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, | |
4058c511 | 46 | Opt_user_xattr, |
aff063e2 | 47 | Opt_nouser_xattr, |
4058c511 | 48 | Opt_acl, |
aff063e2 JK |
49 | Opt_noacl, |
50 | Opt_active_logs, | |
51 | Opt_disable_ext_identify, | |
444c580f | 52 | Opt_inline_xattr, |
aff063e2 JK |
53 | Opt_err, |
54 | }; | |
55 | ||
56 | static match_table_t f2fs_tokens = { | |
696c018c | 57 | {Opt_gc_background, "background_gc=%s"}, |
aff063e2 JK |
58 | {Opt_disable_roll_forward, "disable_roll_forward"}, |
59 | {Opt_discard, "discard"}, | |
60 | {Opt_noheap, "no_heap"}, | |
4058c511 | 61 | {Opt_user_xattr, "user_xattr"}, |
aff063e2 | 62 | {Opt_nouser_xattr, "nouser_xattr"}, |
4058c511 | 63 | {Opt_acl, "acl"}, |
aff063e2 JK |
64 | {Opt_noacl, "noacl"}, |
65 | {Opt_active_logs, "active_logs=%u"}, | |
66 | {Opt_disable_ext_identify, "disable_ext_identify"}, | |
444c580f | 67 | {Opt_inline_xattr, "inline_xattr"}, |
aff063e2 JK |
68 | {Opt_err, NULL}, |
69 | }; | |
70 | ||
b59d0bae NJ |
71 | /* Sysfs support for f2fs */ |
72 | struct f2fs_attr { | |
73 | struct attribute attr; | |
74 | ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *); | |
75 | ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *, | |
76 | const char *, size_t); | |
77 | int offset; | |
78 | }; | |
79 | ||
80 | static ssize_t f2fs_sbi_show(struct f2fs_attr *a, | |
81 | struct f2fs_sb_info *sbi, char *buf) | |
82 | { | |
83 | struct f2fs_gc_kthread *gc_kth = sbi->gc_thread; | |
84 | unsigned int *ui; | |
85 | ||
86 | if (!gc_kth) | |
87 | return -EINVAL; | |
88 | ||
89 | ui = (unsigned int *)(((char *)gc_kth) + a->offset); | |
90 | ||
91 | return snprintf(buf, PAGE_SIZE, "%u\n", *ui); | |
92 | } | |
93 | ||
94 | static ssize_t f2fs_sbi_store(struct f2fs_attr *a, | |
95 | struct f2fs_sb_info *sbi, | |
96 | const char *buf, size_t count) | |
97 | { | |
98 | struct f2fs_gc_kthread *gc_kth = sbi->gc_thread; | |
99 | unsigned long t; | |
100 | unsigned int *ui; | |
101 | ssize_t ret; | |
102 | ||
103 | if (!gc_kth) | |
104 | return -EINVAL; | |
105 | ||
106 | ui = (unsigned int *)(((char *)gc_kth) + a->offset); | |
107 | ||
108 | ret = kstrtoul(skip_spaces(buf), 0, &t); | |
109 | if (ret < 0) | |
110 | return ret; | |
111 | *ui = t; | |
112 | return count; | |
113 | } | |
114 | ||
115 | static ssize_t f2fs_attr_show(struct kobject *kobj, | |
116 | struct attribute *attr, char *buf) | |
117 | { | |
118 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, | |
119 | s_kobj); | |
120 | struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); | |
121 | ||
122 | return a->show ? a->show(a, sbi, buf) : 0; | |
123 | } | |
124 | ||
125 | static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr, | |
126 | const char *buf, size_t len) | |
127 | { | |
128 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, | |
129 | s_kobj); | |
130 | struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); | |
131 | ||
132 | return a->store ? a->store(a, sbi, buf, len) : 0; | |
133 | } | |
134 | ||
135 | static void f2fs_sb_release(struct kobject *kobj) | |
136 | { | |
137 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, | |
138 | s_kobj); | |
139 | complete(&sbi->s_kobj_unregister); | |
140 | } | |
141 | ||
142 | #define F2FS_ATTR_OFFSET(_name, _mode, _show, _store, _elname) \ | |
143 | static struct f2fs_attr f2fs_attr_##_name = { \ | |
144 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
145 | .show = _show, \ | |
146 | .store = _store, \ | |
147 | .offset = offsetof(struct f2fs_gc_kthread, _elname), \ | |
148 | } | |
149 | ||
150 | #define F2FS_RW_ATTR(name, elname) \ | |
151 | F2FS_ATTR_OFFSET(name, 0644, f2fs_sbi_show, f2fs_sbi_store, elname) | |
152 | ||
153 | F2FS_RW_ATTR(gc_min_sleep_time, min_sleep_time); | |
154 | F2FS_RW_ATTR(gc_max_sleep_time, max_sleep_time); | |
155 | F2FS_RW_ATTR(gc_no_gc_sleep_time, no_gc_sleep_time); | |
d2dc095f | 156 | F2FS_RW_ATTR(gc_idle, gc_idle); |
b59d0bae NJ |
157 | |
158 | #define ATTR_LIST(name) (&f2fs_attr_##name.attr) | |
159 | static struct attribute *f2fs_attrs[] = { | |
160 | ATTR_LIST(gc_min_sleep_time), | |
161 | ATTR_LIST(gc_max_sleep_time), | |
162 | ATTR_LIST(gc_no_gc_sleep_time), | |
d2dc095f | 163 | ATTR_LIST(gc_idle), |
b59d0bae NJ |
164 | NULL, |
165 | }; | |
166 | ||
167 | static const struct sysfs_ops f2fs_attr_ops = { | |
168 | .show = f2fs_attr_show, | |
169 | .store = f2fs_attr_store, | |
170 | }; | |
171 | ||
172 | static struct kobj_type f2fs_ktype = { | |
173 | .default_attrs = f2fs_attrs, | |
174 | .sysfs_ops = &f2fs_attr_ops, | |
175 | .release = f2fs_sb_release, | |
176 | }; | |
177 | ||
a07ef784 NJ |
178 | void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...) |
179 | { | |
