADF;
4169
4170 f2fs_balance_fs(sbi, true);
4171
4172 file_start_write(filp);
4173 inode_lock(inode);
4174
4175 if (!f2fs_is_compress_backend_ready(inode)) {
4176 ret = -EOPNOTSUPP;
4177 goto out;
4178 }
4179
4180 if (!f2fs_compressed_file(inode) ||
4181 is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) {
4182 ret = -EINVAL;
4183 goto out;
4184 }
4185
4186 ret = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX);
4187 if (ret)
4188 goto out;
4189
4190 if (!atomic_read(&fi->i_compr_blocks))
4191 goto out;
4192
4193 last_idx = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE);
4194
4195 count = last_idx - page_idx;
4196 while (count && count >= cluster_size) {
4197 ret = redirty_blocks(inode, page_idx, cluster_size);
4198 if (ret < 0)
4199 break;
4200
4201 if (get_dirty_pages(inode) >= BLKS_PER_SEG(sbi)) {
4202 ret = filemap_fdatawrite(inode->i_mapping);
4203 if (ret < 0)
4204 break;
4205 }
4206
4207 count -= cluster_size;
4208 page_idx += cluster_size;
4209
4210 cond_resched();
4211 if (fatal_signal_pending(current)) {
4212 ret = -EINTR;
4213 break;
4214 }
4215 }
4216
4217 if (!ret)
4218 ret = filemap_write_and_wait_range(inode->i_mapping, 0,
4219 LLONG_MAX);
4220
4221 if (ret)
4222 f2fs_warn(sbi, "%s: The file might be partially decompressed (errno=%d). Please delete the file.",
4223 __func__, ret);
4224 f2fs_update_time(sbi, REQ_TIME);
4225 out:
4226 inode_unlock(inode);
4227 file_end_write(filp);
4228
4229 return ret;
4230 }
4231
f2fs_ioc_compress_file(struct file * filp)4232 static int f2fs_ioc_compress_file(struct file *filp)
4233 {
4234 struct inode *inode = file_inode(filp);
4235 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
4236 pgoff_t page_idx = 0, last_idx;
4237 int cluster_size = F2FS_I(inode)->i_cluster_size;
4238 int count, ret;
4239
4240 if (!f2fs_sb_has_compression(sbi) ||
4241 F2FS_OPTION(sbi).compress_mode != COMPR_MODE_USER)
4242 return -EOPNOTSUPP;
4243
4244 if (!(filp->f_mode & FMODE_WRITE))
4245 return -EBADF;
4246
4247 f2fs_balance_fs(sbi, true);
4248
4249 file_start_write(filp);
4250 inode_lock(inode);
4251
4252 if (!f2fs_is_compress_backend_ready(inode)) {
4253 ret = -EOPNOTSUPP;
4254 goto out;
4255 }
4256
4257 if (!f2fs_compressed_file(inode) ||
4258 is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) {
4259 ret = -EINVAL;
4260 goto out;
4261 }
4262
4263 ret = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX);
4264 if (ret)
4265 goto out;
4266
4267 set_inode_flag(inode, FI_ENABLE_COMPRESS);
4268
4269 last_idx = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE);
4270
4271 count = last_idx - page_idx;
4272 while (count && count >= cluster_size) {
4273 ret = redirty_blocks(inode, page_idx, cluster_size);
4274 if (ret < 0)
4275 break;
4276
4277 if (get_dirty_pages(inode) >= BLKS_PER_SEG(sbi)) {
4278 ret = filemap_fdatawrite(inode->i_mapping);
4279 if (ret < 0)
4280 break;
4281 }
4282
4283 count -= cluster_size;
4284 page_idx += cluster_size;
4285
4286 cond_resched();
4287 if (fatal_signal_pending(current)) {
4288 ret = -EINTR;
4289 break;
4290 }
4291 }
4292
4293 if (!ret)
4294 ret = filemap_write_and_wait_range(inode->i_mapping, 0,
4295 LLONG_MAX);
4296
4297 clear_inode_flag(inode, FI_ENABLE_COMPRESS);
4298
4299 if (ret)
4300 f2fs_warn(sbi, "%s: The file might be partially compressed (errno=%d). Please delete the file.",
4301 __func__, ret);
4302 f2fs_update_time(sbi, REQ_TIME);
4303 out:
4304 inode_unlock(inode);
4305 file_end_write(filp);
4306
4307 return ret;
4308 }
4309
__f2fs_ioctl(struct file * filp,unsigned int cmd,unsigned long arg)4310 static long __f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
4311 {
4312 switch (cmd) {
4313 case FS_IOC_GETVERSION:
4314 return f2fs_ioc_getversion(filp, arg);
4315 case F2FS_IOC_START_ATOMIC_WRITE:
4316 return f2fs_ioc_start_atomic_write(filp, false);
4317 case F2FS_IOC_START_ATOMIC_REPLACE:
