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, |
aff063e2 JK |
53 | Opt_err, |
54 | }; | |
55 | ||
56 | static match_table_t f2fs_tokens = { | |
696c018c | 57 | {Opt_gc_background, "background_gc=%s"}, |
aff063e2 JK |
58 | {Opt_disable_roll_forward, "disable_roll_forward"}, |
59 | {Opt_discard, "discard"}, | |
60 | {Opt_noheap, "no_heap"}, | |
4058c511 | 61 | {Opt_user_xattr, "user_xattr"}, |
aff063e2 | 62 | {Opt_nouser_xattr, "nouser_xattr"}, |
4058c511 | 63 | {Opt_acl, "acl"}, |
aff063e2 JK |
64 | {Opt_noacl, "noacl"}, |
65 | {Opt_active_logs, "active_logs=%u"}, | |
66 | {Opt_disable_ext_identify, "disable_ext_identify"}, | |
444c580f | 67 | {Opt_inline_xattr, "inline_xattr"}, |
aff063e2 JK |
68 | {Opt_err, NULL}, |
69 | }; | |
70 | ||
b59d0bae | 71 | /* Sysfs support for f2fs */ |
ea91e9b0 JK |
72 | enum { |
73 | GC_THREAD, /* struct f2fs_gc_thread */ | |
74 | SM_INFO, /* struct f2fs_sm_info */ | |
75 | }; | |
76 | ||
b59d0bae NJ |
77 | struct f2fs_attr { |
78 | struct attribute attr; | |
79 | ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *); | |
80 | ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *, | |
81 | const char *, size_t); | |
ea91e9b0 | 82 | int struct_type; |
b59d0bae NJ |
83 | int offset; |
84 | }; | |
85 | ||
ea91e9b0 JK |
86 | static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type) |
87 | { | |
88 | if (struct_type == GC_THREAD) | |
89 | return (unsigned char *)sbi->gc_thread; | |
90 | else if (struct_type == SM_INFO) | |
91 | return (unsigned char *)SM_I(sbi); | |
92 | return NULL; | |
93 | } | |
94 | ||
b59d0bae NJ |
95 | static ssize_t f2fs_sbi_show(struct f2fs_attr *a, |
96 | struct f2fs_sb_info *sbi, char *buf) | |
97 | { | |
ea91e9b0 | 98 | unsigned char *ptr = NULL; |
b59d0bae NJ |
99 | unsigned int *ui; |
100 | ||
ea91e9b0 JK |
101 | ptr = __struct_ptr(sbi, a->struct_type); |
102 | if (!ptr) | |
b59d0bae NJ |
103 | return -EINVAL; |
104 | ||
ea91e9b0 | 105 | ui = (unsigned int *)(ptr + a->offset); |
b59d0bae NJ |
106 | |
107 | return snprintf(buf, PAGE_SIZE, "%u\n", *ui); | |
108 | } | |
109 | ||
110 | static ssize_t f2fs_sbi_store(struct f2fs_attr *a, | |
111 | struct f2fs_sb_info *sbi, | |
112 | const char *buf, size_t count) | |
113 | { | |
ea91e9b0 | 114 | unsigned char *ptr; |
b59d0bae NJ |
115 | unsigned long t; |
116 | unsigned int *ui; | |
117 | ssize_t ret; | |
118 | ||
ea91e9b0 JK |
119 | ptr = __struct_ptr(sbi, a->struct_type); |
120 | if (!ptr) | |
b59d0bae NJ |
121 | return -EINVAL; |
122 | ||
ea91e9b0 | 123 | ui = (unsigned int *)(ptr + a->offset); |
b59d0bae NJ |
124 | |
125 | ret = kstrtoul(skip_spaces(buf), 0, &t); | |
126 | if (ret < 0) | |
127 | return ret; | |
128 | *ui = t; | |
129 | return count; | |
130 | } | |
131 | ||
132 | static ssize_t f2fs_attr_show(struct kobject *kobj, | |
133 | struct attribute *attr, char *buf) | |
134 | { | |
135 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, | |
136 | s_kobj); | |
137 | struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); | |
138 | ||
139 | return a->show ? a->show(a, sbi, buf) : 0; | |
140 | } | |
141 | ||
142 | static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr, | |
143 | const char *buf, size_t len) | |
144 | { | |
145 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, | |
146 | s_kobj); | |
147 | struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); | |
148 | ||
149 | return a->store ? a->store(a, sbi, buf, len) : 0; | |
150 | } | |
151 | ||
152 | static void f2fs_sb_release(struct kobject *kobj) | |
153 | { | |
154 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, | |
155 | s_kobj); | |
156 | complete(&sbi->s_kobj_unregister); | |