180 | struct va_format vaf; | |
181 | va_list args; | |
182 | ||
183 | va_start(args, fmt); | |
184 | vaf.fmt = fmt; | |
185 | vaf.va = &args; | |
186 | printk("%sF2FS-fs (%s): %pV\n", level, sb->s_id, &vaf); | |
187 | va_end(args); | |
188 | } | |
189 | ||
aff063e2 JK |
190 | static void init_once(void *foo) |
191 | { | |
192 | struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo; | |
193 | ||
aff063e2 JK |
194 | inode_init_once(&fi->vfs_inode); |
195 | } | |
196 | ||
696c018c NJ |
197 | static int parse_options(struct super_block *sb, char *options) |
198 | { | |
199 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
200 | substring_t args[MAX_OPT_ARGS]; | |
201 | char *p, *name; | |
202 | int arg = 0; | |
203 | ||
204 | if (!options) | |
205 | return 0; | |
206 | ||
207 | while ((p = strsep(&options, ",")) != NULL) { | |
208 | int token; | |
209 | if (!*p) | |
210 | continue; | |
211 | /* | |
212 | * Initialize args struct so we know whether arg was | |
213 | * found; some options take optional arguments. | |
214 | */ | |
215 | args[0].to = args[0].from = NULL; | |
216 | token = match_token(p, f2fs_tokens, args); | |
217 | ||
218 | switch (token) { | |
219 | case Opt_gc_background: | |
220 | name = match_strdup(&args[0]); | |
221 | ||
222 | if (!name) | |
223 | return -ENOMEM; | |
224 | if (!strncmp(name, "on", 2)) | |
225 | set_opt(sbi, BG_GC); | |
226 | else if (!strncmp(name, "off", 3)) | |
227 | clear_opt(sbi, BG_GC); | |
228 | else { | |
229 | kfree(name); | |
230 | return -EINVAL; | |
231 | } | |
232 | kfree(name); | |
233 | break; | |
234 | case Opt_disable_roll_forward: | |
235 | set_opt(sbi, DISABLE_ROLL_FORWARD); | |
236 | break; | |
237 | case Opt_discard: | |
238 | set_opt(sbi, DISCARD); | |
239 | break; | |
240 | case Opt_noheap: | |
241 | set_opt(sbi, NOHEAP); | |
242 | break; | |
243 | #ifdef CONFIG_F2FS_FS_XATTR | |
4058c511 KA |
244 | case Opt_user_xattr: |
245 | set_opt(sbi, XATTR_USER); | |
246 | break; | |
696c018c NJ |
247 | case Opt_nouser_xattr: |
248 | clear_opt(sbi, XATTR_USER); | |
249 | break; | |
444c580f JK |
250 | case Opt_inline_xattr: |
251 | set_opt(sbi, INLINE_XATTR); | |
252 | break; | |
696c018c | 253 | #else |
4058c511 KA |
254 | case Opt_user_xattr: |
255 | f2fs_msg(sb, KERN_INFO, | |
256 | "user_xattr options not supported"); | |
257 | break; | |
696c018c NJ |
258 | case Opt_nouser_xattr: |
259 | f2fs_msg(sb, KERN_INFO, | |
260 | "nouser_xattr options not supported"); | |
261 | break; | |
444c580f JK |
262 | case Opt_inline_xattr: |
263 | f2fs_msg(sb, KERN_INFO, | |
264 | "inline_xattr options not supported"); | |
265 | break; | |
696c018c NJ |
266 | #endif |
267 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
4058c511 KA |
268 | case Opt_acl: |
269 | set_opt(sbi, POSIX_ACL); | |
270 | break; | |
696c018c NJ |
271 | case Opt_noacl: |
272 | clear_opt(sbi, POSIX_ACL); | |
273 | break; | |
274 | #else | |
4058c511 KA |
275 | case Opt_acl: |
276 | f2fs_msg(sb, KERN_INFO, "acl options not supported"); | |
277 | break; | |
696c018c NJ |
278 | case Opt_noacl: |
279 | f2fs_msg(sb, KERN_INFO, "noacl options not supported"); | |
280 | break; | |
281 | #endif | |
282 | case Opt_active_logs: | |
283 | if (args->from && match_int(args, &arg)) | |
284 | return -EINVAL; | |
285 | if (arg != 2 && arg != 4 && arg != NR_CURSEG_TYPE) | |
286 | return -EINVAL; | |
287 | sbi->active_logs = arg; | |
288 | break; | |
289 | case Opt_disable_ext_identify: | |
290 | set_opt(sbi, DISABLE_EXT_IDENTIFY); | |
291 | break; | |
292 | default: | |
293 | f2fs_msg(sb, KERN_ERR, | |
294 | "Unrecognized mount option \"%s\" or missing value", | |
295 | p); | |
296 | return -EINVAL; | |
297 | } | |
298 | } | |
299 | return 0; | |
300 | } | |
301 | ||
aff063e2 JK |
302 | static struct inode *f2fs_alloc_inode(struct super_block *sb) |
303 | { | |
304 | struct f2fs_inode_info *fi; | |
305 | ||
306 | fi = kmem_cache_alloc(f2fs_inode_cachep, GFP_NOFS | __GFP_ZERO); | |
307 | if (!fi) | |
308 | return NULL; | |
309 | ||
310 | init_once((void *) fi); | |
311 | ||
434720fa | 312 | /* Initialize f2fs-specific inode info */ |
aff063e2 JK |
313 | fi->vfs_inode.i_version = 1; |
314 | atomic_set(&fi->dirty_dents, 0); | |
315 | fi->i_current_depth = 1; | |
316 | fi->i_advise = 0; | |
317 | rwlock_init(&fi->ext.ext_lock); | |
318 | ||
319 | set_inode_flag(fi, FI_NEW_INODE); | |
320 | ||
444c580f JK |
321 | if (test_opt(F2FS_SB(sb), INLINE_XATTR)) |
322 | set_inode_flag(fi, FI_INLINE_XATTR); | |
323 | ||
aff063e2 JK |
324 | return &fi->vfs_inode; |
325 | } | |
326 | ||
531ad7d5 JK |
327 | static int f2fs_drop_inode(struct inode *inode) |
328 | { | |
329 | /* | |
330 | * This is to avoid a deadlock condition like below. | |
