1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * fs/f2fs/inline.c
4 * Copyright (c) 2013, Intel Corporation
5 * Authors: Huajun Li <huajun.li@intel.com>
6 * Haicheng Li <haicheng.li@intel.com>
7 */
8
9 #include <linux/fs.h>
10 #include <linux/f2fs_fs.h>
11 #include <linux/fiemap.h>
12
13 #include "f2fs.h"
14 #include "node.h"
15 #include <trace/events/f2fs.h>
16
f2fs_may_inline_data(struct inode * inode)17 bool f2fs_may_inline_data(struct inode *inode)
18 {
19 if (f2fs_is_atomic_file(inode))
20 return false;
21
22 if (!S_ISREG(inode->i_mode) && !S_ISLNK(inode->i_mode))
23 return false;
24
25 if (i_size_read(inode) > MAX_INLINE_DATA(inode))
26 return false;
27
28 if (f2fs_post_read_required(inode))
29 return false;
30
31 return true;
32 }
33
f2fs_may_inline_dentry(struct inode * inode)34 bool f2fs_may_inline_dentry(struct inode *inode)
35 {
36 if (!test_opt(F2FS_I_SB(inode), INLINE_DENTRY))
37 return false;
38
39 if (!S_ISDIR(inode->i_mode))
40 return false;
41
42 return true;
43 }
44
f2fs_do_read_inline_data(struct page * page,struct page * ipage)45 void f2fs_do_read_inline_data(struct page *page, struct page *ipage)
46 {
47 struct inode *inode = page->mapping->host;
48 void *src_addr, *dst_addr;
49
50 if (PageUptodate(page))
51 return;
52
53 f2fs_bug_on(F2FS_P_SB(page), page->index);
54
55 zero_user_segment(page, MAX_INLINE_DATA(inode), PAGE_SIZE);
56
57 /* Copy the whole inline data block */
58 src_addr = inline_data_addr(inode, ipage);
59 dst_addr = kmap_atomic(page);
60 memcpy(dst_addr, src_addr, MAX_INLINE_DATA(inode));
61 flush_dcache_page(page);
62 kunmap_atomic(dst_addr);
63 if (!PageUptodate(page))
64 SetPageUptodate(page);
65 }
66
f2fs_truncate_inline_inode(struct inode * inode,struct page * ipage,u64 from)67 void f2fs_truncate_inline_inode(struct inode *inode,
68 struct page *ipage, u64 from)
69 {
70 void *addr;
71
72 if (from >= MAX_INLINE_DATA(inode))
73 return;
74
75 addr = inline_data_addr(inode, ipage);
76
77 f2fs_wait_on_page_writeback(ipage, NODE, true, true);
78 memset(addr + from, 0, MAX_INLINE_DATA(inode) - from);
79 set_page_dirty(ipage);
80
81 if (from == 0)
82 clear_inode_flag(inode, FI_DATA_EXIST);
83 }
84
f2fs_read_inline_data(struct inode * inode,struct page * page)85 int f2fs_read_inline_data(struct inode *inode, struct page *page)
86 {
87 struct page *ipage;
88
89 ipage = f2fs_get_node_page(F2FS_I_SB(inode), inode->i_ino);
90 if (IS_ERR(ipage)) {
91 unlock_page(page);
92 return PTR_ERR(ipage);
93 }
94
95 if (!f2fs_has_inline_data(inode)) {
96 f2fs_put_page(ipage, 1);
97 return -EAGAIN;
98 }
99
100 if (page->index)
101 zero_user_segment(page, 0, PAGE_SIZE);
102 else
103 f2fs_do_read_inline_data(page, ipage);
104
105 if (!PageUptodate(page))
106 SetPageUptodate(page);
107 f2fs_put_page(ipage, 1);
108 unlock_page(page);
109 return 0;
110 }
111
f2fs_convert_inline_page(struct dnode_of_data * dn,struct page * page)112 int f2fs_convert_inline_page(struct dnode_of_data *dn, struct page *page)
113 {
114 struct f2fs_io_info fio = {
115 .sbi = F2FS_I_SB(dn->inode),
116 .ino = dn->inode->i_ino,
117 .type = DATA,
118 .op = REQ_OP_WRITE,
119 .op_flags = REQ_SYNC | REQ_PRIO,
120 .page = page,
121 .encrypted_page = NULL,
122 .io_type = FS_DATA_IO,
123 };
124 struct node_info ni;
125 int dirty, err;
126
127 if (!f2fs_exist_data(dn->inode))
128 goto clear_out;
129
130 err = f2fs_reserve_block(dn, 0);
131 if (err)
132 return err;
133
134 err = f2fs_get_node_info(fio.sbi, dn->nid, &ni);
135 if (err) {
136 f2fs_truncate_data_blocks_range(dn, 1);
137 f2fs_put_dnode(dn);
138 return err;
139 }
140
141 fio.version = ni.version;
142
143 if (unlikely(dn->data_blkaddr != NEW_ADDR)) {
