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)
18 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
22 if (!test_opt(sbi, INLINE_DATA))
25 nr_blocks = F2FS_I(inode)->i_xattr_nid ? 3 : 2;
26 if (inode->i_blocks > nr_blocks)
29 i_size = i_size_read(inode);
30 if (i_size > MAX_INLINE_DATA)
36 int f2fs_read_inline_data(struct inode *inode, struct page *page)
38 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
40 void *src_addr, *dst_addr;
42 ipage = get_node_page(sbi, inode->i_ino);
44 return PTR_ERR(ipage);
46 zero_user_segment(page, MAX_INLINE_DATA, PAGE_CACHE_SIZE);
48 /* Copy the whole inline data block */
49 src_addr = inline_data_addr(ipage);
50 dst_addr = kmap(page);
51 memcpy(dst_addr, src_addr, MAX_INLINE_DATA);
53 f2fs_put_page(ipage, 1);
55 SetPageUptodate(page);
61 static int __f2fs_convert_inline_data(struct inode *inode, struct page *page)
65 struct dnode_of_data dn;
66 void *src_addr, *dst_addr;
68 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
69 struct f2fs_io_info fio = {
71 .rw = WRITE_SYNC | REQ_PRIO,
75 ipage = get_node_page(sbi, inode->i_ino);
77 return PTR_ERR(ipage);
80 * i_addr[0] is not used for inline data,
81 * so reserving new block will not destroy inline data
83 set_new_dnode(&dn, inode, ipage, NULL, 0);
84 err = f2fs_reserve_block(&dn, 0);
90 zero_user_segment(page, MAX_INLINE_DATA, PAGE_CACHE_SIZE);
92 /* Copy the whole inline data block */
93 src_addr = inline_data_addr(ipage);
94 dst_addr = kmap(page);
95 memcpy(dst_addr, src_addr, MAX_INLINE_DATA);
97 SetPageUptodate(page);
99 /* write data page to try to make data consistent */
100 set_page_writeback(page);
101 write_data_page(page, &dn, &new_blk_addr, &fio);
102 update_extent_cache(new_blk_addr, &dn);
103 f2fs_wait_on_page_writeback(page, DATA, true);
105 /* clear inline data and flag after data writeback */
106 zero_user_segment(ipage, INLINE_DATA_OFFSET,
107 INLINE_DATA_OFFSET + MAX_INLINE_DATA);
108 clear_inode_flag(F2FS_I(inode), FI_INLINE_DATA);
109 stat_dec_inline_inode(inode);
111 sync_inode_page(&dn);
117 int f2fs_convert_inline_data(struct inode *inode, pgoff_t to_size)
122 if (!f2fs_has_inline_data(inode))
124 else if (to_size <= MAX_INLINE_DATA)
127 page = grab_cache_page_write_begin(inode->i_mapping, 0, AOP_FLAG_NOFS);
131 err = __f2fs_convert_inline_data(inode, page);
132 f2fs_put_page(page, 1);
136 int f2fs_write_inline_data(struct inode *inode,
137 struct page *page, unsigned size)
139 void *src_addr, *dst_addr;
141 struct dnode_of_data dn;
144 set_new_dnode(&dn, inode, NULL, NULL, 0);
145 err = get_dnode_of_data(&dn, 0, LOOKUP_NODE);
148 ipage = dn.inode_page;
150 zero_user_segment(ipage, INLINE_DATA_OFFSET,
151 INLINE_DATA_OFFSET + MAX_INLINE_DATA);
152 src_addr = kmap(page);
153 dst_addr = inline_data_addr(ipage);
154 memcpy(dst_addr, src_addr, size);
157 /* Release the first data block if it is allocated */
158 if (!f2fs_has_inline_data(inode)) {
159 truncate_data_blocks_range(&dn, 1);
160 set_inode_flag(F2FS_I(inode), FI_INLINE_DATA);
161 stat_inc_inline_inode(inode);
164 sync_inode_page(&dn);
170 int recover_inline_data(struct inode *inode, struct page *npage)
172 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
173 struct f2fs_inode *ri = NULL;
174 void *src_addr, *dst_addr;
178 * The inline_data recovery policy is as follows.
179 * [prev.] [next] of inline_data flag
180 * o o -> recover inline_data
181 * o x -> remove inline_data, and then recover data blocks
182 * x o -> remove inline_data, and then recover inline_data
183 * x x -> recover data blocks
186 ri = F2FS_INODE(npage);
188 if (f2fs_has_inline_data(inode) &&
189 ri && ri->i_inline & F2FS_INLINE_DATA) {
191 ipage = get_node_page(sbi, inode->i_ino);
192 f2fs_bug_on(IS_ERR(ipage));
194 src_addr = inline_data_addr(npage);
195 dst_addr = inline_data_addr(ipage);
196 memcpy(dst_addr, src_addr, MAX_INLINE_DATA);
197 update_inode(inode, ipage);
198 f2fs_put_page(ipage, 1);
202 if (f2fs_has_inline_data(inode)) {
203 ipage = get_node_page(sbi, inode->i_ino);
204 f2fs_bug_on(IS_ERR(ipage));
205 zero_user_segment(ipage, INLINE_DATA_OFFSET,
206 INLINE_DATA_OFFSET + MAX_INLINE_DATA);
207 clear_inode_flag(F2FS_I(inode), FI_INLINE_DATA);
208 update_inode(inode, ipage);
209 f2fs_put_page(ipage, 1);
210 } else if (ri && ri->i_inline & F2FS_INLINE_DATA) {
211 truncate_blocks(inode, 0);
212 set_inode_flag(F2FS_I(inode), FI_INLINE_DATA);