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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; | |
d928bfbf | 425 | init_rwsem(&fi->i_sem); |
34ba94ba | 426 | INIT_RADIX_TREE(&fi->inmem_root, GFP_NOFS); |
88b88a66 JK |
427 | INIT_LIST_HEAD(&fi->inmem_pages); |
428 | mutex_init(&fi->inmem_lock); | |
aff063e2 JK |
429 | |
430 | set_inode_flag(fi, FI_NEW_INODE); | |
431 | ||
444c580f JK |
432 | if (test_opt(F2FS_SB(sb), INLINE_XATTR)) |
433 | set_inode_flag(fi, FI_INLINE_XATTR); | |
434 | ||
ab9fa662 JK |
435 | /* Will be used by directory only */ |
436 | fi->i_dir_level = F2FS_SB(sb)->dir_level; | |
437 | ||
57e5055b JK |
438 | #ifdef CONFIG_F2FS_FS_ENCRYPTION |
439 | fi->i_crypt_info = NULL; | |
440 | #endif | |
aff063e2 JK |
441 | return &fi->vfs_inode; |
442 | } | |
443 | ||
531ad7d5 JK |
444 | static int f2fs_drop_inode(struct inode *inode) |
445 | { | |
446 | /* | |
447 | * This is to avoid a deadlock condition like below. | |
448 | * writeback_single_inode(inode) | |
449 | * - f2fs_write_data_page | |
450 | * - f2fs_gc -> iput -> evict | |
451 | * - inode_wait_for_writeback(inode) | |
452 | */ | |
06e1bc05 JK |
453 | if (!inode_unhashed(inode) && inode->i_state & I_SYNC) { |
454 | if (!inode->i_nlink && !is_bad_inode(inode)) { | |
3e72f721 JK |
455 | /* to avoid evict_inode call simultaneously */ |
456 | atomic_inc(&inode->i_count); | |
06e1bc05 JK |
457 | spin_unlock(&inode->i_lock); |
458 | ||
459 | /* some remained atomic pages should discarded */ | |
460 | if (f2fs_is_atomic_file(inode)) | |
461 | commit_inmem_pages(inode, true); | |
462 | ||
3e72f721 JK |
463 | /* should remain fi->extent_tree for writepage */ |
464 | f2fs_destroy_extent_node(inode); | |
465 | ||
06e1bc05 JK |
466 | sb_start_intwrite(inode->i_sb); |
467 | i_size_write(inode, 0); | |
468 | ||
469 | if (F2FS_HAS_BLOCKS(inode)) | |
470 | f2fs_truncate(inode); | |
471 | ||
472 | sb_end_intwrite(inode->i_sb); | |
473 | ||
474 | #ifdef CONFIG_F2FS_FS_ENCRYPTION | |
475 | if (F2FS_I(inode)->i_crypt_info) | |
26bf3dc7 JK |
476 | f2fs_free_encryption_info(inode, |
477 | F2FS_I(inode)->i_crypt_info); | |
06e1bc05 JK |
478 | #endif |
479 | spin_lock(&inode->i_lock); | |
3e72f721 | 480 | atomic_dec(&inode->i_count); |
06e1bc05 | 481 | } |
531ad7d5 | 482 | return 0; |
06e1bc05 | 483 | } |
531ad7d5 JK |
484 | return generic_drop_inode(inode); |
485 | } | |
486 | ||
b3783873 JK |
487 | /* |
488 | * f2fs_dirty_inode() is called from __mark_inode_dirty() | |
489 | * | |
490 | * We should call set_dirty_inode to write the dirty inode through write_inode. | |
491 | */ | |
492 | static void f2fs_dirty_inode(struct inode *inode, int flags) | |
493 | { | |
494 | set_inode_flag(F2FS_I(inode), FI_DIRTY_INODE); | |
b3783873 JK |
495 | } |
496 | ||
aff063e2 JK |
497 | static void f2fs_i_callback(struct rcu_head *head) |
498 | { | |
499 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
500 | kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode)); | |
501 | } | |
502 | ||
25ca923b | 503 | static void f2fs_destroy_inode(struct inode *inode) |
aff063e2 JK |
504 | { |
505 | call_rcu(&inode->i_rcu, f2fs_i_callback); | |
506 | } | |
507 | ||
508 | static void f2fs_put_super(struct super_block *sb) | |
509 | { | |
510 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
511 | ||
5e176d54 JK |
512 | if (sbi->s_proc) { |
513 | remove_proc_entry("segment_info", sbi->s_proc); | |
514 | remove_proc_entry(sb->s_id, f2fs_proc_root); | |
515 | } | |
b59d0bae | 516 | kobject_del(&sbi->s_kobj); |
5e176d54 | 517 | |
aff063e2 JK |
518 | stop_gc_thread(sbi); |
519 | ||
2658e50d JK |
520 | /* prevent remaining shrinker jobs */ |
521 | mutex_lock(&sbi->umount_mutex); | |
522 | ||
85dc2f2c JK |
523 | /* |
524 | * We don't need to do checkpoint when superblock is clean. | |
525 | * But, the previous checkpoint was not done by umount, it needs to do | |
526 | * clean checkpoint again. | |
527 | */ | |
caf0047e | 528 | if (is_sbi_flag_set(sbi, SBI_IS_DIRTY) || |
85dc2f2c | 529 | !is_set_ckpt_flags(F2FS_CKPT(sbi), CP_UMOUNT_FLAG)) { |
75ab4cb8 JK |
530 | struct cp_control cpc = { |
531 | .reason = CP_UMOUNT, | |
532 | }; | |
533 | write_checkpoint(sbi, &cpc); | |
534 | } | |
aff063e2 | 535 | |
eca616f8 JK |
536 | /* write_checkpoint can update stat informaion */ |
537 | f2fs_destroy_stats(sbi); | |
538 | ||
cf779cab JK |
539 | /* |
540 | * normally superblock is clean, so we need to release this. | |
541 | * In addition, EIO will skip do checkpoint, we need this as well. | |
542 | */ | |
6f12ac25 | 543 | release_dirty_inode(sbi); |
4b2fecc8 | 544 | release_discard_addrs(sbi); |
6f12ac25 | 545 | |
2658e50d JK |
546 | f2fs_leave_shrinker(sbi); |
547 | mutex_unlock(&sbi->umount_mutex); | |
548 | ||
aff063e2 JK |
549 | iput(sbi->node_inode); |
550 | iput(sbi->meta_inode); | |
551 | ||
552 | /* destroy f2fs internal modules */ | |
553 | destroy_node_manager(sbi); | |
554 | destroy_segment_manager(sbi); | |
555 | ||
556 | kfree(sbi->ckpt); | |
b59d0bae NJ |
557 | kobject_put(&sbi->s_kobj); |
558 | wait_for_completion(&sbi->s_kobj_unregister); | |
