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>
16 bool f2fs_may_inline_data(struct inode
*inode
)
18 if (!test_opt(F2FS_I_SB(inode
), INLINE_DATA
))
21 if (f2fs_is_atomic_file(inode
))
24 if (!S_ISREG(inode
->i_mode
) && !S_ISLNK(inode
->i_mode
))
27 if (i_size_read(inode
) > MAX_INLINE_DATA
)
30 if (f2fs_encrypted_inode(inode
) && S_ISREG(inode
->i_mode
))
36 bool f2fs_may_inline_dentry(struct inode
*inode
)
38 if (!test_opt(F2FS_I_SB(inode
), INLINE_DENTRY
))
41 if (!S_ISDIR(inode
->i_mode
))
47 void read_inline_data(struct page
*page
, struct page
*ipage
)
49 void *src_addr
, *dst_addr
;
51 if (PageUptodate(page
))
54 f2fs_bug_on(F2FS_P_SB(page
), page
->index
);
56 zero_user_segment(page
, MAX_INLINE_DATA
, PAGE_CACHE_SIZE
);
58 /* Copy the whole inline data block */
59 src_addr
= inline_data_addr(ipage
);
60 dst_addr
= kmap_atomic(page
);
61 memcpy(dst_addr
, src_addr
, MAX_INLINE_DATA
);
62 flush_dcache_page(page
);
63 kunmap_atomic(dst_addr
);
64 SetPageUptodate(page
);
67 bool truncate_inline_inode(struct page
*ipage
, u64 from
)
71 if (from
>= MAX_INLINE_DATA
)
74 addr
= inline_data_addr(ipage
);
76 f2fs_wait_on_page_writeback(ipage
, NODE
);
77 memset(addr
+ from
, 0, MAX_INLINE_DATA
- from
);
82 int f2fs_read_inline_data(struct inode
*inode
, struct page
*page
)
86 ipage
= get_node_page(F2FS_I_SB(inode
), inode
->i_ino
);
89 return PTR_ERR(ipage
);
92 if (!f2fs_has_inline_data(inode
)) {
93 f2fs_put_page(ipage
, 1);
98 zero_user_segment(page
, 0, PAGE_CACHE_SIZE
);
100 read_inline_data(page
, ipage
);
102 SetPageUptodate(page
);
103 f2fs_put_page(ipage
, 1);
108 int f2fs_convert_inline_page(struct dnode_of_data
*dn
, struct page
*page
)
110 void *src_addr
, *dst_addr
;
111 struct f2fs_io_info fio
= {
112 .sbi
= F2FS_I_SB(dn
->inode
),
114 .rw
= WRITE_SYNC
| REQ_PRIO
,
116 .encrypted_page
= NULL
,
120 f2fs_bug_on(F2FS_I_SB(dn
->inode
), page
->index
);
122 if (!f2fs_exist_data(dn
->inode
))
125 err
= f2fs_reserve_block(dn
, 0);
129 f2fs_wait_on_page_writeback(page
, DATA
);
131 if (PageUptodate(page
))
134 zero_user_segment(page
, MAX_INLINE_DATA
, PAGE_CACHE_SIZE
);
136 /* Copy the whole inline data block */
137 src_addr
= inline_data_addr(dn
->inode_page
);
138 dst_addr
= kmap_atomic(page
);
139 memcpy(dst_addr
, src_addr
, MAX_INLINE_DATA
);
140 flush_dcache_page(page
);
141 kunmap_atomic(dst_addr
);
142 SetPageUptodate(page
);
144 set_page_dirty(page
);
146 /* clear dirty state */
147 dirty
= clear_page_dirty_for_io(page
);
149 /* write data page to try to make data consistent */
150 set_page_writeback(page
);
151 fio
.blk_addr
= dn
->data_blkaddr
;
152 write_data_page(dn
, &fio
);
153 set_data_blkaddr(dn
);
154 f2fs_update_extent_cache(dn
);
155 f2fs_wait_on_page_writeback(page
, DATA
);
157 inode_dec_dirty_pages(dn
->inode
);
159 /* this converted inline_data should be recovered. */
160 set_inode_flag(F2FS_I(dn
->inode
), FI_APPEND_WRITE
);
162 /* clear inline data and flag after data writeback */
163 truncate_inline_inode(dn
->inode_page
, 0);
165 stat_dec_inline_inode(dn
->inode
);
166 f2fs_clear_inline_inode(dn
->inode
);
172 int f2fs_convert_inline_inode(struct inode
*inode
)
174 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
