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e18c65b2 HL |
1 | /* |
2 | * fs/f2fs/inline.c | |
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. | |
9 | */ | |
10 | ||
11 | #include <linux/fs.h> | |
12 | #include <linux/f2fs_fs.h> | |
13 | ||
14 | #include "f2fs.h" | |
15 | ||
e18c65b2 HL |
16 | bool f2fs_may_inline(struct inode *inode) |
17 | { | |
18 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
19 | block_t nr_blocks; | |
20 | loff_t i_size; | |
21 | ||
22 | if (!test_opt(sbi, INLINE_DATA)) | |
23 | return false; | |
24 | ||
25 | nr_blocks = F2FS_I(inode)->i_xattr_nid ? 3 : 2; | |
26 | if (inode->i_blocks > nr_blocks) | |
27 | return false; | |
28 | ||
29 | i_size = i_size_read(inode); | |
30 | if (i_size > MAX_INLINE_DATA) | |
31 | return false; | |
32 | ||
33 | return true; | |
34 | } | |
35 | ||
36 | int f2fs_read_inline_data(struct inode *inode, struct page *page) | |
37 | { | |
38 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
39 | struct page *ipage; | |
40 | void *src_addr, *dst_addr; | |
41 | ||
04a17fb1 CY |
42 | if (page->index) { |
43 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); | |
44 | goto out; | |
45 | } | |
46 | ||
e18c65b2 | 47 | ipage = get_node_page(sbi, inode->i_ino); |
d54c795b CY |
48 | if (IS_ERR(ipage)) { |
49 | unlock_page(page); | |
e18c65b2 | 50 | return PTR_ERR(ipage); |
d54c795b | 51 | } |
e18c65b2 | 52 | |
18309aaa | 53 | zero_user_segment(page, MAX_INLINE_DATA, PAGE_CACHE_SIZE); |
e18c65b2 HL |
54 | |
55 | /* Copy the whole inline data block */ | |
56 | src_addr = inline_data_addr(ipage); | |
57 | dst_addr = kmap(page); | |
58 | memcpy(dst_addr, src_addr, MAX_INLINE_DATA); | |
59 | kunmap(page); | |
60 | f2fs_put_page(ipage, 1); | |
61 | ||
04a17fb1 | 62 | out: |
e18c65b2 HL |
63 | SetPageUptodate(page); |
64 | unlock_page(page); | |
65 | ||
66 | return 0; | |
67 | } | |
68 | ||
69 | static int __f2fs_convert_inline_data(struct inode *inode, struct page *page) | |
70 | { | |
71 | int err; | |
72 | struct page *ipage; | |
73 | struct dnode_of_data dn; | |
74 | void *src_addr, *dst_addr; | |
75 | block_t new_blk_addr; | |
76 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
77 | struct f2fs_io_info fio = { | |
78 | .type = DATA, | |
79 | .rw = WRITE_SYNC | REQ_PRIO, | |
80 | }; | |
81 | ||
82 | f2fs_lock_op(sbi); | |
83 | ipage = get_node_page(sbi, inode->i_ino); | |
15c6e3aa JK |
84 | if (IS_ERR(ipage)) { |
85 | err = PTR_ERR(ipage); | |
86 | goto out; | |
87 | } | |
e18c65b2 HL |
88 | |
89 | /* | |
90 | * i_addr[0] is not used for inline data, | |
91 | * so reserving new block will not destroy inline data | |
92 | */ | |
a8865372 | 93 | set_new_dnode(&dn, inode, ipage, NULL, 0); |
e18c65b2 | 94 | err = f2fs_reserve_block(&dn, 0); |
15c6e3aa JK |
95 | if (err) |
96 | goto out; | |
e18c65b2 | 97 | |
9ac1349a | 98 | f2fs_wait_on_page_writeback(page, DATA); |
18309aaa | 99 | zero_user_segment(page, MAX_INLINE_DATA, PAGE_CACHE_SIZE); |
