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Commit | Line | Data |
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0a8165d7 | 1 | /* |
aff063e2 JK |
2 | * fs/f2fs/super.c |
3 | * | |
4 | * Copyright (c) 2012 Samsung Electronics Co., Ltd. | |
5 | * http://www.samsung.com/ | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | #include <linux/module.h> | |
12 | #include <linux/init.h> | |
13 | #include <linux/fs.h> | |
14 | #include <linux/statfs.h> | |
aff063e2 JK |
15 | #include <linux/buffer_head.h> |
16 | #include <linux/backing-dev.h> | |
17 | #include <linux/kthread.h> | |
18 | #include <linux/parser.h> | |
19 | #include <linux/mount.h> | |
20 | #include <linux/seq_file.h> | |
5e176d54 | 21 | #include <linux/proc_fs.h> |
aff063e2 JK |
22 | #include <linux/random.h> |
23 | #include <linux/exportfs.h> | |
d3ee456d | 24 | #include <linux/blkdev.h> |
aff063e2 | 25 | #include <linux/f2fs_fs.h> |
b59d0bae | 26 | #include <linux/sysfs.h> |
aff063e2 JK |
27 | |
28 | #include "f2fs.h" | |
29 | #include "node.h" | |
5ec4e49f | 30 | #include "segment.h" |
aff063e2 | 31 | #include "xattr.h" |
b59d0bae | 32 | #include "gc.h" |
aff063e2 | 33 | |
a2a4a7e4 NJ |
34 | #define CREATE_TRACE_POINTS |
35 | #include <trace/events/f2fs.h> | |
36 | ||
5e176d54 | 37 | static struct proc_dir_entry *f2fs_proc_root; |
aff063e2 | 38 | static struct kmem_cache *f2fs_inode_cachep; |
b59d0bae | 39 | static struct kset *f2fs_kset; |
aff063e2 JK |
40 | |
41 | enum { | |
696c018c | 42 | Opt_gc_background, |
aff063e2 JK |
43 | Opt_disable_roll_forward, |
44 | Opt_discard, | |
45 | Opt_noheap, | |
4058c511 | 46 | Opt_user_xattr, |
aff063e2 | 47 | Opt_nouser_xattr, |
4058c511 | 48 | Opt_acl, |
aff063e2 JK |
49 | Opt_noacl, |
50 | Opt_active_logs, | |
51 | Opt_disable_ext_identify, | |
444c580f | 52 | Opt_inline_xattr, |
8274de77 | 53 | Opt_inline_data, |
aff063e2 JK |
54 | Opt_err, |
55 | }; | |
56 | ||
57 | static match_table_t f2fs_tokens = { | |
696c018c | 58 | {Opt_gc_background, "background_gc=%s"}, |
aff063e2 JK |
59 | {Opt_disable_roll_forward, "disable_roll_forward"}, |
60 | {Opt_discard, "discard"}, | |
61 | {Opt_noheap, "no_heap"}, | |
4058c511 | 62 | {Opt_user_xattr, "user_xattr"}, |
aff063e2 | 63 | {Opt_nouser_xattr, "nouser_xattr"}, |
4058c511 | 64 | {Opt_acl, "acl"}, |
aff063e2 JK |
65 | {Opt_noacl, "noacl"}, |
66 | {Opt_active_logs, "active_logs=%u"}, | |
67 | {Opt_disable_ext_identify, "disable_ext_identify"}, | |
444c580f | 68 | {Opt_inline_xattr, "inline_xattr"}, |
8274de77 | 69 | {Opt_inline_data, "inline_data"}, |
aff063e2 JK |
70 | {Opt_err, NULL}, |
71 | }; | |
72 | ||
b59d0bae | 73 | /* Sysfs support for f2fs */ |
ea91e9b0 JK |
74 | enum { |
75 | GC_THREAD, /* struct f2fs_gc_thread */ | |
76 | SM_INFO, /* struct f2fs_sm_info */ | |
cdfc41c1 | 77 | NM_INFO, /* struct f2fs_nm_info */ |
b1c57c1c | 78 | F2FS_SBI, /* struct f2fs_sb_info */ |
ea91e9b0 JK |
79 | }; |
80 | ||
b59d0bae NJ |
81 | struct f2fs_attr { |
82 | struct attribute attr; | |
83 | ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *); | |
84 | ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *, | |
85 | const char *, size_t); | |
ea91e9b0 | 86 | int struct_type; |
b59d0bae NJ |
87 | int offset; |
88 | }; | |
89 | ||
ea91e9b0 JK |
90 | static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type) |
91 | { | |
92 | if (struct_type == GC_THREAD) | |
93 | return (unsigned char *)sbi->gc_thread; | |
94 | else if (struct_type == SM_INFO) | |
95 | return (unsigned char *)SM_I(sbi); | |
cdfc41c1 JK |
96 | else if (struct_type == NM_INFO) |
97 | return (unsigned char *)NM_I(sbi); | |
b1c57c1c JK |
98 | else if (struct_type == F2FS_SBI) |
99 | return (unsigned char *)sbi; | |
ea91e9b0 JK |
100 | return NULL; |
101 | } | |
102 | ||
b59d0bae NJ |
103 | static ssize_t f2fs_sbi_show(struct f2fs_attr *a, |
104 | struct f2fs_sb_info *sbi, char *buf) | |
105 | { | |
ea91e9b0 | 106 | unsigned char *ptr = NULL; |
b59d0bae NJ |
107 | unsigned int *ui; |
108 | ||
ea91e9b0 JK |
109 | ptr = __struct_ptr(sbi, a->struct_type); |
110 | if (!ptr) | |
b59d0bae NJ |
111 | return -EINVAL; |
112 | ||
ea91e9b0 | 113 | ui = (unsigned int *)(ptr + a->offset); |
b59d0bae NJ |
114 | |
115 | return snprintf(buf, PAGE_SIZE, "%u\n", *ui); | |
116 | } | |
117 | ||
118 | static ssize_t f2fs_sbi_store(struct f2fs_attr *a, | |
119 | struct f2fs_sb_info *sbi, | |
120 | const char *buf, size_t count) | |
121 | { | |
ea91e9b0 | 122 | unsigned char *ptr; |
b59d0bae NJ |
123 | unsigned long t; |
124 | unsigned int *ui; | |
125 | ssize_t ret; | |
126 | ||
ea91e9b0 JK |
127 | ptr = __struct_ptr(sbi, a->struct_type); |
128 | if (!ptr) | |
b59d0bae NJ |
129 | return -EINVAL; |
130 | ||
ea91e9b0 | 131 | ui = (unsigned int *)(ptr + a->offset); |
b59d0bae NJ |
132 | |
133 | ret = kstrtoul(skip_spaces(buf), 0, &t); | |
134 | if (ret < 0) | |
135 | return ret; | |
136 | *ui = t; | |
137 | return count; | |
138 | } | |
139 | ||
140 | static ssize_t f2fs_attr_show(struct kobject *kobj, | |
141 | struct attribute *attr, char *buf) | |
142 | { | |
143 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, | |
144 | s_kobj); | |
145 | struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); | |
146 | ||
147 | return a->show ? a->show(a, sbi, buf) : 0; | |
148 | } | |
149 | ||
150 | static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr, | |
151 | const char *buf, size_t len) | |
152 | { | |
153 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, | |
