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 if (!PageUptodate(page
))
63 SetPageUptodate(page
);
66 bool truncate_inline_inode(struct page
*ipage
, u64 from
)
70 if (from
>= MAX_INLINE_DATA
)
73 addr
= inline_data_addr(ipage
);
75 f2fs_wait_on_page_writeback(ipage
, NODE
, true);
76 memset(addr
+ from
, 0, MAX_INLINE_DATA
- from
);
77 set_page_dirty(ipage
);
81 int f2fs_read_inline_data(struct inode
*inode
, struct page
*page
)
85 ipage
= get_node_page(F2FS_I_SB(inode
), inode
->i_ino
);
88 return PTR_ERR(ipage
);
91 if (!f2fs_has_inline_data(inode
)) {
92 f2fs_put_page(ipage
, 1);
97 zero_user_segment(page
, 0, PAGE_SIZE
);
99 read_inline_data(page
, ipage
);
101 if (!PageUptodate(page
))
102 SetPageUptodate(page
);
103 f2fs_put_page(ipage
, 1);
108 int f2fs_convert_inline_page(struct dnode_of_data
*dn
, struct page
*page
)
110 struct f2fs_io_info fio
= {
111 .sbi
= F2FS_I_SB(dn
->inode
),
113 .rw
= WRITE_SYNC
| REQ_PRIO
,
115 .encrypted_page
= NULL
,
119 if (!f2fs_exist_data(dn
->inode
))
122 err
= f2fs_reserve_block(dn
, 0);
126 f2fs_bug_on(F2FS_P_SB(page
), PageWriteback(page
));
128 read_inline_data(page
, dn
->inode_page
);
129 set_page_dirty(page
);
131 /* clear dirty state */
132 dirty
= clear_page_dirty_for_io(page
);
134 /* write data page to try to make data consistent */
135 set_page_writeback(page
);
136 fio
.old_blkaddr
= dn
->data_blkaddr
;
137 write_data_page(dn
, &fio
);
138 f2fs_wait_on_page_writeback(page
, DATA
, true);
140 inode_dec_dirty_pages(dn
->inode
);
142 /* this converted inline_data should be recovered. */
143 set_inode_flag(dn
->inode
, FI_APPEND_WRITE
);
145 /* clear inline data and flag after data writeback */
146 truncate_inline_inode(dn
->inode_page
, 0);
147 clear_inline_node(dn
->inode_page
);
149 stat_dec_inline_inode(dn
->inode
);
150 f2fs_clear_inline_inode(dn
->inode
);
155 int f2fs_convert_inline_inode(struct inode
*inode
)
157 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
158 struct dnode_of_data dn
;
159 struct page
*ipage
, *page
;
162 if (!f2fs_has_inline_data(inode
))
165 page
= f2fs_grab_cache_page(inode
->i_mapping
, 0, false);
171 ipage
= get_node_page(sbi
, inode
->i_ino
);
173 err
= PTR_ERR(ipage
);
177 set_new_dnode(&dn
, inode
, ipage
, ipage
, 0);
179 if (f2fs_has_inline_data(inode
))
180 err
= f2fs_convert_inline_page(&dn
, page
);
186 f2fs_put_page(page
, 1);
188 f2fs_balance_fs(sbi
, dn
.node_changed
);
193 int f2fs_write_inline_data(struct inode
*inode
, struct page
*page
)
195 void *src_addr
, *dst_addr
;
196 struct dnode_of_data dn
;
199 set_new_dnode(&dn
, inode
, NULL
, NULL
, 0);
200 err
= get_dnode_of_data(&dn
, 0, LOOKUP_NODE
);
204 if (!f2fs_has_inline_data(inode
)) {
209 f2fs_bug_on(F2FS_I_SB(inode
), page
->index
);
211 f2fs_wait_on_page_writeback(dn
.inode_page
, NODE
, true);
212 src_addr
= kmap_atomic(page
);
213 dst_addr
= inline_data_addr(dn
.inode_page
);
214 memcpy(dst_addr
, src_addr
, MAX_INLINE_DATA
);
215 kunmap_atomic(src_addr
);
216 set_page_dirty(dn
.inode_page
);
218 set_inode_flag(inode
, FI_APPEND_WRITE
);
219 set_inode_flag(inode
, FI_DATA_EXIST
);
221 clear_inline_node(dn
.inode_page
);
226 bool recover_inline_data(struct inode
*inode
, struct page
*npage
)
228 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
229 struct f2fs_inode
*ri
= NULL
;
230 void *src_addr
, *dst_addr
;
234 * The inline_data recovery policy is as follows.
