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 #include <trace/events/android_fs.h>
17
support_inline_data(struct inode * inode)18 static bool support_inline_data(struct inode *inode)
19 {
20 if (f2fs_is_atomic_file(inode))
21 return false;
22 if (!S_ISREG(inode->i_mode) && !S_ISLNK(inode->i_mode))
23 return false;
24 if (i_size_read(inode) > MAX_INLINE_DATA(inode))
25 return false;
26 return true;
27 }
28
f2fs_may_inline_data(struct inode * inode)29 bool f2fs_may_inline_data(struct inode *inode)
30 {
31 if (!support_inline_data(inode))
32 return false;
33
34 return !f2fs_post_read_required(inode);
35 }
36
f2fs_sanity_check_inline_data(struct inode * inode)37 bool f2fs_sanity_check_inline_data(struct inode *inode)
38 {
39 if (!f2fs_has_inline_data(inode))
40 return false;
41
42 if (!support_inline_data(inode))
43 return true;
44
45 /*
46 * used by sanity_check_inode(), when disk layout fields has not
47 * been synchronized to inmem fields.
48 */
49 return (S_ISREG(inode->i_mode) &&
50 (file_is_encrypt(inode) || file_is_verity(inode) ||
51 (F2FS_I(inode)->i_flags & F2FS_COMPR_FL)));
52 }
53
f2fs_may_inline_dentry(struct inode * inode)54 bool f2fs_may_inline_dentry(struct inode *inode)
55 {
56 if (!test_opt(F2FS_I_SB(inode), INLINE_DENTRY))
57 return false;
58
59 if (!S_ISDIR(inode->i_mode))
60 return false;
61
62 return true;
63 }
64
f2fs_do_read_inline_data(struct page * page,struct page * ipage)65 void f2fs_do_read_inline_data(struct page *page, struct page *ipage)
66 {
67 struct inode *inode = page->mapping->host;
68 void *src_addr, *dst_addr;
69
70 if (PageUptodate(page))
71 return;
72
73 f2fs_bug_on(F2FS_P_SB(page), page->index);
74
75 zero_user_segment(page, MAX_INLINE_DATA(inode), PAGE_SIZE);
76
77 /* Copy the whole inline data block */
78 src_addr = inline_data_addr(inode, ipage);
79 dst_addr = kmap_atomic(page);
80 memcpy(dst_addr, src_addr, MAX_INLINE_DATA(inode));
81 flush_dcache_page(page);
82 kunmap_atomic(dst_addr);
83 if (!PageUptodate(page))
84 SetPageUptodate(page);
85 }
86
f2fs_truncate_inline_inode(struct inode * inode,struct page * ipage,u64 from)87 void f2fs_truncate_inline_inode(struct inode *inode,
88 struct page *ipage, u64 from)
89 {
90 void *addr;
91
92 if (from >= MAX_INLINE_DATA(inode))
93 return;
94
95 addr = inline_data_addr(inode, ipage);
96
97 f2fs_wait_on_page_writeback(ipage, NODE, true, true);
98 memset(addr + from, 0, MAX_INLINE_DATA(inode) - from);
99 set_page_dirty(ipage);
100
101 if (from == 0)
102 clear_inode_flag(inode, FI_DATA_EXIST);
103 }
104
f2fs_read_inline_data(struct inode * inode,struct page * page)105 int f2fs_read_inline_data(struct inode *inode, struct page *page)
106 {
107 struct page *ipage;
108
109 if (trace_android_fs_dataread_start_enabled()) {
