4 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
5 * http://www.samsung.com/
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.
12 #include <linux/f2fs_fs.h>
13 #include <linux/buffer_head.h>
14 #include <linux/writeback.h>
19 struct f2fs_iget_args {
24 void f2fs_set_inode_flags(struct inode *inode)
26 unsigned int flags = F2FS_I(inode)->i_flags;
28 inode->i_flags &= ~(S_SYNC | S_APPEND | S_IMMUTABLE |
29 S_NOATIME | S_DIRSYNC);
31 if (flags & FS_SYNC_FL)
32 inode->i_flags |= S_SYNC;
33 if (flags & FS_APPEND_FL)
34 inode->i_flags |= S_APPEND;
35 if (flags & FS_IMMUTABLE_FL)
36 inode->i_flags |= S_IMMUTABLE;
37 if (flags & FS_NOATIME_FL)
38 inode->i_flags |= S_NOATIME;
39 if (flags & FS_DIRSYNC_FL)
40 inode->i_flags |= S_DIRSYNC;
43 static int f2fs_iget_test(struct inode *inode, void *data)
45 struct f2fs_iget_args *args = data;
47 if (inode->i_ino != args->ino)
49 if (inode->i_state & (I_FREEING | I_WILL_FREE)) {
56 struct inode *f2fs_iget_nowait(struct super_block *sb, unsigned long ino)
58 struct f2fs_iget_args args = {
62 struct inode *inode = ilookup5(sb, ino, f2fs_iget_test, &args);
67 return f2fs_iget(sb, ino);
68 return ERR_PTR(-ENOENT);
71 static int do_read_inode(struct inode *inode)
73 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
74 struct f2fs_inode_info *fi = F2FS_I(inode);
75 struct page *node_page;
77 struct f2fs_inode *ri;
79 /* Check if ino is within scope */
80 check_nid_range(sbi, inode->i_ino);
82 node_page = get_node_page(sbi, inode->i_ino);
83 if (IS_ERR(node_page))
84 return PTR_ERR(node_page);
86 rn = page_address(node_page);
89 inode->i_mode = le16_to_cpu(ri->i_mode);
90 i_uid_write(inode, le32_to_cpu(ri->i_uid));
91 i_gid_write(inode, le32_to_cpu(ri->i_gid));
92 set_nlink(inode, le32_to_cpu(ri->i_links));
93 inode->i_size = le64_to_cpu(ri->i_size);
94 inode->i_blocks = le64_to_cpu(ri->i_blocks);
96 inode->i_atime.tv_sec = le64_to_cpu(ri->i_atime);
97 inode->i_ctime.tv_sec = le64_to_cpu(ri->i_ctime);
98 inode->i_mtime.tv_sec = le64_to_cpu(ri->i_mtime);
99 inode->i_atime.tv_nsec = le32_to_cpu(ri->i_atime_nsec);
100 inode->i_ctime.tv_nsec = le32_to_cpu(ri->i_ctime_nsec);
101 inode->i_mtime.tv_nsec = le32_to_cpu(ri->i_mtime_nsec);
102 inode->i_generation = le32_to_cpu(ri->i_generation);
104 fi->i_current_depth = le32_to_cpu(ri->i_current_depth);
105 fi->i_xattr_nid = le32_to_cpu(ri->i_xattr_nid);
106 fi->i_flags = le32_to_cpu(ri->i_flags);
108 fi->data_version = le64_to_cpu(F2FS_CKPT(sbi)->checkpoint_ver) - 1;
109 fi->i_advise = ri->i_advise;
110 get_extent_info(&fi->ext, ri->i_ext);
111 f2fs_put_page(node_page, 1);
115 struct inode *f2fs_iget(struct super_block *sb, unsigned long ino)
117 struct f2fs_sb_info *sbi = F2FS_SB(sb);
121 inode = iget_locked(sb, ino);
123 return ERR_PTR(-ENOMEM);
124 if (!(inode->i_state & I_NEW))
126 if (ino == F2FS_NODE_INO(sbi) || ino == F2FS_META_INO(sbi))
129 ret = do_read_inode(inode);
133 if (!sbi->por_doing && inode->i_nlink == 0) {
139 if (ino == F2FS_NODE_INO(sbi)) {
140 inode->i_mapping->a_ops = &f2fs_node_aops;
141 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO);
142 } else if (ino == F2FS_META_INO(sbi)) {
143 inode->i_mapping->a_ops = &f2fs_meta_aops;
144 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO);
145 } else if (S_ISREG(inode->i_mode)) {
146 inode->i_op = &f2fs_file_inode_operations;