154 | s_kobj); | |
155 | struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); | |
156 | ||
157 | return a->store ? a->store(a, sbi, buf, len) : 0; | |
158 | } | |
159 | ||
160 | static void f2fs_sb_release(struct kobject *kobj) | |
161 | { | |
162 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, | |
163 | s_kobj); | |
164 | complete(&sbi->s_kobj_unregister); | |
165 | } | |
166 | ||
ea91e9b0 | 167 | #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \ |
b59d0bae NJ |
168 | static struct f2fs_attr f2fs_attr_##_name = { \ |
169 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
170 | .show = _show, \ | |
171 | .store = _store, \ | |
ea91e9b0 JK |
172 | .struct_type = _struct_type, \ |
173 | .offset = _offset \ | |
b59d0bae NJ |
174 | } |
175 | ||
ea91e9b0 JK |
176 | #define F2FS_RW_ATTR(struct_type, struct_name, name, elname) \ |
177 | F2FS_ATTR_OFFSET(struct_type, name, 0644, \ | |
178 | f2fs_sbi_show, f2fs_sbi_store, \ | |
179 | offsetof(struct struct_name, elname)) | |
b59d0bae | 180 | |
ea91e9b0 JK |
181 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time); |
182 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time); | |
183 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time); | |
184 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_idle, gc_idle); | |
185 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments); | |
7ac8c3b0 | 186 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, max_small_discards, max_discards); |
216fbd64 JK |
187 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy); |
188 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util); | |
cdfc41c1 | 189 | F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh); |
b1c57c1c | 190 | F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search); |
ab9fa662 | 191 | F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level); |
b59d0bae NJ |
192 | |
193 | #define ATTR_LIST(name) (&f2fs_attr_##name.attr) | |
194 | static struct attribute *f2fs_attrs[] = { | |
195 | ATTR_LIST(gc_min_sleep_time), | |
196 | ATTR_LIST(gc_max_sleep_time), | |
197 | ATTR_LIST(gc_no_gc_sleep_time), | |
d2dc095f | 198 | ATTR_LIST(gc_idle), |
ea91e9b0 | 199 | ATTR_LIST(reclaim_segments), |
7ac8c3b0 | 200 | ATTR_LIST(max_small_discards), |
216fbd64 JK |
201 | ATTR_LIST(ipu_policy), |
202 | ATTR_LIST(min_ipu_util), | |
b1c57c1c | 203 | ATTR_LIST(max_victim_search), |
ab9fa662 | 204 | ATTR_LIST(dir_level), |
cdfc41c1 | 205 | ATTR_LIST(ram_thresh), |
b59d0bae NJ |
206 | NULL, |
207 | }; | |
208 | ||
209 | static const struct sysfs_ops f2fs_attr_ops = { | |
210 | .show = f2fs_attr_show, | |
211 | .store = f2fs_attr_store, | |
212 | }; | |
213 | ||
214 | static struct kobj_type f2fs_ktype = { | |
215 | .default_attrs = f2fs_attrs, | |
216 | .sysfs_ops = &f2fs_attr_ops, | |
217 | .release = f2fs_sb_release, | |
218 | }; | |
219 | ||
a07ef784 NJ |
220 | void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...) |
221 | { | |
222 | struct va_format vaf; | |
223 | va_list args; | |
224 | ||
225 | va_start(args, fmt); | |
226 | vaf.fmt = fmt; | |
227 | vaf.va = &args; | |
228 | printk("%sF2FS-fs (%s): %pV\n", level, sb->s_id, &vaf); | |
229 | va_end(args); | |
230 | } | |
231 | ||
aff063e2 JK |
232 | static void init_once(void *foo) |
233 | { | |
234 | struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo; | |
235 | ||
aff063e2 JK |
236 | inode_init_once(&fi->vfs_inode); |
237 | } | |
238 | ||
696c018c NJ |
239 | static int parse_options(struct super_block *sb, char *options) |
240 | { | |
241 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
242 | substring_t args[MAX_OPT_ARGS]; | |
243 | char *p, *name; | |
244 | int arg = 0; | |
245 | ||
246 | if (!options) | |
247 | return 0; | |
248 | ||
249 | while ((p = strsep(&options, ",")) != NULL) { | |
250 | int token; | |
251 | if (!*p) | |
252 | continue; | |
253 | /* | |
254 | * Initialize args struct so we know whether arg was | |
255 | * found; some options take optional arguments. | |
256 | */ | |
257 | args[0].to = args[0].from = NULL; | |
258 | token = match_token(p, f2fs_tokens, args); | |
259 | ||
260 | switch (token) { | |
261 | case Opt_gc_background: | |
262 | name = match_strdup(&args[0]); | |
263 | ||
264 | if (!name) | |
265 | return -ENOMEM; | |
04c09388 | 266 | if (strlen(name) == 2 && !strncmp(name, "on", 2)) |
696c018c | 267 | set_opt(sbi, BG_GC); |
04c09388 | 268 | else if (strlen(name) == 3 && !strncmp(name, "off", 3)) |
696c018c NJ |
269 | clear_opt(sbi, BG_GC); |
270 | else { | |
271 | kfree(name); | |
272 | return -EINVAL; | |
273 | } | |
274 | kfree(name); | |
275 | break; | |
276 | case Opt_disable_roll_forward: | |
277 | set_opt(sbi, DISABLE_ROLL_FORWARD); | |
278 | break; | |
279 | case Opt_discard: | |
280 | set_opt(sbi, DISCARD); | |
281 | break; | |
282 | case Opt_noheap: | |
283 | set_opt(sbi, NOHEAP); | |
284 | break; | |
285 | #ifdef CONFIG_F2FS_FS_XATTR | |
4058c511 KA |
286 | case Opt_user_xattr: |
287 | set_opt(sbi, XATTR_USER); | |
288 | break; | |
696c018c NJ |
289 | case Opt_nouser_xattr: |
290 | clear_opt(sbi, XATTR_USER); | |
291 | break; | |
444c580f JK |
292 | case Opt_inline_xattr: |
293 | set_opt(sbi, INLINE_XATTR); | |
294 | break; | |
696c018c | 295 | #else |
4058c511 KA |
296 | case Opt_user_xattr: |
297 | f2fs_msg(sb, KERN_INFO, | |
298 | "user_xattr options not supported"); | |
299 | break; | |
696c018c NJ |
300 | case Opt_nouser_xattr: |
301 | f2fs_msg(sb, KERN_INFO, | |
