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);
76 set_page_dirty(ipage);
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);
153 int f2fs_convert_inline_inode(struct inode *inode)
155 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
156 struct dnode_of_data dn;
157 struct page *ipage, *page;
160 if (!f2fs_has_inline_data(inode))
163 page = f2fs_grab_cache_page(inode->i_mapping, 0, false);
169 ipage = get_node_page(sbi, inode->i_ino);
171 err = PTR_ERR(ipage);
175 set_new_dnode(&dn, inode, ipage, ipage, 0);
177 if (f2fs_has_inline_data(inode))
178 err = f2fs_convert_inline_page(&dn, page);
184 f2fs_put_page(page, 1);
186 f2fs_balance_fs(sbi, dn.node_changed);
191 int f2fs_write_inline_data(struct inode *inode, struct page *page)
193 void *src_addr, *dst_addr;
194 struct dnode_of_data dn;
197 set_new_dnode(&dn, inode, NULL, NULL, 0);
198 err = get_dnode_of_data(&dn, 0, LOOKUP_NODE);
202 if (!f2fs_has_inline_data(inode)) {
207 f2fs_bug_on(F2FS_I_SB(inode), page->index);
209 f2fs_wait_on_page_writeback(dn.inode_page, NODE, true);
210 src_addr = kmap_atomic(page);
211 dst_addr = inline_data_addr(dn.inode_page);
212 memcpy(dst_addr, src_addr, MAX_INLINE_DATA);
213 kunmap_atomic(src_addr);
214 set_page_dirty(dn.inode_page);
216 set_inode_flag(inode, FI_APPEND_WRITE);
217 set_inode_flag(inode, FI_DATA_EXIST);
219 clear_inline_node(dn.inode_page);
224 bool recover_inline_data(struct inode *inode, struct page *npage)
226 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
227 struct f2fs_inode *ri = NULL;
228 void *src_addr, *dst_addr;
232 * The inline_data recovery policy is as follows.
233 * [prev.] [next] of inline_data flag
234 * o o -> recover inline_data
235 * o x -> remove inline_data, and then recover data blocks
236 * x o -> remove inline_data, and then recover inline_data
237 * x x -> recover data blocks
240 ri = F2FS_INODE(npage);
242 if (f2fs_has_inline_data(inode) &&
243 ri && (ri->i_inline & F2FS_INLINE_DATA)) {
245 ipage = get_node_page(sbi, inode->i_ino);
246 f2fs_bug_on(sbi, IS_ERR(ipage));
248 f2fs_wait_on_page_writeback(ipage, NODE, true);
250 src_addr = inline_data_addr(npage);
251 dst_addr = inline_data_addr(ipage);
252 memcpy(dst_addr, src_addr, MAX_INLINE_DATA);
254 set_inode_flag(inode, FI_INLINE_DATA);
255 set_inode_flag(inode, FI_DATA_EXIST);
257 set_page_dirty(ipage);
258 f2fs_put_page(ipage, 1);
262 if (f2fs_has_inline_data(inode)) {
263 ipage = get_node_page(sbi, inode->i_ino);
264 f2fs_bug_on(sbi, IS_ERR(ipage));
265 if (!truncate_inline_inode(ipage, 0))
267 f2fs_clear_inline_inode(inode);
268 f2fs_put_page(ipage, 1);
269 } else if (ri && (ri->i_inline & F2FS_INLINE_DATA)) {
270 if (truncate_blocks(inode, 0, false))
277 struct f2fs_dir_entry *find_in_inline_dir(struct inode *dir,
278 struct fscrypt_name *fname, struct page **res_page)
280 struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
281 struct f2fs_inline_dentry *inline_dentry;
282 struct qstr name = FSTR_TO_QSTR(&fname->disk_name);
283 struct f2fs_dir_entry *de;
284 struct f2fs_dentry_ptr d;
286 f2fs_hash_t namehash;
288 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);
348 * NOTE: ipage is grabbed by caller, but if any error occurs, we should
349 * release ipage in this function.