e18c65b2 HL |
100 | |
101 | /* Copy the whole inline data block */ | |
102 | src_addr = inline_data_addr(ipage); | |
103 | dst_addr = kmap(page); | |
104 | memcpy(dst_addr, src_addr, MAX_INLINE_DATA); | |
105 | kunmap(page); | |
9e09fc85 | 106 | SetPageUptodate(page); |
e18c65b2 HL |
107 | |
108 | /* write data page to try to make data consistent */ | |
109 | set_page_writeback(page); | |
110 | write_data_page(page, &dn, &new_blk_addr, &fio); | |
111 | update_extent_cache(new_blk_addr, &dn); | |
5514f0aa | 112 | f2fs_wait_on_page_writeback(page, DATA); |
e18c65b2 HL |
113 | |
114 | /* clear inline data and flag after data writeback */ | |
115 | zero_user_segment(ipage, INLINE_DATA_OFFSET, | |
116 | INLINE_DATA_OFFSET + MAX_INLINE_DATA); | |
117 | clear_inode_flag(F2FS_I(inode), FI_INLINE_DATA); | |
0dbdc2ae | 118 | stat_dec_inline_inode(inode); |
e18c65b2 HL |
119 | |
120 | sync_inode_page(&dn); | |
a8865372 | 121 | f2fs_put_dnode(&dn); |
15c6e3aa | 122 | out: |
e18c65b2 | 123 | f2fs_unlock_op(sbi); |
e18c65b2 HL |
124 | return err; |
125 | } | |
126 | ||
b067ba1f JK |
127 | int f2fs_convert_inline_data(struct inode *inode, pgoff_t to_size, |
128 | struct page *page) | |
e18c65b2 | 129 | { |
b067ba1f | 130 | struct page *new_page = page; |
9e09fc85 | 131 | int err; |
e18c65b2 | 132 | |
9e09fc85 JK |
133 | if (!f2fs_has_inline_data(inode)) |
134 | return 0; | |
135 | else if (to_size <= MAX_INLINE_DATA) | |
136 | return 0; | |
e18c65b2 | 137 | |
b067ba1f JK |
138 | if (!page || page->index != 0) { |
139 | new_page = grab_cache_page(inode->i_mapping, 0); | |
140 | if (!new_page) | |
141 | return -ENOMEM; | |
142 | } | |
e18c65b2 | 143 | |
b067ba1f JK |
144 | err = __f2fs_convert_inline_data(inode, new_page); |
145 | if (!page || page->index != 0) | |
146 | f2fs_put_page(new_page, 1); | |
e18c65b2 HL |
147 | return err; |
148 | } | |
149 | ||
150 | int f2fs_write_inline_data(struct inode *inode, | |
b067ba1f | 151 | struct page *page, unsigned size) |
e18c65b2 HL |
152 | { |
153 | void *src_addr, *dst_addr; | |
154 | struct page *ipage; | |
155 | struct dnode_of_data dn; | |
156 | int err; | |
157 | ||
158 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
159 | err = get_dnode_of_data(&dn, 0, LOOKUP_NODE); | |
160 | if (err) | |
161 | return err; | |
162 | ipage = dn.inode_page; | |
163 | ||
54b591df | 164 | f2fs_wait_on_page_writeback(ipage, NODE); |
e18c65b2 HL |
165 | zero_user_segment(ipage, INLINE_DATA_OFFSET, |
166 | INLINE_DATA_OFFSET + MAX_INLINE_DATA); | |
167 | src_addr = kmap(page); | |
168 | dst_addr = inline_data_addr(ipage); | |
169 | memcpy(dst_addr, src_addr, size); | |
170 | kunmap(page); | |
171 | ||
172 | /* Release the first data block if it is allocated */ | |
173 | if (!f2fs_has_inline_data(inode)) { | |
174 | truncate_data_blocks_range(&dn, 1); | |
175 | set_inode_flag(F2FS_I(inode), FI_INLINE_DATA); | |
0dbdc2ae | 176 | stat_inc_inline_inode(inode); |