aff063e2 JK |
559 | |
560 | sb->s_fs_info = NULL; | |
561 | brelse(sbi->raw_super_buf); | |
562 | kfree(sbi); | |
563 | } | |
564 | ||
565 | int f2fs_sync_fs(struct super_block *sb, int sync) | |
566 | { | |
567 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
aff063e2 | 568 | |
a2a4a7e4 NJ |
569 | trace_f2fs_sync_fs(sb, sync); |
570 | ||
b7473754 | 571 | if (sync) { |
d5053a34 JK |
572 | struct cp_control cpc; |
573 | ||
119ee914 JK |
574 | cpc.reason = __get_cp_reason(sbi); |
575 | ||
b7473754 | 576 | mutex_lock(&sbi->gc_mutex); |
75ab4cb8 | 577 | write_checkpoint(sbi, &cpc); |
b7473754 JK |
578 | mutex_unlock(&sbi->gc_mutex); |
579 | } else { | |
7d82db83 | 580 | f2fs_balance_fs(sbi); |
b7473754 | 581 | } |
05ca3632 | 582 | f2fs_trace_ios(NULL, 1); |
aff063e2 | 583 | |
64c576fe | 584 | return 0; |
aff063e2 JK |
585 | } |
586 | ||
d6212a5f CL |
587 | static int f2fs_freeze(struct super_block *sb) |
588 | { | |
589 | int err; | |
590 | ||
77888c1e | 591 | if (f2fs_readonly(sb)) |
d6212a5f CL |
592 | return 0; |
593 | ||
594 | err = f2fs_sync_fs(sb, 1); | |
595 | return err; | |
596 | } | |
597 | ||
598 | static int f2fs_unfreeze(struct super_block *sb) | |
599 | { | |
600 | return 0; | |
601 | } | |
602 | ||
aff063e2 JK |
603 | static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf) |
604 | { | |
605 | struct super_block *sb = dentry->d_sb; | |
606 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
607 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); | |
608 | block_t total_count, user_block_count, start_count, ovp_count; | |
609 | ||
610 | total_count = le64_to_cpu(sbi->raw_super->block_count); | |
611 | user_block_count = sbi->user_block_count; | |
612 | start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr); | |
613 | ovp_count = SM_I(sbi)->ovp_segments << sbi->log_blocks_per_seg; | |
614 | buf->f_type = F2FS_SUPER_MAGIC; | |
615 | buf->f_bsize = sbi->blocksize; | |
616 | ||
617 | buf->f_blocks = total_count - start_count; | |
618 | buf->f_bfree = buf->f_blocks - valid_user_blocks(sbi) - ovp_count; | |
619 | buf->f_bavail = user_block_count - valid_user_blocks(sbi); | |
620 | ||
c200b1aa CY |
621 | buf->f_files = sbi->total_node_count - F2FS_RESERVED_NODE_NUM; |
622 | buf->f_ffree = buf->f_files - valid_inode_count(sbi); | |
aff063e2 | 623 | |
5a20d339 | 624 | buf->f_namelen = F2FS_NAME_LEN; |
aff063e2 JK |
625 | buf->f_fsid.val[0] = (u32)id; |
626 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
627 | ||
628 | return 0; | |
629 | } | |
630 | ||
631 | static int f2fs_show_options(struct seq_file *seq, struct dentry *root) | |
632 | { | |
633 | struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb); | |
634 | ||
b270ad6f | 635 | if (!f2fs_readonly(sbi->sb) && test_opt(sbi, BG_GC)) |
696c018c | 636 | seq_printf(seq, ",background_gc=%s", "on"); |
aff063e2 | 637 | else |
696c018c | 638 | seq_printf(seq, ",background_gc=%s", "off"); |
aff063e2 JK |
639 | if (test_opt(sbi, DISABLE_ROLL_FORWARD)) |
640 | seq_puts(seq, ",disable_roll_forward"); | |
641 | if (test_opt(sbi, DISCARD)) | |
642 | seq_puts(seq, ",discard"); | |
643 | if (test_opt(sbi, NOHEAP)) | |
644 | seq_puts(seq, ",no_heap_alloc"); | |
645 | #ifdef CONFIG_F2FS_FS_XATTR | |
646 | if (test_opt(sbi, XATTR_USER)) | |
647 | seq_puts(seq, ",user_xattr"); | |
648 | else | |
649 | seq_puts(seq, ",nouser_xattr"); | |
444c580f JK |
650 | if (test_opt(sbi, INLINE_XATTR)) |
651 | seq_puts(seq, ",inline_xattr"); | |
aff063e2 JK |
652 | #endif |
653 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
654 | if (test_opt(sbi, POSIX_ACL)) | |
655 | seq_puts(seq, ",acl"); | |
656 | else | |
657 | seq_puts(seq, ",noacl"); | |
658 | #endif | |
659 | if (test_opt(sbi, DISABLE_EXT_IDENTIFY)) | |
aa43507f | 660 | seq_puts(seq, ",disable_ext_identify"); |
8274de77 HL |
661 | if (test_opt(sbi, INLINE_DATA)) |
662 | seq_puts(seq, ",inline_data"); | |
75342797 WL |
663 | else |
664 | seq_puts(seq, ",noinline_data"); | |
5efd3c6f CY |
665 | if (test_opt(sbi, INLINE_DENTRY)) |
666 | seq_puts(seq, ",inline_dentry"); | |
b270ad6f | 667 | if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE)) |
6b4afdd7 | 668 | seq_puts(seq, ",flush_merge"); |
0f7b2abd JK |
669 | if (test_opt(sbi, NOBARRIER)) |
670 | seq_puts(seq, ",nobarrier"); | |
d5053a34 JK |
671 | if (test_opt(sbi, FASTBOOT)) |
672 | seq_puts(seq, ",fastboot"); | |
89672159 CY |
673 | if (test_opt(sbi, EXTENT_CACHE)) |
674 | seq_puts(seq, ",extent_cache"); | |
7daaea25 JK |
675 | else |
676 | seq_puts(seq, ",noextent_cache"); | |
aff063e2 JK |
677 | seq_printf(seq, ",active_logs=%u", sbi->active_logs); |
678 | ||
679 | return 0; | |
680 | } | |
681 | ||
5e176d54 JK |
682 | static int segment_info_seq_show(struct seq_file *seq, void *offset) |
683 | { | |
684 | struct super_block *sb = seq->private; | |
685 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
6c311ec6 CF |
686 | unsigned int total_segs = |
687 | le32_to_cpu(sbi->raw_super->segment_count_main); | |
5e176d54 JK |
688 | int i; |
689 | ||
90aa6dc9 CY |
