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 */ | |
b1c57c1c | 77 | F2FS_SBI, /* struct f2fs_sb_info */ |
ea91e9b0 JK |
78 | }; |
79 | ||
b59d0bae NJ |
80 | struct f2fs_attr { |
81 | struct attribute attr; | |
82 | ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *); | |
83 | ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *, | |
84 | const char *, size_t); | |
ea91e9b0 | 85 | int struct_type; |
b59d0bae NJ |
86 | int offset; |
87 | }; | |
88 | ||
ea91e9b0 JK |
89 | static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type) |
90 | { | |
91 | if (struct_type == GC_THREAD) | |
92 | return (unsigned char *)sbi->gc_thread; | |
93 | else if (struct_type == SM_INFO) | |
94 | return (unsigned char *)SM_I(sbi); | |
b1c57c1c JK |
95 | else if (struct_type == F2FS_SBI) |
96 | return (unsigned char *)sbi; | |
ea91e9b0 JK |
97 | return NULL; |
98 | } | |
99 | ||
b59d0bae NJ |
100 | static ssize_t f2fs_sbi_show(struct f2fs_attr *a, |
101 | struct f2fs_sb_info *sbi, char *buf) | |
102 | { | |
ea91e9b0 | 103 | unsigned char *ptr = NULL; |
b59d0bae NJ |
104 | unsigned int *ui; |
105 | ||
ea91e9b0 JK |
106 | ptr = __struct_ptr(sbi, a->struct_type); |
107 | if (!ptr) | |
b59d0bae NJ |
108 | return -EINVAL; |
109 | ||
ea91e9b0 | 110 | ui = (unsigned int *)(ptr + a->offset); |
b59d0bae NJ |
111 | |
112 | return snprintf(buf, PAGE_SIZE, "%u\n", *ui); | |
113 | } | |
114 | ||
115 | static ssize_t f2fs_sbi_store(struct f2fs_attr *a, | |
116 | struct f2fs_sb_info *sbi, | |
117 | const char *buf, size_t count) | |
118 | { | |
ea91e9b0 | 119 | unsigned char *ptr; |
b59d0bae NJ |
120 | unsigned long t; |
121 | unsigned int *ui; | |
122 | ssize_t ret; | |
123 | ||
ea91e9b0 JK |
124 | ptr = __struct_ptr(sbi, a->struct_type); |
125 | if (!ptr) | |
b59d0bae NJ |
126 | return -EINVAL; |
127 | ||
ea91e9b0 | 128 | ui = (unsigned int *)(ptr + a->offset); |
b59d0bae NJ |
129 | |
130 | ret = kstrtoul(skip_spaces(buf), 0, &t); | |
131 | if (ret < 0) | |
132 | return ret; | |
133 | *ui = t; | |
134 | return count; | |
135 | } | |
136 | ||
137 | static ssize_t f2fs_attr_show(struct kobject *kobj, | |
138 | struct attribute *attr, char *buf) | |
139 | { | |
140 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, | |
141 | s_kobj); | |
142 | struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); | |
143 | ||
144 | return a->show ? a->show(a, sbi, buf) : 0; | |
145 | } | |
146 | ||
147 | static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr, | |
148 | const char *buf, size_t len) | |
149 | { | |
150 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, | |
151 | s_kobj); | |
152 | struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); | |
153 | ||
154 | return a->store ? a->store(a, sbi, buf, len) : 0; | |
155 | } | |
156 | ||
157 | static void f2fs_sb_release(struct kobject *kobj) | |
158 | { | |
159 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, | |
160 | s_kobj); | |
161 | complete(&sbi->s_kobj_unregister); | |
162 | } | |
163 | ||
ea91e9b0 | 164 | #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \ |
b59d0bae NJ |
165 | static struct f2fs_attr f2fs_attr_##_name = { \ |
166 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
167 | .show = _show, \ | |
168 | .store = _store, \ | |
ea91e9b0 JK |
169 | .struct_type = _struct_type, \ |
170 | .offset = _offset \ | |
b59d0bae NJ |
171 | } |
172 | ||
ea91e9b0 JK |
173 | #define F2FS_RW_ATTR(struct_type, struct_name, name, elname) \ |
174 | F2FS_ATTR_OFFSET(struct_type, name, 0644, \ | |
175 | f2fs_sbi_show, f2fs_sbi_store, \ | |
176 | offsetof(struct struct_name, elname)) | |
b59d0bae | 177 | |
ea91e9b0 JK |
178 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time); |
179 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time); | |
180 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time); | |
181 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_idle, gc_idle); | |
182 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments); | |
7ac8c3b0 | 183 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, max_small_discards, max_discards); |
216fbd64 JK |
184 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy); |
185 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util); | |
b1c57c1c | 186 | F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search); |
b59d0bae NJ |
187 | |
188 | #define ATTR_LIST(name) (&f2fs_attr_##name.attr) | |
189 | static struct attribute *f2fs_attrs[] = { | |
190 | ATTR_LIST(gc_min_sleep_time), | |
191 | ATTR_LIST(gc_max_sleep_time), | |
192 | ATTR_LIST(gc_no_gc_sleep_time), | |
d2dc095f | 193 | ATTR_LIST(gc_idle), |
ea91e9b0 | 194 | ATTR_LIST(reclaim_segments), |
7ac8c3b0 | 195 | ATTR_LIST(max_small_discards), |
216fbd64 JK |
196 | ATTR_LIST(ipu_policy), |
197 | ATTR_LIST(min_ipu_util), | |
b1c57c1c | 198 | ATTR_LIST(max_victim_search), |
b59d0bae NJ |
199 | NULL, |
200 | }; | |
201 | ||
202 | static const struct sysfs_ops f2fs_attr_ops = { | |
203 | .show = f2fs_attr_show, | |
