Commit | Line | Data |
---|---|---|
0a8165d7 | 1 | /* |
19f99cee JK |
2 | * fs/f2fs/inode.c |
3 | * | |
4 | * Copyright (c) 2012 Samsung Electronics Co., Ltd. | |
5 | * http://www.samsung.com/ | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | #include <linux/fs.h> | |
12 | #include <linux/f2fs_fs.h> | |
13 | #include <linux/buffer_head.h> | |
14 | #include <linux/writeback.h> | |
15 | ||
16 | #include "f2fs.h" | |
17 | #include "node.h" | |
18 | ||
19f99cee JK |
19 | void f2fs_set_inode_flags(struct inode *inode) |
20 | { | |
21 | unsigned int flags = F2FS_I(inode)->i_flags; | |
22 | ||
23 | inode->i_flags &= ~(S_SYNC | S_APPEND | S_IMMUTABLE | | |
24 | S_NOATIME | S_DIRSYNC); | |
25 | ||
26 | if (flags & FS_SYNC_FL) | |
27 | inode->i_flags |= S_SYNC; | |
28 | if (flags & FS_APPEND_FL) | |
29 | inode->i_flags |= S_APPEND; | |
30 | if (flags & FS_IMMUTABLE_FL) | |
31 | inode->i_flags |= S_IMMUTABLE; | |
32 | if (flags & FS_NOATIME_FL) | |
33 | inode->i_flags |= S_NOATIME; | |
34 | if (flags & FS_DIRSYNC_FL) | |
35 | inode->i_flags |= S_DIRSYNC; | |
36 | } | |
37 | ||
19f99cee JK |
38 | static int do_read_inode(struct inode *inode) |
39 | { | |
40 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
41 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
42 | struct page *node_page; | |
43 | struct f2fs_node *rn; | |
44 | struct f2fs_inode *ri; | |
45 | ||
46 | /* Check if ino is within scope */ | |
064e0823 NJ |
47 | if (check_nid_range(sbi, inode->i_ino)) { |
48 | f2fs_msg(inode->i_sb, KERN_ERR, "bad inode number: %lu", | |
49 | (unsigned long) inode->i_ino); | |
50 | return -EINVAL; | |
51 | } | |
19f99cee JK |
52 | |
53 | node_page = get_node_page(sbi, inode->i_ino); | |
54 | if (IS_ERR(node_page)) | |
55 | return PTR_ERR(node_page); | |
56 | ||
57 | rn = page_address(node_page); | |
58 | ri = &(rn->i); | |
59 | ||
60 | inode->i_mode = le16_to_cpu(ri->i_mode); | |
61 | i_uid_write(inode, le32_to_cpu(ri->i_uid)); | |
62 | i_gid_write(inode, le32_to_cpu(ri->i_gid)); | |
63 | set_nlink(inode, le32_to_cpu(ri->i_links)); | |
64 | inode->i_size = le64_to_cpu(ri->i_size); | |
65 | inode->i_blocks = le64_to_cpu(ri->i_blocks); | |
66 | ||
67 | inode->i_atime.tv_sec = le64_to_cpu(ri->i_atime); | |
68 | inode->i_ctime.tv_sec = le64_to_cpu(ri->i_ctime); | |
69 | inode->i_mtime.tv_sec = le64_to_cpu(ri->i_mtime); | |
70 | inode->i_atime.tv_nsec = le32_to_cpu(ri->i_atime_nsec); | |
71 | inode->i_ctime.tv_nsec = le32_to_cpu(ri->i_ctime_nsec); | |
72 | inode->i_mtime.tv_nsec = le32_to_cpu(ri->i_mtime_nsec); | |
73 | inode->i_generation = le32_to_cpu(ri->i_generation); | |
7d79e75f CL |
74 | if (ri->i_addr[0]) |
75 | inode->i_rdev = old_decode_dev(le32_to_cpu(ri->i_addr[0])); | |
76 | else | |
77 | inode->i_rdev = new_decode_dev(le32_to_cpu(ri->i_addr[1])); | |
19f99cee JK |
78 | |
79 | fi->i_current_depth = le32_to_cpu(ri->i_current_depth); | |
80 | fi->i_xattr_nid = le32_to_cpu(ri->i_xattr_nid); | |
81 | fi->i_flags = le32_to_cpu(ri->i_flags); | |
82 | fi->flags = 0; | |
19f99cee | 83 | fi->i_advise = ri->i_advise; |
6666e6aa | 84 | fi->i_pino = le32_to_cpu(ri->i_pino); |
19f99cee JK |
85 | get_extent_info(&fi->ext, ri->i_ext); |
86 | f2fs_put_page(node_page, 1); | |
87 | return 0; | |
88 | } | |
89 | ||
90 | struct inode *f2fs_iget(struct super_block *sb, unsigned long ino) | |
