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);
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),
112 .op_flags = WRITE_SYNC | REQ_PRIO,
114 .encrypted_page = NULL,
118 if (!f2fs_exist_data(dn->inode))
121 err = f2fs_reserve_block(dn, 0);
125 f2fs_bug_on(F2FS_P_SB(page), PageWriteback(page));
127 read_inline_data(page, dn->inode_page);
128 set_page_dirty(page);
130 /* clear dirty state */
131 dirty = clear_page_dirty_for_io(page);
133 /* write data page to try to make data consistent */
134 set_page_writeback(page);
135 fio.old_blkaddr = dn->data_blkaddr;
136 write_data_page(dn, &fio);
137 f2fs_wait_on_page_writeback(page, DATA, true);
139 inode_dec_dirty_pages(dn->inode);
141 /* this converted inline_data should be recovered. */
142 set_inode_flag(F2FS_I(dn->inode), FI_APPEND_WRITE);
144 /* clear inline data and flag after data writeback */
145 truncate_inline_inode(dn->inode_page, 0);
146 clear_inline_node(dn->inode_page);
148 stat_dec_inline_inode(dn->inode);
149 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);
217 set_inode_flag(F2FS_I(inode), FI_APPEND_WRITE);
218 set_inode_flag(F2FS_I(inode), FI_DATA_EXIST);
220 sync_inode_page(&dn);
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(F2FS_I(inode), FI_INLINE_DATA);
257 set_inode_flag(F2FS_I(inode), FI_DATA_EXIST);
259 update_inode(inode, 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 update_inode(inode, ipage);
271 f2fs_put_page(ipage, 1);
272 } else if (ri && (ri->i_inline & F2FS_INLINE_DATA)) {
273 if (truncate_blocks(inode, 0, false))
280 struct f2fs_dir_entry *find_in_inline_dir(struct inode *dir,
281 struct fscrypt_name *fname, struct page **res_page)
283 struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
284 struct f2fs_inline_dentry *inline_dentry;
285 struct qstr name = FSTR_TO_QSTR(&fname->disk_name);
286 struct f2fs_dir_entry *de;
287 struct f2fs_dentry_ptr d;
289 f2fs_hash_t namehash;
291 ipage = get_node_page(sbi, dir->i_ino);
295 namehash = f2fs_dentry_hash(&name);
297 inline_dentry = inline_data_addr(ipage);
299 make_dentry_ptr(NULL, &d, (void *)inline_dentry, 2);
300 de = find_target_dentry(fname, namehash, NULL, &d);
305 f2fs_put_page(ipage, 0);
310 struct f2fs_dir_entry *f2fs_parent_inline_dir(struct inode *dir,
313 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
315 struct f2fs_dir_entry *de;
316 struct f2fs_inline_dentry *dentry_blk;
318 ipage = get_node_page(sbi, dir->i_ino);
322 dentry_blk = inline_data_addr(ipage);
323 de = &dentry_blk->dentry[1];
329 int make_empty_inline_dir(struct inode *inode, struct inode *parent,
332 struct f2fs_inline_dentry *dentry_blk;
333 struct f2fs_dentry_ptr d;
335 dentry_blk = inline_data_addr(ipage);
337 make_dentry_ptr(NULL, &d, (void *)dentry_blk, 2);
338 do_make_empty_dir(inode, parent, &d);
340 set_page_dirty(ipage);
342 /* update i_size to MAX_INLINE_DATA */
343 if (i_size_read(inode) < MAX_INLINE_DATA) {
344 i_size_write(inode, MAX_INLINE_DATA);
345 set_inode_flag(F2FS_I(inode), FI_UPDATE_DIR);
351 * NOTE: ipage is grabbed by caller, but if any error occurs, we should
352 * release ipage in this function.
354 static int f2fs_move_inline_dirents(struct inode *dir, struct page *ipage,
355 struct f2fs_inline_dentry *inline_dentry)
358 struct dnode_of_data dn;
359 struct f2fs_dentry_block *dentry_blk;
362 page = f2fs_grab_cache_page(dir->i_mapping, 0, false);
364 f2fs_put_page(ipage, 1);
368 set_new_dnode(&dn, dir, ipage, NULL, 0);
369 err = f2fs_reserve_block(&dn, 0);
373 f2fs_wait_on_page_writeback(page, DATA, true);
374 zero_user_segment(page, MAX_INLINE_DATA, PAGE_SIZE);
376 dentry_blk = kmap_atomic(page);
378 /* copy data from inline dentry block to new dentry block */
379 memcpy(dentry_blk->dentry_bitmap, inline_dentry->dentry_bitmap,
380 INLINE_DENTRY_BITMAP_SIZE);
381 memset(dentry_blk->dentry_bitmap + INLINE_DENTRY_BITMAP_SIZE, 0,
382 SIZE_OF_DENTRY_BITMAP - INLINE_DENTRY_BITMAP_SIZE);
384 * we do not need to zero out remainder part of dentry and filename
385 * field, since we have used bitmap for marking the usage status of
386 * them, besides, we can also ignore copying/zeroing reserved space
387 * of dentry block, because them haven't been used so far.