175 struct dnode_of_data dn
;
176 struct page
*ipage
, *page
;
179 page
= grab_cache_page(inode
->i_mapping
, 0);
185 ipage
= get_node_page(sbi
, inode
->i_ino
);
187 err
= PTR_ERR(ipage
);
191 set_new_dnode(&dn
, inode
, ipage
, ipage
, 0);
193 if (f2fs_has_inline_data(inode
))
194 err
= f2fs_convert_inline_page(&dn
, page
);
200 f2fs_put_page(page
, 1);
204 int f2fs_write_inline_data(struct inode
*inode
, struct page
*page
)
206 void *src_addr
, *dst_addr
;
207 struct dnode_of_data dn
;
210 set_new_dnode(&dn
, inode
, NULL
, NULL
, 0);
211 err
= get_dnode_of_data(&dn
, 0, LOOKUP_NODE
);
215 if (!f2fs_has_inline_data(inode
)) {
220 f2fs_bug_on(F2FS_I_SB(inode
), page
->index
);
222 f2fs_wait_on_page_writeback(dn
.inode_page
, NODE
);
223 src_addr
= kmap_atomic(page
);
224 dst_addr
= inline_data_addr(dn
.inode_page
);
225 memcpy(dst_addr
, src_addr
, MAX_INLINE_DATA
);
226 kunmap_atomic(src_addr
);
228 set_inode_flag(F2FS_I(inode
), FI_APPEND_WRITE
);
229 set_inode_flag(F2FS_I(inode
), FI_DATA_EXIST
);
231 sync_inode_page(&dn
);
236 bool recover_inline_data(struct inode
*inode
, struct page
*npage
)
238 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
239 struct f2fs_inode
*ri
= NULL
;
240 void *src_addr
, *dst_addr
;
244 * The inline_data recovery policy is as follows.
245 * [prev.] [next] of inline_data flag
246 * o o -> recover inline_data
247 * o x -> remove inline_data, and then recover data blocks
248 * x o -> remove inline_data, and then recover inline_data
249 * x x -> recover data blocks
252 ri
= F2FS_INODE(npage
);
254 if (f2fs_has_inline_data(inode
) &&
255 ri
&& (ri
->i_inline
& F2FS_INLINE_DATA
)) {
257 ipage
= get_node_page(sbi
, inode
->i_ino
);
258 f2fs_bug_on(sbi
, IS_ERR(ipage
));
260 f2fs_wait_on_page_writeback(ipage
, NODE
);
262 src_addr
= inline_data_addr(npage
);
263 dst_addr
= inline_data_addr(ipage
);
264 memcpy(dst_addr
, src_addr
, MAX_INLINE_DATA
);
266 set_inode_flag(F2FS_I(inode
), FI_INLINE_DATA
);
267 set_inode_flag(F2FS_I(inode
), FI_DATA_EXIST
);
269 update_inode(inode
, ipage
);
270 f2fs_put_page(ipage
, 1);
274 if (f2fs_has_inline_data(inode
)) {
275 ipage
= get_node_page(sbi
, inode
->i_ino
);
276 f2fs_bug_on(sbi
, IS_ERR(ipage
));
277 truncate_inline_inode(ipage
, 0);
278 f2fs_clear_inline_inode(inode
);
279 update_inode(inode
, ipage
);
280 f2fs_put_page(ipage
, 1);
281 } else if (ri
&& (ri
->i_inline
& F2FS_INLINE_DATA
)) {
282 truncate_blocks(inode
, 0, false);
288 struct f2fs_dir_entry
*find_in_inline_dir(struct inode
*dir
,
289 struct f2fs_filename
*fname
, struct page
**res_page
)
291 struct f2fs_sb_info
*sbi
= F2FS_SB(dir
->i_sb
);
292 struct f2fs_inline_dentry
*inline_dentry
;
293 struct qstr name
= FSTR_TO_QSTR(&fname
->disk_name
);
294 struct f2fs_dir_entry
*de
;
295 struct f2fs_dentry_ptr d
;
297 f2fs_hash_t namehash
;
299 ipage
= get_node_page(sbi
, dir
->i_ino
);
303 namehash
= f2fs_dentry_hash(&name
);
305 inline_dentry
= inline_data_addr(ipage
);
307 make_dentry_ptr(NULL
, &d
, (void *)inline_dentry
, 2);
308 de
= find_target_dentry(fname
, namehash
, NULL
, &d
);
313 f2fs_put_page(ipage
, 0);
316 * For the most part, it should be a bug when name_len is zero.