302 | "nouser_xattr options not supported"); | |
303 | break; | |
444c580f JK |
304 | case Opt_inline_xattr: |
305 | f2fs_msg(sb, KERN_INFO, | |
306 | "inline_xattr options not supported"); | |
307 | break; | |
696c018c NJ |
308 | #endif |
309 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
4058c511 KA |
310 | case Opt_acl: |
311 | set_opt(sbi, POSIX_ACL); | |
312 | break; | |
696c018c NJ |
313 | case Opt_noacl: |
314 | clear_opt(sbi, POSIX_ACL); | |
315 | break; | |
316 | #else | |
4058c511 KA |
317 | case Opt_acl: |
318 | f2fs_msg(sb, KERN_INFO, "acl options not supported"); | |
319 | break; | |
696c018c NJ |
320 | case Opt_noacl: |
321 | f2fs_msg(sb, KERN_INFO, "noacl options not supported"); | |
322 | break; | |
323 | #endif | |
324 | case Opt_active_logs: | |
325 | if (args->from && match_int(args, &arg)) | |
326 | return -EINVAL; | |
327 | if (arg != 2 && arg != 4 && arg != NR_CURSEG_TYPE) | |
328 | return -EINVAL; | |
329 | sbi->active_logs = arg; | |
330 | break; | |
331 | case Opt_disable_ext_identify: | |
332 | set_opt(sbi, DISABLE_EXT_IDENTIFY); | |
333 | break; | |
8274de77 HL |
334 | case Opt_inline_data: |
335 | set_opt(sbi, INLINE_DATA); | |
336 | break; | |
696c018c NJ |
337 | default: |
338 | f2fs_msg(sb, KERN_ERR, | |
339 | "Unrecognized mount option \"%s\" or missing value", | |
340 | p); | |
341 | return -EINVAL; | |
342 | } | |
343 | } | |
344 | return 0; | |
345 | } | |
346 | ||
aff063e2 JK |
347 | static struct inode *f2fs_alloc_inode(struct super_block *sb) |
348 | { | |
349 | struct f2fs_inode_info *fi; | |
350 | ||
a0acdfe0 | 351 | fi = kmem_cache_alloc(f2fs_inode_cachep, GFP_F2FS_ZERO); |
aff063e2 JK |
352 | if (!fi) |
353 | return NULL; | |
354 | ||
355 | init_once((void *) fi); | |
356 | ||
434720fa | 357 | /* Initialize f2fs-specific inode info */ |
aff063e2 JK |
358 | fi->vfs_inode.i_version = 1; |
359 | atomic_set(&fi->dirty_dents, 0); | |
360 | fi->i_current_depth = 1; | |
361 | fi->i_advise = 0; | |
362 | rwlock_init(&fi->ext.ext_lock); | |
d928bfbf | 363 | init_rwsem(&fi->i_sem); |
aff063e2 JK |
364 | |
365 | set_inode_flag(fi, FI_NEW_INODE); | |
366 | ||
444c580f JK |
367 | if (test_opt(F2FS_SB(sb), INLINE_XATTR)) |
368 | set_inode_flag(fi, FI_INLINE_XATTR); | |
369 | ||
ab9fa662 JK |
370 | /* Will be used by directory only */ |
371 | fi->i_dir_level = F2FS_SB(sb)->dir_level; | |
372 | ||
aff063e2 JK |
373 | return &fi->vfs_inode; |
374 | } | |
375 | ||
531ad7d5 JK |
376 | static int f2fs_drop_inode(struct inode *inode) |
377 | { | |
378 | /* | |
379 | * This is to avoid a deadlock condition like below. | |
380 | * writeback_single_inode(inode) | |
381 | * - f2fs_write_data_page | |
382 | * - f2fs_gc -> iput -> evict | |
383 | * - inode_wait_for_writeback(inode) | |
384 | */ | |
385 | if (!inode_unhashed(inode) && inode->i_state & I_SYNC) | |
386 | return 0; | |
387 | return generic_drop_inode(inode); | |
388 | } | |
389 | ||
b3783873 JK |
390 | /* |
391 | * f2fs_dirty_inode() is called from __mark_inode_dirty() | |
392 | * | |
393 | * We should call set_dirty_inode to write the dirty inode through write_inode. | |
394 | */ | |
395 | static void f2fs_dirty_inode(struct inode *inode, int flags) | |
396 | { | |
397 | set_inode_flag(F2FS_I(inode), FI_DIRTY_INODE); | |
b3783873 JK |
398 | } |
399 | ||
aff063e2 JK |
400 | static void f2fs_i_callback(struct rcu_head *head) |
401 | { | |
402 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
403 | kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode)); | |
404 | } | |
405 | ||
25ca923b | 406 | static void f2fs_destroy_inode(struct inode *inode) |
aff063e2 JK |
407 | { |
408 | call_rcu(&inode->i_rcu, f2fs_i_callback); | |
409 | } | |
410 | ||
411 | static void f2fs_put_super(struct super_block *sb) | |
412 | { | |
413 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
414 | ||
5e176d54 JK |
415 | if (sbi->s_proc) { |
416 | remove_proc_entry("segment_info", sbi->s_proc); | |
417 | remove_proc_entry(sb->s_id, f2fs_proc_root); | |
418 | } | |
b59d0bae | 419 | kobject_del(&sbi->s_kobj); |
5e176d54 | 420 | |
aff063e2 JK |
421 | f2fs_destroy_stats(sbi); |
422 | stop_gc_thread(sbi); | |
423 | ||
5887d291 JK |
424 | /* We don't need to do checkpoint when it's clean */ |
425 | if (sbi->s_dirty && get_pages(sbi, F2FS_DIRTY_NODES)) | |
426 | write_checkpoint(sbi, true); | |
aff063e2 JK |
427 | |
428 | iput(sbi->node_inode); | |
429 | iput(sbi->meta_inode); | |
430 | ||
431 | /* destroy f2fs internal modules */ | |
432 | destroy_node_manager(sbi); | |
433 | destroy_segment_manager(sbi); | |
434 | ||
435 | kfree(sbi->ckpt); | |
b59d0bae NJ |
436 | kobject_put(&sbi->s_kobj); |
437 | wait_for_completion(&sbi->s_kobj_unregister); | |
aff063e2 JK |
438 | |
439 | sb->s_fs_info = NULL; | |
440 | brelse(sbi->raw_super_buf); | |
441 | kfree(sbi); | |
442 | } | |
443 | ||
444 | int f2fs_sync_fs(struct super_block *sb, int sync) | |
445 | { | |
446 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
aff063e2 | 447 | |
a2a4a7e4 NJ |
448 | trace_f2fs_sync_fs(sb, sync); |
449 | ||
aff063e2 JK |
450 | if (!sbi->s_dirty && !get_pages(sbi, F2FS_DIRTY_NODES)) |
451 | return 0; | |
452 | ||
b7473754 JK |
453 | if (sync) { |
454 | mutex_lock(&sbi->gc_mutex); | |
43727527 | 455 | write_checkpoint(sbi, false); |
b7473754 JK |
456 | mutex_unlock(&sbi->gc_mutex); |
457 | } else { | |
7d82db83 | 458 | f2fs_balance_fs(sbi); |
b7473754 | 459 | } |
aff063e2 | 460 | |
64c576fe | 461 | return 0; |
aff063e2 JK |
462 | } |
463 | ||
