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 bool truncate_inline_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);
81 int f2fs_read_inline_data(struct inode *inode, struct page *page)
85 ipage = get_node_page(F2FS_I_SB(inode), inode->i_ino);
88 return PTR_ERR(ipage);
91 if (!f2fs_has_inline_data(inode)) {
92 f2fs_put_page(ipage, 1);
97 zero_user_segment(page, 0, PAGE_SIZE);
99 read_inline_data(page, ipage);
101 if (!PageUptodate(page))
102 SetPageUptodate(page);
103 f2fs_put_page(ipage, 1);
108 int f2fs_convert_inline_page(struct dnode_of_data *dn, struct page *page)
110 struct f2fs_io_info fio = {
111 .sbi = F2FS_I_SB(dn->inode),
114 .op_flags = WRITE_SYNC | REQ_PRIO,
116 .encrypted_page = NULL,
120 if (!f2fs_exist_data(dn->inode))
123 err = f2fs_reserve_block(dn, 0);
127 if (unlikely(dn->data_blkaddr != NEW_ADDR)) {
129 set_sbi_flag(fio.sbi, SBI_NEED_FSCK);
130 f2fs_msg(fio.sbi->sb, KERN_WARNING,
131 "%s: corrupted inline inode ino=%lx, i_addr[0]:0x%x, "
133 __func__, dn->inode->i_ino, dn->data_blkaddr);
137 f2fs_bug_on(F2FS_P_SB(page), PageWriteback(page));
139 read_inline_data(page, dn->inode_page);
140 set_page_dirty(page);
142 /* clear dirty state */
143 dirty = clear_page_dirty_for_io(page);
145 /* write data page to try to make data consistent */
146 set_page_writeback(page);
147 fio.old_blkaddr = dn->data_blkaddr;
148 write_data_page(dn, &fio);
149 f2fs_wait_on_page_writeback(page, DATA, true);
151 inode_dec_dirty_pages(dn->inode);
153 /* this converted inline_data should be recovered. */
154 set_inode_flag(dn->inode, FI_APPEND_WRITE);
156 /* clear inline data and flag after data writeback */
157 truncate_inline_inode(dn->inode_page, 0);
158 clear_inline_node(dn->inode_page);
160 stat_dec_inline_inode(dn->inode);
161 f2fs_clear_inline_inode(dn->inode);
166 int f2fs_convert_inline_inode(struct inode *inode)
168 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
169 struct dnode_of_data dn;
170 struct page *ipage, *page;
173 if (!f2fs_has_inline_data(inode))
176 page = f2fs_grab_cache_page(inode->i_mapping, 0, false);
182 ipage = get_node_page(sbi, inode->i_ino);
184 err = PTR_ERR(ipage);
188 set_new_dnode(&dn, inode, ipage, ipage, 0);
190 if (f2fs_has_inline_data(inode))
191 err = f2fs_convert_inline_page(&dn, page);
197 f2fs_put_page(page, 1);
200 f2fs_balance_fs(sbi, dn.node_changed);
205 int f2fs_write_inline_data(struct inode *inode, struct page *page)
207 void *src_addr, *dst_addr;
208 struct dnode_of_data dn;
211 set_new_dnode(&dn, inode, NULL, NULL, 0);
212 err = get_dnode_of_data(&dn, 0, LOOKUP_NODE);
216 if (!f2fs_has_inline_data(inode)) {
221 f2fs_bug_on(F2FS_I_SB(inode), page->index);
223 f2fs_wait_on_page_writeback(dn.inode_page, NODE, true);
224 src_addr = kmap_atomic(page);
225 dst_addr = inline_data_addr(dn.inode_page);
226 memcpy(dst_addr, src_addr, MAX_INLINE_DATA);
227 kunmap_atomic(src_addr);
228 set_page_dirty(dn.inode_page);
230 set_inode_flag(inode, FI_APPEND_WRITE);
231 set_inode_flag(inode, FI_DATA_EXIST);
233 clear_inline_node(dn.inode_page);
238 bool recover_inline_data(struct inode *inode, struct page *npage)
240 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
241 struct f2fs_inode *ri = NULL;
242 void *src_addr, *dst_addr;
246 * The inline_data recovery policy is as follows.