331 | * writeback_single_inode(inode) | |
332 | * - f2fs_write_data_page | |
333 | * - f2fs_gc -> iput -> evict | |
334 | * - inode_wait_for_writeback(inode) | |
335 | */ | |
336 | if (!inode_unhashed(inode) && inode->i_state & I_SYNC) | |
337 | return 0; | |
338 | return generic_drop_inode(inode); | |
339 | } | |
340 | ||
b3783873 JK |
341 | /* |
342 | * f2fs_dirty_inode() is called from __mark_inode_dirty() | |
343 | * | |
344 | * We should call set_dirty_inode to write the dirty inode through write_inode. | |
345 | */ | |
346 | static void f2fs_dirty_inode(struct inode *inode, int flags) | |
347 | { | |
348 | set_inode_flag(F2FS_I(inode), FI_DIRTY_INODE); | |
b3783873 JK |
349 | } |
350 | ||
aff063e2 JK |
351 | static void f2fs_i_callback(struct rcu_head *head) |
352 | { | |
353 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
354 | kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode)); | |
355 | } | |
356 | ||
25ca923b | 357 | static void f2fs_destroy_inode(struct inode *inode) |
aff063e2 JK |
358 | { |
359 | call_rcu(&inode->i_rcu, f2fs_i_callback); | |
360 | } | |
361 | ||
362 | static void f2fs_put_super(struct super_block *sb) | |
363 | { | |
364 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
365 | ||
5e176d54 JK |
366 | if (sbi->s_proc) { |
367 | remove_proc_entry("segment_info", sbi->s_proc); | |
368 | remove_proc_entry(sb->s_id, f2fs_proc_root); | |
369 | } | |
b59d0bae | 370 | kobject_del(&sbi->s_kobj); |
5e176d54 | 371 | |
aff063e2 JK |
372 | f2fs_destroy_stats(sbi); |
373 | stop_gc_thread(sbi); | |
374 | ||
5887d291 JK |
375 | /* We don't need to do checkpoint when it's clean */ |
376 | if (sbi->s_dirty && get_pages(sbi, F2FS_DIRTY_NODES)) | |
377 | write_checkpoint(sbi, true); | |
aff063e2 JK |
378 | |
379 | iput(sbi->node_inode); | |
380 | iput(sbi->meta_inode); | |
381 | ||
382 | /* destroy f2fs internal modules */ | |
383 | destroy_node_manager(sbi); | |
384 | destroy_segment_manager(sbi); | |
385 | ||
386 | kfree(sbi->ckpt); | |
b59d0bae NJ |
387 | kobject_put(&sbi->s_kobj); |
388 | wait_for_completion(&sbi->s_kobj_unregister); | |
aff063e2 JK |
389 | |
390 | sb->s_fs_info = NULL; | |
391 | brelse(sbi->raw_super_buf); | |
392 | kfree(sbi); | |
393 | } | |
394 | ||
395 | int f2fs_sync_fs(struct super_block *sb, int sync) | |
396 | { | |
397 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
aff063e2 | 398 | |
a2a4a7e4 NJ |
399 | trace_f2fs_sync_fs(sb, sync); |
400 | ||
aff063e2 JK |
401 | if (!sbi->s_dirty && !get_pages(sbi, F2FS_DIRTY_NODES)) |
402 | return 0; | |
403 | ||
b7473754 JK |
404 | if (sync) { |
405 | mutex_lock(&sbi->gc_mutex); | |
43727527 | 406 | write_checkpoint(sbi, false); |
b7473754 JK |
407 | mutex_unlock(&sbi->gc_mutex); |
408 | } else { | |
7d82db83 | 409 | f2fs_balance_fs(sbi); |
b7473754 | 410 | } |
aff063e2 | 411 | |
64c576fe | 412 | return 0; |
aff063e2 JK |
413 | } |
414 | ||
d6212a5f CL |
415 | static int f2fs_freeze(struct super_block *sb) |
416 | { | |
417 | int err; | |
418 | ||
77888c1e | 419 | if (f2fs_readonly(sb)) |
d6212a5f CL |
420 | return 0; |
421 | ||
422 | err = f2fs_sync_fs(sb, 1); | |
423 | return err; | |
424 | } | |
425 | ||
426 | static int f2fs_unfreeze(struct super_block *sb) | |
427 | { | |
428 | return 0; | |
429 | } | |
430 | ||
aff063e2 JK |
431 | static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf) |
432 | { | |
433 | struct super_block *sb = dentry->d_sb; | |
434 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
435 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); | |
436 | block_t total_count, user_block_count, start_count, ovp_count; | |
437 | ||
438 | total_count = le64_to_cpu(sbi->raw_super->block_count); | |
439 | user_block_count = sbi->user_block_count; | |
440 | start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr); | |
441 | ovp_count = SM_I(sbi)->ovp_segments << sbi->log_blocks_per_seg; | |
442 | buf->f_type = F2FS_SUPER_MAGIC; | |
443 | buf->f_bsize = sbi->blocksize; | |
444 | ||
445 | buf->f_blocks = total_count - start_count; | |
446 | buf->f_bfree = buf->f_blocks - valid_user_blocks(sbi) - ovp_count; | |
447 | buf->f_bavail = user_block_count - valid_user_blocks(sbi); | |
448 | ||
1362b5e3 JK |
449 | buf->f_files = sbi->total_node_count; |
450 | buf->f_ffree = sbi->total_node_count - valid_inode_count(sbi); | |
aff063e2 | 451 | |
5a20d339 | 452 | buf->f_namelen = F2FS_NAME_LEN; |
aff063e2 JK |
453 | buf->f_fsid.val[0] = (u32)id; |
454 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
455 | ||
456 | return 0; | |
457 | } | |
458 | ||
459 | static int f2fs_show_options(struct seq_file *seq, struct dentry *root) | |
460 | { | |
461 | struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb); | |
