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Jaegeuk Kim0a8165d2012-11-29 13:28:09 +09001/*
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +09002 * 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
Namjae Jeona2a4a7e2013-04-20 01:28:40 +090019#include <trace/events/f2fs.h>
20
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +090021void 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
Jaegeuk Kim3d1e3802013-10-08 18:01:51 +090040static void __get_inode_rdev(struct inode *inode, struct f2fs_inode *ri)
41{
42 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) ||
43 S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) {
44 if (ri->i_addr[0])
45 inode->i_rdev = old_decode_dev(le32_to_cpu(ri->i_addr[0]));
46 else
47 inode->i_rdev = new_decode_dev(le32_to_cpu(ri->i_addr[1]));
48 }
49}
50
51static void __set_inode_rdev(struct inode *inode, struct f2fs_inode *ri)
52{
53 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
54 if (old_valid_dev(inode->i_rdev)) {
55 ri->i_addr[0] = cpu_to_le32(old_encode_dev(inode->i_rdev));
56 ri->i_addr[1] = 0;
57 } else {
58 ri->i_addr[0] = 0;
59 ri->i_addr[1] = cpu_to_le32(new_encode_dev(inode->i_rdev));
60 ri->i_addr[2] = 0;
61 }
62 }
63}
64
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +090065static int do_read_inode(struct inode *inode)
66{
67 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
68 struct f2fs_inode_info *fi = F2FS_I(inode);
69 struct page *node_page;
70 struct f2fs_node *rn;
71 struct f2fs_inode *ri;
72
73 /* Check if ino is within scope */
Namjae Jeon064e0822013-03-17 17:27:20 +090074 if (check_nid_range(sbi, inode->i_ino)) {
75 f2fs_msg(inode->i_sb, KERN_ERR, "bad inode number: %lu",
76 (unsigned long) inode->i_ino);
77 return -EINVAL;
78 }
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +090079
80 node_page = get_node_page(sbi, inode->i_ino);
81 if (IS_ERR(node_page))
82 return PTR_ERR(node_page);
83
Gu Zheng45590712013-07-15 17:57:38 +080084 rn = F2FS_NODE(node_page);
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +090085 ri = &(rn->i);
86
87 inode->i_mode = le16_to_cpu(ri->i_mode);
88 i_uid_write(inode, le32_to_cpu(ri->i_uid));
89 i_gid_write(inode, le32_to_cpu(ri->i_gid));
90 set_nlink(inode, le32_to_cpu(ri->i_links));
91 inode->i_size = le64_to_cpu(ri->i_size);
92 inode->i_blocks = le64_to_cpu(ri->i_blocks);
93
94 inode->i_atime.tv_sec = le64_to_cpu(ri->i_atime);
95 inode->i_ctime.tv_sec = le64_to_cpu(ri->i_ctime);
96 inode->i_mtime.tv_sec = le64_to_cpu(ri->i_mtime);
97 inode->i_atime.tv_nsec = le32_to_cpu(ri->i_atime_nsec);
98 inode->i_ctime.tv_nsec = le32_to_cpu(ri->i_ctime_nsec);
99 inode->i_mtime.tv_nsec = le32_to_cpu(ri->i_mtime_nsec);
100 inode->i_generation = le32_to_cpu(ri->i_generation);
101
102 fi->i_current_depth = le32_to_cpu(ri->i_current_depth);
103 fi->i_xattr_nid = le32_to_cpu(ri->i_xattr_nid);
104 fi->i_flags = le32_to_cpu(ri->i_flags);
105 fi->flags = 0;
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +0900106 fi->i_advise = ri->i_advise;
Jaegeuk Kim6666e6a2012-12-10 17:52:48 +0900107 fi->i_pino = le32_to_cpu(ri->i_pino);
Jaegeuk Kim3d1e3802013-10-08 18:01:51 +0900108
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +0900109 get_extent_info(&fi->ext, ri->i_ext);
Jaegeuk Kim444c5802013-08-08 15:16:22 +0900110 get_inline_info(fi, ri);
Jaegeuk Kim3d1e3802013-10-08 18:01:51 +0900111
112 /* get rdev by using inline_info */
113 __get_inode_rdev(inode, ri);
114
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +0900115 f2fs_put_page(node_page, 1);
116 return 0;
117}
118
119struct inode *f2fs_iget(struct super_block *sb, unsigned long ino)
120{
121 struct f2fs_sb_info *sbi = F2FS_SB(sb);
122 struct inode *inode;