247 * [prev.] [next] of inline_data flag
248 * o o -> recover inline_data
249 * o x -> remove inline_data, and then recover data blocks
250 * x o -> remove inline_data, and then recover inline_data
251 * x x -> recover data blocks
254 ri = F2FS_INODE(npage);
256 if (f2fs_has_inline_data(inode) &&
257 ri && (ri->i_inline & F2FS_INLINE_DATA)) {
259 ipage = get_node_page(sbi, inode->i_ino);
260 f2fs_bug_on(sbi, IS_ERR(ipage));
262 f2fs_wait_on_page_writeback(ipage, NODE, true);
264 src_addr = inline_data_addr(npage);
265 dst_addr = inline_data_addr(ipage);
266 memcpy(dst_addr, src_addr, MAX_INLINE_DATA);
268 set_inode_flag(inode, FI_INLINE_DATA);
269 set_inode_flag(inode, FI_DATA_EXIST);
271 set_page_dirty(ipage);
272 f2fs_put_page(ipage, 1);
276 if (f2fs_has_inline_data(inode)) {
277 ipage = get_node_page(sbi, inode->i_ino);
278 f2fs_bug_on(sbi, IS_ERR(ipage));
279 if (!truncate_inline_inode(ipage, 0))
281 f2fs_clear_inline_inode(inode);
282 f2fs_put_page(ipage, 1);
283 } else if (ri && (ri->i_inline & F2FS_INLINE_DATA)) {
284 if (truncate_blocks(inode, 0, false))
291 struct f2fs_dir_entry *find_in_inline_dir(struct inode *dir,
292 struct fscrypt_name *fname, struct page **res_page)
294 struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
295 struct f2fs_inline_dentry *inline_dentry;
296 struct qstr name = FSTR_TO_QSTR(&fname->disk_name);
297 struct f2fs_dir_entry *de;
298 struct f2fs_dentry_ptr d;
300 f2fs_hash_t namehash;
302 ipage = get_node_page(sbi, dir->i_ino);
308 namehash = f2fs_dentry_hash(&name, fname);
310 inline_dentry = inline_data_addr(ipage);
312 make_dentry_ptr(NULL, &d, (void *)inline_dentry, 2);
313 de = find_target_dentry(fname, namehash, NULL, &d);
318 f2fs_put_page(ipage, 0);
323 int make_empty_inline_dir(struct inode *inode, struct inode *parent,
326 struct f2fs_inline_dentry *dentry_blk;
327 struct f2fs_dentry_ptr d;
329 dentry_blk = inline_data_addr(ipage);
331 make_dentry_ptr(NULL, &d, (void *)dentry_blk, 2);
332 do_make_empty_dir(inode, parent, &d);
334 set_page_dirty(ipage);
336 /* update i_size to MAX_INLINE_DATA */
337 if (i_size_read(inode) < MAX_INLINE_DATA)
338 f2fs_i_size_write(inode, MAX_INLINE_DATA);
343 * NOTE: ipage is grabbed by caller, but if any error occurs, we should
344 * release ipage in this function.
346 static int f2fs_move_inline_dirents(struct inode *dir, struct page *ipage,
347 struct f2fs_inline_dentry *inline_dentry)
350 struct dnode_of_data dn;
351 struct f2fs_dentry_block *dentry_blk;
354 page = f2fs_grab_cache_page(dir->i_mapping, 0, false);
356 f2fs_put_page(ipage, 1);
360 set_new_dnode(&dn, dir, ipage, NULL, 0);
361 err = f2fs_reserve_block(&dn, 0);
365 if (unlikely(dn.data_blkaddr != NEW_ADDR)) {
367 set_sbi_flag(F2FS_P_SB(page), SBI_NEED_FSCK);
368 f2fs_msg(F2FS_P_SB(page)->sb, KERN_WARNING,
369 "%s: corrupted inline inode ino=%lx, i_addr[0]:0x%x, "
371 __func__, dir->i_ino, dn.data_blkaddr);
376 f2fs_wait_on_page_writeback(page, DATA, true);
377 zero_user_segment(page, MAX_INLINE_DATA, PAGE_SIZE);
379 dentry_blk = kmap_atomic(page);
381 /* copy data from inline dentry block to new dentry block */
382 memcpy(dentry_blk->dentry_bitmap, inline_dentry->dentry_bitmap,
383 INLINE_DENTRY_BITMAP_SIZE);
384 memset(dentry_blk->dentry_bitmap + INLINE_DENTRY_BITMAP_SIZE, 0,
385 SIZE_OF_DENTRY_BITMAP - INLINE_DENTRY_BITMAP_SIZE);
387 * we do not need to zero out remainder part of dentry and filename
388 * field, since we have used bitmap for marking the usage status of
389 * them, besides, we can also ignore copying/zeroing reserved space
390 * of dentry block, because them haven't been used so far.