462 | ||
696c018c NJ |
463 | if (!(root->d_sb->s_flags & MS_RDONLY) && test_opt(sbi, BG_GC)) |
464 | seq_printf(seq, ",background_gc=%s", "on"); | |
aff063e2 | 465 | else |
696c018c | 466 | seq_printf(seq, ",background_gc=%s", "off"); |
aff063e2 JK |
467 | if (test_opt(sbi, DISABLE_ROLL_FORWARD)) |
468 | seq_puts(seq, ",disable_roll_forward"); | |
469 | if (test_opt(sbi, DISCARD)) | |
470 | seq_puts(seq, ",discard"); | |
471 | if (test_opt(sbi, NOHEAP)) | |
472 | seq_puts(seq, ",no_heap_alloc"); | |
473 | #ifdef CONFIG_F2FS_FS_XATTR | |
474 | if (test_opt(sbi, XATTR_USER)) | |
475 | seq_puts(seq, ",user_xattr"); | |
476 | else | |
477 | seq_puts(seq, ",nouser_xattr"); | |
444c580f JK |
478 | if (test_opt(sbi, INLINE_XATTR)) |
479 | seq_puts(seq, ",inline_xattr"); | |
aff063e2 JK |
480 | #endif |
481 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
482 | if (test_opt(sbi, POSIX_ACL)) | |
483 | seq_puts(seq, ",acl"); | |
484 | else | |
485 | seq_puts(seq, ",noacl"); | |
486 | #endif | |
487 | if (test_opt(sbi, DISABLE_EXT_IDENTIFY)) | |
aa43507f | 488 | seq_puts(seq, ",disable_ext_identify"); |
aff063e2 JK |
489 | |
490 | seq_printf(seq, ",active_logs=%u", sbi->active_logs); | |
491 | ||
492 | return 0; | |
493 | } | |
494 | ||
5e176d54 JK |
495 | static int segment_info_seq_show(struct seq_file *seq, void *offset) |
496 | { | |
497 | struct super_block *sb = seq->private; | |
498 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
499 | unsigned int total_segs = le32_to_cpu(sbi->raw_super->segment_count_main); | |
500 | int i; | |
501 | ||
502 | for (i = 0; i < total_segs; i++) { | |
503 | seq_printf(seq, "%u", get_valid_blocks(sbi, i, 1)); | |
504 | if (i != 0 && (i % 10) == 0) | |
505 | seq_puts(seq, "\n"); | |
506 | else | |
507 | seq_puts(seq, " "); | |
508 | } | |
509 | return 0; | |
510 | } | |
511 | ||
512 | static int segment_info_open_fs(struct inode *inode, struct file *file) | |
513 | { | |
514 | return single_open(file, segment_info_seq_show, PDE_DATA(inode)); | |
515 | } | |
516 | ||
517 | static const struct file_operations f2fs_seq_segment_info_fops = { | |
518 | .owner = THIS_MODULE, | |
519 | .open = segment_info_open_fs, | |
520 | .read = seq_read, | |
521 | .llseek = seq_lseek, | |
522 | .release = single_release, | |
523 | }; | |
524 | ||
696c018c NJ |
525 | static int f2fs_remount(struct super_block *sb, int *flags, char *data) |
526 | { | |
527 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
528 | struct f2fs_mount_info org_mount_opt; | |
529 | int err, active_logs; | |
530 | ||
531 | /* | |
532 | * Save the old mount options in case we | |
533 | * need to restore them. | |
534 | */ | |
535 | org_mount_opt = sbi->mount_opt; | |
536 | active_logs = sbi->active_logs; | |
537 | ||
538 | /* parse mount options */ | |
539 | err = parse_options(sb, data); | |
540 | if (err) | |
541 | goto restore_opts; | |
542 | ||
543 | /* | |
544 | * Previous and new state of filesystem is RO, | |
545 | * so no point in checking GC conditions. | |
546 | */ | |
547 | if ((sb->s_flags & MS_RDONLY) && (*flags & MS_RDONLY)) | |
548 | goto skip; | |
549 | ||
550 | /* | |
551 | * We stop the GC thread if FS is mounted as RO | |
552 | * or if background_gc = off is passed in mount | |
553 | * option. Also sync the filesystem. | |
554 | */ | |
555 | if ((*flags & MS_RDONLY) || !test_opt(sbi, BG_GC)) { | |
556 | if (sbi->gc_thread) { | |
557 | stop_gc_thread(sbi); | |
558 | f2fs_sync_fs(sb, 1); | |
559 | } | |
560 | } else if (test_opt(sbi, BG_GC) && !sbi->gc_thread) { | |
561 | err = start_gc_thread(sbi); | |
562 | if (err) | |
563 | goto restore_opts; | |
564 | } | |
565 | skip: | |
566 | /* Update the POSIXACL Flag */ | |
567 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
568 | (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0); | |
569 | return 0; | |
570 | ||
571 | restore_opts: | |
572 | sbi->mount_opt = org_mount_opt; | |
573 | sbi->active_logs = active_logs; | |
574 | return err; | |
575 | } | |
576 | ||
aff063e2 JK |
577 | static struct super_operations f2fs_sops = { |
578 | .alloc_inode = f2fs_alloc_inode, | |
531ad7d5 | 579 | .drop_inode = f2fs_drop_inode, |
aff063e2 JK |
580 | .destroy_inode = f2fs_destroy_inode, |
581 | .write_inode = f2fs_write_inode, | |
b3783873 | 582 | .dirty_inode = f2fs_dirty_inode, |
aff063e2 JK |
583 | .show_options = f2fs_show_options, |
584 | .evict_inode = f2fs_evict_inode, | |
585 | .put_super = f2fs_put_super, | |
586 | .sync_fs = f2fs_sync_fs, | |
d6212a5f CL |
587 | .freeze_fs = f2fs_freeze, |
588 | .unfreeze_fs = f2fs_unfreeze, | |
aff063e2 | 589 | .statfs = f2fs_statfs, |
696c018c | 590 | .remount_fs = f2fs_remount, |