110 char *path, pathbuf[MAX_TRACE_PATHBUF_LEN];
111
112 path = android_fstrace_get_pathname(pathbuf,
113 MAX_TRACE_PATHBUF_LEN,
114 inode);
115 trace_android_fs_dataread_start(inode, page_offset(page),
116 PAGE_SIZE, current->pid,
117 path, current->comm);
118 }
119
120 ipage = f2fs_get_node_page(F2FS_I_SB(inode), inode->i_ino);
121 if (IS_ERR(ipage)) {
122 trace_android_fs_dataread_end(inode, page_offset(page),
123 PAGE_SIZE);
124 unlock_page(page);
125 return PTR_ERR(ipage);
126 }
127
128 if (!f2fs_has_inline_data(inode)) {
129 f2fs_put_page(ipage, 1);
130 trace_android_fs_dataread_end(inode, page_offset(page),
131 PAGE_SIZE);
132 return -EAGAIN;
133 }
134
135 if (page->index)
136 zero_user_segment(page, 0, PAGE_SIZE);
137 else
138 f2fs_do_read_inline_data(page, ipage);
139
140 if (!PageUptodate(page))
141 SetPageUptodate(page);
142 f2fs_put_page(ipage, 1);
143 trace_android_fs_dataread_end(inode, page_offset(page),
144 PAGE_SIZE);
145 unlock_page(page);
146 return 0;
147 }
148
f2fs_convert_inline_page(struct dnode_of_data * dn,struct page * page)149 int f2fs_convert_inline_page(struct dnode_of_data *dn, struct page *page)
150 {
151 struct f2fs_io_info fio = {
152 .sbi = F2FS_I_SB(dn->inode),
153 .ino = dn->inode->i_ino,
154 .type = DATA,
155 .op = REQ_OP_WRITE,
156 .op_flags = REQ_SYNC | REQ_PRIO,
157 .page = page,
158 .encrypted_page = NULL,
159 .io_type = FS_DATA_IO,
160 };
161 struct node_info ni;
162 int dirty, err;
163
164 if (!f2fs_exist_data(dn->inode))
165 goto clear_out;
166
167 err = f2fs_reserve_block(dn, 0);
168 if (err)
169 return err;
170
171 err = f2fs_get_node_info(fio.sbi, dn->nid, &ni, false);
172 if (err) {
173 f2fs_truncate_data_blocks_range(dn, 1);
174 f2fs_put_dnode(dn);
175 return err;
176 }
177
178 fio.version = ni.version;
179
180 if (unlikely(dn->data_blkaddr != NEW_ADDR)) {
181 f2fs_put_dnode(dn);
182 set_sbi_flag(fio.sbi, SBI_NEED_FSCK);
183 f2fs_warn(fio.sbi, "%s: corrupted inline inode ino=%lx, i_addr[0]:0x%x, run fsck to fix.",
184 __func__, dn->inode->i_ino, dn->data_blkaddr);
185 return -EFSCORRUPTED;
186 }
187
188 f2fs_bug_on(F2FS_P_SB(page), PageWriteback(page));
189
190 f2fs_do_read_inline_data(page, dn->inode_page);
191 set_page_dirty(page);
192
193 /* clear dirty state */
194 dirty = clear_page_dirty_for_io(page);
195
196 /* write data page to try to make data consistent */
197 set_page_writeback(page);
198 ClearPageError(page);
199 fio.old_blkaddr = dn->data_blkaddr;
200 set_inode_flag(dn->inode, FI_HOT_DATA);
201 f2fs_outplace_write_data(dn, &fio);
202 f2fs_wait_on_page_writeback(page, DATA, true, true);
203 if (dirty) {
204 inode_dec_dirty_pages(dn->inode);
205 f2fs_remove_dirty_inode(dn->inode);
206 }
207
208 /* this converted inline_data should be recovered. */