392 memcpy(dentry_blk->dentry, inline_dentry->dentry,
393 sizeof(struct f2fs_dir_entry) * NR_INLINE_DENTRY);
394 memcpy(dentry_blk->filename, inline_dentry->filename,
395 NR_INLINE_DENTRY * F2FS_SLOT_LEN);
397 kunmap_atomic(dentry_blk);
398 if (!PageUptodate(page))
399 SetPageUptodate(page);
400 set_page_dirty(page);
402 /* clear inline dir and flag after data writeback */
403 truncate_inline_inode(ipage, 0);
405 stat_dec_inline_dir(dir);
406 clear_inode_flag(dir, FI_INLINE_DENTRY);
408 f2fs_i_depth_write(dir, 1);
409 if (i_size_read(dir) < PAGE_SIZE)
410 f2fs_i_size_write(dir, PAGE_SIZE);
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, 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;
470 backup_dentry = f2fs_kmalloc(F2FS_I_SB(dir),
471 sizeof(struct f2fs_inline_dentry), GFP_F2FS_ZERO);
472 if (!backup_dentry) {
473 f2fs_put_page(ipage, 1);
477 memcpy(backup_dentry, inline_dentry, MAX_INLINE_DATA);
478 truncate_inline_inode(ipage, 0);
482 err = f2fs_add_inline_entries(dir, backup_dentry);
488 stat_dec_inline_dir(dir);
489 clear_inode_flag(dir, FI_INLINE_DENTRY);
490 kfree(backup_dentry);
494 memcpy(inline_dentry, backup_dentry, MAX_INLINE_DATA);
495 f2fs_i_depth_write(dir, 0);
496 f2fs_i_size_write(dir, MAX_INLINE_DATA);
497 set_page_dirty(ipage);
498 f2fs_put_page(ipage, 1);
500 kfree(backup_dentry);
504 static int f2fs_convert_inline_dir(struct inode *dir, struct page *ipage,
505 struct f2fs_inline_dentry *inline_dentry)
507 if (!F2FS_I(dir)->i_dir_level)
508 return f2fs_move_inline_dirents(dir, ipage, inline_dentry);
510 return f2fs_move_rehashed_dirents(dir, ipage, inline_dentry);
513 int f2fs_add_inline_entry(struct inode *dir, const struct qstr *new_name,
514 const struct qstr *orig_name,
515 struct inode *inode, nid_t ino, umode_t mode)
517 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
519 unsigned int bit_pos;
520 f2fs_hash_t name_hash;
521 struct f2fs_inline_dentry *dentry_blk = NULL;
522 struct f2fs_dentry_ptr d;
523 int slots = GET_DENTRY_SLOTS(new_name->len);
524 struct page *page = NULL;
527 ipage = get_node_page(sbi, dir->i_ino);
529 return PTR_ERR(ipage);
531 dentry_blk = inline_data_addr(ipage);
532 bit_pos = room_for_filename(&dentry_blk->dentry_bitmap,
533 slots, NR_INLINE_DENTRY);
534 if (bit_pos >= NR_INLINE_DENTRY) {
535 err = f2fs_convert_inline_dir(dir, ipage, dentry_blk);
543 down_write(&F2FS_I(inode)->i_sem);
544 page = init_inode_metadata(inode, dir, new_name,
550 if (f2fs_encrypted_inode(dir))
551 file_set_enc_name(inode);
554 f2fs_wait_on_page_writeback(ipage, NODE, true);
556 name_hash = f2fs_dentry_hash(new_name, NULL);
557 make_dentry_ptr(NULL, &d, (void *)dentry_blk, 2);