204 | .store = f2fs_attr_store, | |
205 | }; | |
206 | ||
207 | static struct kobj_type f2fs_ktype = { | |
208 | .default_attrs = f2fs_attrs, | |
209 | .sysfs_ops = &f2fs_attr_ops, | |
210 | .release = f2fs_sb_release, | |
211 | }; | |
212 | ||
a07ef784 NJ |
213 | void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...) |
214 | { | |
215 | struct va_format vaf; | |
216 | va_list args; | |
217 | ||
218 | va_start(args, fmt); | |
219 | vaf.fmt = fmt; | |
220 | vaf.va = &args; | |
221 | printk("%sF2FS-fs (%s): %pV\n", level, sb->s_id, &vaf); | |
222 | va_end(args); | |
223 | } | |
224 | ||
aff063e2 JK |
225 | static void init_once(void *foo) |
226 | { | |
227 | struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo; | |
228 | ||
aff063e2 JK |
229 | inode_init_once(&fi->vfs_inode); |
230 | } | |
231 | ||
696c018c NJ |
232 | static int parse_options(struct super_block *sb, char *options) |
233 | { | |
234 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
235 | substring_t args[MAX_OPT_ARGS]; | |
236 | char *p, *name; | |
237 | int arg = 0; | |
238 | ||
239 | if (!options) | |
240 | return 0; | |
241 | ||
242 | while ((p = strsep(&options, ",")) != NULL) { | |
243 | int token; | |
244 | if (!*p) | |
245 | continue; | |
246 | /* | |
247 | * Initialize args struct so we know whether arg was | |
248 | * found; some options take optional arguments. | |
249 | */ | |
250 | args[0].to = args[0].from = NULL; | |
251 | token = match_token(p, f2fs_tokens, args); | |
252 | ||
253 | switch (token) { | |
254 | case Opt_gc_background: | |
255 | name = match_strdup(&args[0]); | |
256 | ||
257 | if (!name) | |
258 | return -ENOMEM; | |
259 | if (!strncmp(name, "on", 2)) | |
260 | set_opt(sbi, BG_GC); | |
261 | else if (!strncmp(name, "off", 3)) | |
262 | clear_opt(sbi, BG_GC); | |
263 | else { | |
264 | kfree(name); | |
265 | return -EINVAL; | |
266 | } | |
267 | kfree(name); | |
268 | break; | |
269 | case Opt_disable_roll_forward: | |
270 | set_opt(sbi, DISABLE_ROLL_FORWARD); | |
271 | break; | |
272 | case Opt_discard: | |
273 | set_opt(sbi, DISCARD); | |
274 | break; | |
275 | case Opt_noheap: | |
276 | set_opt(sbi, NOHEAP); | |
277 | break; | |
278 | #ifdef CONFIG_F2FS_FS_XATTR | |
4058c511 KA |
279 | case Opt_user_xattr: |
280 | set_opt(sbi, XATTR_USER); | |
281 | break; | |
696c018c NJ |
282 | case Opt_nouser_xattr: |
283 | clear_opt(sbi, XATTR_USER); | |
284 | break; | |
444c580f JK |
285 | case Opt_inline_xattr: |
286 | set_opt(sbi, INLINE_XATTR); | |
287 | break; | |
696c018c | 288 | #else |
4058c511 KA |
289 | case Opt_user_xattr: |
290 | f2fs_msg(sb, KERN_INFO, | |
291 | "user_xattr options not supported"); | |
292 | break; | |
696c018c NJ |
293 | case Opt_nouser_xattr: |
294 | f2fs_msg(sb, KERN_INFO, | |
295 | "nouser_xattr options not supported"); | |
296 | break; | |
444c580f JK |
297 | case Opt_inline_xattr: |
298 | f2fs_msg(sb, KERN_INFO, | |
299 | "inline_xattr options not supported"); | |
300 | break; | |
696c018c NJ |
301 | #endif |
302 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
4058c511 KA |
303 | case Opt_acl: |
304 | set_opt(sbi, POSIX_ACL); | |
305 | break; | |
696c018c NJ |
306 | case Opt_noacl: |
307 | clear_opt(sbi, POSIX_ACL); | |
308 | break; | |
309 | #else | |
4058c511 KA |
310 | case Opt_acl: |
311 | f2fs_msg(sb, KERN_INFO, "acl options not supported"); | |
312 | break; | |
696c018c NJ |
313 | case Opt_noacl: |
314 | f2fs_msg(sb, KERN_INFO, "noacl options not supported"); | |
315 | break; | |
316 | #endif | |
317 | case Opt_active_logs: | |
318 | if (args->from && match_int(args, &arg)) | |
319 | return -EINVAL; | |
320 | if (arg != 2 && arg != 4 && arg != NR_CURSEG_TYPE) | |
321 | return -EINVAL; | |
322 | sbi->active_logs = arg; | |
323 | break; | |
324 | case Opt_disable_ext_identify: | |
325 | set_opt(sbi, DISABLE_EXT_IDENTIFY); | |
326 | break; | |
8274de77 HL |
327 | case Opt_inline_data: |
328 | set_opt(sbi, INLINE_DATA); | |
329 | break; | |
696c018c NJ |
330 | default: |
331 | f2fs_msg(sb, KERN_ERR, | |
332 | "Unrecognized mount option \"%s\" or missing value", | |
333 | p); | |
334 | return -EINVAL; | |
335 | } | |
336 | } | |
337 | return 0; | |
338 | } | |
339 | ||
aff063e2 JK |
340 | static struct inode *f2fs_alloc_inode(struct super_block *sb) |
341 | { | |
342 | struct f2fs_inode_info *fi; | |
343 | ||
a0acdfe0 | 344 | fi = kmem_cache_alloc(f2fs_inode_cachep, GFP_F2FS_ZERO); |
aff063e2 JK |
345 | if (!fi) |
346 | return NULL; | |
347 | ||
348 | init_once((void *) fi); | |
349 | ||
434720fa | 350 | /* Initialize f2fs-specific inode info */ |
aff063e2 JK |
351 | fi->vfs_inode.i_version = 1; |
352 | atomic_set(&fi->dirty_dents, 0); | |
353 | fi->i_current_depth = 1; | |
354 | fi->i_advise = 0; | |
355 | rwlock_init(&fi->ext.ext_lock); | |
356 | ||
357 | set_inode_flag(fi, FI_NEW_INODE); | |
358 | ||
444c580f JK |
359 | if (test_opt(F2FS_SB(sb), INLINE_XATTR)) |
360 | set_inode_flag(fi, FI_INLINE_XATTR); | |
361 | ||
aff063e2 JK |
