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" |
db9f7c1a | 33 | #include "trace.h" |
aff063e2 | 34 | |
a2a4a7e4 NJ |
35 | #define CREATE_TRACE_POINTS |
36 | #include <trace/events/f2fs.h> | |
37 | ||
5e176d54 | 38 | static struct proc_dir_entry *f2fs_proc_root; |
aff063e2 | 39 | static struct kmem_cache *f2fs_inode_cachep; |
b59d0bae | 40 | static struct kset *f2fs_kset; |
aff063e2 JK |
41 | |
42 | enum { | |
696c018c | 43 | Opt_gc_background, |
aff063e2 | 44 | Opt_disable_roll_forward, |
2d834bf9 | 45 | Opt_norecovery, |
aff063e2 JK |
46 | Opt_discard, |
47 | Opt_noheap, | |
4058c511 | 48 | Opt_user_xattr, |
aff063e2 | 49 | Opt_nouser_xattr, |
4058c511 | 50 | Opt_acl, |
aff063e2 JK |
51 | Opt_noacl, |
52 | Opt_active_logs, | |
53 | Opt_disable_ext_identify, | |
444c580f | 54 | Opt_inline_xattr, |
8274de77 | 55 | Opt_inline_data, |
5efd3c6f | 56 | Opt_inline_dentry, |
6b4afdd7 | 57 | Opt_flush_merge, |
0f7b2abd | 58 | Opt_nobarrier, |
d5053a34 | 59 | Opt_fastboot, |
89672159 | 60 | Opt_extent_cache, |
75342797 | 61 | Opt_noinline_data, |
aff063e2 JK |
62 | Opt_err, |
63 | }; | |
64 | ||
65 | static match_table_t f2fs_tokens = { | |
696c018c | 66 | {Opt_gc_background, "background_gc=%s"}, |
aff063e2 | 67 | {Opt_disable_roll_forward, "disable_roll_forward"}, |
2d834bf9 | 68 | {Opt_norecovery, "norecovery"}, |
aff063e2 JK |
69 | {Opt_discard, "discard"}, |
70 | {Opt_noheap, "no_heap"}, | |
4058c511 | 71 | {Opt_user_xattr, "user_xattr"}, |
aff063e2 | 72 | {Opt_nouser_xattr, "nouser_xattr"}, |
4058c511 | 73 | {Opt_acl, "acl"}, |
aff063e2 JK |
74 | {Opt_noacl, "noacl"}, |
75 | {Opt_active_logs, "active_logs=%u"}, | |
76 | {Opt_disable_ext_identify, "disable_ext_identify"}, | |
444c580f | 77 | {Opt_inline_xattr, "inline_xattr"}, |
8274de77 | 78 | {Opt_inline_data, "inline_data"}, |
5efd3c6f | 79 | {Opt_inline_dentry, "inline_dentry"}, |
6b4afdd7 | 80 | {Opt_flush_merge, "flush_merge"}, |
0f7b2abd | 81 | {Opt_nobarrier, "nobarrier"}, |
d5053a34 | 82 | {Opt_fastboot, "fastboot"}, |
89672159 | 83 | {Opt_extent_cache, "extent_cache"}, |
75342797 | 84 | {Opt_noinline_data, "noinline_data"}, |
aff063e2 JK |
85 | {Opt_err, NULL}, |
86 | }; | |
87 | ||
b59d0bae | 88 | /* Sysfs support for f2fs */ |
ea91e9b0 JK |
89 | enum { |
90 | GC_THREAD, /* struct f2fs_gc_thread */ | |
91 | SM_INFO, /* struct f2fs_sm_info */ | |
cdfc41c1 | 92 | NM_INFO, /* struct f2fs_nm_info */ |
b1c57c1c | 93 | F2FS_SBI, /* struct f2fs_sb_info */ |
ea91e9b0 JK |
94 | }; |
95 | ||
b59d0bae NJ |
96 | struct f2fs_attr { |
97 | struct attribute attr; | |
98 | ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *); | |
99 | ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *, | |
100 | const char *, size_t); | |
ea91e9b0 | 101 | int struct_type; |
b59d0bae NJ |
102 | int offset; |
103 | }; | |
104 | ||
ea91e9b0 JK |
105 | static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type) |
106 | { | |
107 | if (struct_type == GC_THREAD) | |
108 | return (unsigned char *)sbi->gc_thread; | |
109 | else if (struct_type == SM_INFO) | |
110 | return (unsigned char *)SM_I(sbi); | |
cdfc41c1 JK |
111 | else if (struct_type == NM_INFO) |
112 | return (unsigned char *)NM_I(sbi); | |
b1c57c1c JK |
113 | else if (struct_type == F2FS_SBI) |
114 | return (unsigned char *)sbi; | |
ea91e9b0 JK |
115 | return NULL; |
116 | } | |
117 | ||
b59d0bae NJ |
118 | static ssize_t f2fs_sbi_show(struct f2fs_attr *a, |
119 | struct f2fs_sb_info *sbi, char *buf) | |
120 | { | |
ea91e9b0 | 121 | unsigned char *ptr = NULL; |
b59d0bae NJ |
122 | unsigned int *ui; |
123 | ||
ea91e9b0 JK |
124 | ptr = __struct_ptr(sbi, a->struct_type); |
125 | if (!ptr) | |
b59d0bae NJ |
126 | return -EINVAL; |
127 | ||
ea91e9b0 | 128 | ui = (unsigned int *)(ptr + a->offset); |
b59d0bae NJ |
129 | |
130 | return snprintf(buf, PAGE_SIZE, "%u\n", *ui); | |
131 | } | |
132 | ||
133 | static ssize_t f2fs_sbi_store(struct f2fs_attr *a, | |
134 | struct f2fs_sb_info *sbi, | |
135 | const char *buf, size_t count) | |
136 | { | |
ea91e9b0 | 137 | unsigned char *ptr; |
b59d0bae NJ |
138 | unsigned long t; |
139 | unsigned int *ui; | |
140 | ssize_t ret; | |
141 | ||
ea91e9b0 JK |
142 | ptr = __struct_ptr(sbi, a->struct_type); |
143 | if (!ptr) | |
b59d0bae NJ |
144 | return -EINVAL; |
145 | ||
ea91e9b0 | 146 | ui = (unsigned int *)(ptr + a->offset); |
b59d0bae NJ |
147 | |
148 | ret = kstrtoul(skip_spaces(buf), 0, &t); | |
149 | if (ret < 0) | |
150 | return ret; | |
151 | *ui = t; | |
152 | return count; | |
153 | } | |
154 | ||
155 | static ssize_t f2fs_attr_show(struct kobject *kobj, | |
156 | struct attribute *attr, char *buf) | |
157 | { | |
158 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, | |
159 | s_kobj); | |
160 | struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); | |
161 | ||
162 | return a->show ? a->show(a, sbi, buf) : 0; | |
163 | } | |
164 | ||
165 | static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr, | |
166 | const char *buf, size_t len) | |
167 | { | |
168 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, | |
169 | s_kobj); | |
170 | struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); | |
171 | ||
172 | return a->store ? a->store(a, sbi, buf, len) : 0; | |
173 | } | |
174 | ||
175 | static void f2fs_sb_release(struct kobject *kobj) | |
176 | { | |
177 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, | |
178 | s_kobj); | |
179 | complete(&sbi->s_kobj_unregister); | |
180 | } | |
181 | ||
ea91e9b0 | 182 | #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \ |
b59d0bae NJ |
183 | static struct f2fs_attr f2fs_attr_##_name = { \ |
184 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
185 | .show = _show, \ | |
186 | .store = _store, \ | |
ea91e9b0 JK |
187 | .struct_type = _struct_type, \ |
188 | .offset = _offset \ | |
b59d0bae NJ |
189 | } |
190 | ||
ea91e9b0 JK |
191 | #define F2FS_RW_ATTR(struct_type, struct_name, name, elname) \ |
192 | F2FS_ATTR_OFFSET(struct_type, name, 0644, \ | |
193 | f2fs_sbi_show, f2fs_sbi_store, \ | |
194 | offsetof(struct struct_name, elname)) | |
b59d0bae | 195 | |
ea91e9b0 JK |
196 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time); |
197 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time); | |
198 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time); | |
199 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_idle, gc_idle); | |
200 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments); | |
7ac8c3b0 | 201 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, max_small_discards, max_discards); |