209 set_inode_flag(dn->inode, FI_APPEND_WRITE);
210
211 /* clear inline data and flag after data writeback */
212 f2fs_truncate_inline_inode(dn->inode, dn->inode_page, 0);
213 clear_page_private_inline(dn->inode_page);
214 clear_out:
215 stat_dec_inline_inode(dn->inode);
216 clear_inode_flag(dn->inode, FI_INLINE_DATA);
217 f2fs_put_dnode(dn);
218 return 0;
219 }
220
f2fs_convert_inline_inode(struct inode * inode)221 int f2fs_convert_inline_inode(struct inode *inode)
222 {
223 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
224 struct dnode_of_data dn;
225 struct page *ipage, *page;
226 int err = 0;
227
228 if (!f2fs_has_inline_data(inode) ||
229 f2fs_hw_is_readonly(sbi) || f2fs_readonly(sbi->sb))
230 return 0;
231
232 err = dquot_initialize(inode);
233 if (err)
234 return err;
235
236 page = f2fs_grab_cache_page(inode->i_mapping, 0, false);
237 if (!page)
238 return -ENOMEM;
239
240 f2fs_lock_op(sbi);
241
242 ipage = f2fs_get_node_page(sbi, inode->i_ino);
243 if (IS_ERR(ipage)) {
244 err = PTR_ERR(ipage);
245 goto out;
246 }
247
248 set_new_dnode(&dn, inode, ipage, ipage, 0);
249
250 if (f2fs_has_inline_data(inode))
251 err = f2fs_convert_inline_page(&dn, page);
252
253 f2fs_put_dnode(&dn);
254 out:
255 f2fs_unlock_op(sbi);
256
257 f2fs_put_page(page, 1);
258
259 if (!err)
260 f2fs_balance_fs(sbi, dn.node_changed);
261
262 return err;
263 }
264
f2fs_write_inline_data(struct inode * inode,struct page * page)265 int f2fs_write_inline_data(struct inode *inode, struct page *page)
266 {
267 void *src_addr, *dst_addr;
268 struct dnode_of_data dn;
269 int err;
270
271 set_new_dnode(&dn, inode, NULL, NULL, 0);
272 err = f2fs_get_dnode_of_data(&dn, 0, LOOKUP_NODE);
273 if (err)
274 return err;
275
276 if (!f2fs_has_inline_data(inode)) {
277 f2fs_put_dnode(&dn);
278 return -EAGAIN;
279 }
280
281 f2fs_bug_on(F2FS_I_SB(inode), page->index);
282
283 f2fs_wait_on_page_writeback(dn.inode_page, NODE, true, true);
284 src_addr = kmap_atomic(page);
285 dst_addr = inline_data_addr(inode, dn.inode_page);
286 memcpy(dst_addr, src_addr, MAX_INLINE_DATA(inode));
287 kunmap_atomic(src_addr);
288 set_page_dirty(dn.inode_page);
289
290 f2fs_clear_page_cache_dirty_tag(page);
291
292 set_inode_flag(inode, FI_APPEND_WRITE);
293 set_inode_flag(inode, FI_DATA_EXIST);
294
295 clear_page_private_inline(dn.inode_page);
296 f2fs_put_dnode(&dn);
297 return 0;
298 }
299
f2fs_recover_inline_data(struct inode * inode,struct page * npage)300 int f2fs_recover_inline_data(struct inode *inode, struct page *npage)
301 {
302 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
303 struct f2fs_inode *ri = NULL;
304 void *src_addr, *dst_addr;
305 struct page *ipage;
306
307 /*
308 * The inline_data recovery policy is as follows.
