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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" |
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 | 41 | |
2658e50d JK |
42 | /* f2fs-wide shrinker description */ |
43 | static struct shrinker f2fs_shrinker_info = { | |
44 | .scan_objects = f2fs_shrink_scan, | |
45 | .count_objects = f2fs_shrink_count, | |
46 | .seeks = DEFAULT_SEEKS, | |
47 | }; | |
48 | ||
aff063e2 | 49 | enum { |
696c018c | 50 | Opt_gc_background, |
aff063e2 | 51 | Opt_disable_roll_forward, |
2d834bf9 | 52 | Opt_norecovery, |
aff063e2 JK |
53 | Opt_discard, |
54 | Opt_noheap, | |
4058c511 | 55 | Opt_user_xattr, |
aff063e2 | 56 | Opt_nouser_xattr, |
4058c511 | 57 | Opt_acl, |
aff063e2 JK |
58 | Opt_noacl, |
59 | Opt_active_logs, | |
60 | Opt_disable_ext_identify, | |
444c580f | 61 | Opt_inline_xattr, |
8274de77 | 62 | Opt_inline_data, |
5efd3c6f | 63 | Opt_inline_dentry, |
6b4afdd7 | 64 | Opt_flush_merge, |
0f7b2abd | 65 | Opt_nobarrier, |
d5053a34 | 66 | Opt_fastboot, |
89672159 | 67 | Opt_extent_cache, |
7daaea25 | 68 | Opt_noextent_cache, |
75342797 | 69 | Opt_noinline_data, |
aff063e2 JK |
70 | Opt_err, |
71 | }; | |
72 | ||
73 | static match_table_t f2fs_tokens = { | |
696c018c | 74 | {Opt_gc_background, "background_gc=%s"}, |
aff063e2 | 75 | {Opt_disable_roll_forward, "disable_roll_forward"}, |
2d834bf9 | 76 | {Opt_norecovery, "norecovery"}, |
aff063e2 JK |
77 | {Opt_discard, "discard"}, |
78 | {Opt_noheap, "no_heap"}, | |
4058c511 | 79 | {Opt_user_xattr, "user_xattr"}, |
aff063e2 | 80 | {Opt_nouser_xattr, "nouser_xattr"}, |
4058c511 | 81 | {Opt_acl, "acl"}, |
aff063e2 JK |
82 | {Opt_noacl, "noacl"}, |
83 | {Opt_active_logs, "active_logs=%u"}, | |
84 | {Opt_disable_ext_identify, "disable_ext_identify"}, | |
444c580f | 85 | {Opt_inline_xattr, "inline_xattr"}, |
8274de77 | 86 | {Opt_inline_data, "inline_data"}, |
5efd3c6f | 87 | {Opt_inline_dentry, "inline_dentry"}, |
6b4afdd7 | 88 | {Opt_flush_merge, "flush_merge"}, |
0f7b2abd | 89 | {Opt_nobarrier, "nobarrier"}, |
d5053a34 | 90 | {Opt_fastboot, "fastboot"}, |
89672159 | 91 | {Opt_extent_cache, "extent_cache"}, |
7daaea25 | 92 | {Opt_noextent_cache, "noextent_cache"}, |
75342797 | 93 | {Opt_noinline_data, "noinline_data"}, |
aff063e2 JK |
94 | {Opt_err, NULL}, |
95 | }; | |
96 | ||
b59d0bae | 97 | /* Sysfs support for f2fs */ |
ea91e9b0 JK |
98 | enum { |
99 | GC_THREAD, /* struct f2fs_gc_thread */ | |
100 | SM_INFO, /* struct f2fs_sm_info */ | |
cdfc41c1 | 101 | NM_INFO, /* struct f2fs_nm_info */ |
b1c57c1c | 102 | F2FS_SBI, /* struct f2fs_sb_info */ |
ea91e9b0 JK |
103 | }; |
104 | ||
b59d0bae NJ |
105 | struct f2fs_attr { |
106 | struct attribute attr; | |
107 | ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *); | |
108 | ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *, | |
109 | const char *, size_t); | |
ea91e9b0 | 110 | int struct_type; |
b59d0bae NJ |
111 | int offset; |
112 | }; | |
113 | ||
ea91e9b0 JK |
114 | static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type) |
115 | { | |
116 | if (struct_type == GC_THREAD) | |
117 | return (unsigned char *)sbi->gc_thread; | |
118 | else if (struct_type == SM_INFO) | |
119 | return (unsigned char *)SM_I(sbi); | |
cdfc41c1 JK |
120 | else if (struct_type == NM_INFO) |
121 | return (unsigned char *)NM_I(sbi); | |
b1c57c1c JK |
122 | else if (struct_type == F2FS_SBI) |
123 | return (unsigned char *)sbi; | |
ea91e9b0 JK |
124 | return NULL; |
125 | } | |
126 | ||
b59d0bae NJ |
127 | static ssize_t f2fs_sbi_show(struct f2fs_attr *a, |
128 | struct f2fs_sb_info *sbi, char *buf) | |
129 | { | |
ea91e9b0 | 130 | unsigned char *ptr = NULL; |
b59d0bae NJ |
131 | unsigned int *ui; |
132 | ||
ea91e9b0 JK |
133 | ptr = __struct_ptr(sbi, a->struct_type); |
134 | if (!ptr) | |
b59d0bae NJ |
135 | return -EINVAL; |
136 | ||
ea91e9b0 | 137 | ui = (unsigned int *)(ptr + a->offset); |
b59d0bae NJ |
138 | |
139 | return snprintf(buf, PAGE_SIZE, "%u\n", *ui); | |
140 | } | |
141 | ||
142 | static ssize_t f2fs_sbi_store(struct f2fs_attr *a, | |
143 | struct f2fs_sb_info *sbi, | |
144 | const char *buf, size_t count) | |
145 | { | |
ea91e9b0 | 146 | unsigned char *ptr; |
b59d0bae NJ |
147 | unsigned long t; |
148 | unsigned int *ui; | |
149 | ssize_t ret; | |
150 | ||
ea91e9b0 JK |
151 | ptr = __struct_ptr(sbi, a->struct_type); |
152 | if (!ptr) | |
b59d0bae NJ |
153 | return -EINVAL; |
154 | ||
ea91e9b0 | 155 | ui = (unsigned int *)(ptr + a->offset); |
b59d0bae NJ |
156 | |
157 | ret = kstrtoul(skip_spaces(buf), 0, &t); | |
158 | if (ret < 0) | |
159 | return ret; | |
160 | *ui = t; | |
161 | return count; | |
162 | } | |
163 | ||
164 | static ssize_t f2fs_attr_show(struct kobject *kobj, | |
165 | struct attribute *attr, char *buf) | |
166 | { | |
167 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, | |
168 | s_kobj); | |
169 | struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); | |
170 | ||
171 | return a->show ? a->show(a, sbi, buf) : 0; | |
172 | } | |
173 | ||
174 | static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr, | |
175 | const char *buf, size_t len) | |
176 | { | |
177 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, | |
178 | s_kobj); | |
179 | struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); | |
180 | ||
181 | return a->store ? a->store(a, sbi, buf, len) : 0; | |
182 | } | |
183 | ||
184 | static void f2fs_sb_release(struct kobject *kobj) | |
185 | { | |
186 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, | |
187 | s_kobj); | |
188 | complete(&sbi->s_kobj_unregister); | |
189 | } | |
190 | ||
ea91e9b0 | 191 | #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \ |
b59d0bae NJ |
192 | static struct f2fs_attr f2fs_attr_##_name = { \ |
193 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
194 | .show = _show, \ | |
195 | .store = _store, \ | |
ea91e9b0 JK |
196 | .struct_type = _struct_type, \ |
197 | .offset = _offset \ | |
b59d0bae NJ |
198 | } |
199 | ||
ea91e9b0 JK |
200 | #define F2FS_RW_ATTR(struct_type, struct_name, name, elname) \ |
201 | F2FS_ATTR_OFFSET(struct_type, name, 0644, \ | |
202 | f2fs_sbi_show, f2fs_sbi_store, \ | |
203 | offsetof(struct struct_name, elname)) | |
b59d0bae | 204 | |
ea91e9b0 JK |
205 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time); |
206 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time); | |
207 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time); | |
208 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_idle, gc_idle); | |
209 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments); | |
7ac8c3b0 | 210 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, max_small_discards, max_discards); |
bba681cb | 211 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, batched_trim_sections, trim_sections); |
