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
12 #include "f2fs.h"
13 #include "node.h"
14 #include <trace/events/android_fs.h>
15
f2fs_may_inline_data(struct inode * inode)16 bool f2fs_may_inline_data(struct inode *inode)
17 {
18 if (f2fs_is_atomic_file(inode))
19 return false;
20
21 if (!S_ISREG(inode->i_mode) && !S_ISLNK(inode->i_mode))
22 return false;
23
24 if (i_size_read(inode) > MAX_INLINE_DATA(inode))
25 return false;
26
27 if (f2fs_post_read_required(inode))
28 return false;
29
30 return true;
31 }
32
f2fs_may_inline_dentry(struct inode * inode)33 bool f2fs_may_inline_dentry(struct inode *inode)
34 {
35 if (!test_opt(F2FS_I_SB(inode), INLINE_DENTRY))
36 return false;
37
38 if (!S_ISDIR(inode->i_mode))
39 return false;
40
41 return true;
42 }
43
f2fs_do_read_inline_data(struct page * page,struct page * ipage)44 void f2fs_do_read_inline_data(struct page *page, struct page *ipage)
45 {
46 struct inode *inode = page->mapping->host;
47
48 if (PageUptodate(page))
49 return;
50
51 f2fs_bug_on(F2FS_P_SB(page), page->index);
52
53 zero_user_segment(page, MAX_INLINE_DATA(inode), PAGE_SIZE);
54
55 /* Copy the whole inline data block */
56 memcpy_to_page(page, 0, inline_data_addr(inode, ipage),
57 MAX_INLINE_DATA(inode));
58 if (!PageUptodate(page))
59 SetPageUptodate(page);
60 }
61
f2fs_truncate_inline_inode(struct inode * inode,struct page * ipage,u64 from)62 void f2fs_truncate_inline_inode(struct inode *inode,
63 struct page *ipage, u64 from)
64 {
65 void *addr;
66
67 if (from >= MAX_INLINE_DATA(inode))
68 return;
69
70 addr = inline_data_addr(inode, ipage);
71
72 f2fs_wait_on_page_writeback(ipage, NODE, true, true);
73 memset(addr + from, 0, MAX_INLINE_DATA(inode) - from);
74 set_page_dirty(ipage);
75
76 if (from == 0)
77 clear_inode_flag(inode, FI_DATA_EXIST);
78 }
79
f2fs_read_inline_data(struct inode * inode,struct page * page)80 int f2fs_read_inline_data(struct inode *inode, struct page *page)
81 {
82 struct page *ipage;
83
84 if (trace_android_fs_dataread_start_enabled()) {
85 char *path, pathbuf[MAX_TRACE_PATHBUF_LEN];
86
87 path = android_fstrace_get_pathname(pathbuf,
88 MAX_TRACE_PATHBUF_LEN,
89 inode);
90 trace_android_fs_dataread_start(inode, page_offset(page),
91 PAGE_SIZE, current->pid,
92 path, current->comm);
93 }
94
95 ipage = f2fs_get_node_page(F2FS_I_SB(inode), inode->i_ino);
96 if (IS_ERR(ipage)) {
97 trace_android_fs_dataread_end(inode, page_offset(page),
98 PAGE_SIZE);
99 unlock_page(page);
100 return PTR_ERR(ipage);
101 }
102
103 if (!f2fs_has_inline_data(inode)) {
104 f2fs_put_page(ipage, 1);
105 trace_android_fs_dataread_end(inode, page_offset(page),
106 PAGE_SIZE);
107 return -EAGAIN;
108 }
109
110 if (page->index)
111 zero_user_segment(page, 0, PAGE_SIZE);
112 else
113 f2fs_do_read_inline_data(page, ipage);
114
115 if (!PageUptodate(page))
116 SetPageUptodate(page);
117 f2fs_put_page(ipage, 1);
118 trace_android_fs_dataread_end(inode, page_offset(page),
119 PAGE_SIZE);
120 unlock_page(page);
121 return 0;
122 }
123
f2fs_convert_inline_page(struct dnode_of_data * dn,struct page * page)124 int f2fs_convert_inline_page(struct dnode_of_data *dn, struct page *page)
125 {
126 struct f2fs_io_info fio = {
127 .sbi = F2FS_I_SB(dn->inode),
128 .ino = dn->inode->i_ino,
129 .type = DATA,
130 .op = REQ_OP_WRITE,
131 .op_flags = REQ_SYNC | REQ_PRIO,
132 .page = page,
133 .encrypted_page = NULL,
134 .io_type = FS_DATA_IO,
135 };
136 struct node_info ni;
137 int dirty, err;
138
139 if (!f2fs_exist_data(dn->inode))
140 goto clear_out;
141
142 err = f2fs_reserve_block(dn, 0);
143 if (err)
144 return err;
145
146 err = f2fs_get_node_info(fio.sbi, dn->nid, &ni);
147 if (err) {
