3 * Copyright (c) 2013, Intel Corporation
4 * Authors: Huajun Li <huajun.li@intel.com>
5 * Haicheng Li <haicheng.li@intel.com>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
12 #include <linux/f2fs_fs.h>
17 bool f2fs_may_inline_data(struct inode
*inode
)
19 if (f2fs_is_atomic_file(inode
))
22 if (!S_ISREG(inode
->i_mode
) && !S_ISLNK(inode
->i_mode
))
25 if (i_size_read(inode
) > MAX_INLINE_DATA
)
28 if (f2fs_encrypted_inode(inode
) && S_ISREG(inode
->i_mode
))
34 bool f2fs_may_inline_dentry(struct inode
*inode
)
36 if (!test_opt(F2FS_I_SB(inode
), INLINE_DENTRY
))
39 if (!S_ISDIR(inode
->i_mode
))
45 void read_inline_data(struct page
*page
, struct page
*ipage
)
47 void *src_addr
, *dst_addr
;
49 if (PageUptodate(page
))
52 f2fs_bug_on(F2FS_P_SB(page
), page
->index
);
54 zero_user_segment(page
, MAX_INLINE_DATA
, PAGE_SIZE
);
56 /* Copy the whole inline data block */
57 src_addr
= inline_data_addr(ipage
);
58 dst_addr
= kmap_atomic(page
);
59 memcpy(dst_addr
, src_addr
, MAX_INLINE_DATA
);
60 flush_dcache_page(page
);
61 kunmap_atomic(dst_addr
);
62 SetPageUptodate(page
);
65 bool truncate_inline_inode(struct page
*ipage
, u64 from
)
69 if (from
>= MAX_INLINE_DATA
)
72 addr
= inline_data_addr(ipage
);
74 f2fs_wait_on_page_writeback(ipage
, NODE
, true);
75 memset(addr
+ from
, 0, MAX_INLINE_DATA
- from
);
80 int f2fs_read_inline_data(struct inode
*inode
, struct page
*page
)
84 ipage
= get_node_page(F2FS_I_SB(inode
), inode
->i_ino
);
87 return PTR_ERR(ipage
);
90 if (!f2fs_has_inline_data(inode
)) {
91 f2fs_put_page(ipage
, 1);
96 zero_user_segment(page
, 0, PAGE_SIZE
);
98 read_inline_data(page
, ipage
);
100 SetPageUptodate(page
);
101 f2fs_put_page(ipage
, 1);
106 int f2fs_convert_inline_page(struct dnode_of_data
*dn
, struct page
*page
)
108 struct f2fs_io_info fio
= {
109 .sbi
= F2FS_I_SB(dn
->inode
),
111 .rw
= WRITE_SYNC
| REQ_PRIO
,
113 .encrypted_page
= NULL
,
117 if (!f2fs_exist_data(dn
->inode
))
120 err
= f2fs_reserve_block(dn
, 0);
124 f2fs_bug_on(F2FS_P_SB(page
), PageWriteback(page
));
126 read_inline_data(page
, dn
->inode_page
);
127 set_page_dirty(page
);
129 /* clear dirty state */
130 dirty
= clear_page_dirty_for_io(page
);
132 /* write data page to try to make data consistent */
133 set_page_writeback(page
);
134 fio
.old_blkaddr
= dn
->data_blkaddr
;
135 write_data_page(dn
, &fio
);
136 f2fs_wait_on_page_writeback(page
, DATA
, true);
138 inode_dec_dirty_pages(dn
->inode
);
140 /* this converted inline_data should be recovered. */
141 set_inode_flag(dn
->inode
, FI_APPEND_WRITE
);
143 /* clear inline data and flag after data writeback */
144 truncate_inline_inode(dn
->inode_page
, 0);
145 clear_inline_node(dn
->inode_page
);
147 stat_dec_inline_inode(dn
->inode
);
148 f2fs_clear_inline_inode(dn
->inode
);
154 int f2fs_convert_inline_inode(struct inode
*inode
)
156 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
157 struct dnode_of_data dn
;
158 struct page
*ipage
, *page
;