4318 return f2fs_ioc_start_atomic_write(filp, true);
4319 case F2FS_IOC_COMMIT_ATOMIC_WRITE:
4320 return f2fs_ioc_commit_atomic_write(filp);
4321 case F2FS_IOC_ABORT_ATOMIC_WRITE:
4322 return f2fs_ioc_abort_atomic_write(filp);
4323 case F2FS_IOC_START_VOLATILE_WRITE:
4324 case F2FS_IOC_RELEASE_VOLATILE_WRITE:
4325 return -EOPNOTSUPP;
4326 case F2FS_IOC_SHUTDOWN:
4327 return f2fs_ioc_shutdown(filp, arg);
4328 case FITRIM:
4329 return f2fs_ioc_fitrim(filp, arg);
4330 case FS_IOC_SET_ENCRYPTION_POLICY:
4331 return f2fs_ioc_set_encryption_policy(filp, arg);
4332 case FS_IOC_GET_ENCRYPTION_POLICY:
4333 return f2fs_ioc_get_encryption_policy(filp, arg);
4334 case FS_IOC_GET_ENCRYPTION_PWSALT:
4335 return f2fs_ioc_get_encryption_pwsalt(filp, arg);
4336 case FS_IOC_GET_ENCRYPTION_POLICY_EX:
4337 return f2fs_ioc_get_encryption_policy_ex(filp, arg);
4338 case FS_IOC_ADD_ENCRYPTION_KEY:
4339 return f2fs_ioc_add_encryption_key(filp, arg);
4340 case FS_IOC_REMOVE_ENCRYPTION_KEY:
4341 return f2fs_ioc_remove_encryption_key(filp, arg);
4342 case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
4343 return f2fs_ioc_remove_encryption_key_all_users(filp, arg);
4344 case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
4345 return f2fs_ioc_get_encryption_key_status(filp, arg);
4346 case FS_IOC_GET_ENCRYPTION_NONCE:
4347 return f2fs_ioc_get_encryption_nonce(filp, arg);
4348 case F2FS_IOC_GARBAGE_COLLECT:
4349 return f2fs_ioc_gc(filp, arg);
4350 case F2FS_IOC_GARBAGE_COLLECT_RANGE:
4351 return f2fs_ioc_gc_range(filp, arg);
4352 case F2FS_IOC_WRITE_CHECKPOINT:
4353 return f2fs_ioc_write_checkpoint(filp);
4354 case F2FS_IOC_DEFRAGMENT:
4355 return f2fs_ioc_defragment(filp, arg);
4356 case F2FS_IOC_MOVE_RANGE:
4357 return f2fs_ioc_move_range(filp, arg);
4358 case F2FS_IOC_FLUSH_DEVICE:
4359 return f2fs_ioc_flush_device(filp, arg);
4360 case F2FS_IOC_GET_FEATURES:
4361 return f2fs_ioc_get_features(filp, arg);
4362 case F2FS_IOC_GET_PIN_FILE:
4363 return f2fs_ioc_get_pin_file(filp, arg);
4364 case F2FS_IOC_SET_PIN_FILE:
4365 return f2fs_ioc_set_pin_file(filp, arg);
4366 case F2FS_IOC_PRECACHE_EXTENTS:
4367 return f2fs_ioc_precache_extents(filp);
4368 case F2FS_IOC_RESIZE_FS:
4369 return f2fs_ioc_resize_fs(filp, arg);
4370 case FS_IOC_ENABLE_VERITY:
4371 return f2fs_ioc_enable_verity(filp, arg);
4372 case FS_IOC_MEASURE_VERITY:
4373 return f2fs_ioc_measure_verity(filp, arg);
4374 case FS_IOC_READ_VERITY_METADATA:
4375 return f2fs_ioc_read_verity_metadata(filp, arg);
4376 case FS_IOC_GETFSLABEL:
4377 return f2fs_ioc_getfslabel(filp, arg);
4378 case FS_IOC_SETFSLABEL:
4379 return f2fs_ioc_setfslabel(filp, arg);
4380 case F2FS_IOC_GET_COMPRESS_BLOCKS:
4381 return f2fs_ioc_get_compress_blocks(filp, arg);
4382 case F2FS_IOC_RELEASE_COMPRESS_BLOCKS:
4383 return f2fs_release_compress_blocks(filp, arg);
4384 case F2FS_IOC_RESERVE_COMPRESS_BLOCKS:
4385 return f2fs_reserve_compress_blocks(filp, arg);
4386 case F2FS_IOC_SEC_TRIM_FILE:
4387 return f2fs_sec_trim_file(filp, arg);
4388 case F2FS_IOC_GET_COMPRESS_OPTION:
4389 return f2fs_ioc_get_compress_option(filp, arg);
4390 case F2FS_IOC_SET_COMPRESS_OPTION:
4391 return f2fs_ioc_set_compress_option(filp, arg);
4392 case F2FS_IOC_DECOMPRESS_FILE:
4393 return f2fs_ioc_decompress_file(filp);
4394 case F2FS_IOC_COMPRESS_FILE:
4395 return f2fs_ioc_compress_file(filp);
4396 default:
4397 return -ENOTTY;
4398 }
4399 }
4400
f2fs_ioctl(struct file * filp,unsigned int cmd,unsigned long arg)4401 long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
4402 {
4403 if (unlikely(f2fs_cp_error(F2FS_I_SB(file_inode(filp)))))
4404 return -EIO;
4405 if (!f2fs_is_checkpoint_ready(F2FS_I_SB(file_inode(filp))))
4406 return -ENOSPC;
4407
4408 return __f2fs_ioctl(filp, cmd, arg);
4409 }
4410
4411 /*
4412 * Return %true if the given read or write request should use direct I/O, or
4413 * %false if it should use buffered I/O.