144 f2fs_put_dnode(dn);
145 set_sbi_flag(fio.sbi, SBI_NEED_FSCK);
146 f2fs_warn(fio.sbi, "%s: corrupted inline inode ino=%lx, i_addr[0]:0x%x, run fsck to fix.",
147 __func__, dn->inode->i_ino, dn->data_blkaddr);
148 return -EFSCORRUPTED;
149 }
150
151 f2fs_bug_on(F2FS_P_SB(page), PageWriteback(page));
152
153 f2fs_do_read_inline_data(page, dn->inode_page);
154 set_page_dirty(page);
155
156 /* clear dirty state */
157 dirty = clear_page_dirty_for_io(page);
158
159 /* write data page to try to make data consistent */
160 set_page_writeback(page);
161 ClearPageError(page);
162 fio.old_blkaddr = dn->data_blkaddr;
163 set_inode_flag(dn->inode, FI_HOT_DATA);
164 f2fs_outplace_write_data(dn, &fio);
165 f2fs_wait_on_page_writeback(page, DATA, true, true);
166 if (dirty) {
167 inode_dec_dirty_pages(dn->inode);
168 f2fs_remove_dirty_inode(dn->inode);
169 }
170
171 /* this converted inline_data should be recovered. */
172 set_inode_flag(dn->inode, FI_APPEND_WRITE);
173
174 /* clear inline data and flag after data writeback */
175 f2fs_truncate_inline_inode(dn->inode, dn->inode_page, 0);
176 clear_inline_node(dn->inode_page);
177 clear_out:
178 stat_dec_inline_inode(dn->inode);
179 clear_inode_flag(dn->inode, FI_INLINE_DATA);
180 f2fs_put_dnode(dn);
181 return 0;
182 }
183
f2fs_convert_inline_inode(struct inode * inode)184 int f2fs_convert_inline_inode(struct inode *inode)
185 {
186 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
187 struct dnode_of_data dn;
188 struct page *ipage, *page;
189 int err = 0;
190
191 if (!f2fs_has_inline_data(inode) ||
192 f2fs_hw_is_readonly(sbi) || f2fs_readonly(sbi->sb))
193 return 0;
194
195 err = dquot_initialize(inode);
196 if (err)
197 return err;
198
199 page = f2fs_grab_cache_page(inode->i_mapping, 0, false);
200 if (!page)
201 return -ENOMEM;
202
203 f2fs_lock_op(sbi);
204
205 ipage = f2fs_get_node_page(sbi, inode->i_ino);
206 if (IS_ERR(ipage)) {
207 err = PTR_ERR(ipage);
208 goto out;
209 }
210
211 set_new_dnode(&dn, inode, ipage, ipage, 0);
212
213 if (f2fs_has_inline_data(inode))
214 err = f2fs_convert_inline_page(&dn, page);
215
216 f2fs_put_dnode(&dn);
217 out:
218 f2fs_unlock_op(sbi);
219
220 f2fs_put_page(page, 1);
221
222 if (!err)
223 f2fs_balance_fs(sbi, dn.node_changed);
224
225 return err;
226 }
227
f2fs_write_inline_data(struct inode * inode,struct page * page)228 int f2fs_write_inline_data(struct inode *inode, struct page *page)
229 {
230 void *src_addr, *dst_addr;
231 struct dnode_of_data dn;
232 int err;
233
234 set_new_dnode(&dn, inode, NULL, NULL, 0);
235 err = f2fs_get_dnode_of_data(&dn, 0, LOOKUP_NODE);
236 if (err)
237 return err;
238
239 if (!f2fs_has_inline_data(inode)) {
240 f2fs_put_dnode(&dn);
241 return -EAGAIN;
242 }
243
244 f2fs_bug_on(F2FS_I_SB(inode), page->index);
245
246 f2fs_wait_on_page_writeback(dn.inode_page, NODE, true, true);
247 src_addr = kmap_atomic(page);
248 dst_addr = inline_data_addr(inode, dn.inode_page);
249 memcpy(dst_addr, src_addr, MAX_INLINE_DATA(inode));
250 kunmap_atomic(src_addr);
251 set_page_dirty(dn.inode_page);
252
253 f2fs_clear_page_cache_dirty_tag(page);
254
255 set_inode_flag(inode, FI_APPEND_WRITE);
256 set_inode_flag(inode, FI_DATA_EXIST);
257
258 clear_inline_node(dn.inode_page);
259 f2fs_put_dnode(&dn);
260 return 0;
261 }
262
f2fs_recover_inline_data(struct inode * inode,struct page * npage)263 int f2fs_recover_inline_data(struct inode *inode, struct page *npage)
264 {
265 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
266 struct f2fs_inode *ri = NULL;
267 void *src_addr, *dst_addr;
268 struct page *ipage;
269
270 /*
271 * The inline_data recovery policy is as follows.