362 | return &fi->vfs_inode; |
363 | } | |
364 | ||
531ad7d5 JK |
365 | static int f2fs_drop_inode(struct inode *inode) |
366 | { | |
367 | /* | |
368 | * This is to avoid a deadlock condition like below. | |
369 | * writeback_single_inode(inode) | |
370 | * - f2fs_write_data_page | |
371 | * - f2fs_gc -> iput -> evict | |
372 | * - inode_wait_for_writeback(inode) | |
373 | */ | |
374 | if (!inode_unhashed(inode) && inode->i_state & I_SYNC) | |
375 | return 0; | |
376 | return generic_drop_inode(inode); | |
377 | } | |
378 | ||
b3783873 JK |
379 | /* |
380 | * f2fs_dirty_inode() is called from __mark_inode_dirty() | |
381 | * | |
382 | * We should call set_dirty_inode to write the dirty inode through write_inode. | |
383 | */ | |
384 | static void f2fs_dirty_inode(struct inode *inode, int flags) | |
385 | { | |
386 | set_inode_flag(F2FS_I(inode), FI_DIRTY_INODE); | |
b3783873 JK |
387 | } |
388 | ||
aff063e2 JK |
389 | static void f2fs_i_callback(struct rcu_head *head) |
390 | { | |
391 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
392 | kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode)); | |
393 | } | |
394 | ||
25ca923b | 395 | static void f2fs_destroy_inode(struct inode *inode) |
aff063e2 JK |
396 | { |
397 | call_rcu(&inode->i_rcu, f2fs_i_callback); | |
398 | } | |
399 | ||
400 | static void f2fs_put_super(struct super_block *sb) | |
401 | { | |
402 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
403 | ||
5e176d54 JK |
404 | if (sbi->s_proc) { |
405 | remove_proc_entry("segment_info", sbi->s_proc); | |
406 | remove_proc_entry(sb->s_id, f2fs_proc_root); | |
407 | } | |
b59d0bae | 408 | kobject_del(&sbi->s_kobj); |
5e176d54 | 409 | |
aff063e2 JK |
410 | f2fs_destroy_stats(sbi); |
411 | stop_gc_thread(sbi); | |
412 | ||
5887d291 JK |
413 | /* We don't need to do checkpoint when it's clean */ |
414 | if (sbi->s_dirty && get_pages(sbi, F2FS_DIRTY_NODES)) | |
415 | write_checkpoint(sbi, true); | |
aff063e2 JK |
416 | |
417 | iput(sbi->node_inode); | |
418 | iput(sbi->meta_inode); | |
419 | ||
420 | /* destroy f2fs internal modules */ | |
421 | destroy_node_manager(sbi); | |
422 | destroy_segment_manager(sbi); | |
423 | ||
424 | kfree(sbi->ckpt); | |
b59d0bae NJ |
425 | kobject_put(&sbi->s_kobj); |
426 | wait_for_completion(&sbi->s_kobj_unregister); | |
aff063e2 JK |
427 | |
428 | sb->s_fs_info = NULL; | |
429 | brelse(sbi->raw_super_buf); | |
430 | kfree(sbi); | |
431 | } | |
432 | ||
433 | int f2fs_sync_fs(struct super_block *sb, int sync) | |
434 | { | |
435 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
aff063e2 | 436 | |
a2a4a7e4 NJ |
437 | trace_f2fs_sync_fs(sb, sync); |
438 | ||
aff063e2 JK |
439 | if (!sbi->s_dirty && !get_pages(sbi, F2FS_DIRTY_NODES)) |
440 | return 0; | |
441 | ||
b7473754 JK |
442 | if (sync) { |
443 | mutex_lock(&sbi->gc_mutex); | |
43727527 | 444 | write_checkpoint(sbi, false); |
b7473754 JK |
445 | mutex_unlock(&sbi->gc_mutex); |
446 | } else { | |
7d82db83 | 447 | f2fs_balance_fs(sbi); |
b7473754 | 448 | } |
aff063e2 | 449 | |
64c576fe | 450 | return 0; |
aff063e2 JK |
451 | } |
452 | ||
d6212a5f CL |
453 | static int f2fs_freeze(struct super_block *sb) |
454 | { | |
455 | int err; | |
456 | ||
77888c1e | 457 | if (f2fs_readonly(sb)) |
d6212a5f CL |
458 | return 0; |
459 | ||
460 | err = f2fs_sync_fs(sb, 1); | |
461 | return err; | |
462 | } | |
463 | ||
464 | static int f2fs_unfreeze(struct super_block *sb) | |
465 | { | |
466 | return 0; | |
467 | } | |
468 | ||
aff063e2 JK |
469 | static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf) |
470 | { | |
471 | struct super_block *sb = dentry->d_sb; | |
472 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
473 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); | |
474 | block_t total_count, user_block_count, start_count, ovp_count; | |
475 | ||
476 | total_count = le64_to_cpu(sbi->raw_super->block_count); | |
477 | user_block_count = sbi->user_block_count; | |
478 | start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr); | |
479 | ovp_count = SM_I(sbi)->ovp_segments << sbi->log_blocks_per_seg; | |
480 | buf->f_type = F2FS_SUPER_MAGIC; | |
481 | buf->f_bsize = sbi->blocksize; | |
482 | ||
483 | buf->f_blocks = total_count - start_count; | |
484 | buf->f_bfree = buf->f_blocks - valid_user_blocks(sbi) - ovp_count; | |
485 | buf->f_bavail = user_block_count - valid_user_blocks(sbi); | |
486 | ||
1362b5e3 JK |
487 | buf->f_files = sbi->total_node_count; |
488 | buf->f_ffree = sbi->total_node_count - valid_inode_count(sbi); | |
aff063e2 | 489 | |
5a20d339 | 490 | buf->f_namelen = F2FS_NAME_LEN; |
aff063e2 JK |
491 | buf->f_fsid.val[0] = (u32)id; |
492 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
493 | ||
494 | return 0; | |
495 | } | |
496 | ||
497 | static int f2fs_show_options(struct seq_file *seq, struct dentry *root) | |
498 | { | |
499 | struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb); | |
500 | ||
696c018c NJ |