157 | } | |
158 | ||
ea91e9b0 | 159 | #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \ |
b59d0bae NJ |
160 | static struct f2fs_attr f2fs_attr_##_name = { \ |
161 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
162 | .show = _show, \ | |
163 | .store = _store, \ | |
ea91e9b0 JK |
164 | .struct_type = _struct_type, \ |
165 | .offset = _offset \ | |
b59d0bae NJ |
166 | } |
167 | ||
ea91e9b0 JK |
168 | #define F2FS_RW_ATTR(struct_type, struct_name, name, elname) \ |
169 | F2FS_ATTR_OFFSET(struct_type, name, 0644, \ | |
170 | f2fs_sbi_show, f2fs_sbi_store, \ | |
171 | offsetof(struct struct_name, elname)) | |
b59d0bae | 172 | |
ea91e9b0 JK |
173 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time); |
174 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time); | |
175 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time); | |
176 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_idle, gc_idle); | |
177 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments); | |
7ac8c3b0 | 178 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, max_small_discards, max_discards); |
b59d0bae NJ |
179 | |
180 | #define ATTR_LIST(name) (&f2fs_attr_##name.attr) | |
181 | static struct attribute *f2fs_attrs[] = { | |
182 | ATTR_LIST(gc_min_sleep_time), | |
183 | ATTR_LIST(gc_max_sleep_time), | |
184 | ATTR_LIST(gc_no_gc_sleep_time), | |
d2dc095f | 185 | ATTR_LIST(gc_idle), |
ea91e9b0 | 186 | ATTR_LIST(reclaim_segments), |
7ac8c3b0 | 187 | ATTR_LIST(max_small_discards), |
b59d0bae NJ |
188 | NULL, |
189 | }; | |
190 | ||
191 | static const struct sysfs_ops f2fs_attr_ops = { | |
192 | .show = f2fs_attr_show, | |
193 | .store = f2fs_attr_store, | |
194 | }; | |
195 | ||
196 | static struct kobj_type f2fs_ktype = { | |
197 | .default_attrs = f2fs_attrs, | |
198 | .sysfs_ops = &f2fs_attr_ops, | |
199 | .release = f2fs_sb_release, | |
200 | }; | |
201 | ||
a07ef784 NJ |
202 | void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...) |
203 | { | |
204 | struct va_format vaf; | |
205 | va_list args; | |
206 | ||
207 | va_start(args, fmt); | |
208 | vaf.fmt = fmt; | |
209 | vaf.va = &args; | |
210 | printk("%sF2FS-fs (%s): %pV\n", level, sb->s_id, &vaf); | |
211 | va_end(args); | |
212 | } | |
213 | ||
aff063e2 JK |
214 | static void init_once(void *foo) |
215 | { | |
216 | struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo; | |
217 | ||
aff063e2 JK |
218 | inode_init_once(&fi->vfs_inode); |
219 | } | |
220 | ||
696c018c NJ |
221 | static int parse_options(struct super_block *sb, char *options) |
222 | { | |
223 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
224 | substring_t args[MAX_OPT_ARGS]; | |
225 | char *p, *name; | |
226 | int arg = 0; | |
227 | ||
228 | if (!options) | |
229 | return 0; | |
230 | ||
231 | while ((p = strsep(&options, ",")) != NULL) { | |
232 | int token; | |
233 | if (!*p) | |
234 | continue; | |
235 | /* | |
236 | * Initialize args struct so we know whether arg was | |
237 | * found; some options take optional arguments. | |
238 | */ | |
239 | args[0].to = args[0].from = NULL; | |
240 | token = match_token(p, f2fs_tokens, args); | |
241 | ||
242 | switch (token) { | |
243 | case Opt_gc_background: | |
244 | name = match_strdup(&args[0]); | |
245 | ||
246 | if (!name) | |
247 | return -ENOMEM; | |
248 | if (!strncmp(name, "on", 2)) | |
249 | set_opt(sbi, BG_GC); | |
250 | else if (!strncmp(name, "off", 3)) | |
251 | clear_opt(sbi, BG_GC); | |
252 | else { | |
253 | kfree(name); | |
254 | return -EINVAL; | |
255 | } | |
256 | kfree(name); | |
257 | break; | |
258 | case Opt_disable_roll_forward: | |
259 | set_opt(sbi, DISABLE_ROLL_FORWARD); | |