235 * [prev.] [next] of inline_data flag
236 * o o -> recover inline_data
237 * o x -> remove inline_data, and then recover data blocks
238 * x o -> remove inline_data, and then recover inline_data
239 * x x -> recover data blocks
242 ri
= F2FS_INODE(npage
);
244 if (f2fs_has_inline_data(inode
) &&
245 ri
&& (ri
->i_inline
& F2FS_INLINE_DATA
)) {
247 ipage
= get_node_page(sbi
, inode
->i_ino
);
248 f2fs_bug_on(sbi
, IS_ERR(ipage
));
250 f2fs_wait_on_page_writeback(ipage
, NODE
, true);
252 src_addr
= inline_data_addr(npage
);
253 dst_addr
= inline_data_addr(ipage
);
254 memcpy(dst_addr
, src_addr
, MAX_INLINE_DATA
);
256 set_inode_flag(inode
, FI_INLINE_DATA
);
257 set_inode_flag(inode
, FI_DATA_EXIST
);
259 set_page_dirty(ipage
);
260 f2fs_put_page(ipage
, 1);
264 if (f2fs_has_inline_data(inode
)) {
265 ipage
= get_node_page(sbi
, inode
->i_ino
);
266 f2fs_bug_on(sbi
, IS_ERR(ipage
));
267 if (!truncate_inline_inode(ipage
, 0))
269 f2fs_clear_inline_inode(inode
);
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
);
296 namehash
= f2fs_dentry_hash(&name
);
298 inline_dentry
= inline_data_addr(ipage
);
300 make_dentry_ptr(NULL
, &d
, (void *)inline_dentry
, 2);
301 de
= find_target_dentry(fname
, namehash
, NULL
, &d
);
306 f2fs_put_page(ipage
, 0);
311 int make_empty_inline_dir(struct inode
*inode
, struct inode
*parent
,
314 struct f2fs_inline_dentry
*dentry_blk
;
315 struct f2fs_dentry_ptr d
;
317 dentry_blk
= inline_data_addr(ipage
);
319 make_dentry_ptr(NULL
, &d
, (void *)dentry_blk
, 2);
320 do_make_empty_dir(inode
, parent
, &d
);
322 set_page_dirty(ipage
);
324 /* update i_size to MAX_INLINE_DATA */
325 if (i_size_read(inode
) < MAX_INLINE_DATA
)
326 f2fs_i_size_write(inode
, MAX_INLINE_DATA
);
331 * NOTE: ipage is grabbed by caller, but if any error occurs, we should
332 * release ipage in this function.
334 static int f2fs_move_inline_dirents(struct inode
*dir
, struct page
*ipage
,
335 struct f2fs_inline_dentry
*inline_dentry
)
338 struct dnode_of_data dn
;
339 struct f2fs_dentry_block
*dentry_blk
;
342 page
= f2fs_grab_cache_page(dir
->i_mapping
, 0, false);
344 f2fs_put_page(ipage
, 1);
348 set_new_dnode(&dn
, dir
, ipage
, NULL
, 0);
349 err
= f2fs_reserve_block(&dn
, 0);
353 f2fs_wait_on_page_writeback(page
, DATA
, true);
354 zero_user_segment(page
, MAX_INLINE_DATA
, PAGE_SIZE
);
356 dentry_blk
= kmap_atomic(page
);
358 /* copy data from inline dentry block to new dentry block */
359 memcpy(dentry_blk
->dentry_bitmap
, inline_dentry
->dentry_bitmap
,
360 INLINE_DENTRY_BITMAP_SIZE
);
361 memset(dentry_blk
->dentry_bitmap
+ INLINE_DENTRY_BITMAP_SIZE
, 0,
362 SIZE_OF_DENTRY_BITMAP
- INLINE_DENTRY_BITMAP_SIZE
);
364 * we do not need to zero out remainder part of dentry and filename
365 * field, since we have used bitmap for marking the usage status of
366 * them, besides, we can also ignore copying/zeroing reserved space
367 * of dentry block, because them haven't been used so far.
