Commit | Line | Data |
---|---|---|
0a8165d7 | 1 | /* |
aff063e2 JK |
2 | * fs/f2fs/super.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/module.h> | |
12 | #include <linux/init.h> | |
13 | #include <linux/fs.h> | |
14 | #include <linux/statfs.h> | |
aff063e2 JK |
15 | #include <linux/buffer_head.h> |
16 | #include <linux/backing-dev.h> | |
17 | #include <linux/kthread.h> | |
18 | #include <linux/parser.h> | |
19 | #include <linux/mount.h> | |
20 | #include <linux/seq_file.h> | |
5e176d54 | 21 | #include <linux/proc_fs.h> |
aff063e2 JK |
22 | #include <linux/random.h> |
23 | #include <linux/exportfs.h> | |
d3ee456d | 24 | #include <linux/blkdev.h> |
aff063e2 | 25 | #include <linux/f2fs_fs.h> |
b59d0bae | 26 | #include <linux/sysfs.h> |
aff063e2 JK |
27 | |
28 | #include "f2fs.h" | |
29 | #include "node.h" | |
5ec4e49f | 30 | #include "segment.h" |
aff063e2 | 31 | #include "xattr.h" |
b59d0bae | 32 | #include "gc.h" |
aff063e2 | 33 | |
a2a4a7e4 NJ |
34 | #define CREATE_TRACE_POINTS |
35 | #include <trace/events/f2fs.h> | |
36 | ||
5e176d54 | 37 | static struct proc_dir_entry *f2fs_proc_root; |
aff063e2 | 38 | static struct kmem_cache *f2fs_inode_cachep; |
b59d0bae | 39 | static struct kset *f2fs_kset; |
aff063e2 JK |
40 | |
41 | enum { | |
696c018c | 42 | Opt_gc_background, |
aff063e2 JK |
43 | Opt_disable_roll_forward, |
44 | Opt_discard, | |
45 | Opt_noheap, | |
46 | Opt_nouser_xattr, | |
47 | Opt_noacl, | |
48 | Opt_active_logs, | |
49 | Opt_disable_ext_identify, | |
444c580f | 50 | Opt_inline_xattr, |
aff063e2 JK |
51 | Opt_err, |
52 | }; | |
53 | ||
54 | static match_table_t f2fs_tokens = { | |
696c018c | 55 | {Opt_gc_background, "background_gc=%s"}, |
aff063e2 JK |
56 | {Opt_disable_roll_forward, "disable_roll_forward"}, |
57 | {Opt_discard, "discard"}, | |
58 | {Opt_noheap, "no_heap"}, | |
59 | {Opt_nouser_xattr, "nouser_xattr"}, | |
60 | {Opt_noacl, "noacl"}, | |
61 | {Opt_active_logs, "active_logs=%u"}, | |
62 | {Opt_disable_ext_identify, "disable_ext_identify"}, | |
444c580f | 63 | {Opt_inline_xattr, "inline_xattr"}, |
aff063e2 JK |
64 | {Opt_err, NULL}, |
65 | }; | |
66 | ||
b59d0bae NJ |
67 | /* Sysfs support for f2fs */ |
68 | struct f2fs_attr { | |
69 | struct attribute attr; | |
70 | ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *); | |
71 | ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *, | |
72 | const char *, size_t); | |
73 | int offset; | |
74 | }; | |
75 | ||
76 | static ssize_t f2fs_sbi_show(struct f2fs_attr *a, | |
77 | struct f2fs_sb_info *sbi, char *buf) | |
78 | { | |
79 | struct f2fs_gc_kthread *gc_kth = sbi->gc_thread; | |
80 | unsigned int *ui; | |
81 | ||
82 | if (!gc_kth) | |
83 | return -EINVAL; | |
84 | ||
85 | ui = (unsigned int *)(((char *)gc_kth) + a->offset); | |
86 | ||
87 | return snprintf(buf, PAGE_SIZE, "%u\n", *ui); | |
88 | } | |
89 | ||
90 | static ssize_t f2fs_sbi_store(struct f2fs_attr *a, | |
91 | struct f2fs_sb_info *sbi, | |
92 | const char *buf, size_t count) | |
93 | { | |
94 | struct f2fs_gc_kthread *gc_kth = sbi->gc_thread; | |
95 | unsigned long t; | |
96 | unsigned int *ui; | |
97 | ssize_t ret; | |
98 | ||
99 | if (!gc_kth) | |
100 | return -EINVAL; | |
101 | ||
102 | ui = (unsigned int *)(((char *)gc_kth) + a->offset); | |
103 | ||
104 | ret = kstrtoul(skip_spaces(buf), 0, &t); | |
105 | if (ret < 0) | |
106 | return ret; | |
107 | *ui = t; | |
108 | return count; | |
109 | } | |
110 | ||
111 | static ssize_t f2fs_attr_show(struct kobject *kobj, | |
112 | struct attribute *attr, char *buf) | |
113 | { | |
114 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, | |
115 | s_kobj); | |
116 | struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); | |
117 | ||
118 | return a->show ? a->show(a, sbi, buf) : 0; | |
119 | } | |
120 | ||
121 | static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr, | |
122 | const char *buf, size_t len) | |
123 | { | |
124 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, | |
125 | s_kobj); | |
126 | struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); | |
127 | ||
128 | return a->store ? a->store(a, sbi, buf, len) : 0; | |
129 | } | |
130 | ||
131 | static void f2fs_sb_release(struct kobject *kobj) | |
132 | { | |
133 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, | |
134 | s_kobj); | |
135 | complete(&sbi->s_kobj_unregister); | |
136 | } | |
137 | ||
138 | #define F2FS_ATTR_OFFSET(_name, _mode, _show, _store, _elname) \ | |
139 | static struct f2fs_attr f2fs_attr_##_name = { \ | |
140 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
141 | .show = _show, \ | |
142 | .store = _store, \ | |
143 | .offset = offsetof(struct f2fs_gc_kthread, _elname), \ | |
144 | } | |
145 | ||
146 | #define F2FS_RW_ATTR(name, elname) \ | |
