blob: 2b2d45d19e3ea1e1101ff893a2ce9e0f19e607ea [file] [log] [blame]
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 Kim19f99ce2012-11-02 17:10:40 +090040static 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 */
Namjae Jeon064e0822013-03-17 17:27:20 +090049 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 }
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +090054
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);
Changman Lee7d79e752013-01-23 09:40:23 +090076 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]));
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +090080
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;
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +090085 fi->i_advise = ri->i_advise;
Jaegeuk Kim6666e6a2012-12-10 17:52:48 +090086 fi->i_pino = le32_to_cpu(ri->i_pino);
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +090087 get_extent_info(&fi->ext, ri->i_ext);
88 f2fs_put_page(node_page, 1);
89 return 0;
90}
91
92struct inode *f2fs_iget(struct super_block *sb, unsigned long ino)
93{
94 struct f2fs_sb_info *sbi = F2FS_SB(sb);
95 struct inode *inode;
Namjae Jeona2a4a7e2013-04-20 01:28:40 +090096 int ret = 0;
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +090097
98 inode = iget_locked(sb, ino);
99 if (!inode)
100 return ERR_PTR(-ENOMEM);
Namjae Jeona2a4a7e2013-04-20 01:28:40 +0900101
102 if (!(inode->i_state & I_NEW)) {
103 trace_f2fs_iget(inode);
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +0900104 return inode;
Namjae Jeona2a4a7e2013-04-20 01:28:40 +0900105 }
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +0900106 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;
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +0900112make_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;
Jaegeuk Kim6f85b352013-05-20 16:15:22 +0900127 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO);
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +0900128 } 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);
Namjae Jeona2a4a7e2013-04-20 01:28:40 +0900140 trace_f2fs_iget(inode);
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +0900141 return inode;
142
143bad_inode:
144 iget_failed(inode);
Namjae Jeona2a4a7e2013-04-20 01:28:40 +0900145 trace_f2fs_iget_exit(inode, ret);
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +0900146 return ERR_PTR(ret);
147}
148
149void 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);
Jaegeuk Kim6666e6a2012-12-10 17:52:48 +0900177 ri->i_pino = cpu_to_le32(F2FS_I(inode)->i_pino);
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +0900178 ri->i_generation = cpu_to_le32(inode->i_generation);
Changman Lee7d79e752013-01-23 09:40:23 +0900179
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
Jaegeuk Kim398b1ac2012-12-19 15:28:39 +0900193 set_cold_node(inode, node_page);
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +0900194 set_page_dirty(node_page);
Jaegeuk Kimb3783872013-06-10 09:17:01 +0900195 clear_inode_flag(F2FS_I(inode), FI_DIRTY_INODE);
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +0900196}
197
Jaegeuk Kim39936832012-11-22 16:21:29 +0900198int update_inode_page(struct inode *inode)
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +0900199{
200 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
201 struct page *node_page;
Jaegeuk Kim39936832012-11-22 16:21:29 +0900202
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
212int 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;
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +0900216
217 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
218 inode->i_ino == F2FS_META_INO(sbi))
219 return 0;
220
Jaegeuk Kimb3783872013-06-10 09:17:01 +0900221 if (!is_inode_flag_set(F2FS_I(inode), FI_DIRTY_INODE))
222 return 0;
223
Jaegeuk Kim7d82db82013-01-11 13:10:49 +0900224 if (wbc)
225 f2fs_balance_fs(sbi);
226
Jaegeuk Kim39936832012-11-22 16:21:29 +0900227 /*
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;
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +0900235}
236
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +0900237/*
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +0900238 * Called at the last iput() if i_nlink is zero
239 */
240void f2fs_evict_inode(struct inode *inode)
241{
242 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
Jaegeuk Kim39936832012-11-22 16:21:29 +0900243 int ilock;
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +0900244
Namjae Jeona2a4a7e2013-04-20 01:28:40 +0900245 trace_f2fs_evict_inode(inode);
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +0900246 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
Changman Leed6212a52013-01-29 18:30:07 +0900258 sb_start_intwrite(inode->i_sb);
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +0900259 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
Jaegeuk Kim39936832012-11-22 16:21:29 +0900265 ilock = mutex_lock_op(sbi);
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +0900266 remove_inode_page(inode);
Jaegeuk Kim39936832012-11-22 16:21:29 +0900267 mutex_unlock_op(sbi, ilock);
268
Changman Leed6212a52013-01-29 18:30:07 +0900269 sb_end_intwrite(inode->i_sb);
Jaegeuk Kim19f99ce2012-11-02 17:10:40 +0900270no_delete:
271 clear_inode(inode);
272}