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(struct inode *inode)
21 if (!test_opt(F2FS_I_SB(inode), INLINE_DATA))
24 if (f2fs_is_atomic_file(inode))
27 nr_blocks = F2FS_I(inode)->i_xattr_nid ? 3 : 2;
28 if (inode->i_blocks > nr_blocks)
31 i_size = i_size_read(inode);
32 if (i_size > MAX_INLINE_DATA)
38 int f2fs_read_inline_data(struct inode *inode, struct page *page)
41 void *src_addr, *dst_addr;
44 zero_user_segment(page, 0, PAGE_CACHE_SIZE);
48 ipage = get_node_page(F2FS_I_SB(inode), inode->i_ino);
51 return PTR_ERR(ipage);
54 zero_user_segment(page, MAX_INLINE_DATA, PAGE_CACHE_SIZE);
56 /* Copy the whole inline data block */
57 src_addr = inline_data_addr(ipage);
58 dst_addr = kmap(page);
59 memcpy(dst_addr, src_addr, MAX_INLINE_DATA);
61 f2fs_put_page(ipage, 1);
64 SetPageUptodate(page);
70 static int __f2fs_convert_inline_data(struct inode *inode, struct page *page)
74 struct dnode_of_data dn;
75 void *src_addr, *dst_addr;
77 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
78 struct f2fs_io_info fio = {
80 .rw = WRITE_SYNC | REQ_PRIO,
84 ipage = get_node_page(sbi, inode->i_ino);
90 /* someone else converted inline_data already */
91 if (!f2fs_has_inline_data(inode))
95 * i_addr[0] is not used for inline data,
96 * so reserving new block will not destroy inline data
98 set_new_dnode(&dn, inode, ipage, NULL, 0);
99 err = f2fs_reserve_block(&dn, 0);
103 f2fs_wait_on_page_writeback(page, DATA);
104 zero_user_segment(page, MAX_INLINE_DATA, PAGE_CACHE_SIZE);
106 /* Copy the whole inline data block */
107 src_addr = inline_data_addr(ipage);
108 dst_addr = kmap(page);
109 memcpy(dst_addr, src_addr, MAX_INLINE_DATA);
111 SetPageUptodate(page);
113 /* write data page to try to make data consistent */
114 set_page_writeback(page);
115 write_data_page(page, &dn, &new_blk_addr, &fio);
116 update_extent_cache(new_blk_addr, &dn);
117 f2fs_wait_on_page_writeback(page, DATA);
119 /* clear inline data and flag after data writeback */
120 zero_user_segment(ipage, INLINE_DATA_OFFSET,
121 INLINE_DATA_OFFSET + MAX_INLINE_DATA);
122 clear_inode_flag(F2FS_I(inode), FI_INLINE_DATA);
123 stat_dec_inline_inode(inode);
125 sync_inode_page(&dn);
132 int f2fs_convert_inline_data(struct inode *inode, pgoff_t to_size,
135 struct page *new_page = page;
138 if (!f2fs_has_inline_data(inode))
140 else if (to_size <= MAX_INLINE_DATA)
143 if (!page || page->index != 0) {
144 new_page = grab_cache_page(inode->i_mapping, 0);
149 err = __f2fs_convert_inline_data(inode, new_page);
150 if (!page || page->index != 0)
151 f2fs_put_page(new_page, 1);
155 int f2fs_write_inline_data(struct inode *inode,
156 struct page *page, unsigned size)
158 void *src_addr, *dst_addr;
160 struct dnode_of_data dn;
163 set_new_dnode(&dn, inode, NULL, NULL, 0);
164 err = get_dnode_of_data(&dn, 0, LOOKUP_NODE);
167 ipage = dn.inode_page;
169 /* Release any data block if it is allocated */
170 if (!f2fs_has_inline_data(inode)) {
171 int count = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode));
172 truncate_data_blocks_range(&dn, count);
173 set_inode_flag(F2FS_I(inode), FI_INLINE_DATA);
174 stat_inc_inline_inode(inode);
177 f2fs_wait_on_page_writeback(ipage, NODE);
178 zero_user_segment(ipage, INLINE_DATA_OFFSET,
179 INLINE_DATA_OFFSET + MAX_INLINE_DATA);
180 src_addr = kmap(page);
181 dst_addr = inline_data_addr(ipage);
182 memcpy(dst_addr, src_addr, size);
185 set_inode_flag(F2FS_I(inode), FI_APPEND_WRITE);
186 sync_inode_page(&dn);
192 void truncate_inline_data(struct inode *inode, u64 from)
196 if (from >= MAX_INLINE_DATA)
199 ipage = get_node_page(F2FS_I_SB(inode), inode->i_ino);
203 f2fs_wait_on_page_writeback(ipage, NODE);
205 zero_user_segment(ipage, INLINE_DATA_OFFSET + from,
206 INLINE_DATA_OFFSET + MAX_INLINE_DATA);
207 set_page_dirty(ipage);
208 f2fs_put_page(ipage, 1);
211 bool recover_inline_data(struct inode *inode, struct page *npage)
213 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
214 struct f2fs_inode *ri = NULL;
215 void *src_addr, *dst_addr;
219 * The inline_data recovery policy is as follows.