147 | F2FS_ATTR_OFFSET(name, 0644, f2fs_sbi_show, f2fs_sbi_store, elname) | |
148 | ||
149 | F2FS_RW_ATTR(gc_min_sleep_time, min_sleep_time); | |
150 | F2FS_RW_ATTR(gc_max_sleep_time, max_sleep_time); | |
151 | F2FS_RW_ATTR(gc_no_gc_sleep_time, no_gc_sleep_time); | |
d2dc095f | 152 | F2FS_RW_ATTR(gc_idle, gc_idle); |
b59d0bae NJ |
153 | |
154 | #define ATTR_LIST(name) (&f2fs_attr_##name.attr) | |
155 | static struct attribute *f2fs_attrs[] = { | |
156 | ATTR_LIST(gc_min_sleep_time), | |
157 | ATTR_LIST(gc_max_sleep_time), | |
158 | ATTR_LIST(gc_no_gc_sleep_time), | |
d2dc095f | 159 | ATTR_LIST(gc_idle), |
b59d0bae NJ |
160 | NULL, |
161 | }; | |
162 | ||
163 | static const struct sysfs_ops f2fs_attr_ops = { | |
164 | .show = f2fs_attr_show, | |
165 | .store = f2fs_attr_store, | |
166 | }; | |
167 | ||
168 | static struct kobj_type f2fs_ktype = { | |
169 | .default_attrs = f2fs_attrs, | |
170 | .sysfs_ops = &f2fs_attr_ops, | |
171 | .release = f2fs_sb_release, | |
172 | }; | |
173 | ||
a07ef784 NJ |
174 | void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...) |
175 | { | |
176 | struct va_format vaf; | |
177 | va_list args; | |
178 | ||
179 | va_start(args, fmt); | |
180 | vaf.fmt = fmt; | |
181 | vaf.va = &args; | |
182 | printk("%sF2FS-fs (%s): %pV\n", level, sb->s_id, &vaf); | |
183 | va_end(args); | |
184 | } | |
185 | ||
aff063e2 JK |
186 | static void init_once(void *foo) |
187 | { | |
188 | struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo; | |
189 | ||
aff063e2 JK |
190 | inode_init_once(&fi->vfs_inode); |
191 | } | |
192 | ||
696c018c NJ |
193 | static int parse_options(struct super_block *sb, char *options) |
194 | { | |
195 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
196 | substring_t args[MAX_OPT_ARGS]; | |
197 | char *p, *name; | |
198 | int arg = 0; | |
199 | ||
200 | if (!options) | |
201 | return 0; | |
202 | ||
203 | while ((p = strsep(&options, ",")) != NULL) { | |
204 | int token; | |
205 | if (!*p) | |
206 | continue; | |
207 | /* | |
208 | * Initialize args struct so we know whether arg was | |
209 | * found; some options take optional arguments. | |
210 | */ | |
211 | args[0].to = args[0].from = NULL; | |
212 | token = match_token(p, f2fs_tokens, args); | |
213 | ||
214 | switch (token) { | |
215 | case Opt_gc_background: | |
216 | name = match_strdup(&args[0]); | |
217 | ||
218 | if (!name) | |
219 | return -ENOMEM; | |
220 | if (!strncmp(name, "on", 2)) | |
221 | set_opt(sbi, BG_GC); | |
222 | else if (!strncmp(name, "off", 3)) | |
223 | clear_opt(sbi, BG_GC); | |
224 | else { | |
225 | kfree(name); | |
226 | return -EINVAL; | |
227 | } | |
228 | kfree(name); | |
229 | break; | |
230 | case Opt_disable_roll_forward: | |
231 | set_opt(sbi, DISABLE_ROLL_FORWARD); | |
232 | break; | |
233 | case Opt_discard: | |
234 | set_opt(sbi, DISCARD); | |
235 | break; | |
236 | case Opt_noheap: | |
237 | set_opt(sbi, NOHEAP); | |
238 | break; | |
239 | #ifdef CONFIG_F2FS_FS_XATTR | |
240 | case Opt_nouser_xattr: | |
241 | clear_opt(sbi, XATTR_USER); | |
242 | break; | |
444c580f JK |
243 | case Opt_inline_xattr: |
244 | set_opt(sbi, INLINE_XATTR); | |
245 | break; | |
696c018c NJ |
246 | #else |
247 | case Opt_nouser_xattr: | |
248 | f2fs_msg(sb, KERN_INFO, | |
249 | "nouser_xattr options not supported"); | |
250 | break; | |
444c580f JK |
251 | case Opt_inline_xattr: |
252 | f2fs_msg(sb, KERN_INFO, | |
253 | "inline_xattr options not supported"); | |
254 | break; | |
696c018c NJ |
255 | #endif |
256 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
257 | case Opt_noacl: | |
258 | clear_opt(sbi, POSIX_ACL); | |
259 | break; | |
260 | #else | |
261 | case Opt_noacl: | |
262 | f2fs_msg(sb, KERN_INFO, "noacl options not supported"); | |
263 | break; | |
264 | #endif | |
265 | case Opt_active_logs: | |
266 | if (args->from && match_int(args, &arg)) | |
267 | return -EINVAL; | |
268 | if (arg != 2 && arg != 4 && arg != NR_CURSEG_TYPE) | |
269 | return -EINVAL; | |
270 | sbi->active_logs = arg; | |
271 | break; | |
272 | case Opt_disable_ext_identify: | |
273 | set_opt(sbi, DISABLE_EXT_IDENTIFY); | |
274 | break; | |
275 | default: | |
276 | f2fs_msg(sb, KERN_ERR, | |
277 | "Unrecognized mount option \"%s\" or missing value", | |
278 | p); | |
279 | return -EINVAL; | |
280 | } | |
281 | } | |
282 | return 0; | |
283 | } | |
284 | ||
aff063e2 JK |
285 | static struct inode *f2fs_alloc_inode(struct super_block *sb) |
286 | { | |
287 | struct f2fs_inode_info *fi; | |
288 | ||
289 | fi = kmem_cache_alloc(f2fs_inode_cachep, GFP_NOFS | __GFP_ZERO); | |
290 | if (!fi) | |
291 | return NULL; | |
292 | ||
293 | init_once((void *) fi); | |
294 | ||
434720fa | 295 | /* Initialize f2fs-specific inode info */ |
aff063e2 JK |