161 if (!f2fs_has_inline_data(inode
))
164 page
= f2fs_grab_cache_page(inode
->i_mapping
, 0, false);
170 ipage
= get_node_page(sbi
, inode
->i_ino
);
172 err
= PTR_ERR(ipage
);
176 set_new_dnode(&dn
, inode
, ipage
, ipage
, 0);
178 if (f2fs_has_inline_data(inode
))
179 err
= f2fs_convert_inline_page(&dn
, page
);
185 f2fs_put_page(page
, 1);
187 f2fs_balance_fs(sbi
, dn
.node_changed
);
192 int f2fs_write_inline_data(struct inode
*inode
, struct page
*page
)
194 void *src_addr
, *dst_addr
;
195 struct dnode_of_data dn
;
198 set_new_dnode(&dn
, inode
, NULL
, NULL
, 0);
199 err
= get_dnode_of_data(&dn
, 0, LOOKUP_NODE
);
203 if (!f2fs_has_inline_data(inode
)) {
208 f2fs_bug_on(F2FS_I_SB(inode
), page
->index
);
210 f2fs_wait_on_page_writeback(dn
.inode_page
, NODE
, true);
211 src_addr
= kmap_atomic(page
);
212 dst_addr
= inline_data_addr(dn
.inode_page
);
213 memcpy(dst_addr
, src_addr
, MAX_INLINE_DATA
);
214 kunmap_atomic(src_addr
);
216 set_inode_flag(inode
, FI_APPEND_WRITE
);
217 set_inode_flag(inode
, FI_DATA_EXIST
);
219 sync_inode_page(&dn
);
220 clear_inline_node(dn
.inode_page
);
225 bool recover_inline_data(struct inode
*inode
, struct page
*npage
)
227 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
228 struct f2fs_inode
*ri
= NULL
;
229 void *src_addr
, *dst_addr
;
233 * The inline_data recovery policy is as follows.
234 * [prev.] [next] of inline_data flag
235 * o o -> recover inline_data
236 * o x -> remove inline_data, and then recover data blocks
237 * x o -> remove inline_data, and then recover inline_data
238 * x x -> recover data blocks
241 ri
= F2FS_INODE(npage
);
243 if (f2fs_has_inline_data(inode
) &&
244 ri
&& (ri
->i_inline
& F2FS_INLINE_DATA
)) {
246 ipage
= get_node_page(sbi
, inode
->i_ino
);
247 f2fs_bug_on(sbi
, IS_ERR(ipage
));
249 f2fs_wait_on_page_writeback(ipage
, NODE
, true);
251 src_addr
= inline_data_addr(npage
);
252 dst_addr
= inline_data_addr(ipage
);
253 memcpy(dst_addr
, src_addr
, MAX_INLINE_DATA
);
255 set_inode_flag(inode
, FI_INLINE_DATA
);
256 set_inode_flag(inode
, FI_DATA_EXIST
);
258 update_inode(inode
, ipage
);
259 f2fs_put_page(ipage
, 1);
263 if (f2fs_has_inline_data(inode
)) {
264 ipage
= get_node_page(sbi
, inode
->i_ino
);
265 f2fs_bug_on(sbi
, IS_ERR(ipage
));
266 if (!truncate_inline_inode(ipage
, 0))
268 f2fs_clear_inline_inode(inode
);
269 update_inode(inode
, ipage
);
270 f2fs_put_page(ipage
, 1);
271 } else if (ri
&& (ri
->i_inline
& F2FS_INLINE_DATA
)) {
272 if (truncate_blocks(inode
, 0, false))
279 struct f2fs_dir_entry
*find_in_inline_dir(struct inode
*dir
,
280 struct fscrypt_name
*fname
, struct page
**res_page
)
282 struct f2fs_sb_info
*sbi
= F2FS_SB(dir
->i_sb
);
283 struct f2fs_inline_dentry
*inline_dentry
;
284 struct qstr name
= FSTR_TO_QSTR(&fname
->disk_name
);
285 struct f2fs_dir_entry
*de
;
286 struct f2fs_dentry_ptr d
;
288 f2fs_hash_t namehash
;
290 ipage
= get_node_page(sbi
, dir
->i_ino
);
294 namehash
= f2fs_dentry_hash(&name
);