aff063e2 JK |
591 | }; |
592 | ||
593 | static struct inode *f2fs_nfs_get_inode(struct super_block *sb, | |
594 | u64 ino, u32 generation) | |
595 | { | |
596 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
597 | struct inode *inode; | |
598 | ||
599 | if (ino < F2FS_ROOT_INO(sbi)) | |
600 | return ERR_PTR(-ESTALE); | |
601 | ||
602 | /* | |
603 | * f2fs_iget isn't quite right if the inode is currently unallocated! | |
604 | * However f2fs_iget currently does appropriate checks to handle stale | |
605 | * inodes so everything is OK. | |
606 | */ | |
607 | inode = f2fs_iget(sb, ino); | |
608 | if (IS_ERR(inode)) | |
609 | return ERR_CAST(inode); | |
610 | if (generation && inode->i_generation != generation) { | |
611 | /* we didn't find the right inode.. */ | |
612 | iput(inode); | |
613 | return ERR_PTR(-ESTALE); | |
614 | } | |
615 | return inode; | |
616 | } | |
617 | ||
618 | static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
619 | int fh_len, int fh_type) | |
620 | { | |
621 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
622 | f2fs_nfs_get_inode); | |
623 | } | |
624 | ||
625 | static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid, | |
626 | int fh_len, int fh_type) | |
627 | { | |
628 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
629 | f2fs_nfs_get_inode); | |
630 | } | |
631 | ||
632 | static const struct export_operations f2fs_export_ops = { | |
633 | .fh_to_dentry = f2fs_fh_to_dentry, | |
634 | .fh_to_parent = f2fs_fh_to_parent, | |
635 | .get_parent = f2fs_get_parent, | |
636 | }; | |
637 | ||
aff063e2 JK |
638 | static loff_t max_file_size(unsigned bits) |
639 | { | |
de93653f | 640 | loff_t result = (DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS); |
aff063e2 JK |
641 | loff_t leaf_count = ADDRS_PER_BLOCK; |
642 | ||
643 | /* two direct node blocks */ | |
644 | result += (leaf_count * 2); | |
645 | ||
646 | /* two indirect node blocks */ | |
647 | leaf_count *= NIDS_PER_BLOCK; | |
648 | result += (leaf_count * 2); | |
649 | ||
650 | /* one double indirect node block */ | |
651 | leaf_count *= NIDS_PER_BLOCK; | |
652 | result += leaf_count; | |
653 | ||
654 | result <<= bits; | |
655 | return result; | |
656 | } | |
657 | ||
a07ef784 NJ |
658 | static int sanity_check_raw_super(struct super_block *sb, |
659 | struct f2fs_super_block *raw_super) | |
aff063e2 JK |
660 | { |
661 | unsigned int blocksize; | |
662 | ||
a07ef784 NJ |
663 | if (F2FS_SUPER_MAGIC != le32_to_cpu(raw_super->magic)) { |
664 | f2fs_msg(sb, KERN_INFO, | |
665 | "Magic Mismatch, valid(0x%x) - read(0x%x)", | |
666 | F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic)); | |
aff063e2 | 667 | return 1; |
a07ef784 | 668 | } |
aff063e2 | 669 | |
5c9b4692 | 670 | /* Currently, support only 4KB page cache size */ |
671 | if (F2FS_BLKSIZE != PAGE_CACHE_SIZE) { | |
672 | f2fs_msg(sb, KERN_INFO, | |
14d7e9de | 673 | "Invalid page_cache_size (%lu), supports only 4KB\n", |
5c9b4692 | 674 | PAGE_CACHE_SIZE); |
675 | return 1; | |
676 | } | |
677 | ||
aff063e2 JK |
678 | /* Currently, support only 4KB block size */ |
679 | blocksize = 1 << le32_to_cpu(raw_super->log_blocksize); | |
5c9b4692 | 680 | if (blocksize != F2FS_BLKSIZE) { |
a07ef784 NJ |
681 | f2fs_msg(sb, KERN_INFO, |
682 | "Invalid blocksize (%u), supports only 4KB\n", | |
683 | blocksize); | |
aff063e2 | 684 | return 1; |
a07ef784 | 685 | } |
5c9b4692 | 686 | |
aff063e2 | 687 | if (le32_to_cpu(raw_super->log_sectorsize) != |
a07ef784 NJ |
688 | F2FS_LOG_SECTOR_SIZE) { |
689 | f2fs_msg(sb, KERN_INFO, "Invalid log sectorsize"); | |
aff063e2 | 690 | return 1; |
a07ef784 | 691 | } |
aff063e2 | 692 | if (le32_to_cpu(raw_super->log_sectors_per_block) != |
a07ef784 NJ |
693 | F2FS_LOG_SECTORS_PER_BLOCK) { |
694 | f2fs_msg(sb, KERN_INFO, "Invalid log sectors per block"); | |
aff063e2 | 695 | return 1; |
a07ef784 | 696 | } |
aff063e2 JK |
697 | return 0; |
698 | } | |
699 | ||
577e3495 | 700 | static int sanity_check_ckpt(struct f2fs_sb_info *sbi) |
aff063e2 JK |
701 | { |
702 | unsigned int total, fsmeta; | |
577e3495 JK |
703 | struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); |
704 | struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); | |
aff063e2 JK |
705 | |
706 | total = le32_to_cpu(raw_super->segment_count); | |
707 | fsmeta = le32_to_cpu(raw_super->segment_count_ckpt); | |
708 | fsmeta += le32_to_cpu(raw_super->segment_count_sit); | |
709 | fsmeta += le32_to_cpu(raw_super->segment_count_nat); | |
710 | fsmeta += le32_to_cpu(ckpt->rsvd_segment_count); | |
711 | fsmeta += le32_to_cpu(raw_super->segment_count_ssa); | |
712 | ||
713 | if (fsmeta >= total) | |
714 | return 1; | |
577e3495 JK |
715 | |