Namjae Jeona2a4a7e2013-04-20 01:28:40 +0900123 int ret = 0;
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +0900124
125 inode = iget_locked(sb, ino);
126 if (!inode)
127 return ERR_PTR(-ENOMEM);
Namjae Jeona2a4a7e2013-04-20 01:28:40 +0900128
129 if (!(inode->i_state & I_NEW)) {
130 trace_f2fs_iget(inode);
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +0900131 return inode;
Namjae Jeona2a4a7e2013-04-20 01:28:40 +0900132 }
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +0900133 if (ino == F2FS_NODE_INO(sbi) || ino == F2FS_META_INO(sbi))
134 goto make_now;
135
136 ret = do_read_inode(inode);
137 if (ret)
138 goto bad_inode;
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +0900139make_now:
140 if (ino == F2FS_NODE_INO(sbi)) {
141 inode->i_mapping->a_ops = &f2fs_node_aops;
142 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO);
143 } else if (ino == F2FS_META_INO(sbi)) {
144 inode->i_mapping->a_ops = &f2fs_meta_aops;
145 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO);
146 } else if (S_ISREG(inode->i_mode)) {
147 inode->i_op = &f2fs_file_inode_operations;
148 inode->i_fop = &f2fs_file_operations;
149 inode->i_mapping->a_ops = &f2fs_dblock_aops;
150 } else if (S_ISDIR(inode->i_mode)) {
151 inode->i_op = &f2fs_dir_inode_operations;
152 inode->i_fop = &f2fs_dir_operations;
153 inode->i_mapping->a_ops = &f2fs_dblock_aops;
Jaegeuk Kim6f85b352013-05-20 16:15:22 +0900154 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO);
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +0900155 } 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);
162 } else {
163 ret = -EIO;
164 goto bad_inode;
165 }
166 unlock_new_inode(inode);
Namjae Jeona2a4a7e2013-04-20 01:28:40 +0900167 trace_f2fs_iget(inode);
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +0900168 return inode;
169
170bad_inode:
171 iget_failed(inode);
Namjae Jeona2a4a7e2013-04-20 01:28:40 +0900172 trace_f2fs_iget_exit(inode, ret);
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +0900173 return ERR_PTR(ret);
174}
175
176void update_inode(struct inode *inode, struct page *node_page)
177{
178 struct f2fs_node *rn;
179 struct f2fs_inode *ri;
180
Jin Xua5694692013-08-05 20:02:04 +0800181 f2fs_wait_on_page_writeback(node_page, NODE, false);
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +0900182
Gu Zheng45590712013-07-15 17:57:38 +0800183 rn = F2FS_NODE(node_page);
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +0900184 ri = &(rn->i);
185
186 ri->i_mode = cpu_to_le16(inode->i_mode);
187 ri->i_advise = F2FS_I(inode)->i_advise;
188 ri->i_uid = cpu_to_le32(i_uid_read(inode));
189 ri->i_gid = cpu_to_le32(i_gid_read(inode));
190 ri->i_links = cpu_to_le32(inode->i_nlink);
191 ri->i_size = cpu_to_le64(i_size_read(inode));
192 ri->i_blocks = cpu_to_le64(inode->i_blocks);
193 set_raw_extent(&F2FS_I(inode)->ext, &ri->i_ext);
Jaegeuk Kim444c5802013-08-08 15:16:22 +0900194 set_raw_inline(F2FS_I(inode), ri);
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +0900195
196 ri->i_atime = cpu_to_le64(inode->i_atime.tv_sec);
197 ri->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
198 ri->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec);
199 ri->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
200 ri->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
201 ri->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec);
202 ri->i_current_depth = cpu_to_le32(F2FS_I(inode)->i_current_depth);
203 ri->i_xattr_nid = cpu_to_le32(F2FS_I(inode)->i_xattr_nid);
204 ri->i_flags = cpu_to_le32(F2FS_I(inode)->i_flags);
Jaegeuk Kim6666e6a2012-12-10 17:52:48 +0900205 ri->i_pino = cpu_to_le32(F2FS_I(inode)->i_pino);
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +0900206 ri->i_generation = cpu_to_le32(inode->i_generation);