d6212a5f CL |
464 | static int f2fs_freeze(struct super_block *sb) |
465 | { | |
466 | int err; | |
467 | ||
77888c1e | 468 | if (f2fs_readonly(sb)) |
d6212a5f CL |
469 | return 0; |
470 | ||
471 | err = f2fs_sync_fs(sb, 1); | |
472 | return err; | |
473 | } | |
474 | ||
475 | static int f2fs_unfreeze(struct super_block *sb) | |
476 | { | |
477 | return 0; | |
478 | } | |
479 | ||
aff063e2 JK |
480 | static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf) |
481 | { | |
482 | struct super_block *sb = dentry->d_sb; | |
483 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
484 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); | |
485 | block_t total_count, user_block_count, start_count, ovp_count; | |
486 | ||
487 | total_count = le64_to_cpu(sbi->raw_super->block_count); | |
488 | user_block_count = sbi->user_block_count; | |
489 | start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr); | |
490 | ovp_count = SM_I(sbi)->ovp_segments << sbi->log_blocks_per_seg; | |
491 | buf->f_type = F2FS_SUPER_MAGIC; | |
492 | buf->f_bsize = sbi->blocksize; | |
493 | ||
494 | buf->f_blocks = total_count - start_count; | |
495 | buf->f_bfree = buf->f_blocks - valid_user_blocks(sbi) - ovp_count; | |
496 | buf->f_bavail = user_block_count - valid_user_blocks(sbi); | |
497 | ||
1362b5e3 JK |
498 | buf->f_files = sbi->total_node_count; |
499 | buf->f_ffree = sbi->total_node_count - valid_inode_count(sbi); | |
aff063e2 | 500 | |
5a20d339 | 501 | buf->f_namelen = F2FS_NAME_LEN; |
aff063e2 JK |
502 | buf->f_fsid.val[0] = (u32)id; |
503 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
504 | ||
505 | return 0; | |
506 | } | |
507 | ||
508 | static int f2fs_show_options(struct seq_file *seq, struct dentry *root) | |
509 | { | |
510 | struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb); | |
511 | ||
696c018c NJ |
512 | if (!(root->d_sb->s_flags & MS_RDONLY) && test_opt(sbi, BG_GC)) |
513 | seq_printf(seq, ",background_gc=%s", "on"); | |
aff063e2 | 514 | else |
696c018c | 515 | seq_printf(seq, ",background_gc=%s", "off"); |
aff063e2 JK |
516 | if (test_opt(sbi, DISABLE_ROLL_FORWARD)) |
517 | seq_puts(seq, ",disable_roll_forward"); | |
518 | if (test_opt(sbi, DISCARD)) | |
519 | seq_puts(seq, ",discard"); | |
520 | if (test_opt(sbi, NOHEAP)) | |
521 | seq_puts(seq, ",no_heap_alloc"); | |
522 | #ifdef CONFIG_F2FS_FS_XATTR | |
523 | if (test_opt(sbi, XATTR_USER)) | |
524 | seq_puts(seq, ",user_xattr"); | |
525 | else | |
526 | seq_puts(seq, ",nouser_xattr"); | |
444c580f JK |
527 | if (test_opt(sbi, INLINE_XATTR)) |
528 | seq_puts(seq, ",inline_xattr"); | |
aff063e2 JK |
529 | #endif |
530 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
531 | if (test_opt(sbi, POSIX_ACL)) | |
532 | seq_puts(seq, ",acl"); | |
533 | else | |
534 | seq_puts(seq, ",noacl"); | |
535 | #endif | |
536 | if (test_opt(sbi, DISABLE_EXT_IDENTIFY)) | |
aa43507f | 537 | seq_puts(seq, ",disable_ext_identify"); |
8274de77 HL |
538 | if (test_opt(sbi, INLINE_DATA)) |
539 | seq_puts(seq, ",inline_data"); | |
aff063e2 JK |
540 | seq_printf(seq, ",active_logs=%u", sbi->active_logs); |
541 | ||
542 | return 0; | |
543 | } | |
544 | ||
5e176d54 JK |
545 | static int segment_info_seq_show(struct seq_file *seq, void *offset) |
546 | { | |
547 | struct super_block *sb = seq->private; | |
548 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
6c311ec6 CF |
549 | unsigned int total_segs = |
550 | le32_to_cpu(sbi->raw_super->segment_count_main); | |
5e176d54 JK |
551 | int i; |
552 | ||
90aa6dc9 CY |
553 | seq_puts(seq, "format: segment_type|valid_blocks\n" |
554 | "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n"); | |
555 | ||
5e176d54 | 556 | for (i = 0; i < total_segs; i++) { |
90aa6dc9 CY |
557 | struct seg_entry *se = get_seg_entry(sbi, i); |
558 | ||
559 | if ((i % 10) == 0) | |
560 | seq_printf(seq, "%-5d", i); | |
561 | seq_printf(seq, "%d|%-3u", se->type, | |
562 | get_valid_blocks(sbi, i, 1)); | |
46c04366 GZ |
563 | if ((i % 10) == 9 || i == (total_segs - 1)) |
564 | seq_putc(seq, '\n'); | |
5e176d54 | 565 | else |
46c04366 | 566 | seq_putc(seq, ' '); |
5e176d54 | 567 | } |
46c04366 | 568 | |
5e176d54 JK |
569 | return 0; |
570 | } | |
571 | ||
572 | static int segment_info_open_fs(struct inode *inode, struct file *file) | |
573 | { | |
574 | return single_open(file, segment_info_seq_show, PDE_DATA(inode)); | |
575 | } | |
576 | ||
577 | static const struct file_operations f2fs_seq_segment_info_fops = { | |
578 | .owner = THIS_MODULE, | |
579 | .open = segment_info_open_fs, | |
580 | .read = seq_read, | |
581 | .llseek = seq_lseek, | |
582 | .release = single_release, | |
583 | }; | |
584 | ||
696c018c NJ |
585 | static int f2fs_remount(struct super_block *sb, int *flags, char *data) |
586 | { | |
587 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
588 | struct f2fs_mount_info org_mount_opt; | |
589 | int err, active_logs; | |
590 | ||
591 | /* | |
592 | * Save the old mount options in case we | |
593 | * need to restore them. | |
594 | */ | |
595 | org_mount_opt = sbi->mount_opt; | |
596 | active_logs = sbi->active_logs; | |
597 | ||
598 | /* parse mount options */ | |
599 | err = parse_options(sb, data); | |
600 | if (err) | |
601 | goto restore_opts; | |
602 | ||
603 | /* | |
604 | * Previous and new state of filesystem is RO, | |
605 | * so no point in checking GC conditions. | |
606 | */ | |
607 | if ((sb->s_flags & MS_RDONLY) && (*flags & MS_RDONLY)) | |
608 | goto skip; | |
609 | ||