389 memcpy(dentry_blk->dentry, inline_dentry->dentry,
390 sizeof(struct f2fs_dir_entry) * NR_INLINE_DENTRY);
391 memcpy(dentry_blk->filename, inline_dentry->filename,
392 NR_INLINE_DENTRY * F2FS_SLOT_LEN);
394 kunmap_atomic(dentry_blk);
395 SetPageUptodate(page);
396 set_page_dirty(page);
398 /* clear inline dir and flag after data writeback */
399 truncate_inline_inode(ipage, 0);
401 stat_dec_inline_dir(dir);
402 clear_inode_flag(F2FS_I(dir), FI_INLINE_DENTRY);
404 F2FS_I(dir)->i_current_depth = 1;
405 if (i_size_read(dir) < PAGE_SIZE) {
406 i_size_write(dir, PAGE_SIZE);
407 set_inode_flag(F2FS_I(dir), FI_UPDATE_DIR);
410 sync_inode_page(&dn);
412 f2fs_put_page(page, 1);
416 static int f2fs_add_inline_entries(struct inode *dir,
417 struct f2fs_inline_dentry *inline_dentry)
419 struct f2fs_dentry_ptr d;
420 unsigned long bit_pos = 0;
423 make_dentry_ptr(NULL, &d, (void *)inline_dentry, 2);
425 while (bit_pos < d.max) {
426 struct f2fs_dir_entry *de;
427 struct qstr new_name;
431 if (!test_bit_le(bit_pos, d.bitmap)) {
436 de = &d.dentry[bit_pos];
438 if (unlikely(!de->name_len)) {
443 new_name.name = d.filename[bit_pos];
444 new_name.len = de->name_len;
446 ino = le32_to_cpu(de->ino);
447 fake_mode = get_de_type(de) << S_SHIFT;
449 err = f2fs_add_regular_entry(dir, &new_name, NULL,
452 goto punch_dentry_pages;
454 bit_pos += GET_DENTRY_SLOTS(le16_to_cpu(de->name_len));
458 truncate_inode_pages(&dir->i_data, 0);
459 truncate_blocks(dir, 0, false);
460 remove_dirty_inode(dir);
464 static int f2fs_move_rehashed_dirents(struct inode *dir, struct page *ipage,
465 struct f2fs_inline_dentry *inline_dentry)
467 struct f2fs_inline_dentry *backup_dentry;
468 struct f2fs_inode_info *fi = F2FS_I(dir);
471 backup_dentry = f2fs_kmalloc(sizeof(struct f2fs_inline_dentry),
473 if (!backup_dentry) {
474 f2fs_put_page(ipage, 1);
478 memcpy(backup_dentry, inline_dentry, MAX_INLINE_DATA);
479 truncate_inline_inode(ipage, 0);
483 err = f2fs_add_inline_entries(dir, backup_dentry);
489 stat_dec_inline_dir(dir);
490 clear_inode_flag(fi, FI_INLINE_DENTRY);
491 update_inode(dir, ipage);
492 kfree(backup_dentry);
496 memcpy(inline_dentry, backup_dentry, MAX_INLINE_DATA);
497 fi->i_current_depth = 0;
498 i_size_write(dir, MAX_INLINE_DATA);
499 update_inode(dir, ipage);
500 f2fs_put_page(ipage, 1);
502 kfree(backup_dentry);
506 static int f2fs_convert_inline_dir(struct inode *dir, struct page *ipage,
507 struct f2fs_inline_dentry *inline_dentry)
509 if (!F2FS_I(dir)->i_dir_level)
510 return f2fs_move_inline_dirents(dir, ipage, inline_dentry);
512 return f2fs_move_rehashed_dirents(dir, ipage, inline_dentry);
515 int f2fs_add_inline_entry(struct inode *dir, const struct qstr *name,
516 struct inode *inode, nid_t ino, umode_t mode)
518 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
520 unsigned int bit_pos;
521 f2fs_hash_t name_hash;
522 size_t namelen = name->len;
523 struct f2fs_inline_dentry *dentry_blk = NULL;
524 struct f2fs_dentry_ptr d;
525 int slots = GET_DENTRY_SLOTS(namelen);
526 struct page *page = NULL;
529 ipage = get_node_page(sbi, dir->i_ino);
531 return PTR_ERR(ipage);
533 dentry_blk = inline_data_addr(ipage);
534 bit_pos = room_for_filename(&dentry_blk->dentry_bitmap,