216fbd64 JK |
212 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy); |
213 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util); | |
c1ce1b02 | 214 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks); |
cdfc41c1 | 215 | F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh); |
b1c57c1c | 216 | F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search); |
ab9fa662 | 217 | F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level); |
b59d0bae NJ |
218 | |
219 | #define ATTR_LIST(name) (&f2fs_attr_##name.attr) | |
220 | static struct attribute *f2fs_attrs[] = { | |
221 | ATTR_LIST(gc_min_sleep_time), | |
222 | ATTR_LIST(gc_max_sleep_time), | |
223 | ATTR_LIST(gc_no_gc_sleep_time), | |
d2dc095f | 224 | ATTR_LIST(gc_idle), |
ea91e9b0 | 225 | ATTR_LIST(reclaim_segments), |
7ac8c3b0 | 226 | ATTR_LIST(max_small_discards), |
bba681cb | 227 | ATTR_LIST(batched_trim_sections), |
216fbd64 JK |
228 | ATTR_LIST(ipu_policy), |
229 | ATTR_LIST(min_ipu_util), | |
c1ce1b02 | 230 | ATTR_LIST(min_fsync_blocks), |
b1c57c1c | 231 | ATTR_LIST(max_victim_search), |
ab9fa662 | 232 | ATTR_LIST(dir_level), |
cdfc41c1 | 233 | ATTR_LIST(ram_thresh), |
b59d0bae NJ |
234 | NULL, |
235 | }; | |
236 | ||
237 | static const struct sysfs_ops f2fs_attr_ops = { | |
238 | .show = f2fs_attr_show, | |
239 | .store = f2fs_attr_store, | |
240 | }; | |
241 | ||
242 | static struct kobj_type f2fs_ktype = { | |
243 | .default_attrs = f2fs_attrs, | |
244 | .sysfs_ops = &f2fs_attr_ops, | |
245 | .release = f2fs_sb_release, | |
246 | }; | |
247 | ||
a07ef784 NJ |
248 | void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...) |
249 | { | |
250 | struct va_format vaf; | |
251 | va_list args; | |
252 | ||
253 | va_start(args, fmt); | |
254 | vaf.fmt = fmt; | |
255 | vaf.va = &args; | |
256 | printk("%sF2FS-fs (%s): %pV\n", level, sb->s_id, &vaf); | |
257 | va_end(args); | |
258 | } | |
259 | ||
aff063e2 JK |
260 | static void init_once(void *foo) |
261 | { | |
262 | struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo; | |
263 | ||
aff063e2 JK |
264 | inode_init_once(&fi->vfs_inode); |
265 | } | |
266 | ||
696c018c NJ |
267 | static int parse_options(struct super_block *sb, char *options) |
268 | { | |
269 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
09d54cdd | 270 | struct request_queue *q; |
696c018c NJ |
271 | substring_t args[MAX_OPT_ARGS]; |
272 | char *p, *name; | |
273 | int arg = 0; | |
274 | ||
275 | if (!options) | |
276 | return 0; | |
277 | ||
278 | while ((p = strsep(&options, ",")) != NULL) { | |
279 | int token; | |
280 | if (!*p) | |
281 | continue; | |
282 | /* | |
283 | * Initialize args struct so we know whether arg was | |
284 | * found; some options take optional arguments. | |
285 | */ | |
286 | args[0].to = args[0].from = NULL; | |
287 | token = match_token(p, f2fs_tokens, args); | |
288 | ||
289 | switch (token) { | |
290 | case Opt_gc_background: | |
291 | name = match_strdup(&args[0]); | |
292 | ||
293 | if (!name) | |
294 | return -ENOMEM; | |
04c09388 | 295 | if (strlen(name) == 2 && !strncmp(name, "on", 2)) |
696c018c | 296 | set_opt(sbi, BG_GC); |
04c09388 | 297 | else if (strlen(name) == 3 && !strncmp(name, "off", 3)) |
696c018c NJ |
298 | clear_opt(sbi, BG_GC); |
299 | else { | |
300 | kfree(name); | |
301 | return -EINVAL; | |
302 | } | |
303 | kfree(name); | |
304 | break; | |
305 | case Opt_disable_roll_forward: | |
306 | set_opt(sbi, DISABLE_ROLL_FORWARD); | |
307 | break; | |
2d834bf9 JK |
308 | case Opt_norecovery: |
309 | /* this option mounts f2fs with ro */ | |
310 | set_opt(sbi, DISABLE_ROLL_FORWARD); | |
311 | if (!f2fs_readonly(sb)) | |
312 | return -EINVAL; | |
313 | break; | |
696c018c | 314 | case Opt_discard: |
09d54cdd CY |
315 | q = bdev_get_queue(sb->s_bdev); |
316 | if (blk_queue_discard(q)) { | |
317 | set_opt(sbi, DISCARD); | |
318 | } else { | |
319 | f2fs_msg(sb, KERN_WARNING, | |
320 | "mounting with \"discard\" option, but " | |
321 | "the device does not support discard"); | |
322 | } | |
696c018c NJ |
323 | break; |
324 | case Opt_noheap: | |
325 | set_opt(sbi, NOHEAP); | |
326 | break; | |
327 | #ifdef CONFIG_F2FS_FS_XATTR | |
4058c511 KA |
328 | case Opt_user_xattr: |
329 | set_opt(sbi, XATTR_USER); | |
330 | break; | |
696c018c NJ |
331 | case Opt_nouser_xattr: |
332 | clear_opt(sbi, XATTR_USER); | |
333 | break; | |
444c580f JK |
334 | case Opt_inline_xattr: |
335 | set_opt(sbi, INLINE_XATTR); | |
336 | break; | |
696c018c | 337 | #else |
4058c511 KA |
338 | case Opt_user_xattr: |
339 | f2fs_msg(sb, KERN_INFO, | |
340 | "user_xattr options not supported"); | |
341 | break; | |
696c018c NJ |
342 | case Opt_nouser_xattr: |
343 | f2fs_msg(sb, KERN_INFO, | |
344 | "nouser_xattr options not supported"); | |
345 | break; | |
444c580f JK |
346 | case Opt_inline_xattr: |
347 | f2fs_msg(sb, KERN_INFO, | |
348 | "inline_xattr options not supported"); | |
349 | break; | |
696c018c NJ |
350 | #endif |
351 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
4058c511 KA |
352 | case Opt_acl: |
353 | set_opt(sbi, POSIX_ACL); | |
354 | break; | |
696c018c NJ |
355 | case Opt_noacl: |
356 | clear_opt(sbi, POSIX_ACL); | |
357 | break; | |
358 | #else | |
4058c511 KA |
359 | case Opt_acl: |
360 | f2fs_msg(sb, KERN_INFO, "acl options not supported"); | |
361 | break; | |
696c018c NJ |
362 | case Opt_noacl: |
363 | f2fs_msg(sb, KERN_INFO, "noacl options not supported"); | |
364 | break; | |
365 | #endif | |
366 | case Opt_active_logs: | |
367 | if (args->from && match_int(args, &arg)) | |
368 | return -EINVAL; | |
369 | if (arg != 2 && arg != 4 && arg != NR_CURSEG_TYPE) | |
370 | return -EINVAL; | |
371 | sbi->active_logs = arg; | |
372 | break; | |
373 | case Opt_disable_ext_identify: | |
374 | set_opt(sbi, DISABLE_EXT_IDENTIFY); | |
375 | break; | |
8274de77 HL |
376 | case Opt_inline_data: |
377 | set_opt(sbi, INLINE_DATA); | |
378 | break; | |
5efd3c6f CY |
379 | case Opt_inline_dentry: |
380 | set_opt(sbi, INLINE_DENTRY); | |
381 | break; | |
6b4afdd7 JK |
382 | case Opt_flush_merge: |
383 | set_opt(sbi, FLUSH_MERGE); | |
384 | break; | |
0f7b2abd JK |
385 | case Opt_nobarrier: |
386 | set_opt(sbi, NOBARRIER); | |
387 | break; | |
d5053a34 JK |
388 | case Opt_fastboot: |
389 | set_opt(sbi, FASTBOOT); | |
390 | break; | |
89672159 CY |
391 | case Opt_extent_cache: |
392 | set_opt(sbi, EXTENT_CACHE); | |
393 | break; | |
7daaea25 JK |
394 | case Opt_noextent_cache: |
395 | clear_opt(sbi, EXTENT_CACHE); | |
396 | break; | |
75342797 WL |
397 | case Opt_noinline_data: |
398 | clear_opt(sbi, INLINE_DATA); | |
399 | break; | |
696c018c NJ |
400 | default: |
401 | f2fs_msg(sb, KERN_ERR, | |
402 | "Unrecognized mount option \"%s\" or missing value", | |
403 | p); | |
404 | return -EINVAL; | |
