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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/backing-dev.h>
15#include <linux/writeback.h>
16
17#include "f2fs.h"
18#include "node.h"
19
20#include <trace/events/f2fs.h>
21
22void f2fs_mark_inode_dirty_sync(struct inode *inode, bool sync)
23{
24 if (f2fs_inode_dirtied(inode, sync))
25 return;
26
27 mark_inode_dirty_sync(inode);
28}
29
30void f2fs_set_inode_flags(struct inode *inode)
31{
32 unsigned int flags = F2FS_I(inode)->i_flags;
33 unsigned int new_fl = 0;
34
35 if (flags & FS_SYNC_FL)
36 new_fl |= S_SYNC;
37 if (flags & FS_APPEND_FL)
38 new_fl |= S_APPEND;
39 if (flags & FS_IMMUTABLE_FL)
40 new_fl |= S_IMMUTABLE;
41 if (flags & FS_NOATIME_FL)
42 new_fl |= S_NOATIME;
43 if (flags & FS_DIRSYNC_FL)
44 new_fl |= S_DIRSYNC;
45 inode_set_flags(inode, new_fl,
46 S_SYNC|S_APPEND|S_IMMUTABLE|S_NOATIME|S_DIRSYNC);
47 f2fs_mark_inode_dirty_sync(inode, false);
48}
49
50static void __get_inode_rdev(struct inode *inode, struct f2fs_inode *ri)
51{
52 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) ||
53 S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) {
54 if (ri->i_addr[0])
55 inode->i_rdev =
56 old_decode_dev(le32_to_cpu(ri->i_addr[0]));
57 else
58 inode->i_rdev =
59 new_decode_dev(le32_to_cpu(ri->i_addr[1]));
60 }
61}
62
63static bool __written_first_block(struct f2fs_inode *ri)
64{
65 block_t addr = le32_to_cpu(ri->i_addr[0]);
66
67 if (addr != NEW_ADDR && addr != NULL_ADDR)
68 return true;
69 return false;
70}
71
72static void __set_inode_rdev(struct inode *inode, struct f2fs_inode *ri)
73{
74 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
75 if (old_valid_dev(inode->i_rdev)) {
76 ri->i_addr[0] =
77 cpu_to_le32(old_encode_dev(inode->i_rdev));
78 ri->i_addr[1] = 0;
79 } else {
80 ri->i_addr[0] = 0;
81 ri->i_addr[1] =
82 cpu_to_le32(new_encode_dev(inode->i_rdev));
83 ri->i_addr[2] = 0;
84 }
85 }
86}
87
88static void __recover_inline_status(struct inode *inode, struct page *ipage)
89{
90 void *inline_data = inline_data_addr(ipage);
91 __le32 *start = inline_data;
92 __le32 *end = start + MAX_INLINE_DATA / sizeof(__le32);
93
94 while (start < end) {
95 if (*start++) {
96 f2fs_wait_on_page_writeback(ipage, NODE, true);
97
98 set_inode_flag(inode, FI_DATA_EXIST);
99 set_raw_inline(inode, F2FS_INODE(ipage));
100 set_page_dirty(ipage);
101 return;
102 }
103 }
104 return;
105}
106
107static int do_read_inode(struct inode *inode)
108{
109 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
110 struct f2fs_inode_info *fi = F2FS_I(inode);
111 struct page *node_page;
112 struct f2fs_inode *ri;
113
114 /* Check if ino is within scope */
115 if (check_nid_range(sbi, inode->i_ino)) {
116 f2fs_msg(inode->i_sb, KERN_ERR, "bad inode number: %lu",
117 (unsigned long) inode->i_ino);
118 WARN_ON(1);
119 return -EINVAL;
120 }
121
122 node_page = get_node_page(sbi, inode->i_ino);
123 if (IS_ERR(node_page))
124 return PTR_ERR(node_page);
125
126 ri = F2FS_INODE(node_page);
127
128 inode->i_mode = le16_to_cpu(ri->i_mode);
129 i_uid_write(inode, le32_to_cpu(ri->i_uid));
130 i_gid_write(inode, le32_to_cpu(ri->i_gid));
131 set_nlink(inode, le32_to_cpu(ri->i_links));
132 inode->i_size = le64_to_cpu(ri->i_size);
133 inode->i_blocks = le64_to_cpu(ri->i_blocks);
134
135 inode->i_atime.tv_sec = le64_to_cpu(ri->i_atime);
136 inode->i_ctime.tv_sec = le64_to_cpu(ri->i_ctime);
137 inode->i_mtime.tv_sec = le64_to_cpu(ri->i_mtime);
138 inode->i_atime.tv_nsec = le32_to_cpu(ri->i_atime_nsec);
139 inode->i_ctime.tv_nsec = le32_to_cpu(ri->i_ctime_nsec);
140 inode->i_mtime.tv_nsec = le32_to_cpu(ri->i_mtime_nsec);
141 inode->i_generation = le32_to_cpu(ri->i_generation);
142
143 fi->i_current_depth = le32_to_cpu(ri->i_current_depth);
144 fi->i_xattr_nid = le32_to_cpu(ri->i_xattr_nid);
145 fi->i_flags = le32_to_cpu(ri->i_flags);
146 fi->flags = 0;
147 fi->i_advise = ri->i_advise;
148 fi->i_pino = le32_to_cpu(ri->i_pino);
149 fi->i_dir_level = ri->i_dir_level;
150
151 if (f2fs_init_extent_tree(inode, &ri->i_ext))
152 set_page_dirty(node_page);
153
154 get_inline_info(inode, ri);
155
156 /* check data exist */
157 if (f2fs_has_inline_data(inode) && !f2fs_exist_data(inode))