bba681cb | 202 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, batched_trim_sections, trim_sections); |
216fbd64 JK |
203 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy); |
204 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util); | |
c1ce1b02 | 205 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks); |
cdfc41c1 | 206 | F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh); |
b1c57c1c | 207 | F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search); |
ab9fa662 | 208 | F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level); |
b59d0bae NJ |
209 | |
210 | #define ATTR_LIST(name) (&f2fs_attr_##name.attr) | |
211 | static struct attribute *f2fs_attrs[] = { | |
212 | ATTR_LIST(gc_min_sleep_time), | |
213 | ATTR_LIST(gc_max_sleep_time), | |
214 | ATTR_LIST(gc_no_gc_sleep_time), | |
d2dc095f | 215 | ATTR_LIST(gc_idle), |
ea91e9b0 | 216 | ATTR_LIST(reclaim_segments), |
7ac8c3b0 | 217 | ATTR_LIST(max_small_discards), |
bba681cb | 218 | ATTR_LIST(batched_trim_sections), |
216fbd64 JK |
219 | ATTR_LIST(ipu_policy), |
220 | ATTR_LIST(min_ipu_util), | |
c1ce1b02 | 221 | ATTR_LIST(min_fsync_blocks), |
b1c57c1c | 222 | ATTR_LIST(max_victim_search), |
ab9fa662 | 223 | ATTR_LIST(dir_level), |
cdfc41c1 | 224 | ATTR_LIST(ram_thresh), |
b59d0bae NJ |
225 | NULL, |
226 | }; | |
227 | ||
228 | static const struct sysfs_ops f2fs_attr_ops = { | |
229 | .show = f2fs_attr_show, | |
230 | .store = f2fs_attr_store, | |
231 | }; | |
232 | ||
233 | static struct kobj_type f2fs_ktype = { | |
234 | .default_attrs = f2fs_attrs, | |
235 | .sysfs_ops = &f2fs_attr_ops, | |
236 | .release = f2fs_sb_release, | |
237 | }; | |
238 | ||
a07ef784 NJ |
239 | void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...) |
240 | { | |
241 | struct va_format vaf; | |
242 | va_list args; | |
243 | ||
244 | va_start(args, fmt); | |
245 | vaf.fmt = fmt; | |
246 | vaf.va = &args; | |
247 | printk("%sF2FS-fs (%s): %pV\n", level, sb->s_id, &vaf); | |
248 | va_end(args); | |
249 | } | |
250 | ||
aff063e2 JK |
251 | static void init_once(void *foo) |
252 | { | |
253 | struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo; | |
254 | ||
aff063e2 JK |
255 | inode_init_once(&fi->vfs_inode); |
256 | } | |
257 | ||
696c018c NJ |
258 | static int parse_options(struct super_block *sb, char *options) |
259 | { | |
260 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
261 | substring_t args[MAX_OPT_ARGS]; | |
262 | char *p, *name; | |
263 | int arg = 0; | |
264 | ||
265 | if (!options) | |
266 | return 0; | |
267 | ||
268 | while ((p = strsep(&options, ",")) != NULL) { | |
269 | int token; | |
270 | if (!*p) | |
271 | continue; | |
272 | /* | |
273 | * Initialize args struct so we know whether arg was | |
274 | * found; some options take optional arguments. | |
275 | */ | |
276 | args[0].to = args[0].from = NULL; | |
277 | token = match_token(p, f2fs_tokens, args); | |
278 | ||
279 | switch (token) { | |
280 | case Opt_gc_background: | |
281 | name = match_strdup(&args[0]); | |
282 | ||
283 | if (!name) | |
284 | return -ENOMEM; | |
04c09388 | 285 | if (strlen(name) == 2 && !strncmp(name, "on", 2)) |
696c018c | 286 | set_opt(sbi, BG_GC); |
04c09388 | 287 | else if (strlen(name) == 3 && !strncmp(name, "off", 3)) |
696c018c NJ |
288 | clear_opt(sbi, BG_GC); |
289 | else { | |
290 | kfree(name); | |
291 | return -EINVAL; | |
292 | } | |
293 | kfree(name); | |
294 | break; | |
295 | case Opt_disable_roll_forward: | |
296 | set_opt(sbi, DISABLE_ROLL_FORWARD); | |
297 | break; | |
2d834bf9 JK |
298 | case Opt_norecovery: |
299 | /* this option mounts f2fs with ro */ | |
300 | set_opt(sbi, DISABLE_ROLL_FORWARD); | |
301 | if (!f2fs_readonly(sb)) | |
302 | return -EINVAL; | |
303 | break; | |
696c018c NJ |
304 | case Opt_discard: |
305 | set_opt(sbi, DISCARD); | |
306 | break; | |
307 | case Opt_noheap: | |
308 | set_opt(sbi, NOHEAP); | |
309 | break; | |
310 | #ifdef CONFIG_F2FS_FS_XATTR | |
4058c511 KA |
311 | case Opt_user_xattr: |
312 | set_opt(sbi, XATTR_USER); | |
313 | break; | |
696c018c NJ |
314 | case Opt_nouser_xattr: |
315 | clear_opt(sbi, XATTR_USER); | |
316 | break; | |
444c580f JK |
317 | case Opt_inline_xattr: |
318 | set_opt(sbi, INLINE_XATTR); | |
319 | break; | |
696c018c | 320 | #else |
4058c511 KA |
321 | case Opt_user_xattr: |
322 | f2fs_msg(sb, KERN_INFO, | |
323 | "user_xattr options not supported"); | |
324 | break; | |
696c018c NJ |
325 | case Opt_nouser_xattr: |
326 | f2fs_msg(sb, KERN_INFO, | |
327 | "nouser_xattr options not supported"); | |
328 | break; | |
444c580f JK |
329 | case Opt_inline_xattr: |
330 | f2fs_msg(sb, KERN_INFO, | |
331 | "inline_xattr options not supported"); | |
332 | break; | |
696c018c NJ |
333 | #endif |
334 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
4058c511 KA |
335 | case Opt_acl: |
336 | set_opt(sbi, POSIX_ACL); | |
337 | break; | |
696c018c NJ |
338 | case Opt_noacl: |
339 | clear_opt(sbi, POSIX_ACL); | |
340 | break; | |
341 | #else | |
4058c511 KA |
342 | case Opt_acl: |
343 | f2fs_msg(sb, KERN_INFO, "acl options not supported"); | |
344 | break; | |
696c018c NJ |
345 | case Opt_noacl: |
346 | f2fs_msg(sb, KERN_INFO, "noacl options not supported"); | |
347 | break; | |
348 | #endif | |
349 | case Opt_active_logs: | |
350 | if (args->from && match_int(args, &arg)) | |
351 | return -EINVAL; | |
352 | if (arg != 2 && arg != 4 && arg != NR_CURSEG_TYPE) | |
353 | return -EINVAL; | |
354 | sbi->active_logs = arg; | |
355 | break; | |
356 | case Opt_disable_ext_identify: | |
357 | set_opt(sbi, DISABLE_EXT_IDENTIFY); | |
358 | break; | |
8274de77 HL |
359 | case Opt_inline_data: |
360 | set_opt(sbi, INLINE_DATA); | |
361 | break; | |
5efd3c6f CY |
362 | case Opt_inline_dentry: |
363 | set_opt(sbi, INLINE_DENTRY); | |
364 | break; | |
6b4afdd7 JK |
365 | case Opt_flush_merge: |
366 | set_opt(sbi, FLUSH_MERGE); | |
367 | break; | |
0f7b2abd JK |
368 | case Opt_nobarrier: |
369 | set_opt(sbi, NOBARRIER); | |
370 | break; | |
d5053a34 JK |
371 | case Opt_fastboot: |
372 | set_opt(sbi, FASTBOOT); | |
373 | break; | |
89672159 CY |
374 | case Opt_extent_cache: |
375 | set_opt(sbi, EXTENT_CACHE); | |
376 | break; | |
75342797 WL |
377 | case Opt_noinline_data: |
378 | clear_opt(sbi, INLINE_DATA); | |
379 | break; | |
696c018c NJ |
380 | default: |
381 | f2fs_msg(sb, KERN_ERR, | |
382 | "Unrecognized mount option \"%s\" or missing value", | |
383 | p); | |
384 | return -EINVAL; | |
385 | } | |
386 | } | |
387 | return 0; | |
388 | } | |
389 | ||
aff063e2 JK |
390 | static struct inode *f2fs_alloc_inode(struct super_block *sb) |
391 | { | |
392 | struct f2fs_inode_info *fi; | |
393 | ||