690 | seq_puts(seq, "format: segment_type|valid_blocks\n" |
691 | "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n"); | |
692 | ||
5e176d54 | 693 | for (i = 0; i < total_segs; i++) { |
90aa6dc9 CY |
694 | struct seg_entry *se = get_seg_entry(sbi, i); |
695 | ||
696 | if ((i % 10) == 0) | |
697 | seq_printf(seq, "%-5d", i); | |
698 | seq_printf(seq, "%d|%-3u", se->type, | |
699 | get_valid_blocks(sbi, i, 1)); | |
46c04366 GZ |
700 | if ((i % 10) == 9 || i == (total_segs - 1)) |
701 | seq_putc(seq, '\n'); | |
5e176d54 | 702 | else |
46c04366 | 703 | seq_putc(seq, ' '); |
5e176d54 | 704 | } |
46c04366 | 705 | |
5e176d54 JK |
706 | return 0; |
707 | } | |
708 | ||
709 | static int segment_info_open_fs(struct inode *inode, struct file *file) | |
710 | { | |
711 | return single_open(file, segment_info_seq_show, PDE_DATA(inode)); | |
712 | } | |
713 | ||
714 | static const struct file_operations f2fs_seq_segment_info_fops = { | |
715 | .owner = THIS_MODULE, | |
716 | .open = segment_info_open_fs, | |
717 | .read = seq_read, | |
718 | .llseek = seq_lseek, | |
719 | .release = single_release, | |
720 | }; | |
721 | ||
498c5e9f YH |
722 | static void default_options(struct f2fs_sb_info *sbi) |
723 | { | |
724 | /* init some FS parameters */ | |
725 | sbi->active_logs = NR_CURSEG_TYPE; | |
726 | ||
727 | set_opt(sbi, BG_GC); | |
728 | set_opt(sbi, INLINE_DATA); | |
3e72f721 | 729 | set_opt(sbi, EXTENT_CACHE); |
498c5e9f YH |
730 | |
731 | #ifdef CONFIG_F2FS_FS_XATTR | |
732 | set_opt(sbi, XATTR_USER); | |
733 | #endif | |
734 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
735 | set_opt(sbi, POSIX_ACL); | |
736 | #endif | |
737 | } | |
738 | ||
696c018c NJ |
739 | static int f2fs_remount(struct super_block *sb, int *flags, char *data) |
740 | { | |
741 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
742 | struct f2fs_mount_info org_mount_opt; | |
743 | int err, active_logs; | |
876dc59e GZ |
744 | bool need_restart_gc = false; |
745 | bool need_stop_gc = false; | |
696c018c | 746 | |
02b9984d TT |
747 | sync_filesystem(sb); |
748 | ||
696c018c NJ |
749 | /* |
750 | * Save the old mount options in case we | |
751 | * need to restore them. | |
752 | */ | |
753 | org_mount_opt = sbi->mount_opt; | |
754 | active_logs = sbi->active_logs; | |
755 | ||
26666c8a | 756 | sbi->mount_opt.opt = 0; |
498c5e9f | 757 | default_options(sbi); |
26666c8a | 758 | |
696c018c NJ |
759 | /* parse mount options */ |
760 | err = parse_options(sb, data); | |
761 | if (err) | |
762 | goto restore_opts; | |
763 | ||
764 | /* | |
765 | * Previous and new state of filesystem is RO, | |
876dc59e | 766 | * so skip checking GC and FLUSH_MERGE conditions. |
696c018c | 767 | */ |
6b2920a5 | 768 | if (f2fs_readonly(sb) && (*flags & MS_RDONLY)) |
696c018c NJ |
769 | goto skip; |
770 | ||
771 | /* | |
772 | * We stop the GC thread if FS is mounted as RO | |
773 | * or if background_gc = off is passed in mount | |
774 | * option. Also sync the filesystem. | |
775 | */ | |
776 | if ((*flags & MS_RDONLY) || !test_opt(sbi, BG_GC)) { | |
777 | if (sbi->gc_thread) { | |
778 | stop_gc_thread(sbi); | |
779 | f2fs_sync_fs(sb, 1); | |
876dc59e | 780 | need_restart_gc = true; |
696c018c | 781 | } |
aba291b3 | 782 | } else if (!sbi->gc_thread) { |
696c018c NJ |
783 | err = start_gc_thread(sbi); |
784 | if (err) | |
785 | goto restore_opts; | |
876dc59e GZ |
786 | need_stop_gc = true; |
787 | } | |
788 | ||
789 | /* | |
790 | * We stop issue flush thread if FS is mounted as RO | |
791 | * or if flush_merge is not passed in mount option. | |
792 | */ | |
793 | if ((*flags & MS_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) { | |
2163d198 | 794 | destroy_flush_cmd_control(sbi); |
aba291b3 | 795 | } else if (!SM_I(sbi)->cmd_control_info) { |
2163d198 GZ |
796 | err = create_flush_cmd_control(sbi); |
797 | if (err) | |
a688b9d9 | 798 | goto restore_gc; |
696c018c NJ |
799 | } |
800 | skip: | |
801 | /* Update the POSIXACL Flag */ | |
802 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
803 | (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0); | |
804 | return 0; | |
876dc59e GZ |
805 | restore_gc: |
806 | if (need_restart_gc) { | |
807 | if (start_gc_thread(sbi)) | |
808 | f2fs_msg(sbi->sb, KERN_WARNING, | |
e1c42045 | 809 | "background gc thread has stopped"); |
876dc59e GZ |
810 | } else if (need_stop_gc) { |
811 | stop_gc_thread(sbi); | |
812 | } | |
696c018c NJ |
813 | restore_opts: |
814 | sbi->mount_opt = org_mount_opt; | |
815 | sbi->active_logs = active_logs; | |
816 | return err; | |
817 | } | |
818 | ||
aff063e2 JK |
819 | static struct super_operations f2fs_sops = { |
820 | .alloc_inode = f2fs_alloc_inode, | |
531ad7d5 | 821 | .drop_inode = f2fs_drop_inode, |
aff063e2 JK |
822 | .destroy_inode = f2fs_destroy_inode, |
823 | .write_inode = f2fs_write_inode, | |
b3783873 | 824 | .dirty_inode = f2fs_dirty_inode, |
aff063e2 JK |
825 | .show_options = f2fs_show_options, |
826 | .evict_inode = f2fs_evict_inode, | |
827 | .put_super = f2fs_put_super, | |
828 | .sync_fs = f2fs_sync_fs, | |