158 __recover_inline_status(inode, node_page);
159
160 /* get rdev by using inline_info */
161 __get_inode_rdev(inode, ri);
162
163 if (__written_first_block(ri))
164 set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN);
165
166 if (!need_inode_block_update(sbi, inode->i_ino))
167 fi->last_disk_size = inode->i_size;
168
169 f2fs_put_page(node_page, 1);
170
171 stat_inc_inline_xattr(inode);
172 stat_inc_inline_inode(inode);
173 stat_inc_inline_dir(inode);
174
175 return 0;
176}
177
178struct inode *f2fs_iget(struct super_block *sb, unsigned long ino)
179{
180 struct f2fs_sb_info *sbi = F2FS_SB(sb);
181 struct inode *inode;
182 int ret = 0;
183
184 inode = iget_locked(sb, ino);
185 if (!inode)
186 return ERR_PTR(-ENOMEM);
187
188 if (!(inode->i_state & I_NEW)) {
189 trace_f2fs_iget(inode);
190 return inode;
191 }
192 if (ino == F2FS_NODE_INO(sbi) || ino == F2FS_META_INO(sbi))
193 goto make_now;
194
195 ret = do_read_inode(inode);
196 if (ret)
197 goto bad_inode;
198make_now:
199 if (ino == F2FS_NODE_INO(sbi)) {
200 inode->i_mapping->a_ops = &f2fs_node_aops;
201 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO);
202 } else if (ino == F2FS_META_INO(sbi)) {
203 inode->i_mapping->a_ops = &f2fs_meta_aops;
204 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO);
205 } else if (S_ISREG(inode->i_mode)) {
206 inode->i_op = &f2fs_file_inode_operations;
207 inode->i_fop = &f2fs_file_operations;
208 inode->i_mapping->a_ops = &f2fs_dblock_aops;
209 } else if (S_ISDIR(inode->i_mode)) {
210 inode->i_op = &f2fs_dir_inode_operations;
211 inode->i_fop = &f2fs_dir_operations;
212 inode->i_mapping->a_ops = &f2fs_dblock_aops;
213 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO);
214 } else if (S_ISLNK(inode->i_mode)) {
215 if (f2fs_encrypted_inode(inode))
216 inode->i_op = &f2fs_encrypted_symlink_inode_operations;
217 else
218 inode->i_op = &f2fs_symlink_inode_operations;
219 inode_nohighmem(inode);
220 inode->i_mapping->a_ops = &f2fs_dblock_aops;
221 } else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) ||
222 S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) {
223 inode->i_op = &f2fs_special_inode_operations;
224 init_special_inode(inode, inode->i_mode, inode->i_rdev);
225 } else {
226 ret = -EIO;
227 goto bad_inode;
228 }
229 unlock_new_inode(inode);
230 trace_f2fs_iget(inode);
231 return inode;
232
233bad_inode:
234 iget_failed(inode);
235 trace_f2fs_iget_exit(inode, ret);
236 return ERR_PTR(ret);
237}
238
239struct inode *f2fs_iget_retry(struct super_block *sb, unsigned long ino)
240{
241 struct inode *inode;
242retry:
243 inode = f2fs_iget(sb, ino);
244 if (IS_ERR(inode)) {
245 if (PTR_ERR(inode) == -ENOMEM) {
246 congestion_wait(BLK_RW_ASYNC, HZ/50);
247 goto retry;
248 }
249 }
250 return inode;
251}
252
253int update_inode(struct inode *inode, struct page *node_page)
254{
255 struct f2fs_inode *ri;
256 struct extent_tree *et = F2FS_I(inode)->extent_tree;
257
258 f2fs_inode_synced(inode);
259
260 f2fs_wait_on_page_writeback(node_page, NODE, true);
261
262 ri = F2FS_INODE(node_page);
263
264 ri->i_mode = cpu_to_le16(inode->i_mode);
265 ri->i_advise = F2FS_I(inode)->i_advise;
266 ri->i_uid = cpu_to_le32(i_uid_read(inode));
267 ri->i_gid = cpu_to_le32(i_gid_read(inode));
268 ri->i_links = cpu_to_le32(inode->i_nlink);
269 ri->i_size = cpu_to_le64(i_size_read(inode));
270 ri->i_blocks = cpu_to_le64(inode->i_blocks);
271
272 if (et) {
273 read_lock(&et->lock);
274 set_raw_extent(&et->largest, &ri->i_ext);
275 read_unlock(&et->lock);
276 } else {
277 memset(&ri->i_ext, 0, sizeof(ri->i_ext));
278 }
279 set_raw_inline(inode, ri);
280
281 ri->i_atime = cpu_to_le64(inode->i_atime.tv_sec);
282 ri->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
283 ri->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec);
284 ri->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
285 ri->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
286 ri->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec);
287 ri->i_current_depth = cpu_to_le32(F2FS_I(inode)->i_current_depth);
288 ri->i_xattr_nid = cpu_to_le32(F2FS_I(inode)->i_xattr_nid);
289 ri->i_flags = cpu_to_le32(F2FS_I(inode)->i_flags);