317 * We stop here for figuring out where the bugs has occurred.
319 f2fs_bug_on(sbi
, d
.max
< 0);
323 struct f2fs_dir_entry
*f2fs_parent_inline_dir(struct inode
*dir
,
326 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dir
);
328 struct f2fs_dir_entry
*de
;
329 struct f2fs_inline_dentry
*dentry_blk
;
331 ipage
= get_node_page(sbi
, dir
->i_ino
);
335 dentry_blk
= inline_data_addr(ipage
);
336 de
= &dentry_blk
->dentry
[1];
342 int make_empty_inline_dir(struct inode
*inode
, struct inode
*parent
,
345 struct f2fs_inline_dentry
*dentry_blk
;
346 struct f2fs_dentry_ptr d
;
348 dentry_blk
= inline_data_addr(ipage
);
350 make_dentry_ptr(NULL
, &d
, (void *)dentry_blk
, 2);
351 do_make_empty_dir(inode
, parent
, &d
);
353 set_page_dirty(ipage
);
355 /* update i_size to MAX_INLINE_DATA */
356 if (i_size_read(inode
) < MAX_INLINE_DATA
) {
357 i_size_write(inode
, MAX_INLINE_DATA
);
358 set_inode_flag(F2FS_I(inode
), FI_UPDATE_DIR
);
364 * NOTE: ipage is grabbed by caller, but if any error occurs, we should
365 * release ipage in this function.
367 static int f2fs_convert_inline_dir(struct inode
*dir
, struct page
*ipage
,
368 struct f2fs_inline_dentry
*inline_dentry
)
371 struct dnode_of_data dn
;
372 struct f2fs_dentry_block
*dentry_blk
;
375 page
= grab_cache_page(dir
->i_mapping
, 0);
377 f2fs_put_page(ipage
, 1);
381 set_new_dnode(&dn
, dir
, ipage
, NULL
, 0);
382 err
= f2fs_reserve_block(&dn
, 0);
386 f2fs_wait_on_page_writeback(page
, DATA
);
387 zero_user_segment(page
, MAX_INLINE_DATA
, PAGE_CACHE_SIZE
);
389 dentry_blk
= kmap_atomic(page
);
391 /* copy data from inline dentry block to new dentry block */
392 memcpy(dentry_blk
->dentry_bitmap
, inline_dentry
->dentry_bitmap
,
393 INLINE_DENTRY_BITMAP_SIZE
);
394 memset(dentry_blk
->dentry_bitmap
+ INLINE_DENTRY_BITMAP_SIZE
, 0,
395 SIZE_OF_DENTRY_BITMAP
- INLINE_DENTRY_BITMAP_SIZE
);
397 * we do not need to zero out remainder part of dentry and filename
398 * field, since we have used bitmap for marking the usage status of
399 * them, besides, we can also ignore copying/zeroing reserved space
400 * of dentry block, because them haven't been used so far.