91 | { | |
92 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
93 | struct inode *inode; | |
94 | int ret; | |
95 | ||
96 | inode = iget_locked(sb, ino); | |
97 | if (!inode) | |
98 | return ERR_PTR(-ENOMEM); | |
99 | if (!(inode->i_state & I_NEW)) | |
100 | return inode; | |
101 | if (ino == F2FS_NODE_INO(sbi) || ino == F2FS_META_INO(sbi)) | |
102 | goto make_now; | |
103 | ||
104 | ret = do_read_inode(inode); | |
105 | if (ret) | |
106 | goto bad_inode; | |
107 | ||
108 | if (!sbi->por_doing && inode->i_nlink == 0) { | |
109 | ret = -ENOENT; | |
110 | goto bad_inode; | |
111 | } | |
112 | ||
113 | make_now: | |
114 | if (ino == F2FS_NODE_INO(sbi)) { | |
115 | inode->i_mapping->a_ops = &f2fs_node_aops; | |
116 | mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO); | |
117 | } else if (ino == F2FS_META_INO(sbi)) { | |
118 | inode->i_mapping->a_ops = &f2fs_meta_aops; | |
119 | mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO); | |
120 | } else if (S_ISREG(inode->i_mode)) { | |
121 | inode->i_op = &f2fs_file_inode_operations; | |
122 | inode->i_fop = &f2fs_file_operations; | |
123 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
124 | } else if (S_ISDIR(inode->i_mode)) { | |
125 | inode->i_op = &f2fs_dir_inode_operations; | |
126 | inode->i_fop = &f2fs_dir_operations; | |
127 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
128 | mapping_set_gfp_mask(inode->i_mapping, GFP_HIGHUSER_MOVABLE | | |
129 | __GFP_ZERO); | |
130 | } else if (S_ISLNK(inode->i_mode)) { | |
131 | inode->i_op = &f2fs_symlink_inode_operations; | |
132 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
133 | } else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) || | |
134 | S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) { | |
135 | inode->i_op = &f2fs_special_inode_operations; | |
136 | init_special_inode(inode, inode->i_mode, inode->i_rdev); | |
137 | } else { | |
138 | ret = -EIO; | |
139 | goto bad_inode; | |
140 | } | |
141 | unlock_new_inode(inode); | |
142 | ||
143 | return inode; | |
144 | ||
145 | bad_inode: | |
146 | iget_failed(inode); | |
147 | return ERR_PTR(ret); | |
148 | } | |
149 | ||
150 | void update_inode(struct inode *inode, struct page *node_page) | |
151 | { | |
152 | struct f2fs_node *rn; | |
153 | struct f2fs_inode *ri; | |
154 | ||
155 | wait_on_page_writeback(node_page); | |
156 | ||
157 | rn = page_address(node_page); | |
158 | ri = &(rn->i); | |
159 | ||
160 | ri->i_mode = cpu_to_le16(inode->i_mode); | |
161 | ri->i_advise = F2FS_I(inode)->i_advise; | |
162 | ri->i_uid = cpu_to_le32(i_uid_read(inode)); | |
163 | ri->i_gid = cpu_to_le32(i_gid_read(inode)); | |
164 | ri->i_links = cpu_to_le32(inode->i_nlink); | |
165 | ri->i_size = cpu_to_le64(i_size_read(inode)); | |
166 | ri->i_blocks = cpu_to_le64(inode->i_blocks); | |
167 | set_raw_extent(&F2FS_I(inode)->ext, &ri->i_ext); | |
168 | ||
169 | ri->i_atime = cpu_to_le64(inode->i_atime.tv_sec); | |
170 | ri->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); | |
171 | ri->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec); | |
172 | ri->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec); | |
173 | ri->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); | |
174 | ri->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec); | |