296 inline_dentry
= inline_data_addr(ipage
);
298 make_dentry_ptr(NULL
, &d
, (void *)inline_dentry
, 2);
299 de
= find_target_dentry(fname
, namehash
, NULL
, &d
);
304 f2fs_put_page(ipage
, 0);
309 struct f2fs_dir_entry
*f2fs_parent_inline_dir(struct inode
*dir
,
312 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dir
);
314 struct f2fs_dir_entry
*de
;
315 struct f2fs_inline_dentry
*dentry_blk
;
317 ipage
= get_node_page(sbi
, dir
->i_ino
);
321 dentry_blk
= inline_data_addr(ipage
);
322 de
= &dentry_blk
->dentry
[1];
328 int make_empty_inline_dir(struct inode
*inode
, struct inode
*parent
,
331 struct f2fs_inline_dentry
*dentry_blk
;
332 struct f2fs_dentry_ptr d
;
334 dentry_blk
= inline_data_addr(ipage
);
336 make_dentry_ptr(NULL
, &d
, (void *)dentry_blk
, 2);
337 do_make_empty_dir(inode
, parent
, &d
);
339 set_page_dirty(ipage
);
341 /* update i_size to MAX_INLINE_DATA */
342 if (i_size_read(inode
) < MAX_INLINE_DATA
) {
343 f2fs_i_size_write(inode
, MAX_INLINE_DATA
);
344 set_inode_flag(inode
, FI_UPDATE_DIR
);
350 * NOTE: ipage is grabbed by caller, but if any error occurs, we should
351 * release ipage in this function.
353 static int f2fs_move_inline_dirents(struct inode
*dir
, struct page
*ipage
,
354 struct f2fs_inline_dentry
*inline_dentry
)
357 struct dnode_of_data dn
;
358 struct f2fs_dentry_block
*dentry_blk
;
361 page
= f2fs_grab_cache_page(dir
->i_mapping
, 0, false);
363 f2fs_put_page(ipage
, 1);
367 set_new_dnode(&dn
, dir
, ipage
, NULL
, 0);
368 err
= f2fs_reserve_block(&dn
, 0);
372 f2fs_wait_on_page_writeback(page
, DATA
, true);
373 zero_user_segment(page
, MAX_INLINE_DATA
, PAGE_SIZE
);
375 dentry_blk
= kmap_atomic(page
);
377 /* copy data from inline dentry block to new dentry block */
378 memcpy(dentry_blk
->dentry_bitmap
, inline_dentry
->dentry_bitmap
,
379 INLINE_DENTRY_BITMAP_SIZE
);
380 memset(dentry_blk
->dentry_bitmap
+ INLINE_DENTRY_BITMAP_SIZE
, 0,
381 SIZE_OF_DENTRY_BITMAP
- INLINE_DENTRY_BITMAP_SIZE
);
383 * we do not need to zero out remainder part of dentry and filename
384 * field, since we have used bitmap for marking the usage status of
385 * them, besides, we can also ignore copying/zeroing reserved space
386 * of dentry block, because them haven't been used so far.
388 memcpy(dentry_blk
->dentry
, inline_dentry
->dentry
,
389 sizeof(struct f2fs_dir_entry
) * NR_INLINE_DENTRY
);
390 memcpy(dentry_blk
->filename
, inline_dentry
->filename
,
391 NR_INLINE_DENTRY
* F2FS_SLOT_LEN
);
393 kunmap_atomic(dentry_blk
);
394 SetPageUptodate(page
);
395 set_page_dirty(page
);
397 /* clear inline dir and flag after data writeback */
398 truncate_inline_inode(ipage
, 0);
400 stat_dec_inline_dir(dir
);
401 clear_inode_flag(dir
, FI_INLINE_DENTRY
);
403 F2FS_I(dir
)->i_current_depth
= 1;
404 if (i_size_read(dir
) < PAGE_SIZE
) {
405 f2fs_i_size_write(dir
, PAGE_SIZE
);
406 set_inode_flag(dir
, FI_UPDATE_DIR
);
409 sync_inode_page(&dn
);
411 f2fs_put_page(page
, 1);