501 | if (!(root->d_sb->s_flags & MS_RDONLY) && test_opt(sbi, BG_GC)) |
502 | seq_printf(seq, ",background_gc=%s", "on"); | |
aff063e2 | 503 | else |
696c018c | 504 | seq_printf(seq, ",background_gc=%s", "off"); |
aff063e2 JK |
505 | if (test_opt(sbi, DISABLE_ROLL_FORWARD)) |
506 | seq_puts(seq, ",disable_roll_forward"); | |
507 | if (test_opt(sbi, DISCARD)) | |
508 | seq_puts(seq, ",discard"); | |
509 | if (test_opt(sbi, NOHEAP)) | |
510 | seq_puts(seq, ",no_heap_alloc"); | |
511 | #ifdef CONFIG_F2FS_FS_XATTR | |
512 | if (test_opt(sbi, XATTR_USER)) | |
513 | seq_puts(seq, ",user_xattr"); | |
514 | else | |
515 | seq_puts(seq, ",nouser_xattr"); | |
444c580f JK |
516 | if (test_opt(sbi, INLINE_XATTR)) |
517 | seq_puts(seq, ",inline_xattr"); | |
aff063e2 JK |
518 | #endif |
519 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
520 | if (test_opt(sbi, POSIX_ACL)) | |
521 | seq_puts(seq, ",acl"); | |
522 | else | |
523 | seq_puts(seq, ",noacl"); | |
524 | #endif | |
525 | if (test_opt(sbi, DISABLE_EXT_IDENTIFY)) | |
aa43507f | 526 | seq_puts(seq, ",disable_ext_identify"); |
8274de77 HL |
527 | if (test_opt(sbi, INLINE_DATA)) |
528 | seq_puts(seq, ",inline_data"); | |
aff063e2 JK |
529 | seq_printf(seq, ",active_logs=%u", sbi->active_logs); |
530 | ||
531 | return 0; | |
532 | } | |
533 | ||
5e176d54 JK |
534 | static int segment_info_seq_show(struct seq_file *seq, void *offset) |
535 | { | |
536 | struct super_block *sb = seq->private; | |
537 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
6c311ec6 CF |
538 | unsigned int total_segs = |
539 | le32_to_cpu(sbi->raw_super->segment_count_main); | |
5e176d54 JK |
540 | int i; |
541 | ||
542 | for (i = 0; i < total_segs; i++) { | |
543 | seq_printf(seq, "%u", get_valid_blocks(sbi, i, 1)); | |
544 | if (i != 0 && (i % 10) == 0) | |
545 | seq_puts(seq, "\n"); | |
546 | else | |
547 | seq_puts(seq, " "); | |
548 | } | |
549 | return 0; | |
550 | } | |
551 | ||
552 | static int segment_info_open_fs(struct inode *inode, struct file *file) | |
553 | { | |
554 | return single_open(file, segment_info_seq_show, PDE_DATA(inode)); | |
555 | } | |
556 | ||
557 | static const struct file_operations f2fs_seq_segment_info_fops = { | |
558 | .owner = THIS_MODULE, | |
559 | .open = segment_info_open_fs, | |
560 | .read = seq_read, | |
561 | .llseek = seq_lseek, | |
562 | .release = single_release, | |
563 | }; | |
564 | ||
696c018c NJ |
565 | static int f2fs_remount(struct super_block *sb, int *flags, char *data) |
566 | { | |
567 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
568 | struct f2fs_mount_info org_mount_opt; | |
569 | int err, active_logs; | |
570 | ||
571 | /* | |
572 | * Save the old mount options in case we | |
573 | * need to restore them. | |
574 | */ | |
575 | org_mount_opt = sbi->mount_opt; | |
576 | active_logs = sbi->active_logs; | |
577 | ||
578 | /* parse mount options */ | |
579 | err = parse_options(sb, data); | |
580 | if (err) | |
581 | goto restore_opts; | |
582 | ||
583 | /* | |
584 | * Previous and new state of filesystem is RO, | |
585 | * so no point in checking GC conditions. | |
586 | */ | |
587 | if ((sb->s_flags & MS_RDONLY) && (*flags & MS_RDONLY)) | |
588 | goto skip; | |
589 | ||
590 | /* | |
591 | * We stop the GC thread if FS is mounted as RO | |
592 | * or if background_gc = off is passed in mount | |
593 | * option. Also sync the filesystem. | |
594 | */ | |
595 | if ((*flags & MS_RDONLY) || !test_opt(sbi, BG_GC)) { | |
596 | if (sbi->gc_thread) { | |
597 | stop_gc_thread(sbi); | |
598 | f2fs_sync_fs(sb, 1); | |
599 | } | |
600 | } else if (test_opt(sbi, BG_GC) && !sbi->gc_thread) { | |
601 | err = start_gc_thread(sbi); | |
602 | if (err) | |
603 | goto restore_opts; | |
604 | } | |
605 | skip: | |
606 | /* Update the POSIXACL Flag */ | |
607 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
608 | (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0); | |
609 | return 0; | |
610 | ||
611 | restore_opts: | |
612 | sbi->mount_opt = org_mount_opt; | |
613 | sbi->active_logs = active_logs; | |
614 | return err; | |
615 | } | |
616 | ||
aff063e2 JK |
617 | static struct super_operations f2fs_sops = { |
618 | .alloc_inode = f2fs_alloc_inode, | |
531ad7d5 | 619 | .drop_inode = f2fs_drop_inode, |
aff063e2 JK |
620 | .destroy_inode = f2fs_destroy_inode, |
621 | .write_inode = f2fs_write_inode, | |
b3783873 | 622 | .dirty_inode = f2fs_dirty_inode, |
aff063e2 JK |
623 | .show_options = f2fs_show_options, |
624 | .evict_inode = f2fs_evict_inode, | |
625 | .put_super = f2fs_put_super, | |
626 | .sync_fs = f2fs_sync_fs, | |
d6212a5f CL |
627 | .freeze_fs = f2fs_freeze, |
628 | .unfreeze_fs = f2fs_unfreeze, | |
aff063e2 | 629 | .statfs = f2fs_statfs, |
696c018c | 630 | .remount_fs = f2fs_remount, |
aff063e2 JK |
631 | }; |
632 | ||
633 | static struct inode *f2fs_nfs_get_inode(struct super_block *sb, | |
634 | u64 ino, u32 generation) | |
635 | { | |
636 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
637 | struct inode *inode; | |
