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 void truncate_inline_inode(struct inode
*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
);
80 clear_inode_flag(inode
, FI_DATA_EXIST
);
83 int f2fs_read_inline_data(struct inode
*inode
, struct page
*page
)
87 ipage
= get_node_page(F2FS_I_SB(inode
), inode
->i_ino
);
90 return PTR_ERR(ipage
);
93 if (!f2fs_has_inline_data(inode
)) {
94 f2fs_put_page(ipage
, 1);
99 zero_user_segment(page
, 0, PAGE_SIZE
);
101 read_inline_data(page
, ipage
);
103 if (!PageUptodate(page
))
104 SetPageUptodate(page
);
105 f2fs_put_page(ipage
, 1);
110 int f2fs_convert_inline_page(struct dnode_of_data
*dn
, struct page
*page
)
112 struct f2fs_io_info fio
= {
113 .sbi
= F2FS_I_SB(dn
->inode
),
116 .op_flags
= REQ_SYNC
| REQ_PRIO
,
118 .encrypted_page
= NULL
,
122 if (!f2fs_exist_data(dn
->inode
))
125 err
= f2fs_reserve_block(dn
, 0);
129 f2fs_bug_on(F2FS_P_SB(page
), PageWriteback(page
));
131 read_inline_data(page
, dn
->inode_page
);
132 set_page_dirty(page
);
134 /* clear dirty state */
135 dirty
= clear_page_dirty_for_io(page
);
137 /* write data page to try to make data consistent */
138 set_page_writeback(page
);
139 fio
.old_blkaddr
= dn
->data_blkaddr
;
140 set_inode_flag(dn
->inode
, FI_HOT_DATA
);
141 write_data_page(dn
, &fio
);
142 f2fs_wait_on_page_writeback(page
, DATA
, true);
144 inode_dec_dirty_pages(dn
->inode
);
145 remove_dirty_inode(dn
->inode
);
148 /* this converted inline_data should be recovered. */
149 set_inode_flag(dn
->inode
, FI_APPEND_WRITE
);
151 /* clear inline data and flag after data writeback */
152 truncate_inline_inode(dn
->inode
, dn
->inode_page
, 0);
153 clear_inline_node(dn
->inode_page
);
155 stat_dec_inline_inode(dn
->inode
);
156 clear_inode_flag(dn
->inode
, FI_INLINE_DATA
);
161 int f2fs_convert_inline_inode(struct inode
*inode
)
163 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
164 struct dnode_of_data dn
;
165 struct page
*ipage
, *page
;
168 if (!f2fs_has_inline_data(inode
))
171 page
= f2fs_grab_cache_page(inode
->i_mapping
, 0, false);
177 ipage
= get_node_page(sbi
, inode
->i_ino
);
179 err
= PTR_ERR(ipage
);
183 set_new_dnode(&dn
, inode
, ipage
, ipage
, 0);
185 if (f2fs_has_inline_data(inode
))
186 err
= f2fs_convert_inline_page(&dn
, page
);
192 f2fs_put_page(page
, 1);
194 f2fs_balance_fs(sbi
, dn
.node_changed
);
199 int f2fs_write_inline_data(struct inode
*inode
, struct page
*page
)
201 void *src_addr
, *dst_addr
;
202 struct dnode_of_data dn
;
205 set_new_dnode(&dn
, inode
, NULL
, NULL
, 0);
206 err
= get_dnode_of_data(&dn
, 0, LOOKUP_NODE
);
210 if (!f2fs_has_inline_data(inode
)) {
215 f2fs_bug_on(F2FS_I_SB(inode
), page
->index
);
217 f2fs_wait_on_page_writeback(dn
.inode_page
, NODE
, true);
218 src_addr
= kmap_atomic(page
);
219 dst_addr
= inline_data_addr(dn
.inode_page
);
220 memcpy(dst_addr
, src_addr
, MAX_INLINE_DATA
);
221 kunmap_atomic(src_addr
);
222 set_page_dirty(dn
.inode_page
);
224 set_inode_flag(inode
, FI_APPEND_WRITE
);
225 set_inode_flag(inode
, FI_DATA_EXIST
);
227 clear_inline_node(dn
.inode_page
);
232 bool recover_inline_data(struct inode
*inode
, struct page
*npage
)
234 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
235 struct f2fs_inode
*ri
= NULL
;
236 void *src_addr
, *dst_addr
;
240 * The inline_data recovery policy is as follows.