610 | /* | |
611 | * We stop the GC thread if FS is mounted as RO | |
612 | * or if background_gc = off is passed in mount | |
613 | * option. Also sync the filesystem. | |
614 | */ | |
615 | if ((*flags & MS_RDONLY) || !test_opt(sbi, BG_GC)) { | |
616 | if (sbi->gc_thread) { | |
617 | stop_gc_thread(sbi); | |
618 | f2fs_sync_fs(sb, 1); | |
619 | } | |
620 | } else if (test_opt(sbi, BG_GC) && !sbi->gc_thread) { | |
621 | err = start_gc_thread(sbi); | |
622 | if (err) | |
623 | goto restore_opts; | |
624 | } | |
625 | skip: | |
626 | /* Update the POSIXACL Flag */ | |
627 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
628 | (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0); | |
629 | return 0; | |
630 | ||
631 | restore_opts: | |
632 | sbi->mount_opt = org_mount_opt; | |
633 | sbi->active_logs = active_logs; | |
634 | return err; | |
635 | } | |
636 | ||
aff063e2 JK |
637 | static struct super_operations f2fs_sops = { |
638 | .alloc_inode = f2fs_alloc_inode, | |
531ad7d5 | 639 | .drop_inode = f2fs_drop_inode, |
aff063e2 JK |
640 | .destroy_inode = f2fs_destroy_inode, |
641 | .write_inode = f2fs_write_inode, | |
b3783873 | 642 | .dirty_inode = f2fs_dirty_inode, |
aff063e2 JK |
643 | .show_options = f2fs_show_options, |
644 | .evict_inode = f2fs_evict_inode, | |
645 | .put_super = f2fs_put_super, | |
646 | .sync_fs = f2fs_sync_fs, | |
d6212a5f CL |
647 | .freeze_fs = f2fs_freeze, |
648 | .unfreeze_fs = f2fs_unfreeze, | |
aff063e2 | 649 | .statfs = f2fs_statfs, |
696c018c | 650 | .remount_fs = f2fs_remount, |
aff063e2 JK |
651 | }; |
652 | ||
653 | static struct inode *f2fs_nfs_get_inode(struct super_block *sb, | |
654 | u64 ino, u32 generation) | |
655 | { | |
656 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
657 | struct inode *inode; | |
658 | ||
6bacf52f | 659 | if (unlikely(ino < F2FS_ROOT_INO(sbi))) |
aff063e2 | 660 | return ERR_PTR(-ESTALE); |
910bb12d CY |
661 | if (unlikely(ino >= NM_I(sbi)->max_nid)) |
662 | return ERR_PTR(-ESTALE); | |
aff063e2 JK |
663 | |
664 | /* | |
665 | * f2fs_iget isn't quite right if the inode is currently unallocated! | |
666 | * However f2fs_iget currently does appropriate checks to handle stale | |
667 | * inodes so everything is OK. | |
668 | */ | |
669 | inode = f2fs_iget(sb, ino); | |
670 | if (IS_ERR(inode)) | |
671 | return ERR_CAST(inode); | |
6bacf52f | 672 | if (unlikely(generation && inode->i_generation != generation)) { |
aff063e2 JK |
673 | /* we didn't find the right inode.. */ |
674 | iput(inode); | |
675 | return ERR_PTR(-ESTALE); | |
676 | } | |
677 | return inode; | |
678 | } | |
679 | ||
680 | static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
681 | int fh_len, int fh_type) | |
682 | { | |
683 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
684 | f2fs_nfs_get_inode); | |
685 | } | |
686 | ||
687 | static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid, | |
688 | int fh_len, int fh_type) | |
689 | { | |
690 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
691 | f2fs_nfs_get_inode); | |
692 | } | |
693 | ||
694 | static const struct export_operations f2fs_export_ops = { | |
695 | .fh_to_dentry = f2fs_fh_to_dentry, | |
696 | .fh_to_parent = f2fs_fh_to_parent, | |
697 | .get_parent = f2fs_get_parent, | |
698 | }; | |
699 | ||
aff063e2 JK |
700 | static loff_t max_file_size(unsigned bits) |
701 | { | |
de93653f | 702 | loff_t result = (DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS); |
aff063e2 JK |
703 | loff_t leaf_count = ADDRS_PER_BLOCK; |
704 | ||
705 | /* two direct node blocks */ | |
706 | result += (leaf_count * 2); | |
707 | ||
708 | /* two indirect node blocks */ | |
709 | leaf_count *= NIDS_PER_BLOCK; | |
710 | result += (leaf_count * 2); | |
711 | ||
712 | /* one double indirect node block */ | |
713 | leaf_count *= NIDS_PER_BLOCK; | |
714 | result += leaf_count; | |
715 | ||
716 | result <<= bits; | |
717 | return result; | |
718 | } | |
719 | ||
a07ef784 NJ |
720 | static int sanity_check_raw_super(struct super_block *sb, |
721 | struct f2fs_super_block *raw_super) | |
aff063e2 JK |
722 | { |
723 | unsigned int blocksize; | |
724 | ||
a07ef784 NJ |
725 | if (F2FS_SUPER_MAGIC != le32_to_cpu(raw_super->magic)) { |
726 | f2fs_msg(sb, KERN_INFO, | |
727 | "Magic Mismatch, valid(0x%x) - read(0x%x)", | |
728 | F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic)); | |
aff063e2 | 729 | return 1; |
a07ef784 | 730 | } |
aff063e2 | 731 | |
5c9b4692 | 732 | /* Currently, support only 4KB page cache size */ |
733 | if (F2FS_BLKSIZE != PAGE_CACHE_SIZE) { | |
734 | f2fs_msg(sb, KERN_INFO, | |
14d7e9de | 735 | "Invalid page_cache_size (%lu), supports only 4KB\n", |
5c9b4692 | 736 | PAGE_CACHE_SIZE); |
737 | return 1; | |
738 | } | |
739 | ||
aff063e2 JK |
740 | /* Currently, support only 4KB block size */ |
741 | blocksize = 1 << le32_to_cpu(raw_super->log_blocksize); | |
5c9b4692 | 742 | if (blocksize != F2FS_BLKSIZE) { |
a07ef784 NJ |
743 | f2fs_msg(sb, KERN_INFO, |
744 | "Invalid blocksize (%u), supports only 4KB\n", | |
745 | blocksize); | |
aff063e2 | 746 | return 1; |
a07ef784 | 747 | } |
5c9b4692 | 748 | |
aff063e2 | 749 | if (le32_to_cpu(raw_super->log_sectorsize) != |
a07ef784 NJ |
750 | F2FS_LOG_SECTOR_SIZE) { |
751 | f2fs_msg(sb, KERN_INFO, "Invalid log sectorsize"); | |
aff063e2 | 752 | return 1; |
a07ef784 | 753 | } |
aff063e2 | 754 | if (le32_to_cpu(raw_super->log_sectors_per_block) != |
a07ef784 NJ |
755 | F2FS_LOG_SECTORS_PER_BLOCK) { |