148 f2fs_truncate_data_blocks_range(dn, 1);
149 f2fs_put_dnode(dn);
150 return err;
151 }
152
153 fio.version = ni.version;
154
155 if (unlikely(dn->data_blkaddr != NEW_ADDR)) {
156 f2fs_put_dnode(dn);
157 set_sbi_flag(fio.sbi, SBI_NEED_FSCK);
158 f2fs_warn(fio.sbi, "%s: corrupted inline inode ino=%lx, i_addr[0]:0x%x, run fsck to fix.",
159 __func__, dn->inode->i_ino, dn->data_blkaddr);
160 return -EFSCORRUPTED;
161 }
162
163 f2fs_bug_on(F2FS_P_SB(page), PageWriteback(page));
164
165 f2fs_do_read_inline_data(page, dn->inode_page);
166 set_page_dirty(page);
167
168 /* clear dirty state */
169 dirty = clear_page_dirty_for_io(page);
170
171 /* write data page to try to make data consistent */
172 set_page_writeback(page);
173 ClearPageError(page);
174 fio.old_blkaddr = dn->data_blkaddr;
175 set_inode_flag(dn->inode, FI_HOT_DATA);
176 f2fs_outplace_write_data(dn, &fio);
177 f2fs_wait_on_page_writeback(page, DATA, true, true);
178 if (dirty) {
179 inode_dec_dirty_pages(dn->inode);
180 f2fs_remove_dirty_inode(dn->inode);
181 }
182
183 /* this converted inline_data should be recovered. */
184 set_inode_flag(dn->inode, FI_APPEND_WRITE);
185
186 /* clear inline data and flag after data writeback */
187 f2fs_truncate_inline_inode(dn->inode, dn->inode_page, 0);
188 clear_inline_node(dn->inode_page);
189 clear_out:
190 stat_dec_inline_inode(dn->inode);
191 clear_inode_flag(dn->inode, FI_INLINE_DATA);
192 f2fs_put_dnode(dn);
193 return 0;
194 }
195
f2fs_convert_inline_inode(struct inode * inode)196 int f2fs_convert_inline_inode(struct inode *inode)
197 {
198 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
199 struct dnode_of_data dn;
200 struct page *ipage, *page;
201 int err = 0;
202
203 if (!f2fs_has_inline_data(inode))
204 return 0;
205
206 err = dquot_initialize(inode);
207 if (err)
208 return err;
209
210 page = f2fs_grab_cache_page(inode->i_mapping, 0, false);
211 if (!page)
212 return -ENOMEM;
213
214 f2fs_lock_op(sbi);
215
216 ipage = f2fs_get_node_page(sbi, inode->i_ino);
217 if (IS_ERR(ipage)) {
218 err = PTR_ERR(ipage);
219 goto out;
220 }
221
222 set_new_dnode(&dn, inode, ipage, ipage, 0);
223
224 if (f2fs_has_inline_data(inode))
225 err = f2fs_convert_inline_page(&dn, page);
226
227 f2fs_put_dnode(&dn);
228 out:
229 f2fs_unlock_op(sbi);
230
231 f2fs_put_page(page, 1);
232
233 if (!err)
234 f2fs_balance_fs(sbi, dn.node_changed);
235
236 return err;
237 }
238
f2fs_write_inline_data(struct inode * inode,struct page * page)239 int f2fs_write_inline_data(struct inode *inode, struct page *page)
240 {
241 struct dnode_of_data dn;
242 int err;
243
244 set_new_dnode(&dn, inode, NULL, NULL, 0);
245 err = f2fs_get_dnode_of_data(&dn, 0, LOOKUP_NODE);
246 if (err)
247 return err;
248
249 if (!f2fs_has_inline_data(inode)) {
250 f2fs_put_dnode(&dn);
251 return -EAGAIN;
252 }
253
254 f2fs_bug_on(F2FS_I_SB(inode), page->index);
255
256 f2fs_wait_on_page_writeback(dn.inode_page, NODE, true, true);
257 memcpy_from_page(inline_data_addr(inode, dn.inode_page),
258 page, 0, MAX_INLINE_DATA(inode));
259 set_page_dirty(dn.inode_page);
260
261 f2fs_clear_page_cache_dirty_tag(page);
262
263 set_inode_flag(inode, FI_APPEND_WRITE);
264 set_inode_flag(inode, FI_DATA_EXIST);
265
266 clear_inline_node(dn.inode_page);
267 f2fs_put_dnode(&dn);
268 return 0;
269 }
270
f2fs_recover_inline_data(struct inode * inode,struct page * npage)271 int f2fs_recover_inline_data(struct inode *inode, struct page *npage)
272 {
273 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
274 struct f2fs_inode *ri = NULL;
275 void *src_addr, *dst_addr;
276 struct page *ipage;
277
278 /*
279 * The inline_data recovery policy is as follows.