638 | ||
6bacf52f | 639 | if (unlikely(ino < F2FS_ROOT_INO(sbi))) |
aff063e2 JK |
640 | return ERR_PTR(-ESTALE); |
641 | ||
642 | /* | |
643 | * f2fs_iget isn't quite right if the inode is currently unallocated! | |
644 | * However f2fs_iget currently does appropriate checks to handle stale | |
645 | * inodes so everything is OK. | |
646 | */ | |
647 | inode = f2fs_iget(sb, ino); | |
648 | if (IS_ERR(inode)) | |
649 | return ERR_CAST(inode); | |
6bacf52f | 650 | if (unlikely(generation && inode->i_generation != generation)) { |
aff063e2 JK |
651 | /* we didn't find the right inode.. */ |
652 | iput(inode); | |
653 | return ERR_PTR(-ESTALE); | |
654 | } | |
655 | return inode; | |
656 | } | |
657 | ||
658 | static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
659 | int fh_len, int fh_type) | |
660 | { | |
661 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
662 | f2fs_nfs_get_inode); | |
663 | } | |
664 | ||
665 | static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid, | |
666 | int fh_len, int fh_type) | |
667 | { | |
668 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
669 | f2fs_nfs_get_inode); | |
670 | } | |
671 | ||
672 | static const struct export_operations f2fs_export_ops = { | |
673 | .fh_to_dentry = f2fs_fh_to_dentry, | |
674 | .fh_to_parent = f2fs_fh_to_parent, | |
675 | .get_parent = f2fs_get_parent, | |
676 | }; | |
677 | ||
aff063e2 JK |
678 | static loff_t max_file_size(unsigned bits) |
679 | { | |
de93653f | 680 | loff_t result = (DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS); |
aff063e2 JK |
681 | loff_t leaf_count = ADDRS_PER_BLOCK; |
682 | ||
683 | /* two direct node blocks */ | |
684 | result += (leaf_count * 2); | |
685 | ||
686 | /* two indirect node blocks */ | |
687 | leaf_count *= NIDS_PER_BLOCK; | |
688 | result += (leaf_count * 2); | |
689 | ||
690 | /* one double indirect node block */ | |
691 | leaf_count *= NIDS_PER_BLOCK; | |
692 | result += leaf_count; | |
693 | ||
694 | result <<= bits; | |
695 | return result; | |
696 | } | |
697 | ||
a07ef784 NJ |
698 | static int sanity_check_raw_super(struct super_block *sb, |
699 | struct f2fs_super_block *raw_super) | |
aff063e2 JK |
700 | { |
701 | unsigned int blocksize; | |
702 | ||
a07ef784 NJ |
703 | if (F2FS_SUPER_MAGIC != le32_to_cpu(raw_super->magic)) { |
704 | f2fs_msg(sb, KERN_INFO, | |
705 | "Magic Mismatch, valid(0x%x) - read(0x%x)", | |
706 | F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic)); | |
aff063e2 | 707 | return 1; |
a07ef784 | 708 | } |
aff063e2 | 709 | |
5c9b4692 | 710 | /* Currently, support only 4KB page cache size */ |
711 | if (F2FS_BLKSIZE != PAGE_CACHE_SIZE) { | |
712 | f2fs_msg(sb, KERN_INFO, | |
14d7e9de | 713 | "Invalid page_cache_size (%lu), supports only 4KB\n", |
5c9b4692 | 714 | PAGE_CACHE_SIZE); |
715 | return 1; | |
716 | } | |
717 | ||
aff063e2 JK |
718 | /* Currently, support only 4KB block size */ |
719 | blocksize = 1 << le32_to_cpu(raw_super->log_blocksize); | |
5c9b4692 | 720 | if (blocksize != F2FS_BLKSIZE) { |
a07ef784 NJ |
721 | f2fs_msg(sb, KERN_INFO, |
722 | "Invalid blocksize (%u), supports only 4KB\n", | |
723 | blocksize); | |
aff063e2 | 724 | return 1; |
a07ef784 | 725 | } |
5c9b4692 | 726 | |
aff063e2 | 727 | if (le32_to_cpu(raw_super->log_sectorsize) != |
a07ef784 NJ |
728 | F2FS_LOG_SECTOR_SIZE) { |
729 | f2fs_msg(sb, KERN_INFO, "Invalid log sectorsize"); | |
aff063e2 | 730 | return 1; |
a07ef784 | 731 | } |
aff063e2 | 732 | if (le32_to_cpu(raw_super->log_sectors_per_block) != |
a07ef784 NJ |
733 | F2FS_LOG_SECTORS_PER_BLOCK) { |
734 | f2fs_msg(sb, KERN_INFO, "Invalid log sectors per block"); | |
aff063e2 | 735 | return 1; |
a07ef784 | 736 | } |
aff063e2 JK |
737 | return 0; |
738 | } | |
739 | ||
577e3495 | 740 | static int sanity_check_ckpt(struct f2fs_sb_info *sbi) |
aff063e2 JK |
741 | { |
742 | unsigned int total, fsmeta; | |
577e3495 JK |
743 | struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); |
744 | struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); | |
aff063e2 JK |
745 | |
746 | total = le32_to_cpu(raw_super->segment_count); | |
747 | fsmeta = le32_to_cpu(raw_super->segment_count_ckpt); | |
748 | fsmeta += le32_to_cpu(raw_super->segment_count_sit); | |
749 | fsmeta += le32_to_cpu(raw_super->segment_count_nat); | |
750 | fsmeta += le32_to_cpu(ckpt->rsvd_segment_count); | |
751 | fsmeta += le32_to_cpu(raw_super->segment_count_ssa); | |
752 | ||
6bacf52f | 753 | if (unlikely(fsmeta >= total)) |
aff063e2 | 754 | return 1; |
577e3495 | 755 | |
6bacf52f | 756 | if (unlikely(is_set_ckpt_flags(ckpt, CP_ERROR_FLAG))) { |
577e3495 JK |
757 | f2fs_msg(sbi->sb, KERN_ERR, "A bug case: need to run fsck"); |
758 | return 1; | |
759 | } | |
aff063e2 JK |
760 | return 0; |
761 | } | |
762 | ||
763 | static void init_sb_info(struct f2fs_sb_info *sbi) | |
764 | { | |
765 | struct f2fs_super_block *raw_super = sbi->raw_super; | |
766 | int i; | |
767 | ||
768 | sbi->log_sectors_per_block = | |