a0acdfe0 | 394 | fi = kmem_cache_alloc(f2fs_inode_cachep, GFP_F2FS_ZERO); |
aff063e2 JK |
395 | if (!fi) |
396 | return NULL; | |
397 | ||
398 | init_once((void *) fi); | |
399 | ||
434720fa | 400 | /* Initialize f2fs-specific inode info */ |
aff063e2 | 401 | fi->vfs_inode.i_version = 1; |
a7ffdbe2 | 402 | atomic_set(&fi->dirty_pages, 0); |
aff063e2 JK |
403 | fi->i_current_depth = 1; |
404 | fi->i_advise = 0; | |
0c872e2d | 405 | rwlock_init(&fi->ext_lock); |
d928bfbf | 406 | init_rwsem(&fi->i_sem); |
34ba94ba | 407 | INIT_RADIX_TREE(&fi->inmem_root, GFP_NOFS); |
88b88a66 JK |
408 | INIT_LIST_HEAD(&fi->inmem_pages); |
409 | mutex_init(&fi->inmem_lock); | |
aff063e2 JK |
410 | |
411 | set_inode_flag(fi, FI_NEW_INODE); | |
412 | ||
444c580f JK |
413 | if (test_opt(F2FS_SB(sb), INLINE_XATTR)) |
414 | set_inode_flag(fi, FI_INLINE_XATTR); | |
415 | ||
ab9fa662 JK |
416 | /* Will be used by directory only */ |
417 | fi->i_dir_level = F2FS_SB(sb)->dir_level; | |
418 | ||
57e5055b JK |
419 | #ifdef CONFIG_F2FS_FS_ENCRYPTION |
420 | fi->i_crypt_info = NULL; | |
421 | #endif | |
aff063e2 JK |
422 | return &fi->vfs_inode; |
423 | } | |
424 | ||
531ad7d5 JK |
425 | static int f2fs_drop_inode(struct inode *inode) |
426 | { | |
427 | /* | |
428 | * This is to avoid a deadlock condition like below. | |
429 | * writeback_single_inode(inode) | |
430 | * - f2fs_write_data_page | |
431 | * - f2fs_gc -> iput -> evict | |
432 | * - inode_wait_for_writeback(inode) | |
433 | */ | |
06e1bc05 JK |
434 | if (!inode_unhashed(inode) && inode->i_state & I_SYNC) { |
435 | if (!inode->i_nlink && !is_bad_inode(inode)) { | |
436 | spin_unlock(&inode->i_lock); | |
437 | ||
438 | /* some remained atomic pages should discarded */ | |
439 | if (f2fs_is_atomic_file(inode)) | |
440 | commit_inmem_pages(inode, true); | |
441 | ||
442 | sb_start_intwrite(inode->i_sb); | |
443 | i_size_write(inode, 0); | |
444 | ||
445 | if (F2FS_HAS_BLOCKS(inode)) | |
446 | f2fs_truncate(inode); | |
447 | ||
448 | sb_end_intwrite(inode->i_sb); | |
449 | ||
450 | #ifdef CONFIG_F2FS_FS_ENCRYPTION | |
451 | if (F2FS_I(inode)->i_crypt_info) | |
26bf3dc7 JK |
452 | f2fs_free_encryption_info(inode, |
453 | F2FS_I(inode)->i_crypt_info); | |
06e1bc05 JK |
454 | #endif |
455 | spin_lock(&inode->i_lock); | |
456 | } | |
531ad7d5 | 457 | return 0; |
06e1bc05 | 458 | } |
531ad7d5 JK |
459 | return generic_drop_inode(inode); |
460 | } | |
461 | ||
b3783873 JK |
462 | /* |
463 | * f2fs_dirty_inode() is called from __mark_inode_dirty() | |
464 | * | |
465 | * We should call set_dirty_inode to write the dirty inode through write_inode. | |
466 | */ | |
467 | static void f2fs_dirty_inode(struct inode *inode, int flags) | |
468 | { | |
469 | set_inode_flag(F2FS_I(inode), FI_DIRTY_INODE); | |
b3783873 JK |
470 | } |
471 | ||
aff063e2 JK |
472 | static void f2fs_i_callback(struct rcu_head *head) |
473 | { | |
474 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
475 | kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode)); | |
476 | } | |
477 | ||
25ca923b | 478 | static void f2fs_destroy_inode(struct inode *inode) |
aff063e2 JK |
479 | { |
480 | call_rcu(&inode->i_rcu, f2fs_i_callback); | |
481 | } | |
482 | ||
483 | static void f2fs_put_super(struct super_block *sb) | |
484 | { | |
485 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
486 | ||
5e176d54 JK |
487 | if (sbi->s_proc) { |
488 | remove_proc_entry("segment_info", sbi->s_proc); | |
489 | remove_proc_entry(sb->s_id, f2fs_proc_root); | |
490 | } | |
b59d0bae | 491 | kobject_del(&sbi->s_kobj); |
5e176d54 | 492 | |
aff063e2 JK |
493 | f2fs_destroy_stats(sbi); |
494 | stop_gc_thread(sbi); | |
495 | ||
85dc2f2c JK |
496 | /* |
497 | * We don't need to do checkpoint when superblock is clean. | |
498 | * But, the previous checkpoint was not done by umount, it needs to do | |
499 | * clean checkpoint again. | |
500 | */ | |
caf0047e | 501 | if (is_sbi_flag_set(sbi, SBI_IS_DIRTY) || |
85dc2f2c | 502 | !is_set_ckpt_flags(F2FS_CKPT(sbi), CP_UMOUNT_FLAG)) { |
75ab4cb8 JK |
503 | struct cp_control cpc = { |
504 | .reason = CP_UMOUNT, | |
505 | }; | |
506 | write_checkpoint(sbi, &cpc); | |
507 | } | |
aff063e2 | 508 | |
cf779cab JK |
509 | /* |
510 | * normally superblock is clean, so we need to release this. | |
511 | * In addition, EIO will skip do checkpoint, we need this as well. | |
512 | */ | |
6f12ac25 | 513 | release_dirty_inode(sbi); |
4b2fecc8 | 514 | release_discard_addrs(sbi); |
6f12ac25 | 515 | |
aff063e2 JK |
516 | iput(sbi->node_inode); |
517 | iput(sbi->meta_inode); | |
518 | ||
519 | /* destroy f2fs internal modules */ | |
520 | destroy_node_manager(sbi); | |
521 | destroy_segment_manager(sbi); | |
522 | ||
523 | kfree(sbi->ckpt); | |
b59d0bae NJ |
524 | kobject_put(&sbi->s_kobj); |
525 | wait_for_completion(&sbi->s_kobj_unregister); | |
aff063e2 JK |
526 | |
527 | sb->s_fs_info = NULL; | |
528 | brelse(sbi->raw_super_buf); | |
529 | kfree(sbi); | |
530 | } | |
531 | ||
532 | int f2fs_sync_fs(struct super_block *sb, int sync) | |
533 | { | |
534 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
aff063e2 | 535 | |
a2a4a7e4 NJ |
536 | trace_f2fs_sync_fs(sb, sync); |
537 | ||
b7473754 | 538 | if (sync) { |
d5053a34 JK |
539 | struct cp_control cpc; |
540 | ||
119ee914 JK |
541 | cpc.reason = __get_cp_reason(sbi); |
542 | ||
b7473754 | 543 | mutex_lock(&sbi->gc_mutex); |
75ab4cb8 | 544 | write_checkpoint(sbi, &cpc); |
b7473754 JK |
545 | mutex_unlock(&sbi->gc_mutex); |
546 | } else { | |
7d82db83 | 547 | f2fs_balance_fs(sbi); |
b7473754 | 548 | } |
05ca3632 | 549 | f2fs_trace_ios(NULL, 1); |
aff063e2 | 550 | |
64c576fe | 551 | return 0; |
aff063e2 JK |
552 | } |
553 | ||
d6212a5f CL |
554 | static int f2fs_freeze(struct super_block *sb) |
555 | { | |
556 | int err; | |
557 | ||
77888c1e | 558 | if (f2fs_readonly(sb)) |
d6212a5f CL |
559 | return 0; |
560 | ||
561 | err = f2fs_sync_fs(sb, 1); | |
562 | return err; | |
563 | } | |
564 | ||
565 | static int f2fs_unfreeze(struct super_block *sb) | |
566 | { | |
567 | return 0; | |
568 | } | |
569 | ||
aff063e2 JK |
570 | static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf) |
571 | { | |
572 | struct super_block *sb = dentry->d_sb; | |
573 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
574 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); | |
575 | block_t total_count, user_block_count, start_count, ovp_count; | |
576 | ||
577 | total_count = le64_to_cpu(sbi->raw_super->block_count); | |
578 | user_block_count = sbi->user_block_count; | |
579 | start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr); | |