405 | } | |
406 | } | |
407 | return 0; | |
408 | } | |
409 | ||
aff063e2 JK |
410 | static struct inode *f2fs_alloc_inode(struct super_block *sb) |
411 | { | |
412 | struct f2fs_inode_info *fi; | |
413 | ||
a0acdfe0 | 414 | fi = kmem_cache_alloc(f2fs_inode_cachep, GFP_F2FS_ZERO); |
aff063e2 JK |
415 | if (!fi) |
416 | return NULL; | |
417 | ||
418 | init_once((void *) fi); | |
419 | ||
434720fa | 420 | /* Initialize f2fs-specific inode info */ |
aff063e2 | 421 | fi->vfs_inode.i_version = 1; |
a7ffdbe2 | 422 | atomic_set(&fi->dirty_pages, 0); |
aff063e2 JK |
423 | fi->i_current_depth = 1; |
424 | fi->i_advise = 0; | |
0c872e2d | 425 | rwlock_init(&fi->ext_lock); |
d928bfbf | 426 | init_rwsem(&fi->i_sem); |
34ba94ba | 427 | INIT_RADIX_TREE(&fi->inmem_root, GFP_NOFS); |
88b88a66 JK |
428 | INIT_LIST_HEAD(&fi->inmem_pages); |
429 | mutex_init(&fi->inmem_lock); | |
aff063e2 JK |
430 | |
431 | set_inode_flag(fi, FI_NEW_INODE); | |
432 | ||
444c580f JK |
433 | if (test_opt(F2FS_SB(sb), INLINE_XATTR)) |
434 | set_inode_flag(fi, FI_INLINE_XATTR); | |
435 | ||
ab9fa662 JK |
436 | /* Will be used by directory only */ |
437 | fi->i_dir_level = F2FS_SB(sb)->dir_level; | |
438 | ||
57e5055b JK |
439 | #ifdef CONFIG_F2FS_FS_ENCRYPTION |
440 | fi->i_crypt_info = NULL; | |
441 | #endif | |
aff063e2 JK |
442 | return &fi->vfs_inode; |
443 | } | |
444 | ||
531ad7d5 JK |
445 | static int f2fs_drop_inode(struct inode *inode) |
446 | { | |
447 | /* | |
448 | * This is to avoid a deadlock condition like below. | |
449 | * writeback_single_inode(inode) | |
450 | * - f2fs_write_data_page | |
451 | * - f2fs_gc -> iput -> evict | |
452 | * - inode_wait_for_writeback(inode) | |
453 | */ | |
06e1bc05 JK |
454 | if (!inode_unhashed(inode) && inode->i_state & I_SYNC) { |
455 | if (!inode->i_nlink && !is_bad_inode(inode)) { | |
456 | spin_unlock(&inode->i_lock); | |
457 | ||
458 | /* some remained atomic pages should discarded */ | |
459 | if (f2fs_is_atomic_file(inode)) | |
460 | commit_inmem_pages(inode, true); | |
461 | ||
462 | sb_start_intwrite(inode->i_sb); | |
463 | i_size_write(inode, 0); | |
464 | ||
465 | if (F2FS_HAS_BLOCKS(inode)) | |
466 | f2fs_truncate(inode); | |
467 | ||
468 | sb_end_intwrite(inode->i_sb); | |
469 | ||
470 | #ifdef CONFIG_F2FS_FS_ENCRYPTION | |
471 | if (F2FS_I(inode)->i_crypt_info) | |
26bf3dc7 JK |
472 | f2fs_free_encryption_info(inode, |
473 | F2FS_I(inode)->i_crypt_info); | |
06e1bc05 JK |
474 | #endif |
475 | spin_lock(&inode->i_lock); | |
476 | } | |
531ad7d5 | 477 | return 0; |
06e1bc05 | 478 | } |
531ad7d5 JK |
479 | return generic_drop_inode(inode); |
480 | } | |
481 | ||
b3783873 JK |
482 | /* |
483 | * f2fs_dirty_inode() is called from __mark_inode_dirty() | |
484 | * | |
485 | * We should call set_dirty_inode to write the dirty inode through write_inode. | |
486 | */ | |
487 | static void f2fs_dirty_inode(struct inode *inode, int flags) | |
488 | { | |
489 | set_inode_flag(F2FS_I(inode), FI_DIRTY_INODE); | |
b3783873 JK |
490 | } |
491 | ||
aff063e2 JK |
492 | static void f2fs_i_callback(struct rcu_head *head) |
493 | { | |
494 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
495 | kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode)); | |
496 | } | |
497 | ||
25ca923b | 498 | static void f2fs_destroy_inode(struct inode *inode) |
aff063e2 JK |
499 | { |
500 | call_rcu(&inode->i_rcu, f2fs_i_callback); | |
501 | } | |
502 | ||
503 | static void f2fs_put_super(struct super_block *sb) | |
504 | { | |
505 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
506 | ||
5e176d54 JK |
507 | if (sbi->s_proc) { |
508 | remove_proc_entry("segment_info", sbi->s_proc); | |
509 | remove_proc_entry(sb->s_id, f2fs_proc_root); | |
510 | } | |
b59d0bae | 511 | kobject_del(&sbi->s_kobj); |
5e176d54 | 512 | |
aff063e2 JK |
513 | stop_gc_thread(sbi); |
514 | ||
2658e50d JK |
515 | /* prevent remaining shrinker jobs */ |
516 | mutex_lock(&sbi->umount_mutex); | |
517 | ||
85dc2f2c JK |
518 | /* |
519 | * We don't need to do checkpoint when superblock is clean. | |
520 | * But, the previous checkpoint was not done by umount, it needs to do | |
521 | * clean checkpoint again. | |
522 | */ | |
caf0047e | 523 | if (is_sbi_flag_set(sbi, SBI_IS_DIRTY) || |
85dc2f2c | 524 | !is_set_ckpt_flags(F2FS_CKPT(sbi), CP_UMOUNT_FLAG)) { |
75ab4cb8 JK |
525 | struct cp_control cpc = { |
526 | .reason = CP_UMOUNT, | |
527 | }; | |
528 | write_checkpoint(sbi, &cpc); | |
529 | } | |
aff063e2 | 530 | |
eca616f8 JK |
531 | /* write_checkpoint can update stat informaion */ |
532 | f2fs_destroy_stats(sbi); | |
533 | ||
cf779cab JK |
534 | /* |
535 | * normally superblock is clean, so we need to release this. | |
536 | * In addition, EIO will skip do checkpoint, we need this as well. | |
537 | */ | |
6f12ac25 | 538 | release_dirty_inode(sbi); |
4b2fecc8 | 539 | release_discard_addrs(sbi); |
6f12ac25 | 540 | |
2658e50d JK |
541 | f2fs_leave_shrinker(sbi); |
542 | mutex_unlock(&sbi->umount_mutex); | |
543 | ||
aff063e2 JK |
544 | iput(sbi->node_inode); |
545 | iput(sbi->meta_inode); | |
546 | ||
547 | /* destroy f2fs internal modules */ | |
548 | destroy_node_manager(sbi); | |
549 | destroy_segment_manager(sbi); | |
550 | ||
551 | kfree(sbi->ckpt); | |
b59d0bae NJ |
552 | kobject_put(&sbi->s_kobj); |
553 | wait_for_completion(&sbi->s_kobj_unregister); | |
aff063e2 JK |
554 | |
555 | sb->s_fs_info = NULL; | |
556 | brelse(sbi->raw_super_buf); | |
557 | kfree(sbi); | |
558 | } | |
559 | ||
560 | int f2fs_sync_fs(struct super_block *sb, int sync) | |
561 | { | |
562 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
aff063e2 | 563 | |
a2a4a7e4 NJ |
564 | trace_f2fs_sync_fs(sb, sync); |
565 | ||
b7473754 | 566 | if (sync) { |
d5053a34 JK |
567 | struct cp_control cpc; |
568 | ||
119ee914 JK |
569 | cpc.reason = __get_cp_reason(sbi); |
570 | ||
b7473754 | 571 | mutex_lock(&sbi->gc_mutex); |
75ab4cb8 | 572 | write_checkpoint(sbi, &cpc); |
b7473754 JK |
573 | mutex_unlock(&sbi->gc_mutex); |
574 | } else { | |
7d82db83 | 575 | f2fs_balance_fs(sbi); |
b7473754 | 576 | } |
05ca3632 | 577 | f2fs_trace_ios(NULL, 1); |
aff063e2 | 578 | |
64c576fe | 579 | return 0; |
aff063e2 JK |
580 | } |
581 | ||
d6212a5f CL |
582 | static int f2fs_freeze(struct super_block *sb) |
583 | { | |
584 | int err; | |
585 | ||
77888c1e | 586 | if (f2fs_readonly(sb)) |
d6212a5f CL |
587 | return 0; |
588 | ||
589 | err = f2fs_sync_fs(sb, 1); | |
590 | return err; | |
591 | } | |
592 | ||
593 | static int f2fs_unfreeze(struct super_block *sb) | |
594 | { | |
595 | return 0; | |
596 | } | |
597 | ||
aff063e2 JK |
598 | static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf) |
599 | { | |
600 | struct super_block *sb = dentry->d_sb; | |
601 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