769 | le32_to_cpu(raw_super->log_sectors_per_block); | |
770 | sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize); | |
771 | sbi->blocksize = 1 << sbi->log_blocksize; | |
772 | sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg); | |
773 | sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg; | |
774 | sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec); | |
775 | sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone); | |
776 | sbi->total_sections = le32_to_cpu(raw_super->section_count); | |
777 | sbi->total_node_count = | |
778 | (le32_to_cpu(raw_super->segment_count_nat) / 2) | |
779 | * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK; | |
780 | sbi->root_ino_num = le32_to_cpu(raw_super->root_ino); | |
781 | sbi->node_ino_num = le32_to_cpu(raw_super->node_ino); | |
782 | sbi->meta_ino_num = le32_to_cpu(raw_super->meta_ino); | |
5ec4e49f | 783 | sbi->cur_victim_sec = NULL_SECNO; |
b1c57c1c | 784 | sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH; |
aff063e2 JK |
785 | |
786 | for (i = 0; i < NR_COUNT_TYPE; i++) | |
787 | atomic_set(&sbi->nr_pages[i], 0); | |
788 | } | |
789 | ||
9076a75f GZ |
790 | /* |
791 | * Read f2fs raw super block. | |
792 | * Because we have two copies of super block, so read the first one at first, | |
793 | * if the first one is invalid, move to read the second one. | |
794 | */ | |
795 | static int read_raw_super_block(struct super_block *sb, | |
796 | struct f2fs_super_block **raw_super, | |
797 | struct buffer_head **raw_super_buf) | |
14d7e9de | 798 | { |
9076a75f | 799 | int block = 0; |
14d7e9de | 800 | |
9076a75f | 801 | retry: |
14d7e9de | 802 | *raw_super_buf = sb_bread(sb, block); |
803 | if (!*raw_super_buf) { | |
9076a75f GZ |
804 | f2fs_msg(sb, KERN_ERR, "Unable to read %dth superblock", |
805 | block + 1); | |
806 | if (block == 0) { | |
807 | block++; | |
808 | goto retry; | |
809 | } else { | |
810 | return -EIO; | |
811 | } | |
14d7e9de | 812 | } |
813 | ||
814 | *raw_super = (struct f2fs_super_block *) | |
815 | ((char *)(*raw_super_buf)->b_data + F2FS_SUPER_OFFSET); | |
816 | ||
817 | /* sanity checking of raw super */ | |
9076a75f GZ |
818 | if (sanity_check_raw_super(sb, *raw_super)) { |
819 | brelse(*raw_super_buf); | |
6c311ec6 CF |
820 | f2fs_msg(sb, KERN_ERR, |
821 | "Can't find valid F2FS filesystem in %dth superblock", | |
822 | block + 1); | |
6bacf52f | 823 | if (block == 0) { |
9076a75f GZ |
824 | block++; |
825 | goto retry; | |
826 | } else { | |
827 | return -EINVAL; | |
828 | } | |
829 | } | |
14d7e9de | 830 | |
9076a75f | 831 | return 0; |
14d7e9de | 832 | } |
833 | ||
aff063e2 JK |
834 | static int f2fs_fill_super(struct super_block *sb, void *data, int silent) |
835 | { | |
836 | struct f2fs_sb_info *sbi; | |
837 | struct f2fs_super_block *raw_super; | |
838 | struct buffer_head *raw_super_buf; | |
839 | struct inode *root; | |
840 | long err = -EINVAL; | |
971767ca | 841 | int i; |
aff063e2 JK |
842 | |
843 | /* allocate memory for f2fs-specific super block info */ | |
844 | sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL); | |
845 | if (!sbi) | |
846 | return -ENOMEM; | |
847 | ||
ff9234ad | 848 | /* set a block size */ |
6bacf52f | 849 | if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) { |
a07ef784 | 850 | f2fs_msg(sb, KERN_ERR, "unable to set blocksize"); |
aff063e2 | 851 | goto free_sbi; |
a07ef784 | 852 | } |
aff063e2 | 853 | |
9076a75f GZ |
854 | err = read_raw_super_block(sb, &raw_super, &raw_super_buf); |
855 | if (err) | |
856 | goto free_sbi; | |
857 | ||
5fb08372 | 858 | sb->s_fs_info = sbi; |
aff063e2 JK |
859 | /* init some FS parameters */ |
860 | sbi->active_logs = NR_CURSEG_TYPE; | |
861 | ||
862 | set_opt(sbi, BG_GC); | |
863 | ||
864 | #ifdef CONFIG_F2FS_FS_XATTR | |
865 | set_opt(sbi, XATTR_USER); | |
866 | #endif | |
867 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
868 | set_opt(sbi, POSIX_ACL); | |
869 | #endif | |
870 | /* parse mount options */ | |
5fb08372 | 871 | err = parse_options(sb, (char *)data); |
66348b72 | 872 | if (err) |
aff063e2 JK |
873 | goto free_sb_buf; |
874 | ||
25ca923b | 875 | sb->s_maxbytes = max_file_size(le32_to_cpu(raw_super->log_blocksize)); |
aff063e2 JK |
876 | sb->s_max_links = F2FS_LINK_MAX; |
877 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
878 | ||
879 | sb->s_op = &f2fs_sops; | |
880 | sb->s_xattr = f2fs_xattr_handlers; | |
881 | sb->s_export_op = &f2fs_export_ops; | |
882 | sb->s_magic = F2FS_SUPER_MAGIC; | |
aff063e2 JK |
883 | sb->s_time_gran = 1; |
884 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
885 | (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0); | |
886 | memcpy(sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid)); | |
887 | ||
888 | /* init f2fs-specific super block info */ | |
889 | sbi->sb = sb; | |
890 | sbi->raw_super = raw_super; | |
891 | sbi->raw_super_buf = raw_super_buf; | |
892 | mutex_init(&sbi->gc_mutex); | |
aff063e2 JK |
893 | mutex_init(&sbi->writepages); |