Changman Lee7d79e752013-01-23 09:40:23 +0900207
Jaegeuk Kim3d1e3802013-10-08 18:01:51 +0900208 __set_inode_rdev(inode, ri);
Jaegeuk Kim398b1ac2012-12-19 15:28:39 +0900209 set_cold_node(inode, node_page);
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +0900210 set_page_dirty(node_page);
Jaegeuk Kim3d1e3802013-10-08 18:01:51 +0900211
Jaegeuk Kimb3783872013-06-10 09:17:01 +0900212 clear_inode_flag(F2FS_I(inode), FI_DIRTY_INODE);
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +0900213}
214
Jaegeuk Kim39936832012-11-22 16:21:29 +0900215int update_inode_page(struct inode *inode)
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +0900216{
217 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
218 struct page *node_page;
Jaegeuk Kim39936832012-11-22 16:21:29 +0900219
220 node_page = get_node_page(sbi, inode->i_ino);
221 if (IS_ERR(node_page))
222 return PTR_ERR(node_page);
223
224 update_inode(inode, node_page);
225 f2fs_put_page(node_page, 1);
226 return 0;
227}
228
229int f2fs_write_inode(struct inode *inode, struct writeback_control *wbc)
230{
231 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
Gu Zhenge4795562013-09-27 18:08:30 +0800232 int ret;
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +0900233
234 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
235 inode->i_ino == F2FS_META_INO(sbi))
236 return 0;
237
Jaegeuk Kimb3783872013-06-10 09:17:01 +0900238 if (!is_inode_flag_set(F2FS_I(inode), FI_DIRTY_INODE))
239 return 0;
240
Jaegeuk Kim39936832012-11-22 16:21:29 +0900241 /*
242 * We need to lock here to prevent from producing dirty node pages
243 * during the urgent cleaning time when runing out of free sections.
244 */
Gu Zhenge4795562013-09-27 18:08:30 +0800245 f2fs_lock_op(sbi);
Jaegeuk Kim39936832012-11-22 16:21:29 +0900246 ret = update_inode_page(inode);
Gu Zhenge4795562013-09-27 18:08:30 +0800247 f2fs_unlock_op(sbi);
Jin Xu92c43422013-08-15 19:17:01 +0800248
249 if (wbc)
250 f2fs_balance_fs(sbi);
251
Jaegeuk Kim39936832012-11-22 16:21:29 +0900252 return ret;
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +0900253}
254
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +0900255/*
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +0900256 * Called at the last iput() if i_nlink is zero
257 */
258void f2fs_evict_inode(struct inode *inode)
259{
260 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
261
Namjae Jeona2a4a7e2013-04-20 01:28:40 +0900262 trace_f2fs_evict_inode(inode);
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +0900263 truncate_inode_pages(&inode->i_data, 0);
264
265 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
266 inode->i_ino == F2FS_META_INO(sbi))
267 goto no_delete;
268
Jaegeuk Kim5d56b672013-10-29 15:14:54 +0900269 f2fs_bug_on(atomic_read(&F2FS_I(inode)->dirty_dents));
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +0900270 remove_dirty_dir_inode(inode);
271
272 if (inode->i_nlink || is_bad_inode(inode))
273 goto no_delete;
274
Changman Leed6212a52013-01-29 18:30:07 +0900275 sb_start_intwrite(inode->i_sb);
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +0900276 set_inode_flag(F2FS_I(inode), FI_NO_ALLOC);
277 i_size_write(inode, 0);
278
279 if (F2FS_HAS_BLOCKS(inode))
280 f2fs_truncate(inode);
281
Gu Zhenge4795562013-09-27 18:08:30 +0800282 f2fs_lock_op(sbi);
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +0900283 remove_inode_page(inode);
Gu Zhenge4795562013-09-27 18:08:30 +0800284 f2fs_unlock_op(sbi);
Jaegeuk Kim39936832012-11-22 16:21:29 +0900285
Changman Leed6212a52013-01-29 18:30:07 +0900286 sb_end_intwrite(inode->i_sb);
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +0900287no_delete:
288 clear_inode(inode);
289}