580 | ovp_count = SM_I(sbi)->ovp_segments << sbi->log_blocks_per_seg; | |
581 | buf->f_type = F2FS_SUPER_MAGIC; | |
582 | buf->f_bsize = sbi->blocksize; | |
583 | ||
584 | buf->f_blocks = total_count - start_count; | |
585 | buf->f_bfree = buf->f_blocks - valid_user_blocks(sbi) - ovp_count; | |
586 | buf->f_bavail = user_block_count - valid_user_blocks(sbi); | |
587 | ||
c200b1aa CY |
588 | buf->f_files = sbi->total_node_count - F2FS_RESERVED_NODE_NUM; |
589 | buf->f_ffree = buf->f_files - valid_inode_count(sbi); | |
aff063e2 | 590 | |
5a20d339 | 591 | buf->f_namelen = F2FS_NAME_LEN; |
aff063e2 JK |
592 | buf->f_fsid.val[0] = (u32)id; |
593 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
594 | ||
595 | return 0; | |
596 | } | |
597 | ||
598 | static int f2fs_show_options(struct seq_file *seq, struct dentry *root) | |
599 | { | |
600 | struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb); | |
601 | ||
b270ad6f | 602 | if (!f2fs_readonly(sbi->sb) && test_opt(sbi, BG_GC)) |
696c018c | 603 | seq_printf(seq, ",background_gc=%s", "on"); |
aff063e2 | 604 | else |
696c018c | 605 | seq_printf(seq, ",background_gc=%s", "off"); |
aff063e2 JK |
606 | if (test_opt(sbi, DISABLE_ROLL_FORWARD)) |
607 | seq_puts(seq, ",disable_roll_forward"); | |
608 | if (test_opt(sbi, DISCARD)) | |
609 | seq_puts(seq, ",discard"); | |
610 | if (test_opt(sbi, NOHEAP)) | |
611 | seq_puts(seq, ",no_heap_alloc"); | |
612 | #ifdef CONFIG_F2FS_FS_XATTR | |
613 | if (test_opt(sbi, XATTR_USER)) | |
614 | seq_puts(seq, ",user_xattr"); | |
615 | else | |
616 | seq_puts(seq, ",nouser_xattr"); | |
444c580f JK |
617 | if (test_opt(sbi, INLINE_XATTR)) |
618 | seq_puts(seq, ",inline_xattr"); | |
aff063e2 JK |
619 | #endif |
620 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
621 | if (test_opt(sbi, POSIX_ACL)) | |
622 | seq_puts(seq, ",acl"); | |
623 | else | |
624 | seq_puts(seq, ",noacl"); | |
625 | #endif | |
626 | if (test_opt(sbi, DISABLE_EXT_IDENTIFY)) | |
aa43507f | 627 | seq_puts(seq, ",disable_ext_identify"); |
8274de77 HL |
628 | if (test_opt(sbi, INLINE_DATA)) |
629 | seq_puts(seq, ",inline_data"); | |
75342797 WL |
630 | else |
631 | seq_puts(seq, ",noinline_data"); | |
5efd3c6f CY |
632 | if (test_opt(sbi, INLINE_DENTRY)) |
633 | seq_puts(seq, ",inline_dentry"); | |
b270ad6f | 634 | if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE)) |
6b4afdd7 | 635 | seq_puts(seq, ",flush_merge"); |
0f7b2abd JK |
636 | if (test_opt(sbi, NOBARRIER)) |
637 | seq_puts(seq, ",nobarrier"); | |
d5053a34 JK |
638 | if (test_opt(sbi, FASTBOOT)) |
639 | seq_puts(seq, ",fastboot"); | |
89672159 CY |
640 | if (test_opt(sbi, EXTENT_CACHE)) |
641 | seq_puts(seq, ",extent_cache"); | |
aff063e2 JK |
642 | seq_printf(seq, ",active_logs=%u", sbi->active_logs); |
643 | ||
644 | return 0; | |
645 | } | |
646 | ||
5e176d54 JK |
647 | static int segment_info_seq_show(struct seq_file *seq, void *offset) |
648 | { | |
649 | struct super_block *sb = seq->private; | |
650 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
6c311ec6 CF |
651 | unsigned int total_segs = |
652 | le32_to_cpu(sbi->raw_super->segment_count_main); | |
5e176d54 JK |
653 | int i; |
654 | ||
90aa6dc9 CY |
655 | seq_puts(seq, "format: segment_type|valid_blocks\n" |
656 | "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n"); | |
657 | ||
5e176d54 | 658 | for (i = 0; i < total_segs; i++) { |
90aa6dc9 CY |
659 | struct seg_entry *se = get_seg_entry(sbi, i); |
660 | ||
661 | if ((i % 10) == 0) | |
662 | seq_printf(seq, "%-5d", i); | |
663 | seq_printf(seq, "%d|%-3u", se->type, | |
664 | get_valid_blocks(sbi, i, 1)); | |
46c04366 GZ |
665 | if ((i % 10) == 9 || i == (total_segs - 1)) |
666 | seq_putc(seq, '\n'); | |
5e176d54 | 667 | else |
46c04366 | 668 | seq_putc(seq, ' '); |
5e176d54 | 669 | } |
46c04366 | 670 | |
5e176d54 JK |
671 | return 0; |
672 | } | |
673 | ||
674 | static int segment_info_open_fs(struct inode *inode, struct file *file) | |
675 | { | |
676 | return single_open(file, segment_info_seq_show, PDE_DATA(inode)); | |
677 | } | |
678 | ||
679 | static const struct file_operations f2fs_seq_segment_info_fops = { | |
680 | .owner = THIS_MODULE, | |
681 | .open = segment_info_open_fs, | |
682 | .read = seq_read, | |
683 | .llseek = seq_lseek, | |
684 | .release = single_release, | |
685 | }; | |
686 | ||
498c5e9f YH |
687 | static void default_options(struct f2fs_sb_info *sbi) |
688 | { | |
689 | /* init some FS parameters */ | |
690 | sbi->active_logs = NR_CURSEG_TYPE; | |
691 | ||
692 | set_opt(sbi, BG_GC); | |
693 | set_opt(sbi, INLINE_DATA); | |
694 | ||
695 | #ifdef CONFIG_F2FS_FS_XATTR | |
696 | set_opt(sbi, XATTR_USER); | |
697 | #endif | |
698 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
699 | set_opt(sbi, POSIX_ACL); | |
700 | #endif | |
701 | } | |
702 | ||
696c018c NJ |
703 | static int f2fs_remount(struct super_block *sb, int *flags, char *data) |
704 | { | |
705 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
706 | struct f2fs_mount_info org_mount_opt; | |
707 | int err, active_logs; | |
876dc59e GZ |
708 | bool need_restart_gc = false; |
709 | bool need_stop_gc = false; | |
696c018c | 710 | |
02b9984d TT |
711 | sync_filesystem(sb); |
712 | ||
696c018c NJ |
713 | /* |
714 | * Save the old mount options in case we | |
715 | * need to restore them. | |
716 | */ | |
717 | org_mount_opt = sbi->mount_opt; | |
718 | active_logs = sbi->active_logs; | |
719 | ||
26666c8a | 720 | sbi->mount_opt.opt = 0; |
498c5e9f | 721 | default_options(sbi); |
26666c8a | 722 | |
696c018c NJ |
723 | /* parse mount options */ |
724 | err = parse_options(sb, data); | |
725 | if (err) | |
726 | goto restore_opts; | |
727 | ||
728 | /* | |
729 | * Previous and new state of filesystem is RO, | |
876dc59e | 730 | * so skip checking GC and FLUSH_MERGE conditions. |
696c018c | 731 | */ |
6b2920a5 | 732 | if (f2fs_readonly(sb) && (*flags & MS_RDONLY)) |
696c018c NJ |
733 | goto skip; |
734 | ||
735 | /* | |
736 | * We stop the GC thread if FS is mounted as RO | |
737 | * or if background_gc = off is passed in mount | |
738 | * option. Also sync the filesystem. | |
739 | */ | |
740 | if ((*flags & MS_RDONLY) || !test_opt(sbi, BG_GC)) { | |
741 | if (sbi->gc_thread) { | |
742 | stop_gc_thread(sbi); | |
743 | f2fs_sync_fs(sb, 1); | |
876dc59e | 744 | need_restart_gc = true; |
696c018c | 745 | } |
aba291b3 | 746 | } else if (!sbi->gc_thread) { |
696c018c NJ |
747 | err = start_gc_thread(sbi); |
748 | if (err) | |
749 | goto restore_opts; | |
876dc59e GZ |
750 | need_stop_gc = true; |
751 | } | |
752 | ||
753 | /* | |
754 | * We stop issue flush thread if FS is mounted as RO | |