369 memcpy(dentry_blk
->dentry
, inline_dentry
->dentry
,
370 sizeof(struct f2fs_dir_entry
) * NR_INLINE_DENTRY
);
371 memcpy(dentry_blk
->filename
, inline_dentry
->filename
,
372 NR_INLINE_DENTRY
* F2FS_SLOT_LEN
);
374 kunmap_atomic(dentry_blk
);
375 if (!PageUptodate(page
))
376 SetPageUptodate(page
);
377 set_page_dirty(page
);
379 /* clear inline dir and flag after data writeback */
380 truncate_inline_inode(ipage
, 0);
382 stat_dec_inline_dir(dir
);
383 clear_inode_flag(dir
, FI_INLINE_DENTRY
);
385 f2fs_i_depth_write(dir
, 1);
386 if (i_size_read(dir
) < PAGE_SIZE
)
387 f2fs_i_size_write(dir
, PAGE_SIZE
);
389 f2fs_put_page(page
, 1);
393 static int f2fs_add_inline_entries(struct inode
*dir
,
394 struct f2fs_inline_dentry
*inline_dentry
)
396 struct f2fs_dentry_ptr d
;
397 unsigned long bit_pos
= 0;
400 make_dentry_ptr(NULL
, &d
, (void *)inline_dentry
, 2);
402 while (bit_pos
< d
.max
) {
403 struct f2fs_dir_entry
*de
;
404 struct qstr new_name
;
408 if (!test_bit_le(bit_pos
, d
.bitmap
)) {
413 de
= &d
.dentry
[bit_pos
];
415 if (unlikely(!de
->name_len
)) {
420 new_name
.name
= d
.filename
[bit_pos
];
421 new_name
.len
= de
->name_len
;
423 ino
= le32_to_cpu(de
->ino
);
424 fake_mode
= get_de_type(de
) << S_SHIFT
;
426 err
= f2fs_add_regular_entry(dir
, &new_name
, NULL
,
429 goto punch_dentry_pages
;
431 bit_pos
+= GET_DENTRY_SLOTS(le16_to_cpu(de
->name_len
));
435 truncate_inode_pages(&dir
->i_data
, 0);
436 truncate_blocks(dir
, 0, false);
437 remove_dirty_inode(dir
);
441 static int f2fs_move_rehashed_dirents(struct inode
*dir
, struct page
*ipage
,
442 struct f2fs_inline_dentry
*inline_dentry
)
444 struct f2fs_inline_dentry
*backup_dentry
;
447 backup_dentry
= f2fs_kmalloc(sizeof(struct f2fs_inline_dentry
),
449 if (!backup_dentry
) {
450 f2fs_put_page(ipage
, 1);
454 memcpy(backup_dentry
, inline_dentry
, MAX_INLINE_DATA
);
455 truncate_inline_inode(ipage
, 0);
459 err
= f2fs_add_inline_entries(dir
, backup_dentry
);
465 stat_dec_inline_dir(dir
);
466 clear_inode_flag(dir
, FI_INLINE_DENTRY
);
467 kfree(backup_dentry
);
471 memcpy(inline_dentry
, backup_dentry
, MAX_INLINE_DATA
);
472 f2fs_i_depth_write(dir
, 0);
473 f2fs_i_size_write(dir
, MAX_INLINE_DATA
);
474 set_page_dirty(ipage
);
475 f2fs_put_page(ipage
, 1);
477 kfree(backup_dentry
);
481 static int f2fs_convert_inline_dir(struct inode
*dir
, struct page
*ipage
,
482 struct f2fs_inline_dentry
*inline_dentry
)
484 if (!F2FS_I(dir
)->i_dir_level
)
485 return f2fs_move_inline_dirents(dir
, ipage
, inline_dentry
);
487 return f2fs_move_rehashed_dirents(dir
, ipage
, inline_dentry
);
490 int f2fs_add_inline_entry(struct inode
*dir
, const struct qstr
*name
,
491 struct inode
*inode
, nid_t ino
, umode_t mode
)
493 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dir
);
495 unsigned int bit_pos
;
496 f2fs_hash_t name_hash
;
497 size_t namelen
= name
->len
;
498 struct f2fs_inline_dentry
*dentry_blk
= NULL
;
499 struct f2fs_dentry_ptr d
;
500 int slots
= GET_DENTRY_SLOTS(namelen
);
501 struct page
*page
= NULL
;
504 ipage
= get_node_page(sbi
, dir
->i_ino
);
506 return PTR_ERR(ipage
);
508 dentry_blk
= inline_data_addr(ipage
);
509 bit_pos
= room_for_filename(&dentry_blk
->dentry_bitmap
,