4414 */
f2fs_should_use_dio(struct inode * inode,struct kiocb * iocb,struct iov_iter * iter)4415 static bool f2fs_should_use_dio(struct inode *inode, struct kiocb *iocb,
4416 struct iov_iter *iter)
4417 {
4418 unsigned int align;
4419
4420 if (!(iocb->ki_flags & IOCB_DIRECT))
4421 return false;
4422
4423 if (f2fs_force_buffered_io(inode, iov_iter_rw(iter)))
4424 return false;
4425
4426 /*
4427 * Direct I/O not aligned to the disk's logical_block_size will be
4428 * attempted, but will fail with -EINVAL.
4429 *
4430 * f2fs additionally requires that direct I/O be aligned to the
4431 * filesystem block size, which is often a stricter requirement.
4432 * However, f2fs traditionally falls back to buffered I/O on requests
4433 * that are logical_block_size-aligned but not fs-block aligned.
4434 *
4435 * The below logic implements this behavior.
4436 */
4437 align = iocb->ki_pos | iov_iter_alignment(iter);
4438 if (!IS_ALIGNED(align, i_blocksize(inode)) &&
4439 IS_ALIGNED(align, bdev_logical_block_size(inode->i_sb->s_bdev)))
4440 return false;
4441
4442 return true;
4443 }
4444
f2fs_dio_read_end_io(struct kiocb * iocb,ssize_t size,int error,unsigned int flags)4445 static int f2fs_dio_read_end_io(struct kiocb *iocb, ssize_t size, int error,
4446 unsigned int flags)
4447 {
4448 struct f2fs_sb_info *sbi = F2FS_I_SB(file_inode(iocb->ki_filp));
4449
4450 dec_page_count(sbi, F2FS_DIO_READ);
4451 if (error)
4452 return error;
4453 f2fs_update_iostat(sbi, NULL, APP_DIRECT_READ_IO, size);
4454 return 0;
4455 }
4456
4457 static const struct iomap_dio_ops f2fs_iomap_dio_read_ops = {
4458 .end_io = f2fs_dio_read_end_io,
4459 };
4460
f2fs_dio_read_iter(struct kiocb * iocb,struct iov_iter * to)4461 static ssize_t f2fs_dio_read_iter(struct kiocb *iocb, struct iov_iter *to)
4462 {
4463 struct file *file = iocb->ki_filp;
4464 struct inode *inode = file_inode(file);
4465 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
4466 struct f2fs_inode_info *fi = F2FS_I(inode);
4467 const loff_t pos = iocb->ki_pos;
4468 const size_t count = iov_iter_count(to);
4469 struct iomap_dio *dio;
4470 ssize_t ret;
4471
4472 if (count == 0)
4473 return 0; /* skip atime update */
4474
4475 trace_f2fs_direct_IO_enter(inode, iocb, count, READ);
4476
4477 if (iocb->ki_flags & IOCB_NOWAIT) {
4478 if (!f2fs_down_read_trylock(&fi->i_gc_rwsem[READ])) {
4479 ret = -EAGAIN;
4480 goto out;
4481 }
4482 } else {
4483 f2fs_down_read(&fi->i_gc_rwsem[READ]);
4484 }
4485
4486 /*
4487 * We have to use __iomap_dio_rw() and iomap_dio_complete() instead of
4488 * the higher-level function iomap_dio_rw() in order to ensure that the
4489 * F2FS_DIO_READ counter will be decremented correctly in all cases.
4490 */
4491 inc_page_count(sbi, F2FS_DIO_READ);
4492 dio = __iomap_dio_rw(iocb, to, &f2fs_iomap_ops,
4493 &f2fs_iomap_dio_read_ops, 0, NULL, 0);
4494 if (IS_ERR_OR_NULL(dio)) {
4495 ret = PTR_ERR_OR_ZERO(dio);
4496 if (ret != -EIOCBQUEUED)
4497 dec_page_count(sbi, F2FS_DIO_READ);
4498 } else {
4499 ret = iomap_dio_complete(dio);
4500 }
4501
4502 f2fs_up_read(&fi->i_gc_rwsem[READ]);
4503
4504 file_accessed(file);
4505 out:
4506 trace_f2fs_direct_IO_exit(inode, pos, count, READ, ret);
4507 return ret;
4508 }
4509
f2fs_trace_rw_file_path(struct file * file,loff_t pos,size_t count,int rw)4510 static void f2fs_trace_rw_file_path(struct file *file, loff_t pos, size_t count,
4511 int rw)
4512 {
4513 struct inode *inode = file_inode(file);
4514 char *buf, *path;
4515
4516 buf = f2fs_getname(F2FS_I_SB(inode));
4517 if (!buf)
4518 return;
4519 path = dentry_path_raw(file_dentry(file), buf, PATH_MAX);
4520 if (IS_ERR(path))
4521 goto free_buf;