290 ri->i_pino = cpu_to_le32(F2FS_I(inode)->i_pino);
291 ri->i_generation = cpu_to_le32(inode->i_generation);
292 ri->i_dir_level = F2FS_I(inode)->i_dir_level;
293
294 __set_inode_rdev(inode, ri);
295 set_cold_node(inode, node_page);
296
297 /* deleted inode */
298 if (inode->i_nlink == 0)
299 clear_inline_node(node_page);
300
301 return set_page_dirty(node_page);
302}
303
304int update_inode_page(struct inode *inode)
305{
306 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
307 struct page *node_page;
308 int ret = 0;
309retry:
310 node_page = get_node_page(sbi, inode->i_ino);
311 if (IS_ERR(node_page)) {
312 int err = PTR_ERR(node_page);
313 if (err == -ENOMEM) {
314 cond_resched();
315 goto retry;
316 } else if (err != -ENOENT) {
317 f2fs_stop_checkpoint(sbi, false);
318 }
319 f2fs_inode_synced(inode);
320 return 0;
321 }
322 ret = update_inode(inode, node_page);
323 f2fs_put_page(node_page, 1);
324 return ret;
325}
326
327int f2fs_write_inode(struct inode *inode, struct writeback_control *wbc)
328{
329 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
330
331 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
332 inode->i_ino == F2FS_META_INO(sbi))
333 return 0;
334
335 if (!is_inode_flag_set(inode, FI_DIRTY_INODE))
336 return 0;
337
338 /*
339 * We need to balance fs here to prevent from producing dirty node pages
340 * during the urgent cleaning time when runing out of free sections.
341 */
342 if (update_inode_page(inode) && wbc && wbc->nr_to_write)
343 f2fs_balance_fs(sbi, true);
344 return 0;
345}
346
347/*
348 * Called at the last iput() if i_nlink is zero
349 */
350void f2fs_evict_inode(struct inode *inode)
351{
352 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
353 nid_t xnid = F2FS_I(inode)->i_xattr_nid;
354 int err = 0;
355
356 /* some remained atomic pages should discarded */
357 if (f2fs_is_atomic_file(inode))
358 drop_inmem_pages(inode);
359
360 trace_f2fs_evict_inode(inode);
361 truncate_inode_pages_final(&inode->i_data);
362
363 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
364 inode->i_ino == F2FS_META_INO(sbi))
365 goto out_clear;
366
367 f2fs_bug_on(sbi, get_dirty_pages(inode));
368 remove_dirty_inode(inode);
369
370 f2fs_destroy_extent_tree(inode);
371
372 if (inode->i_nlink || is_bad_inode(inode))
373 goto no_delete;
374
375#ifdef CONFIG_F2FS_FAULT_INJECTION
376 if (time_to_inject(sbi, FAULT_EVICT_INODE))
377 goto no_delete;
378#endif
379
380 remove_ino_entry(sbi, inode->i_ino, APPEND_INO);
381 remove_ino_entry(sbi, inode->i_ino, UPDATE_INO);
382
383 sb_start_intwrite(inode->i_sb);
384 set_inode_flag(inode, FI_NO_ALLOC);
385 i_size_write(inode, 0);
386retry:
387 if (F2FS_HAS_BLOCKS(inode))
388 err = f2fs_truncate(inode);
389
390 if (!err) {
391 f2fs_lock_op(sbi);
392 err = remove_inode_page(inode);
393 f2fs_unlock_op(sbi);
394 if (err == -ENOENT)
395 err = 0;
396 }
397
398 /* give more chances, if ENOMEM case */
399 if (err == -ENOMEM) {
400 err = 0;
401 goto retry;
402 }
403
404 if (err)
405 update_inode_page(inode);
406 sb_end_intwrite(inode->i_sb);
407no_delete:
408 stat_dec_inline_xattr(inode);
409 stat_dec_inline_dir(inode);
410 stat_dec_inline_inode(inode);
411
412 invalidate_mapping_pages(NODE_MAPPING(sbi), inode->i_ino, inode->i_ino);
413 if (xnid)
414 invalidate_mapping_pages(NODE_MAPPING(sbi), xnid, xnid);
415 if (inode->i_nlink) {
416 if (is_inode_flag_set(inode, FI_APPEND_WRITE))
417 add_ino_entry(sbi, inode->i_ino, APPEND_INO);
418 if (is_inode_flag_set(inode, FI_UPDATE_WRITE))
419 add_ino_entry(sbi, inode->i_ino, UPDATE_INO);
420 }
421 if (is_inode_flag_set(inode, FI_FREE_NID)) {
422 alloc_nid_failed(sbi, inode->i_ino);
423 clear_inode_flag(inode, FI_FREE_NID);
424 }
425 f2fs_bug_on(sbi, err &&
426 !exist_written_data(sbi, inode->i_ino, ORPHAN_INO));
427out_clear:
428 fscrypt_put_encryption_info(inode, NULL);
429 clear_inode(inode);
430}
431
432/* caller should call f2fs_lock_op() */
433void handle_failed_inode(struct inode *inode)
434{
435 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
436 struct node_info ni;
437
438 /*
439 * clear nlink of inode in order to release resource of inode
440 * immediately.