d6212a5f CL |
829 | .freeze_fs = f2fs_freeze, |
830 | .unfreeze_fs = f2fs_unfreeze, | |
aff063e2 | 831 | .statfs = f2fs_statfs, |
696c018c | 832 | .remount_fs = f2fs_remount, |
aff063e2 JK |
833 | }; |
834 | ||
835 | static struct inode *f2fs_nfs_get_inode(struct super_block *sb, | |
836 | u64 ino, u32 generation) | |
837 | { | |
838 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
839 | struct inode *inode; | |
840 | ||
d6b7d4b3 | 841 | if (check_nid_range(sbi, ino)) |
910bb12d | 842 | return ERR_PTR(-ESTALE); |
aff063e2 JK |
843 | |
844 | /* | |
845 | * f2fs_iget isn't quite right if the inode is currently unallocated! | |
846 | * However f2fs_iget currently does appropriate checks to handle stale | |
847 | * inodes so everything is OK. | |
848 | */ | |
849 | inode = f2fs_iget(sb, ino); | |
850 | if (IS_ERR(inode)) | |
851 | return ERR_CAST(inode); | |
6bacf52f | 852 | if (unlikely(generation && inode->i_generation != generation)) { |
aff063e2 JK |
853 | /* we didn't find the right inode.. */ |
854 | iput(inode); | |
855 | return ERR_PTR(-ESTALE); | |
856 | } | |
857 | return inode; | |
858 | } | |
859 | ||
860 | static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
861 | int fh_len, int fh_type) | |
862 | { | |
863 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
864 | f2fs_nfs_get_inode); | |
865 | } | |
866 | ||
867 | static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid, | |
868 | int fh_len, int fh_type) | |
869 | { | |
870 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
871 | f2fs_nfs_get_inode); | |
872 | } | |
873 | ||
874 | static const struct export_operations f2fs_export_ops = { | |
875 | .fh_to_dentry = f2fs_fh_to_dentry, | |
876 | .fh_to_parent = f2fs_fh_to_parent, | |
877 | .get_parent = f2fs_get_parent, | |
878 | }; | |
879 | ||
aff063e2 JK |
880 | static loff_t max_file_size(unsigned bits) |
881 | { | |
de93653f | 882 | loff_t result = (DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS); |
aff063e2 JK |
883 | loff_t leaf_count = ADDRS_PER_BLOCK; |
884 | ||
885 | /* two direct node blocks */ | |
886 | result += (leaf_count * 2); | |
887 | ||
888 | /* two indirect node blocks */ | |
889 | leaf_count *= NIDS_PER_BLOCK; | |
890 | result += (leaf_count * 2); | |
891 | ||
892 | /* one double indirect node block */ | |
893 | leaf_count *= NIDS_PER_BLOCK; | |
894 | result += leaf_count; | |
895 | ||
896 | result <<= bits; | |
897 | return result; | |
898 | } | |
899 | ||
a07ef784 NJ |
900 | static int sanity_check_raw_super(struct super_block *sb, |
901 | struct f2fs_super_block *raw_super) | |
aff063e2 JK |
902 | { |
903 | unsigned int blocksize; | |
904 | ||
a07ef784 NJ |
905 | if (F2FS_SUPER_MAGIC != le32_to_cpu(raw_super->magic)) { |
906 | f2fs_msg(sb, KERN_INFO, | |
907 | "Magic Mismatch, valid(0x%x) - read(0x%x)", | |
908 | F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic)); | |
aff063e2 | 909 | return 1; |
a07ef784 | 910 | } |
aff063e2 | 911 | |
5c9b4692 | 912 | /* Currently, support only 4KB page cache size */ |
913 | if (F2FS_BLKSIZE != PAGE_CACHE_SIZE) { | |
914 | f2fs_msg(sb, KERN_INFO, | |
14d7e9de | 915 | "Invalid page_cache_size (%lu), supports only 4KB\n", |
5c9b4692 | 916 | PAGE_CACHE_SIZE); |
917 | return 1; | |
918 | } | |
919 | ||
aff063e2 JK |
920 | /* Currently, support only 4KB block size */ |
921 | blocksize = 1 << le32_to_cpu(raw_super->log_blocksize); | |
5c9b4692 | 922 | if (blocksize != F2FS_BLKSIZE) { |
a07ef784 NJ |
923 | f2fs_msg(sb, KERN_INFO, |
924 | "Invalid blocksize (%u), supports only 4KB\n", | |
925 | blocksize); | |
aff063e2 | 926 | return 1; |
a07ef784 | 927 | } |
5c9b4692 | 928 | |
55cf9cb6 CY |
929 | /* Currently, support 512/1024/2048/4096 bytes sector size */ |
930 | if (le32_to_cpu(raw_super->log_sectorsize) > | |
931 | F2FS_MAX_LOG_SECTOR_SIZE || | |
932 | le32_to_cpu(raw_super->log_sectorsize) < | |
933 | F2FS_MIN_LOG_SECTOR_SIZE) { | |
934 | f2fs_msg(sb, KERN_INFO, "Invalid log sectorsize (%u)", | |
935 | le32_to_cpu(raw_super->log_sectorsize)); | |
aff063e2 | 936 | return 1; |
a07ef784 | 937 | } |
55cf9cb6 CY |
938 | if (le32_to_cpu(raw_super->log_sectors_per_block) + |
939 | le32_to_cpu(raw_super->log_sectorsize) != | |
940 | F2FS_MAX_LOG_SECTOR_SIZE) { | |
941 | f2fs_msg(sb, KERN_INFO, | |
942 | "Invalid log sectors per block(%u) log sectorsize(%u)", | |
943 | le32_to_cpu(raw_super->log_sectors_per_block), | |
944 | le32_to_cpu(raw_super->log_sectorsize)); | |
aff063e2 | 945 | return 1; |
a07ef784 | 946 | } |
aff063e2 JK |
947 | return 0; |
948 | } | |
949 | ||
577e3495 | 950 | static int sanity_check_ckpt(struct f2fs_sb_info *sbi) |
aff063e2 JK |
951 | { |
952 | unsigned int total, fsmeta; | |
577e3495 JK |
953 | struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); |
954 | struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); | |
aff063e2 JK |
955 | |
956 | total = le32_to_cpu(raw_super->segment_count); | |
957 | fsmeta = le32_to_cpu(raw_super->segment_count_ckpt); | |
958 | fsmeta += le32_to_cpu(raw_super->segment_count_sit); | |