4522 if (rw == WRITE)
4523 trace_f2fs_datawrite_start(inode, pos, count,
4524 current->pid, path, current->comm);
4525 else
4526 trace_f2fs_dataread_start(inode, pos, count,
4527 current->pid, path, current->comm);
4528 free_buf:
4529 f2fs_putname(buf);
4530 }
4531
f2fs_file_read_iter(struct kiocb * iocb,struct iov_iter * to)4532 static ssize_t f2fs_file_read_iter(struct kiocb *iocb, struct iov_iter *to)
4533 {
4534 struct inode *inode = file_inode(iocb->ki_filp);
4535 const loff_t pos = iocb->ki_pos;
4536 ssize_t ret;
4537
4538 if (!f2fs_is_compress_backend_ready(inode))
4539 return -EOPNOTSUPP;
4540
4541 if (trace_f2fs_dataread_start_enabled())
4542 f2fs_trace_rw_file_path(iocb->ki_filp, iocb->ki_pos,
4543 iov_iter_count(to), READ);
4544
4545 if (f2fs_should_use_dio(inode, iocb, to)) {
4546 ret = f2fs_dio_read_iter(iocb, to);
4547 } else {
4548 ret = filemap_read(iocb, to, 0);
4549 if (ret > 0)
4550 f2fs_update_iostat(F2FS_I_SB(inode), inode,
4551 APP_BUFFERED_READ_IO, ret);
4552 }
4553 if (trace_f2fs_dataread_end_enabled())
4554 trace_f2fs_dataread_end(inode, pos, ret);
4555 return ret;
4556 }
4557
f2fs_file_splice_read(struct file * in,loff_t * ppos,struct pipe_inode_info * pipe,size_t len,unsigned int flags)4558 static ssize_t f2fs_file_splice_read(struct file *in, loff_t *ppos,
4559 struct pipe_inode_info *pipe,
4560 size_t len, unsigned int flags)
4561 {
4562 struct inode *inode = file_inode(in);
4563 const loff_t pos = *ppos;
4564 ssize_t ret;
4565
4566 if (!f2fs_is_compress_backend_ready(inode))
4567 return -EOPNOTSUPP;
4568
4569 if (trace_f2fs_dataread_start_enabled())
4570 f2fs_trace_rw_file_path(in, pos, len, READ);
4571
4572 ret = filemap_splice_read(in, ppos, pipe, len, flags);
4573 if (ret > 0)
4574 f2fs_update_iostat(F2FS_I_SB(inode), inode,
4575 APP_BUFFERED_READ_IO, ret);
4576
4577 if (trace_f2fs_dataread_end_enabled())
4578 trace_f2fs_dataread_end(inode, pos, ret);
4579 return ret;
4580 }
4581
f2fs_write_checks(struct kiocb * iocb,struct iov_iter * from)4582 static ssize_t f2fs_write_checks(struct kiocb *iocb, struct iov_iter *from)
4583 {
4584 struct file *file = iocb->ki_filp;
4585 struct inode *inode = file_inode(file);
4586 ssize_t count;
4587 int err;
4588
4589 if (IS_IMMUTABLE(inode))
4590 return -EPERM;
4591
4592 if (is_inode_flag_set(inode, FI_COMPRESS_RELEASED))
4593 return -EPERM;
4594
4595 count = generic_write_checks(iocb, from);
4596 if (count <= 0)
4597 return count;
4598
4599 err = file_modified(file);
4600 if (err)
4601 return err;
4602 return count;
4603 }
4604
4605 /*
4606 * Preallocate blocks for a write request, if it is possible and helpful to do
4607 * so. Returns a positive number if blocks may have been preallocated, 0 if no
4608 * blocks were preallocated, or a negative errno value if something went
4609 * seriously wrong. Also sets FI_PREALLOCATED_ALL on the inode if *all* the
4610 * requested blocks (not just some of them) have been allocated.
4611 */
f2fs_preallocate_blocks(struct kiocb * iocb,struct iov_iter * iter,bool dio)4612 static int f2fs_preallocate_blocks(struct kiocb *iocb, struct iov_iter *iter,
4613 bool dio)
4614 {
4615 struct inode *inode = file_inode(iocb->ki_filp);
4616 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
4617 const loff_t pos = iocb->ki_pos;
4618 const size_t count = iov_iter_count(iter);
4619 struct f2fs_map_blocks map = {};
4620 int flag;
4621 int ret;
4622
4623 /* If it will be an out-of-place direct write, don't bother. */
4624 if (dio && f2fs_lfs_mode(sbi))
4625 return 0;
4626 /*
4627 * Don't preallocate holes aligned to DIO_SKIP_HOLES which turns into
4628 * buffered IO, if DIO meets any holes.