415 static int f2fs_add_inline_entries(struct inode
*dir
,
416 struct f2fs_inline_dentry
*inline_dentry
)
418 struct f2fs_dentry_ptr d
;
419 unsigned long bit_pos
= 0;
422 make_dentry_ptr(NULL
, &d
, (void *)inline_dentry
, 2);
424 while (bit_pos
< d
.max
) {
425 struct f2fs_dir_entry
*de
;
426 struct qstr new_name
;
430 if (!test_bit_le(bit_pos
, d
.bitmap
)) {
435 de
= &d
.dentry
[bit_pos
];
437 if (unlikely(!de
->name_len
)) {
442 new_name
.name
= d
.filename
[bit_pos
];
443 new_name
.len
= de
->name_len
;
445 ino
= le32_to_cpu(de
->ino
);
446 fake_mode
= get_de_type(de
) << S_SHIFT
;
448 err
= f2fs_add_regular_entry(dir
, &new_name
, NULL
,
451 goto punch_dentry_pages
;
453 bit_pos
+= GET_DENTRY_SLOTS(le16_to_cpu(de
->name_len
));
457 truncate_inode_pages(&dir
->i_data
, 0);
458 truncate_blocks(dir
, 0, false);
459 remove_dirty_inode(dir
);
463 static int f2fs_move_rehashed_dirents(struct inode
*dir
, struct page
*ipage
,
464 struct f2fs_inline_dentry
*inline_dentry
)
466 struct f2fs_inline_dentry
*backup_dentry
;
469 backup_dentry
= f2fs_kmalloc(sizeof(struct f2fs_inline_dentry
),
471 if (!backup_dentry
) {
472 f2fs_put_page(ipage
, 1);
476 memcpy(backup_dentry
, inline_dentry
, MAX_INLINE_DATA
);
477 truncate_inline_inode(ipage
, 0);
481 err
= f2fs_add_inline_entries(dir
, backup_dentry
);
487 stat_dec_inline_dir(dir
);
488 clear_inode_flag(dir
, FI_INLINE_DENTRY
);
489 update_inode(dir
, ipage
);
490 kfree(backup_dentry
);
494 memcpy(inline_dentry
, backup_dentry
, MAX_INLINE_DATA
);
495 F2FS_I(dir
)->i_current_depth
= 0;
496 f2fs_i_size_write(dir
, MAX_INLINE_DATA
);
497 update_inode(dir
, ipage
);
498 f2fs_put_page(ipage
, 1);
500 kfree(backup_dentry
);
504 static int f2fs_convert_inline_dir(struct inode
*dir
, struct page
*ipage
,
505 struct f2fs_inline_dentry
*inline_dentry
)
507 if (!F2FS_I(dir
)->i_dir_level
)
508 return f2fs_move_inline_dirents(dir
, ipage
, inline_dentry
);
510 return f2fs_move_rehashed_dirents(dir
, ipage
, inline_dentry
);
513 int f2fs_add_inline_entry(struct inode
*dir
, const struct qstr
*name
,
514 struct inode
*inode
, nid_t ino
, umode_t mode
)
516 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dir
);
518 unsigned int bit_pos
;
519 f2fs_hash_t name_hash
;
520 size_t namelen
= name
->len
;
521 struct f2fs_inline_dentry
*dentry_blk
= NULL
;
522 struct f2fs_dentry_ptr d
;
523 int slots
= GET_DENTRY_SLOTS(namelen
);
524 struct page
*page
= NULL
;
527 ipage
= get_node_page(sbi
, dir
->i_ino
);
529 return PTR_ERR(ipage
);
531 dentry_blk
= inline_data_addr(ipage
);
532 bit_pos
= room_for_filename(&dentry_blk
->dentry_bitmap
,
533 slots
, NR_INLINE_DENTRY
);
534 if (bit_pos
>= NR_INLINE_DENTRY
) {
535 err
= f2fs_convert_inline_dir(dir
, ipage
, dentry_blk
);
543 down_write(&F2FS_I(inode
)->i_sem
);
544 page
= init_inode_metadata(inode
, dir
, name
, ipage
);
551 f2fs_wait_on_page_writeback(ipage
, NODE
, true);
553 name_hash
= f2fs_dentry_hash(name
);
554 make_dentry_ptr(NULL
, &d
, (void *)dentry_blk