296 | fi->vfs_inode.i_version = 1; |
297 | atomic_set(&fi->dirty_dents, 0); | |
298 | fi->i_current_depth = 1; | |
299 | fi->i_advise = 0; | |
300 | rwlock_init(&fi->ext.ext_lock); | |
301 | ||
302 | set_inode_flag(fi, FI_NEW_INODE); | |
303 | ||
444c580f JK |
304 | if (test_opt(F2FS_SB(sb), INLINE_XATTR)) |
305 | set_inode_flag(fi, FI_INLINE_XATTR); | |
306 | ||
aff063e2 JK |
307 | return &fi->vfs_inode; |
308 | } | |
309 | ||
531ad7d5 JK |
310 | static int f2fs_drop_inode(struct inode *inode) |
311 | { | |
312 | /* | |
313 | * This is to avoid a deadlock condition like below. | |
314 | * writeback_single_inode(inode) | |
315 | * - f2fs_write_data_page | |
316 | * - f2fs_gc -> iput -> evict | |
317 | * - inode_wait_for_writeback(inode) | |
318 | */ | |
319 | if (!inode_unhashed(inode) && inode->i_state & I_SYNC) | |
320 | return 0; | |
321 | return generic_drop_inode(inode); | |
322 | } | |
323 | ||
b3783873 JK |
324 | /* |
325 | * f2fs_dirty_inode() is called from __mark_inode_dirty() | |
326 | * | |
327 | * We should call set_dirty_inode to write the dirty inode through write_inode. | |
328 | */ | |
329 | static void f2fs_dirty_inode(struct inode *inode, int flags) | |
330 | { | |
331 | set_inode_flag(F2FS_I(inode), FI_DIRTY_INODE); | |
b3783873 JK |
332 | } |
333 | ||
aff063e2 JK |
334 | static void f2fs_i_callback(struct rcu_head *head) |
335 | { | |
336 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
337 | kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode)); | |
338 | } | |
339 | ||
25ca923b | 340 | static void f2fs_destroy_inode(struct inode *inode) |
aff063e2 JK |
341 | { |
342 | call_rcu(&inode->i_rcu, f2fs_i_callback); | |
343 | } | |
344 | ||
345 | static void f2fs_put_super(struct super_block *sb) | |
346 | { | |
347 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
348 | ||
5e176d54 JK |
349 | if (sbi->s_proc) { |
350 | remove_proc_entry("segment_info", sbi->s_proc); | |
351 | remove_proc_entry(sb->s_id, f2fs_proc_root); | |
352 | } | |
b59d0bae | 353 | kobject_del(&sbi->s_kobj); |
5e176d54 | 354 | |
aff063e2 JK |
355 | f2fs_destroy_stats(sbi); |
356 | stop_gc_thread(sbi); | |
357 | ||
43727527 | 358 | write_checkpoint(sbi, true); |
aff063e2 JK |
359 | |
360 | iput(sbi->node_inode); | |
361 | iput(sbi->meta_inode); | |
362 | ||
363 | /* destroy f2fs internal modules */ | |
364 | destroy_node_manager(sbi); | |
365 | destroy_segment_manager(sbi); | |
366 | ||
367 | kfree(sbi->ckpt); | |
b59d0bae NJ |
368 | kobject_put(&sbi->s_kobj); |
369 | wait_for_completion(&sbi->s_kobj_unregister); | |
aff063e2 JK |
370 | |
371 | sb->s_fs_info = NULL; | |
372 | brelse(sbi->raw_super_buf); | |
373 | kfree(sbi); | |
374 | } | |
375 | ||
376 | int f2fs_sync_fs(struct super_block *sb, int sync) | |
377 | { | |
378 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
aff063e2 | 379 | |
a2a4a7e4 NJ |
380 | trace_f2fs_sync_fs(sb, sync); |
381 | ||
aff063e2 JK |
382 | if (!sbi->s_dirty && !get_pages(sbi, F2FS_DIRTY_NODES)) |
383 | return 0; | |
384 | ||
b7473754 JK |
385 | if (sync) { |
386 | mutex_lock(&sbi->gc_mutex); | |
43727527 | 387 | write_checkpoint(sbi, false); |
b7473754 JK |
388 | mutex_unlock(&sbi->gc_mutex); |
389 | } else { | |
7d82db83 | 390 | f2fs_balance_fs(sbi); |
b7473754 | 391 | } |
aff063e2 | 392 | |
64c576fe | 393 | return 0; |
aff063e2 JK |
394 | } |
395 | ||
d6212a5f CL |
396 | static int f2fs_freeze(struct super_block *sb) |
397 | { | |
398 | int err; | |
399 | ||
77888c1e | 400 | if (f2fs_readonly(sb)) |
d6212a5f CL |
401 | return 0; |
402 | ||
403 | err = f2fs_sync_fs(sb, 1); | |
404 | return err; | |
405 | } | |
406 | ||
407 | static int f2fs_unfreeze(struct super_block *sb) | |
408 | { | |
409 | return 0; | |
410 | } | |
411 | ||
aff063e2 JK |
412 | static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf) |
413 | { | |
414 | struct super_block *sb = dentry->d_sb; | |
415 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
416 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); | |
417 | block_t total_count, user_block_count, start_count, ovp_count; | |
418 | ||
419 | total_count = le64_to_cpu(sbi->raw_super->block_count); | |
420 | user_block_count = sbi->user_block_count; | |
421 | start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr); | |
422 | ovp_count = SM_I(sbi)->ovp_segments << sbi->log_blocks_per_seg; | |
423 | buf->f_type = F2FS_SUPER_MAGIC; | |
424 | buf->f_bsize = sbi->blocksize; | |
425 | ||
426 | buf->f_blocks = total_count - start_count; | |
427 | buf->f_bfree = buf->f_blocks - valid_user_blocks(sbi) - ovp_count; | |
428 | buf->f_bavail = user_block_count - valid_user_blocks(sbi); | |
429 | ||
1362b5e3 JK |
430 | buf->f_files = sbi->total_node_count; |