4629 */
4630 if (dio && i_size_read(inode) &&
4631 (F2FS_BYTES_TO_BLK(pos) < F2FS_BLK_ALIGN(i_size_read(inode))))
4632 return 0;
4633
4634 /* No-wait I/O can't allocate blocks. */
4635 if (iocb->ki_flags & IOCB_NOWAIT)
4636 return 0;
4637
4638 /* If it will be a short write, don't bother. */
4639 if (fault_in_iov_iter_readable(iter, count))
4640 return 0;
4641
4642 if (f2fs_has_inline_data(inode)) {
4643 /* If the data will fit inline, don't bother. */
4644 if (pos + count <= MAX_INLINE_DATA(inode))
4645 return 0;
4646 ret = f2fs_convert_inline_inode(inode);
4647 if (ret)
4648 return ret;
4649 }
4650
4651 /* Do not preallocate blocks that will be written partially in 4KB. */
4652 map.m_lblk = F2FS_BLK_ALIGN(pos);
4653 map.m_len = F2FS_BYTES_TO_BLK(pos + count);
4654 if (map.m_len > map.m_lblk)
4655 map.m_len -= map.m_lblk;
4656 else
4657 return 0;
4658
4659 map.m_may_create = true;
4660 if (dio) {
4661 map.m_seg_type = f2fs_rw_hint_to_seg_type(sbi,
4662 inode->i_write_hint);
4663 flag = F2FS_GET_BLOCK_PRE_DIO;
4664 } else {
4665 map.m_seg_type = NO_CHECK_TYPE;
4666 flag = F2FS_GET_BLOCK_PRE_AIO;
4667 }
4668
4669 ret = f2fs_map_blocks(inode, &map, flag);
4670 /* -ENOSPC|-EDQUOT are fine to report the number of allocated blocks. */
4671 if (ret < 0 && !((ret == -ENOSPC || ret == -EDQUOT) && map.m_len > 0))
4672 return ret;
4673 if (ret == 0)
4674 set_inode_flag(inode, FI_PREALLOCATED_ALL);
4675 return map.m_len;
4676 }
4677
f2fs_buffered_write_iter(struct kiocb * iocb,struct iov_iter * from)4678 static ssize_t f2fs_buffered_write_iter(struct kiocb *iocb,
4679 struct iov_iter *from)
4680 {
4681 struct file *file = iocb->ki_filp;
4682 struct inode *inode = file_inode(file);
4683 ssize_t ret;
4684
4685 if (iocb->ki_flags & IOCB_NOWAIT)
4686 return -EOPNOTSUPP;
4687
4688 ret = generic_perform_write(iocb, from);
4689
4690 if (ret > 0) {
4691 f2fs_update_iostat(F2FS_I_SB(inode), inode,
4692 APP_BUFFERED_IO, ret);
4693 }
4694 return ret;
4695 }
4696
f2fs_dio_write_end_io(struct kiocb * iocb,ssize_t size,int error,unsigned int flags)4697 static int f2fs_dio_write_end_io(struct kiocb *iocb, ssize_t size, int error,
4698 unsigned int flags)
4699 {
4700 struct f2fs_sb_info *sbi = F2FS_I_SB(file_inode(iocb->ki_filp));
4701
4702 dec_page_count(sbi, F2FS_DIO_WRITE);
4703 if (error)
4704 return error;
4705 f2fs_update_time(sbi, REQ_TIME);
4706 f2fs_update_iostat(sbi, NULL, APP_DIRECT_IO, size);
4707 return 0;
4708 }
4709
f2fs_dio_write_submit_io(const struct iomap_iter * iter,struct bio * bio,loff_t file_offset)4710 static void f2fs_dio_write_submit_io(const struct iomap_iter *iter,
4711 struct bio *bio, loff_t file_offset)
4712 {
4713 struct inode *inode = iter->inode;
4714 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
4715 int seg_type = f2fs_rw_hint_to_seg_type(sbi, inode->i_write_hint);
4716 enum temp_type temp = f2fs_get_segment_temp(seg_type);
4717
4718 bio->bi_write_hint = f2fs_io_type_to_rw_hint(sbi, DATA, temp);
4719 submit_bio(bio);
4720 }
4721
4722 static const struct iomap_dio_ops f2fs_iomap_dio_write_ops = {
4723 .end_io = f2fs_dio_write_end_io,
4724 .submit_io = f2fs_dio_write_submit_io,
4725 };
4726
f2fs_flush_buffered_write(struct address_space * mapping,loff_t start_pos,loff_t end_pos)4727 static void f2fs_flush_buffered_write(struct address_space *mapping,
4728 loff_t start_pos, loff_t end_pos)
4729 {
4730 int ret;
4731
4732 ret = filemap_write_and_wait_range(mapping, start_pos, end_pos);
4733 if (ret < 0)
4734 return;
4735 invalidate_mapping_pages(mapping,
4736 start_pos >> PAGE_SHIFT,
4737 end_pos >> PAGE_SHIFT);
4738 }
4739
f2fs_dio_write_iter(struct kiocb * iocb,struct iov_iter * from,bool * may_need_sync)4740 static ssize_t f2fs_dio_write_iter(struct kiocb *iocb, struct iov_iter *from,
4741 bool *may_need_sync)
4742 {
4743 struct file *file = iocb->ki_filp;
4744 struct inode *inode = file_inode(file);
4745 struct f2fs_inode_info *fi = F2FS_I(inode);
4746 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
4747 const bool do_opu = f2fs_lfs_mode(sbi);
4748 const loff_t pos = iocb->ki_pos;
4749 const ssize_t count = iov_iter_count(from);
4750 unsigned int dio_flags;
4751 struct iomap_dio *dio;
4752 ssize_t ret;
4753
4754 trace_f2fs_direct_IO_enter(inode, iocb, count, WRITE);
4755
4756 if (iocb->ki_flags & IOCB_NOWAIT) {
4757 /* f2fs_convert_inline_inode() and block allocation can block */
4758 if (f2fs_has_inline_data(inode) ||
4759 !f2fs_overwrite_io(inode, pos, count)) {
4760 ret = -EAGAIN;
4761 goto out;
4762 }
4763
4764 if (!f2fs_down_read_trylock(&fi->i_gc_rwsem[WRITE])) {
4765 ret = -EAGAIN;
4766 goto out;
4767 }
4768 if (do_opu && !f2fs_down_read_trylock(&fi->i_gc_rwsem[READ])) {
4769 f2fs_up_read(&fi->i_gc_rwsem[WRITE]);
4770 ret = -EAGAIN;
4771 goto out;
4772 }
4773 } else {
4774 ret = f2fs_convert_inline_inode(inode);
4775 if (ret)
4776 goto out;
4777
4778 f2fs_down_read(&fi->i_gc_rwsem[WRITE]);
4779 if (do_opu)
4780 f2fs_down_read(&fi->i_gc_rwsem[READ]);
4781 }
4782
4783 /*
4784 * We have to use __iomap_dio_rw() and iomap_dio_complete() instead of
4785 * the higher-level function iomap_dio_rw() in order to ensure that the
4786 * F2FS_DIO_WRITE counter will be decremented correctly in all cases.