535 slots, NR_INLINE_DENTRY);
536 if (bit_pos >= NR_INLINE_DENTRY) {
537 err = f2fs_convert_inline_dir(dir, ipage, dentry_blk);
545 down_write(&F2FS_I(inode)->i_sem);
546 page = init_inode_metadata(inode, dir, name, ipage);
553 f2fs_wait_on_page_writeback(ipage, NODE, true);
555 name_hash = f2fs_dentry_hash(name);
556 make_dentry_ptr(NULL, &d, (void *)dentry_blk, 2);
557 f2fs_update_dentry(ino, mode, &d, name, name_hash, bit_pos);
559 set_page_dirty(ipage);
561 /* we don't need to mark_inode_dirty now */
563 F2FS_I(inode)->i_pino = dir->i_ino;
564 update_inode(inode, page);
565 f2fs_put_page(page, 1);
568 update_parent_metadata(dir, inode, 0);
571 up_write(&F2FS_I(inode)->i_sem);
573 if (is_inode_flag_set(F2FS_I(dir), FI_UPDATE_DIR)) {
574 update_inode(dir, ipage);
575 clear_inode_flag(F2FS_I(dir), FI_UPDATE_DIR);
578 f2fs_put_page(ipage, 1);
582 void f2fs_delete_inline_entry(struct f2fs_dir_entry *dentry, struct page *page,
583 struct inode *dir, struct inode *inode)
585 struct f2fs_inline_dentry *inline_dentry;
586 int slots = GET_DENTRY_SLOTS(le16_to_cpu(dentry->name_len));
587 unsigned int bit_pos;
591 f2fs_wait_on_page_writeback(page, NODE, true);
593 inline_dentry = inline_data_addr(page);
594 bit_pos = dentry - inline_dentry->dentry;
595 for (i = 0; i < slots; i++)
596 test_and_clear_bit_le(bit_pos + i,
597 &inline_dentry->dentry_bitmap);
599 set_page_dirty(page);
601 dir->i_ctime = dir->i_mtime = CURRENT_TIME;
604 f2fs_drop_nlink(dir, inode, page);
606 f2fs_put_page(page, 1);
609 bool f2fs_empty_inline_dir(struct inode *dir)
611 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
613 unsigned int bit_pos = 2;
614 struct f2fs_inline_dentry *dentry_blk;
616 ipage = get_node_page(sbi, dir->i_ino);
620 dentry_blk = inline_data_addr(ipage);
621 bit_pos = find_next_bit_le(&dentry_blk->dentry_bitmap,
625 f2fs_put_page(ipage, 1);
627 if (bit_pos < NR_INLINE_DENTRY)
633 int f2fs_read_inline_dir(struct file *file, struct dir_context *ctx,
634 struct fscrypt_str *fstr)
636 struct inode *inode = file_inode(file);
637 struct f2fs_inline_dentry *inline_dentry = NULL;
638 struct page *ipage = NULL;
639 struct f2fs_dentry_ptr d;
641 if (ctx->pos == NR_INLINE_DENTRY)
644 ipage = get_node_page(F2FS_I_SB(inode), inode->i_ino);
646 return PTR_ERR(ipage);
648 inline_dentry = inline_data_addr(ipage);
650 make_dentry_ptr(inode, &d, (void *)inline_dentry, 2);
652 if (!f2fs_fill_dentries(ctx, &d, 0, fstr))
653 ctx->pos = NR_INLINE_DENTRY;
655 f2fs_put_page(ipage, 1);
659 int f2fs_inline_data_fiemap(struct inode *inode,
660 struct fiemap_extent_info *fieinfo, __u64 start, __u64 len)
662 __u64 byteaddr, ilen;
663 __u32 flags = FIEMAP_EXTENT_DATA_INLINE | FIEMAP_EXTENT_NOT_ALIGNED |
669 ipage = get_node_page(F2FS_I_SB(inode), inode->i_ino);
671 return PTR_ERR(ipage);
673 if (!f2fs_has_inline_data(inode)) {
678 ilen = min_t(size_t, MAX_INLINE_DATA, i_size_read(inode));
681 if (start + len < ilen)
685 get_node_info(F2FS_I_SB(inode), inode->i_ino, &ni);
686 byteaddr = (__u64)ni.blk_addr << inode->i_sb->s_blocksize_bits;
687 byteaddr += (char *)inline_data_addr(ipage) - (char *)F2FS_INODE(ipage);
688 err = fiemap_fill_next_extent(fieinfo, start, byteaddr, ilen, flags);
690 f2fs_put_page(ipage, 1);