602 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); | |
603 | block_t total_count, user_block_count, start_count, ovp_count; | |
604 | ||
605 | total_count = le64_to_cpu(sbi->raw_super->block_count); | |
606 | user_block_count = sbi->user_block_count; | |
607 | start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr); | |
608 | ovp_count = SM_I(sbi)->ovp_segments << sbi->log_blocks_per_seg; | |
609 | buf->f_type = F2FS_SUPER_MAGIC; | |
610 | buf->f_bsize = sbi->blocksize; | |
611 | ||
612 | buf->f_blocks = total_count - start_count; | |
613 | buf->f_bfree = buf->f_blocks - valid_user_blocks(sbi) - ovp_count; | |
614 | buf->f_bavail = user_block_count - valid_user_blocks(sbi); | |
615 | ||
c200b1aa CY |
616 | buf->f_files = sbi->total_node_count - F2FS_RESERVED_NODE_NUM; |
617 | buf->f_ffree = buf->f_files - valid_inode_count(sbi); | |
aff063e2 | 618 | |
5a20d339 | 619 | buf->f_namelen = F2FS_NAME_LEN; |
aff063e2 JK |
620 | buf->f_fsid.val[0] = (u32)id; |
621 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
622 | ||
623 | return 0; | |
624 | } | |
625 | ||
626 | static int f2fs_show_options(struct seq_file *seq, struct dentry *root) | |
627 | { | |
628 | struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb); | |
629 | ||
b270ad6f | 630 | if (!f2fs_readonly(sbi->sb) && test_opt(sbi, BG_GC)) |
696c018c | 631 | seq_printf(seq, ",background_gc=%s", "on"); |
aff063e2 | 632 | else |
696c018c | 633 | seq_printf(seq, ",background_gc=%s", "off"); |
aff063e2 JK |
634 | if (test_opt(sbi, DISABLE_ROLL_FORWARD)) |
635 | seq_puts(seq, ",disable_roll_forward"); | |
636 | if (test_opt(sbi, DISCARD)) | |
637 | seq_puts(seq, ",discard"); | |
638 | if (test_opt(sbi, NOHEAP)) | |
639 | seq_puts(seq, ",no_heap_alloc"); | |
640 | #ifdef CONFIG_F2FS_FS_XATTR | |
641 | if (test_opt(sbi, XATTR_USER)) | |
642 | seq_puts(seq, ",user_xattr"); | |
643 | else | |
644 | seq_puts(seq, ",nouser_xattr"); | |
444c580f JK |
645 | if (test_opt(sbi, INLINE_XATTR)) |
646 | seq_puts(seq, ",inline_xattr"); | |
aff063e2 JK |
647 | #endif |
648 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
649 | if (test_opt(sbi, POSIX_ACL)) | |
650 | seq_puts(seq, ",acl"); | |
651 | else | |
652 | seq_puts(seq, ",noacl"); | |
653 | #endif | |
654 | if (test_opt(sbi, DISABLE_EXT_IDENTIFY)) | |
aa43507f | 655 | seq_puts(seq, ",disable_ext_identify"); |
8274de77 HL |
656 | if (test_opt(sbi, INLINE_DATA)) |
657 | seq_puts(seq, ",inline_data"); | |
75342797 WL |
658 | else |
659 | seq_puts(seq, ",noinline_data"); | |
5efd3c6f CY |
660 | if (test_opt(sbi, INLINE_DENTRY)) |
661 | seq_puts(seq, ",inline_dentry"); | |
b270ad6f | 662 | if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE)) |
6b4afdd7 | 663 | seq_puts(seq, ",flush_merge"); |
0f7b2abd JK |
664 | if (test_opt(sbi, NOBARRIER)) |
665 | seq_puts(seq, ",nobarrier"); | |
d5053a34 JK |
666 | if (test_opt(sbi, FASTBOOT)) |
667 | seq_puts(seq, ",fastboot"); | |
89672159 CY |
668 | if (test_opt(sbi, EXTENT_CACHE)) |
669 | seq_puts(seq, ",extent_cache"); | |
7daaea25 JK |
670 | else |
671 | seq_puts(seq, ",noextent_cache"); | |
aff063e2 JK |
672 | seq_printf(seq, ",active_logs=%u", sbi->active_logs); |
673 | ||
674 | return 0; | |
675 | } | |
676 | ||
5e176d54 JK |
677 | static int segment_info_seq_show(struct seq_file *seq, void *offset) |
678 | { | |
679 | struct super_block *sb = seq->private; | |
680 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
6c311ec6 CF |
681 | unsigned int total_segs = |
682 | le32_to_cpu(sbi->raw_super->segment_count_main); | |
5e176d54 JK |
683 | int i; |
684 | ||
90aa6dc9 CY |
685 | seq_puts(seq, "format: segment_type|valid_blocks\n" |
686 | "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n"); | |
687 | ||
5e176d54 | 688 | for (i = 0; i < total_segs; i++) { |
90aa6dc9 CY |
689 | struct seg_entry *se = get_seg_entry(sbi, i); |
690 | ||
691 | if ((i % 10) == 0) | |
692 | seq_printf(seq, "%-5d", i); | |
693 | seq_printf(seq, "%d|%-3u", se->type, | |
694 | get_valid_blocks(sbi, i, 1)); | |
46c04366 GZ |
695 | if ((i % 10) == 9 || i == (total_segs - 1)) |
696 | seq_putc(seq, '\n'); | |
5e176d54 | 697 | else |
46c04366 | 698 | seq_putc(seq, ' '); |
5e176d54 | 699 | } |
46c04366 | 700 | |
5e176d54 JK |
701 | return 0; |
702 | } | |
703 | ||
704 | static int segment_info_open_fs(struct inode *inode, struct file *file) | |
705 | { | |
706 | return single_open(file, segment_info_seq_show, PDE_DATA(inode)); | |
707 | } | |
708 | ||
709 | static const struct file_operations f2fs_seq_segment_info_fops = { | |
710 | .owner = THIS_MODULE, | |
711 | .open = segment_info_open_fs, | |
712 | .read = seq_read, | |
713 | .llseek = seq_lseek, | |
714 | .release = single_release, | |
715 | }; | |
716 | ||
498c5e9f YH |
717 | static void default_options(struct f2fs_sb_info *sbi) |
718 | { | |
719 | /* init some FS parameters */ | |
720 | sbi->active_logs = NR_CURSEG_TYPE; | |
721 | ||
722 | set_opt(sbi, BG_GC); | |
723 | set_opt(sbi, INLINE_DATA); | |
724 | ||
725 | #ifdef CONFIG_F2FS_FS_XATTR | |
726 | set_opt(sbi, XATTR_USER); | |
727 | #endif | |
728 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
729 | set_opt(sbi, POSIX_ACL); | |
730 | #endif | |
731 | } | |
732 | ||
696c018c NJ |
733 | static int f2fs_remount(struct super_block *sb, int *flags, char *data) |
734 | { | |
735 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
736 | struct f2fs_mount_info org_mount_opt; | |
737 | int err, active_logs; | |
876dc59e GZ |
738 | bool need_restart_gc = false; |
739 | bool need_stop_gc = false; | |
696c018c | 740 | |
02b9984d TT |
741 | sync_filesystem(sb); |
742 | ||
696c018c NJ |
743 | /* |
744 | * Save the old mount options in case we | |
745 | * need to restore them. | |
746 | */ | |
747 | org_mount_opt = sbi->mount_opt; | |
748 | active_logs = sbi->active_logs; | |
749 | ||
26666c8a | 750 | sbi->mount_opt.opt = 0; |
498c5e9f | 751 | default_options(sbi); |
26666c8a | 752 | |
696c018c NJ |
753 | /* parse mount options */ |
754 | err = parse_options(sb, data); | |
755 | if (err) | |
756 | goto restore_opts; | |
757 | ||
758 | /* | |
759 | * Previous and new state of filesystem is RO, | |
876dc59e | 760 | * so skip checking GC and FLUSH_MERGE conditions. |
696c018c | 761 | */ |
6b2920a5 | 762 | if (f2fs_readonly(sb) && (*flags & MS_RDONLY)) |
696c018c NJ |
763 | goto skip; |
764 | ||
765 | /* | |
766 | * We stop the GC thread if FS is mounted as RO | |
767 | * or if background_gc = off is passed in mount | |
768 | * option. Also sync the filesystem. | |
769 | */ | |
770 | if ((*flags & MS_RDONLY) || !test_opt(sbi, BG_GC)) { | |
771 | if (sbi->gc_thread) { | |
772 | stop_gc_thread(sbi); | |
773 | f2fs_sync_fs(sb, 1); | |
876dc59e | 774 | need_restart_gc = true; |
696c018c | 775 | } |
aba291b3 | 776 | } else if (!sbi->gc_thread) { |