755 | * or if flush_merge is not passed in mount option. | |
756 | */ | |
757 | if ((*flags & MS_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) { | |
2163d198 | 758 | destroy_flush_cmd_control(sbi); |
aba291b3 | 759 | } else if (!SM_I(sbi)->cmd_control_info) { |
2163d198 GZ |
760 | err = create_flush_cmd_control(sbi); |
761 | if (err) | |
a688b9d9 | 762 | goto restore_gc; |
696c018c NJ |
763 | } |
764 | skip: | |
765 | /* Update the POSIXACL Flag */ | |
766 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
767 | (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0); | |
768 | return 0; | |
876dc59e GZ |
769 | restore_gc: |
770 | if (need_restart_gc) { | |
771 | if (start_gc_thread(sbi)) | |
772 | f2fs_msg(sbi->sb, KERN_WARNING, | |
e1c42045 | 773 | "background gc thread has stopped"); |
876dc59e GZ |
774 | } else if (need_stop_gc) { |
775 | stop_gc_thread(sbi); | |
776 | } | |
696c018c NJ |
777 | restore_opts: |
778 | sbi->mount_opt = org_mount_opt; | |
779 | sbi->active_logs = active_logs; | |
780 | return err; | |
781 | } | |
782 | ||
aff063e2 JK |
783 | static struct super_operations f2fs_sops = { |
784 | .alloc_inode = f2fs_alloc_inode, | |
531ad7d5 | 785 | .drop_inode = f2fs_drop_inode, |
aff063e2 JK |
786 | .destroy_inode = f2fs_destroy_inode, |
787 | .write_inode = f2fs_write_inode, | |
b3783873 | 788 | .dirty_inode = f2fs_dirty_inode, |
aff063e2 JK |
789 | .show_options = f2fs_show_options, |
790 | .evict_inode = f2fs_evict_inode, | |
791 | .put_super = f2fs_put_super, | |
792 | .sync_fs = f2fs_sync_fs, | |
d6212a5f CL |
793 | .freeze_fs = f2fs_freeze, |
794 | .unfreeze_fs = f2fs_unfreeze, | |
aff063e2 | 795 | .statfs = f2fs_statfs, |
696c018c | 796 | .remount_fs = f2fs_remount, |
aff063e2 JK |
797 | }; |
798 | ||
799 | static struct inode *f2fs_nfs_get_inode(struct super_block *sb, | |
800 | u64 ino, u32 generation) | |
801 | { | |
802 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
803 | struct inode *inode; | |
804 | ||
d6b7d4b3 | 805 | if (check_nid_range(sbi, ino)) |
910bb12d | 806 | return ERR_PTR(-ESTALE); |
aff063e2 JK |
807 | |
808 | /* | |
809 | * f2fs_iget isn't quite right if the inode is currently unallocated! | |
810 | * However f2fs_iget currently does appropriate checks to handle stale | |
811 | * inodes so everything is OK. | |
812 | */ | |
813 | inode = f2fs_iget(sb, ino); | |
814 | if (IS_ERR(inode)) | |
815 | return ERR_CAST(inode); | |
6bacf52f | 816 | if (unlikely(generation && inode->i_generation != generation)) { |
aff063e2 JK |
817 | /* we didn't find the right inode.. */ |
818 | iput(inode); | |
819 | return ERR_PTR(-ESTALE); | |
820 | } | |
821 | return inode; | |
822 | } | |
823 | ||
824 | static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
825 | int fh_len, int fh_type) | |
826 | { | |
827 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
828 | f2fs_nfs_get_inode); | |
829 | } | |
830 | ||
831 | static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid, | |
832 | int fh_len, int fh_type) | |
833 | { | |
834 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
835 | f2fs_nfs_get_inode); | |
836 | } | |
837 | ||
838 | static const struct export_operations f2fs_export_ops = { | |
839 | .fh_to_dentry = f2fs_fh_to_dentry, | |
840 | .fh_to_parent = f2fs_fh_to_parent, | |
841 | .get_parent = f2fs_get_parent, | |
842 | }; | |
843 | ||
aff063e2 JK |
844 | static loff_t max_file_size(unsigned bits) |
845 | { | |
de93653f | 846 | loff_t result = (DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS); |
aff063e2 JK |
847 | loff_t leaf_count = ADDRS_PER_BLOCK; |
848 | ||
849 | /* two direct node blocks */ | |
850 | result += (leaf_count * 2); | |
851 | ||
852 | /* two indirect node blocks */ | |
853 | leaf_count *= NIDS_PER_BLOCK; | |
854 | result += (leaf_count * 2); | |
855 | ||
856 | /* one double indirect node block */ | |
857 | leaf_count *= NIDS_PER_BLOCK; | |
858 | result += leaf_count; | |
859 | ||
860 | result <<= bits; | |
861 | return result; | |
862 | } | |
863 | ||
a07ef784 NJ |
864 | static int sanity_check_raw_super(struct super_block *sb, |
865 | struct f2fs_super_block *raw_super) | |
aff063e2 JK |
866 | { |
867 | unsigned int blocksize; | |
868 | ||
a07ef784 NJ |
869 | if (F2FS_SUPER_MAGIC != le32_to_cpu(raw_super->magic)) { |
870 | f2fs_msg(sb, KERN_INFO, | |
871 | "Magic Mismatch, valid(0x%x) - read(0x%x)", | |
872 | F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic)); | |
aff063e2 | 873 | return 1; |
a07ef784 | 874 | } |
aff063e2 | 875 | |
5c9b4692 | 876 | /* Currently, support only 4KB page cache size */ |
877 | if (F2FS_BLKSIZE != PAGE_CACHE_SIZE) { | |
878 | f2fs_msg(sb, KERN_INFO, | |
14d7e9de | 879 | "Invalid page_cache_size (%lu), supports only 4KB\n", |
5c9b4692 | 880 | PAGE_CACHE_SIZE); |
881 | return 1; | |
882 | } | |
883 | ||
aff063e2 JK |
884 | /* Currently, support only 4KB block size */ |
885 | blocksize = 1 << le32_to_cpu(raw_super->log_blocksize); | |
5c9b4692 | 886 | if (blocksize != F2FS_BLKSIZE) { |
a07ef784 NJ |
887 | f2fs_msg(sb, KERN_INFO, |
888 | "Invalid blocksize (%u), supports only 4KB\n", | |
889 | blocksize); | |
aff063e2 | 890 | return 1; |
a07ef784 | 891 | } |
5c9b4692 | 892 | |
55cf9cb6 CY |
893 | /* Currently, support 512/1024/2048/4096 bytes sector size */ |
894 | if (le32_to_cpu(raw_super->log_sectorsize) > | |
895 | F2FS_MAX_LOG_SECTOR_SIZE || | |
896 | le32_to_cpu(raw_super->log_sectorsize) < | |
897 | F2FS_MIN_LOG_SECTOR_SIZE) { | |
898 | f2fs_msg(sb, KERN_INFO, "Invalid log sectorsize (%u)", | |
899 | le32_to_cpu(raw_super->log_sectorsize)); | |
aff063e2 | 900 | return 1; |
a07ef784 | 901 | } |
55cf9cb6 CY |
902 | if (le32_to_cpu(raw_super->log_sectors_per_block) + |
903 | le32_to_cpu(raw_super->log_sectorsize) != | |
904 | F2FS_MAX_LOG_SECTOR_SIZE) { | |
905 | f2fs_msg(sb, KERN_INFO, | |
906 | "Invalid log sectors per block(%u) log sectorsize(%u)", | |
907 | le32_to_cpu(raw_super->log_sectors_per_block), | |
908 | le32_to_cpu(raw_super->log_sectorsize)); | |
aff063e2 | 909 | return 1; |
a07ef784 | 910 | } |
aff063e2 JK |
911 | return 0; |
912 | } | |
913 | ||
577e3495 | 914 | static int sanity_check_ckpt(struct f2fs_sb_info *sbi) |
aff063e2 JK |
915 | { |
916 | unsigned int total, fsmeta; | |
577e3495 JK |
917 | struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); |
918 | struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); | |
aff063e2 JK |
919 | |
920 | total = le32_to_cpu(raw_super->segment_count); | |
921 | fsmeta = le32_to_cpu(raw_super->segment_count_ckpt); | |
922 | fsmeta += le32_to_cpu(raw_super->segment_count_sit); | |