175 | ri->i_current_depth = cpu_to_le32(F2FS_I(inode)->i_current_depth); | |
176 | ri->i_xattr_nid = cpu_to_le32(F2FS_I(inode)->i_xattr_nid); | |
177 | ri->i_flags = cpu_to_le32(F2FS_I(inode)->i_flags); | |
6666e6aa | 178 | ri->i_pino = cpu_to_le32(F2FS_I(inode)->i_pino); |
19f99cee | 179 | ri->i_generation = cpu_to_le32(inode->i_generation); |
7d79e75f CL |
180 | |
181 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { | |
182 | if (old_valid_dev(inode->i_rdev)) { | |
183 | ri->i_addr[0] = | |
184 | cpu_to_le32(old_encode_dev(inode->i_rdev)); | |
185 | ri->i_addr[1] = 0; | |
186 | } else { | |
187 | ri->i_addr[0] = 0; | |
188 | ri->i_addr[1] = | |
189 | cpu_to_le32(new_encode_dev(inode->i_rdev)); | |
190 | ri->i_addr[2] = 0; | |
191 | } | |
192 | } | |
193 | ||
398b1ac5 | 194 | set_cold_node(inode, node_page); |
19f99cee JK |
195 | set_page_dirty(node_page); |
196 | } | |
197 | ||
39936837 | 198 | int update_inode_page(struct inode *inode) |
19f99cee JK |
199 | { |
200 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
201 | struct page *node_page; | |
7d82db83 | 202 | |
19f99cee JK |
203 | node_page = get_node_page(sbi, inode->i_ino); |
204 | if (IS_ERR(node_page)) | |
205 | return PTR_ERR(node_page); | |
206 | ||
19f99cee JK |
207 | update_inode(inode, node_page); |
208 | f2fs_put_page(node_page, 1); | |
19f99cee JK |
209 | return 0; |
210 | } | |
211 | ||
39936837 JK |
212 | int f2fs_write_inode(struct inode *inode, struct writeback_control *wbc) |
213 | { | |
214 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
215 | int ret, ilock; | |
216 | ||
217 | if (inode->i_ino == F2FS_NODE_INO(sbi) || | |
218 | inode->i_ino == F2FS_META_INO(sbi)) | |
219 | return 0; | |
220 | ||
221 | if (wbc) | |
222 | f2fs_balance_fs(sbi); | |
223 | ||
224 | /* | |
225 | * We need to lock here to prevent from producing dirty node pages | |
226 | * during the urgent cleaning time when runing out of free sections. | |
227 | */ | |
228 | ilock = mutex_lock_op(sbi); | |
229 | ret = update_inode_page(inode); | |
230 | mutex_unlock_op(sbi, ilock); | |
231 | return ret; | |
232 | } | |
233 | ||
0a8165d7 | 234 | /* |
19f99cee JK |
235 | * Called at the last iput() if i_nlink is zero |
236 | */ | |
237 | void f2fs_evict_inode(struct inode *inode) | |
238 | { | |
239 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
39936837 | 240 | int ilock; |
19f99cee JK |
241 | |
242 | truncate_inode_pages(&inode->i_data, 0); | |
243 | ||
244 | if (inode->i_ino == F2FS_NODE_INO(sbi) || | |
245 | inode->i_ino == F2FS_META_INO(sbi)) | |
246 | goto no_delete; | |
247 | ||
248 | BUG_ON(atomic_read(&F2FS_I(inode)->dirty_dents)); | |
249 | remove_dirty_dir_inode(inode); | |
250 | ||
251 | if (inode->i_nlink || is_bad_inode(inode)) | |
252 | goto no_delete; | |
253 | ||
d6212a5f | 254 | sb_start_intwrite(inode->i_sb); |
19f99cee JK |
255 | set_inode_flag(F2FS_I(inode), FI_NO_ALLOC); |
256 | i_size_write(inode, 0); | |
257 | ||
258 | if (F2FS_HAS_BLOCKS(inode)) | |
259 | f2fs_truncate(inode); | |
260 | ||
39936837 | 261 | ilock = mutex_lock_op(sbi); |
19f99cee | 262 | remove_inode_page(inode); |
39936837 JK |
263 | mutex_unlock_op(sbi, ilock); |
264 | ||
d6212a5f | 265 | sb_end_intwrite(inode->i_sb); |
19f99cee JK |
266 | no_delete: |
267 | clear_inode(inode); | |
268 | } |