e18c65b2 HL |
177 | } |
178 | ||
fff04f90 | 179 | set_inode_flag(F2FS_I(inode), FI_APPEND_WRITE); |
e18c65b2 HL |
180 | sync_inode_page(&dn); |
181 | f2fs_put_dnode(&dn); | |
182 | ||
183 | return 0; | |
184 | } | |
1e1bb4ba | 185 | |
8aa6f1c5 CY |
186 | void truncate_inline_data(struct inode *inode, u64 from) |
187 | { | |
188 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
189 | struct page *ipage; | |
190 | ||
191 | if (from >= MAX_INLINE_DATA) | |
192 | return; | |
193 | ||
194 | ipage = get_node_page(sbi, inode->i_ino); | |
195 | if (IS_ERR(ipage)) | |
196 | return; | |
197 | ||
54b591df JK |
198 | f2fs_wait_on_page_writeback(ipage, NODE); |
199 | ||
8aa6f1c5 CY |
200 | zero_user_segment(ipage, INLINE_DATA_OFFSET + from, |
201 | INLINE_DATA_OFFSET + MAX_INLINE_DATA); | |
202 | set_page_dirty(ipage); | |
203 | f2fs_put_page(ipage, 1); | |
204 | } | |
205 | ||
0342fd30 | 206 | bool recover_inline_data(struct inode *inode, struct page *npage) |
1e1bb4ba JK |
207 | { |
208 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
209 | struct f2fs_inode *ri = NULL; | |
210 | void *src_addr, *dst_addr; | |
211 | struct page *ipage; | |
212 | ||
213 | /* | |
214 | * The inline_data recovery policy is as follows. | |
215 | * [prev.] [next] of inline_data flag | |
216 | * o o -> recover inline_data | |
217 | * o x -> remove inline_data, and then recover data blocks | |
218 | * x o -> remove inline_data, and then recover inline_data | |
219 | * x x -> recover data blocks | |
220 | */ | |
221 | if (IS_INODE(npage)) | |
222 | ri = F2FS_INODE(npage); | |
223 | ||
224 | if (f2fs_has_inline_data(inode) && | |
0342fd30 | 225 | ri && (ri->i_inline & F2FS_INLINE_DATA)) { |
1e1bb4ba JK |
226 | process_inline: |
227 | ipage = get_node_page(sbi, inode->i_ino); | |
228 | f2fs_bug_on(IS_ERR(ipage)); | |
229 | ||
54b591df JK |
230 | f2fs_wait_on_page_writeback(ipage, NODE); |
231 | ||
1e1bb4ba JK |
232 | src_addr = inline_data_addr(npage); |
233 | dst_addr = inline_data_addr(ipage); | |
234 | memcpy(dst_addr, src_addr, MAX_INLINE_DATA); | |
235 | update_inode(inode, ipage); | |
236 | f2fs_put_page(ipage, 1); | |
0342fd30 | 237 | return true; |
1e1bb4ba JK |
238 | } |
239 | ||
240 | if (f2fs_has_inline_data(inode)) { | |
241 | ipage = get_node_page(sbi, inode->i_ino); | |
242 | f2fs_bug_on(IS_ERR(ipage)); | |
54b591df | 243 | f2fs_wait_on_page_writeback(ipage, NODE); |
1e1bb4ba JK |
244 | zero_user_segment(ipage, INLINE_DATA_OFFSET, |
245 | INLINE_DATA_OFFSET + MAX_INLINE_DATA); | |
246 | clear_inode_flag(F2FS_I(inode), FI_INLINE_DATA); | |
247 | update_inode(inode, ipage); | |
248 | f2fs_put_page(ipage, 1); | |
0342fd30 | 249 | } else if (ri && (ri->i_inline & F2FS_INLINE_DATA)) { |
764aa3e9 | 250 | truncate_blocks(inode, 0, false); |
1e1bb4ba JK |
251 | set_inode_flag(F2FS_I(inode), FI_INLINE_DATA); |
252 | goto process_inline; | |
253 | } | |
0342fd30 | 254 | return false; |
1e1bb4ba | 255 | } |