756 | f2fs_msg(sb, KERN_INFO, "Invalid log sectors per block"); | |
aff063e2 | 757 | return 1; |
a07ef784 | 758 | } |
aff063e2 JK |
759 | return 0; |
760 | } | |
761 | ||
577e3495 | 762 | static int sanity_check_ckpt(struct f2fs_sb_info *sbi) |
aff063e2 JK |
763 | { |
764 | unsigned int total, fsmeta; | |
577e3495 JK |
765 | struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); |
766 | struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); | |
aff063e2 JK |
767 | |
768 | total = le32_to_cpu(raw_super->segment_count); | |
769 | fsmeta = le32_to_cpu(raw_super->segment_count_ckpt); | |
770 | fsmeta += le32_to_cpu(raw_super->segment_count_sit); | |
771 | fsmeta += le32_to_cpu(raw_super->segment_count_nat); | |
772 | fsmeta += le32_to_cpu(ckpt->rsvd_segment_count); | |
773 | fsmeta += le32_to_cpu(raw_super->segment_count_ssa); | |
774 | ||
6bacf52f | 775 | if (unlikely(fsmeta >= total)) |
aff063e2 | 776 | return 1; |
577e3495 | 777 | |
6bacf52f | 778 | if (unlikely(is_set_ckpt_flags(ckpt, CP_ERROR_FLAG))) { |
577e3495 JK |
779 | f2fs_msg(sbi->sb, KERN_ERR, "A bug case: need to run fsck"); |
780 | return 1; | |
781 | } | |
aff063e2 JK |
782 | return 0; |
783 | } | |
784 | ||
785 | static void init_sb_info(struct f2fs_sb_info *sbi) | |
786 | { | |
787 | struct f2fs_super_block *raw_super = sbi->raw_super; | |
788 | int i; | |
789 | ||
790 | sbi->log_sectors_per_block = | |
791 | le32_to_cpu(raw_super->log_sectors_per_block); | |
792 | sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize); | |
793 | sbi->blocksize = 1 << sbi->log_blocksize; | |
794 | sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg); | |
795 | sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg; | |
796 | sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec); | |
797 | sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone); | |
798 | sbi->total_sections = le32_to_cpu(raw_super->section_count); | |
799 | sbi->total_node_count = | |
800 | (le32_to_cpu(raw_super->segment_count_nat) / 2) | |
801 | * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK; | |
802 | sbi->root_ino_num = le32_to_cpu(raw_super->root_ino); | |
803 | sbi->node_ino_num = le32_to_cpu(raw_super->node_ino); | |
804 | sbi->meta_ino_num = le32_to_cpu(raw_super->meta_ino); | |
5ec4e49f | 805 | sbi->cur_victim_sec = NULL_SECNO; |
b1c57c1c | 806 | sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH; |
aff063e2 JK |
807 | |
808 | for (i = 0; i < NR_COUNT_TYPE; i++) | |
809 | atomic_set(&sbi->nr_pages[i], 0); | |
ab9fa662 JK |
810 | |
811 | sbi->dir_level = DEF_DIR_LEVEL; | |
aff063e2 JK |
812 | } |
813 | ||
9076a75f GZ |
814 | /* |
815 | * Read f2fs raw super block. | |
816 | * Because we have two copies of super block, so read the first one at first, | |
817 | * if the first one is invalid, move to read the second one. | |
818 | */ | |
819 | static int read_raw_super_block(struct super_block *sb, | |
820 | struct f2fs_super_block **raw_super, | |
821 | struct buffer_head **raw_super_buf) | |
14d7e9de | 822 | { |
9076a75f | 823 | int block = 0; |
14d7e9de | 824 | |
9076a75f | 825 | retry: |
14d7e9de | 826 | *raw_super_buf = sb_bread(sb, block); |
827 | if (!*raw_super_buf) { | |
9076a75f GZ |
828 | f2fs_msg(sb, KERN_ERR, "Unable to read %dth superblock", |
829 | block + 1); | |
830 | if (block == 0) { | |
831 | block++; | |
832 | goto retry; | |
833 | } else { | |
834 | return -EIO; | |
835 | } | |
14d7e9de | 836 | } |
837 | ||
838 | *raw_super = (struct f2fs_super_block *) | |
839 | ((char *)(*raw_super_buf)->b_data + F2FS_SUPER_OFFSET); | |
840 | ||
841 | /* sanity checking of raw super */ | |
9076a75f GZ |
842 | if (sanity_check_raw_super(sb, *raw_super)) { |
843 | brelse(*raw_super_buf); | |
6c311ec6 CF |
844 | f2fs_msg(sb, KERN_ERR, |
845 | "Can't find valid F2FS filesystem in %dth superblock", | |
846 | block + 1); | |
6bacf52f | 847 | if (block == 0) { |
9076a75f GZ |
848 | block++; |
849 | goto retry; | |
850 | } else { | |
851 | return -EINVAL; | |
852 | } | |
853 | } | |
14d7e9de | 854 | |
9076a75f | 855 | return 0; |
14d7e9de | 856 | } |
857 | ||
aff063e2 JK |
858 | static int f2fs_fill_super(struct super_block *sb, void *data, int silent) |
859 | { | |
860 | struct f2fs_sb_info *sbi; | |
861 | struct f2fs_super_block *raw_super; | |
862 | struct buffer_head *raw_super_buf; | |
863 | struct inode *root; | |
864 | long err = -EINVAL; | |
971767ca | 865 | int i; |
aff063e2 JK |
866 | |
867 | /* allocate memory for f2fs-specific super block info */ | |
868 | sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL); | |
869 | if (!sbi) | |
870 | return -ENOMEM; | |
871 | ||
ff9234ad | 872 | /* set a block size */ |
6bacf52f | 873 | if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) { |
a07ef784 | 874 | f2fs_msg(sb, KERN_ERR, "unable to set blocksize"); |
aff063e2 | 875 | goto free_sbi; |
a07ef784 | 876 | } |
aff063e2 | 877 | |
9076a75f GZ |
878 | err = read_raw_super_block(sb, &raw_super, &raw_super_buf); |
879 | if (err) | |
880 | goto free_sbi; | |
881 | ||
5fb08372 | 882 | sb->s_fs_info = sbi; |
aff063e2 JK |
883 | /* init some FS parameters */ |
884 | sbi->active_logs = NR_CURSEG_TYPE; | |
885 | ||
886 | set_opt(sbi, BG_GC); | |
887 | ||
888 | #ifdef CONFIG_F2FS_FS_XATTR | |
889 | set_opt(sbi, XATTR_USER); | |
890 | #endif | |
891 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
892 | set_opt(sbi, POSIX_ACL); | |
893 | #endif | |
894 | /* parse mount options */ | |
5fb08372 | 895 | err = parse_options(sb, (char *)data); |