4787 */
4788 inc_page_count(sbi, F2FS_DIO_WRITE);
4789 dio_flags = 0;
4790 if (pos + count > inode->i_size)
4791 dio_flags |= IOMAP_DIO_FORCE_WAIT;
4792 dio = __iomap_dio_rw(iocb, from, &f2fs_iomap_ops,
4793 &f2fs_iomap_dio_write_ops, dio_flags, NULL, 0);
4794 if (IS_ERR_OR_NULL(dio)) {
4795 ret = PTR_ERR_OR_ZERO(dio);
4796 if (ret == -ENOTBLK)
4797 ret = 0;
4798 if (ret != -EIOCBQUEUED)
4799 dec_page_count(sbi, F2FS_DIO_WRITE);
4800 } else {
4801 ret = iomap_dio_complete(dio);
4802 }
4803
4804 if (do_opu)
4805 f2fs_up_read(&fi->i_gc_rwsem[READ]);
4806 f2fs_up_read(&fi->i_gc_rwsem[WRITE]);
4807
4808 if (ret < 0)
4809 goto out;
4810 if (pos + ret > inode->i_size)
4811 f2fs_i_size_write(inode, pos + ret);
4812 if (!do_opu)
4813 set_inode_flag(inode, FI_UPDATE_WRITE);
4814
4815 if (iov_iter_count(from)) {
4816 ssize_t ret2;
4817 loff_t bufio_start_pos = iocb->ki_pos;
4818
4819 /*
4820 * The direct write was partial, so we need to fall back to a
4821 * buffered write for the remainder.
4822 */
4823
4824 ret2 = f2fs_buffered_write_iter(iocb, from);
4825 if (iov_iter_count(from))
4826 f2fs_write_failed(inode, iocb->ki_pos);
4827 if (ret2 < 0)
4828 goto out;
4829
4830 /*
4831 * Ensure that the pagecache pages are written to disk and
4832 * invalidated to preserve the expected O_DIRECT semantics.
4833 */
4834 if (ret2 > 0) {
4835 loff_t bufio_end_pos = bufio_start_pos + ret2 - 1;
4836
4837 ret += ret2;
4838
4839 f2fs_flush_buffered_write(file->f_mapping,
4840 bufio_start_pos,
4841 bufio_end_pos);
4842 }
4843 } else {
4844 /* iomap_dio_rw() already handled the generic_write_sync(). */
4845 *may_need_sync = false;
4846 }
4847 out:
4848 trace_f2fs_direct_IO_exit(inode, pos, count, WRITE, ret);
4849 return ret;
4850 }
4851
f2fs_file_write_iter(struct kiocb * iocb,struct iov_iter * from)4852 static ssize_t f2fs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
4853 {
4854 struct inode *inode = file_inode(iocb->ki_filp);
4855 const loff_t orig_pos = iocb->ki_pos;
4856 const size_t orig_count = iov_iter_count(from);
4857 loff_t target_size;
4858 bool dio;
4859 bool may_need_sync = true;
4860 int preallocated;
4861 const loff_t pos = iocb->ki_pos;
4862 const ssize_t count = iov_iter_count(from);
4863 ssize_t ret;
4864
4865 if (unlikely(f2fs_cp_error(F2FS_I_SB(inode)))) {
4866 ret = -EIO;
4867 goto out;
4868 }
4869
4870 if (!f2fs_is_compress_backend_ready(inode)) {
4871 ret = -EOPNOTSUPP;
4872 goto out;
4873 }
4874
4875 if (iocb->ki_flags & IOCB_NOWAIT) {
4876 if (!inode_trylock(inode)) {
4877 ret = -EAGAIN;
4878 goto out;
4879 }
4880 } else {
4881 inode_lock(inode);
4882 }
4883
4884 if (f2fs_is_pinned_file(inode) &&
4885 !f2fs_overwrite_io(inode, pos, count)) {
4886 ret = -EIO;
4887 goto out_unlock;
4888 }
4889
4890 ret = f2fs_write_checks(iocb, from);
4891 if (ret <= 0)
4892 goto out_unlock;
4893
4894 /* Determine whether we will do a direct write or a buffered write. */
4895 dio = f2fs_should_use_dio(inode, iocb, from);
4896
4897 /* Possibly preallocate the blocks for the write. */
4898 target_size = iocb->ki_pos + iov_iter_count(from);
4899 preallocated = f2fs_preallocate_blocks(iocb, from, dio);
4900 if (preallocated < 0) {
4901 ret = preallocated;
4902 } else {
4903 if (trace_f2fs_datawrite_start_enabled())
4904 f2fs_trace_rw_file_path(iocb->ki_filp, iocb->ki_pos,
4905 orig_count, WRITE);
4906
4907 /* Do the actual write. */
4908 ret = dio ?