431 | buf->f_ffree = sbi->total_node_count - valid_inode_count(sbi); | |
aff063e2 | 432 | |
5a20d339 | 433 | buf->f_namelen = F2FS_NAME_LEN; |
aff063e2 JK |
434 | buf->f_fsid.val[0] = (u32)id; |
435 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
436 | ||
437 | return 0; | |
438 | } | |
439 | ||
440 | static int f2fs_show_options(struct seq_file *seq, struct dentry *root) | |
441 | { | |
442 | struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb); | |
443 | ||
696c018c NJ |
444 | if (!(root->d_sb->s_flags & MS_RDONLY) && test_opt(sbi, BG_GC)) |
445 | seq_printf(seq, ",background_gc=%s", "on"); | |
aff063e2 | 446 | else |
696c018c | 447 | seq_printf(seq, ",background_gc=%s", "off"); |
aff063e2 JK |
448 | if (test_opt(sbi, DISABLE_ROLL_FORWARD)) |
449 | seq_puts(seq, ",disable_roll_forward"); | |
450 | if (test_opt(sbi, DISCARD)) | |
451 | seq_puts(seq, ",discard"); | |
452 | if (test_opt(sbi, NOHEAP)) | |
453 | seq_puts(seq, ",no_heap_alloc"); | |
454 | #ifdef CONFIG_F2FS_FS_XATTR | |
455 | if (test_opt(sbi, XATTR_USER)) | |
456 | seq_puts(seq, ",user_xattr"); | |
457 | else | |
458 | seq_puts(seq, ",nouser_xattr"); | |
444c580f JK |
459 | if (test_opt(sbi, INLINE_XATTR)) |
460 | seq_puts(seq, ",inline_xattr"); | |
aff063e2 JK |
461 | #endif |
462 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
463 | if (test_opt(sbi, POSIX_ACL)) | |
464 | seq_puts(seq, ",acl"); | |
465 | else | |
466 | seq_puts(seq, ",noacl"); | |
467 | #endif | |
468 | if (test_opt(sbi, DISABLE_EXT_IDENTIFY)) | |
aa43507f | 469 | seq_puts(seq, ",disable_ext_identify"); |
aff063e2 JK |
470 | |
471 | seq_printf(seq, ",active_logs=%u", sbi->active_logs); | |
472 | ||
473 | return 0; | |
474 | } | |
475 | ||
5e176d54 JK |
476 | static int segment_info_seq_show(struct seq_file *seq, void *offset) |
477 | { | |
478 | struct super_block *sb = seq->private; | |
479 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
480 | unsigned int total_segs = le32_to_cpu(sbi->raw_super->segment_count_main); | |
481 | int i; | |
482 | ||
483 | for (i = 0; i < total_segs; i++) { | |
484 | seq_printf(seq, "%u", get_valid_blocks(sbi, i, 1)); | |
485 | if (i != 0 && (i % 10) == 0) | |
486 | seq_puts(seq, "\n"); | |
487 | else | |
488 | seq_puts(seq, " "); | |
489 | } | |
490 | return 0; | |
491 | } | |
492 | ||
493 | static int segment_info_open_fs(struct inode *inode, struct file *file) | |
494 | { | |
495 | return single_open(file, segment_info_seq_show, PDE_DATA(inode)); | |
496 | } | |
497 | ||
498 | static const struct file_operations f2fs_seq_segment_info_fops = { | |
499 | .owner = THIS_MODULE, | |
500 | .open = segment_info_open_fs, | |
501 | .read = seq_read, | |
502 | .llseek = seq_lseek, | |
503 | .release = single_release, | |
504 | }; | |
505 | ||
696c018c NJ |
506 | static int f2fs_remount(struct super_block *sb, int *flags, char *data) |
507 | { | |
508 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
509 | struct f2fs_mount_info org_mount_opt; | |
510 | int err, active_logs; | |
511 | ||
512 | /* | |
513 | * Save the old mount options in case we | |
514 | * need to restore them. | |
515 | */ | |
516 | org_mount_opt = sbi->mount_opt; | |
517 | active_logs = sbi->active_logs; | |
518 | ||
519 | /* parse mount options */ | |
520 | err = parse_options(sb, data); | |
521 | if (err) | |
522 | goto restore_opts; | |
523 | ||
524 | /* | |
525 | * Previous and new state of filesystem is RO, | |
526 | * so no point in checking GC conditions. | |
527 | */ | |
528 | if ((sb->s_flags & MS_RDONLY) && (*flags & MS_RDONLY)) | |
529 | goto skip; | |
530 | ||
531 | /* | |
532 | * We stop the GC thread if FS is mounted as RO | |
533 | * or if background_gc = off is passed in mount | |
534 | * option. Also sync the filesystem. | |
535 | */ | |
536 | if ((*flags & MS_RDONLY) || !test_opt(sbi, BG_GC)) { | |
537 | if (sbi->gc_thread) { | |
538 | stop_gc_thread(sbi); | |
539 | f2fs_sync_fs(sb, 1); | |
540 | } | |
541 | } else if (test_opt(sbi, BG_GC) && !sbi->gc_thread) { | |
542 | err = start_gc_thread(sbi); | |
543 | if (err) | |
544 | goto restore_opts; | |
545 | } | |
546 | skip: | |
547 | /* Update the POSIXACL Flag */ | |
548 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
549 | (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0); | |
550 | return 0; | |
551 | ||
552 | restore_opts: | |
553 | sbi->mount_opt = org_mount_opt; | |
554 | sbi->active_logs = active_logs; | |
555 | return err; | |
556 | } | |
557 | ||
aff063e2 JK |
558 | static struct super_operations f2fs_sops = { |
559 | .alloc_inode = f2fs_alloc_inode, | |
531ad7d5 | 560 | .drop_inode = f2fs_drop_inode, |
aff063e2 JK |
561 | .destroy_inode = f2fs_destroy_inode, |
562 | .write_inode = f2fs_write_inode, | |
b3783873 | 563 | .dirty_inode = f2fs_dirty_inode, |