309 * [prev.] [next] of inline_data flag
310 * o o -> recover inline_data
311 * o x -> remove inline_data, and then recover data blocks
312 * x o -> remove data blocks, and then recover inline_data
313 * x x -> recover data blocks
314 */
315 if (IS_INODE(npage))
316 ri = F2FS_INODE(npage);
317
318 if (f2fs_has_inline_data(inode) &&
319 ri && (ri->i_inline & F2FS_INLINE_DATA)) {
320 process_inline:
321 ipage = f2fs_get_node_page(sbi, inode->i_ino);
322 if (IS_ERR(ipage))
323 return PTR_ERR(ipage);
324
325 f2fs_wait_on_page_writeback(ipage, NODE, true, true);
326
327 src_addr = inline_data_addr(inode, npage);
328 dst_addr = inline_data_addr(inode, ipage);
329 memcpy(dst_addr, src_addr, MAX_INLINE_DATA(inode));
330
331 set_inode_flag(inode, FI_INLINE_DATA);
332 set_inode_flag(inode, FI_DATA_EXIST);
333
334 set_page_dirty(ipage);
335 f2fs_put_page(ipage, 1);
336 return 1;
337 }
338
339 if (f2fs_has_inline_data(inode)) {
340 ipage = f2fs_get_node_page(sbi, inode->i_ino);
341 if (IS_ERR(ipage))
342 return PTR_ERR(ipage);
343 f2fs_truncate_inline_inode(inode, ipage, 0);
344 stat_dec_inline_inode(inode);
345 clear_inode_flag(inode, FI_INLINE_DATA);
346 f2fs_put_page(ipage, 1);
347 } else if (ri && (ri->i_inline & F2FS_INLINE_DATA)) {
348 int ret;
349
350 ret = f2fs_truncate_blocks(inode, 0, false);
351 if (ret)
352 return ret;
353 stat_inc_inline_inode(inode);
354 goto process_inline;
355 }
356 return 0;
357 }
358
f2fs_find_in_inline_dir(struct inode * dir,const struct f2fs_filename * fname,struct page ** res_page)359 struct f2fs_dir_entry *f2fs_find_in_inline_dir(struct inode *dir,
360 const struct f2fs_filename *fname,
361 struct page **res_page)
362 {
363 struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
364 struct f2fs_dir_entry *de;
365 struct f2fs_dentry_ptr d;
366 struct page *ipage;
367 void *inline_dentry;
368
369 ipage = f2fs_get_node_page(sbi, dir->i_ino);
370 if (IS_ERR(ipage)) {
371 *res_page = ipage;
372 return NULL;
373 }
374
375 inline_dentry = inline_data_addr(dir, ipage);
376
377 make_dentry_ptr_inline(dir, &d, inline_dentry);
378 de = f2fs_find_target_dentry(&d, fname, NULL);
379 unlock_page(ipage);
380 if (IS_ERR(de)) {
381 *res_page = ERR_CAST(de);
382 de = NULL;
383 }
384 if (de)
385 *res_page = ipage;
386 else
387 f2fs_put_page(ipage, 0);
388
389 return de;
390 }
391
f2fs_make_empty_inline_dir(struct inode * inode,struct inode * parent,struct page * ipage)392 int f2fs_make_empty_inline_dir(struct inode *inode, struct inode *parent,
393 struct page *ipage)
394 {
395 struct f2fs_dentry_ptr d;
396 void *inline_dentry;
397
398 inline_dentry = inline_data_addr(inode, ipage);
399
400 make_dentry_ptr_inline(inode, &d, inline_dentry);
401 f2fs_do_make_empty_dir(inode, parent, &d);
402
403 set_page_dirty(ipage);
404
405 /* update i_size to MAX_INLINE_DATA */
406 if (i_size_read(inode) < MAX_INLINE_DATA(inode))
407 f2fs_i_size_write(inode, MAX_INLINE_DATA(inode));
408 return 0;
409 }
410
411 /*
412 * NOTE: ipage is grabbed by caller, but if any error occurs, we should
413 * release ipage in this function.