510 slots
, NR_INLINE_DENTRY
);
511 if (bit_pos
>= NR_INLINE_DENTRY
) {
512 err
= f2fs_convert_inline_dir(dir
, ipage
, dentry_blk
);
520 down_write(&F2FS_I(inode
)->i_sem
);
521 page
= init_inode_metadata(inode
, dir
, name
, ipage
);
528 f2fs_wait_on_page_writeback(ipage
, NODE
, true);
530 name_hash
= f2fs_dentry_hash(name
);
531 make_dentry_ptr(NULL
, &d
, (void *)dentry_blk
, 2);
532 f2fs_update_dentry(ino
, mode
, &d
, name
, name_hash
, bit_pos
);
534 set_page_dirty(ipage
);
536 /* we don't need to mark_inode_dirty now */
538 f2fs_i_pino_write(inode
, dir
->i_ino
);
539 f2fs_put_page(page
, 1);
542 update_parent_metadata(dir
, inode
, 0);
545 up_write(&F2FS_I(inode
)->i_sem
);
547 f2fs_put_page(ipage
, 1);
551 void f2fs_delete_inline_entry(struct f2fs_dir_entry
*dentry
, struct page
*page
,
552 struct inode
*dir
, struct inode
*inode
)
554 struct f2fs_inline_dentry
*inline_dentry
;
555 int slots
= GET_DENTRY_SLOTS(le16_to_cpu(dentry
->name_len
));
556 unsigned int bit_pos
;
560 f2fs_wait_on_page_writeback(page
, NODE
, true);
562 inline_dentry
= inline_data_addr(page
);
563 bit_pos
= dentry
- inline_dentry
->dentry
;
564 for (i
= 0; i
< slots
; i
++)
565 test_and_clear_bit_le(bit_pos
+ i
,
566 &inline_dentry
->dentry_bitmap
);
568 set_page_dirty(page
);
569 f2fs_put_page(page
, 1);
571 dir
->i_ctime
= dir
->i_mtime
= CURRENT_TIME
;
572 mark_inode_dirty_sync(dir
);
575 f2fs_drop_nlink(dir
, inode
);
578 bool f2fs_empty_inline_dir(struct inode
*dir
)
580 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dir
);
582 unsigned int bit_pos
= 2;
583 struct f2fs_inline_dentry
*dentry_blk
;
585 ipage
= get_node_page(sbi
, dir
->i_ino
);
589 dentry_blk
= inline_data_addr(ipage
);
590 bit_pos
= find_next_bit_le(&dentry_blk
->dentry_bitmap
,
594 f2fs_put_page(ipage
, 1);
596 if (bit_pos
< NR_INLINE_DENTRY
)
602 int f2fs_read_inline_dir(struct file
*file
, struct dir_context
*ctx
,
603 struct fscrypt_str
*fstr
)
605 struct inode
*inode
= file_inode(file
);
606 struct f2fs_inline_dentry
*inline_dentry
= NULL
;
607 struct page
*ipage
= NULL
;
608 struct f2fs_dentry_ptr d
;
610 if (ctx
->pos
== NR_INLINE_DENTRY
)
613 ipage
= get_node_page(F2FS_I_SB(inode
), inode
->i_ino
);
615 return PTR_ERR(ipage
);
617 inline_dentry
= inline_data_addr(ipage
);
619 make_dentry_ptr(inode
, &d
, (void *)inline_dentry
, 2);
621 if (!f2fs_fill_dentries(ctx
, &d
, 0, fstr
))
622 ctx
->pos
= NR_INLINE_DENTRY
;
624 f2fs_put_page(ipage
, 1);
628 int f2fs_inline_data_fiemap(struct inode
*inode
,
629 struct fiemap_extent_info
*fieinfo
, __u64 start
, __u64 len
)
631 __u64 byteaddr
, ilen
;
632 __u32 flags
= FIEMAP_EXTENT_DATA_INLINE
| FIEMAP_EXTENT_NOT_ALIGNED
|
638 ipage
= get_node_page(F2FS_I_SB(inode
), inode
->i_ino
);
640 return PTR_ERR(ipage
);
642 if (!f2fs_has_inline_data(inode
)) {
647 ilen
= min_t(size_t, MAX_INLINE_DATA
, i_size_read(inode
));
650 if (start
+ len
< ilen
)
654 get_node_info(F2FS_I_SB(inode
), inode
->i_ino
, &ni
);
655 byteaddr
= (__u64
)ni
.blk_addr
<< inode
->i_sb
->s_blocksize_bits
;
656 byteaddr
+= (char *)inline_data_addr(ipage
) - (char *)F2FS_INODE(ipage
);
657 err
= fiemap_fill_next_extent(fieinfo
, start
, byteaddr
, ilen
, flags
);
659 f2fs_put_page(ipage
, 1);