272 * [prev.] [next] of inline_data flag
273 * o o -> recover inline_data
274 * o x -> remove inline_data, and then recover data blocks
275 * x o -> remove data blocks, and then recover inline_data
276 * x x -> recover data blocks
277 */
278 if (IS_INODE(npage))
279 ri = F2FS_INODE(npage);
280
281 if (f2fs_has_inline_data(inode) &&
282 ri && (ri->i_inline & F2FS_INLINE_DATA)) {
283 process_inline:
284 ipage = f2fs_get_node_page(sbi, inode->i_ino);
285 if (IS_ERR(ipage))
286 return PTR_ERR(ipage);
287
288 f2fs_wait_on_page_writeback(ipage, NODE, true, true);
289
290 src_addr = inline_data_addr(inode, npage);
291 dst_addr = inline_data_addr(inode, ipage);
292 memcpy(dst_addr, src_addr, MAX_INLINE_DATA(inode));
293
294 set_inode_flag(inode, FI_INLINE_DATA);
295 set_inode_flag(inode, FI_DATA_EXIST);
296
297 set_page_dirty(ipage);
298 f2fs_put_page(ipage, 1);
299 return 1;
300 }
301
302 if (f2fs_has_inline_data(inode)) {
303 ipage = f2fs_get_node_page(sbi, inode->i_ino);
304 if (IS_ERR(ipage))
305 return PTR_ERR(ipage);
306 f2fs_truncate_inline_inode(inode, ipage, 0);
307 stat_dec_inline_inode(inode);
308 clear_inode_flag(inode, FI_INLINE_DATA);
309 f2fs_put_page(ipage, 1);
310 } else if (ri && (ri->i_inline & F2FS_INLINE_DATA)) {
311 int ret;
312
313 ret = f2fs_truncate_blocks(inode, 0, false);
314 if (ret)
315 return ret;
316 stat_inc_inline_inode(inode);
317 goto process_inline;
318 }
319 return 0;
320 }
321
f2fs_find_in_inline_dir(struct inode * dir,const struct f2fs_filename * fname,struct page ** res_page)322 struct f2fs_dir_entry *f2fs_find_in_inline_dir(struct inode *dir,
323 const struct f2fs_filename *fname,
324 struct page **res_page)
325 {
326 struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
327 struct f2fs_dir_entry *de;
328 struct f2fs_dentry_ptr d;
329 struct page *ipage;
330 void *inline_dentry;
331
332 ipage = f2fs_get_node_page(sbi, dir->i_ino);
333 if (IS_ERR(ipage)) {
334 *res_page = ipage;
335 return NULL;
336 }
337
338 inline_dentry = inline_data_addr(dir, ipage);
339
340 make_dentry_ptr_inline(dir, &d, inline_dentry);
341 de = f2fs_find_target_dentry(&d, fname, NULL);
342 unlock_page(ipage);
343 if (IS_ERR(de)) {
344 *res_page = ERR_CAST(de);
345 de = NULL;
346 }
347 if (de)
348 *res_page = ipage;
349 else
350 f2fs_put_page(ipage, 0);
351
352 return de;
353 }
354
f2fs_make_empty_inline_dir(struct inode * inode,struct inode * parent,struct page * ipage)355 int f2fs_make_empty_inline_dir(struct inode *inode, struct inode *parent,
356 struct page *ipage)
357 {
358 struct f2fs_dentry_ptr d;
359 void *inline_dentry;
360
361 inline_dentry = inline_data_addr(inode, ipage);
362
363 make_dentry_ptr_inline(inode, &d, inline_dentry);
364 f2fs_do_make_empty_dir(inode, parent, &d);
365
366 set_page_dirty(ipage);
367
368 /* update i_size to MAX_INLINE_DATA */
369 if (i_size_read(inode) < MAX_INLINE_DATA(inode))
370 f2fs_i_size_write(inode, MAX_INLINE_DATA(inode));
371 return 0;
372 }
373
374 /*
375 * NOTE: ipage is grabbed by caller, but if any error occurs, we should
376 * release ipage in this function.