280 * [prev.] [next] of inline_data flag
281 * o o -> recover inline_data
282 * o x -> remove inline_data, and then recover data blocks
283 * x o -> remove inline_data, and then recover inline_data
284 * x x -> recover data blocks
285 */
286 if (IS_INODE(npage))
287 ri = F2FS_INODE(npage);
288
289 if (f2fs_has_inline_data(inode) &&
290 ri && (ri->i_inline & F2FS_INLINE_DATA)) {
291 process_inline:
292 ipage = f2fs_get_node_page(sbi, inode->i_ino);
293 if (IS_ERR(ipage))
294 return PTR_ERR(ipage);
295
296 f2fs_wait_on_page_writeback(ipage, NODE, true, true);
297
298 src_addr = inline_data_addr(inode, npage);
299 dst_addr = inline_data_addr(inode, ipage);
300 memcpy(dst_addr, src_addr, MAX_INLINE_DATA(inode));
301
302 set_inode_flag(inode, FI_INLINE_DATA);
303 set_inode_flag(inode, FI_DATA_EXIST);
304
305 set_page_dirty(ipage);
306 f2fs_put_page(ipage, 1);
307 return 1;
308 }
309
310 if (f2fs_has_inline_data(inode)) {
311 ipage = f2fs_get_node_page(sbi, inode->i_ino);
312 if (IS_ERR(ipage))
313 return PTR_ERR(ipage);
314 f2fs_truncate_inline_inode(inode, ipage, 0);
315 clear_inode_flag(inode, FI_INLINE_DATA);
316 f2fs_put_page(ipage, 1);
317 } else if (ri && (ri->i_inline & F2FS_INLINE_DATA)) {
318 int ret;
319
320 ret = f2fs_truncate_blocks(inode, 0, false);
321 if (ret)
322 return ret;
323 goto process_inline;
324 }
325 return 0;
326 }
327
f2fs_find_in_inline_dir(struct inode * dir,const struct f2fs_filename * fname,struct page ** res_page)328 struct f2fs_dir_entry *f2fs_find_in_inline_dir(struct inode *dir,
329 const struct f2fs_filename *fname,
330 struct page **res_page)
331 {
332 struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
333 struct f2fs_dir_entry *de;
334 struct f2fs_dentry_ptr d;
335 struct page *ipage;
336 void *inline_dentry;
337
338 ipage = f2fs_get_node_page(sbi, dir->i_ino);
339 if (IS_ERR(ipage)) {
340 *res_page = ipage;
341 return NULL;
342 }
343
344 inline_dentry = inline_data_addr(dir, ipage);
345
346 make_dentry_ptr_inline(dir, &d, inline_dentry);
347 de = f2fs_find_target_dentry(&d, fname, NULL);
348 unlock_page(ipage);
349 if (de)
350 *res_page = ipage;
351 else
352 f2fs_put_page(ipage, 0);
353
354 return de;
355 }
356
f2fs_make_empty_inline_dir(struct inode * inode,struct inode * parent,struct page * ipage)357 int f2fs_make_empty_inline_dir(struct inode *inode, struct inode *parent,
358 struct page *ipage)
359 {
360 struct f2fs_dentry_ptr d;
361 void *inline_dentry;
362
363 inline_dentry = inline_data_addr(inode, ipage);
364
365 make_dentry_ptr_inline(inode, &d, inline_dentry);
366 f2fs_do_make_empty_dir(inode, parent, &d);
367
368 set_page_dirty(ipage);
369
370 /* update i_size to MAX_INLINE_DATA */
371 if (i_size_read(inode) < MAX_INLINE_DATA(inode))
372 f2fs_i_size_write(inode, MAX_INLINE_DATA(inode));
373 return 0;
374 }
375
376 /*
377 * NOTE: ipage is grabbed by caller, but if any error occurs, we should
378 * release ipage in this function.