441 */
442 clear_nlink(inode);
443
444 /*
445 * we must call this to avoid inode being remained as dirty, resulting
446 * in a panic when flushing dirty inodes in gdirty_list.
447 */
448 update_inode_page(inode);
449
450 /* don't make bad inode, since it becomes a regular file. */
451 unlock_new_inode(inode);
452
453 /*
454 * Note: we should add inode to orphan list before f2fs_unlock_op()
455 * so we can prevent losing this orphan when encoutering checkpoint
456 * and following suddenly power-off.
457 */
458 get_node_info(sbi, inode->i_ino, &ni);
459
460 if (ni.blk_addr != NULL_ADDR) {
461 int err = acquire_orphan_inode(sbi);
462 if (err) {
463 set_sbi_flag(sbi, SBI_NEED_FSCK);
464 f2fs_msg(sbi->sb, KERN_WARNING,
465 "Too many orphan inodes, run fsck to fix.");
466 } else {
467 add_orphan_inode(inode);
468 }
469 alloc_nid_done(sbi, inode->i_ino);
470 } else {
471 set_inode_flag(inode, FI_FREE_NID);
472 }
473
474 f2fs_unlock_op(sbi);
475
476 /* iput will drop the inode object */
477 iput(inode);
478}
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/backing-dev.h>
15#include <linux/writeback.h>
16
17#include "f2fs.h"
18#include "node.h"
19#include "segment.h"
20
21#include <trace/events/f2fs.h>
22
23void f2fs_mark_inode_dirty_sync(struct inode *inode, bool sync)
24{
25 if (is_inode_flag_set(inode, FI_NEW_INODE))
26 return;
27
28 if (f2fs_inode_dirtied(inode, sync))
29 return;
30
31 mark_inode_dirty_sync(inode);
32}
33
34void f2fs_set_inode_flags(struct inode *inode)
35{
36 unsigned int flags = F2FS_I(inode)->i_flags;
37 unsigned int new_fl = 0;
38
39 if (flags & FS_SYNC_FL)
40 new_fl |= S_SYNC;
41 if (flags & FS_APPEND_FL)
42 new_fl |= S_APPEND;
43 if (flags & FS_IMMUTABLE_FL)
44 new_fl |= S_IMMUTABLE;
45 if (flags & FS_NOATIME_FL)
46 new_fl |= S_NOATIME;
47 if (flags & FS_DIRSYNC_FL)
48 new_fl |= S_DIRSYNC;
49 if (f2fs_encrypted_inode(inode))
50 new_fl |= S_ENCRYPTED;
51 inode_set_flags(inode, new_fl,
52 S_SYNC|S_APPEND|S_IMMUTABLE|S_NOATIME|S_DIRSYNC|
53 S_ENCRYPTED);
54}
55
56static void __get_inode_rdev(struct inode *inode, struct f2fs_inode *ri)
57{
58 int extra_size = get_extra_isize(inode);
59
60 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) ||
61 S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) {
62 if (ri->i_addr[extra_size])
63 inode->i_rdev = old_decode_dev(
64 le32_to_cpu(ri->i_addr[extra_size]));
65 else
66 inode->i_rdev = new_decode_dev(
67 le32_to_cpu(ri->i_addr[extra_size + 1]));
68 }
69}
70
71static bool __written_first_block(struct f2fs_inode *ri)
72{
73 block_t addr = le32_to_cpu(ri->i_addr[offset_in_addr(ri)]);
74
75 if (addr != NEW_ADDR && addr != NULL_ADDR)
76 return true;
77 return false;
78}
79
80static void __set_inode_rdev(struct inode *inode, struct f2fs_inode *ri)
81{
82 int extra_size = get_extra_isize(inode);
83
84 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
85 if (old_valid_dev(inode->i_rdev)) {
86 ri->i_addr[extra_size] =
87 cpu_to_le32(old_encode_dev(inode->i_rdev));
88 ri->i_addr[extra_size + 1] = 0;
89 } else {
90 ri->i_addr[extra_size] = 0;
91 ri->i_addr[extra_size + 1] =
92 cpu_to_le32(new_encode_dev(inode->i_rdev));
93 ri->i_addr[extra_size + 2] = 0;
94 }
95 }
96}
97
98static void __recover_inline_status(struct inode *inode, struct page *ipage)
99{
100 void *inline_data = inline_data_addr(inode, ipage);
101 __le32 *start = inline_data;
102 __le32 *end = start + MAX_INLINE_DATA(inode) / sizeof(__le32);
103
104 while (start < end) {
105 if (*start++) {
106 f2fs_wait_on_page_writeback(ipage, NODE, true);
107
108 set_inode_flag(inode, FI_DATA_EXIST);
109 set_raw_inline(inode, F2FS_INODE(ipage));
110 set_page_dirty(ipage);
111 return;
112 }
113 }
114 return;
115}
116
117static bool f2fs_enable_inode_chksum(struct f2fs_sb_info *sbi, struct page *page)
118{
119 struct f2fs_inode *ri = &F2FS_NODE(page)->i;