4909 f2fs_dio_write_iter(iocb, from, &may_need_sync) :
4910 f2fs_buffered_write_iter(iocb, from);
4911
4912 if (trace_f2fs_datawrite_end_enabled())
4913 trace_f2fs_datawrite_end(inode, orig_pos, ret);
4914 }
4915
4916 /* Don't leave any preallocated blocks around past i_size. */
4917 if (preallocated && i_size_read(inode) < target_size) {
4918 f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
4919 filemap_invalidate_lock(inode->i_mapping);
4920 if (!f2fs_truncate(inode))
4921 file_dont_truncate(inode);
4922 filemap_invalidate_unlock(inode->i_mapping);
4923 f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
4924 } else {
4925 file_dont_truncate(inode);
4926 }
4927
4928 clear_inode_flag(inode, FI_PREALLOCATED_ALL);
4929 out_unlock:
4930 inode_unlock(inode);
4931 out:
4932 trace_f2fs_file_write_iter(inode, orig_pos, orig_count, ret);
4933
4934 if (ret > 0 && may_need_sync)
4935 ret = generic_write_sync(iocb, ret);
4936
4937 /* If buffered IO was forced, flush and drop the data from
4938 * the page cache to preserve O_DIRECT semantics
4939 */
4940 if (ret > 0 && !dio && (iocb->ki_flags & IOCB_DIRECT))
4941 f2fs_flush_buffered_write(iocb->ki_filp->f_mapping,
4942 orig_pos,
4943 orig_pos + ret - 1);
4944
4945 return ret;
4946 }
4947
f2fs_file_fadvise(struct file * filp,loff_t offset,loff_t len,int advice)4948 static int f2fs_file_fadvise(struct file *filp, loff_t offset, loff_t len,
4949 int advice)
4950 {
4951 struct address_space *mapping;
4952 struct backing_dev_info *bdi;
4953 struct inode *inode = file_inode(filp);
4954 int err;
4955
4956 if (advice == POSIX_FADV_SEQUENTIAL) {
4957 if (S_ISFIFO(inode->i_mode))
4958 return -ESPIPE;
4959
4960 mapping = filp->f_mapping;
4961 if (!mapping || len < 0)
4962 return -EINVAL;
4963
4964 bdi = inode_to_bdi(mapping->host);
4965 filp->f_ra.ra_pages = bdi->ra_pages *
4966 F2FS_I_SB(inode)->seq_file_ra_mul;
4967 spin_lock(&filp->f_lock);
4968 filp->f_mode &= ~FMODE_RANDOM;
4969 spin_unlock(&filp->f_lock);
4970 return 0;
4971 } else if (advice == POSIX_FADV_WILLNEED && offset == 0) {
4972 /* Load extent cache at the first readahead. */
4973 f2fs_precache_extents(inode);
4974 }
4975
4976 err = generic_fadvise(filp, offset, len, advice);
4977 if (!err && advice == POSIX_FADV_DONTNEED &&
4978 test_opt(F2FS_I_SB(inode), COMPRESS_CACHE) &&
4979 f2fs_compressed_file(inode))
4980 f2fs_invalidate_compress_pages(F2FS_I_SB(inode), inode->i_ino);
4981
4982 return err;
4983 }
4984
4985 #ifdef CONFIG_COMPAT
4986 struct compat_f2fs_gc_range {
4987 u32 sync;
4988 compat_u64 start;
4989 compat_u64 len;
4990 };
4991 #define F2FS_IOC32_GARBAGE_COLLECT_RANGE _IOW(F2FS_IOCTL_MAGIC, 11,\
4992 struct compat_f2fs_gc_range)
4993
f2fs_compat_ioc_gc_range(struct file * file,unsigned long arg)4994 static int f2fs_compat_ioc_gc_range(struct file *file, unsigned long arg)
4995 {
4996 struct compat_f2fs_gc_range __user *urange;
4997 struct f2fs_gc_range range;
4998 int err;
4999
5000 urange = compat_ptr(arg);
5001 err = get_user(range.sync, &urange->sync);
5002 err |= get_user(range.start, &urange->start);
5003 err |= get_user(range.len, &urange->len);
5004 if (err)
5005 return -EFAULT;
5006
5007 return __f2fs_ioc_gc_range(file, &range);
5008 }
5009
5010 struct compat_f2fs_move_range {
5011 u32 dst_fd;
5012 compat_u64 pos_in;
5013 compat_u64 pos_out;
5014 compat_u64 len;
5015 };
5016 #define F2FS_IOC32_MOVE_RANGE _IOWR(F2FS_IOCTL_MAGIC, 9, \
5017 struct compat_f2fs_move_range)
5018