241 * [prev.] [next] of inline_data flag
242 * o o -> recover inline_data
243 * o x -> remove inline_data, and then recover data blocks
244 * x o -> remove inline_data, and then recover inline_data
245 * x x -> recover data blocks
248 ri
= F2FS_INODE(npage
);
250 if (f2fs_has_inline_data(inode
) &&
251 ri
&& (ri
->i_inline
& F2FS_INLINE_DATA
)) {
253 ipage
= get_node_page(sbi
, inode
->i_ino
);
254 f2fs_bug_on(sbi
, IS_ERR(ipage
));
256 f2fs_wait_on_page_writeback(ipage
, NODE
, true);
258 src_addr
= inline_data_addr(npage
);
259 dst_addr
= inline_data_addr(ipage
);
260 memcpy(dst_addr
, src_addr
, MAX_INLINE_DATA
);
262 set_inode_flag(inode
, FI_INLINE_DATA
);
263 set_inode_flag(inode
, FI_DATA_EXIST
);
265 set_page_dirty(ipage
);
266 f2fs_put_page(ipage
, 1);
270 if (f2fs_has_inline_data(inode
)) {
271 ipage
= get_node_page(sbi
, inode
->i_ino
);
272 f2fs_bug_on(sbi
, IS_ERR(ipage
));
273 truncate_inline_inode(inode
, ipage
, 0);
274 clear_inode_flag(inode
, FI_INLINE_DATA
);
275 f2fs_put_page(ipage
, 1);
276 } else if (ri
&& (ri
->i_inline
& F2FS_INLINE_DATA
)) {
277 if (truncate_blocks(inode
, 0, false))
284 struct f2fs_dir_entry
*find_in_inline_dir(struct inode
*dir
,
285 struct fscrypt_name
*fname
, struct page
**res_page
)
287 struct f2fs_sb_info
*sbi
= F2FS_SB(dir
->i_sb
);
288 struct f2fs_inline_dentry
*inline_dentry
;
289 struct qstr name
= FSTR_TO_QSTR(&fname
->disk_name
);
290 struct f2fs_dir_entry
*de
;
291 struct f2fs_dentry_ptr d
;
293 f2fs_hash_t namehash
;
295 ipage
= get_node_page(sbi
, dir
->i_ino
);
301 namehash
= f2fs_dentry_hash(&name
, fname
);
303 inline_dentry
= inline_data_addr(ipage
);
305 make_dentry_ptr_inline(NULL
, &d
, inline_dentry
);
306 de
= find_target_dentry(fname
, namehash
, NULL
, &d
);
311 f2fs_put_page(ipage
, 0);
316 int make_empty_inline_dir(struct inode
*inode
, struct inode
*parent
,
319 struct f2fs_inline_dentry
*inline_dentry
;
320 struct f2fs_dentry_ptr d
;
322 inline_dentry
= inline_data_addr(ipage
);
324 make_dentry_ptr_inline(NULL
, &d
, inline_dentry
);
325 do_make_empty_dir(inode
, parent
, &d
);
327 set_page_dirty(ipage
);
329 /* update i_size to MAX_INLINE_DATA */
330 if (i_size_read(inode
) < MAX_INLINE_DATA
)
331 f2fs_i_size_write(inode
, MAX_INLINE_DATA
);
336 * NOTE: ipage is grabbed by caller, but if any error occurs, we should
337 * release ipage in this function.
339 static int f2fs_move_inline_dirents(struct inode
*dir
, struct page
*ipage
,
340 struct f2fs_inline_dentry
*inline_dentry
)
343 struct dnode_of_data dn
;
344 struct f2fs_dentry_block
*dentry_blk
;
347 page
= f2fs_grab_cache_page(dir
->i_mapping
, 0, false);
349 f2fs_put_page(ipage
, 1);
353 set_new_dnode(&dn
, dir
, ipage
, NULL
, 0);
354 err
= f2fs_reserve_block(&dn
, 0);
358 f2fs_wait_on_page_writeback(page
, DATA
, true);
359 zero_user_segment(page
, MAX_INLINE_DATA
, PAGE_SIZE
);
361 dentry_blk
= kmap_atomic(page
);
363 /* copy data from inline dentry block to new dentry block */
364 memcpy(dentry_blk
->dentry_bitmap
, inline_dentry
->dentry_bitmap
,
365 INLINE_DENTRY_BITMAP_SIZE
);
366 memset(dentry_blk
->dentry_bitmap
+ INLINE_DENTRY_BITMAP_SIZE
, 0,
367 SIZE_OF_DENTRY_BITMAP
- INLINE_DENTRY_BITMAP_SIZE
);
369 * we do not need to zero out remainder part of dentry and filename
370 * field, since we have used bitmap for marking the usage status of
371 * them, besides, we can also ignore copying/zeroing reserved space
372 * of dentry block, because them haven't been used so far.