120 int extra_isize = le32_to_cpu(ri->i_extra_isize);
121
122 if (!f2fs_sb_has_inode_chksum(sbi->sb))
123 return false;
124
125 if (!RAW_IS_INODE(F2FS_NODE(page)) || !(ri->i_inline & F2FS_EXTRA_ATTR))
126 return false;
127
128 if (!F2FS_FITS_IN_INODE(ri, extra_isize, i_inode_checksum))
129 return false;
130
131 return true;
132}
133
134static __u32 f2fs_inode_chksum(struct f2fs_sb_info *sbi, struct page *page)
135{
136 struct f2fs_node *node = F2FS_NODE(page);
137 struct f2fs_inode *ri = &node->i;
138 __le32 ino = node->footer.ino;
139 __le32 gen = ri->i_generation;
140 __u32 chksum, chksum_seed;
141 __u32 dummy_cs = 0;
142 unsigned int offset = offsetof(struct f2fs_inode, i_inode_checksum);
143 unsigned int cs_size = sizeof(dummy_cs);
144
145 chksum = f2fs_chksum(sbi, sbi->s_chksum_seed, (__u8 *)&ino,
146 sizeof(ino));
147 chksum_seed = f2fs_chksum(sbi, chksum, (__u8 *)&gen, sizeof(gen));
148
149 chksum = f2fs_chksum(sbi, chksum_seed, (__u8 *)ri, offset);
150 chksum = f2fs_chksum(sbi, chksum, (__u8 *)&dummy_cs, cs_size);
151 offset += cs_size;
152 chksum = f2fs_chksum(sbi, chksum, (__u8 *)ri + offset,
153 F2FS_BLKSIZE - offset);
154 return chksum;
155}
156
157bool f2fs_inode_chksum_verify(struct f2fs_sb_info *sbi, struct page *page)
158{
159 struct f2fs_inode *ri;
160 __u32 provided, calculated;
161
162 if (!f2fs_enable_inode_chksum(sbi, page) ||
163 PageDirty(page) || PageWriteback(page))
164 return true;
165
166 ri = &F2FS_NODE(page)->i;
167 provided = le32_to_cpu(ri->i_inode_checksum);
168 calculated = f2fs_inode_chksum(sbi, page);
169
170 if (provided != calculated)
171 f2fs_msg(sbi->sb, KERN_WARNING,
172 "checksum invalid, ino = %x, %x vs. %x",
173 ino_of_node(page), provided, calculated);
174
175 return provided == calculated;
176}
177
178void f2fs_inode_chksum_set(struct f2fs_sb_info *sbi, struct page *page)
179{
180 struct f2fs_inode *ri = &F2FS_NODE(page)->i;
181
182 if (!f2fs_enable_inode_chksum(sbi, page))
183 return;
184
185 ri->i_inode_checksum = cpu_to_le32(f2fs_inode_chksum(sbi, page));
186}
187
188static int do_read_inode(struct inode *inode)
189{
190 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
191 struct f2fs_inode_info *fi = F2FS_I(inode);
192 struct page *node_page;
193 struct f2fs_inode *ri;
194 projid_t i_projid;
195
196 /* Check if ino is within scope */
197 if (check_nid_range(sbi, inode->i_ino)) {
198 f2fs_msg(inode->i_sb, KERN_ERR, "bad inode number: %lu",
199 (unsigned long) inode->i_ino);
200 WARN_ON(1);
201 return -EINVAL;
202 }
203
204 node_page = get_node_page(sbi, inode->i_ino);
205 if (IS_ERR(node_page))
206 return PTR_ERR(node_page);
207
208 ri = F2FS_INODE(node_page);
209
210 inode->i_mode = le16_to_cpu(ri->i_mode);
211 i_uid_write(inode, le32_to_cpu(ri->i_uid));
212 i_gid_write(inode, le32_to_cpu(ri->i_gid));
213 set_nlink(inode, le32_to_cpu(ri->i_links));
214 inode->i_size = le64_to_cpu(ri->i_size);
215 inode->i_blocks = SECTOR_FROM_BLOCK(le64_to_cpu(ri->i_blocks) - 1);
216
217 inode->i_atime.tv_sec = le64_to_cpu(ri->i_atime);
218 inode->i_ctime.tv_sec = le64_to_cpu(ri->i_ctime);
219 inode->i_mtime.tv_sec = le64_to_cpu(ri->i_mtime);
220 inode->i_atime.tv_nsec = le32_to_cpu(ri->i_atime_nsec);
221 inode->i_ctime.tv_nsec = le32_to_cpu(ri->i_ctime_nsec);
222 inode->i_mtime.tv_nsec = le32_to_cpu(ri->i_mtime_nsec);
223 inode->i_generation = le32_to_cpu(ri->i_generation);
224
225 fi->i_current_depth = le32_to_cpu(ri->i_current_depth);
226 fi->i_xattr_nid = le32_to_cpu(ri->i_xattr_nid);
227 fi->i_flags = le32_to_cpu(ri->i_flags);
228 fi->flags = 0;
229 fi->i_advise = ri->i_advise;
230 fi->i_pino = le32_to_cpu(ri->i_pino);
231 fi->i_dir_level = ri->i_dir_level;
232
233 if (f2fs_init_extent_tree(inode, &ri->i_ext))
234 set_page_dirty(node_page);
235
236 get_inline_info(inode, ri);
237
238 fi->i_extra_isize = f2fs_has_extra_attr(inode) ?