220 * [prev.] [next] of inline_data flag
221 * o o -> recover inline_data
222 * o x -> remove inline_data, and then recover data blocks
223 * x o -> remove inline_data, and then recover inline_data
224 * x x -> recover data blocks
227 ri = F2FS_INODE(npage);
229 if (f2fs_has_inline_data(inode) &&
230 ri && (ri->i_inline & F2FS_INLINE_DATA)) {
232 ipage = get_node_page(sbi, inode->i_ino);
233 f2fs_bug_on(sbi, IS_ERR(ipage));
235 f2fs_wait_on_page_writeback(ipage, NODE);
237 src_addr = inline_data_addr(npage);
238 dst_addr = inline_data_addr(ipage);
239 memcpy(dst_addr, src_addr, MAX_INLINE_DATA);
240 update_inode(inode, ipage);
241 f2fs_put_page(ipage, 1);
245 if (f2fs_has_inline_data(inode)) {
246 ipage = get_node_page(sbi, inode->i_ino);
247 f2fs_bug_on(sbi, IS_ERR(ipage));
248 f2fs_wait_on_page_writeback(ipage, NODE);
249 zero_user_segment(ipage, INLINE_DATA_OFFSET,
250 INLINE_DATA_OFFSET + MAX_INLINE_DATA);
251 clear_inode_flag(F2FS_I(inode), FI_INLINE_DATA);
252 update_inode(inode, ipage);
253 f2fs_put_page(ipage, 1);
254 } else if (ri && (ri->i_inline & F2FS_INLINE_DATA)) {
255 truncate_blocks(inode, 0, false);
256 set_inode_flag(F2FS_I(inode), FI_INLINE_DATA);
262 struct f2fs_dir_entry *find_in_inline_dir(struct inode *dir,
263 struct qstr *name, struct page **res_page)
265 struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
266 struct f2fs_inline_dentry *inline_dentry;
267 struct f2fs_dir_entry *de;
269 int max_slots = NR_INLINE_DENTRY;
271 ipage = get_node_page(sbi, dir->i_ino);
275 inline_dentry = inline_data_addr(ipage);
277 de = find_target_dentry(name, &max_slots, &inline_dentry->dentry_bitmap,
278 inline_dentry->dentry,
279 inline_dentry->filename);
284 f2fs_put_page(ipage, 0);
287 * For the most part, it should be a bug when name_len is zero.
288 * We stop here for figuring out where the bugs has occurred.