377 */
f2fs_move_inline_dirents(struct inode * dir,struct page * ipage,void * inline_dentry)378 static int f2fs_move_inline_dirents(struct inode *dir, struct page *ipage,
379 void *inline_dentry)
380 {
381 struct page *page;
382 struct dnode_of_data dn;
383 struct f2fs_dentry_block *dentry_blk;
384 struct f2fs_dentry_ptr src, dst;
385 int err;
386
387 page = f2fs_grab_cache_page(dir->i_mapping, 0, true);
388 if (!page) {
389 f2fs_put_page(ipage, 1);
390 return -ENOMEM;
391 }
392
393 set_new_dnode(&dn, dir, ipage, NULL, 0);
394 err = f2fs_reserve_block(&dn, 0);
395 if (err)
396 goto out;
397
398 if (unlikely(dn.data_blkaddr != NEW_ADDR)) {
399 f2fs_put_dnode(&dn);
400 set_sbi_flag(F2FS_P_SB(page), SBI_NEED_FSCK);
401 f2fs_warn(F2FS_P_SB(page), "%s: corrupted inline inode ino=%lx, i_addr[0]:0x%x, run fsck to fix.",
402 __func__, dir->i_ino, dn.data_blkaddr);
403 err = -EFSCORRUPTED;
404 goto out;
405 }
406
407 f2fs_wait_on_page_writeback(page, DATA, true, true);
408
409 dentry_blk = page_address(page);
410
411 make_dentry_ptr_inline(dir, &src, inline_dentry);
412 make_dentry_ptr_block(dir, &dst, dentry_blk);
413
414 /* copy data from inline dentry block to new dentry block */
415 memcpy(dst.bitmap, src.bitmap, src.nr_bitmap);
416 memset(dst.bitmap + src.nr_bitmap, 0, dst.nr_bitmap - src.nr_bitmap);
417 /*
418 * we do not need to zero out remainder part of dentry and filename
419 * field, since we have used bitmap for marking the usage status of
420 * them, besides, we can also ignore copying/zeroing reserved space
421 * of dentry block, because them haven't been used so far.
422 */
423 memcpy(dst.dentry, src.dentry, SIZE_OF_DIR_ENTRY * src.max);
424 memcpy(dst.filename, src.filename, src.max * F2FS_SLOT_LEN);
425
426 if (!PageUptodate(page))
427 SetPageUptodate(page);
428 set_page_dirty(page);
429
430 /* clear inline dir and flag after data writeback */
431 f2fs_truncate_inline_inode(dir, ipage, 0);
432
433 stat_dec_inline_dir(dir);
434 clear_inode_flag(dir, FI_INLINE_DENTRY);
435
436 /*
437 * should retrieve reserved space which was used to keep
438 * inline_dentry's structure for backward compatibility.
439 */
440 if (!f2fs_sb_has_flexible_inline_xattr(F2FS_I_SB(dir)) &&
441 !f2fs_has_inline_xattr(dir))
442 F2FS_I(dir)->i_inline_xattr_size = 0;
443
444 f2fs_i_depth_write(dir, 1);
445 if (i_size_read(dir) < PAGE_SIZE)
446 f2fs_i_size_write(dir, PAGE_SIZE);
447 out:
448 f2fs_put_page(page, 1);
449 return err;
450 }
451
f2fs_add_inline_entries(struct inode * dir,void * inline_dentry)452 static int f2fs_add_inline_entries(struct inode *dir, void *inline_dentry)
453 {
454 struct f2fs_dentry_ptr d;
455 unsigned long bit_pos = 0;
456 int err = 0;
457
458 make_dentry_ptr_inline(dir, &d, inline_dentry);
459
460 while (bit_pos < d.max) {
461 struct f2fs_dir_entry *de;
462 struct f2fs_filename fname;
463 nid_t ino;
464 umode_t fake_mode;
465
466 if (!test_bit_le(bit_pos, d.bitmap)) {
467 bit_pos++;
468 continue;
469 }
470
471 de = &d.dentry[bit_pos];
472
473 if (unlikely(!de->name_len)) {
474 bit_pos++;
475 continue;
476 }
477
478 /*
479 * We only need the disk_name and hash to move the dentry.