239 le16_to_cpu(ri->i_extra_isize) : 0;
240
241 if (f2fs_sb_has_flexible_inline_xattr(sbi->sb)) {
242 f2fs_bug_on(sbi, !f2fs_has_extra_attr(inode));
243 fi->i_inline_xattr_size = le16_to_cpu(ri->i_inline_xattr_size);
244 } else if (f2fs_has_inline_xattr(inode) ||
245 f2fs_has_inline_dentry(inode)) {
246 fi->i_inline_xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
247 } else {
248
249 /*
250 * Previous inline data or directory always reserved 200 bytes
251 * in inode layout, even if inline_xattr is disabled. In order
252 * to keep inline_dentry's structure for backward compatibility,
253 * we get the space back only from inline_data.
254 */
255 fi->i_inline_xattr_size = 0;
256 }
257
258 /* check data exist */
259 if (f2fs_has_inline_data(inode) && !f2fs_exist_data(inode))
260 __recover_inline_status(inode, node_page);
261
262 /* get rdev by using inline_info */
263 __get_inode_rdev(inode, ri);
264
265 if (__written_first_block(ri))
266 set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN);
267
268 if (!need_inode_block_update(sbi, inode->i_ino))
269 fi->last_disk_size = inode->i_size;
270
271 if (fi->i_flags & FS_PROJINHERIT_FL)
272 set_inode_flag(inode, FI_PROJ_INHERIT);
273
274 if (f2fs_has_extra_attr(inode) && f2fs_sb_has_project_quota(sbi->sb) &&
275 F2FS_FITS_IN_INODE(ri, fi->i_extra_isize, i_projid))
276 i_projid = (projid_t)le32_to_cpu(ri->i_projid);
277 else
278 i_projid = F2FS_DEF_PROJID;
279 fi->i_projid = make_kprojid(&init_user_ns, i_projid);
280
281 if (f2fs_has_extra_attr(inode) && f2fs_sb_has_inode_crtime(sbi->sb) &&
282 F2FS_FITS_IN_INODE(ri, fi->i_extra_isize, i_crtime)) {
283 fi->i_crtime.tv_sec = le64_to_cpu(ri->i_crtime);
284 fi->i_crtime.tv_nsec = le32_to_cpu(ri->i_crtime_nsec);
285 }
286
287 F2FS_I(inode)->i_disk_time[0] = inode->i_atime;
288 F2FS_I(inode)->i_disk_time[1] = inode->i_ctime;
289 F2FS_I(inode)->i_disk_time[2] = inode->i_mtime;
290 F2FS_I(inode)->i_disk_time[3] = F2FS_I(inode)->i_crtime;
291 f2fs_put_page(node_page, 1);
292
293 stat_inc_inline_xattr(inode);
294 stat_inc_inline_inode(inode);
295 stat_inc_inline_dir(inode);
296
297 return 0;
298}
299
300struct inode *f2fs_iget(struct super_block *sb, unsigned long ino)
301{
302 struct f2fs_sb_info *sbi = F2FS_SB(sb);
303 struct inode *inode;
304 int ret = 0;
305
306 inode = iget_locked(sb, ino);
307 if (!inode)
308 return ERR_PTR(-ENOMEM);
309
310 if (!(inode->i_state & I_NEW)) {
311 trace_f2fs_iget(inode);
312 return inode;
313 }
314 if (ino == F2FS_NODE_INO(sbi) || ino == F2FS_META_INO(sbi))
315 goto make_now;
316
317 ret = do_read_inode(inode);
318 if (ret)
319 goto bad_inode;
320make_now:
321 if (ino == F2FS_NODE_INO(sbi)) {
322 inode->i_mapping->a_ops = &f2fs_node_aops;
323 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO);
324 } else if (ino == F2FS_META_INO(sbi)) {
325 inode->i_mapping->a_ops = &f2fs_meta_aops;
326 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO);
327 } else if (S_ISREG(inode->i_mode)) {
328 inode->i_op = &f2fs_file_inode_operations;
329 inode->i_fop = &f2fs_file_operations;
330 inode->i_mapping->a_ops = &f2fs_dblock_aops;
331 } else if (S_ISDIR(inode->i_mode)) {
332 inode->i_op = &f2fs_dir_inode_operations;
333 inode->i_fop = &f2fs_dir_operations;
334 inode->i_mapping->a_ops = &f2fs_dblock_aops;
335 inode_nohighmem(inode);
336 } else if (S_ISLNK(inode->i_mode)) {
337 if (f2fs_encrypted_inode(inode))
338 inode->i_op = &f2fs_encrypted_symlink_inode_operations;
339 else
340 inode->i_op = &f2fs_symlink_inode_operations;
341 inode_nohighmem(inode);
342 inode->i_mapping->a_ops = &f2fs_dblock_aops;
343 } else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) ||
344 S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) {
345 inode->i_op = &f2fs_special_inode_operations;
346 init_special_inode(inode, inode->i_mode, inode->i_rdev);
347 } else {
348 ret = -EIO;
349 goto bad_inode;
350 }
351 f2fs_set_inode_flags(inode);
352 unlock_new_inode(inode);
353 trace_f2fs_iget(inode);
354 return inode;
355
356bad_inode:
357 iget_failed(inode);
358 trace_f2fs_iget_exit(inode, ret);
359 return ERR_PTR(ret);