716 | if (is_set_ckpt_flags(ckpt, CP_ERROR_FLAG)) { | |
717 | f2fs_msg(sbi->sb, KERN_ERR, "A bug case: need to run fsck"); | |
718 | return 1; | |
719 | } | |
aff063e2 JK |
720 | return 0; |
721 | } | |
722 | ||
723 | static void init_sb_info(struct f2fs_sb_info *sbi) | |
724 | { | |
725 | struct f2fs_super_block *raw_super = sbi->raw_super; | |
726 | int i; | |
727 | ||
728 | sbi->log_sectors_per_block = | |
729 | le32_to_cpu(raw_super->log_sectors_per_block); | |
730 | sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize); | |
731 | sbi->blocksize = 1 << sbi->log_blocksize; | |
732 | sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg); | |
733 | sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg; | |
734 | sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec); | |
735 | sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone); | |
736 | sbi->total_sections = le32_to_cpu(raw_super->section_count); | |
737 | sbi->total_node_count = | |
738 | (le32_to_cpu(raw_super->segment_count_nat) / 2) | |
739 | * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK; | |
740 | sbi->root_ino_num = le32_to_cpu(raw_super->root_ino); | |
741 | sbi->node_ino_num = le32_to_cpu(raw_super->node_ino); | |
742 | sbi->meta_ino_num = le32_to_cpu(raw_super->meta_ino); | |
5ec4e49f | 743 | sbi->cur_victim_sec = NULL_SECNO; |
aff063e2 JK |
744 | |
745 | for (i = 0; i < NR_COUNT_TYPE; i++) | |
746 | atomic_set(&sbi->nr_pages[i], 0); | |
747 | } | |
748 | ||
9076a75f GZ |
749 | /* |
750 | * Read f2fs raw super block. | |
751 | * Because we have two copies of super block, so read the first one at first, | |
752 | * if the first one is invalid, move to read the second one. | |
753 | */ | |
754 | static int read_raw_super_block(struct super_block *sb, | |
755 | struct f2fs_super_block **raw_super, | |
756 | struct buffer_head **raw_super_buf) | |
14d7e9de | 757 | { |
9076a75f | 758 | int block = 0; |
14d7e9de | 759 | |
9076a75f | 760 | retry: |
14d7e9de | 761 | *raw_super_buf = sb_bread(sb, block); |
762 | if (!*raw_super_buf) { | |
9076a75f GZ |
763 | f2fs_msg(sb, KERN_ERR, "Unable to read %dth superblock", |
764 | block + 1); | |
765 | if (block == 0) { | |
766 | block++; | |
767 | goto retry; | |
768 | } else { | |
769 | return -EIO; | |
770 | } | |
14d7e9de | 771 | } |
772 | ||
773 | *raw_super = (struct f2fs_super_block *) | |
774 | ((char *)(*raw_super_buf)->b_data + F2FS_SUPER_OFFSET); | |
775 | ||
776 | /* sanity checking of raw super */ | |
9076a75f GZ |
777 | if (sanity_check_raw_super(sb, *raw_super)) { |
778 | brelse(*raw_super_buf); | |
779 | f2fs_msg(sb, KERN_ERR, "Can't find a valid F2FS filesystem " | |
780 | "in %dth superblock", block + 1); | |
781 | if(block == 0) { | |
782 | block++; | |
783 | goto retry; | |
784 | } else { | |
785 | return -EINVAL; | |
786 | } | |
787 | } | |
14d7e9de | 788 | |
9076a75f | 789 | return 0; |
14d7e9de | 790 | } |
791 | ||
aff063e2 JK |
792 | static int f2fs_fill_super(struct super_block *sb, void *data, int silent) |
793 | { | |
794 | struct f2fs_sb_info *sbi; | |
795 | struct f2fs_super_block *raw_super; | |
796 | struct buffer_head *raw_super_buf; | |
797 | struct inode *root; | |
798 | long err = -EINVAL; | |
aff063e2 JK |
799 | |
800 | /* allocate memory for f2fs-specific super block info */ | |
801 | sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL); | |
802 | if (!sbi) | |
803 | return -ENOMEM; | |
804 | ||
ff9234ad | 805 | /* set a block size */ |
a07ef784 NJ |
806 | if (!sb_set_blocksize(sb, F2FS_BLKSIZE)) { |
807 | f2fs_msg(sb, KERN_ERR, "unable to set blocksize"); | |
aff063e2 | 808 | goto free_sbi; |
a07ef784 | 809 | } |
aff063e2 | 810 | |
9076a75f GZ |
811 | err = read_raw_super_block(sb, &raw_super, &raw_super_buf); |
812 | if (err) | |
813 | goto free_sbi; | |
814 | ||
5fb08372 | 815 | sb->s_fs_info = sbi; |
aff063e2 JK |
816 | /* init some FS parameters */ |
817 | sbi->active_logs = NR_CURSEG_TYPE; | |
818 | ||
819 | set_opt(sbi, BG_GC); | |
820 | ||
821 | #ifdef CONFIG_F2FS_FS_XATTR | |
822 | set_opt(sbi, XATTR_USER); | |
823 | #endif | |
824 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
825 | set_opt(sbi, POSIX_ACL); | |
826 | #endif | |
827 | /* parse mount options */ | |
5fb08372 | 828 | err = parse_options(sb, (char *)data); |
66348b72 | 829 | if (err) |
aff063e2 JK |
830 | goto free_sb_buf; |
831 | ||
25ca923b | 832 | sb->s_maxbytes = max_file_size(le32_to_cpu(raw_super->log_blocksize)); |
aff063e2 JK |
833 | sb->s_max_links = F2FS_LINK_MAX; |
834 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
835 | ||
836 | sb->s_op = &f2fs_sops; | |
837 | sb->s_xattr = f2fs_xattr_handlers; | |
838 | sb->s_export_op = &f2fs_export_ops; | |
839 | sb->s_magic = F2FS_SUPER_MAGIC; | |