260 | break; | |
261 | case Opt_discard: | |
262 | set_opt(sbi, DISCARD); | |
263 | break; | |
264 | case Opt_noheap: | |
265 | set_opt(sbi, NOHEAP); | |
266 | break; | |
267 | #ifdef CONFIG_F2FS_FS_XATTR | |
4058c511 KA |
268 | case Opt_user_xattr: |
269 | set_opt(sbi, XATTR_USER); | |
270 | break; | |
696c018c NJ |
271 | case Opt_nouser_xattr: |
272 | clear_opt(sbi, XATTR_USER); | |
273 | break; | |
444c580f JK |
274 | case Opt_inline_xattr: |
275 | set_opt(sbi, INLINE_XATTR); | |
276 | break; | |
696c018c | 277 | #else |
4058c511 KA |
278 | case Opt_user_xattr: |
279 | f2fs_msg(sb, KERN_INFO, | |
280 | "user_xattr options not supported"); | |
281 | break; | |
696c018c NJ |
282 | case Opt_nouser_xattr: |
283 | f2fs_msg(sb, KERN_INFO, | |
284 | "nouser_xattr options not supported"); | |
285 | break; | |
444c580f JK |
286 | case Opt_inline_xattr: |
287 | f2fs_msg(sb, KERN_INFO, | |
288 | "inline_xattr options not supported"); | |
289 | break; | |
696c018c NJ |
290 | #endif |
291 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
4058c511 KA |
292 | case Opt_acl: |
293 | set_opt(sbi, POSIX_ACL); | |
294 | break; | |
696c018c NJ |
295 | case Opt_noacl: |
296 | clear_opt(sbi, POSIX_ACL); | |
297 | break; | |
298 | #else | |
4058c511 KA |
299 | case Opt_acl: |
300 | f2fs_msg(sb, KERN_INFO, "acl options not supported"); | |
301 | break; | |
696c018c NJ |
302 | case Opt_noacl: |
303 | f2fs_msg(sb, KERN_INFO, "noacl options not supported"); | |
304 | break; | |
305 | #endif | |
306 | case Opt_active_logs: | |
307 | if (args->from && match_int(args, &arg)) | |
308 | return -EINVAL; | |
309 | if (arg != 2 && arg != 4 && arg != NR_CURSEG_TYPE) | |
310 | return -EINVAL; | |
311 | sbi->active_logs = arg; | |
312 | break; | |
313 | case Opt_disable_ext_identify: | |
314 | set_opt(sbi, DISABLE_EXT_IDENTIFY); | |
315 | break; | |
316 | default: | |
317 | f2fs_msg(sb, KERN_ERR, | |
318 | "Unrecognized mount option \"%s\" or missing value", | |
319 | p); | |
320 | return -EINVAL; | |
321 | } | |
322 | } | |
323 | return 0; | |
324 | } | |
325 | ||
aff063e2 JK |
326 | static struct inode *f2fs_alloc_inode(struct super_block *sb) |
327 | { | |
328 | struct f2fs_inode_info *fi; | |
329 | ||
330 | fi = kmem_cache_alloc(f2fs_inode_cachep, GFP_NOFS | __GFP_ZERO); | |
331 | if (!fi) | |
332 | return NULL; | |
333 | ||
334 | init_once((void *) fi); | |
335 | ||
434720fa | 336 | /* Initialize f2fs-specific inode info */ |
aff063e2 JK |
337 | fi->vfs_inode.i_version = 1; |
338 | atomic_set(&fi->dirty_dents, 0); | |
339 | fi->i_current_depth = 1; | |
340 | fi->i_advise = 0; | |
341 | rwlock_init(&fi->ext.ext_lock); | |
342 | ||
343 | set_inode_flag(fi, FI_NEW_INODE); | |
344 | ||
444c580f JK |
345 | if (test_opt(F2FS_SB(sb), INLINE_XATTR)) |
346 | set_inode_flag(fi, FI_INLINE_XATTR); | |
347 | ||
aff063e2 JK |
348 | return &fi->vfs_inode; |
349 | } | |
350 | ||
531ad7d5 JK |
351 | static int f2fs_drop_inode(struct inode *inode) |
352 | { | |
353 | /* | |
354 | * This is to avoid a deadlock condition like below. | |
355 | * writeback_single_inode(inode) | |
356 | * - f2fs_write_data_page | |
357 | * - f2fs_gc -> iput -> evict | |
358 | * - inode_wait_for_writeback(inode) | |
359 | */ | |
360 | if (!inode_unhashed(inode) && inode->i_state & I_SYNC) | |
361 | return 0; | |
362 | return generic_drop_inode(inode); | |
363 | } | |
364 | ||
b3783873 JK |
365 | /* |
366 | * f2fs_dirty_inode() is called from __mark_inode_dirty() | |
367 | * | |
368 | * We should call set_dirty_inode to write the dirty inode through write_inode. | |
369 | */ | |
370 | static void f2fs_dirty_inode(struct inode *inode, int flags) | |
371 | { | |