aff063e2 JK |
564 | .show_options = f2fs_show_options, |
565 | .evict_inode = f2fs_evict_inode, | |
566 | .put_super = f2fs_put_super, | |
567 | .sync_fs = f2fs_sync_fs, | |
d6212a5f CL |
568 | .freeze_fs = f2fs_freeze, |
569 | .unfreeze_fs = f2fs_unfreeze, | |
aff063e2 | 570 | .statfs = f2fs_statfs, |
696c018c | 571 | .remount_fs = f2fs_remount, |
aff063e2 JK |
572 | }; |
573 | ||
574 | static struct inode *f2fs_nfs_get_inode(struct super_block *sb, | |
575 | u64 ino, u32 generation) | |
576 | { | |
577 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
578 | struct inode *inode; | |
579 | ||
580 | if (ino < F2FS_ROOT_INO(sbi)) | |
581 | return ERR_PTR(-ESTALE); | |
582 | ||
583 | /* | |
584 | * f2fs_iget isn't quite right if the inode is currently unallocated! | |
585 | * However f2fs_iget currently does appropriate checks to handle stale | |
586 | * inodes so everything is OK. | |
587 | */ | |
588 | inode = f2fs_iget(sb, ino); | |
589 | if (IS_ERR(inode)) | |
590 | return ERR_CAST(inode); | |
591 | if (generation && inode->i_generation != generation) { | |
592 | /* we didn't find the right inode.. */ | |
593 | iput(inode); | |
594 | return ERR_PTR(-ESTALE); | |
595 | } | |
596 | return inode; | |
597 | } | |
598 | ||
599 | static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
600 | int fh_len, int fh_type) | |
601 | { | |
602 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
603 | f2fs_nfs_get_inode); | |
604 | } | |
605 | ||
606 | static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid, | |
607 | int fh_len, int fh_type) | |
608 | { | |
609 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
610 | f2fs_nfs_get_inode); | |
611 | } | |
612 | ||
613 | static const struct export_operations f2fs_export_ops = { | |
614 | .fh_to_dentry = f2fs_fh_to_dentry, | |
615 | .fh_to_parent = f2fs_fh_to_parent, | |
616 | .get_parent = f2fs_get_parent, | |
617 | }; | |
618 | ||
aff063e2 JK |
619 | static loff_t max_file_size(unsigned bits) |
620 | { | |
de93653f | 621 | loff_t result = (DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS); |
aff063e2 JK |
622 | loff_t leaf_count = ADDRS_PER_BLOCK; |
623 | ||
624 | /* two direct node blocks */ | |
625 | result += (leaf_count * 2); | |
626 | ||
627 | /* two indirect node blocks */ | |
628 | leaf_count *= NIDS_PER_BLOCK; | |
629 | result += (leaf_count * 2); | |
630 | ||
631 | /* one double indirect node block */ | |
632 | leaf_count *= NIDS_PER_BLOCK; | |
633 | result += leaf_count; | |
634 | ||
635 | result <<= bits; | |
636 | return result; | |
637 | } | |
638 | ||
a07ef784 NJ |
639 | static int sanity_check_raw_super(struct super_block *sb, |
640 | struct f2fs_super_block *raw_super) | |
aff063e2 JK |
641 | { |
642 | unsigned int blocksize; | |
643 | ||
a07ef784 NJ |
644 | if (F2FS_SUPER_MAGIC != le32_to_cpu(raw_super->magic)) { |
645 | f2fs_msg(sb, KERN_INFO, | |
646 | "Magic Mismatch, valid(0x%x) - read(0x%x)", | |
647 | F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic)); | |
aff063e2 | 648 | return 1; |
a07ef784 | 649 | } |
aff063e2 | 650 | |
5c9b4692 | 651 | /* Currently, support only 4KB page cache size */ |
652 | if (F2FS_BLKSIZE != PAGE_CACHE_SIZE) { | |
653 | f2fs_msg(sb, KERN_INFO, | |
14d7e9de | 654 | "Invalid page_cache_size (%lu), supports only 4KB\n", |
5c9b4692 | 655 | PAGE_CACHE_SIZE); |
656 | return 1; | |
657 | } | |
658 | ||
aff063e2 JK |
659 | /* Currently, support only 4KB block size */ |
660 | blocksize = 1 << le32_to_cpu(raw_super->log_blocksize); | |
5c9b4692 | 661 | if (blocksize != F2FS_BLKSIZE) { |
a07ef784 NJ |
662 | f2fs_msg(sb, KERN_INFO, |
663 | "Invalid blocksize (%u), supports only 4KB\n", | |
664 | blocksize); | |
aff063e2 | 665 | return 1; |
a07ef784 | 666 | } |
5c9b4692 | 667 | |
aff063e2 | 668 | if (le32_to_cpu(raw_super->log_sectorsize) != |
a07ef784 NJ |
669 | F2FS_LOG_SECTOR_SIZE) { |
670 | f2fs_msg(sb, KERN_INFO, "Invalid log sectorsize"); | |
aff063e2 | 671 | return 1; |
a07ef784 | 672 | } |
aff063e2 | 673 | if (le32_to_cpu(raw_super->log_sectors_per_block) != |
a07ef784 NJ |
674 | F2FS_LOG_SECTORS_PER_BLOCK) { |
675 | f2fs_msg(sb, KERN_INFO, "Invalid log sectors per block"); | |
aff063e2 | 676 | return 1; |
a07ef784 | 677 | } |
aff063e2 JK |
678 | return 0; |
679 | } | |
680 | ||
577e3495 | 681 | static int sanity_check_ckpt(struct f2fs_sb_info *sbi) |
aff063e2 JK |
682 | { |
683 | unsigned int total, fsmeta; | |
577e3495 JK |
684 | struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); |
685 | struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); | |
aff063e2 JK |
686 | |
687 | total = le32_to_cpu(raw_super->segment_count); | |
688 | fsmeta = le32_to_cpu(raw_super->segment_count_ckpt); | |
