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
, INLINE_DATA_OFFSET
,
47 INLINE_DATA_OFFSET
+ MAX_INLINE_DATA
);
49 /* Copy the whole inline data block */
50 src_addr
= inline_data_addr(ipage
);
51 dst_addr
= kmap(page
);
52 memcpy(dst_addr
, src_addr
, MAX_INLINE_DATA
);
54 f2fs_put_page(ipage
, 1);
56 SetPageUptodate(page
);
62 static int __f2fs_convert_inline_data(struct inode
*inode
, struct page
*page
)
66 struct dnode_of_data dn
;
67 void *src_addr
, *dst_addr
;
69 struct f2fs_sb_info
*sbi
= F2FS_SB(inode
->i_sb
);
70 struct f2fs_io_info fio
= {
72 .rw
= WRITE_SYNC
| REQ_PRIO
,
76 ipage
= get_node_page(sbi
, inode
->i_ino
);
78 return PTR_ERR(ipage
);
81 * i_addr[0] is not used for inline data,
82 * so reserving new block will not destroy inline data
84 set_new_dnode(&dn
, inode
, ipage
, ipage
, 0);
85 err
= f2fs_reserve_block(&dn
, 0);
87 f2fs_put_page(ipage
, 1);
92 zero_user_segment(page
, 0, PAGE_CACHE_SIZE
);
94 /* Copy the whole inline data block */
95 src_addr
= inline_data_addr(ipage
);
96 dst_addr
= kmap(page
);
97 memcpy(dst_addr
, src_addr
, MAX_INLINE_DATA
);
99 SetPageUptodate(page
);
101 /* write data page to try to make data consistent */
102 set_page_writeback(page
);
103 write_data_page(page
, &dn
, &new_blk_addr
, &fio
);
104 update_extent_cache(new_blk_addr
, &dn
);
105 f2fs_wait_on_page_writeback(page
, DATA
, true);
107 /* clear inline data and flag after data writeback */
108 zero_user_segment(ipage
, INLINE_DATA_OFFSET
,
109 INLINE_DATA_OFFSET
+ MAX_INLINE_DATA
);
110 clear_inode_flag(F2FS_I(inode
), FI_INLINE_DATA
);
111 stat_dec_inline_inode(inode
);
113 sync_inode_page(&dn
);
114 f2fs_put_page(ipage
, 1);
120 int f2fs_convert_inline_data(struct inode
*inode
, pgoff_t to_size
)
125 if (!f2fs_has_inline_data(inode
))
127 else if (to_size
<= MAX_INLINE_DATA
)
130 page
= grab_cache_page_write_begin(inode
->i_mapping
, 0, AOP_FLAG_NOFS
);
134 err
= __f2fs_convert_inline_data(inode
, page
);
135 f2fs_put_page(page
, 1);
139 int f2fs_write_inline_data(struct inode
*inode
,
140 struct page
*page
, unsigned size
)
142 void *src_addr
, *dst_addr
;
144 struct dnode_of_data dn
;
147 set_new_dnode(&dn
, inode
, NULL
, NULL
, 0);
148 err
= get_dnode_of_data(&dn
, 0, LOOKUP_NODE
);
151 ipage
= dn
.inode_page
;
153 zero_user_segment(ipage
, INLINE_DATA_OFFSET
,
154 INLINE_DATA_OFFSET
+ MAX_INLINE_DATA
);
155 src_addr
= kmap(page
);
156 dst_addr
= inline_data_addr(ipage
);
157 memcpy(dst_addr
, src_addr
, size
);
160 /* Release the first data block if it is allocated */
161 if (!f2fs_has_inline_data(inode
)) {
162 truncate_data_blocks_range(&dn
, 1);
163 set_inode_flag(F2FS_I(inode
), FI_INLINE_DATA
);
164 stat_inc_inline_inode(inode
);
167 sync_inode_page(&dn
);