f2fs_compat_ioc_move_range(struct file * file,unsigned long arg)5019 static int f2fs_compat_ioc_move_range(struct file *file, unsigned long arg)
5020 {
5021 struct compat_f2fs_move_range __user *urange;
5022 struct f2fs_move_range range;
5023 int err;
5024
5025 urange = compat_ptr(arg);
5026 err = get_user(range.dst_fd, &urange->dst_fd);
5027 err |= get_user(range.pos_in, &urange->pos_in);
5028 err |= get_user(range.pos_out, &urange->pos_out);
5029 err |= get_user(range.len, &urange->len);
5030 if (err)
5031 return -EFAULT;
5032
5033 return __f2fs_ioc_move_range(file, &range);
5034 }
5035
f2fs_compat_ioctl(struct file * file,unsigned int cmd,unsigned long arg)5036 long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
5037 {
5038 if (unlikely(f2fs_cp_error(F2FS_I_SB(file_inode(file)))))
5039 return -EIO;
5040 if (!f2fs_is_checkpoint_ready(F2FS_I_SB(file_inode(file))))
5041 return -ENOSPC;
5042
5043 switch (cmd) {
5044 case FS_IOC32_GETVERSION:
5045 cmd = FS_IOC_GETVERSION;
5046 break;
5047 case F2FS_IOC32_GARBAGE_COLLECT_RANGE:
5048 return f2fs_compat_ioc_gc_range(file, arg);
5049 case F2FS_IOC32_MOVE_RANGE:
5050 return f2fs_compat_ioc_move_range(file, arg);
5051 case F2FS_IOC_START_ATOMIC_WRITE:
5052 case F2FS_IOC_START_ATOMIC_REPLACE:
5053 case F2FS_IOC_COMMIT_ATOMIC_WRITE:
5054 case F2FS_IOC_START_VOLATILE_WRITE:
5055 case F2FS_IOC_RELEASE_VOLATILE_WRITE:
5056 case F2FS_IOC_ABORT_ATOMIC_WRITE:
5057 case F2FS_IOC_SHUTDOWN:
5058 case FITRIM:
5059 case FS_IOC_SET_ENCRYPTION_POLICY:
5060 case FS_IOC_GET_ENCRYPTION_PWSALT:
5061 case FS_IOC_GET_ENCRYPTION_POLICY:
5062 case FS_IOC_GET_ENCRYPTION_POLICY_EX:
5063 case FS_IOC_ADD_ENCRYPTION_KEY:
5064 case FS_IOC_REMOVE_ENCRYPTION_KEY:
5065 case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
5066 case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
5067 case FS_IOC_GET_ENCRYPTION_NONCE:
5068 case F2FS_IOC_GARBAGE_COLLECT:
5069 case F2FS_IOC_WRITE_CHECKPOINT:
5070 case F2FS_IOC_DEFRAGMENT:
5071 case F2FS_IOC_FLUSH_DEVICE:
5072 case F2FS_IOC_GET_FEATURES:
5073 case F2FS_IOC_GET_PIN_FILE:
5074 case F2FS_IOC_SET_PIN_FILE:
5075 case F2FS_IOC_PRECACHE_EXTENTS:
5076 case F2FS_IOC_RESIZE_FS:
5077 case FS_IOC_ENABLE_VERITY:
5078 case FS_IOC_MEASURE_VERITY:
5079 case FS_IOC_READ_VERITY_METADATA:
5080 case FS_IOC_GETFSLABEL:
5081 case FS_IOC_SETFSLABEL:
5082 case F2FS_IOC_GET_COMPRESS_BLOCKS:
5083 case F2FS_IOC_RELEASE_COMPRESS_BLOCKS:
5084 case F2FS_IOC_RESERVE_COMPRESS_BLOCKS:
5085 case F2FS_IOC_SEC_TRIM_FILE:
5086 case F2FS_IOC_GET_COMPRESS_OPTION:
5087 case F2FS_IOC_SET_COMPRESS_OPTION:
5088 case F2FS_IOC_DECOMPRESS_FILE:
5089 case F2FS_IOC_COMPRESS_FILE:
5090 break;
5091 default:
5092 return -ENOIOCTLCMD;
5093 }
5094 return __f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
5095 }
5096 #endif
5097
5098 const struct file_operations f2fs_file_operations = {
5099 .llseek = f2fs_llseek,
5100 .read_iter = f2fs_file_read_iter,
5101 .write_iter = f2fs_file_write_iter,
5102 .iopoll = iocb_bio_iopoll,
5103 .open = f2fs_file_open,
5104 .release = f2fs_release_file,
5105 .mmap = f2fs_file_mmap,
5106 .flush = f2fs_file_flush,
5107 .fsync = f2fs_sync_file,
5108 .fallocate = f2fs_fallocate,
5109 .unlocked_ioctl = f2fs_ioctl,
5110 #ifdef CONFIG_COMPAT
5111 .compat_ioctl = f2fs_compat_ioctl,
5112 #endif
5113 .splice_read = f2fs_file_splice_read,
5114 .splice_write = iter_file_splice_write,
5115 .fadvise = f2fs_file_fadvise,
5116 .fop_flags = FOP_BUFFER_RASYNC,
5117 };
5118