959 | fsmeta += le32_to_cpu(raw_super->segment_count_nat); | |
960 | fsmeta += le32_to_cpu(ckpt->rsvd_segment_count); | |
961 | fsmeta += le32_to_cpu(raw_super->segment_count_ssa); | |
962 | ||
6bacf52f | 963 | if (unlikely(fsmeta >= total)) |
aff063e2 | 964 | return 1; |
577e3495 | 965 | |
1e968fdf | 966 | if (unlikely(f2fs_cp_error(sbi))) { |
577e3495 JK |
967 | f2fs_msg(sbi->sb, KERN_ERR, "A bug case: need to run fsck"); |
968 | return 1; | |
969 | } | |
aff063e2 JK |
970 | return 0; |
971 | } | |
972 | ||
973 | static void init_sb_info(struct f2fs_sb_info *sbi) | |
974 | { | |
975 | struct f2fs_super_block *raw_super = sbi->raw_super; | |
976 | int i; | |
977 | ||
978 | sbi->log_sectors_per_block = | |
979 | le32_to_cpu(raw_super->log_sectors_per_block); | |
980 | sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize); | |
981 | sbi->blocksize = 1 << sbi->log_blocksize; | |
982 | sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg); | |
983 | sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg; | |
984 | sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec); | |
985 | sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone); | |
986 | sbi->total_sections = le32_to_cpu(raw_super->section_count); | |
987 | sbi->total_node_count = | |
988 | (le32_to_cpu(raw_super->segment_count_nat) / 2) | |
989 | * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK; | |
990 | sbi->root_ino_num = le32_to_cpu(raw_super->root_ino); | |
991 | sbi->node_ino_num = le32_to_cpu(raw_super->node_ino); | |
992 | sbi->meta_ino_num = le32_to_cpu(raw_super->meta_ino); | |
5ec4e49f | 993 | sbi->cur_victim_sec = NULL_SECNO; |
b1c57c1c | 994 | sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH; |
aff063e2 JK |
995 | |
996 | for (i = 0; i < NR_COUNT_TYPE; i++) | |
997 | atomic_set(&sbi->nr_pages[i], 0); | |
ab9fa662 JK |
998 | |
999 | sbi->dir_level = DEF_DIR_LEVEL; | |
caf0047e | 1000 | clear_sbi_flag(sbi, SBI_NEED_FSCK); |
2658e50d JK |
1001 | |
1002 | INIT_LIST_HEAD(&sbi->s_list); | |
1003 | mutex_init(&sbi->umount_mutex); | |
aff063e2 JK |
1004 | } |
1005 | ||
9076a75f GZ |
1006 | /* |
1007 | * Read f2fs raw super block. | |
1008 | * Because we have two copies of super block, so read the first one at first, | |
1009 | * if the first one is invalid, move to read the second one. | |
1010 | */ | |
1011 | static int read_raw_super_block(struct super_block *sb, | |
1012 | struct f2fs_super_block **raw_super, | |
da554e48 | 1013 | struct buffer_head **raw_super_buf, |
1014 | int *recovery) | |
14d7e9de | 1015 | { |
9076a75f | 1016 | int block = 0; |
da554e48 | 1017 | struct buffer_head *buffer; |
1018 | struct f2fs_super_block *super; | |
1019 | int err = 0; | |
14d7e9de | 1020 | |
9076a75f | 1021 | retry: |
da554e48 | 1022 | buffer = sb_bread(sb, block); |
1023 | if (!buffer) { | |
1024 | *recovery = 1; | |
9076a75f GZ |
1025 | f2fs_msg(sb, KERN_ERR, "Unable to read %dth superblock", |
1026 | block + 1); | |
1027 | if (block == 0) { | |
1028 | block++; | |
1029 | goto retry; | |
1030 | } else { | |
da554e48 | 1031 | err = -EIO; |
1032 | goto out; | |
9076a75f | 1033 | } |
14d7e9de | 1034 | } |
1035 | ||
da554e48 | 1036 | super = (struct f2fs_super_block *) |
1037 | ((char *)(buffer)->b_data + F2FS_SUPER_OFFSET); | |
14d7e9de | 1038 | |
1039 | /* sanity checking of raw super */ | |
da554e48 | 1040 | if (sanity_check_raw_super(sb, super)) { |
1041 | brelse(buffer); | |
1042 | *recovery = 1; | |
6c311ec6 CF |
1043 | f2fs_msg(sb, KERN_ERR, |
1044 | "Can't find valid F2FS filesystem in %dth superblock", | |
1045 | block + 1); | |
6bacf52f | 1046 | if (block == 0) { |
9076a75f GZ |
1047 | block++; |
1048 | goto retry; | |
1049 | } else { | |
da554e48 | 1050 | err = -EINVAL; |
1051 | goto out; | |
9076a75f GZ |
1052 | } |
1053 | } | |
14d7e9de | 1054 | |
da554e48 | 1055 | if (!*raw_super) { |
1056 | *raw_super_buf = buffer; | |
1057 | *raw_super = super; | |
1058 | } else { | |
1059 | /* already have a valid superblock */ | |
1060 | brelse(buffer); | |
1061 | } | |
1062 | ||
1063 | /* check the validity of the second superblock */ | |
1064 | if (block == 0) { | |
1065 | block++; | |
1066 | goto retry; | |
1067 | } | |
1068 | ||
1069 | out: | |
1070 | /* No valid superblock */ | |
1071 | if (!*raw_super) | |
1072 | return err; | |
1073 | ||
9076a75f | 1074 | return 0; |
14d7e9de | 1075 | } |
1076 | ||
c5bda1c8 | 1077 | int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover) |
26d815ad JK |
1078 | { |
1079 | struct buffer_head *sbh = sbi->raw_super_buf; | |
1080 | sector_t block = sbh->b_blocknr; | |
1081 | int err; | |
1082 | ||
1083 | /* write back-up superblock first */ | |
1084 | sbh->b_blocknr = block ? 0 : 1; | |
1085 | mark_buffer_dirty(sbh); | |
1086 | err = sync_dirty_buffer(sbh); | |
1087 | ||
1088 | sbh->b_blocknr = block; | |
c5bda1c8 CY |
1089 | |
1090 | /* if we are in recovery path, skip writing valid superblock */ | |
1091 | if (recover || err) | |
26d815ad JK |
1092 | goto out; |
1093 | ||
1094 | /* write current valid superblock */ | |
1095 | mark_buffer_dirty(sbh); | |