480 * We don't need the original or casefolded filenames.
481 */
482 memset(&fname, 0, sizeof(fname));
483 fname.disk_name.name = d.filename[bit_pos];
484 fname.disk_name.len = le16_to_cpu(de->name_len);
485 fname.hash = de->hash_code;
486
487 ino = le32_to_cpu(de->ino);
488 fake_mode = f2fs_get_de_type(de) << S_SHIFT;
489
490 err = f2fs_add_regular_entry(dir, &fname, NULL, ino, fake_mode);
491 if (err)
492 goto punch_dentry_pages;
493
494 bit_pos += GET_DENTRY_SLOTS(le16_to_cpu(de->name_len));
495 }
496 return 0;
497 punch_dentry_pages:
498 truncate_inode_pages(&dir->i_data, 0);
499 f2fs_truncate_blocks(dir, 0, false);
500 f2fs_remove_dirty_inode(dir);
501 return err;
502 }
503
f2fs_move_rehashed_dirents(struct inode * dir,struct page * ipage,void * inline_dentry)504 static int f2fs_move_rehashed_dirents(struct inode *dir, struct page *ipage,
505 void *inline_dentry)
506 {
507 void *backup_dentry;
508 int err;
509
510 backup_dentry = f2fs_kmalloc(F2FS_I_SB(dir),
511 MAX_INLINE_DATA(dir), GFP_F2FS_ZERO);
512 if (!backup_dentry) {
513 f2fs_put_page(ipage, 1);
514 return -ENOMEM;
515 }
516
517 memcpy(backup_dentry, inline_dentry, MAX_INLINE_DATA(dir));
518 f2fs_truncate_inline_inode(dir, ipage, 0);
519
520 unlock_page(ipage);
521
522 err = f2fs_add_inline_entries(dir, backup_dentry);
523 if (err)
524 goto recover;
525
526 lock_page(ipage);
527
528 stat_dec_inline_dir(dir);
529 clear_inode_flag(dir, FI_INLINE_DENTRY);
530
531 /*
532 * should retrieve reserved space which was used to keep
533 * inline_dentry's structure for backward compatibility.
534 */
535 if (!f2fs_sb_has_flexible_inline_xattr(F2FS_I_SB(dir)) &&
536 !f2fs_has_inline_xattr(dir))
537 F2FS_I(dir)->i_inline_xattr_size = 0;
538
539 kfree(backup_dentry);
540 return 0;
541 recover:
542 lock_page(ipage);
543 f2fs_wait_on_page_writeback(ipage, NODE, true, true);
544 memcpy(inline_dentry, backup_dentry, MAX_INLINE_DATA(dir));
545 f2fs_i_depth_write(dir, 0);
546 f2fs_i_size_write(dir, MAX_INLINE_DATA(dir));
547 set_page_dirty(ipage);
548 f2fs_put_page(ipage, 1);
549
550 kfree(backup_dentry);
551 return err;
552 }
553
do_convert_inline_dir(struct inode * dir,struct page * ipage,void * inline_dentry)554 static int do_convert_inline_dir(struct inode *dir, struct page *ipage,
555 void *inline_dentry)
556 {
557 if (!F2FS_I(dir)->i_dir_level)
558 return f2fs_move_inline_dirents(dir, ipage, inline_dentry);
559 else
560 return f2fs_move_rehashed_dirents(dir, ipage, inline_dentry);
561 }
562
f2fs_try_convert_inline_dir(struct inode * dir,struct dentry * dentry)563 int f2fs_try_convert_inline_dir(struct inode *dir, struct dentry *dentry)
564 {
565 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
566 struct page *ipage;
567 struct f2fs_filename fname;
568 void *inline_dentry = NULL;
569 int err = 0;
570
571 if (!f2fs_has_inline_dentry(dir))
572 return 0;
573
574 f2fs_lock_op(sbi);
575
576 err = f2fs_setup_filename(dir, &dentry->d_name, 0, &fname);
577 if (err)
578 goto out;
579
580 ipage = f2fs_get_node_page(sbi, dir->i_ino);
581 if (IS_ERR(ipage)) {
582 err = PTR_ERR(ipage);
583 goto out_fname;