379 */
f2fs_move_inline_dirents(struct inode * dir,struct page * ipage,void * inline_dentry)380 static int f2fs_move_inline_dirents(struct inode *dir, struct page *ipage,
381 void *inline_dentry)
382 {
383 struct page *page;
384 struct dnode_of_data dn;
385 struct f2fs_dentry_block *dentry_blk;
386 struct f2fs_dentry_ptr src, dst;
387 int err;
388
389 page = f2fs_grab_cache_page(dir->i_mapping, 0, true);
390 if (!page) {
391 f2fs_put_page(ipage, 1);
392 return -ENOMEM;
393 }
394
395 set_new_dnode(&dn, dir, ipage, NULL, 0);
396 err = f2fs_reserve_block(&dn, 0);
397 if (err)
398 goto out;
399
400 if (unlikely(dn.data_blkaddr != NEW_ADDR)) {
401 f2fs_put_dnode(&dn);
402 set_sbi_flag(F2FS_P_SB(page), SBI_NEED_FSCK);
403 f2fs_warn(F2FS_P_SB(page), "%s: corrupted inline inode ino=%lx, i_addr[0]:0x%x, run fsck to fix.",
404 __func__, dir->i_ino, dn.data_blkaddr);
405 err = -EFSCORRUPTED;
406 goto out;
407 }
408
409 f2fs_wait_on_page_writeback(page, DATA, true, true);
410
411 dentry_blk = page_address(page);
412
413 /*
414 * Start by zeroing the full block, to ensure that all unused space is
415 * zeroed and no uninitialized memory is leaked to disk.
416 */
417 memset(dentry_blk, 0, F2FS_BLKSIZE);
418
419 make_dentry_ptr_inline(dir, &src, inline_dentry);
420 make_dentry_ptr_block(dir, &dst, dentry_blk);
421
422 /* copy data from inline dentry block to new dentry block */
423 memcpy(dst.bitmap, src.bitmap, src.nr_bitmap);
424 memcpy(dst.dentry, src.dentry, SIZE_OF_DIR_ENTRY * src.max);
425 memcpy(dst.filename, src.filename, src.max * F2FS_SLOT_LEN);
426
427 if (!PageUptodate(page))
428 SetPageUptodate(page);
429 set_page_dirty(page);
430
431 /* clear inline dir and flag after data writeback */
432 f2fs_truncate_inline_inode(dir, ipage, 0);
433
434 stat_dec_inline_dir(dir);
435 clear_inode_flag(dir, FI_INLINE_DENTRY);
436
437 /*
438 * should retrieve reserved space which was used to keep
439 * inline_dentry's structure for backward compatibility.
440 */
441 if (!f2fs_sb_has_flexible_inline_xattr(F2FS_I_SB(dir)) &&
442 !f2fs_has_inline_xattr(dir))
443 F2FS_I(dir)->i_inline_xattr_size = 0;
444
445 f2fs_i_depth_write(dir, 1);
446 if (i_size_read(dir) < PAGE_SIZE)
447 f2fs_i_size_write(dir, PAGE_SIZE);
448 out:
449 f2fs_put_page(page, 1);
450 return err;
451 }
452
f2fs_add_inline_entries(struct inode * dir,void * inline_dentry)453 static int f2fs_add_inline_entries(struct inode *dir, void *inline_dentry)
454 {
455 struct f2fs_dentry_ptr d;
456 unsigned long bit_pos = 0;
457 int err = 0;
458
459 make_dentry_ptr_inline(dir, &d, inline_dentry);
460
461 while (bit_pos < d.max) {
462 struct f2fs_dir_entry *de;
463 struct f2fs_filename fname;
464 nid_t ino;
465 umode_t fake_mode;
466
467 if (!test_bit_le(bit_pos, d.bitmap)) {
468 bit_pos++;
469 continue;
470 }
471
472 de = &d.dentry[bit_pos];
473
474 if (unlikely(!de->name_len)) {
475 bit_pos++;
476 continue;
477 }
478
479 /*
480 * We only need the disk_name and hash to move the dentry.