290 f2fs_bug_on(sbi, max_slots < 0);
294 struct f2fs_dir_entry *f2fs_parent_inline_dir(struct inode *dir,
297 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
299 struct f2fs_dir_entry *de;
300 struct f2fs_inline_dentry *dentry_blk;
302 ipage = get_node_page(sbi, dir->i_ino);
306 dentry_blk = inline_data_addr(ipage);
307 de = &dentry_blk->dentry[1];
313 int make_empty_inline_dir(struct inode *inode, struct inode *parent,
316 struct f2fs_inline_dentry *dentry_blk;
317 struct f2fs_dir_entry *de;
319 dentry_blk = inline_data_addr(ipage);
321 de = &dentry_blk->dentry[0];
322 de->name_len = cpu_to_le16(1);
324 de->ino = cpu_to_le32(inode->i_ino);
325 memcpy(dentry_blk->filename[0], ".", 1);
326 set_de_type(de, inode);
328 de = &dentry_blk->dentry[1];
330 de->name_len = cpu_to_le16(2);
331 de->ino = cpu_to_le32(parent->i_ino);
332 memcpy(dentry_blk->filename[1], "..", 2);
333 set_de_type(de, inode);
335 test_and_set_bit_le(0, &dentry_blk->dentry_bitmap);
336 test_and_set_bit_le(1, &dentry_blk->dentry_bitmap);
338 set_page_dirty(ipage);
340 /* update i_size to MAX_INLINE_DATA */
341 if (i_size_read(inode) < MAX_INLINE_DATA) {
342 i_size_write(inode, MAX_INLINE_DATA);
343 set_inode_flag(F2FS_I(inode), FI_UPDATE_DIR);
348 int f2fs_convert_inline_dir(struct inode *dir, struct page *ipage,
349 struct f2fs_inline_dentry *inline_dentry)
352 struct dnode_of_data dn;
353 struct f2fs_dentry_block *dentry_blk;
356 page = grab_cache_page(dir->i_mapping, 0);
360 set_new_dnode(&dn, dir, ipage, NULL, 0);
361 err = f2fs_reserve_block(&dn, 0);
365 f2fs_wait_on_page_writeback(page, DATA);
366 zero_user_segment(page, 0, PAGE_CACHE_SIZE);
368 dentry_blk = kmap(page);
370 /* copy data from inline dentry block to new dentry block */
371 memcpy(dentry_blk->dentry_bitmap, inline_dentry->dentry_bitmap,
372 INLINE_DENTRY_BITMAP_SIZE);
373 memcpy(dentry_blk->dentry, inline_dentry->dentry,
374 sizeof(struct f2fs_dir_entry) * NR_INLINE_DENTRY);
375 memcpy(dentry_blk->filename, inline_dentry->filename,
376 NR_INLINE_DENTRY * F2FS_SLOT_LEN);
379 SetPageUptodate(page);
380 set_page_dirty(page);
382 /* clear inline dir and flag after data writeback */
383 zero_user_segment(ipage, INLINE_DATA_OFFSET,
384 INLINE_DATA_OFFSET + MAX_INLINE_DATA);
385 clear_inode_flag(F2FS_I(dir), FI_INLINE_DENTRY);
386 stat_dec_inline_inode(dir);
388 if (i_size_read(dir) < PAGE_CACHE_SIZE) {
389 i_size_write(dir, PAGE_CACHE_SIZE);
390 set_inode_flag(F2FS_I(dir), FI_UPDATE_DIR);
393 sync_inode_page(&dn);
395 f2fs_put_page(page, 1);
399 int f2fs_add_inline_entry(struct inode *dir, const struct qstr *name,
402 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
404 unsigned int bit_pos;
405 f2fs_hash_t name_hash;
406 struct f2fs_dir_entry *de;
407 size_t namelen = name->len;
408 struct f2fs_inline_dentry *dentry_blk = NULL;
409 int slots = GET_DENTRY_SLOTS(namelen);
414 name_hash = f2fs_dentry_hash(name);
416 ipage = get_node_page(sbi, dir->i_ino);
418 return PTR_ERR(ipage);
420 dentry_blk = inline_data_addr(ipage);
421 bit_pos = room_for_filename(&dentry_blk->dentry_bitmap,
422 slots, NR_INLINE_DENTRY);