360}
361
362struct inode *f2fs_iget_retry(struct super_block *sb, unsigned long ino)
363{
364 struct inode *inode;
365retry:
366 inode = f2fs_iget(sb, ino);
367 if (IS_ERR(inode)) {
368 if (PTR_ERR(inode) == -ENOMEM) {
369 congestion_wait(BLK_RW_ASYNC, HZ/50);
370 goto retry;
371 }
372 }
373 return inode;
374}
375
376void update_inode(struct inode *inode, struct page *node_page)
377{
378 struct f2fs_inode *ri;
379 struct extent_tree *et = F2FS_I(inode)->extent_tree;
380
381 f2fs_wait_on_page_writeback(node_page, NODE, true);
382 set_page_dirty(node_page);
383
384 f2fs_inode_synced(inode);
385
386 ri = F2FS_INODE(node_page);
387
388 ri->i_mode = cpu_to_le16(inode->i_mode);
389 ri->i_advise = F2FS_I(inode)->i_advise;
390 ri->i_uid = cpu_to_le32(i_uid_read(inode));
391 ri->i_gid = cpu_to_le32(i_gid_read(inode));
392 ri->i_links = cpu_to_le32(inode->i_nlink);
393 ri->i_size = cpu_to_le64(i_size_read(inode));
394 ri->i_blocks = cpu_to_le64(SECTOR_TO_BLOCK(inode->i_blocks) + 1);
395
396 if (et) {
397 read_lock(&et->lock);
398 set_raw_extent(&et->largest, &ri->i_ext);
399 read_unlock(&et->lock);
400 } else {
401 memset(&ri->i_ext, 0, sizeof(ri->i_ext));
402 }
403 set_raw_inline(inode, ri);
404
405 ri->i_atime = cpu_to_le64(inode->i_atime.tv_sec);
406 ri->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
407 ri->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec);
408 ri->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
409 ri->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
410 ri->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec);
411 ri->i_current_depth = cpu_to_le32(F2FS_I(inode)->i_current_depth);
412 ri->i_xattr_nid = cpu_to_le32(F2FS_I(inode)->i_xattr_nid);
413 ri->i_flags = cpu_to_le32(F2FS_I(inode)->i_flags);
414 ri->i_pino = cpu_to_le32(F2FS_I(inode)->i_pino);
415 ri->i_generation = cpu_to_le32(inode->i_generation);
416 ri->i_dir_level = F2FS_I(inode)->i_dir_level;
417
418 if (f2fs_has_extra_attr(inode)) {
419 ri->i_extra_isize = cpu_to_le16(F2FS_I(inode)->i_extra_isize);
420
421 if (f2fs_sb_has_flexible_inline_xattr(F2FS_I_SB(inode)->sb))
422 ri->i_inline_xattr_size =
423 cpu_to_le16(F2FS_I(inode)->i_inline_xattr_size);
424
425 if (f2fs_sb_has_project_quota(F2FS_I_SB(inode)->sb) &&
426 F2FS_FITS_IN_INODE(ri, F2FS_I(inode)->i_extra_isize,
427 i_projid)) {
428 projid_t i_projid;
429
430 i_projid = from_kprojid(&init_user_ns,
431 F2FS_I(inode)->i_projid);
432 ri->i_projid = cpu_to_le32(i_projid);
433 }
434
435 if (f2fs_sb_has_inode_crtime(F2FS_I_SB(inode)->sb) &&
436 F2FS_FITS_IN_INODE(ri, F2FS_I(inode)->i_extra_isize,
437 i_crtime)) {
438 ri->i_crtime =
439 cpu_to_le64(F2FS_I(inode)->i_crtime.tv_sec);
440 ri->i_crtime_nsec =
441 cpu_to_le32(F2FS_I(inode)->i_crtime.tv_nsec);
442 }
443 }
444
445 __set_inode_rdev(inode, ri);
446
447 /* deleted inode */
448 if (inode->i_nlink == 0)
449 clear_inline_node(node_page);
450
451 F2FS_I(inode)->i_disk_time[0] = inode->i_atime;
452 F2FS_I(inode)->i_disk_time[1] = inode->i_ctime;
453 F2FS_I(inode)->i_disk_time[2] = inode->i_mtime;
454 F2FS_I(inode)->i_disk_time[3] = F2FS_I(inode)->i_crtime;
455}
456
457void update_inode_page(struct inode *inode)
458{
459 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
460 struct page *node_page;
461retry:
462 node_page = get_node_page(sbi, inode->i_ino);
463 if (IS_ERR(node_page)) {
464 int err = PTR_ERR(node_page);
465 if (err == -ENOMEM) {
466 cond_resched();
467 goto retry;
468 } else if (err != -ENOENT) {
469 f2fs_stop_checkpoint(sbi, false);
470 }
471 return;
472 }
473 update_inode(inode, node_page);
474 f2fs_put_page(node_page, 1);
475}
476
477int f2fs_write_inode(struct inode *inode, struct writeback_control *wbc)
478{
479 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
480
481 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
482 inode->i_ino == F2FS_META_INO(sbi))
483 return 0;
484
485 if (!is_inode_flag_set(inode, FI_DIRTY_INODE))
486 return 0;
487
488 /*
489 * We need to balance fs here to prevent from producing dirty node pages
490 * during the urgent cleaning time when runing out of free sections.