584 }
585
586 if (f2fs_has_enough_room(dir, ipage, &fname)) {
587 f2fs_put_page(ipage, 1);
588 goto out_fname;
589 }
590
591 inline_dentry = inline_data_addr(dir, ipage);
592
593 err = do_convert_inline_dir(dir, ipage, inline_dentry);
594 if (!err)
595 f2fs_put_page(ipage, 1);
596 out_fname:
597 f2fs_free_filename(&fname);
598 out:
599 f2fs_unlock_op(sbi);
600 return err;
601 }
602
f2fs_add_inline_entry(struct inode * dir,const struct f2fs_filename * fname,struct inode * inode,nid_t ino,umode_t mode)603 int f2fs_add_inline_entry(struct inode *dir, const struct f2fs_filename *fname,
604 struct inode *inode, nid_t ino, umode_t mode)
605 {
606 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
607 struct page *ipage;
608 unsigned int bit_pos;
609 void *inline_dentry = NULL;
610 struct f2fs_dentry_ptr d;
611 int slots = GET_DENTRY_SLOTS(fname->disk_name.len);
612 struct page *page = NULL;
613 int err = 0;
614
615 ipage = f2fs_get_node_page(sbi, dir->i_ino);
616 if (IS_ERR(ipage))
617 return PTR_ERR(ipage);
618
619 inline_dentry = inline_data_addr(dir, ipage);
620 make_dentry_ptr_inline(dir, &d, inline_dentry);
621
622 bit_pos = f2fs_room_for_filename(d.bitmap, slots, d.max);
623 if (bit_pos >= d.max) {
624 err = do_convert_inline_dir(dir, ipage, inline_dentry);
625 if (err)
626 return err;
627 err = -EAGAIN;
628 goto out;
629 }
630
631 if (inode) {
632 down_write(&F2FS_I(inode)->i_sem);
633 page = f2fs_init_inode_metadata(inode, dir, fname, ipage);
634 if (IS_ERR(page)) {
635 err = PTR_ERR(page);
636 goto fail;
637 }
638 }
639
640 f2fs_wait_on_page_writeback(ipage, NODE, true, true);
641
642 f2fs_update_dentry(ino, mode, &d, &fname->disk_name, fname->hash,
643 bit_pos);
644
645 set_page_dirty(ipage);
646
647 /* we don't need to mark_inode_dirty now */
648 if (inode) {
649 f2fs_i_pino_write(inode, dir->i_ino);
650
651 /* synchronize inode page's data from inode cache */
652 if (is_inode_flag_set(inode, FI_NEW_INODE))
653 f2fs_update_inode(inode, page);
654
655 f2fs_put_page(page, 1);
656 }
657
658 f2fs_update_parent_metadata(dir, inode, 0);
659 fail:
660 if (inode)
661 up_write(&F2FS_I(inode)->i_sem);
662 out:
663 f2fs_put_page(ipage, 1);
664 return err;
665 }
666
f2fs_delete_inline_entry(struct f2fs_dir_entry * dentry,struct page * page,struct inode * dir,struct inode * inode)667 void f2fs_delete_inline_entry(struct f2fs_dir_entry *dentry, struct page *page,
668 struct inode *dir, struct inode *inode)
669 {
670 struct f2fs_dentry_ptr d;
671 void *inline_dentry;
672 int slots = GET_DENTRY_SLOTS(le16_to_cpu(dentry->name_len));
673 unsigned int bit_pos;
674 int i;
675
676 lock_page(page);
677 f2fs_wait_on_page_writeback(page, NODE, true, true);
678
679 inline_dentry = inline_data_addr(dir, page);
680 make_dentry_ptr_inline(dir, &d, inline_dentry);
681
682 bit_pos = dentry - d.dentry;
683 for (i = 0; i < slots; i++)
684 __clear_bit_le(bit_pos + i, d.bitmap);
685
686 set_page_dirty(page);
687 f2fs_put_page(page, 1);
688
689 dir->i_ctime = dir->i_mtime = current_time(dir);
690 f2fs_mark_inode_dirty_sync(dir, false);
691
692 if (inode)