689 | fsmeta += le32_to_cpu(raw_super->segment_count_sit); | |
690 | fsmeta += le32_to_cpu(raw_super->segment_count_nat); | |
691 | fsmeta += le32_to_cpu(ckpt->rsvd_segment_count); | |
692 | fsmeta += le32_to_cpu(raw_super->segment_count_ssa); | |
693 | ||
694 | if (fsmeta >= total) | |
695 | return 1; | |
577e3495 JK |
696 | |
697 | if (is_set_ckpt_flags(ckpt, CP_ERROR_FLAG)) { | |
698 | f2fs_msg(sbi->sb, KERN_ERR, "A bug case: need to run fsck"); | |
699 | return 1; | |
700 | } | |
aff063e2 JK |
701 | return 0; |
702 | } | |
703 | ||
704 | static void init_sb_info(struct f2fs_sb_info *sbi) | |
705 | { | |
706 | struct f2fs_super_block *raw_super = sbi->raw_super; | |
707 | int i; | |
708 | ||
709 | sbi->log_sectors_per_block = | |
710 | le32_to_cpu(raw_super->log_sectors_per_block); | |
711 | sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize); | |
712 | sbi->blocksize = 1 << sbi->log_blocksize; | |
713 | sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg); | |
714 | sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg; | |
715 | sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec); | |
716 | sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone); | |
717 | sbi->total_sections = le32_to_cpu(raw_super->section_count); | |
718 | sbi->total_node_count = | |
719 | (le32_to_cpu(raw_super->segment_count_nat) / 2) | |
720 | * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK; | |
721 | sbi->root_ino_num = le32_to_cpu(raw_super->root_ino); | |
722 | sbi->node_ino_num = le32_to_cpu(raw_super->node_ino); | |
723 | sbi->meta_ino_num = le32_to_cpu(raw_super->meta_ino); | |
5ec4e49f | 724 | sbi->cur_victim_sec = NULL_SECNO; |
aff063e2 JK |
725 | |
726 | for (i = 0; i < NR_COUNT_TYPE; i++) | |
727 | atomic_set(&sbi->nr_pages[i], 0); | |
728 | } | |
729 | ||
14d7e9de | 730 | static int validate_superblock(struct super_block *sb, |
731 | struct f2fs_super_block **raw_super, | |
732 | struct buffer_head **raw_super_buf, sector_t block) | |
733 | { | |
734 | const char *super = (block == 0 ? "first" : "second"); | |
735 | ||
736 | /* read f2fs raw super block */ | |
737 | *raw_super_buf = sb_bread(sb, block); | |
738 | if (!*raw_super_buf) { | |
739 | f2fs_msg(sb, KERN_ERR, "unable to read %s superblock", | |
740 | super); | |
c0d39e65 | 741 | return -EIO; |
14d7e9de | 742 | } |
743 | ||
744 | *raw_super = (struct f2fs_super_block *) | |
745 | ((char *)(*raw_super_buf)->b_data + F2FS_SUPER_OFFSET); | |
746 | ||
747 | /* sanity checking of raw super */ | |
748 | if (!sanity_check_raw_super(sb, *raw_super)) | |
749 | return 0; | |
750 | ||
751 | f2fs_msg(sb, KERN_ERR, "Can't find a valid F2FS filesystem " | |
752 | "in %s superblock", super); | |
c0d39e65 | 753 | return -EINVAL; |
14d7e9de | 754 | } |
755 | ||
aff063e2 JK |
756 | static int f2fs_fill_super(struct super_block *sb, void *data, int silent) |
757 | { | |
758 | struct f2fs_sb_info *sbi; | |
759 | struct f2fs_super_block *raw_super; | |
760 | struct buffer_head *raw_super_buf; | |
761 | struct inode *root; | |
762 | long err = -EINVAL; | |
763 | int i; | |
764 | ||
765 | /* allocate memory for f2fs-specific super block info */ | |
766 | sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL); | |
767 | if (!sbi) | |
768 | return -ENOMEM; | |
769 | ||
ff9234ad | 770 | /* set a block size */ |
a07ef784 NJ |
771 | if (!sb_set_blocksize(sb, F2FS_BLKSIZE)) { |
772 | f2fs_msg(sb, KERN_ERR, "unable to set blocksize"); | |
aff063e2 | 773 | goto free_sbi; |
a07ef784 | 774 | } |
aff063e2 | 775 | |
c0d39e65 NJ |
776 | err = validate_superblock(sb, &raw_super, &raw_super_buf, 0); |
777 | if (err) { | |
14d7e9de | 778 | brelse(raw_super_buf); |
c0d39e65 NJ |
779 | /* check secondary superblock when primary failed */ |
780 | err = validate_superblock(sb, &raw_super, &raw_super_buf, 1); | |
781 | if (err) | |
14d7e9de | 782 | goto free_sb_buf; |
aff063e2 | 783 | } |
5fb08372 | 784 | sb->s_fs_info = sbi; |
aff063e2 JK |
785 | /* init some FS parameters */ |
786 | sbi->active_logs = NR_CURSEG_TYPE; | |
787 | ||
788 | set_opt(sbi, BG_GC); | |
789 | ||
790 | #ifdef CONFIG_F2FS_FS_XATTR | |
791 | set_opt(sbi, XATTR_USER); | |
792 | #endif | |
793 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
794 | set_opt(sbi, POSIX_ACL); | |
795 | #endif | |
796 | /* parse mount options */ | |
5fb08372 | 797 | err = parse_options(sb, (char *)data); |
66348b72 | 798 | if (err) |
aff063e2 JK |
799 | goto free_sb_buf; |
800 | ||
25ca923b | 801 | sb->s_maxbytes = max_file_size(le32_to_cpu(raw_super->log_blocksize)); |
aff063e2 JK |
802 | sb->s_max_links = F2FS_LINK_MAX; |
803 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
804 | ||
805 | sb->s_op = &f2fs_sops; | |
806 | sb->s_xattr = f2fs_xattr_handlers; | |