351 static int f2fs_move_inline_dirents(struct inode *dir, struct page *ipage,
352 struct f2fs_inline_dentry *inline_dentry)
355 struct dnode_of_data dn;
356 struct f2fs_dentry_block *dentry_blk;
359 page = f2fs_grab_cache_page(dir->i_mapping, 0, false);
361 f2fs_put_page(ipage, 1);
365 set_new_dnode(&dn, dir, ipage, NULL, 0);
366 err = f2fs_reserve_block(&dn, 0);
370 f2fs_wait_on_page_writeback(page, DATA, true);
371 zero_user_segment(page, MAX_INLINE_DATA, PAGE_SIZE);
373 dentry_blk = kmap_atomic(page);
375 /* copy data from inline dentry block to new dentry block */
376 memcpy(dentry_blk->dentry_bitmap, inline_dentry->dentry_bitmap,
377 INLINE_DENTRY_BITMAP_SIZE);
378 memset(dentry_blk->dentry_bitmap + INLINE_DENTRY_BITMAP_SIZE, 0,
379 SIZE_OF_DENTRY_BITMAP - INLINE_DENTRY_BITMAP_SIZE);
381 * we do not need to zero out remainder part of dentry and filename
382 * field, since we have used bitmap for marking the usage status of
383 * them, besides, we can also ignore copying/zeroing reserved space
384 * of dentry block, because them haven't been used so far.
386 memcpy(dentry_blk->dentry, inline_dentry->dentry,
387 sizeof(struct f2fs_dir_entry) * NR_INLINE_DENTRY);
388 memcpy(dentry_blk->filename, inline_dentry->filename,
389 NR_INLINE_DENTRY * F2FS_SLOT_LEN);
391 kunmap_atomic(dentry_blk);
392 SetPageUptodate(page);
393 set_page_dirty(page);
395 /* clear inline dir and flag after data writeback */
396 truncate_inline_inode(ipage, 0);
398 stat_dec_inline_dir(dir);
399 clear_inode_flag(dir, FI_INLINE_DENTRY);
401 f2fs_i_depth_write(dir, 1);
402 if (i_size_read(dir) < PAGE_SIZE)
403 f2fs_i_size_write(dir, PAGE_SIZE);
405 f2fs_put_page(page, 1);
409 static int f2fs_add_inline_entries(struct inode *dir,
410 struct f2fs_inline_dentry *inline_dentry)
412 struct f2fs_dentry_ptr d;
413 unsigned long bit_pos = 0;
416 make_dentry_ptr(NULL, &d, (void *)inline_dentry, 2);
418 while (bit_pos < d.max) {
419 struct f2fs_dir_entry *de;
420 struct qstr new_name;
424 if (!test_bit_le(bit_pos, d.bitmap)) {
429 de = &d.dentry[bit_pos];
431 if (unlikely(!de->name_len)) {
436 new_name.name = d.filename[bit_pos];
437 new_name.len = de->name_len;
439 ino = le32_to_cpu(de->ino);
440 fake_mode = get_de_type(de) << S_SHIFT;
442 err = f2fs_add_regular_entry(dir, &new_name, NULL,
445 goto punch_dentry_pages;
447 bit_pos += GET_DENTRY_SLOTS(le16_to_cpu(de->name_len));
451 truncate_inode_pages(&dir->i_data, 0);
452 truncate_blocks(dir, 0, false);
453 remove_dirty_inode(dir);
457 static int f2fs_move_rehashed_dirents(struct inode *dir, struct page *ipage,
458 struct f2fs_inline_dentry *inline_dentry)
460 struct f2fs_inline_dentry *backup_dentry;
463 backup_dentry = f2fs_kmalloc(sizeof(struct f2fs_inline_dentry),
465 if (!backup_dentry) {
466 f2fs_put_page(ipage, 1);
470 memcpy(backup_dentry, inline_dentry, MAX_INLINE_DATA);
471 truncate_inline_inode(ipage, 0);
475 err = f2fs_add_inline_entries(dir, backup_dentry);
481 stat_dec_inline_dir(dir);
482 clear_inode_flag(dir, FI_INLINE_DENTRY);
483 kfree(backup_dentry);
487 memcpy(inline_dentry, backup_dentry, MAX_INLINE_DATA);
488 f2fs_i_depth_write(dir, 0);
489 f2fs_i_size_write(dir, MAX_INLINE_DATA);
490 set_page_dirty(ipage);
491 f2fs_put_page(ipage, 1);
493 kfree(backup_dentry);
497 static int f2fs_convert_inline_dir(struct inode *dir, struct page *ipage,
498 struct f2fs_inline_dentry *inline_dentry)
500 if (!F2FS_I(dir)->i_dir_level)
501 return f2fs_move_inline_dirents(dir, ipage, inline_dentry);
503 return f2fs_move_rehashed_dirents(dir, ipage, inline_dentry);
506 int f2fs_add_inline_entry(struct inode *dir, const struct qstr *name,