414 */
f2fs_move_inline_dirents(struct inode * dir,struct page * ipage,void * inline_dentry)415 static int f2fs_move_inline_dirents(struct inode *dir, struct page *ipage,
416 void *inline_dentry)
417 {
418 struct page *page;
419 struct dnode_of_data dn;
420 struct f2fs_dentry_block *dentry_blk;
421 struct f2fs_dentry_ptr src, dst;
422 int err;
423
424 page = f2fs_grab_cache_page(dir->i_mapping, 0, true);
425 if (!page) {
426 f2fs_put_page(ipage, 1);
427 return -ENOMEM;
428 }
429
430 set_new_dnode(&dn, dir, ipage, NULL, 0);
431 err = f2fs_reserve_block(&dn, 0);
432 if (err)
433 goto out;
434
435 if (unlikely(dn.data_blkaddr != NEW_ADDR)) {
436 f2fs_put_dnode(&dn);
437 set_sbi_flag(F2FS_P_SB(page), SBI_NEED_FSCK);
438 f2fs_warn(F2FS_P_SB(page), "%s: corrupted inline inode ino=%lx, i_addr[0]:0x%x, run fsck to fix.",
439 __func__, dir->i_ino, dn.data_blkaddr);
440 err = -EFSCORRUPTED;
441 goto out;
442 }
443
444 f2fs_wait_on_page_writeback(page, DATA, true, true);
445
446 dentry_blk = page_address(page);
447
448 make_dentry_ptr_inline(dir, &src, inline_dentry);
449 make_dentry_ptr_block(dir, &dst, dentry_blk);
450
451 /* copy data from inline dentry block to new dentry block */
452 memcpy(dst.bitmap, src.bitmap, src.nr_bitmap);
453 memset(dst.bitmap + src.nr_bitmap, 0, dst.nr_bitmap - src.nr_bitmap);
454 /*
455 * we do not need to zero out remainder part of dentry and filename
456 * field, since we have used bitmap for marking the usage status of
457 * them, besides, we can also ignore copying/zeroing reserved space
458 * of dentry block, because them haven't been used so far.
459 */
460 memcpy(dst.dentry, src.dentry, SIZE_OF_DIR_ENTRY * src.max);
461 memcpy(dst.filename, src.filename, src.max * F2FS_SLOT_LEN);
462
463 if (!PageUptodate(page))
464 SetPageUptodate(page);
465 set_page_dirty(page);
466
467 /* clear inline dir and flag after data writeback */
468 f2fs_truncate_inline_inode(dir, ipage, 0);
469
470 stat_dec_inline_dir(dir);
471 clear_inode_flag(dir, FI_INLINE_DENTRY);
472
473 /*
474 * should retrieve reserved space which was used to keep
475 * inline_dentry's structure for backward compatibility.
476 */
477 if (!f2fs_sb_has_flexible_inline_xattr(F2FS_I_SB(dir)) &&
478 !f2fs_has_inline_xattr(dir))
479 F2FS_I(dir)->i_inline_xattr_size = 0;
480
481 f2fs_i_depth_write(dir, 1);
482 if (i_size_read(dir) < PAGE_SIZE)
483 f2fs_i_size_write(dir, PAGE_SIZE);
484 out:
485 f2fs_put_page(page, 1);
486 return err;
487 }
488
f2fs_add_inline_entries(struct inode * dir,void * inline_dentry)489 static int f2fs_add_inline_entries(struct inode *dir, void *inline_dentry)
490 {
491 struct f2fs_dentry_ptr d;
492 unsigned long bit_pos = 0;
493 int err = 0;
494
495 make_dentry_ptr_inline(dir, &d, inline_dentry);
496
497 while (bit_pos < d.max) {
498 struct f2fs_dir_entry *de;
499 struct f2fs_filename fname;
500 nid_t ino;
501 umode_t fake_mode;
502
503 if (!test_bit_le(bit_pos, d.bitmap)) {
504 bit_pos++;
505 continue;
506 }
507
508 de = &d.dentry[bit_pos];
509
510 if (unlikely(!de->name_len)) {
511 bit_pos++;
512 continue;
513 }
514
515 /*
516 * We only need the disk_name and hash to move the dentry.
517 * We don't need the original or casefolded filenames.