, 2);
555 f2fs_update_dentry(ino
, mode
, &d
, name
, name_hash
, bit_pos
);
557 set_page_dirty(ipage
);
559 /* we don't need to mark_inode_dirty now */
561 F2FS_I(inode
)->i_pino
= dir
->i_ino
;
562 update_inode(inode
, page
);
563 f2fs_put_page(page
, 1);
566 update_parent_metadata(dir
, inode
, 0);
569 up_write(&F2FS_I(inode
)->i_sem
);
571 if (is_inode_flag_set(dir
, FI_UPDATE_DIR
)) {
572 update_inode(dir
, ipage
);
573 clear_inode_flag(dir
, FI_UPDATE_DIR
);
576 f2fs_put_page(ipage
, 1);
580 void f2fs_delete_inline_entry(struct f2fs_dir_entry
*dentry
, struct page
*page
,
581 struct inode
*dir
, struct inode
*inode
)
583 struct f2fs_inline_dentry
*inline_dentry
;
584 int slots
= GET_DENTRY_SLOTS(le16_to_cpu(dentry
->name_len
));
585 unsigned int bit_pos
;
589 f2fs_wait_on_page_writeback(page
, NODE
, true);
591 inline_dentry
= inline_data_addr(page
);
592 bit_pos
= dentry
- inline_dentry
->dentry
;
593 for (i
= 0; i
< slots
; i
++)
594 test_and_clear_bit_le(bit_pos
+ i
,
595 &inline_dentry
->dentry_bitmap
);
597 set_page_dirty(page
);
599 dir
->i_ctime
= dir
->i_mtime
= CURRENT_TIME
;
602 f2fs_drop_nlink(dir
, inode
, page
);
604 f2fs_put_page(page
, 1);
607 bool f2fs_empty_inline_dir(struct inode
*dir
)
609 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dir
);
611 unsigned int bit_pos
= 2;
612 struct f2fs_inline_dentry
*dentry_blk
;
614 ipage
= get_node_page(sbi
, dir
->i_ino
);
618 dentry_blk
= inline_data_addr(ipage
);
619 bit_pos
= find_next_bit_le(&dentry_blk
->dentry_bitmap
,
623 f2fs_put_page(ipage
, 1);
625 if (bit_pos
< NR_INLINE_DENTRY
)
631 int f2fs_read_inline_dir(struct file
*file
, struct dir_context
*ctx
,
632 struct fscrypt_str
*fstr
)
634 struct inode
*inode
= file_inode(file
);
635 struct f2fs_inline_dentry
*inline_dentry
= NULL
;
636 struct page
*ipage
= NULL
;
637 struct f2fs_dentry_ptr d
;
639 if (ctx
->pos
== NR_INLINE_DENTRY
)
642 ipage
= get_node_page(F2FS_I_SB(inode
), inode
->i_ino
);
644 return PTR_ERR(ipage
);
646 inline_dentry
= inline_data_addr(ipage
);
648 make_dentry_ptr(inode
, &d
, (void *)inline_dentry
, 2);
650 if (!f2fs_fill_dentries(ctx
, &d
, 0, fstr
))
651 ctx
->pos
= NR_INLINE_DENTRY
;
653 f2fs_put_page(ipage
, 1);
657 int f2fs_inline_data_fiemap(struct inode
*inode
,
658 struct fiemap_extent_info
*fieinfo
, __u64 start
, __u64 len
)
660 __u64 byteaddr
, ilen
;
661 __u32 flags
= FIEMAP_EXTENT_DATA_INLINE
| FIEMAP_EXTENT_NOT_ALIGNED
|
667 ipage
= get_node_page(F2FS_I_SB(inode
), inode
->i_ino
);
669 return PTR_ERR(ipage
);
671 if (!f2fs_has_inline_data(inode
)) {
676 ilen
= min_t(size_t, MAX_INLINE_DATA
, i_size_read(inode
));
679 if (start
+ len
< ilen
)
683 get_node_info(F2FS_I_SB(inode
), inode
->i_ino
, &ni
);
684 byteaddr
= (__u64
)ni
.blk_addr
<< inode
->i_sb
->s_blocksize_bits
;
685 byteaddr
+= (char *)inline_data_addr(ipage
) - (char *)F2FS_INODE(ipage
);
686 err
= fiemap_fill_next_extent(fieinfo
, start
, byteaddr
, ilen
, flags
);
688 f2fs_put_page(ipage
, 1);