aff063e2 JK |
840 | sb->s_time_gran = 1; |
841 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
842 | (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0); | |
843 | memcpy(sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid)); | |
844 | ||
845 | /* init f2fs-specific super block info */ | |
846 | sbi->sb = sb; | |
847 | sbi->raw_super = raw_super; | |
848 | sbi->raw_super_buf = raw_super_buf; | |
849 | mutex_init(&sbi->gc_mutex); | |
aff063e2 JK |
850 | mutex_init(&sbi->writepages); |
851 | mutex_init(&sbi->cp_mutex); | |
39936837 | 852 | mutex_init(&sbi->node_write); |
aabe5136 | 853 | sbi->por_doing = false; |
aff063e2 JK |
854 | spin_lock_init(&sbi->stat_lock); |
855 | init_rwsem(&sbi->bio_sem); | |
e479556b | 856 | init_rwsem(&sbi->cp_rwsem); |
aff063e2 JK |
857 | init_sb_info(sbi); |
858 | ||
859 | /* get an inode for meta space */ | |
860 | sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi)); | |
861 | if (IS_ERR(sbi->meta_inode)) { | |
a07ef784 | 862 | f2fs_msg(sb, KERN_ERR, "Failed to read F2FS meta data inode"); |
aff063e2 JK |
863 | err = PTR_ERR(sbi->meta_inode); |
864 | goto free_sb_buf; | |
865 | } | |
866 | ||
867 | err = get_valid_checkpoint(sbi); | |
a07ef784 NJ |
868 | if (err) { |
869 | f2fs_msg(sb, KERN_ERR, "Failed to get valid F2FS checkpoint"); | |
aff063e2 | 870 | goto free_meta_inode; |
a07ef784 | 871 | } |
aff063e2 JK |
872 | |
873 | /* sanity checking of checkpoint */ | |
874 | err = -EINVAL; | |
577e3495 | 875 | if (sanity_check_ckpt(sbi)) { |
a07ef784 | 876 | f2fs_msg(sb, KERN_ERR, "Invalid F2FS checkpoint"); |
aff063e2 | 877 | goto free_cp; |
a07ef784 | 878 | } |
aff063e2 JK |
879 | |
880 | sbi->total_valid_node_count = | |
881 | le32_to_cpu(sbi->ckpt->valid_node_count); | |
882 | sbi->total_valid_inode_count = | |
883 | le32_to_cpu(sbi->ckpt->valid_inode_count); | |
884 | sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count); | |
885 | sbi->total_valid_block_count = | |
886 | le64_to_cpu(sbi->ckpt->valid_block_count); | |
887 | sbi->last_valid_block_count = sbi->total_valid_block_count; | |
888 | sbi->alloc_valid_block_count = 0; | |
889 | INIT_LIST_HEAD(&sbi->dir_inode_list); | |
890 | spin_lock_init(&sbi->dir_inode_lock); | |
891 | ||
aff063e2 JK |
892 | init_orphan_info(sbi); |
893 | ||
894 | /* setup f2fs internal modules */ | |
895 | err = build_segment_manager(sbi); | |
a07ef784 NJ |
896 | if (err) { |
897 | f2fs_msg(sb, KERN_ERR, | |
898 | "Failed to initialize F2FS segment manager"); | |
aff063e2 | 899 | goto free_sm; |
a07ef784 | 900 | } |
aff063e2 | 901 | err = build_node_manager(sbi); |
a07ef784 NJ |
902 | if (err) { |
903 | f2fs_msg(sb, KERN_ERR, | |
904 | "Failed to initialize F2FS node manager"); | |
aff063e2 | 905 | goto free_nm; |
a07ef784 | 906 | } |
aff063e2 JK |
907 | |
908 | build_gc_manager(sbi); | |
909 | ||
910 | /* get an inode for node space */ | |
911 | sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi)); | |
912 | if (IS_ERR(sbi->node_inode)) { | |
a07ef784 | 913 | f2fs_msg(sb, KERN_ERR, "Failed to read node inode"); |
aff063e2 JK |
914 | err = PTR_ERR(sbi->node_inode); |
915 | goto free_nm; | |
916 | } | |
917 | ||
918 | /* if there are nt orphan nodes free them */ | |
919 | err = -EINVAL; | |
30f0c758 | 920 | if (recover_orphan_inodes(sbi)) |
aff063e2 JK |
921 | goto free_node_inode; |
922 | ||
923 | /* read root inode and dentry */ | |
924 | root = f2fs_iget(sb, F2FS_ROOT_INO(sbi)); | |
925 | if (IS_ERR(root)) { | |
a07ef784 | 926 | f2fs_msg(sb, KERN_ERR, "Failed to read root inode"); |
aff063e2 JK |
927 | err = PTR_ERR(root); |
928 | goto free_node_inode; | |
929 | } | |
930 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) | |
931 | goto free_root_inode; | |
932 | ||
933 | sb->s_root = d_make_root(root); /* allocate root dentry */ | |
934 | if (!sb->s_root) { | |
935 | err = -ENOMEM; | |
936 | goto free_root_inode; | |
937 | } | |
938 | ||
939 | /* recover fsynced data */ | |
6ead1142 JK |
940 | if (!test_opt(sbi, DISABLE_ROLL_FORWARD)) { |
941 | err = recover_fsync_data(sbi); | |
bde582b2 CF |
942 | if (err) |
943 | f2fs_msg(sb, KERN_ERR, | |
944 | "Cannot recover all fsync data errno=%ld", err); | |
6ead1142 | 945 | } |
aff063e2 | 946 | |
696c018c NJ |
947 | /* |
948 | * If filesystem is not mounted as read-only then | |
949 | * do start the gc_thread. | |
950 | */ | |
951 | if (!(sb->s_flags & MS_RDONLY)) { | |
952 | /* After POR, we can run background GC thread.*/ | |
953 | err = start_gc_thread(sbi); | |
954 | if (err) | |
955 | goto fail; | |
956 | } | |
aff063e2 JK |
957 | |
958 | err = f2fs_build_stats(sbi); | |
959 | if (err) | |
960 | goto fail; | |
961 | ||
5e176d54 JK |
962 | if (f2fs_proc_root) |