491 */
492 update_inode_page(inode);
493 if (wbc && wbc->nr_to_write)
494 f2fs_balance_fs(sbi, true);
495 return 0;
496}
497
498/*
499 * Called at the last iput() if i_nlink is zero
500 */
501void f2fs_evict_inode(struct inode *inode)
502{
503 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
504 nid_t xnid = F2FS_I(inode)->i_xattr_nid;
505 int err = 0;
506
507 /* some remained atomic pages should discarded */
508 if (f2fs_is_atomic_file(inode))
509 drop_inmem_pages(inode);
510
511 trace_f2fs_evict_inode(inode);
512 truncate_inode_pages_final(&inode->i_data);
513
514 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
515 inode->i_ino == F2FS_META_INO(sbi))
516 goto out_clear;
517
518 f2fs_bug_on(sbi, get_dirty_pages(inode));
519 remove_dirty_inode(inode);
520
521 f2fs_destroy_extent_tree(inode);
522
523 if (inode->i_nlink || is_bad_inode(inode))
524 goto no_delete;
525
526 dquot_initialize(inode);
527
528 remove_ino_entry(sbi, inode->i_ino, APPEND_INO);
529 remove_ino_entry(sbi, inode->i_ino, UPDATE_INO);
530 remove_ino_entry(sbi, inode->i_ino, FLUSH_INO);
531
532 sb_start_intwrite(inode->i_sb);
533 set_inode_flag(inode, FI_NO_ALLOC);
534 i_size_write(inode, 0);
535retry:
536 if (F2FS_HAS_BLOCKS(inode))
537 err = f2fs_truncate(inode);
538
539#ifdef CONFIG_F2FS_FAULT_INJECTION
540 if (time_to_inject(sbi, FAULT_EVICT_INODE)) {
541 f2fs_show_injection_info(FAULT_EVICT_INODE);
542 err = -EIO;
543 }
544#endif
545 if (!err) {
546 f2fs_lock_op(sbi);
547 err = remove_inode_page(inode);
548 f2fs_unlock_op(sbi);
549 if (err == -ENOENT)
550 err = 0;
551 }
552
553 /* give more chances, if ENOMEM case */
554 if (err == -ENOMEM) {
555 err = 0;
556 goto retry;
557 }
558
559 if (err)
560 update_inode_page(inode);
561 dquot_free_inode(inode);
562 sb_end_intwrite(inode->i_sb);
563no_delete:
564 dquot_drop(inode);
565
566 stat_dec_inline_xattr(inode);
567 stat_dec_inline_dir(inode);
568 stat_dec_inline_inode(inode);
569
570 if (likely(!is_set_ckpt_flags(sbi, CP_ERROR_FLAG)))
571 f2fs_bug_on(sbi, is_inode_flag_set(inode, FI_DIRTY_INODE));
572 else
573 f2fs_inode_synced(inode);
574
575 /* ino == 0, if f2fs_new_inode() was failed t*/
576 if (inode->i_ino)
577 invalidate_mapping_pages(NODE_MAPPING(sbi), inode->i_ino,
578 inode->i_ino);
579 if (xnid)
580 invalidate_mapping_pages(NODE_MAPPING(sbi), xnid, xnid);
581 if (inode->i_nlink) {
582 if (is_inode_flag_set(inode, FI_APPEND_WRITE))
583 add_ino_entry(sbi, inode->i_ino, APPEND_INO);
584 if (is_inode_flag_set(inode, FI_UPDATE_WRITE))
585 add_ino_entry(sbi, inode->i_ino, UPDATE_INO);
586 }
587 if (is_inode_flag_set(inode, FI_FREE_NID)) {
588 alloc_nid_failed(sbi, inode->i_ino);
589 clear_inode_flag(inode, FI_FREE_NID);
590 } else {
591 f2fs_bug_on(sbi, err &&
592 !exist_written_data(sbi, inode->i_ino, ORPHAN_INO));
593 }
594out_clear:
595 fscrypt_put_encryption_info(inode);
596 clear_inode(inode);
597}
598
599/* caller should call f2fs_lock_op() */
600void handle_failed_inode(struct inode *inode)
601{
602 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
603 struct node_info ni;
604
605 /*
606 * clear nlink of inode in order to release resource of inode
607 * immediately.
608 */
609 clear_nlink(inode);
610
611 /*
612 * we must call this to avoid inode being remained as dirty, resulting
613 * in a panic when flushing dirty inodes in gdirty_list.
614 */
615 update_inode_page(inode);
616 f2fs_inode_synced(inode);
617
618 /* don't make bad inode, since it becomes a regular file. */
619 unlock_new_inode(inode);
620
621 /*
622 * Note: we should add inode to orphan list before f2fs_unlock_op()
623 * so we can prevent losing this orphan when encoutering checkpoint
624 * and following suddenly power-off.
625 */
626 get_node_info(sbi, inode->i_ino, &ni);
627
628 if (ni.blk_addr != NULL_ADDR) {
629 int err = acquire_orphan_inode(sbi);
630 if (err) {
631 set_sbi_flag(sbi, SBI_NEED_FSCK);
632 f2fs_msg(sbi->sb, KERN_WARNING,
633 "Too many orphan inodes, run fsck to fix.");
634 } else {
635 add_orphan_inode(inode);
636 }
637 alloc_nid_done(sbi, inode->i_ino);
638 } else {
639 set_inode_flag(inode, FI_FREE_NID);
640 }
641
642 f2fs_unlock_op(sbi);
643
644 /* iput will drop the inode object */
645 iput(inode);
646}