66348b72 | 896 | if (err) |
aff063e2 JK |
897 | goto free_sb_buf; |
898 | ||
25ca923b | 899 | sb->s_maxbytes = max_file_size(le32_to_cpu(raw_super->log_blocksize)); |
aff063e2 JK |
900 | sb->s_max_links = F2FS_LINK_MAX; |
901 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
902 | ||
903 | sb->s_op = &f2fs_sops; | |
904 | sb->s_xattr = f2fs_xattr_handlers; | |
905 | sb->s_export_op = &f2fs_export_ops; | |
906 | sb->s_magic = F2FS_SUPER_MAGIC; | |
aff063e2 JK |
907 | sb->s_time_gran = 1; |
908 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
909 | (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0); | |
910 | memcpy(sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid)); | |
911 | ||
912 | /* init f2fs-specific super block info */ | |
913 | sbi->sb = sb; | |
914 | sbi->raw_super = raw_super; | |
915 | sbi->raw_super_buf = raw_super_buf; | |
916 | mutex_init(&sbi->gc_mutex); | |
aff063e2 JK |
917 | mutex_init(&sbi->writepages); |
918 | mutex_init(&sbi->cp_mutex); | |
39936837 | 919 | mutex_init(&sbi->node_write); |
aabe5136 | 920 | sbi->por_doing = false; |
aff063e2 | 921 | spin_lock_init(&sbi->stat_lock); |
971767ca | 922 | |
df0f8dc0 | 923 | init_rwsem(&sbi->read_io.io_rwsem); |
458e6197 JK |
924 | sbi->read_io.sbi = sbi; |
925 | sbi->read_io.bio = NULL; | |
926 | for (i = 0; i < NR_PAGE_TYPE; i++) { | |
df0f8dc0 | 927 | init_rwsem(&sbi->write_io[i].io_rwsem); |
458e6197 JK |
928 | sbi->write_io[i].sbi = sbi; |
929 | sbi->write_io[i].bio = NULL; | |
930 | } | |
971767ca | 931 | |
e479556b | 932 | init_rwsem(&sbi->cp_rwsem); |
fb51b5ef | 933 | init_waitqueue_head(&sbi->cp_wait); |
aff063e2 JK |
934 | init_sb_info(sbi); |
935 | ||
936 | /* get an inode for meta space */ | |
937 | sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi)); | |
938 | if (IS_ERR(sbi->meta_inode)) { | |
a07ef784 | 939 | f2fs_msg(sb, KERN_ERR, "Failed to read F2FS meta data inode"); |
aff063e2 JK |
940 | err = PTR_ERR(sbi->meta_inode); |
941 | goto free_sb_buf; | |
942 | } | |
943 | ||
944 | err = get_valid_checkpoint(sbi); | |
a07ef784 NJ |
945 | if (err) { |
946 | f2fs_msg(sb, KERN_ERR, "Failed to get valid F2FS checkpoint"); | |
aff063e2 | 947 | goto free_meta_inode; |
a07ef784 | 948 | } |
aff063e2 JK |
949 | |
950 | /* sanity checking of checkpoint */ | |
951 | err = -EINVAL; | |
577e3495 | 952 | if (sanity_check_ckpt(sbi)) { |
a07ef784 | 953 | f2fs_msg(sb, KERN_ERR, "Invalid F2FS checkpoint"); |
aff063e2 | 954 | goto free_cp; |
a07ef784 | 955 | } |
aff063e2 JK |
956 | |
957 | sbi->total_valid_node_count = | |
958 | le32_to_cpu(sbi->ckpt->valid_node_count); | |
959 | sbi->total_valid_inode_count = | |
960 | le32_to_cpu(sbi->ckpt->valid_inode_count); | |
961 | sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count); | |
962 | sbi->total_valid_block_count = | |
963 | le64_to_cpu(sbi->ckpt->valid_block_count); | |
964 | sbi->last_valid_block_count = sbi->total_valid_block_count; | |
965 | sbi->alloc_valid_block_count = 0; | |
966 | INIT_LIST_HEAD(&sbi->dir_inode_list); | |
967 | spin_lock_init(&sbi->dir_inode_lock); | |
968 | ||
aff063e2 JK |
969 | init_orphan_info(sbi); |
970 | ||
971 | /* setup f2fs internal modules */ | |
972 | err = build_segment_manager(sbi); | |
a07ef784 NJ |
973 | if (err) { |
974 | f2fs_msg(sb, KERN_ERR, | |
975 | "Failed to initialize F2FS segment manager"); | |
aff063e2 | 976 | goto free_sm; |
a07ef784 | 977 | } |
aff063e2 | 978 | err = build_node_manager(sbi); |
a07ef784 NJ |
979 | if (err) { |
980 | f2fs_msg(sb, KERN_ERR, | |
981 | "Failed to initialize F2FS node manager"); | |
aff063e2 | 982 | goto free_nm; |
a07ef784 | 983 | } |
aff063e2 JK |
984 | |
985 | build_gc_manager(sbi); | |
986 | ||
987 | /* get an inode for node space */ | |
988 | sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi)); | |
989 | if (IS_ERR(sbi->node_inode)) { | |
a07ef784 | 990 | f2fs_msg(sb, KERN_ERR, "Failed to read node inode"); |
aff063e2 JK |
991 | err = PTR_ERR(sbi->node_inode); |
992 | goto free_nm; | |
993 | } | |
994 | ||
995 | /* if there are nt orphan nodes free them */ | |
8f99a946 | 996 | recover_orphan_inodes(sbi); |
aff063e2 JK |
997 | |
998 | /* read root inode and dentry */ | |
999 | root = f2fs_iget(sb, F2FS_ROOT_INO(sbi)); | |
1000 | if (IS_ERR(root)) { | |
a07ef784 | 1001 | f2fs_msg(sb, KERN_ERR, "Failed to read root inode"); |
aff063e2 JK |
1002 | err = PTR_ERR(root); |
1003 | goto free_node_inode; | |
1004 | } | |
8f99a946 CY |
1005 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { |
1006 | err = -EINVAL; | |
aff063e2 | 1007 | goto free_root_inode; |
8f99a946 | 1008 | } |
aff063e2 JK |
1009 | |
1010 | sb->s_root = d_make_root(root); /* allocate root dentry */ | |
1011 | if (!sb->s_root) { | |
1012 | err = -ENOMEM; | |
1013 | goto free_root_inode; | |
1014 | } | |
1015 | ||
aff063e2 JK |
1016 | err = f2fs_build_stats(sbi); |
1017 | if (err) | |
6437d1b0 | 1018 | goto free_root_inode; |
aff063e2 | 1019 | |
5e176d54 JK |
1020 | if (f2fs_proc_root) |
1021 | sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root); | |
1022 | ||
1023 | if (sbi->s_proc) | |
1024 | proc_create_data("segment_info", S_IRUGO, sbi->s_proc, | |
1025 | &f2fs_seq_segment_info_fops, sb); | |
1026 | ||
d3ee456d NJ |
1027 | if (test_opt(sbi, DISCARD)) { |
1028 | struct request_queue *q = bdev_get_queue(sb->s_bdev); | |
1029 | if (!blk_queue_discard(q)) | |
1030 | f2fs_msg(sb, KERN_WARNING, | |
1031 | "mounting with \"discard\" option, but " | |