374 memcpy(dentry_blk
->dentry
, inline_dentry
->dentry
,
375 sizeof(struct f2fs_dir_entry
) * NR_INLINE_DENTRY
);
376 memcpy(dentry_blk
->filename
, inline_dentry
->filename
,
377 NR_INLINE_DENTRY
* F2FS_SLOT_LEN
);
379 kunmap_atomic(dentry_blk
);
380 if (!PageUptodate(page
))
381 SetPageUptodate(page
);
382 set_page_dirty(page
);
384 /* clear inline dir and flag after data writeback */
385 truncate_inline_inode(dir
, ipage
, 0);
387 stat_dec_inline_dir(dir
);
388 clear_inode_flag(dir
, FI_INLINE_DENTRY
);
390 f2fs_i_depth_write(dir
, 1);
391 if (i_size_read(dir
) < PAGE_SIZE
)
392 f2fs_i_size_write(dir
, PAGE_SIZE
);
394 f2fs_put_page(page
, 1);
398 static int f2fs_add_inline_entries(struct inode
*dir
,
399 struct f2fs_inline_dentry
*inline_dentry
)
401 struct f2fs_dentry_ptr d
;
402 unsigned long bit_pos
= 0;
405 make_dentry_ptr_inline(NULL
, &d
, inline_dentry
);
407 while (bit_pos
< d
.max
) {
408 struct f2fs_dir_entry
*de
;
409 struct qstr new_name
;
413 if (!test_bit_le(bit_pos
, d
.bitmap
)) {
418 de
= &d
.dentry
[bit_pos
];
420 if (unlikely(!de
->name_len
)) {
425 new_name
.name
= d
.filename
[bit_pos
];
426 new_name
.len
= le16_to_cpu(de
->name_len
);
428 ino
= le32_to_cpu(de
->ino
);
429 fake_mode
= get_de_type(de
) << S_SHIFT
;
431 err
= f2fs_add_regular_entry(dir
, &new_name
, NULL
, NULL
,
434 goto punch_dentry_pages
;
436 bit_pos
+= GET_DENTRY_SLOTS(le16_to_cpu(de
->name_len
));
440 truncate_inode_pages(&dir
->i_data
, 0);
441 truncate_blocks(dir
, 0, false);
442 remove_dirty_inode(dir
);
446 static int f2fs_move_rehashed_dirents(struct inode
*dir
, struct page
*ipage
,
447 struct f2fs_inline_dentry
*inline_dentry
)
449 struct f2fs_inline_dentry
*backup_dentry
;
452 backup_dentry
= f2fs_kmalloc(F2FS_I_SB(dir
),
453 sizeof(struct f2fs_inline_dentry
), GFP_F2FS_ZERO
);
454 if (!backup_dentry
) {
455 f2fs_put_page(ipage
, 1);
459 memcpy(backup_dentry
, inline_dentry
, MAX_INLINE_DATA
);
460 truncate_inline_inode(dir
, ipage
, 0);
464 err
= f2fs_add_inline_entries(dir
, backup_dentry
);
470 stat_dec_inline_dir(dir
);
471 clear_inode_flag(dir
, FI_INLINE_DENTRY
);
472 kfree(backup_dentry
);
476 memcpy(inline_dentry
, backup_dentry
, MAX_INLINE_DATA
);
477 f2fs_i_depth_write(dir
, 0);
478 f2fs_i_size_write(dir
, MAX_INLINE_DATA
);
479 set_page_dirty(ipage
);
480 f2fs_put_page(ipage
, 1);
482 kfree(backup_dentry
);
486 static int f2fs_convert_inline_dir(struct inode
*dir
, struct page
*ipage
,
487 struct f2fs_inline_dentry
*inline_dentry
)
489 if (!F2FS_I(dir
)->i_dir_level
)
490 return f2fs_move_inline_dirents(dir
, ipage
, inline_dentry
);
492 return f2fs_move_rehashed_dirents(dir
, ipage
, inline_dentry
);
495 int f2fs_add_inline_entry(struct inode
*dir
, const struct qstr
*new_name
,
496 const struct qstr
*orig_name
,
497 struct inode
*inode
, nid_t ino
, umode_t mode
)
499 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dir
);
501 unsigned int bit_pos
;
502 f2fs_hash_t name_hash
;
503 struct f2fs_inline_dentry
*inline_dentry
= NULL
;
504 struct f2fs_dentry_ptr d
;
505 int slots
= GET_DENTRY_SLOTS(new_name
->len
);
506 struct page
*page
= NULL
;
509 ipage
= get_node_page(sbi
, dir
->i_ino
);
511 return PTR_ERR(ipage
);
513 inline_dentry
= inline_data_addr(ipage
);
514 bit_pos
= room_for_filename(&inline_dentry