696c018c NJ |
777 | err = start_gc_thread(sbi); |
778 | if (err) | |
779 | goto restore_opts; | |
876dc59e GZ |
780 | need_stop_gc = true; |
781 | } | |
782 | ||
783 | /* | |
784 | * We stop issue flush thread if FS is mounted as RO | |
785 | * or if flush_merge is not passed in mount option. | |
786 | */ | |
787 | if ((*flags & MS_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) { | |
2163d198 | 788 | destroy_flush_cmd_control(sbi); |
aba291b3 | 789 | } else if (!SM_I(sbi)->cmd_control_info) { |
2163d198 GZ |
790 | err = create_flush_cmd_control(sbi); |
791 | if (err) | |
a688b9d9 | 792 | goto restore_gc; |
696c018c NJ |
793 | } |
794 | skip: | |
795 | /* Update the POSIXACL Flag */ | |
796 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
797 | (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0); | |
798 | return 0; | |
876dc59e GZ |
799 | restore_gc: |
800 | if (need_restart_gc) { | |
801 | if (start_gc_thread(sbi)) | |
802 | f2fs_msg(sbi->sb, KERN_WARNING, | |
e1c42045 | 803 | "background gc thread has stopped"); |
876dc59e GZ |
804 | } else if (need_stop_gc) { |
805 | stop_gc_thread(sbi); | |
806 | } | |
696c018c NJ |
807 | restore_opts: |
808 | sbi->mount_opt = org_mount_opt; | |
809 | sbi->active_logs = active_logs; | |
810 | return err; | |
811 | } | |
812 | ||
aff063e2 JK |
813 | static struct super_operations f2fs_sops = { |
814 | .alloc_inode = f2fs_alloc_inode, | |
531ad7d5 | 815 | .drop_inode = f2fs_drop_inode, |
aff063e2 JK |
816 | .destroy_inode = f2fs_destroy_inode, |
817 | .write_inode = f2fs_write_inode, | |
b3783873 | 818 | .dirty_inode = f2fs_dirty_inode, |
aff063e2 JK |
819 | .show_options = f2fs_show_options, |
820 | .evict_inode = f2fs_evict_inode, | |
821 | .put_super = f2fs_put_super, | |
822 | .sync_fs = f2fs_sync_fs, | |
d6212a5f CL |
823 | .freeze_fs = f2fs_freeze, |
824 | .unfreeze_fs = f2fs_unfreeze, | |
aff063e2 | 825 | .statfs = f2fs_statfs, |
696c018c | 826 | .remount_fs = f2fs_remount, |
aff063e2 JK |
827 | }; |
828 | ||
829 | static struct inode *f2fs_nfs_get_inode(struct super_block *sb, | |
830 | u64 ino, u32 generation) | |
831 | { | |
832 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
833 | struct inode *inode; | |
834 | ||
d6b7d4b3 | 835 | if (check_nid_range(sbi, ino)) |
910bb12d | 836 | return ERR_PTR(-ESTALE); |
aff063e2 JK |
837 | |
838 | /* | |
839 | * f2fs_iget isn't quite right if the inode is currently unallocated! | |
840 | * However f2fs_iget currently does appropriate checks to handle stale | |
841 | * inodes so everything is OK. | |
842 | */ | |
843 | inode = f2fs_iget(sb, ino); | |
844 | if (IS_ERR(inode)) | |
845 | return ERR_CAST(inode); | |
6bacf52f | 846 | if (unlikely(generation && inode->i_generation != generation)) { |
aff063e2 JK |
847 | /* we didn't find the right inode.. */ |
848 | iput(inode); | |
849 | return ERR_PTR(-ESTALE); | |
850 | } | |
851 | return inode; | |
852 | } | |
853 | ||
854 | static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
855 | int fh_len, int fh_type) | |
856 | { | |
857 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
858 | f2fs_nfs_get_inode); | |
859 | } | |
860 | ||
861 | static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid, | |
862 | int fh_len, int fh_type) | |
863 | { | |
864 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
865 | f2fs_nfs_get_inode); | |
866 | } | |
867 | ||
868 | static const struct export_operations f2fs_export_ops = { | |
869 | .fh_to_dentry = f2fs_fh_to_dentry, | |
870 | .fh_to_parent = f2fs_fh_to_parent, | |
871 | .get_parent = f2fs_get_parent, | |
872 | }; | |
873 | ||
aff063e2 JK |
874 | static loff_t max_file_size(unsigned bits) |
875 | { | |
de93653f | 876 | loff_t result = (DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS); |
aff063e2 JK |
877 | loff_t leaf_count = ADDRS_PER_BLOCK; |
878 | ||
879 | /* two direct node blocks */ | |
880 | result += (leaf_count * 2); | |
881 | ||
882 | /* two indirect node blocks */ | |
883 | leaf_count *= NIDS_PER_BLOCK; | |
884 | result += (leaf_count * 2); | |
885 | ||
886 | /* one double indirect node block */ | |
887 | leaf_count *= NIDS_PER_BLOCK; | |
888 | result += leaf_count; | |
889 | ||
890 | result <<= bits; | |
891 | return result; | |
892 | } | |
893 | ||
a07ef784 NJ |
894 | static int sanity_check_raw_super(struct super_block *sb, |
895 | struct f2fs_super_block *raw_super) | |
aff063e2 JK |
896 | { |
897 | unsigned int blocksize; | |
898 | ||
a07ef784 NJ |
899 | if (F2FS_SUPER_MAGIC != le32_to_cpu(raw_super->magic)) { |
900 | f2fs_msg(sb, KERN_INFO, | |
901 | "Magic Mismatch, valid(0x%x) - read(0x%x)", | |
902 | F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic)); | |
aff063e2 | 903 | return 1; |
a07ef784 | 904 | } |
aff063e2 | 905 | |
5c9b4692 | 906 | /* Currently, support only 4KB page cache size */ |
907 | if (F2FS_BLKSIZE != PAGE_CACHE_SIZE) { | |
908 | f2fs_msg(sb, KERN_INFO, | |
14d7e9de | 909 | "Invalid page_cache_size (%lu), supports only 4KB\n", |
5c9b4692 | 910 | PAGE_CACHE_SIZE); |
911 | return 1; | |
912 | } | |
913 | ||
aff063e2 JK |
914 | /* Currently, support only 4KB block size */ |
915 | blocksize = 1 << le32_to_cpu(raw_super->log_blocksize); | |
5c9b4692 | 916 | if (blocksize != F2FS_BLKSIZE) { |
a07ef784 NJ |
917 | f2fs_msg(sb, KERN_INFO, |
918 | "Invalid blocksize (%u), supports only 4KB\n", | |
919 | blocksize); | |
aff063e2 | 920 | return 1; |
a07ef784 | 921 | } |
5c9b4692 | 922 | |
55cf9cb6 CY |
923 | /* Currently, support 512/1024/2048/4096 bytes sector size */ |
924 | if (le32_to_cpu(raw_super->log_sectorsize) > | |
925 | F2FS_MAX_LOG_SECTOR_SIZE || | |
926 | le32_to_cpu(raw_super->log_sectorsize) < | |
927 | F2FS_MIN_LOG_SECTOR_SIZE) { | |
928 | f2fs_msg(sb, KERN_INFO, "Invalid log sectorsize (%u)", | |
929 | le32_to_cpu(raw_super->log_sectorsize)); | |
aff063e2 | 930 | return 1; |
a07ef784 | 931 | } |
55cf9cb6 CY |
932 | if (le32_to_cpu(raw_super->log_sectors_per_block) + |
933 | le32_to_cpu(raw_super->log_sectorsize) != | |
934 | F2FS_MAX_LOG_SECTOR_SIZE) { | |
935 | f2fs_msg(sb, KERN_INFO, | |
936 | "Invalid log sectors per block(%u) log sectorsize(%u)", | |
937 | le32_to_cpu(raw_super->log_sectors_per_block), | |
938 | le32_to_cpu(raw_super->log_sectorsize)); | |
aff063e2 | 939 | return 1; |
a07ef784 | 940 | } |
aff063e2 JK |
941 | return 0; |
942 | } | |
943 | ||
577e3495 | 944 | static int sanity_check_ckpt(struct f2fs_sb_info *sbi) |
aff063e2 JK |
945 | { |
946 | unsigned int total, fsmeta; | |
577e3495 JK |
947 | struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); |
948 | struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); | |
aff063e2 JK |
949 | |
950 | total = le32_to_cpu(raw_super->segment_count); | |
951 | fsmeta = le32_to_cpu(raw_super->segment_count_ckpt); | |