147 inode->i_fop = &f2fs_file_operations;
148 inode->i_mapping->a_ops = &f2fs_dblock_aops;
149 } else if (S_ISDIR(inode->i_mode)) {
150 inode->i_op = &f2fs_dir_inode_operations;
151 inode->i_fop = &f2fs_dir_operations;
152 inode->i_mapping->a_ops = &f2fs_dblock_aops;
153 mapping_set_gfp_mask(inode->i_mapping, GFP_HIGHUSER_MOVABLE |
155 } else if (S_ISLNK(inode->i_mode)) {
156 inode->i_op = &f2fs_symlink_inode_operations;
157 inode->i_mapping->a_ops = &f2fs_dblock_aops;
158 } else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) ||
159 S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) {
160 inode->i_op = &f2fs_special_inode_operations;
161 init_special_inode(inode, inode->i_mode, inode->i_rdev);
166 unlock_new_inode(inode);
175 void update_inode(struct inode *inode, struct page *node_page)
177 struct f2fs_node *rn;
178 struct f2fs_inode *ri;
180 wait_on_page_writeback(node_page);
182 rn = page_address(node_page);
185 ri->i_mode = cpu_to_le16(inode->i_mode);
186 ri->i_advise = F2FS_I(inode)->i_advise;
187 ri->i_uid = cpu_to_le32(i_uid_read(inode));
188 ri->i_gid = cpu_to_le32(i_gid_read(inode));
189 ri->i_links = cpu_to_le32(inode->i_nlink);
190 ri->i_size = cpu_to_le64(i_size_read(inode));
191 ri->i_blocks = cpu_to_le64(inode->i_blocks);
192 set_raw_extent(&F2FS_I(inode)->ext, &ri->i_ext);
194 ri->i_atime = cpu_to_le64(inode->i_atime.tv_sec);
195 ri->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
196 ri->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec);
197 ri->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
198 ri->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
199 ri->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec);
200 ri->i_current_depth = cpu_to_le32(F2FS_I(inode)->i_current_depth);
201 ri->i_xattr_nid = cpu_to_le32(F2FS_I(inode)->i_xattr_nid);
202 ri->i_flags = cpu_to_le32(F2FS_I(inode)->i_flags);
203 ri->i_generation = cpu_to_le32(inode->i_generation);
204 set_page_dirty(node_page);
207 int f2fs_write_inode(struct inode *inode, struct writeback_control *wbc)
209 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
210 struct page *node_page;
211 bool need_lock = false;
213 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
214 inode->i_ino == F2FS_META_INO(sbi))
217 node_page = get_node_page(sbi, inode->i_ino);
218 if (IS_ERR(node_page))
219 return PTR_ERR(node_page);
221 if (!PageDirty(node_page)) {
223 f2fs_put_page(node_page, 1);
224 mutex_lock(&sbi->write_inode);
225 node_page = get_node_page(sbi, inode->i_ino);
226 if (IS_ERR(node_page)) {
227 mutex_unlock(&sbi->write_inode);
228 return PTR_ERR(node_page);
231 update_inode(inode, node_page);
232 f2fs_put_page(node_page, 1);
234 mutex_unlock(&sbi->write_inode);
239 * Called at the last iput() if i_nlink is zero
241 void f2fs_evict_inode(struct inode *inode)
243 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
245 truncate_inode_pages(&inode->i_data, 0);
247 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
248 inode->i_ino == F2FS_META_INO(sbi))
251 BUG_ON(atomic_read(&F2FS_I(inode)->dirty_dents));
252 remove_dirty_dir_inode(inode);
254 if (inode->i_nlink || is_bad_inode(inode))
257 set_inode_flag(F2FS_I(inode), FI_NO_ALLOC);
258 i_size_write(inode, 0);
260 if (F2FS_HAS_BLOCKS(inode))
261 f2fs_truncate(inode);
263 remove_inode_page(inode);