518 */
519 memset(&fname, 0, sizeof(fname));
520 fname.disk_name.name = d.filename[bit_pos];
521 fname.disk_name.len = le16_to_cpu(de->name_len);
522 fname.hash = de->hash_code;
523
524 ino = le32_to_cpu(de->ino);
525 fake_mode = f2fs_get_de_type(de) << S_SHIFT;
526
527 err = f2fs_add_regular_entry(dir, &fname, NULL, ino, fake_mode);
528 if (err)
529 goto punch_dentry_pages;
530
531 bit_pos += GET_DENTRY_SLOTS(le16_to_cpu(de->name_len));
532 }
533 return 0;
534 punch_dentry_pages:
535 truncate_inode_pages(&dir->i_data, 0);
536 f2fs_truncate_blocks(dir, 0, false);
537 f2fs_remove_dirty_inode(dir);
538 return err;
539 }
540
f2fs_move_rehashed_dirents(struct inode * dir,struct page * ipage,void * inline_dentry)541 static int f2fs_move_rehashed_dirents(struct inode *dir, struct page *ipage,
542 void *inline_dentry)
543 {
544 void *backup_dentry;
545 int err;
546
547 backup_dentry = f2fs_kmalloc(F2FS_I_SB(dir),
548 MAX_INLINE_DATA(dir), GFP_F2FS_ZERO);
549 if (!backup_dentry) {
550 f2fs_put_page(ipage, 1);
551 return -ENOMEM;
552 }
553
554 memcpy(backup_dentry, inline_dentry, MAX_INLINE_DATA(dir));
555 f2fs_truncate_inline_inode(dir, ipage, 0);
556
557 unlock_page(ipage);
558
559 err = f2fs_add_inline_entries(dir, backup_dentry);
560 if (err)
561 goto recover;
562
563 lock_page(ipage);
564
565 stat_dec_inline_dir(dir);
566 clear_inode_flag(dir, FI_INLINE_DENTRY);
567
568 /*
569 * should retrieve reserved space which was used to keep
570 * inline_dentry's structure for backward compatibility.
571 */
572 if (!f2fs_sb_has_flexible_inline_xattr(F2FS_I_SB(dir)) &&
573 !f2fs_has_inline_xattr(dir))
574 F2FS_I(dir)->i_inline_xattr_size = 0;
575
576 kfree(backup_dentry);
577 return 0;
578 recover:
579 lock_page(ipage);
580 f2fs_wait_on_page_writeback(ipage, NODE, true, true);
581 memcpy(inline_dentry, backup_dentry, MAX_INLINE_DATA(dir));
582 f2fs_i_depth_write(dir, 0);
583 f2fs_i_size_write(dir, MAX_INLINE_DATA(dir));
584 set_page_dirty(ipage);
585 f2fs_put_page(ipage, 1);
586
587 kfree(backup_dentry);
588 return err;
589 }
590
do_convert_inline_dir(struct inode * dir,struct page * ipage,void * inline_dentry)591 static int do_convert_inline_dir(struct inode *dir, struct page *ipage,
592 void *inline_dentry)
593 {
594 if (!F2FS_I(dir)->i_dir_level)
595 return f2fs_move_inline_dirents(dir, ipage, inline_dentry);
596 else
597 return f2fs_move_rehashed_dirents(dir, ipage, inline_dentry);
598 }
599
f2fs_try_convert_inline_dir(struct inode * dir,struct dentry * dentry)600 int f2fs_try_convert_inline_dir(struct inode *dir, struct dentry *dentry)
601 {
602 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
603 struct page *ipage;
604 struct f2fs_filename fname;
605 void *inline_dentry = NULL;
606 int err = 0;
607
608 if (!f2fs_has_inline_dentry(dir))
609 return 0;
610
611 f2fs_lock_op(sbi);
612
613 err = f2fs_setup_filename(dir, &dentry->d_name, 0, &fname);
614 if (err)
615 goto out;
616
617 ipage = f2fs_get_node_page(sbi, dir->i_ino);
618 if (IS_ERR(ipage)) {
619 err = PTR_ERR(ipage);
620 goto out_fname;
621 }
622
623 if (f2fs_has_enough_room(dir, ipage, &fname)) {