952 | fsmeta += le32_to_cpu(raw_super->segment_count_sit); | |
953 | fsmeta += le32_to_cpu(raw_super->segment_count_nat); | |
954 | fsmeta += le32_to_cpu(ckpt->rsvd_segment_count); | |
955 | fsmeta += le32_to_cpu(raw_super->segment_count_ssa); | |
956 | ||
6bacf52f | 957 | if (unlikely(fsmeta >= total)) |
aff063e2 | 958 | return 1; |
577e3495 | 959 | |
1e968fdf | 960 | if (unlikely(f2fs_cp_error(sbi))) { |
577e3495 JK |
961 | f2fs_msg(sbi->sb, KERN_ERR, "A bug case: need to run fsck"); |
962 | return 1; | |
963 | } | |
aff063e2 JK |
964 | return 0; |
965 | } | |
966 | ||
967 | static void init_sb_info(struct f2fs_sb_info *sbi) | |
968 | { | |
969 | struct f2fs_super_block *raw_super = sbi->raw_super; | |
970 | int i; | |
971 | ||
972 | sbi->log_sectors_per_block = | |
973 | le32_to_cpu(raw_super->log_sectors_per_block); | |
974 | sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize); | |
975 | sbi->blocksize = 1 << sbi->log_blocksize; | |
976 | sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg); | |
977 | sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg; | |
978 | sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec); | |
979 | sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone); | |
980 | sbi->total_sections = le32_to_cpu(raw_super->section_count); | |
981 | sbi->total_node_count = | |
982 | (le32_to_cpu(raw_super->segment_count_nat) / 2) | |
983 | * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK; | |
984 | sbi->root_ino_num = le32_to_cpu(raw_super->root_ino); | |
985 | sbi->node_ino_num = le32_to_cpu(raw_super->node_ino); | |
986 | sbi->meta_ino_num = le32_to_cpu(raw_super->meta_ino); | |
5ec4e49f | 987 | sbi->cur_victim_sec = NULL_SECNO; |
b1c57c1c | 988 | sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH; |
aff063e2 JK |
989 | |
990 | for (i = 0; i < NR_COUNT_TYPE; i++) | |
991 | atomic_set(&sbi->nr_pages[i], 0); | |
ab9fa662 JK |
992 | |
993 | sbi->dir_level = DEF_DIR_LEVEL; | |
caf0047e | 994 | clear_sbi_flag(sbi, SBI_NEED_FSCK); |
2658e50d JK |
995 | |
996 | INIT_LIST_HEAD(&sbi->s_list); | |
997 | mutex_init(&sbi->umount_mutex); | |
aff063e2 JK |
998 | } |
999 | ||
9076a75f GZ |
1000 | /* |
1001 | * Read f2fs raw super block. | |
1002 | * Because we have two copies of super block, so read the first one at first, | |
1003 | * if the first one is invalid, move to read the second one. | |
1004 | */ | |
1005 | static int read_raw_super_block(struct super_block *sb, | |
1006 | struct f2fs_super_block **raw_super, | |
da554e48 | 1007 | struct buffer_head **raw_super_buf, |
1008 | int *recovery) | |
14d7e9de | 1009 | { |
9076a75f | 1010 | int block = 0; |
da554e48 | 1011 | struct buffer_head *buffer; |
1012 | struct f2fs_super_block *super; | |
1013 | int err = 0; | |
14d7e9de | 1014 | |
9076a75f | 1015 | retry: |
da554e48 | 1016 | buffer = sb_bread(sb, block); |
1017 | if (!buffer) { | |
1018 | *recovery = 1; | |
9076a75f GZ |
1019 | f2fs_msg(sb, KERN_ERR, "Unable to read %dth superblock", |
1020 | block + 1); | |
1021 | if (block == 0) { | |
1022 | block++; | |
1023 | goto retry; | |
1024 | } else { | |
da554e48 | 1025 | err = -EIO; |
1026 | goto out; | |
9076a75f | 1027 | } |
14d7e9de | 1028 | } |
1029 | ||
da554e48 | 1030 | super = (struct f2fs_super_block *) |
1031 | ((char *)(buffer)->b_data + F2FS_SUPER_OFFSET); | |
14d7e9de | 1032 | |
1033 | /* sanity checking of raw super */ | |
da554e48 | 1034 | if (sanity_check_raw_super(sb, super)) { |
1035 | brelse(buffer); | |
1036 | *recovery = 1; | |
6c311ec6 CF |
1037 | f2fs_msg(sb, KERN_ERR, |
1038 | "Can't find valid F2FS filesystem in %dth superblock", | |
1039 | block + 1); | |
6bacf52f | 1040 | if (block == 0) { |
9076a75f GZ |
1041 | block++; |
1042 | goto retry; | |
1043 | } else { | |
da554e48 | 1044 | err = -EINVAL; |
1045 | goto out; | |
9076a75f GZ |
1046 | } |
1047 | } | |
14d7e9de | 1048 | |
da554e48 | 1049 | if (!*raw_super) { |
1050 | *raw_super_buf = buffer; | |
1051 | *raw_super = super; | |
1052 | } else { | |
1053 | /* already have a valid superblock */ | |
1054 | brelse(buffer); | |
1055 | } | |
1056 | ||
1057 | /* check the validity of the second superblock */ | |
1058 | if (block == 0) { | |
1059 | block++; | |
1060 | goto retry; | |
1061 | } | |
1062 | ||
1063 | out: | |
1064 | /* No valid superblock */ | |
1065 | if (!*raw_super) | |
1066 | return err; | |
1067 | ||
9076a75f | 1068 | return 0; |
14d7e9de | 1069 | } |
1070 | ||
c5bda1c8 | 1071 | int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover) |
26d815ad JK |
1072 | { |
1073 | struct buffer_head *sbh = sbi->raw_super_buf; | |
1074 | sector_t block = sbh->b_blocknr; | |
1075 | int err; | |
1076 | ||
1077 | /* write back-up superblock first */ | |
1078 | sbh->b_blocknr = block ? 0 : 1; | |
1079 | mark_buffer_dirty(sbh); | |
1080 | err = sync_dirty_buffer(sbh); | |
1081 | ||
1082 | sbh->b_blocknr = block; | |
c5bda1c8 CY |
1083 | |
1084 | /* if we are in recovery path, skip writing valid superblock */ | |
1085 | if (recover || err) | |
26d815ad JK |
1086 | goto out; |
1087 | ||
1088 | /* write current valid superblock */ | |
1089 | mark_buffer_dirty(sbh); | |
1090 | err = sync_dirty_buffer(sbh); | |
1091 | out: | |
1092 | clear_buffer_write_io_error(sbh); | |
1093 | set_buffer_uptodate(sbh); | |
1094 | return err; | |
1095 | } | |
1096 | ||
aff063e2 JK |
1097 | static int f2fs_fill_super(struct super_block *sb, void *data, int silent) |
1098 | { | |
1099 | struct f2fs_sb_info *sbi; | |
da554e48 | 1100 | struct f2fs_super_block *raw_super; |
aff063e2 JK |
1101 | struct buffer_head *raw_super_buf; |
1102 | struct inode *root; | |
da554e48 | 1103 | long err; |
2adc3505 | 1104 | bool retry = true, need_fsck = false; |
dabc4a5c | 1105 | char *options = NULL; |
da554e48 | 1106 | int recovery, i; |
aff063e2 | 1107 | |
ed2e621a | 1108 | try_onemore: |
da554e48 | 1109 | err = -EINVAL; |
1110 | raw_super = NULL; | |
1111 | raw_super_buf = NULL; | |
1112 | recovery = 0; | |
1113 | ||
aff063e2 JK |
1114 | /* allocate memory for f2fs-specific super block info */ |
1115 | sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL); | |
1116 | if (!sbi) | |
1117 | return -ENOMEM; | |
1118 | ||
ff9234ad | 1119 | /* set a block size */ |
6bacf52f | 1120 | if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) { |
a07ef784 | 1121 | f2fs_msg(sb, KERN_ERR, "unable to set blocksize"); |
aff063e2 | 1122 | goto free_sbi; |
a07ef784 | 1123 | } |
aff063e2 | 1124 | |
da554e48 | 1125 | err = read_raw_super_block(sb, &raw_super, &raw_super_buf, &recovery); |
9076a75f GZ |
1126 | if (err) |
1127 | goto free_sbi; | |
1128 | ||
5fb08372 | 1129 | sb->s_fs_info = sbi; |
498c5e9f | 1130 | default_options(sbi); |
aff063e2 | 1131 | /* parse mount options */ |
dabc4a5c JK |
1132 | options = kstrdup((const char *)data, GFP_KERNEL); |