1096 | err = sync_dirty_buffer(sbh); | |
1097 | out: | |
1098 | clear_buffer_write_io_error(sbh); | |
1099 | set_buffer_uptodate(sbh); | |
1100 | return err; | |
1101 | } | |
1102 | ||
aff063e2 JK |
1103 | static int f2fs_fill_super(struct super_block *sb, void *data, int silent) |
1104 | { | |
1105 | struct f2fs_sb_info *sbi; | |
da554e48 | 1106 | struct f2fs_super_block *raw_super; |
aff063e2 JK |
1107 | struct buffer_head *raw_super_buf; |
1108 | struct inode *root; | |
da554e48 | 1109 | long err; |
2adc3505 | 1110 | bool retry = true, need_fsck = false; |
dabc4a5c | 1111 | char *options = NULL; |
da554e48 | 1112 | int recovery, i; |
aff063e2 | 1113 | |
ed2e621a | 1114 | try_onemore: |
da554e48 | 1115 | err = -EINVAL; |
1116 | raw_super = NULL; | |
1117 | raw_super_buf = NULL; | |
1118 | recovery = 0; | |
1119 | ||
aff063e2 JK |
1120 | /* allocate memory for f2fs-specific super block info */ |
1121 | sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL); | |
1122 | if (!sbi) | |
1123 | return -ENOMEM; | |
1124 | ||
ff9234ad | 1125 | /* set a block size */ |
6bacf52f | 1126 | if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) { |
a07ef784 | 1127 | f2fs_msg(sb, KERN_ERR, "unable to set blocksize"); |
aff063e2 | 1128 | goto free_sbi; |
a07ef784 | 1129 | } |
aff063e2 | 1130 | |
da554e48 | 1131 | err = read_raw_super_block(sb, &raw_super, &raw_super_buf, &recovery); |
9076a75f GZ |
1132 | if (err) |
1133 | goto free_sbi; | |
1134 | ||
5fb08372 | 1135 | sb->s_fs_info = sbi; |
498c5e9f | 1136 | default_options(sbi); |
aff063e2 | 1137 | /* parse mount options */ |
dabc4a5c JK |
1138 | options = kstrdup((const char *)data, GFP_KERNEL); |
1139 | if (data && !options) { | |
1140 | err = -ENOMEM; | |
aff063e2 | 1141 | goto free_sb_buf; |
dabc4a5c JK |
1142 | } |
1143 | ||
1144 | err = parse_options(sb, options); | |
1145 | if (err) | |
1146 | goto free_options; | |
aff063e2 | 1147 | |
25ca923b | 1148 | sb->s_maxbytes = max_file_size(le32_to_cpu(raw_super->log_blocksize)); |
aff063e2 JK |
1149 | sb->s_max_links = F2FS_LINK_MAX; |
1150 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
1151 | ||
1152 | sb->s_op = &f2fs_sops; | |
1153 | sb->s_xattr = f2fs_xattr_handlers; | |
1154 | sb->s_export_op = &f2fs_export_ops; | |
1155 | sb->s_magic = F2FS_SUPER_MAGIC; | |
aff063e2 JK |
1156 | sb->s_time_gran = 1; |
1157 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
1158 | (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0); | |
1159 | memcpy(sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid)); | |
1160 | ||
1161 | /* init f2fs-specific super block info */ | |
1162 | sbi->sb = sb; | |
1163 | sbi->raw_super = raw_super; | |
1164 | sbi->raw_super_buf = raw_super_buf; | |
1165 | mutex_init(&sbi->gc_mutex); | |
5463e7c1 | 1166 | mutex_init(&sbi->writepages); |
aff063e2 | 1167 | mutex_init(&sbi->cp_mutex); |
b3582c68 | 1168 | init_rwsem(&sbi->node_write); |
caf0047e | 1169 | clear_sbi_flag(sbi, SBI_POR_DOING); |
aff063e2 | 1170 | spin_lock_init(&sbi->stat_lock); |
971767ca | 1171 | |
df0f8dc0 | 1172 | init_rwsem(&sbi->read_io.io_rwsem); |
458e6197 JK |
1173 | sbi->read_io.sbi = sbi; |
1174 | sbi->read_io.bio = NULL; | |
1175 | for (i = 0; i < NR_PAGE_TYPE; i++) { | |
df0f8dc0 | 1176 | init_rwsem(&sbi->write_io[i].io_rwsem); |
458e6197 JK |
1177 | sbi->write_io[i].sbi = sbi; |
1178 | sbi->write_io[i].bio = NULL; | |
1179 | } | |
971767ca | 1180 | |
e479556b | 1181 | init_rwsem(&sbi->cp_rwsem); |
fb51b5ef | 1182 | init_waitqueue_head(&sbi->cp_wait); |
aff063e2 JK |
1183 | init_sb_info(sbi); |
1184 | ||
1185 | /* get an inode for meta space */ | |
1186 | sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi)); | |
1187 | if (IS_ERR(sbi->meta_inode)) { | |
a07ef784 | 1188 | f2fs_msg(sb, KERN_ERR, "Failed to read F2FS meta data inode"); |
aff063e2 | 1189 | err = PTR_ERR(sbi->meta_inode); |
dabc4a5c | 1190 | goto free_options; |
aff063e2 JK |
1191 | } |
1192 | ||
1193 | err = get_valid_checkpoint(sbi); | |
a07ef784 NJ |
1194 | if (err) { |
1195 | f2fs_msg(sb, KERN_ERR, "Failed to get valid F2FS checkpoint"); | |
aff063e2 | 1196 | goto free_meta_inode; |
a07ef784 | 1197 | } |
aff063e2 JK |
1198 | |
1199 | /* sanity checking of checkpoint */ | |
1200 | err = -EINVAL; | |
577e3495 | 1201 | if (sanity_check_ckpt(sbi)) { |
a07ef784 | 1202 | f2fs_msg(sb, KERN_ERR, "Invalid F2FS checkpoint"); |
aff063e2 | 1203 | goto free_cp; |
a07ef784 | 1204 | } |
aff063e2 JK |
1205 | |
1206 | sbi->total_valid_node_count = | |
1207 | le32_to_cpu(sbi->ckpt->valid_node_count); | |
1208 | sbi->total_valid_inode_count = | |
1209 | le32_to_cpu(sbi->ckpt->valid_inode_count); | |
1210 | sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count); | |
1211 | sbi->total_valid_block_count = | |
1212 | le64_to_cpu(sbi->ckpt->valid_block_count); | |
1213 | sbi->last_valid_block_count = sbi->total_valid_block_count; | |
1214 | sbi->alloc_valid_block_count = 0; | |
1215 | INIT_LIST_HEAD(&sbi->dir_inode_list); | |
1216 | spin_lock_init(&sbi->dir_inode_lock); | |
1217 | ||
1dcc336b CY |
1218 | init_extent_cache_info(sbi); |