807 | sb->s_export_op = &f2fs_export_ops; | |
808 | sb->s_magic = F2FS_SUPER_MAGIC; | |
aff063e2 JK |
809 | sb->s_time_gran = 1; |
810 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
811 | (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0); | |
812 | memcpy(sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid)); | |
813 | ||
814 | /* init f2fs-specific super block info */ | |
815 | sbi->sb = sb; | |
816 | sbi->raw_super = raw_super; | |
817 | sbi->raw_super_buf = raw_super_buf; | |
818 | mutex_init(&sbi->gc_mutex); | |
aff063e2 JK |
819 | mutex_init(&sbi->writepages); |
820 | mutex_init(&sbi->cp_mutex); | |
39936837 | 821 | for (i = 0; i < NR_GLOBAL_LOCKS; i++) |
aff063e2 | 822 | mutex_init(&sbi->fs_lock[i]); |
39936837 | 823 | mutex_init(&sbi->node_write); |
aff063e2 JK |
824 | sbi->por_doing = 0; |
825 | spin_lock_init(&sbi->stat_lock); | |
826 | init_rwsem(&sbi->bio_sem); | |
827 | init_sb_info(sbi); | |
828 | ||
829 | /* get an inode for meta space */ | |
830 | sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi)); | |
831 | if (IS_ERR(sbi->meta_inode)) { | |
a07ef784 | 832 | f2fs_msg(sb, KERN_ERR, "Failed to read F2FS meta data inode"); |
aff063e2 JK |
833 | err = PTR_ERR(sbi->meta_inode); |
834 | goto free_sb_buf; | |
835 | } | |
836 | ||
837 | err = get_valid_checkpoint(sbi); | |
a07ef784 NJ |
838 | if (err) { |
839 | f2fs_msg(sb, KERN_ERR, "Failed to get valid F2FS checkpoint"); | |
aff063e2 | 840 | goto free_meta_inode; |
a07ef784 | 841 | } |
aff063e2 JK |
842 | |
843 | /* sanity checking of checkpoint */ | |
844 | err = -EINVAL; | |
577e3495 | 845 | if (sanity_check_ckpt(sbi)) { |
a07ef784 | 846 | f2fs_msg(sb, KERN_ERR, "Invalid F2FS checkpoint"); |
aff063e2 | 847 | goto free_cp; |
a07ef784 | 848 | } |
aff063e2 JK |
849 | |
850 | sbi->total_valid_node_count = | |
851 | le32_to_cpu(sbi->ckpt->valid_node_count); | |
852 | sbi->total_valid_inode_count = | |
853 | le32_to_cpu(sbi->ckpt->valid_inode_count); | |
854 | sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count); | |
855 | sbi->total_valid_block_count = | |
856 | le64_to_cpu(sbi->ckpt->valid_block_count); | |
857 | sbi->last_valid_block_count = sbi->total_valid_block_count; | |
858 | sbi->alloc_valid_block_count = 0; | |
859 | INIT_LIST_HEAD(&sbi->dir_inode_list); | |
860 | spin_lock_init(&sbi->dir_inode_lock); | |
861 | ||
aff063e2 JK |
862 | init_orphan_info(sbi); |
863 | ||
864 | /* setup f2fs internal modules */ | |
865 | err = build_segment_manager(sbi); | |
a07ef784 NJ |
866 | if (err) { |
867 | f2fs_msg(sb, KERN_ERR, | |
868 | "Failed to initialize F2FS segment manager"); | |
aff063e2 | 869 | goto free_sm; |
a07ef784 | 870 | } |
aff063e2 | 871 | err = build_node_manager(sbi); |
a07ef784 NJ |
872 | if (err) { |
873 | f2fs_msg(sb, KERN_ERR, | |
874 | "Failed to initialize F2FS node manager"); | |
aff063e2 | 875 | goto free_nm; |
a07ef784 | 876 | } |
aff063e2 JK |
877 | |
878 | build_gc_manager(sbi); | |
879 | ||
880 | /* get an inode for node space */ | |
881 | sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi)); | |
882 | if (IS_ERR(sbi->node_inode)) { | |
a07ef784 | 883 | f2fs_msg(sb, KERN_ERR, "Failed to read node inode"); |
aff063e2 JK |
884 | err = PTR_ERR(sbi->node_inode); |
885 | goto free_nm; | |
886 | } | |
887 | ||
888 | /* if there are nt orphan nodes free them */ | |
889 | err = -EINVAL; | |
30f0c758 | 890 | if (recover_orphan_inodes(sbi)) |
aff063e2 JK |
891 | goto free_node_inode; |
892 | ||
893 | /* read root inode and dentry */ | |
894 | root = f2fs_iget(sb, F2FS_ROOT_INO(sbi)); | |
895 | if (IS_ERR(root)) { | |
a07ef784 | 896 | f2fs_msg(sb, KERN_ERR, "Failed to read root inode"); |
aff063e2 JK |
897 | err = PTR_ERR(root); |
898 | goto free_node_inode; | |
899 | } | |
900 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) | |
901 | goto free_root_inode; | |
902 | ||
903 | sb->s_root = d_make_root(root); /* allocate root dentry */ | |
904 | if (!sb->s_root) { | |
905 | err = -ENOMEM; | |
906 | goto free_root_inode; | |
907 | } | |
908 | ||
909 | /* recover fsynced data */ | |
6ead1142 JK |
910 | if (!test_opt(sbi, DISABLE_ROLL_FORWARD)) { |
911 | err = recover_fsync_data(sbi); | |
bde582b2 CF |
912 | if (err) |
913 | f2fs_msg(sb, KERN_ERR, | |
914 | "Cannot recover all fsync data errno=%ld", err); | |
6ead1142 | 915 | } |
aff063e2 | 916 | |
696c018c NJ |
917 | /* |
918 | * If filesystem is not mounted as read-only then | |
919 | * do start the gc_thread. | |
920 | */ | |
921 | if (!(sb->s_flags & MS_RDONLY)) { | |
922 | /* After POR, we can run background GC thread.*/ | |
923 | err = start_gc_thread(sbi); | |
924 | if (err) | |
925 | goto fail; | |
926 | } | |
aff063e2 JK |
927 | |
928 | err = f2fs_build_stats(sbi); | |
929 | if (err) | |