1133 | if (data && !options) { | |
1134 | err = -ENOMEM; | |
aff063e2 | 1135 | goto free_sb_buf; |
dabc4a5c JK |
1136 | } |
1137 | ||
1138 | err = parse_options(sb, options); | |
1139 | if (err) | |
1140 | goto free_options; | |
aff063e2 | 1141 | |
25ca923b | 1142 | sb->s_maxbytes = max_file_size(le32_to_cpu(raw_super->log_blocksize)); |
aff063e2 JK |
1143 | sb->s_max_links = F2FS_LINK_MAX; |
1144 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
1145 | ||
1146 | sb->s_op = &f2fs_sops; | |
1147 | sb->s_xattr = f2fs_xattr_handlers; | |
1148 | sb->s_export_op = &f2fs_export_ops; | |
1149 | sb->s_magic = F2FS_SUPER_MAGIC; | |
aff063e2 JK |
1150 | sb->s_time_gran = 1; |
1151 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
1152 | (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0); | |
1153 | memcpy(sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid)); | |
1154 | ||
1155 | /* init f2fs-specific super block info */ | |
1156 | sbi->sb = sb; | |
1157 | sbi->raw_super = raw_super; | |
1158 | sbi->raw_super_buf = raw_super_buf; | |
1159 | mutex_init(&sbi->gc_mutex); | |
5463e7c1 | 1160 | mutex_init(&sbi->writepages); |
aff063e2 | 1161 | mutex_init(&sbi->cp_mutex); |
b3582c68 | 1162 | init_rwsem(&sbi->node_write); |
caf0047e | 1163 | clear_sbi_flag(sbi, SBI_POR_DOING); |
aff063e2 | 1164 | spin_lock_init(&sbi->stat_lock); |
971767ca | 1165 | |
df0f8dc0 | 1166 | init_rwsem(&sbi->read_io.io_rwsem); |
458e6197 JK |
1167 | sbi->read_io.sbi = sbi; |
1168 | sbi->read_io.bio = NULL; | |
1169 | for (i = 0; i < NR_PAGE_TYPE; i++) { | |
df0f8dc0 | 1170 | init_rwsem(&sbi->write_io[i].io_rwsem); |
458e6197 JK |
1171 | sbi->write_io[i].sbi = sbi; |
1172 | sbi->write_io[i].bio = NULL; | |
1173 | } | |
971767ca | 1174 | |
e479556b | 1175 | init_rwsem(&sbi->cp_rwsem); |
fb51b5ef | 1176 | init_waitqueue_head(&sbi->cp_wait); |
aff063e2 JK |
1177 | init_sb_info(sbi); |
1178 | ||
1179 | /* get an inode for meta space */ | |
1180 | sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi)); | |
1181 | if (IS_ERR(sbi->meta_inode)) { | |
a07ef784 | 1182 | f2fs_msg(sb, KERN_ERR, "Failed to read F2FS meta data inode"); |
aff063e2 | 1183 | err = PTR_ERR(sbi->meta_inode); |
dabc4a5c | 1184 | goto free_options; |
aff063e2 JK |
1185 | } |
1186 | ||
1187 | err = get_valid_checkpoint(sbi); | |
a07ef784 NJ |
1188 | if (err) { |
1189 | f2fs_msg(sb, KERN_ERR, "Failed to get valid F2FS checkpoint"); | |
aff063e2 | 1190 | goto free_meta_inode; |
a07ef784 | 1191 | } |
aff063e2 JK |
1192 | |
1193 | /* sanity checking of checkpoint */ | |
1194 | err = -EINVAL; | |
577e3495 | 1195 | if (sanity_check_ckpt(sbi)) { |
a07ef784 | 1196 | f2fs_msg(sb, KERN_ERR, "Invalid F2FS checkpoint"); |
aff063e2 | 1197 | goto free_cp; |
a07ef784 | 1198 | } |
aff063e2 JK |
1199 | |
1200 | sbi->total_valid_node_count = | |
1201 | le32_to_cpu(sbi->ckpt->valid_node_count); | |
1202 | sbi->total_valid_inode_count = | |
1203 | le32_to_cpu(sbi->ckpt->valid_inode_count); | |
1204 | sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count); | |
1205 | sbi->total_valid_block_count = | |
1206 | le64_to_cpu(sbi->ckpt->valid_block_count); | |
1207 | sbi->last_valid_block_count = sbi->total_valid_block_count; | |
1208 | sbi->alloc_valid_block_count = 0; | |
1209 | INIT_LIST_HEAD(&sbi->dir_inode_list); | |
1210 | spin_lock_init(&sbi->dir_inode_lock); | |
1211 | ||
1dcc336b CY |
1212 | init_extent_cache_info(sbi); |
1213 | ||
6451e041 | 1214 | init_ino_entry_info(sbi); |
aff063e2 JK |
1215 | |
1216 | /* setup f2fs internal modules */ | |
1217 | err = build_segment_manager(sbi); | |
a07ef784 NJ |
1218 | if (err) { |
1219 | f2fs_msg(sb, KERN_ERR, | |
1220 | "Failed to initialize F2FS segment manager"); | |
aff063e2 | 1221 | goto free_sm; |
a07ef784 | 1222 | } |
aff063e2 | 1223 | err = build_node_manager(sbi); |
a07ef784 NJ |
1224 | if (err) { |
1225 | f2fs_msg(sb, KERN_ERR, | |
1226 | "Failed to initialize F2FS node manager"); | |
aff063e2 | 1227 | goto free_nm; |
a07ef784 | 1228 | } |
aff063e2 JK |
1229 | |
1230 | build_gc_manager(sbi); | |
1231 | ||
1232 | /* get an inode for node space */ | |
1233 | sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi)); | |
1234 | if (IS_ERR(sbi->node_inode)) { | |
a07ef784 | 1235 | f2fs_msg(sb, KERN_ERR, "Failed to read node inode"); |
aff063e2 JK |
1236 | err = PTR_ERR(sbi->node_inode); |
1237 | goto free_nm; | |
1238 | } | |
1239 | ||
2658e50d JK |
1240 | f2fs_join_shrinker(sbi); |
1241 | ||
aff063e2 | 1242 | /* if there are nt orphan nodes free them */ |
8f99a946 | 1243 | recover_orphan_inodes(sbi); |
aff063e2 JK |
1244 | |
1245 | /* read root inode and dentry */ | |
1246 | root = f2fs_iget(sb, F2FS_ROOT_INO(sbi)); | |
1247 | if (IS_ERR(root)) { | |
a07ef784 | 1248 | f2fs_msg(sb, KERN_ERR, "Failed to read root inode"); |
aff063e2 JK |
1249 | err = PTR_ERR(root); |
1250 | goto free_node_inode; | |
1251 | } | |
8f99a946 | 1252 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { |
9d847950 | 1253 | iput(root); |
8f99a946 | 1254 | err = -EINVAL; |
9d847950 | 1255 | goto free_node_inode; |
8f99a946 | 1256 | } |
aff063e2 JK |
1257 | |
1258 | sb->s_root = d_make_root(root); /* allocate root dentry */ | |
1259 | if (!sb->s_root) { | |
1260 | err = -ENOMEM; | |
1261 | goto free_root_inode; | |
1262 | } | |
1263 | ||
aff063e2 JK |
1264 | err = f2fs_build_stats(sbi); |
1265 | if (err) | |
6437d1b0 | 1266 | goto free_root_inode; |
aff063e2 | 1267 | |
5e176d54 JK |
1268 | if (f2fs_proc_root) |
1269 | sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root); | |
1270 | ||
1271 | if (sbi->s_proc) | |
1272 | proc_create_data("segment_info", S_IRUGO, sbi->s_proc, | |
1273 | &f2fs_seq_segment_info_fops, sb); | |
1274 | ||
b59d0bae NJ |
1275 | sbi->s_kobj.kset = f2fs_kset; |
1276 | init_completion(&sbi->s_kobj_unregister); | |
1277 | err = kobject_init_and_add(&sbi->s_kobj, &f2fs_ktype, NULL, | |
1278 | "%s", sb->s_id); | |
1279 | if (err) | |
6437d1b0 | 1280 | goto free_proc; |
b59d0bae | 1281 | |
6437d1b0 JK |
1282 | /* recover fsynced data */ |
1283 | if (!test_opt(sbi, DISABLE_ROLL_FORWARD)) { | |
081d78c2 JK |
1284 | /* |
1285 | * mount should be failed, when device has readonly mode, and | |
1286 | * previous checkpoint was not done by clean system shutdown. | |
1287 | */ | |
1288 | if (bdev_read_only(sb->s_bdev) && | |
1289 | !is_set_ckpt_flags(sbi->ckpt, CP_UMOUNT_FLAG)) { | |
1290 | err = -EROFS; | |
1291 | goto free_kobj; | |
1292 | } | |
2adc3505 CY |
1293 | |
1294 | if (need_fsck) | |
1295 | set_sbi_flag(sbi, SBI_NEED_FSCK); | |
1296 | ||
6437d1b0 | 1297 | err = recover_fsync_data(sbi); |
ed2e621a | 1298 | if (err) { |
2adc3505 | 1299 | need_fsck = true; |
6437d1b0 JK |
1300 | f2fs_msg(sb, KERN_ERR, |
1301 | "Cannot recover all fsync data errno=%ld", err); | |