624 f2fs_put_page(ipage, 1);
625 goto out_fname;
626 }
627
628 inline_dentry = inline_data_addr(dir, ipage);
629
630 err = do_convert_inline_dir(dir, ipage, inline_dentry);
631 if (!err)
632 f2fs_put_page(ipage, 1);
633 out_fname:
634 f2fs_free_filename(&fname);
635 out:
636 f2fs_unlock_op(sbi);
637 return err;
638 }
639
f2fs_add_inline_entry(struct inode * dir,const struct f2fs_filename * fname,struct inode * inode,nid_t ino,umode_t mode)640 int f2fs_add_inline_entry(struct inode *dir, const struct f2fs_filename *fname,
641 struct inode *inode, nid_t ino, umode_t mode)
642 {
643 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
644 struct page *ipage;
645 unsigned int bit_pos;
646 void *inline_dentry = NULL;
647 struct f2fs_dentry_ptr d;
648 int slots = GET_DENTRY_SLOTS(fname->disk_name.len);
649 struct page *page = NULL;
650 int err = 0;
651
652 ipage = f2fs_get_node_page(sbi, dir->i_ino);
653 if (IS_ERR(ipage))
654 return PTR_ERR(ipage);
655
656 inline_dentry = inline_data_addr(dir, ipage);
657 make_dentry_ptr_inline(dir, &d, inline_dentry);
658
659 bit_pos = f2fs_room_for_filename(d.bitmap, slots, d.max);
660 if (bit_pos >= d.max) {
661 err = do_convert_inline_dir(dir, ipage, inline_dentry);
662 if (err)
663 return err;
664 err = -EAGAIN;
665 goto out;
666 }
667
668 if (inode) {
669 f2fs_down_write(&F2FS_I(inode)->i_sem);
670 page = f2fs_init_inode_metadata(inode, dir, fname, ipage);
671 if (IS_ERR(page)) {
672 err = PTR_ERR(page);
673 goto fail;
674 }
675 }
676
677 f2fs_wait_on_page_writeback(ipage, NODE, true, true);
678
679 f2fs_update_dentry(ino, mode, &d, &fname->disk_name, fname->hash,
680 bit_pos);
681
682 set_page_dirty(ipage);
683
684 /* we don't need to mark_inode_dirty now */
685 if (inode) {
686 f2fs_i_pino_write(inode, dir->i_ino);
687
688 /* synchronize inode page's data from inode cache */
689 if (is_inode_flag_set(inode, FI_NEW_INODE))
690 f2fs_update_inode(inode, page);
691
692 f2fs_put_page(page, 1);
693 }
694
695 f2fs_update_parent_metadata(dir, inode, 0);
696 fail:
697 if (inode)
698 f2fs_up_write(&F2FS_I(inode)->i_sem);
699 out:
700 f2fs_put_page(ipage, 1);
701 return err;
702 }
703
f2fs_delete_inline_entry(struct f2fs_dir_entry * dentry,struct page * page,struct inode * dir,struct inode * inode)704 void f2fs_delete_inline_entry(struct f2fs_dir_entry *dentry, struct page *page,
705 struct inode *dir, struct inode *inode)
706 {
707 struct f2fs_dentry_ptr d;
708 void *inline_dentry;
709 int slots = GET_DENTRY_SLOTS(le16_to_cpu(dentry->name_len));
710 unsigned int bit_pos;
711 int i;
712
713 lock_page(page);
714 f2fs_wait_on_page_writeback(page, NODE, true, true);
715
716 inline_dentry = inline_data_addr(dir, page);
717 make_dentry_ptr_inline(dir, &d, inline_dentry);
718
719 bit_pos = dentry - d.dentry;
720 for (i = 0; i < slots; i++)
721 __clear_bit_le(bit_pos + i, d.bitmap);
722
723 set_page_dirty(page);
724 f2fs_put_page(page, 1);
725
726 dir->i_ctime = dir->i_mtime = current_time(dir);
727 f2fs_mark_inode_dirty_sync(dir, false);
728
729 if (inode)
730 f2fs_drop_nlink(dir, inode);