->dentry_bitmap
,
515 slots
, NR_INLINE_DENTRY
);
516 if (bit_pos
>= NR_INLINE_DENTRY
) {
517 err
= f2fs_convert_inline_dir(dir
, ipage
, inline_dentry
);
525 down_write(&F2FS_I(inode
)->i_sem
);
526 page
= init_inode_metadata(inode
, dir
, new_name
,
534 f2fs_wait_on_page_writeback(ipage
, NODE
, true);
536 name_hash
= f2fs_dentry_hash(new_name
, NULL
);
537 make_dentry_ptr_inline(NULL
, &d
, inline_dentry
);
538 f2fs_update_dentry(ino
, mode
, &d
, new_name
, name_hash
, bit_pos
);
540 set_page_dirty(ipage
);
542 /* we don't need to mark_inode_dirty now */
544 f2fs_i_pino_write(inode
, dir
->i_ino
);
545 f2fs_put_page(page
, 1);
548 update_parent_metadata(dir
, inode
, 0);
551 up_write(&F2FS_I(inode
)->i_sem
);
553 f2fs_put_page(ipage
, 1);
557 void f2fs_delete_inline_entry(struct f2fs_dir_entry
*dentry
, struct page
*page
,
558 struct inode
*dir
, struct inode
*inode
)
560 struct f2fs_inline_dentry
*inline_dentry
;
561 int slots
= GET_DENTRY_SLOTS(le16_to_cpu(dentry
->name_len
));
562 unsigned int bit_pos
;
566 f2fs_wait_on_page_writeback(page
, NODE
, true);
568 inline_dentry
= inline_data_addr(page
);
569 bit_pos
= dentry
- inline_dentry
->dentry
;
570 for (i
= 0; i
< slots
; i
++)
571 __clear_bit_le(bit_pos
+ i
,
572 &inline_dentry
->dentry_bitmap
);
574 set_page_dirty(page
);
575 f2fs_put_page(page
, 1);
577 dir
->i_ctime
= dir
->i_mtime
= current_time(dir
);
578 f2fs_mark_inode_dirty_sync(dir
, false);
581 f2fs_drop_nlink(dir
, inode
);
584 bool f2fs_empty_inline_dir(struct inode
*dir
)
586 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dir
);
588 unsigned int bit_pos
= 2;
589 struct f2fs_inline_dentry
*inline_dentry
;
591 ipage
= get_node_page(sbi
, dir
->i_ino
);
595 inline_dentry
= inline_data_addr(ipage
);
596 bit_pos
= find_next_bit_le(&inline_dentry
->dentry_bitmap
,
600 f2fs_put_page(ipage
, 1);
602 if (bit_pos
< NR_INLINE_DENTRY
)
608 int f2fs_read_inline_dir(struct file
*file
, struct dir_context
*ctx
,
609 struct fscrypt_str
*fstr
)
611 struct inode
*inode
= file_inode(file
);
612 struct f2fs_inline_dentry
*inline_dentry
= NULL
;
613 struct page
*ipage
= NULL
;
614 struct f2fs_dentry_ptr d
;
617 if (ctx
->pos
== NR_INLINE_DENTRY
)
620 ipage
= get_node_page(F2FS_I_SB(inode
), inode
->i_ino
);
622 return PTR_ERR(ipage
);
624 inline_dentry
= inline_data_addr(ipage
);
626 make_dentry_ptr_inline(inode
, &d
, inline_dentry
);
628 err
= f2fs_fill_dentries(ctx
, &d
, 0, fstr
);
630 ctx
->pos
= NR_INLINE_DENTRY
;
632 f2fs_put_page(ipage
, 1);
633 return err
< 0 ? err
: 0;
636 int f2fs_inline_data_fiemap(struct inode
*inode
,
637 struct fiemap_extent_info
*fieinfo
, __u64 start
, __u64 len
)
639 __u64 byteaddr
, ilen
;
640 __u32 flags
= FIEMAP_EXTENT_DATA_INLINE
| FIEMAP_EXTENT_NOT_ALIGNED
|
646 ipage
= get_node_page(F2FS_I_SB(inode
), inode
->i_ino
);
648 return PTR_ERR(ipage
);
650 if (!f2fs_has_inline_data(inode
)) {
655 ilen
= min_t(size_t, MAX_INLINE_DATA
, i_size_read(inode
));
658 if (start
+ len
< ilen
)
662 get_node_info(F2FS_I_SB(inode
), inode
->i_ino
, &ni
);
663 byteaddr
= (__u64
)ni
.blk_addr
<< inode
->i_sb
->s_blocksize_bits
;
664 byteaddr
+= (char *)inline_data_addr(ipage
) - (char *)F2FS_INODE(ipage
);
665 err
= fiemap_fill_next_extent(fieinfo
, start
, byteaddr
, ilen
, flags
);
667 f2fs_put_page(ipage
, 1);