ed2e621a JK |
1302 | goto free_kobj; |
1303 | } | |
6437d1b0 | 1304 | } |
b59d0bae | 1305 | |
6437d1b0 JK |
1306 | /* |
1307 | * If filesystem is not mounted as read-only then | |
1308 | * do start the gc_thread. | |
1309 | */ | |
6c029932 | 1310 | if (test_opt(sbi, BG_GC) && !f2fs_readonly(sb)) { |
6437d1b0 JK |
1311 | /* After POR, we can run background GC thread.*/ |
1312 | err = start_gc_thread(sbi); | |
1313 | if (err) | |
1314 | goto free_kobj; | |
1315 | } | |
dabc4a5c | 1316 | kfree(options); |
da554e48 | 1317 | |
1318 | /* recover broken superblock */ | |
1319 | if (recovery && !f2fs_readonly(sb) && !bdev_read_only(sb->s_bdev)) { | |
1320 | f2fs_msg(sb, KERN_INFO, "Recover invalid superblock"); | |
c5bda1c8 | 1321 | f2fs_commit_super(sbi, true); |
da554e48 | 1322 | } |
1323 | ||
aff063e2 | 1324 | return 0; |
6437d1b0 JK |
1325 | |
1326 | free_kobj: | |
1327 | kobject_del(&sbi->s_kobj); | |
1328 | free_proc: | |
1d15bd20 CY |
1329 | if (sbi->s_proc) { |
1330 | remove_proc_entry("segment_info", sbi->s_proc); | |
1331 | remove_proc_entry(sb->s_id, f2fs_proc_root); | |
1332 | } | |
1333 | f2fs_destroy_stats(sbi); | |
aff063e2 JK |
1334 | free_root_inode: |
1335 | dput(sb->s_root); | |
1336 | sb->s_root = NULL; | |
1337 | free_node_inode: | |
2658e50d JK |
1338 | mutex_lock(&sbi->umount_mutex); |
1339 | f2fs_leave_shrinker(sbi); | |
aff063e2 | 1340 | iput(sbi->node_inode); |
2658e50d | 1341 | mutex_unlock(&sbi->umount_mutex); |
aff063e2 JK |
1342 | free_nm: |
1343 | destroy_node_manager(sbi); | |
1344 | free_sm: | |
1345 | destroy_segment_manager(sbi); | |
1346 | free_cp: | |
1347 | kfree(sbi->ckpt); | |
1348 | free_meta_inode: | |
1349 | make_bad_inode(sbi->meta_inode); | |
1350 | iput(sbi->meta_inode); | |
dabc4a5c JK |
1351 | free_options: |
1352 | kfree(options); | |
aff063e2 JK |
1353 | free_sb_buf: |
1354 | brelse(raw_super_buf); | |
1355 | free_sbi: | |
1356 | kfree(sbi); | |
ed2e621a JK |
1357 | |
1358 | /* give only one another chance */ | |
1359 | if (retry) { | |
9df47ba7 | 1360 | retry = false; |
ed2e621a JK |
1361 | shrink_dcache_sb(sb); |
1362 | goto try_onemore; | |
1363 | } | |
aff063e2 JK |
1364 | return err; |
1365 | } | |
1366 | ||
1367 | static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags, | |
1368 | const char *dev_name, void *data) | |
1369 | { | |
1370 | return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super); | |
1371 | } | |
1372 | ||
30a5537f JK |
1373 | static void kill_f2fs_super(struct super_block *sb) |
1374 | { | |
1375 | if (sb->s_root) | |
caf0047e | 1376 | set_sbi_flag(F2FS_SB(sb), SBI_IS_CLOSE); |
30a5537f JK |
1377 | kill_block_super(sb); |
1378 | } | |
1379 | ||
aff063e2 JK |
1380 | static struct file_system_type f2fs_fs_type = { |
1381 | .owner = THIS_MODULE, | |
1382 | .name = "f2fs", | |
1383 | .mount = f2fs_mount, | |
30a5537f | 1384 | .kill_sb = kill_f2fs_super, |
aff063e2 JK |
1385 | .fs_flags = FS_REQUIRES_DEV, |
1386 | }; | |
7f78e035 | 1387 | MODULE_ALIAS_FS("f2fs"); |
aff063e2 | 1388 | |
6e6093a8 | 1389 | static int __init init_inodecache(void) |
aff063e2 JK |
1390 | { |
1391 | f2fs_inode_cachep = f2fs_kmem_cache_create("f2fs_inode_cache", | |
e8512d2e | 1392 | sizeof(struct f2fs_inode_info)); |
6bacf52f | 1393 | if (!f2fs_inode_cachep) |
aff063e2 JK |
1394 | return -ENOMEM; |
1395 | return 0; | |
1396 | } | |
1397 | ||
1398 | static void destroy_inodecache(void) | |
1399 | { | |
1400 | /* | |
1401 | * Make sure all delayed rcu free inodes are flushed before we | |
1402 | * destroy cache. | |
1403 | */ | |
1404 | rcu_barrier(); | |
1405 | kmem_cache_destroy(f2fs_inode_cachep); | |
1406 | } | |
1407 | ||
1408 | static int __init init_f2fs_fs(void) | |
1409 | { | |
1410 | int err; | |
1411 | ||
c0508650 JK |
1412 | f2fs_build_trace_ios(); |
1413 | ||
aff063e2 JK |
1414 | err = init_inodecache(); |
1415 | if (err) | |
1416 | goto fail; | |
1417 | err = create_node_manager_caches(); | |
1418 | if (err) | |
9890ff3f | 1419 | goto free_inodecache; |
7fd9e544 | 1420 | err = create_segment_manager_caches(); |
aff063e2 | 1421 | if (err) |
9890ff3f | 1422 | goto free_node_manager_caches; |
aff063e2 JK |
1423 | err = create_checkpoint_caches(); |
1424 | if (err) | |
06292073 | 1425 | goto free_segment_manager_caches; |
1dcc336b CY |
1426 | err = create_extent_cache(); |
1427 | if (err) | |
1428 | goto free_checkpoint_caches; | |
b59d0bae | 1429 | f2fs_kset = kset_create_and_add("f2fs", NULL, fs_kobj); |
6e6b978c WY |
1430 | if (!f2fs_kset) { |
1431 | err = -ENOMEM; | |
1dcc336b | 1432 | goto free_extent_cache; |
6e6b978c | 1433 | } |
cfc4d971 | 1434 | err = f2fs_init_crypto(); |
4589d25d | 1435 | if (err) |
9890ff3f | 1436 | goto free_kset; |
2658e50d JK |
1437 | |
1438 | err = register_shrinker(&f2fs_shrinker_info); | |
cfc4d971 JK |
1439 | if (err) |
1440 | goto free_crypto; | |
2658e50d JK |
1441 | |
1442 | err = register_filesystem(&f2fs_fs_type); | |
1443 | if (err) | |
1444 | goto free_shrinker; | |
4589d25d | 1445 | f2fs_create_root_stats(); |
5e176d54 | 1446 | f2fs_proc_root = proc_mkdir("fs/f2fs", NULL); |
9890ff3f ZH |
1447 | return 0; |
1448 | ||
2658e50d JK |
1449 | free_shrinker: |
1450 | unregister_shrinker(&f2fs_shrinker_info); | |
cfc4d971 JK |
1451 | free_crypto: |
1452 | f2fs_exit_crypto(); | |
9890ff3f ZH |
1453 | free_kset: |
1454 | kset_unregister(f2fs_kset); | |
1dcc336b CY |
1455 | free_extent_cache: |
1456 | destroy_extent_cache(); | |
9890ff3f ZH |
1457 | free_checkpoint_caches: |
1458 | destroy_checkpoint_caches(); | |
7fd9e544 JK |
1459 | free_segment_manager_caches: |
1460 | destroy_segment_manager_caches(); | |
9890ff3f ZH |
1461 | free_node_manager_caches: |
1462 | destroy_node_manager_caches(); | |
1463 | free_inodecache: | |
1464 | destroy_inodecache(); | |
aff063e2 JK |
1465 | fail: |
1466 | return err; | |
1467 | } | |
1468 | ||
1469 | static void __exit exit_f2fs_fs(void) | |
1470 | { | |
5e176d54 | 1471 | remove_proc_entry("fs/f2fs", NULL); |
4589d25d | 1472 | f2fs_destroy_root_stats(); |
2658e50d | 1473 | unregister_shrinker(&f2fs_shrinker_info); |
aff063e2 | 1474 | unregister_filesystem(&f2fs_fs_type); |
cfc4d971 | 1475 | f2fs_exit_crypto(); |
fdf6c8be | 1476 | destroy_extent_cache(); |
aff063e2 | 1477 | destroy_checkpoint_caches(); |
5dcd8a71 | 1478 | destroy_segment_manager_caches(); |
aff063e2 JK |
1479 | destroy_node_manager_caches(); |
1480 | destroy_inodecache(); | |
b59d0bae | 1481 | kset_unregister(f2fs_kset); |
351f4fba | 1482 | f2fs_destroy_trace_ios(); |
aff063e2 JK |
1483 | } |
1484 | ||
1485 | module_init(init_f2fs_fs) | |
1486 | module_exit(exit_f2fs_fs) | |
1487 | ||
1488 | MODULE_AUTHOR("Samsung Electronics's Praesto Team"); | |
1489 | MODULE_DESCRIPTION("Flash Friendly File System"); | |
1490 | MODULE_LICENSE("GPL"); |