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