1219 | ||
6451e041 | 1220 | init_ino_entry_info(sbi); |
aff063e2 JK |
1221 | |
1222 | /* setup f2fs internal modules */ | |
1223 | err = build_segment_manager(sbi); | |
a07ef784 NJ |
1224 | if (err) { |
1225 | f2fs_msg(sb, KERN_ERR, | |
1226 | "Failed to initialize F2FS segment manager"); | |
aff063e2 | 1227 | goto free_sm; |
a07ef784 | 1228 | } |
aff063e2 | 1229 | err = build_node_manager(sbi); |
a07ef784 NJ |
1230 | if (err) { |
1231 | f2fs_msg(sb, KERN_ERR, | |
1232 | "Failed to initialize F2FS node manager"); | |
aff063e2 | 1233 | goto free_nm; |
a07ef784 | 1234 | } |
aff063e2 JK |
1235 | |
1236 | build_gc_manager(sbi); | |
1237 | ||
1238 | /* get an inode for node space */ | |
1239 | sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi)); | |
1240 | if (IS_ERR(sbi->node_inode)) { | |
a07ef784 | 1241 | f2fs_msg(sb, KERN_ERR, "Failed to read node inode"); |
aff063e2 JK |
1242 | err = PTR_ERR(sbi->node_inode); |
1243 | goto free_nm; | |
1244 | } | |
1245 | ||
2658e50d JK |
1246 | f2fs_join_shrinker(sbi); |
1247 | ||
aff063e2 | 1248 | /* if there are nt orphan nodes free them */ |
8f99a946 | 1249 | recover_orphan_inodes(sbi); |
aff063e2 JK |
1250 | |
1251 | /* read root inode and dentry */ | |
1252 | root = f2fs_iget(sb, F2FS_ROOT_INO(sbi)); | |
1253 | if (IS_ERR(root)) { | |
a07ef784 | 1254 | f2fs_msg(sb, KERN_ERR, "Failed to read root inode"); |
aff063e2 JK |
1255 | err = PTR_ERR(root); |
1256 | goto free_node_inode; | |
1257 | } | |
8f99a946 | 1258 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { |
9d847950 | 1259 | iput(root); |
8f99a946 | 1260 | err = -EINVAL; |
9d847950 | 1261 | goto free_node_inode; |
8f99a946 | 1262 | } |
aff063e2 JK |
1263 | |
1264 | sb->s_root = d_make_root(root); /* allocate root dentry */ | |
1265 | if (!sb->s_root) { | |
1266 | err = -ENOMEM; | |
1267 | goto free_root_inode; | |
1268 | } | |
1269 | ||
aff063e2 JK |
1270 | err = f2fs_build_stats(sbi); |
1271 | if (err) | |
6437d1b0 | 1272 | goto free_root_inode; |
aff063e2 | 1273 | |
5e176d54 JK |
1274 | if (f2fs_proc_root) |
1275 | sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root); | |
1276 | ||
1277 | if (sbi->s_proc) | |
1278 | proc_create_data("segment_info", S_IRUGO, sbi->s_proc, | |
1279 | &f2fs_seq_segment_info_fops, sb); | |
1280 | ||
b59d0bae NJ |
1281 | sbi->s_kobj.kset = f2fs_kset; |
1282 | init_completion(&sbi->s_kobj_unregister); | |
1283 | err = kobject_init_and_add(&sbi->s_kobj, &f2fs_ktype, NULL, | |
1284 | "%s", sb->s_id); | |
1285 | if (err) | |
6437d1b0 | 1286 | goto free_proc; |
b59d0bae | 1287 | |
6437d1b0 JK |
1288 | /* recover fsynced data */ |
1289 | if (!test_opt(sbi, DISABLE_ROLL_FORWARD)) { | |
081d78c2 JK |
1290 | /* |
1291 | * mount should be failed, when device has readonly mode, and | |
1292 | * previous checkpoint was not done by clean system shutdown. | |
1293 | */ | |
1294 | if (bdev_read_only(sb->s_bdev) && | |
1295 | !is_set_ckpt_flags(sbi->ckpt, CP_UMOUNT_FLAG)) { | |
1296 | err = -EROFS; | |
1297 | goto free_kobj; | |
1298 | } | |
2adc3505 CY |
1299 | |
1300 | if (need_fsck) | |
1301 | set_sbi_flag(sbi, SBI_NEED_FSCK); | |
1302 | ||
6437d1b0 | 1303 | err = recover_fsync_data(sbi); |
ed2e621a | 1304 | if (err) { |
2adc3505 | 1305 | need_fsck = true; |
6437d1b0 JK |
1306 | f2fs_msg(sb, KERN_ERR, |
1307 | "Cannot recover all fsync data errno=%ld", err); | |
ed2e621a JK |
1308 | goto free_kobj; |
1309 | } | |
6437d1b0 | 1310 | } |
b59d0bae | 1311 | |
6437d1b0 JK |
1312 | /* |
1313 | * If filesystem is not mounted as read-only then | |
1314 | * do start the gc_thread. | |
1315 | */ | |
6c029932 | 1316 | if (test_opt(sbi, BG_GC) && !f2fs_readonly(sb)) { |
6437d1b0 JK |
1317 | /* After POR, we can run background GC thread.*/ |
1318 | err = start_gc_thread(sbi); | |
1319 | if (err) | |
1320 | goto free_kobj; | |
1321 | } | |
dabc4a5c | 1322 | kfree(options); |
da554e48 | 1323 | |
1324 | /* recover broken superblock */ | |
1325 | if (recovery && !f2fs_readonly(sb) && !bdev_read_only(sb->s_bdev)) { | |
1326 | f2fs_msg(sb, KERN_INFO, "Recover invalid superblock"); | |
c5bda1c8 | 1327 | f2fs_commit_super(sbi, true); |
da554e48 | 1328 | } |
1329 | ||
aff063e2 | 1330 | return 0; |
6437d1b0 JK |
1331 | |
1332 | free_kobj: | |
1333 | kobject_del(&sbi->s_kobj); | |
1334 | free_proc: | |
1d15bd20 CY |
1335 | if (sbi->s_proc) { |
1336 | remove_proc_entry("segment_info", sbi->s_proc); | |
1337 | remove_proc_entry(sb->s_id, f2fs_proc_root); | |
1338 | } | |
1339 | f2fs_destroy_stats(sbi); | |
aff063e2 JK |
1340 | free_root_inode: |
1341 | dput(sb->s_root); | |
1342 | sb->s_root = NULL; | |
1343 | free_node_inode: | |
2658e50d JK |
1344 | mutex_lock(&sbi->umount_mutex); |
1345 | f2fs_leave_shrinker(sbi); | |
aff063e2 | 1346 | iput(sbi->node_inode); |
2658e50d | 1347 | mutex_unlock(&sbi->umount_mutex); |
aff063e2 JK |
1348 | free_nm: |
1349 | destroy_node_manager(sbi); | |
1350 | free_sm: | |
1351 | destroy_segment_manager(sbi); | |
1352 | free_cp: | |
1353 | kfree(sbi->ckpt); | |
1354 | free_meta_inode: | |
1355 | make_bad_inode(sbi->meta_inode); | |