423 if (bit_pos >= NR_INLINE_DENTRY) {
424 err = f2fs_convert_inline_dir(dir, ipage, dentry_blk);
430 down_write(&F2FS_I(inode)->i_sem);
431 page = init_inode_metadata(inode, dir, name, ipage);
437 f2fs_wait_on_page_writeback(ipage, NODE);
438 de = &dentry_blk->dentry[bit_pos];
439 de->hash_code = name_hash;
440 de->name_len = cpu_to_le16(namelen);
441 memcpy(dentry_blk->filename[bit_pos], name->name, name->len);
442 de->ino = cpu_to_le32(inode->i_ino);
443 set_de_type(de, inode);
444 for (i = 0; i < slots; i++)
445 test_and_set_bit_le(bit_pos + i, &dentry_blk->dentry_bitmap);
446 set_page_dirty(ipage);
448 /* we don't need to mark_inode_dirty now */
449 F2FS_I(inode)->i_pino = dir->i_ino;
450 update_inode(inode, page);
451 f2fs_put_page(page, 1);
453 update_parent_metadata(dir, inode, 0);
455 up_write(&F2FS_I(inode)->i_sem);
457 if (is_inode_flag_set(F2FS_I(dir), FI_UPDATE_DIR)) {
458 update_inode(dir, ipage);
459 clear_inode_flag(F2FS_I(dir), FI_UPDATE_DIR);
462 f2fs_put_page(ipage, 1);
466 void f2fs_delete_inline_entry(struct f2fs_dir_entry *dentry, struct page *page,
467 struct inode *dir, struct inode *inode)
469 struct f2fs_inline_dentry *inline_dentry;
470 int slots = GET_DENTRY_SLOTS(le16_to_cpu(dentry->name_len));
471 unsigned int bit_pos;
475 f2fs_wait_on_page_writeback(page, NODE);
477 inline_dentry = inline_data_addr(page);
478 bit_pos = dentry - inline_dentry->dentry;
479 for (i = 0; i < slots; i++)
480 test_and_clear_bit_le(bit_pos + i,
481 &inline_dentry->dentry_bitmap);
483 set_page_dirty(page);
485 dir->i_ctime = dir->i_mtime = CURRENT_TIME;
488 f2fs_drop_nlink(dir, inode, page);
490 f2fs_put_page(page, 1);
493 bool f2fs_empty_inline_dir(struct inode *dir)
495 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
497 unsigned int bit_pos = 2;
498 struct f2fs_inline_dentry *dentry_blk;
500 ipage = get_node_page(sbi, dir->i_ino);
504 dentry_blk = inline_data_addr(ipage);
505 bit_pos = find_next_bit_le(&dentry_blk->dentry_bitmap,
509 f2fs_put_page(ipage, 1);
511 if (bit_pos < NR_INLINE_DENTRY)
517 int f2fs_read_inline_dir(struct file *file, struct dir_context *ctx)
519 struct inode *inode = file_inode(file);
520 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
521 unsigned int bit_pos = 0;
522 struct f2fs_inline_dentry *inline_dentry = NULL;
523 struct f2fs_dir_entry *de = NULL;
524 struct page *ipage = NULL;
525 unsigned char d_type = DT_UNKNOWN;
527 if (ctx->pos == NR_INLINE_DENTRY)
530 ipage = get_node_page(sbi, inode->i_ino);
532 return PTR_ERR(ipage);
534 bit_pos = ((unsigned long)ctx->pos % NR_INLINE_DENTRY);
536 inline_dentry = inline_data_addr(ipage);
537 while (bit_pos < NR_INLINE_DENTRY) {
538 bit_pos = find_next_bit_le(&inline_dentry->dentry_bitmap,
541 if (bit_pos >= NR_INLINE_DENTRY)
544 de = &inline_dentry->dentry[bit_pos];
545 if (de->file_type < F2FS_FT_MAX)
546 d_type = f2fs_filetype_table[de->file_type];
551 inline_dentry->filename[bit_pos],
552 le16_to_cpu(de->name_len),
553 le32_to_cpu(de->ino), d_type))
556 bit_pos += GET_DENTRY_SLOTS(le16_to_cpu(de->name_len));
560 ctx->pos = NR_INLINE_DENTRY;
562 f2fs_put_page(ipage, 1);