1032 | "the device does not support discard"); | |
1033 | } | |
1034 | ||
b59d0bae NJ |
1035 | sbi->s_kobj.kset = f2fs_kset; |
1036 | init_completion(&sbi->s_kobj_unregister); | |
1037 | err = kobject_init_and_add(&sbi->s_kobj, &f2fs_ktype, NULL, | |
1038 | "%s", sb->s_id); | |
1039 | if (err) | |
6437d1b0 | 1040 | goto free_proc; |
b59d0bae | 1041 | |
6437d1b0 JK |
1042 | /* recover fsynced data */ |
1043 | if (!test_opt(sbi, DISABLE_ROLL_FORWARD)) { | |
1044 | err = recover_fsync_data(sbi); | |
1045 | if (err) | |
1046 | f2fs_msg(sb, KERN_ERR, | |
1047 | "Cannot recover all fsync data errno=%ld", err); | |
1048 | } | |
1049 | ||
1050 | /* | |
1051 | * If filesystem is not mounted as read-only then | |
1052 | * do start the gc_thread. | |
1053 | */ | |
1054 | if (!(sb->s_flags & MS_RDONLY)) { | |
1055 | /* After POR, we can run background GC thread.*/ | |
1056 | err = start_gc_thread(sbi); | |
1057 | if (err) | |
1058 | goto free_kobj; | |
1059 | } | |
aff063e2 | 1060 | return 0; |
6437d1b0 JK |
1061 | |
1062 | free_kobj: | |
1063 | kobject_del(&sbi->s_kobj); | |
1064 | free_proc: | |
1d15bd20 CY |
1065 | if (sbi->s_proc) { |
1066 | remove_proc_entry("segment_info", sbi->s_proc); | |
1067 | remove_proc_entry(sb->s_id, f2fs_proc_root); | |
1068 | } | |
1069 | f2fs_destroy_stats(sbi); | |
aff063e2 JK |
1070 | free_root_inode: |
1071 | dput(sb->s_root); | |
1072 | sb->s_root = NULL; | |
1073 | free_node_inode: | |
1074 | iput(sbi->node_inode); | |
1075 | free_nm: | |
1076 | destroy_node_manager(sbi); | |
1077 | free_sm: | |
1078 | destroy_segment_manager(sbi); | |
1079 | free_cp: | |
1080 | kfree(sbi->ckpt); | |
1081 | free_meta_inode: | |
1082 | make_bad_inode(sbi->meta_inode); | |
1083 | iput(sbi->meta_inode); | |
1084 | free_sb_buf: | |
1085 | brelse(raw_super_buf); | |
1086 | free_sbi: | |
1087 | kfree(sbi); | |
1088 | return err; | |
1089 | } | |
1090 | ||
1091 | static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags, | |
1092 | const char *dev_name, void *data) | |
1093 | { | |
1094 | return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super); | |
1095 | } | |
1096 | ||
1097 | static struct file_system_type f2fs_fs_type = { | |
1098 | .owner = THIS_MODULE, | |
1099 | .name = "f2fs", | |
1100 | .mount = f2fs_mount, | |
1101 | .kill_sb = kill_block_super, | |
1102 | .fs_flags = FS_REQUIRES_DEV, | |
1103 | }; | |
7f78e035 | 1104 | MODULE_ALIAS_FS("f2fs"); |
aff063e2 | 1105 | |
6e6093a8 | 1106 | static int __init init_inodecache(void) |
aff063e2 JK |
1107 | { |
1108 | f2fs_inode_cachep = f2fs_kmem_cache_create("f2fs_inode_cache", | |
e8512d2e | 1109 | sizeof(struct f2fs_inode_info)); |
6bacf52f | 1110 | if (!f2fs_inode_cachep) |
aff063e2 JK |
1111 | return -ENOMEM; |
1112 | return 0; | |
1113 | } | |
1114 | ||
1115 | static void destroy_inodecache(void) | |
1116 | { | |
1117 | /* | |
1118 | * Make sure all delayed rcu free inodes are flushed before we | |
1119 | * destroy cache. | |
1120 | */ | |
1121 | rcu_barrier(); | |
1122 | kmem_cache_destroy(f2fs_inode_cachep); | |
1123 | } | |
1124 | ||
1125 | static int __init init_f2fs_fs(void) | |
1126 | { | |
1127 | int err; | |
1128 | ||
1129 | err = init_inodecache(); | |
1130 | if (err) | |
1131 | goto fail; | |
1132 | err = create_node_manager_caches(); | |
1133 | if (err) | |
9890ff3f | 1134 | goto free_inodecache; |
7fd9e544 | 1135 | err = create_segment_manager_caches(); |
aff063e2 | 1136 | if (err) |
9890ff3f | 1137 | goto free_node_manager_caches; |
7fd9e544 JK |
1138 | err = create_gc_caches(); |
1139 | if (err) | |
1140 | goto free_segment_manager_caches; | |
aff063e2 JK |
1141 | err = create_checkpoint_caches(); |
1142 | if (err) | |
9890ff3f | 1143 | goto free_gc_caches; |
b59d0bae | 1144 | f2fs_kset = kset_create_and_add("f2fs", NULL, fs_kobj); |
6e6b978c WY |
1145 | if (!f2fs_kset) { |
1146 | err = -ENOMEM; | |
9890ff3f | 1147 | goto free_checkpoint_caches; |
6e6b978c | 1148 | } |
4589d25d NJ |
1149 | err = register_filesystem(&f2fs_fs_type); |
1150 | if (err) | |
9890ff3f | 1151 | goto free_kset; |
4589d25d | 1152 | f2fs_create_root_stats(); |
5e176d54 | 1153 | f2fs_proc_root = proc_mkdir("fs/f2fs", NULL); |
9890ff3f ZH |
1154 | return 0; |
1155 | ||
1156 | free_kset: | |
1157 | kset_unregister(f2fs_kset); | |
1158 | free_checkpoint_caches: | |
1159 | destroy_checkpoint_caches(); | |
1160 | free_gc_caches: | |
1161 | destroy_gc_caches(); | |
7fd9e544 JK |
1162 | free_segment_manager_caches: |
1163 | destroy_segment_manager_caches(); | |
9890ff3f ZH |
1164 | free_node_manager_caches: |
1165 | destroy_node_manager_caches(); | |
1166 | free_inodecache: | |
1167 | destroy_inodecache(); | |
aff063e2 JK |
1168 | fail: |
1169 | return err; | |
1170 | } | |
1171 | ||
1172 | static void __exit exit_f2fs_fs(void) | |
1173 | { | |
5e176d54 | 1174 | remove_proc_entry("fs/f2fs", NULL); |
4589d25d | 1175 | f2fs_destroy_root_stats(); |
aff063e2 JK |
1176 | unregister_filesystem(&f2fs_fs_type); |
1177 | destroy_checkpoint_caches(); | |
1178 | destroy_gc_caches(); | |
5dcd8a71 | 1179 | destroy_segment_manager_caches(); |
aff063e2 JK |
1180 | destroy_node_manager_caches(); |
1181 | destroy_inodecache(); | |
b59d0bae | 1182 | kset_unregister(f2fs_kset); |
aff063e2 JK |
1183 | } |
1184 | ||
1185 | module_init(init_f2fs_fs) | |
1186 | module_exit(exit_f2fs_fs) | |
1187 | ||
1188 | MODULE_AUTHOR("Samsung Electronics's Praesto Team"); | |
1189 | MODULE_DESCRIPTION("Flash Friendly File System"); | |
1190 | MODULE_LICENSE("GPL"); |