923 | fsmeta += le32_to_cpu(raw_super->segment_count_nat); | |
924 | fsmeta += le32_to_cpu(ckpt->rsvd_segment_count); | |
925 | fsmeta += le32_to_cpu(raw_super->segment_count_ssa); | |
926 | ||
6bacf52f | 927 | if (unlikely(fsmeta >= total)) |
aff063e2 | 928 | return 1; |
577e3495 | 929 | |
1e968fdf | 930 | if (unlikely(f2fs_cp_error(sbi))) { |
577e3495 JK |
931 | f2fs_msg(sbi->sb, KERN_ERR, "A bug case: need to run fsck"); |
932 | return 1; | |
933 | } | |
aff063e2 JK |
934 | return 0; |
935 | } | |
936 | ||
937 | static void init_sb_info(struct f2fs_sb_info *sbi) | |
938 | { | |
939 | struct f2fs_super_block *raw_super = sbi->raw_super; | |
940 | int i; | |
941 | ||
942 | sbi->log_sectors_per_block = | |
943 | le32_to_cpu(raw_super->log_sectors_per_block); | |
944 | sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize); | |
945 | sbi->blocksize = 1 << sbi->log_blocksize; | |
946 | sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg); | |
947 | sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg; | |
948 | sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec); | |
949 | sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone); | |
950 | sbi->total_sections = le32_to_cpu(raw_super->section_count); | |
951 | sbi->total_node_count = | |
952 | (le32_to_cpu(raw_super->segment_count_nat) / 2) | |
953 | * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK; | |
954 | sbi->root_ino_num = le32_to_cpu(raw_super->root_ino); | |
955 | sbi->node_ino_num = le32_to_cpu(raw_super->node_ino); | |
956 | sbi->meta_ino_num = le32_to_cpu(raw_super->meta_ino); | |
5ec4e49f | 957 | sbi->cur_victim_sec = NULL_SECNO; |
b1c57c1c | 958 | sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH; |
aff063e2 JK |
959 | |
960 | for (i = 0; i < NR_COUNT_TYPE; i++) | |
961 | atomic_set(&sbi->nr_pages[i], 0); | |
ab9fa662 JK |
962 | |
963 | sbi->dir_level = DEF_DIR_LEVEL; | |
caf0047e | 964 | clear_sbi_flag(sbi, SBI_NEED_FSCK); |
aff063e2 JK |
965 | } |
966 | ||
9076a75f GZ |
967 | /* |
968 | * Read f2fs raw super block. | |
969 | * Because we have two copies of super block, so read the first one at first, | |
970 | * if the first one is invalid, move to read the second one. | |
971 | */ | |
972 | static int read_raw_super_block(struct super_block *sb, | |
973 | struct f2fs_super_block **raw_super, | |
da554e48 | 974 | struct buffer_head **raw_super_buf, |
975 | int *recovery) | |
14d7e9de | 976 | { |
9076a75f | 977 | int block = 0; |
da554e48 | 978 | struct buffer_head *buffer; |
979 | struct f2fs_super_block *super; | |
980 | int err = 0; | |
14d7e9de | 981 | |
9076a75f | 982 | retry: |
da554e48 | 983 | buffer = sb_bread(sb, block); |
984 | if (!buffer) { | |
985 | *recovery = 1; | |
9076a75f GZ |
986 | f2fs_msg(sb, KERN_ERR, "Unable to read %dth superblock", |
987 | block + 1); | |
988 | if (block == 0) { | |
989 | block++; | |
990 | goto retry; | |
991 | } else { | |
da554e48 | 992 | err = -EIO; |
993 | goto out; | |
9076a75f | 994 | } |
14d7e9de | 995 | } |
996 | ||
da554e48 | 997 | super = (struct f2fs_super_block *) |
998 | ((char *)(buffer)->b_data + F2FS_SUPER_OFFSET); | |
14d7e9de | 999 | |
1000 | /* sanity checking of raw super */ | |
da554e48 | 1001 | if (sanity_check_raw_super(sb, super)) { |
1002 | brelse(buffer); | |
1003 | *recovery = 1; | |
6c311ec6 CF |
1004 | f2fs_msg(sb, KERN_ERR, |
1005 | "Can't find valid F2FS filesystem in %dth superblock", | |
1006 | block + 1); | |
6bacf52f | 1007 | if (block == 0) { |
9076a75f GZ |
1008 | block++; |
1009 | goto retry; | |
1010 | } else { | |
da554e48 | 1011 | err = -EINVAL; |
1012 | goto out; | |
9076a75f GZ |
1013 | } |
1014 | } | |
14d7e9de | 1015 | |
da554e48 | 1016 | if (!*raw_super) { |
1017 | *raw_super_buf = buffer; | |
1018 | *raw_super = super; | |
1019 | } else { | |
1020 | /* already have a valid superblock */ | |
1021 | brelse(buffer); | |
1022 | } | |
1023 | ||
1024 | /* check the validity of the second superblock */ | |
1025 | if (block == 0) { | |
1026 | block++; | |
1027 | goto retry; | |
1028 | } | |
1029 | ||
1030 | out: | |
1031 | /* No valid superblock */ | |
1032 | if (!*raw_super) | |
1033 | return err; | |
1034 | ||
9076a75f | 1035 | return 0; |
14d7e9de | 1036 | } |
1037 | ||
26d815ad JK |
1038 | int f2fs_commit_super(struct f2fs_sb_info *sbi) |
1039 | { | |
1040 | struct buffer_head *sbh = sbi->raw_super_buf; | |
1041 | sector_t block = sbh->b_blocknr; | |
1042 | int err; | |
1043 | ||
1044 | /* write back-up superblock first */ | |
1045 | sbh->b_blocknr = block ? 0 : 1; | |
1046 | mark_buffer_dirty(sbh); | |
1047 | err = sync_dirty_buffer(sbh); | |
1048 | ||
1049 | sbh->b_blocknr = block; | |
1050 | if (err) | |
1051 | goto out; | |
1052 | ||
1053 | /* write current valid superblock */ | |
1054 | mark_buffer_dirty(sbh); | |
1055 | err = sync_dirty_buffer(sbh); | |
1056 | out: | |
1057 | clear_buffer_write_io_error(sbh); | |
1058 | set_buffer_uptodate(sbh); | |
1059 | return err; | |
1060 | } | |
1061 | ||
aff063e2 JK |
1062 | static int f2fs_fill_super(struct super_block *sb, void *data, int silent) |
1063 | { | |
1064 | struct f2fs_sb_info *sbi; | |
da554e48 | 1065 | struct f2fs_super_block *raw_super; |
aff063e2 JK |
1066 | struct buffer_head *raw_super_buf; |
1067 | struct inode *root; | |
da554e48 | 1068 | long err; |
2adc3505 | 1069 | bool retry = true, need_fsck = false; |
dabc4a5c | 1070 | char *options = NULL; |
da554e48 | 1071 | int recovery, i; |
aff063e2 | 1072 | |
ed2e621a | 1073 | try_onemore: |
da554e48 | 1074 | err = -EINVAL; |
1075 | raw_super = NULL; | |
1076 | raw_super_buf = NULL; | |
1077 | recovery = 0; | |
1078 | ||
aff063e2 JK |
1079 | /* allocate memory for f2fs-specific super block info */ |
1080 | sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL); | |
1081 | if (!sbi) | |
1082 | return -ENOMEM; | |
1083 | ||
ff9234ad | 1084 | /* set a block size */ |
6bacf52f | 1085 | if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) { |
a07ef784 | 1086 | f2fs_msg(sb, KERN_ERR, "unable to set blocksize"); |
aff063e2 | 1087 | goto free_sbi; |
a07ef784 | 1088 | } |
aff063e2 | 1089 | |
da554e48 | 1090 | err = read_raw_super_block(sb, &raw_super, &raw_super_buf, &recovery); |
9076a75f GZ |
1091 | if (err) |
1092 | goto free_sbi; | |
1093 | ||
5fb08372 | 1094 | sb->s_fs_info = sbi; |
498c5e9f | 1095 | default_options(sbi); |
aff063e2 | 1096 | /* parse mount options */ |
dabc4a5c JK |
1097 | options = kstrdup((const char *)data, GFP_KERNEL); |
1098 | if (data && !options) { | |
1099 | err = -ENOMEM; | |
aff063e2 | 1100 | goto free_sb_buf; |
dabc4a5c JK |
1101 | } |
1102 | ||
1103 | err = parse_options(sb, options); | |