481 * We don't need the original or casefolded filenames.
482 */
483 memset(&fname, 0, sizeof(fname));
484 fname.disk_name.name = d.filename[bit_pos];
485 fname.disk_name.len = le16_to_cpu(de->name_len);
486 fname.hash = de->hash_code;
487
488 ino = le32_to_cpu(de->ino);
489 fake_mode = f2fs_get_de_type(de) << S_SHIFT;
490
491 err = f2fs_add_regular_entry(dir, &fname, NULL, ino, fake_mode);
492 if (err)
493 goto punch_dentry_pages;
494
495 bit_pos += GET_DENTRY_SLOTS(le16_to_cpu(de->name_len));
496 }
497 return 0;
498 punch_dentry_pages:
499 truncate_inode_pages(&dir->i_data, 0);
500 f2fs_truncate_blocks(dir, 0, false);
501 f2fs_remove_dirty_inode(dir);
502 return err;
503 }
504
f2fs_move_rehashed_dirents(struct inode * dir,struct page * ipage,void * inline_dentry)505 static int f2fs_move_rehashed_dirents(struct inode *dir, struct page *ipage,
506 void *inline_dentry)
507 {
508 void *backup_dentry;
509 int err;
510
511 backup_dentry = f2fs_kmalloc(F2FS_I_SB(dir),
512 MAX_INLINE_DATA(dir), GFP_F2FS_ZERO);
513 if (!backup_dentry) {
514 f2fs_put_page(ipage, 1);
515 return -ENOMEM;
516 }
517
518 memcpy(backup_dentry, inline_dentry, MAX_INLINE_DATA(dir));
519 f2fs_truncate_inline_inode(dir, ipage, 0);
520
521 unlock_page(ipage);
522
523 err = f2fs_add_inline_entries(dir, backup_dentry);
524 if (err)
525 goto recover;
526
527 lock_page(ipage);
528
529 stat_dec_inline_dir(dir);
530 clear_inode_flag(dir, FI_INLINE_DENTRY);
531
532 /*
533 * should retrieve reserved space which was used to keep
534 * inline_dentry's structure for backward compatibility.
535 */
536 if (!f2fs_sb_has_flexible_inline_xattr(F2FS_I_SB(dir)) &&
537 !f2fs_has_inline_xattr(dir))
538 F2FS_I(dir)->i_inline_xattr_size = 0;
539
540 kvfree(backup_dentry);
541 return 0;
542 recover:
543 lock_page(ipage);
544 f2fs_wait_on_page_writeback(ipage, NODE, true, true);
545 memcpy(inline_dentry, backup_dentry, MAX_INLINE_DATA(dir));
546 f2fs_i_depth_write(dir, 0);
547 f2fs_i_size_write(dir, MAX_INLINE_DATA(dir));
548 set_page_dirty(ipage);
549 f2fs_put_page(ipage, 1);
550
551 kvfree(backup_dentry);
552 return err;
553 }
554
do_convert_inline_dir(struct inode * dir,struct page * ipage,void * inline_dentry)555 static int do_convert_inline_dir(struct inode *dir, struct page *ipage,
556 void *inline_dentry)
557 {
558 if (!F2FS_I(dir)->i_dir_level)
559 return f2fs_move_inline_dirents(dir, ipage, inline_dentry);
560 else
561 return f2fs_move_rehashed_dirents(dir, ipage, inline_dentry);
562 }
563
f2fs_try_convert_inline_dir(struct inode * dir,struct dentry * dentry)564 int f2fs_try_convert_inline_dir(struct inode *dir, struct dentry *dentry)
565 {
566 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
567 struct page *ipage;
568 struct f2fs_filename fname;
569 void *inline_dentry = NULL;
570 int err = 0;
571
572 if (!f2fs_has_inline_dentry(dir))
573 return 0;
574
575 f2fs_lock_op(sbi);
576
577 err = f2fs_setup_filename(dir, &dentry->d_name, 0, &fname);
578 if (err)
579 goto out;
580
581 ipage = f2fs_get_node_page(sbi, dir->i_ino);
582 if (IS_ERR(ipage)) {
583 err = PTR_ERR(ipage);