558 f2fs_update_dentry(ino, mode, &d, new_name, name_hash, bit_pos);
560 set_page_dirty(ipage);
562 /* we don't need to mark_inode_dirty now */
564 f2fs_i_pino_write(inode, dir->i_ino);
565 f2fs_put_page(page, 1);
568 update_parent_metadata(dir, inode, 0);
571 up_write(&F2FS_I(inode)->i_sem);
573 f2fs_put_page(ipage, 1);
577 void f2fs_delete_inline_entry(struct f2fs_dir_entry *dentry, struct page *page,
578 struct inode *dir, struct inode *inode)
580 struct f2fs_inline_dentry *inline_dentry;
581 int slots = GET_DENTRY_SLOTS(le16_to_cpu(dentry->name_len));
582 unsigned int bit_pos;
586 f2fs_wait_on_page_writeback(page, NODE, true);
588 inline_dentry = inline_data_addr(page);
589 bit_pos = dentry - inline_dentry->dentry;
590 for (i = 0; i < slots; i++)
591 __clear_bit_le(bit_pos + i,
592 &inline_dentry->dentry_bitmap);
594 set_page_dirty(page);
595 f2fs_put_page(page, 1);
597 dir->i_ctime = dir->i_mtime = current_time(dir);
598 f2fs_mark_inode_dirty_sync(dir);
601 f2fs_drop_nlink(dir, inode);
604 bool f2fs_empty_inline_dir(struct inode *dir)
606 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
608 unsigned int bit_pos = 2;
609 struct f2fs_inline_dentry *dentry_blk;
611 ipage = get_node_page(sbi, dir->i_ino);
615 dentry_blk = inline_data_addr(ipage);
616 bit_pos = find_next_bit_le(&dentry_blk->dentry_bitmap,
620 f2fs_put_page(ipage, 1);
622 if (bit_pos < NR_INLINE_DENTRY)
628 int f2fs_read_inline_dir(struct file *file, struct dir_context *ctx,
629 struct fscrypt_str *fstr)
631 struct inode *inode = file_inode(file);
632 struct f2fs_inline_dentry *inline_dentry = NULL;
633 struct page *ipage = NULL;
634 struct f2fs_dentry_ptr d;
636 if (ctx->pos == NR_INLINE_DENTRY)
639 ipage = get_node_page(F2FS_I_SB(inode), inode->i_ino);
641 return PTR_ERR(ipage);
643 inline_dentry = inline_data_addr(ipage);
645 make_dentry_ptr(inode, &d, (void *)inline_dentry, 2);
647 if (!f2fs_fill_dentries(ctx, &d, 0, fstr))
648 ctx->pos = NR_INLINE_DENTRY;
650 f2fs_put_page(ipage, 1);
654 int f2fs_inline_data_fiemap(struct inode *inode,
655 struct fiemap_extent_info *fieinfo, __u64 start, __u64 len)
657 __u64 byteaddr, ilen;
658 __u32 flags = FIEMAP_EXTENT_DATA_INLINE | FIEMAP_EXTENT_NOT_ALIGNED |
664 ipage = get_node_page(F2FS_I_SB(inode), inode->i_ino);
666 return PTR_ERR(ipage);
668 if (!f2fs_has_inline_data(inode)) {
673 ilen = min_t(size_t, MAX_INLINE_DATA, i_size_read(inode));
676 if (start + len < ilen)
680 get_node_info(F2FS_I_SB(inode), inode->i_ino, &ni);
681 byteaddr = (__u64)ni.blk_addr << inode->i_sb->s_blocksize_bits;
682 byteaddr += (char *)inline_data_addr(ipage) - (char *)F2FS_INODE(ipage);
683 err = fiemap_fill_next_extent(fieinfo, start, byteaddr, ilen, flags);
685 f2fs_put_page(ipage, 1);