930 | goto fail; | |
931 | ||
5e176d54 JK |
932 | if (f2fs_proc_root) |
933 | sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root); | |
934 | ||
935 | if (sbi->s_proc) | |
936 | proc_create_data("segment_info", S_IRUGO, sbi->s_proc, | |
937 | &f2fs_seq_segment_info_fops, sb); | |
938 | ||
d3ee456d NJ |
939 | if (test_opt(sbi, DISCARD)) { |
940 | struct request_queue *q = bdev_get_queue(sb->s_bdev); | |
941 | if (!blk_queue_discard(q)) | |
942 | f2fs_msg(sb, KERN_WARNING, | |
943 | "mounting with \"discard\" option, but " | |
944 | "the device does not support discard"); | |
945 | } | |
946 | ||
b59d0bae NJ |
947 | sbi->s_kobj.kset = f2fs_kset; |
948 | init_completion(&sbi->s_kobj_unregister); | |
949 | err = kobject_init_and_add(&sbi->s_kobj, &f2fs_ktype, NULL, | |
950 | "%s", sb->s_id); | |
951 | if (err) | |
952 | goto fail; | |
953 | ||
aff063e2 JK |
954 | return 0; |
955 | fail: | |
956 | stop_gc_thread(sbi); | |
957 | free_root_inode: | |
958 | dput(sb->s_root); | |
959 | sb->s_root = NULL; | |
960 | free_node_inode: | |
961 | iput(sbi->node_inode); | |
962 | free_nm: | |
963 | destroy_node_manager(sbi); | |
964 | free_sm: | |
965 | destroy_segment_manager(sbi); | |
966 | free_cp: | |
967 | kfree(sbi->ckpt); | |
968 | free_meta_inode: | |
969 | make_bad_inode(sbi->meta_inode); | |
970 | iput(sbi->meta_inode); | |
971 | free_sb_buf: | |
972 | brelse(raw_super_buf); | |
973 | free_sbi: | |
974 | kfree(sbi); | |
975 | return err; | |
976 | } | |
977 | ||
978 | static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags, | |
979 | const char *dev_name, void *data) | |
980 | { | |
981 | return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super); | |
982 | } | |
983 | ||
984 | static struct file_system_type f2fs_fs_type = { | |
985 | .owner = THIS_MODULE, | |
986 | .name = "f2fs", | |
987 | .mount = f2fs_mount, | |
988 | .kill_sb = kill_block_super, | |
989 | .fs_flags = FS_REQUIRES_DEV, | |
990 | }; | |
7f78e035 | 991 | MODULE_ALIAS_FS("f2fs"); |
aff063e2 | 992 | |
6e6093a8 | 993 | static int __init init_inodecache(void) |
aff063e2 JK |
994 | { |
995 | f2fs_inode_cachep = f2fs_kmem_cache_create("f2fs_inode_cache", | |
996 | sizeof(struct f2fs_inode_info), NULL); | |
997 | if (f2fs_inode_cachep == NULL) | |
998 | return -ENOMEM; | |
999 | return 0; | |
1000 | } | |
1001 | ||
1002 | static void destroy_inodecache(void) | |
1003 | { | |
1004 | /* | |
1005 | * Make sure all delayed rcu free inodes are flushed before we | |
1006 | * destroy cache. | |
1007 | */ | |
1008 | rcu_barrier(); | |
1009 | kmem_cache_destroy(f2fs_inode_cachep); | |
1010 | } | |
1011 | ||
1012 | static int __init init_f2fs_fs(void) | |
1013 | { | |
1014 | int err; | |
1015 | ||
1016 | err = init_inodecache(); | |
1017 | if (err) | |
1018 | goto fail; | |
1019 | err = create_node_manager_caches(); | |
1020 | if (err) | |
9890ff3f | 1021 | goto free_inodecache; |
aff063e2 JK |
1022 | err = create_gc_caches(); |
1023 | if (err) | |
9890ff3f | 1024 | goto free_node_manager_caches; |
aff063e2 JK |
1025 | err = create_checkpoint_caches(); |
1026 | if (err) | |
9890ff3f | 1027 | goto free_gc_caches; |
b59d0bae | 1028 | f2fs_kset = kset_create_and_add("f2fs", NULL, fs_kobj); |
6e6b978c WY |
1029 | if (!f2fs_kset) { |
1030 | err = -ENOMEM; | |
9890ff3f | 1031 | goto free_checkpoint_caches; |
6e6b978c | 1032 | } |
4589d25d NJ |
1033 | err = register_filesystem(&f2fs_fs_type); |
1034 | if (err) | |
9890ff3f | 1035 | goto free_kset; |
4589d25d | 1036 | f2fs_create_root_stats(); |
5e176d54 | 1037 | f2fs_proc_root = proc_mkdir("fs/f2fs", NULL); |
9890ff3f ZH |
1038 | return 0; |
1039 | ||
1040 | free_kset: | |
1041 | kset_unregister(f2fs_kset); | |
1042 | free_checkpoint_caches: | |
1043 | destroy_checkpoint_caches(); | |
1044 | free_gc_caches: | |
1045 | destroy_gc_caches(); | |
1046 | free_node_manager_caches: | |
1047 | destroy_node_manager_caches(); | |
1048 | free_inodecache: | |
1049 | destroy_inodecache(); | |
aff063e2 JK |
1050 | fail: |
1051 | return err; | |
1052 | } | |
1053 | ||
1054 | static void __exit exit_f2fs_fs(void) | |
1055 | { | |
5e176d54 | 1056 | remove_proc_entry("fs/f2fs", NULL); |
4589d25d | 1057 | f2fs_destroy_root_stats(); |
aff063e2 JK |
1058 | unregister_filesystem(&f2fs_fs_type); |
1059 | destroy_checkpoint_caches(); | |
1060 | destroy_gc_caches(); | |
1061 | destroy_node_manager_caches(); | |
1062 | destroy_inodecache(); | |
b59d0bae | 1063 | kset_unregister(f2fs_kset); |
aff063e2 JK |
1064 | } |
1065 | ||
1066 | module_init(init_f2fs_fs) | |
1067 | module_exit(exit_f2fs_fs) | |
1068 | ||
1069 | MODULE_AUTHOR("Samsung Electronics's Praesto Team"); | |
1070 | MODULE_DESCRIPTION("Flash Friendly File System"); | |
1071 | MODULE_LICENSE("GPL"); |