731 }
732
f2fs_empty_inline_dir(struct inode * dir)733 bool f2fs_empty_inline_dir(struct inode *dir)
734 {
735 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
736 struct page *ipage;
737 unsigned int bit_pos = 2;
738 void *inline_dentry;
739 struct f2fs_dentry_ptr d;
740
741 ipage = f2fs_get_node_page(sbi, dir->i_ino);
742 if (IS_ERR(ipage))
743 return false;
744
745 inline_dentry = inline_data_addr(dir, ipage);
746 make_dentry_ptr_inline(dir, &d, inline_dentry);
747
748 bit_pos = find_next_bit_le(d.bitmap, d.max, bit_pos);
749
750 f2fs_put_page(ipage, 1);
751
752 if (bit_pos < d.max)
753 return false;
754
755 return true;
756 }
757
f2fs_read_inline_dir(struct file * file,struct dir_context * ctx,struct fscrypt_str * fstr)758 int f2fs_read_inline_dir(struct file *file, struct dir_context *ctx,
759 struct fscrypt_str *fstr)
760 {
761 struct inode *inode = file_inode(file);
762 struct page *ipage = NULL;
763 struct f2fs_dentry_ptr d;
764 void *inline_dentry = NULL;
765 int err;
766
767 make_dentry_ptr_inline(inode, &d, inline_dentry);
768
769 if (ctx->pos == d.max)
770 return 0;
771
772 ipage = f2fs_get_node_page(F2FS_I_SB(inode), inode->i_ino);
773 if (IS_ERR(ipage))
774 return PTR_ERR(ipage);
775
776 /*
777 * f2fs_readdir was protected by inode.i_rwsem, it is safe to access
778 * ipage without page's lock held.
779 */
780 unlock_page(ipage);
781
782 inline_dentry = inline_data_addr(inode, ipage);
783
784 make_dentry_ptr_inline(inode, &d, inline_dentry);
785
786 err = f2fs_fill_dentries(ctx, &d, 0, fstr);
787 if (!err)
788 ctx->pos = d.max;
789
790 f2fs_put_page(ipage, 0);
791 return err < 0 ? err : 0;
792 }
793
f2fs_inline_data_fiemap(struct inode * inode,struct fiemap_extent_info * fieinfo,__u64 start,__u64 len)794 int f2fs_inline_data_fiemap(struct inode *inode,
795 struct fiemap_extent_info *fieinfo, __u64 start, __u64 len)
796 {
797 __u64 byteaddr, ilen;
798 __u32 flags = FIEMAP_EXTENT_DATA_INLINE | FIEMAP_EXTENT_NOT_ALIGNED |
799 FIEMAP_EXTENT_LAST;
800 struct node_info ni;
801 struct page *ipage;
802 int err = 0;
803
804 ipage = f2fs_get_node_page(F2FS_I_SB(inode), inode->i_ino);
805 if (IS_ERR(ipage))
806 return PTR_ERR(ipage);
807
808 if ((S_ISREG(inode->i_mode) || S_ISLNK(inode->i_mode)) &&
809 !f2fs_has_inline_data(inode)) {
810 err = -EAGAIN;
811 goto out;
812 }
813
814 if (S_ISDIR(inode->i_mode) && !f2fs_has_inline_dentry(inode)) {
815 err = -EAGAIN;
816 goto out;
817 }
818
819 ilen = min_t(size_t, MAX_INLINE_DATA(inode), i_size_read(inode));
820 if (start >= ilen)
821 goto out;
822 if (start + len < ilen)
823 ilen = start + len;
824 ilen -= start;
825
826 err = f2fs_get_node_info(F2FS_I_SB(inode), inode->i_ino, &ni, false);
827 if (err)
828 goto out;
829
830 byteaddr = (__u64)ni.blk_addr << inode->i_sb->s_blocksize_bits;
831 byteaddr += (char *)inline_data_addr(inode, ipage) -
832 (char *)F2FS_INODE(ipage);
833 err = fiemap_fill_next_extent(fieinfo, start, byteaddr, ilen, flags);
834 trace_f2fs_fiemap(inode, start, byteaddr, ilen, flags, err);
835 out:
836 f2fs_put_page(ipage, 1);
837 return err;
838 }
839