1104 | if (err) | |
1105 | goto free_options; | |
aff063e2 | 1106 | |
25ca923b | 1107 | sb->s_maxbytes = max_file_size(le32_to_cpu(raw_super->log_blocksize)); |
aff063e2 JK |
1108 | sb->s_max_links = F2FS_LINK_MAX; |
1109 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
1110 | ||
1111 | sb->s_op = &f2fs_sops; | |
1112 | sb->s_xattr = f2fs_xattr_handlers; | |
1113 | sb->s_export_op = &f2fs_export_ops; | |
1114 | sb->s_magic = F2FS_SUPER_MAGIC; | |
aff063e2 JK |
1115 | sb->s_time_gran = 1; |
1116 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
1117 | (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0); | |
1118 | memcpy(sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid)); | |
1119 | ||
1120 | /* init f2fs-specific super block info */ | |
1121 | sbi->sb = sb; | |
1122 | sbi->raw_super = raw_super; | |
1123 | sbi->raw_super_buf = raw_super_buf; | |
1124 | mutex_init(&sbi->gc_mutex); | |
5463e7c1 | 1125 | mutex_init(&sbi->writepages); |
aff063e2 | 1126 | mutex_init(&sbi->cp_mutex); |
b3582c68 | 1127 | init_rwsem(&sbi->node_write); |
caf0047e | 1128 | clear_sbi_flag(sbi, SBI_POR_DOING); |
aff063e2 | 1129 | spin_lock_init(&sbi->stat_lock); |
971767ca | 1130 | |
df0f8dc0 | 1131 | init_rwsem(&sbi->read_io.io_rwsem); |
458e6197 JK |
1132 | sbi->read_io.sbi = sbi; |
1133 | sbi->read_io.bio = NULL; | |
1134 | for (i = 0; i < NR_PAGE_TYPE; i++) { | |
df0f8dc0 | 1135 | init_rwsem(&sbi->write_io[i].io_rwsem); |
458e6197 JK |
1136 | sbi->write_io[i].sbi = sbi; |
1137 | sbi->write_io[i].bio = NULL; | |
1138 | } | |
971767ca | 1139 | |
e479556b | 1140 | init_rwsem(&sbi->cp_rwsem); |
fb51b5ef | 1141 | init_waitqueue_head(&sbi->cp_wait); |
aff063e2 JK |
1142 | init_sb_info(sbi); |
1143 | ||
1144 | /* get an inode for meta space */ | |
1145 | sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi)); | |
1146 | if (IS_ERR(sbi->meta_inode)) { | |
a07ef784 | 1147 | f2fs_msg(sb, KERN_ERR, "Failed to read F2FS meta data inode"); |
aff063e2 | 1148 | err = PTR_ERR(sbi->meta_inode); |
dabc4a5c | 1149 | goto free_options; |
aff063e2 JK |
1150 | } |
1151 | ||
1152 | err = get_valid_checkpoint(sbi); | |
a07ef784 NJ |
1153 | if (err) { |
1154 | f2fs_msg(sb, KERN_ERR, "Failed to get valid F2FS checkpoint"); | |
aff063e2 | 1155 | goto free_meta_inode; |
a07ef784 | 1156 | } |
aff063e2 JK |
1157 | |
1158 | /* sanity checking of checkpoint */ | |
1159 | err = -EINVAL; | |
577e3495 | 1160 | if (sanity_check_ckpt(sbi)) { |
a07ef784 | 1161 | f2fs_msg(sb, KERN_ERR, "Invalid F2FS checkpoint"); |
aff063e2 | 1162 | goto free_cp; |
a07ef784 | 1163 | } |
aff063e2 JK |
1164 | |
1165 | sbi->total_valid_node_count = | |
1166 | le32_to_cpu(sbi->ckpt->valid_node_count); | |
1167 | sbi->total_valid_inode_count = | |
1168 | le32_to_cpu(sbi->ckpt->valid_inode_count); | |
1169 | sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count); | |
1170 | sbi->total_valid_block_count = | |
1171 | le64_to_cpu(sbi->ckpt->valid_block_count); | |
1172 | sbi->last_valid_block_count = sbi->total_valid_block_count; | |
1173 | sbi->alloc_valid_block_count = 0; | |
1174 | INIT_LIST_HEAD(&sbi->dir_inode_list); | |
1175 | spin_lock_init(&sbi->dir_inode_lock); | |
1176 | ||
1dcc336b CY |
1177 | init_extent_cache_info(sbi); |
1178 | ||
6451e041 | 1179 | init_ino_entry_info(sbi); |
aff063e2 JK |
1180 | |
1181 | /* setup f2fs internal modules */ | |
1182 | err = build_segment_manager(sbi); | |
a07ef784 NJ |
1183 | if (err) { |
1184 | f2fs_msg(sb, KERN_ERR, | |
1185 | "Failed to initialize F2FS segment manager"); | |
aff063e2 | 1186 | goto free_sm; |
a07ef784 | 1187 | } |
aff063e2 | 1188 | err = build_node_manager(sbi); |
a07ef784 NJ |
1189 | if (err) { |
1190 | f2fs_msg(sb, KERN_ERR, | |
1191 | "Failed to initialize F2FS node manager"); | |
aff063e2 | 1192 | goto free_nm; |
a07ef784 | 1193 | } |
aff063e2 JK |
1194 | |
1195 | build_gc_manager(sbi); | |
1196 | ||
1197 | /* get an inode for node space */ | |
1198 | sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi)); | |
1199 | if (IS_ERR(sbi->node_inode)) { | |
a07ef784 | 1200 | f2fs_msg(sb, KERN_ERR, "Failed to read node inode"); |
aff063e2 JK |
1201 | err = PTR_ERR(sbi->node_inode); |
1202 | goto free_nm; | |
1203 | } | |
1204 | ||
1205 | /* if there are nt orphan nodes free them */ | |
8f99a946 | 1206 | recover_orphan_inodes(sbi); |
aff063e2 JK |
1207 | |
1208 | /* read root inode and dentry */ | |
1209 | root = f2fs_iget(sb, F2FS_ROOT_INO(sbi)); | |
1210 | if (IS_ERR(root)) { | |
a07ef784 | 1211 | f2fs_msg(sb, KERN_ERR, "Failed to read root inode"); |
aff063e2 JK |
1212 | err = PTR_ERR(root); |
1213 | goto free_node_inode; | |
1214 | } | |
8f99a946 | 1215 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { |
9d847950 | 1216 | iput(root); |
8f99a946 | 1217 | err = -EINVAL; |
9d847950 | 1218 | goto free_node_inode; |
8f99a946 | 1219 | } |
aff063e2 JK |
1220 | |
1221 | sb->s_root = d_make_root(root); /* allocate root dentry */ | |
1222 | if (!sb->s_root) { | |
1223 | err = -ENOMEM; | |
1224 | goto free_root_inode; | |
1225 | } | |
1226 | ||
aff063e2 JK |
1227 | err = f2fs_build_stats(sbi); |
1228 | if (err) | |
6437d1b0 | 1229 | goto free_root_inode; |
aff063e2 | 1230 | |
5e176d54 JK |
1231 | if (f2fs_proc_root) |
1232 | sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root); | |
1233 | ||
1234 | if (sbi->s_proc) | |
1235 | proc_create_data("segment_info", S_IRUGO, sbi->s_proc, | |
1236 | &f2fs_seq_segment_info_fops, sb); | |
1237 | ||
d3ee456d NJ |
1238 | if (test_opt(sbi, DISCARD)) { |
1239 | struct request_queue *q = bdev_get_queue(sb->s_bdev); | |
96c6dd59 | 1240 | if (!blk_queue_discard(q)) { |
d3ee456d NJ |
1241 | f2fs_msg(sb, KERN_WARNING, |
1242 | "mounting with \"discard\" option, but " | |
1243 | "the device does not support discard"); | |
96c6dd59 CM |
1244 | clear_opt(sbi, DISCARD); |
1245 | } | |
d3ee456d NJ |
1246 | } |
1247 | ||
b59d0bae NJ |
1248 | sbi->s_kobj.kset = f2fs_kset; |
1249 | init_completion(&sbi->s_kobj_unregister); | |
1250 | err = kobject_init_and_add(&sbi->s_kobj, &f2fs_ktype, NULL, | |
1251 | "%s", sb->s_id); | |
1252 | if (err) | |
6437d1b0 | 1253 | goto free_proc; |
b59d0bae | 1254 | |
6437d1b0 JK |
1255 | /* recover fsynced data */ |
1256 | if (!test_opt(sbi, DISABLE_ROLL_FORWARD)) { | |
081d78c2 JK |
1257 | /* |
1258 | * mount should be failed, when device has readonly mode, and | |
1259 | * previous checkpoint was not done by clean system shutdown. | |
1260 | */ | |
1261 | if (bdev_read_only(sb->s_bdev) && | |
1262 | !is_set_ckpt_flags(sbi->ckpt, CP_UMOUNT_FLAG)) { | |
1263 | err = -EROFS; | |
1264 | goto free_kobj; | |
