perf evlist: Tidy duplicated munmap code
[platform/adaptation/renesas_rcar/renesas_kernel.git] / fs / f2fs / inode.c
1 /*
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
19 #include <trace/events/f2fs.h>
20
21 void f2fs_set_inode_flags(struct inode *inode)
22 {
23         unsigned int flags = F2FS_I(inode)->i_flags;
24
25         inode->i_flags &= ~(S_SYNC | S_APPEND | S_IMMUTABLE |
26                         S_NOATIME | S_DIRSYNC);
27
28         if (flags & FS_SYNC_FL)
29                 inode->i_flags |= S_SYNC;
30         if (flags & FS_APPEND_FL)
31                 inode->i_flags |= S_APPEND;
32         if (flags & FS_IMMUTABLE_FL)
33                 inode->i_flags |= S_IMMUTABLE;
34         if (flags & FS_NOATIME_FL)
35                 inode->i_flags |= S_NOATIME;
36         if (flags & FS_DIRSYNC_FL)
37                 inode->i_flags |= S_DIRSYNC;
38 }
39
40 static int do_read_inode(struct inode *inode)
41 {
42         struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
43         struct f2fs_inode_info *fi = F2FS_I(inode);
44         struct page *node_page;
45         struct f2fs_node *rn;
46         struct f2fs_inode *ri;
47
48         /* Check if ino is within scope */
49         if (check_nid_range(sbi, inode->i_ino)) {
50                 f2fs_msg(inode->i_sb, KERN_ERR, "bad inode number: %lu",
51                          (unsigned long) inode->i_ino);
52                 return -EINVAL;
53         }
54
55         node_page = get_node_page(sbi, inode->i_ino);
56         if (IS_ERR(node_page))
57                 return PTR_ERR(node_page);
58
59         rn = page_address(node_page);
60         ri = &(rn->i);
61
62         inode->i_mode = le16_to_cpu(ri->i_mode);
63         i_uid_write(inode, le32_to_cpu(ri->i_uid));
64         i_gid_write(inode, le32_to_cpu(ri->i_gid));
65         set_nlink(inode, le32_to_cpu(ri->i_links));
66         inode->i_size = le64_to_cpu(ri->i_size);
67         inode->i_blocks = le64_to_cpu(ri->i_blocks);
68
69         inode->i_atime.tv_sec = le64_to_cpu(ri->i_atime);
70         inode->i_ctime.tv_sec = le64_to_cpu(ri->i_ctime);
71         inode->i_mtime.tv_sec = le64_to_cpu(ri->i_mtime);
72         inode->i_atime.tv_nsec = le32_to_cpu(ri->i_atime_nsec);
73         inode->i_ctime.tv_nsec = le32_to_cpu(ri->i_ctime_nsec);
74         inode->i_mtime.tv_nsec = le32_to_cpu(ri->i_mtime_nsec);
75         inode->i_generation = le32_to_cpu(ri->i_generation);
76         if (ri->i_addr[0])
77                 inode->i_rdev = old_decode_dev(le32_to_cpu(ri->i_addr[0]));
78         else
79                 inode->i_rdev = new_decode_dev(le32_to_cpu(ri->i_addr[1]));
80
81         fi->i_current_depth = le32_to_cpu(ri->i_current_depth);
82         fi->i_xattr_nid = le32_to_cpu(ri->i_xattr_nid);
83         fi->i_flags = le32_to_cpu(ri->i_flags);
84         fi->flags = 0;
85         fi->i_advise = ri->i_advise;
86         fi->i_pino = le32_to_cpu(ri->i_pino);
87         get_extent_info(&fi->ext, ri->i_ext);
88         f2fs_put_page(node_page, 1);
89         return 0;
90 }
91
92 struct inode *f2fs_iget(struct super_block *sb, unsigned long ino)
93 {
94         struct f2fs_sb_info *sbi = F2FS_SB(sb);
95         struct inode *inode;
96         int ret = 0;
97
98         inode = iget_locked(sb, ino);
99         if (!inode)
100                 return ERR_PTR(-ENOMEM);
101
102         if (!(inode->i_state & I_NEW)) {
103                 trace_f2fs_iget(inode);
104                 return inode;
105         }
106         if (ino == F2FS_NODE_INO(sbi) || ino == F2FS_META_INO(sbi))
107                 goto make_now;
108
109         ret = do_read_inode(inode);
110         if (ret)
111                 goto bad_inode;
112 make_now:
113         if (ino == F2FS_NODE_INO(sbi)) {
114                 inode->i_mapping->a_ops = &f2fs_node_aops;
115                 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO);
116         } else if (ino == F2FS_META_INO(sbi)) {
117                 inode->i_mapping->a_ops = &f2fs_meta_aops;
118                 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO);
119         } else if (S_ISREG(inode->i_mode)) {
120                 inode->i_op = &f2fs_file_inode_operations;
121                 inode->i_fop = &f2fs_file_operations;
122                 inode->i_mapping->a_ops = &f2fs_dblock_aops;
123         } else if (S_ISDIR(inode->i_mode)) {
124                 inode->i_op = &f2fs_dir_inode_operations;
125                 inode->i_fop = &f2fs_dir_operations;
126                 inode->i_mapping->a_ops = &f2fs_dblock_aops;
127                 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO);
128         } else if (S_ISLNK(inode->i_mode)) {
129                 inode->i_op = &f2fs_symlink_inode_operations;
130                 inode->i_mapping->a_ops = &f2fs_dblock_aops;
131         } else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) ||