402 memcpy(dentry_blk
->dentry
, inline_dentry
->dentry
,
403 sizeof(struct f2fs_dir_entry
) * NR_INLINE_DENTRY
);
404 memcpy(dentry_blk
->filename
, inline_dentry
->filename
,
405 NR_INLINE_DENTRY
* F2FS_SLOT_LEN
);
407 kunmap_atomic(dentry_blk
);
408 SetPageUptodate(page
);
409 set_page_dirty(page
);
411 /* clear inline dir and flag after data writeback */
412 truncate_inline_inode(ipage
, 0);
414 stat_dec_inline_dir(dir
);
415 clear_inode_flag(F2FS_I(dir
), FI_INLINE_DENTRY
);
417 if (i_size_read(dir
) < PAGE_CACHE_SIZE
) {
418 i_size_write(dir
, PAGE_CACHE_SIZE
);
419 set_inode_flag(F2FS_I(dir
), FI_UPDATE_DIR
);
422 sync_inode_page(&dn
);
424 f2fs_put_page(page
, 1);
428 int f2fs_add_inline_entry(struct inode
*dir
, const struct qstr
*name
,
429 struct inode
*inode
, nid_t ino
, umode_t mode
)
431 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dir
);
433 unsigned int bit_pos
;
434 f2fs_hash_t name_hash
;
435 size_t namelen
= name
->len
;
436 struct f2fs_inline_dentry
*dentry_blk
= NULL
;
437 struct f2fs_dentry_ptr d
;
438 int slots
= GET_DENTRY_SLOTS(namelen
);
439 struct page
*page
= NULL
;
442 ipage
= get_node_page(sbi
, dir
->i_ino
);
444 return PTR_ERR(ipage
);
446 dentry_blk
= inline_data_addr(ipage
);
447 bit_pos
= room_for_filename(&dentry_blk
->dentry_bitmap
,
448 slots
, NR_INLINE_DENTRY
);
449 if (bit_pos
>= NR_INLINE_DENTRY
) {
450 err
= f2fs_convert_inline_dir(dir
, ipage
, dentry_blk
);
458 down_write(&F2FS_I(inode
)->i_sem
);
459 page
= init_inode_metadata(inode
, dir
, name
, ipage
);
466 f2fs_wait_on_page_writeback(ipage
, NODE
);
468 name_hash
= f2fs_dentry_hash(name
);
469 make_dentry_ptr(NULL
, &d
, (void *)dentry_blk
, 2);
470 f2fs_update_dentry(ino
, mode
, &d
, name
, name_hash
, bit_pos
);
472 set_page_dirty(ipage
);
474 /* we don't need to mark_inode_dirty now */
476 F2FS_I(inode
)->i_pino
= dir
->i_ino
;
477 update_inode(inode
, page
);
478 f2fs_put_page(page
, 1);
481 update_parent_metadata(dir
, inode
, 0);
484 up_write(&F2FS_I(inode
)->i_sem
);
486 if (is_inode_flag_set(F2FS_I(dir
), FI_UPDATE_DIR
)) {
487 update_inode(dir
, ipage
);
488 clear_inode_flag(F2FS_I(dir
), FI_UPDATE_DIR
);
491 f2fs_put_page(ipage
, 1);
495 void f2fs_delete_inline_entry(struct f2fs_dir_entry
*dentry
, struct page
*page
,
496 struct inode
*dir
, struct inode
*inode
)
498 struct f2fs_inline_dentry
*inline_dentry
;
499 int slots
= GET_DENTRY_SLOTS(le16_to_cpu(dentry
->name_len
));
500 unsigned int bit_pos
;
504 f2fs_wait_on_page_writeback(page
, NODE
);
506 inline_dentry
= inline_data_addr(page
);
507 bit_pos
= dentry
- inline_dentry
->dentry
;
508 for (i
= 0; i
< slots
; i
++)
509 test_and_clear_bit_le(bit_pos
+ i
,
510 &inline_dentry
->dentry_bitmap
);
512 set_page_dirty(page
);
514 dir
->i_ctime
= dir
->i_mtime
= CURRENT_TIME
;
517 f2fs_drop_nlink(dir
, inode
, page
);
519 f2fs_put_page(page
, 1);
522 bool f2fs_empty_inline_dir(struct inode
*dir
)
524 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dir
);
526 unsigned int bit_pos
= 2;
527 struct f2fs_inline_dentry
*dentry_blk
;
529 ipage
= get_node_page(sbi
, dir
->i_ino
);
533 dentry_blk
= inline_data_addr(ipage
);
534 bit_pos
= find_next_bit_le(&dentry_blk
->dentry_bitmap
,
538 f2fs_put_page(ipage
, 1);
540 if (bit_pos
< NR_INLINE_DENTRY
)
546 int f2fs_read_inline_dir(struct file
*file
, struct dir_context
*ctx
,
547 struct f2fs_str
*fstr
)
549 struct inode
*inode
= file_inode(file
);
550 struct f2fs_inline_dentry
*inline_dentry
= NULL
;
551 struct page
*ipage
= NULL
;
552 struct f2fs_dentry_ptr d
;
554 if (ctx
->pos
== NR_INLINE_DENTRY
)
557 ipage
= get_node_page(F2FS_I_SB(inode
), inode
->i_ino
);
559 return PTR_ERR(ipage
);
561 inline_dentry
= inline_data_addr(ipage
);
563 make_dentry_ptr(inode
, &d
, (void *)inline_dentry
, 2);
565 if (!f2fs_fill_dentries(ctx
, &d
, 0, fstr
))
566 ctx
->pos
= NR_INLINE_DENTRY
;
568 f2fs_put_page(ipage
, 1);