1356 | iput(sbi->meta_inode); | |
dabc4a5c JK |
1357 | free_options: |
1358 | kfree(options); | |
aff063e2 JK |
1359 | free_sb_buf: |
1360 | brelse(raw_super_buf); | |
1361 | free_sbi: | |
1362 | kfree(sbi); | |
ed2e621a JK |
1363 | |
1364 | /* give only one another chance */ | |
1365 | if (retry) { | |
9df47ba7 | 1366 | retry = false; |
ed2e621a JK |
1367 | shrink_dcache_sb(sb); |
1368 | goto try_onemore; | |
1369 | } | |
aff063e2 JK |
1370 | return err; |
1371 | } | |
1372 | ||
1373 | static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags, | |
1374 | const char *dev_name, void *data) | |
1375 | { | |
1376 | return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super); | |
1377 | } | |
1378 | ||
30a5537f JK |
1379 | static void kill_f2fs_super(struct super_block *sb) |
1380 | { | |
1381 | if (sb->s_root) | |
caf0047e | 1382 | set_sbi_flag(F2FS_SB(sb), SBI_IS_CLOSE); |
30a5537f JK |
1383 | kill_block_super(sb); |
1384 | } | |
1385 | ||
aff063e2 JK |
1386 | static struct file_system_type f2fs_fs_type = { |
1387 | .owner = THIS_MODULE, | |
1388 | .name = "f2fs", | |
1389 | .mount = f2fs_mount, | |
30a5537f | 1390 | .kill_sb = kill_f2fs_super, |
aff063e2 JK |
1391 | .fs_flags = FS_REQUIRES_DEV, |
1392 | }; | |
7f78e035 | 1393 | MODULE_ALIAS_FS("f2fs"); |
aff063e2 | 1394 | |
6e6093a8 | 1395 | static int __init init_inodecache(void) |
aff063e2 JK |
1396 | { |
1397 | f2fs_inode_cachep = f2fs_kmem_cache_create("f2fs_inode_cache", | |
e8512d2e | 1398 | sizeof(struct f2fs_inode_info)); |
6bacf52f | 1399 | if (!f2fs_inode_cachep) |
aff063e2 JK |
1400 | return -ENOMEM; |
1401 | return 0; | |
1402 | } | |
1403 | ||
1404 | static void destroy_inodecache(void) | |
1405 | { | |
1406 | /* | |
1407 | * Make sure all delayed rcu free inodes are flushed before we | |
1408 | * destroy cache. | |
1409 | */ | |
1410 | rcu_barrier(); | |
1411 | kmem_cache_destroy(f2fs_inode_cachep); | |
1412 | } | |
1413 | ||
1414 | static int __init init_f2fs_fs(void) | |
1415 | { | |
1416 | int err; | |
1417 | ||
c0508650 JK |
1418 | f2fs_build_trace_ios(); |
1419 | ||
aff063e2 JK |
1420 | err = init_inodecache(); |
1421 | if (err) | |
1422 | goto fail; | |
1423 | err = create_node_manager_caches(); | |
1424 | if (err) | |
9890ff3f | 1425 | goto free_inodecache; |
7fd9e544 | 1426 | err = create_segment_manager_caches(); |
aff063e2 | 1427 | if (err) |
9890ff3f | 1428 | goto free_node_manager_caches; |
aff063e2 JK |
1429 | err = create_checkpoint_caches(); |
1430 | if (err) | |
06292073 | 1431 | goto free_segment_manager_caches; |
1dcc336b CY |
1432 | err = create_extent_cache(); |
1433 | if (err) | |
1434 | goto free_checkpoint_caches; | |
b59d0bae | 1435 | f2fs_kset = kset_create_and_add("f2fs", NULL, fs_kobj); |
6e6b978c WY |
1436 | if (!f2fs_kset) { |
1437 | err = -ENOMEM; | |
1dcc336b | 1438 | goto free_extent_cache; |
6e6b978c | 1439 | } |
cfc4d971 | 1440 | err = f2fs_init_crypto(); |
4589d25d | 1441 | if (err) |
9890ff3f | 1442 | goto free_kset; |
2658e50d JK |
1443 | |
1444 | err = register_shrinker(&f2fs_shrinker_info); | |
cfc4d971 JK |
1445 | if (err) |
1446 | goto free_crypto; | |
2658e50d JK |
1447 | |
1448 | err = register_filesystem(&f2fs_fs_type); | |
1449 | if (err) | |
1450 | goto free_shrinker; | |
4589d25d | 1451 | f2fs_create_root_stats(); |
5e176d54 | 1452 | f2fs_proc_root = proc_mkdir("fs/f2fs", NULL); |
9890ff3f ZH |
1453 | return 0; |
1454 | ||
2658e50d JK |
1455 | free_shrinker: |
1456 | unregister_shrinker(&f2fs_shrinker_info); | |
cfc4d971 JK |
1457 | free_crypto: |
1458 | f2fs_exit_crypto(); | |
9890ff3f ZH |
1459 | free_kset: |
1460 | kset_unregister(f2fs_kset); | |
1dcc336b CY |
1461 | free_extent_cache: |
1462 | destroy_extent_cache(); | |
9890ff3f ZH |
1463 | free_checkpoint_caches: |
1464 | destroy_checkpoint_caches(); | |
7fd9e544 JK |
1465 | free_segment_manager_caches: |
1466 | destroy_segment_manager_caches(); | |
9890ff3f ZH |
1467 | free_node_manager_caches: |
1468 | destroy_node_manager_caches(); | |
1469 | free_inodecache: | |
1470 | destroy_inodecache(); | |
aff063e2 JK |
1471 | fail: |
1472 | return err; | |
1473 | } | |
1474 | ||
1475 | static void __exit exit_f2fs_fs(void) | |
1476 | { | |
5e176d54 | 1477 | remove_proc_entry("fs/f2fs", NULL); |
4589d25d | 1478 | f2fs_destroy_root_stats(); |
2658e50d | 1479 | unregister_shrinker(&f2fs_shrinker_info); |
aff063e2 | 1480 | unregister_filesystem(&f2fs_fs_type); |
cfc4d971 | 1481 | f2fs_exit_crypto(); |
fdf6c8be | 1482 | destroy_extent_cache(); |
aff063e2 | 1483 | destroy_checkpoint_caches(); |
5dcd8a71 | 1484 | destroy_segment_manager_caches(); |
aff063e2 JK |
1485 | destroy_node_manager_caches(); |
1486 | destroy_inodecache(); | |
b59d0bae | 1487 | kset_unregister(f2fs_kset); |
351f4fba | 1488 | f2fs_destroy_trace_ios(); |
aff063e2 JK |
1489 | } |
1490 | ||
1491 | module_init(init_f2fs_fs) | |
1492 | module_exit(exit_f2fs_fs) | |
1493 | ||
1494 | MODULE_AUTHOR("Samsung Electronics's Praesto Team"); | |
1495 | MODULE_DESCRIPTION("Flash Friendly File System"); | |
1496 | MODULE_LICENSE("GPL"); |