963 | sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root); | |
964 | ||
965 | if (sbi->s_proc) | |
966 | proc_create_data("segment_info", S_IRUGO, sbi->s_proc, | |
967 | &f2fs_seq_segment_info_fops, sb); | |
968 | ||
d3ee456d NJ |
969 | if (test_opt(sbi, DISCARD)) { |
970 | struct request_queue *q = bdev_get_queue(sb->s_bdev); | |
971 | if (!blk_queue_discard(q)) | |
972 | f2fs_msg(sb, KERN_WARNING, | |
973 | "mounting with \"discard\" option, but " | |
974 | "the device does not support discard"); | |
975 | } | |
976 | ||
b59d0bae NJ |
977 | sbi->s_kobj.kset = f2fs_kset; |
978 | init_completion(&sbi->s_kobj_unregister); | |
979 | err = kobject_init_and_add(&sbi->s_kobj, &f2fs_ktype, NULL, | |
980 | "%s", sb->s_id); | |
981 | if (err) | |
982 | goto fail; | |
983 | ||
aff063e2 JK |
984 | return 0; |
985 | fail: | |
986 | stop_gc_thread(sbi); | |
987 | free_root_inode: | |
988 | dput(sb->s_root); | |
989 | sb->s_root = NULL; | |
990 | free_node_inode: | |
991 | iput(sbi->node_inode); | |
992 | free_nm: | |
993 | destroy_node_manager(sbi); | |
994 | free_sm: | |
995 | destroy_segment_manager(sbi); | |
996 | free_cp: | |
997 | kfree(sbi->ckpt); | |
998 | free_meta_inode: | |
999 | make_bad_inode(sbi->meta_inode); | |
1000 | iput(sbi->meta_inode); | |
1001 | free_sb_buf: | |
1002 | brelse(raw_super_buf); | |
1003 | free_sbi: | |
1004 | kfree(sbi); | |
1005 | return err; | |
1006 | } | |
1007 | ||
1008 | static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags, | |
1009 | const char *dev_name, void *data) | |
1010 | { | |
1011 | return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super); | |
1012 | } | |
1013 | ||
1014 | static struct file_system_type f2fs_fs_type = { | |
1015 | .owner = THIS_MODULE, | |
1016 | .name = "f2fs", | |
1017 | .mount = f2fs_mount, | |
1018 | .kill_sb = kill_block_super, | |
1019 | .fs_flags = FS_REQUIRES_DEV, | |
1020 | }; | |
7f78e035 | 1021 | MODULE_ALIAS_FS("f2fs"); |
aff063e2 | 1022 | |
6e6093a8 | 1023 | static int __init init_inodecache(void) |
aff063e2 JK |
1024 | { |
1025 | f2fs_inode_cachep = f2fs_kmem_cache_create("f2fs_inode_cache", | |
1026 | sizeof(struct f2fs_inode_info), NULL); | |
1027 | if (f2fs_inode_cachep == NULL) | |
1028 | return -ENOMEM; | |
1029 | return 0; | |
1030 | } | |
1031 | ||
1032 | static void destroy_inodecache(void) | |
1033 | { | |
1034 | /* | |
1035 | * Make sure all delayed rcu free inodes are flushed before we | |
1036 | * destroy cache. | |
1037 | */ | |
1038 | rcu_barrier(); | |
1039 | kmem_cache_destroy(f2fs_inode_cachep); | |
1040 | } | |
1041 | ||
1042 | static int __init init_f2fs_fs(void) | |
1043 | { | |
1044 | int err; | |
1045 | ||
1046 | err = init_inodecache(); | |
1047 | if (err) | |
1048 | goto fail; | |
1049 | err = create_node_manager_caches(); | |
1050 | if (err) | |
9890ff3f | 1051 | goto free_inodecache; |
aff063e2 JK |
1052 | err = create_gc_caches(); |
1053 | if (err) | |
9890ff3f | 1054 | goto free_node_manager_caches; |
aff063e2 JK |
1055 | err = create_checkpoint_caches(); |
1056 | if (err) | |
9890ff3f | 1057 | goto free_gc_caches; |
b59d0bae | 1058 | f2fs_kset = kset_create_and_add("f2fs", NULL, fs_kobj); |
6e6b978c WY |
1059 | if (!f2fs_kset) { |
1060 | err = -ENOMEM; | |
9890ff3f | 1061 | goto free_checkpoint_caches; |
6e6b978c | 1062 | } |
4589d25d NJ |
1063 | err = register_filesystem(&f2fs_fs_type); |
1064 | if (err) | |
9890ff3f | 1065 | goto free_kset; |
4589d25d | 1066 | f2fs_create_root_stats(); |
5e176d54 | 1067 | f2fs_proc_root = proc_mkdir("fs/f2fs", NULL); |
9890ff3f ZH |
1068 | return 0; |
1069 | ||
1070 | free_kset: | |
1071 | kset_unregister(f2fs_kset); | |
1072 | free_checkpoint_caches: | |
1073 | destroy_checkpoint_caches(); | |
1074 | free_gc_caches: | |
1075 | destroy_gc_caches(); | |
1076 | free_node_manager_caches: | |
1077 | destroy_node_manager_caches(); | |
1078 | free_inodecache: | |
1079 | destroy_inodecache(); | |
aff063e2 JK |
1080 | fail: |
1081 | return err; | |
1082 | } | |
1083 | ||
1084 | static void __exit exit_f2fs_fs(void) | |
1085 | { | |
5e176d54 | 1086 | remove_proc_entry("fs/f2fs", NULL); |
4589d25d | 1087 | f2fs_destroy_root_stats(); |
aff063e2 JK |
1088 | unregister_filesystem(&f2fs_fs_type); |
1089 | destroy_checkpoint_caches(); | |
1090 | destroy_gc_caches(); | |
1091 | destroy_node_manager_caches(); | |
1092 | destroy_inodecache(); | |
b59d0bae | 1093 | kset_unregister(f2fs_kset); |
aff063e2 JK |
1094 | } |
1095 | ||
1096 | module_init(init_f2fs_fs) | |
1097 | module_exit(exit_f2fs_fs) | |
1098 | ||
1099 | MODULE_AUTHOR("Samsung Electronics's Praesto Team"); | |
1100 | MODULE_DESCRIPTION("Flash Friendly File System"); | |
1101 | MODULE_LICENSE("GPL"); |