894 | mutex_init(&sbi->cp_mutex); | |
39936837 | 895 | mutex_init(&sbi->node_write); |
aabe5136 | 896 | sbi->por_doing = false; |
aff063e2 | 897 | spin_lock_init(&sbi->stat_lock); |
971767ca | 898 | |
924b720b | 899 | mutex_init(&sbi->read_io.io_mutex); |
458e6197 JK |
900 | sbi->read_io.sbi = sbi; |
901 | sbi->read_io.bio = NULL; | |
902 | for (i = 0; i < NR_PAGE_TYPE; i++) { | |
1ff7bd3b | 903 | mutex_init(&sbi->write_io[i].io_mutex); |
458e6197 JK |
904 | sbi->write_io[i].sbi = sbi; |
905 | sbi->write_io[i].bio = NULL; | |
906 | } | |
971767ca | 907 | |
e479556b | 908 | init_rwsem(&sbi->cp_rwsem); |
fb51b5ef | 909 | init_waitqueue_head(&sbi->cp_wait); |
aff063e2 JK |
910 | init_sb_info(sbi); |
911 | ||
912 | /* get an inode for meta space */ | |
913 | sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi)); | |
914 | if (IS_ERR(sbi->meta_inode)) { | |
a07ef784 | 915 | f2fs_msg(sb, KERN_ERR, "Failed to read F2FS meta data inode"); |
aff063e2 JK |
916 | err = PTR_ERR(sbi->meta_inode); |
917 | goto free_sb_buf; | |
918 | } | |
919 | ||
920 | err = get_valid_checkpoint(sbi); | |
a07ef784 NJ |
921 | if (err) { |
922 | f2fs_msg(sb, KERN_ERR, "Failed to get valid F2FS checkpoint"); | |
aff063e2 | 923 | goto free_meta_inode; |
a07ef784 | 924 | } |
aff063e2 JK |
925 | |
926 | /* sanity checking of checkpoint */ | |
927 | err = -EINVAL; | |
577e3495 | 928 | if (sanity_check_ckpt(sbi)) { |
a07ef784 | 929 | f2fs_msg(sb, KERN_ERR, "Invalid F2FS checkpoint"); |
aff063e2 | 930 | goto free_cp; |
a07ef784 | 931 | } |
aff063e2 JK |
932 | |
933 | sbi->total_valid_node_count = | |
934 | le32_to_cpu(sbi->ckpt->valid_node_count); | |
935 | sbi->total_valid_inode_count = | |
936 | le32_to_cpu(sbi->ckpt->valid_inode_count); | |
937 | sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count); | |
938 | sbi->total_valid_block_count = | |
939 | le64_to_cpu(sbi->ckpt->valid_block_count); | |
940 | sbi->last_valid_block_count = sbi->total_valid_block_count; | |
941 | sbi->alloc_valid_block_count = 0; | |
942 | INIT_LIST_HEAD(&sbi->dir_inode_list); | |
943 | spin_lock_init(&sbi->dir_inode_lock); | |
944 | ||
aff063e2 JK |
945 | init_orphan_info(sbi); |
946 | ||
947 | /* setup f2fs internal modules */ | |
948 | err = build_segment_manager(sbi); | |
a07ef784 NJ |
949 | if (err) { |
950 | f2fs_msg(sb, KERN_ERR, | |
951 | "Failed to initialize F2FS segment manager"); | |
aff063e2 | 952 | goto free_sm; |
a07ef784 | 953 | } |
aff063e2 | 954 | err = build_node_manager(sbi); |
a07ef784 NJ |
955 | if (err) { |
956 | f2fs_msg(sb, KERN_ERR, | |
957 | "Failed to initialize F2FS node manager"); | |
aff063e2 | 958 | goto free_nm; |
a07ef784 | 959 | } |
aff063e2 JK |
960 | |
961 | build_gc_manager(sbi); | |
962 | ||
963 | /* get an inode for node space */ | |
964 | sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi)); | |
965 | if (IS_ERR(sbi->node_inode)) { | |
a07ef784 | 966 | f2fs_msg(sb, KERN_ERR, "Failed to read node inode"); |
aff063e2 JK |
967 | err = PTR_ERR(sbi->node_inode); |
968 | goto free_nm; | |
969 | } | |
970 | ||
971 | /* if there are nt orphan nodes free them */ | |
8f99a946 | 972 | recover_orphan_inodes(sbi); |
aff063e2 JK |
973 | |
974 | /* read root inode and dentry */ | |
975 | root = f2fs_iget(sb, F2FS_ROOT_INO(sbi)); | |
976 | if (IS_ERR(root)) { | |
a07ef784 | 977 | f2fs_msg(sb, KERN_ERR, "Failed to read root inode"); |
aff063e2 JK |
978 | err = PTR_ERR(root); |
979 | goto free_node_inode; | |
980 | } | |
8f99a946 CY |
981 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { |
982 | err = -EINVAL; | |
aff063e2 | 983 | goto free_root_inode; |
8f99a946 | 984 | } |
aff063e2 JK |
985 | |
986 | sb->s_root = d_make_root(root); /* allocate root dentry */ | |
987 | if (!sb->s_root) { | |
988 | err = -ENOMEM; | |
989 | goto free_root_inode; | |
990 | } | |
991 | ||
aff063e2 JK |
992 | err = f2fs_build_stats(sbi); |
993 | if (err) | |
6437d1b0 | 994 | goto free_root_inode; |
aff063e2 | 995 | |
5e176d54 JK |
996 | if (f2fs_proc_root) |
997 | sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root); | |
998 | ||
999 | if (sbi->s_proc) | |
1000 | proc_create_data("segment_info", S_IRUGO, sbi->s_proc, | |
1001 | &f2fs_seq_segment_info_fops, sb); | |
1002 | ||
d3ee456d NJ |
1003 | if (test_opt(sbi, DISCARD)) { |
1004 | struct request_queue *q = bdev_get_queue(sb->s_bdev); | |
1005 | if (!blk_queue_discard(q)) | |
1006 | f2fs_msg(sb, KERN_WARNING, | |
1007 | "mounting with \"discard\" option, but " | |
1008 | "the device does not support discard"); | |
1009 | } | |
1010 | ||
b59d0bae NJ |
1011 | sbi->s_kobj.kset = f2fs_kset; |
1012 | init_completion(&sbi->s_kobj_unregister); | |
1013 | err = kobject_init_and_add(&sbi->s_kobj, &f2fs_ktype, NULL, | |
1014 | "%s", sb->s_id); | |
1015 | if (err) | |
6437d1b0 | 1016 | goto free_proc; |
b59d0bae | 1017 | |
6437d1b0 JK |
1018 | /* recover fsynced data */ |
1019 | if (!test_opt(sbi, DISABLE_ROLL_FORWARD)) { | |
1020 | err = recover_fsync_data(sbi); | |