584 goto out_fname;
585 }
586
587 if (f2fs_has_enough_room(dir, ipage, &fname)) {
588 f2fs_put_page(ipage, 1);
589 goto out_fname;
590 }
591
592 inline_dentry = inline_data_addr(dir, ipage);
593
594 err = do_convert_inline_dir(dir, ipage, inline_dentry);
595 if (!err)
596 f2fs_put_page(ipage, 1);
597 out_fname:
598 f2fs_free_filename(&fname);
599 out:
600 f2fs_unlock_op(sbi);
601 return err;
602 }
603
f2fs_add_inline_entry(struct inode * dir,const struct f2fs_filename * fname,struct inode * inode,nid_t ino,umode_t mode)604 int f2fs_add_inline_entry(struct inode *dir, const struct f2fs_filename *fname,
605 struct inode *inode, nid_t ino, umode_t mode)
606 {
607 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
608 struct page *ipage;
609 unsigned int bit_pos;
610 void *inline_dentry = NULL;
611 struct f2fs_dentry_ptr d;
612 int slots = GET_DENTRY_SLOTS(fname->disk_name.len);
613 struct page *page = NULL;
614 int err = 0;
615
616 ipage = f2fs_get_node_page(sbi, dir->i_ino);
617 if (IS_ERR(ipage))
618 return PTR_ERR(ipage);
619
620 inline_dentry = inline_data_addr(dir, ipage);
621 make_dentry_ptr_inline(dir, &d, inline_dentry);
622
623 bit_pos = f2fs_room_for_filename(d.bitmap, slots, d.max);
624 if (bit_pos >= d.max) {
625 err = do_convert_inline_dir(dir, ipage, inline_dentry);
626 if (err)
627 return err;
628 err = -EAGAIN;
629 goto out;
630 }
631
632 if (inode) {
633 down_write(&F2FS_I(inode)->i_sem);
634 page = f2fs_init_inode_metadata(inode, dir, fname, ipage);
635 if (IS_ERR(page)) {
636 err = PTR_ERR(page);
637 goto fail;
638 }
639 }
640
641 f2fs_wait_on_page_writeback(ipage, NODE, true, true);
642
643 f2fs_update_dentry(ino, mode, &d, &fname->disk_name, fname->hash,
644 bit_pos);
645
646 set_page_dirty(ipage);
647
648 /* we don't need to mark_inode_dirty now */
649 if (inode) {
650 f2fs_i_pino_write(inode, dir->i_ino);
651
652 /* synchronize inode page's data from inode cache */
653 if (is_inode_flag_set(inode, FI_NEW_INODE))
654 f2fs_update_inode(inode, page);
655
656 f2fs_put_page(page, 1);
657 }
658
659 f2fs_update_parent_metadata(dir, inode, 0);
660 fail:
661 if (inode)
662 up_write(&F2FS_I(inode)->i_sem);
663 out:
664 f2fs_put_page(ipage, 1);
665 return err;
666 }
667
f2fs_delete_inline_entry(struct f2fs_dir_entry * dentry,struct page * page,struct inode * dir,struct inode * inode)668 void f2fs_delete_inline_entry(struct f2fs_dir_entry *dentry, struct page *page,
669 struct inode *dir, struct inode *inode)
670 {
671 struct f2fs_dentry_ptr d;
672 void *inline_dentry;
673 int slots = GET_DENTRY_SLOTS(le16_to_cpu(dentry->name_len));
674 unsigned int bit_pos;
675 int i;
676
677 lock_page(page);
678 f2fs_wait_on_page_writeback(page, NODE, true, true);
679
680 inline_dentry = inline_data_addr(dir, page);
681 make_dentry_ptr_inline(dir, &d, inline_dentry);
682
683 bit_pos = dentry - d.dentry;
684 for (i = 0; i < slots; i++)
685 __clear_bit_le(bit_pos + i, d.bitmap);
686
687 set_page_dirty(page);
688 f2fs_put_page(page, 1);
689
690 dir->i_ctime = dir->i_mtime = current_time(dir);
691 f2fs_mark_inode_dirty_sync(dir, false);