507 struct inode *inode, nid_t ino, umode_t mode)
509 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
511 unsigned int bit_pos;
512 f2fs_hash_t name_hash;
513 size_t namelen = name->len;
514 struct f2fs_inline_dentry *dentry_blk = NULL;
515 struct f2fs_dentry_ptr d;
516 int slots = GET_DENTRY_SLOTS(namelen);
517 struct page *page = NULL;
520 ipage = get_node_page(sbi, dir->i_ino);
522 return PTR_ERR(ipage);
524 dentry_blk = inline_data_addr(ipage);
525 bit_pos = room_for_filename(&dentry_blk->dentry_bitmap,
526 slots, NR_INLINE_DENTRY);
527 if (bit_pos >= NR_INLINE_DENTRY) {
528 err = f2fs_convert_inline_dir(dir, ipage, dentry_blk);
536 down_write(&F2FS_I(inode)->i_sem);
537 page = init_inode_metadata(inode, dir, name, ipage);
544 f2fs_wait_on_page_writeback(ipage, NODE, true);
546 name_hash = f2fs_dentry_hash(name);
547 make_dentry_ptr(NULL, &d, (void *)dentry_blk, 2);
548 f2fs_update_dentry(ino, mode, &d, name, name_hash, bit_pos);
550 set_page_dirty(ipage);
552 /* we don't need to mark_inode_dirty now */
554 f2fs_i_pino_write(inode, dir->i_ino);
555 f2fs_put_page(page, 1);
558 update_parent_metadata(dir, inode, 0);
561 up_write(&F2FS_I(inode)->i_sem);
563 f2fs_put_page(ipage, 1);
567 void f2fs_delete_inline_entry(struct f2fs_dir_entry *dentry, struct page *page,
568 struct inode *dir, struct inode *inode)
570 struct f2fs_inline_dentry *inline_dentry;
571 int slots = GET_DENTRY_SLOTS(le16_to_cpu(dentry->name_len));
572 unsigned int bit_pos;
576 f2fs_wait_on_page_writeback(page, NODE, true);
578 inline_dentry = inline_data_addr(page);
579 bit_pos = dentry - inline_dentry->dentry;
580 for (i = 0; i < slots; i++)
581 test_and_clear_bit_le(bit_pos + i,
582 &inline_dentry->dentry_bitmap);
584 set_page_dirty(page);
586 dir->i_ctime = dir->i_mtime = CURRENT_TIME;
587 mark_inode_dirty_sync(dir);
590 f2fs_drop_nlink(dir, inode, page);
592 f2fs_put_page(page, 1);
595 bool f2fs_empty_inline_dir(struct inode *dir)
597 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
599 unsigned int bit_pos = 2;
600 struct f2fs_inline_dentry *dentry_blk;
602 ipage = get_node_page(sbi, dir->i_ino);
606 dentry_blk = inline_data_addr(ipage);
607 bit_pos = find_next_bit_le(&dentry_blk->dentry_bitmap,
611 f2fs_put_page(ipage, 1);
613 if (bit_pos < NR_INLINE_DENTRY)
619 int f2fs_read_inline_dir(struct file *file, struct dir_context *ctx,
620 struct fscrypt_str *fstr)
622 struct inode *inode = file_inode(file);
623 struct f2fs_inline_dentry *inline_dentry = NULL;
624 struct page *ipage = NULL;
625 struct f2fs_dentry_ptr d;
627 if (ctx->pos == NR_INLINE_DENTRY)
630 ipage = get_node_page(F2FS_I_SB(inode), inode->i_ino);
632 return PTR_ERR(ipage);
634 inline_dentry = inline_data_addr(ipage);
636 make_dentry_ptr(inode, &d, (void *)inline_dentry, 2);
638 if (!f2fs_fill_dentries(ctx, &d, 0, fstr))
639 ctx->pos = NR_INLINE_DENTRY;
641 f2fs_put_page(ipage, 1);
645 int f2fs_inline_data_fiemap(struct inode *inode,
646 struct fiemap_extent_info *fieinfo, __u64 start, __u64 len)
648 __u64 byteaddr, ilen;
649 __u32 flags = FIEMAP_EXTENT_DATA_INLINE | FIEMAP_EXTENT_NOT_ALIGNED |
655 ipage = get_node_page(F2FS_I_SB(inode), inode->i_ino);
657 return PTR_ERR(ipage);
659 if (!f2fs_has_inline_data(inode)) {
664 ilen = min_t(size_t, MAX_INLINE_DATA, i_size_read(inode));
667 if (start + len < ilen)
671 get_node_info(F2FS_I_SB(inode), inode->i_ino, &ni);
672 byteaddr = (__u64)ni.blk_addr << inode->i_sb->s_blocksize_bits;
673 byteaddr += (char *)inline_data_addr(ipage) - (char *)F2FS_INODE(ipage);
674 err = fiemap_fill_next_extent(fieinfo, start, byteaddr, ilen, flags);
676 f2fs_put_page(ipage, 1);