1021 | if (err) | |
1022 | f2fs_msg(sb, KERN_ERR, | |
1023 | "Cannot recover all fsync data errno=%ld", err); | |
1024 | } | |
1025 | ||
1026 | /* | |
1027 | * If filesystem is not mounted as read-only then | |
1028 | * do start the gc_thread. | |
1029 | */ | |
1030 | if (!(sb->s_flags & MS_RDONLY)) { | |
1031 | /* After POR, we can run background GC thread.*/ | |
1032 | err = start_gc_thread(sbi); | |
1033 | if (err) | |
1034 | goto free_kobj; | |
1035 | } | |
aff063e2 | 1036 | return 0; |
6437d1b0 JK |
1037 | |
1038 | free_kobj: | |
1039 | kobject_del(&sbi->s_kobj); | |
1040 | free_proc: | |
1d15bd20 CY |
1041 | if (sbi->s_proc) { |
1042 | remove_proc_entry("segment_info", sbi->s_proc); | |
1043 | remove_proc_entry(sb->s_id, f2fs_proc_root); | |
1044 | } | |
1045 | f2fs_destroy_stats(sbi); | |
aff063e2 JK |
1046 | free_root_inode: |
1047 | dput(sb->s_root); | |
1048 | sb->s_root = NULL; | |
1049 | free_node_inode: | |
1050 | iput(sbi->node_inode); | |
1051 | free_nm: | |
1052 | destroy_node_manager(sbi); | |
1053 | free_sm: | |
1054 | destroy_segment_manager(sbi); | |
1055 | free_cp: | |
1056 | kfree(sbi->ckpt); | |
1057 | free_meta_inode: | |
1058 | make_bad_inode(sbi->meta_inode); | |
1059 | iput(sbi->meta_inode); | |
1060 | free_sb_buf: | |
1061 | brelse(raw_super_buf); | |
1062 | free_sbi: | |
1063 | kfree(sbi); | |
1064 | return err; | |
1065 | } | |
1066 | ||
1067 | static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags, | |
1068 | const char *dev_name, void *data) | |
1069 | { | |
1070 | return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super); | |
1071 | } | |
1072 | ||
1073 | static struct file_system_type f2fs_fs_type = { | |
1074 | .owner = THIS_MODULE, | |
1075 | .name = "f2fs", | |
1076 | .mount = f2fs_mount, | |
1077 | .kill_sb = kill_block_super, | |
1078 | .fs_flags = FS_REQUIRES_DEV, | |
1079 | }; | |
7f78e035 | 1080 | MODULE_ALIAS_FS("f2fs"); |
aff063e2 | 1081 | |
6e6093a8 | 1082 | static int __init init_inodecache(void) |
aff063e2 JK |
1083 | { |
1084 | f2fs_inode_cachep = f2fs_kmem_cache_create("f2fs_inode_cache", | |
1085 | sizeof(struct f2fs_inode_info), NULL); | |
6bacf52f | 1086 | if (!f2fs_inode_cachep) |
aff063e2 JK |
1087 | return -ENOMEM; |
1088 | return 0; | |
1089 | } | |
1090 | ||
1091 | static void destroy_inodecache(void) | |
1092 | { | |
1093 | /* | |
1094 | * Make sure all delayed rcu free inodes are flushed before we | |
1095 | * destroy cache. | |
1096 | */ | |
1097 | rcu_barrier(); | |
1098 | kmem_cache_destroy(f2fs_inode_cachep); | |
1099 | } | |
1100 | ||
1101 | static int __init init_f2fs_fs(void) | |
1102 | { | |
1103 | int err; | |
1104 | ||
1105 | err = init_inodecache(); | |
1106 | if (err) | |
1107 | goto fail; | |
1108 | err = create_node_manager_caches(); | |
1109 | if (err) | |
9890ff3f | 1110 | goto free_inodecache; |
7fd9e544 | 1111 | err = create_segment_manager_caches(); |
aff063e2 | 1112 | if (err) |
9890ff3f | 1113 | goto free_node_manager_caches; |
7fd9e544 JK |
1114 | err = create_gc_caches(); |
1115 | if (err) | |
1116 | goto free_segment_manager_caches; | |
aff063e2 JK |
1117 | err = create_checkpoint_caches(); |
1118 | if (err) | |
9890ff3f | 1119 | goto free_gc_caches; |
b59d0bae | 1120 | f2fs_kset = kset_create_and_add("f2fs", NULL, fs_kobj); |
6e6b978c WY |
1121 | if (!f2fs_kset) { |
1122 | err = -ENOMEM; | |
9890ff3f | 1123 | goto free_checkpoint_caches; |
6e6b978c | 1124 | } |
4589d25d NJ |
1125 | err = register_filesystem(&f2fs_fs_type); |
1126 | if (err) | |
9890ff3f | 1127 | goto free_kset; |
4589d25d | 1128 | f2fs_create_root_stats(); |
5e176d54 | 1129 | f2fs_proc_root = proc_mkdir("fs/f2fs", NULL); |
9890ff3f ZH |
1130 | return 0; |
1131 | ||
1132 | free_kset: | |
1133 | kset_unregister(f2fs_kset); | |
1134 | free_checkpoint_caches: | |
1135 | destroy_checkpoint_caches(); | |
1136 | free_gc_caches: | |
1137 | destroy_gc_caches(); | |
7fd9e544 JK |
1138 | free_segment_manager_caches: |
1139 | destroy_segment_manager_caches(); | |
9890ff3f ZH |
1140 | free_node_manager_caches: |
1141 | destroy_node_manager_caches(); | |
1142 | free_inodecache: | |
1143 | destroy_inodecache(); | |
aff063e2 JK |
1144 | fail: |
1145 | return err; | |
1146 | } | |
1147 | ||
1148 | static void __exit exit_f2fs_fs(void) | |
1149 | { | |
5e176d54 | 1150 | remove_proc_entry("fs/f2fs", NULL); |
4589d25d | 1151 | f2fs_destroy_root_stats(); |
aff063e2 JK |
1152 | unregister_filesystem(&f2fs_fs_type); |
1153 | destroy_checkpoint_caches(); | |
1154 | destroy_gc_caches(); | |
5dcd8a71 | 1155 | destroy_segment_manager_caches(); |
aff063e2 JK |
1156 | destroy_node_manager_caches(); |
1157 | destroy_inodecache(); | |
b59d0bae | 1158 | kset_unregister(f2fs_kset); |
aff063e2 JK |
1159 | } |
1160 | ||
1161 | module_init(init_f2fs_fs) | |
1162 | module_exit(exit_f2fs_fs) | |
1163 | ||
1164 | MODULE_AUTHOR("Samsung Electronics's Praesto Team"); | |
1165 | MODULE_DESCRIPTION("Flash Friendly File System"); | |
1166 | MODULE_LICENSE("GPL"); |