692
693 if (inode)
694 f2fs_drop_nlink(dir, inode);
695 }
696
f2fs_empty_inline_dir(struct inode * dir)697 bool f2fs_empty_inline_dir(struct inode *dir)
698 {
699 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
700 struct page *ipage;
701 unsigned int bit_pos = 2;
702 void *inline_dentry;
703 struct f2fs_dentry_ptr d;
704
705 ipage = f2fs_get_node_page(sbi, dir->i_ino);
706 if (IS_ERR(ipage))
707 return false;
708
709 inline_dentry = inline_data_addr(dir, ipage);
710 make_dentry_ptr_inline(dir, &d, inline_dentry);
711
712 bit_pos = find_next_bit_le(d.bitmap, d.max, bit_pos);
713
714 f2fs_put_page(ipage, 1);
715
716 if (bit_pos < d.max)
717 return false;
718
719 return true;
720 }
721
f2fs_read_inline_dir(struct file * file,struct dir_context * ctx,struct fscrypt_str * fstr)722 int f2fs_read_inline_dir(struct file *file, struct dir_context *ctx,
723 struct fscrypt_str *fstr)
724 {
725 struct inode *inode = file_inode(file);
726 struct page *ipage = NULL;
727 struct f2fs_dentry_ptr d;
728 void *inline_dentry = NULL;
729 int err;
730
731 make_dentry_ptr_inline(inode, &d, inline_dentry);
732
733 if (ctx->pos == d.max)
734 return 0;
735
736 ipage = f2fs_get_node_page(F2FS_I_SB(inode), inode->i_ino);
737 if (IS_ERR(ipage))
738 return PTR_ERR(ipage);
739
740 /*
741 * f2fs_readdir was protected by inode.i_rwsem, it is safe to access
742 * ipage without page's lock held.
743 */
744 unlock_page(ipage);
745
746 inline_dentry = inline_data_addr(inode, ipage);
747
748 make_dentry_ptr_inline(inode, &d, inline_dentry);
749
750 err = f2fs_fill_dentries(ctx, &d, 0, fstr);
751 if (!err)
752 ctx->pos = d.max;
753
754 f2fs_put_page(ipage, 0);
755 return err < 0 ? err : 0;
756 }
757
f2fs_inline_data_fiemap(struct inode * inode,struct fiemap_extent_info * fieinfo,__u64 start,__u64 len)758 int f2fs_inline_data_fiemap(struct inode *inode,
759 struct fiemap_extent_info *fieinfo, __u64 start, __u64 len)
760 {
761 __u64 byteaddr, ilen;
762 __u32 flags = FIEMAP_EXTENT_DATA_INLINE | FIEMAP_EXTENT_NOT_ALIGNED |
763 FIEMAP_EXTENT_LAST;
764 struct node_info ni;
765 struct page *ipage;
766 int err = 0;
767
768 ipage = f2fs_get_node_page(F2FS_I_SB(inode), inode->i_ino);
769 if (IS_ERR(ipage))
770 return PTR_ERR(ipage);
771
772 if ((S_ISREG(inode->i_mode) || S_ISLNK(inode->i_mode)) &&
773 !f2fs_has_inline_data(inode)) {
774 err = -EAGAIN;
775 goto out;
776 }
777
778 if (S_ISDIR(inode->i_mode) && !f2fs_has_inline_dentry(inode)) {
779 err = -EAGAIN;
780 goto out;
781 }
782
783 ilen = min_t(size_t, MAX_INLINE_DATA(inode), i_size_read(inode));
784 if (start >= ilen)
785 goto out;
786 if (start + len < ilen)
787 ilen = start + len;
788 ilen -= start;
789
790 err = f2fs_get_node_info(F2FS_I_SB(inode), inode->i_ino, &ni);
791 if (err)
792 goto out;
793
794 byteaddr = (__u64)ni.blk_addr << inode->i_sb->s_blocksize_bits;
795 byteaddr += (char *)inline_data_addr(inode, ipage) -
796 (char *)F2FS_INODE(ipage);
797 err = fiemap_fill_next_extent(fieinfo, start, byteaddr, ilen, flags);
798 out:
799 f2fs_put_page(ipage, 1);
800 return err;
801 }
802