693 f2fs_drop_nlink(dir, inode);
694 }
695
f2fs_empty_inline_dir(struct inode * dir)696 bool f2fs_empty_inline_dir(struct inode *dir)
697 {
698 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
699 struct page *ipage;
700 unsigned int bit_pos = 2;
701 void *inline_dentry;
702 struct f2fs_dentry_ptr d;
703
704 ipage = f2fs_get_node_page(sbi, dir->i_ino);
705 if (IS_ERR(ipage))
706 return false;
707
708 inline_dentry = inline_data_addr(dir, ipage);
709 make_dentry_ptr_inline(dir, &d, inline_dentry);
710
711 bit_pos = find_next_bit_le(d.bitmap, d.max, bit_pos);
712
713 f2fs_put_page(ipage, 1);
714
715 if (bit_pos < d.max)
716 return false;
717
718 return true;
719 }
720
f2fs_read_inline_dir(struct file * file,struct dir_context * ctx,struct fscrypt_str * fstr)721 int f2fs_read_inline_dir(struct file *file, struct dir_context *ctx,
722 struct fscrypt_str *fstr)
723 {
724 struct inode *inode = file_inode(file);
725 struct page *ipage = NULL;
726 struct f2fs_dentry_ptr d;
727 void *inline_dentry = NULL;
728 int err;
729
730 make_dentry_ptr_inline(inode, &d, inline_dentry);
731
732 if (ctx->pos == d.max)
733 return 0;
734
735 ipage = f2fs_get_node_page(F2FS_I_SB(inode), inode->i_ino);
736 if (IS_ERR(ipage))
737 return PTR_ERR(ipage);
738
739 /*
740 * f2fs_readdir was protected by inode.i_rwsem, it is safe to access
741 * ipage without page's lock held.
742 */
743 unlock_page(ipage);
744
745 inline_dentry = inline_data_addr(inode, ipage);
746
747 make_dentry_ptr_inline(inode, &d, inline_dentry);
748
749 err = f2fs_fill_dentries(ctx, &d, 0, fstr);
750 if (!err)
751 ctx->pos = d.max;
752
753 f2fs_put_page(ipage, 0);
754 return err < 0 ? err : 0;
755 }
756
f2fs_inline_data_fiemap(struct inode * inode,struct fiemap_extent_info * fieinfo,__u64 start,__u64 len)757 int f2fs_inline_data_fiemap(struct inode *inode,
758 struct fiemap_extent_info *fieinfo, __u64 start, __u64 len)
759 {
760 __u64 byteaddr, ilen;
761 __u32 flags = FIEMAP_EXTENT_DATA_INLINE | FIEMAP_EXTENT_NOT_ALIGNED |
762 FIEMAP_EXTENT_LAST;
763 struct node_info ni;
764 struct page *ipage;
765 int err = 0;
766
767 ipage = f2fs_get_node_page(F2FS_I_SB(inode), inode->i_ino);
768 if (IS_ERR(ipage))
769 return PTR_ERR(ipage);
770
771 if ((S_ISREG(inode->i_mode) || S_ISLNK(inode->i_mode)) &&
772 !f2fs_has_inline_data(inode)) {
773 err = -EAGAIN;
774 goto out;
775 }
776
777 if (S_ISDIR(inode->i_mode) && !f2fs_has_inline_dentry(inode)) {
778 err = -EAGAIN;
779 goto out;
780 }
781
782 ilen = min_t(size_t, MAX_INLINE_DATA(inode), i_size_read(inode));
783 if (start >= ilen)
784 goto out;
785 if (start + len < ilen)
786 ilen = start + len;
787 ilen -= start;
788
789 err = f2fs_get_node_info(F2FS_I_SB(inode), inode->i_ino, &ni);
790 if (err)
791 goto out;
792
793 byteaddr = (__u64)ni.blk_addr << inode->i_sb->s_blocksize_bits;
794 byteaddr += (char *)inline_data_addr(inode, ipage) -
795 (char *)F2FS_INODE(ipage);
796 err = fiemap_fill_next_extent(fieinfo, start, byteaddr, ilen, flags);
797 trace_f2fs_fiemap(inode, start, byteaddr, ilen, flags, err);
798 out:
799 f2fs_put_page(ipage, 1);
800 return err;
801 }
802