1265 | } | |
2adc3505 CY |
1266 | |
1267 | if (need_fsck) | |
1268 | set_sbi_flag(sbi, SBI_NEED_FSCK); | |
1269 | ||
6437d1b0 | 1270 | err = recover_fsync_data(sbi); |
ed2e621a | 1271 | if (err) { |
2adc3505 | 1272 | need_fsck = true; |
6437d1b0 JK |
1273 | f2fs_msg(sb, KERN_ERR, |
1274 | "Cannot recover all fsync data errno=%ld", err); | |
ed2e621a JK |
1275 | goto free_kobj; |
1276 | } | |
6437d1b0 | 1277 | } |
b59d0bae | 1278 | |
6437d1b0 JK |
1279 | /* |
1280 | * If filesystem is not mounted as read-only then | |
1281 | * do start the gc_thread. | |
1282 | */ | |
6c029932 | 1283 | if (test_opt(sbi, BG_GC) && !f2fs_readonly(sb)) { |
6437d1b0 JK |
1284 | /* After POR, we can run background GC thread.*/ |
1285 | err = start_gc_thread(sbi); | |
1286 | if (err) | |
1287 | goto free_kobj; | |
1288 | } | |
dabc4a5c | 1289 | kfree(options); |
da554e48 | 1290 | |
1291 | /* recover broken superblock */ | |
1292 | if (recovery && !f2fs_readonly(sb) && !bdev_read_only(sb->s_bdev)) { | |
1293 | f2fs_msg(sb, KERN_INFO, "Recover invalid superblock"); | |
1294 | f2fs_commit_super(sbi); | |
1295 | } | |
1296 | ||
aff063e2 | 1297 | return 0; |
6437d1b0 JK |
1298 | |
1299 | free_kobj: | |
1300 | kobject_del(&sbi->s_kobj); | |
1301 | free_proc: | |
1d15bd20 CY |
1302 | if (sbi->s_proc) { |
1303 | remove_proc_entry("segment_info", sbi->s_proc); | |
1304 | remove_proc_entry(sb->s_id, f2fs_proc_root); | |
1305 | } | |
1306 | f2fs_destroy_stats(sbi); | |
aff063e2 JK |
1307 | free_root_inode: |
1308 | dput(sb->s_root); | |
1309 | sb->s_root = NULL; | |
1310 | free_node_inode: | |
1311 | iput(sbi->node_inode); | |
1312 | free_nm: | |
1313 | destroy_node_manager(sbi); | |
1314 | free_sm: | |
1315 | destroy_segment_manager(sbi); | |
1316 | free_cp: | |
1317 | kfree(sbi->ckpt); | |
1318 | free_meta_inode: | |
1319 | make_bad_inode(sbi->meta_inode); | |
1320 | iput(sbi->meta_inode); | |
dabc4a5c JK |
1321 | free_options: |
1322 | kfree(options); | |
aff063e2 JK |
1323 | free_sb_buf: |
1324 | brelse(raw_super_buf); | |
1325 | free_sbi: | |
1326 | kfree(sbi); | |
ed2e621a JK |
1327 | |
1328 | /* give only one another chance */ | |
1329 | if (retry) { | |
9df47ba7 | 1330 | retry = false; |
ed2e621a JK |
1331 | shrink_dcache_sb(sb); |
1332 | goto try_onemore; | |
1333 | } | |
aff063e2 JK |
1334 | return err; |
1335 | } | |
1336 | ||
1337 | static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags, | |
1338 | const char *dev_name, void *data) | |
1339 | { | |
1340 | return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super); | |
1341 | } | |
1342 | ||
30a5537f JK |
1343 | static void kill_f2fs_super(struct super_block *sb) |
1344 | { | |
1345 | if (sb->s_root) | |
caf0047e | 1346 | set_sbi_flag(F2FS_SB(sb), SBI_IS_CLOSE); |
30a5537f JK |
1347 | kill_block_super(sb); |
1348 | } | |
1349 | ||
aff063e2 JK |
1350 | static struct file_system_type f2fs_fs_type = { |
1351 | .owner = THIS_MODULE, | |
1352 | .name = "f2fs", | |
1353 | .mount = f2fs_mount, | |
30a5537f | 1354 | .kill_sb = kill_f2fs_super, |
aff063e2 JK |
1355 | .fs_flags = FS_REQUIRES_DEV, |
1356 | }; | |
7f78e035 | 1357 | MODULE_ALIAS_FS("f2fs"); |
aff063e2 | 1358 | |
6e6093a8 | 1359 | static int __init init_inodecache(void) |
aff063e2 JK |
1360 | { |
1361 | f2fs_inode_cachep = f2fs_kmem_cache_create("f2fs_inode_cache", | |
e8512d2e | 1362 | sizeof(struct f2fs_inode_info)); |
6bacf52f | 1363 | if (!f2fs_inode_cachep) |
aff063e2 JK |
1364 | return -ENOMEM; |
1365 | return 0; | |
1366 | } | |
1367 | ||
1368 | static void destroy_inodecache(void) | |
1369 | { | |
1370 | /* | |
1371 | * Make sure all delayed rcu free inodes are flushed before we | |
1372 | * destroy cache. | |
1373 | */ | |
1374 | rcu_barrier(); | |
1375 | kmem_cache_destroy(f2fs_inode_cachep); | |
1376 | } | |
1377 | ||
1378 | static int __init init_f2fs_fs(void) | |
1379 | { | |
1380 | int err; | |
1381 | ||
c0508650 JK |
1382 | f2fs_build_trace_ios(); |
1383 | ||
aff063e2 JK |
1384 | err = init_inodecache(); |
1385 | if (err) | |
1386 | goto fail; | |
1387 | err = create_node_manager_caches(); | |
1388 | if (err) | |
9890ff3f | 1389 | goto free_inodecache; |
7fd9e544 | 1390 | err = create_segment_manager_caches(); |
aff063e2 | 1391 | if (err) |
9890ff3f | 1392 | goto free_node_manager_caches; |
aff063e2 JK |
1393 | err = create_checkpoint_caches(); |
1394 | if (err) | |
06292073 | 1395 | goto free_segment_manager_caches; |
1dcc336b CY |
1396 | err = create_extent_cache(); |
1397 | if (err) | |
1398 | goto free_checkpoint_caches; | |
b59d0bae | 1399 | f2fs_kset = kset_create_and_add("f2fs", NULL, fs_kobj); |
6e6b978c WY |
1400 | if (!f2fs_kset) { |
1401 | err = -ENOMEM; | |
1dcc336b | 1402 | goto free_extent_cache; |
6e6b978c | 1403 | } |
cfc4d971 | 1404 | err = f2fs_init_crypto(); |
4589d25d | 1405 | if (err) |
9890ff3f | 1406 | goto free_kset; |
cfc4d971 JK |
1407 | err = register_filesystem(&f2fs_fs_type); |
1408 | if (err) | |
1409 | goto free_crypto; | |
4589d25d | 1410 | f2fs_create_root_stats(); |
5e176d54 | 1411 | f2fs_proc_root = proc_mkdir("fs/f2fs", NULL); |
9890ff3f ZH |
1412 | return 0; |
1413 | ||
cfc4d971 JK |
1414 | free_crypto: |
1415 | f2fs_exit_crypto(); | |
9890ff3f ZH |
1416 | free_kset: |
1417 | kset_unregister(f2fs_kset); | |
1dcc336b CY |
1418 | free_extent_cache: |
1419 | destroy_extent_cache(); | |
9890ff3f ZH |
1420 | free_checkpoint_caches: |
1421 | destroy_checkpoint_caches(); | |
7fd9e544 JK |
1422 | free_segment_manager_caches: |
1423 | destroy_segment_manager_caches(); | |
9890ff3f ZH |
1424 | free_node_manager_caches: |
1425 | destroy_node_manager_caches(); | |
1426 | free_inodecache: | |
1427 | destroy_inodecache(); | |
aff063e2 JK |
1428 | fail: |
1429 | return err; | |
1430 | } | |
1431 | ||
1432 | static void __exit exit_f2fs_fs(void) | |
1433 | { | |
5e176d54 | 1434 | remove_proc_entry("fs/f2fs", NULL); |
4589d25d | 1435 | f2fs_destroy_root_stats(); |
aff063e2 | 1436 | unregister_filesystem(&f2fs_fs_type); |
cfc4d971 | 1437 | f2fs_exit_crypto(); |
fdf6c8be | 1438 | destroy_extent_cache(); |
aff063e2 | 1439 | destroy_checkpoint_caches(); |
5dcd8a71 | 1440 | destroy_segment_manager_caches(); |
aff063e2 JK |
1441 | destroy_node_manager_caches(); |
1442 | destroy_inodecache(); | |
b59d0bae | 1443 | kset_unregister(f2fs_kset); |
351f4fba | 1444 | f2fs_destroy_trace_ios(); |
aff063e2 JK |
1445 | } |
1446 | ||
1447 | module_init(init_f2fs_fs) | |
1448 | module_exit(exit_f2fs_fs) | |
1449 | ||
1450 | MODULE_AUTHOR("Samsung Electronics's Praesto Team"); | |
1451 | MODULE_DESCRIPTION("Flash Friendly File System"); | |
1452 | MODULE_LICENSE("GPL"); |