132                         S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) {
133                 inode->i_op = &f2fs_special_inode_operations;
134                 init_special_inode(inode, inode->i_mode, inode->i_rdev);
135         } else {
136                 ret = -EIO;
137                 goto bad_inode;
138         }
139         unlock_new_inode(inode);
140         trace_f2fs_iget(inode);
141         return inode;
142
143 bad_inode:
144         iget_failed(inode);
145         trace_f2fs_iget_exit(inode, ret);
146         return ERR_PTR(ret);
147 }
148
149 void update_inode(struct inode *inode, struct page *node_page)
150 {
151         struct f2fs_node *rn;
152         struct f2fs_inode *ri;
153
154         wait_on_page_writeback(node_page);
155
156         rn = page_address(node_page);
157         ri = &(rn->i);
158
159         ri->i_mode = cpu_to_le16(inode->i_mode);
160         ri->i_advise = F2FS_I(inode)->i_advise;
161         ri->i_uid = cpu_to_le32(i_uid_read(inode));
162         ri->i_gid = cpu_to_le32(i_gid_read(inode));
163         ri->i_links = cpu_to_le32(inode->i_nlink);
164         ri->i_size = cpu_to_le64(i_size_read(inode));
165         ri->i_blocks = cpu_to_le64(inode->i_blocks);
166         set_raw_extent(&F2FS_I(inode)->ext, &ri->i_ext);
167
168         ri->i_atime = cpu_to_le64(inode->i_atime.tv_sec);
169         ri->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
170         ri->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec);
171         ri->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
172         ri->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
173         ri->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec);
174         ri->i_current_depth = cpu_to_le32(F2FS_I(inode)->i_current_depth);
175         ri->i_xattr_nid = cpu_to_le32(F2FS_I(inode)->i_xattr_nid);
176         ri->i_flags = cpu_to_le32(F2FS_I(inode)->i_flags);
177         ri->i_pino = cpu_to_le32(F2FS_I(inode)->i_pino);
178         ri->i_generation = cpu_to_le32(inode->i_generation);
179
180         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
181                 if (old_valid_dev(inode->i_rdev)) {
182                         ri->i_addr[0] =
183                                 cpu_to_le32(old_encode_dev(inode->i_rdev));
184                         ri->i_addr[1] = 0;
185                 } else {
186                         ri->i_addr[0] = 0;
187                         ri->i_addr[1] =
188                                 cpu_to_le32(new_encode_dev(inode->i_rdev));
189                         ri->i_addr[2] = 0;
190                 }
191         }
192
193         set_cold_node(inode, node_page);
194         set_page_dirty(node_page);
195         clear_inode_flag(F2FS_I(inode), FI_DIRTY_INODE);
196 }
197
198 int update_inode_page(struct inode *inode)
199 {
200         struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
201         struct page *node_page;
202
203         node_page = get_node_page(sbi, inode->i_ino);
204         if (IS_ERR(node_page))
205                 return PTR_ERR(node_page);
206
207         update_inode(inode, node_page);
208         f2fs_put_page(node_page, 1);
209         return 0;
210 }
211
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 (!is_inode_flag_set(F2FS_I(inode), FI_DIRTY_INODE))
222                 return 0;
223
224         if (wbc)
225                 f2fs_balance_fs(sbi);
226
227         /*
228          * We need to lock here to prevent from producing dirty node pages
229          * during the urgent cleaning time when runing out of free sections.
230          */
231         ilock = mutex_lock_op(sbi);
232         ret = update_inode_page(inode);
233         mutex_unlock_op(sbi, ilock);
234         return ret;
235 }
236
237 /*
238  * Called at the last iput() if i_nlink is zero
239  */
240 void f2fs_evict_inode(struct inode *inode)
241 {
242         struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
243         int ilock;
244
245         trace_f2fs_evict_inode(inode);
246         truncate_inode_pages(&inode->i_data, 0);
247
248         if (inode->i_ino == F2FS_NODE_INO(sbi) ||
249                         inode->i_ino == F2FS_META_INO(sbi))
250                 goto no_delete;
251
252         BUG_ON(atomic_read(&F2FS_I(inode)->dirty_dents));
253         remove_dirty_dir_inode(inode);
254
255         if (inode->i_nlink || is_bad_inode(inode))
256                 goto no_delete;
257
258         sb_start_intwrite(inode->i_sb);
259         set_inode_flag(F2FS_I(inode), FI_NO_ALLOC);
260         i_size_write(inode, 0);
261
262         if (F2FS_HAS_BLOCKS(inode))
263                 f2fs_truncate(inode);
264
265         ilock = mutex_lock_op(sbi);
266         remove_inode_page(inode);
267         mutex_unlock_op(sbi, ilock);
268
269         sb_end_intwrite(inode->i_sb);
270 no_delete:
271         clear_inode(inode);
272 }