372 | set_inode_flag(F2FS_I(inode), FI_DIRTY_INODE); | |
b3783873 JK |
373 | } |
374 | ||
aff063e2 JK |
375 | static void f2fs_i_callback(struct rcu_head *head) |
376 | { | |
377 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
378 | kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode)); | |
379 | } | |
380 | ||
25ca923b | 381 | static void f2fs_destroy_inode(struct inode *inode) |
aff063e2 JK |
382 | { |
383 | call_rcu(&inode->i_rcu, f2fs_i_callback); | |
384 | } | |
385 | ||
386 | static void f2fs_put_super(struct super_block *sb) | |
387 | { | |
388 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
389 | ||
5e176d54 JK |
390 | if (sbi->s_proc) { |
391 | remove_proc_entry("segment_info", sbi->s_proc); | |
392 | remove_proc_entry(sb->s_id, f2fs_proc_root); | |
393 | } | |
b59d0bae | 394 | kobject_del(&sbi->s_kobj); |
5e176d54 | 395 | |
aff063e2 JK |
396 | f2fs_destroy_stats(sbi); |
397 | stop_gc_thread(sbi); | |
398 | ||
5887d291 JK |
399 | /* We don't need to do checkpoint when it's clean */ |
400 | if (sbi->s_dirty && get_pages(sbi, F2FS_DIRTY_NODES)) | |
401 | write_checkpoint(sbi, true); | |
aff063e2 JK |
402 | |
403 | iput(sbi->node_inode); | |
404 | iput(sbi->meta_inode); | |
405 | ||
406 | /* destroy f2fs internal modules */ | |
407 | destroy_node_manager(sbi); | |
408 | destroy_segment_manager(sbi); | |
409 | ||
410 | kfree(sbi->ckpt); | |
b59d0bae NJ |
411 | kobject_put(&sbi->s_kobj); |
412 | wait_for_completion(&sbi->s_kobj_unregister); | |
aff063e2 JK |
413 | |
414 | sb->s_fs_info = NULL; | |
415 | brelse(sbi->raw_super_buf); | |
416 | kfree(sbi); | |
417 | } | |
418 | ||
419 | int f2fs_sync_fs(struct super_block *sb, int sync) | |
420 | { | |
421 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
aff063e2 | 422 | |
a2a4a7e4 NJ |
423 | trace_f2fs_sync_fs(sb, sync); |
424 | ||
aff063e2 JK |
425 | if (!sbi->s_dirty && !get_pages(sbi, F2FS_DIRTY_NODES)) |
426 | return 0; | |
427 | ||
b7473754 JK |
428 | if (sync) { |
429 | mutex_lock(&sbi->gc_mutex); | |
43727527 | 430 | write_checkpoint(sbi, false); |
b7473754 JK |
431 | mutex_unlock(&sbi->gc_mutex); |
432 | } else { | |
7d82db83 | 433 | f2fs_balance_fs(sbi); |
b7473754 | 434 | } |
aff063e2 | 435 | |
64c576fe | 436 | return 0; |
aff063e2 JK |
437 | } |
438 | ||
d6212a5f CL |
439 | static int f2fs_freeze(struct super_block *sb) |
440 | { | |
441 | int err; | |
442 | ||
77888c1e | 443 | if (f2fs_readonly(sb)) |
d6212a5f CL |
444 | return 0; |
445 | ||
446 | err = f2fs_sync_fs(sb, 1); | |
447 | return err; | |
448 | } | |
449 | ||
450 | static int f2fs_unfreeze(struct super_block *sb) | |
451 | { | |
452 | return 0; | |
453 | } | |
454 | ||
aff063e2 JK |
455 | static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf) |
456 | { | |
457 | struct super_block *sb = dentry->d_sb; | |
458 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
459 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); | |
460 | block_t total_count, user_block_count, start_count, ovp_count; | |
461 | ||
462 | total_count = le64_to_cpu(sbi->raw_super->block_count); | |
463 | user_block_count = sbi->user_block_count; | |
464 | start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr); | |
465 | ovp_count = SM_I(sbi)->ovp_segments << sbi->log_blocks_per_seg; | |
466 | buf->f_type = F2FS_SUPER_MAGIC; | |
467 | buf->f_bsize = sbi->blocksize; | |
468 | ||
469 | buf->f_blocks = total_count - start_count; | |
470 | buf->f_bfree = buf->f_blocks - valid_user_blocks(sbi) - ovp_count; | |
471 | buf->f_bavail = user_block_count - valid_user_blocks(sbi); | |
472 | ||
1362b5e3 JK |
473 | buf->f_files = sbi->total_node_count; |
474 | buf->f_ffree = sbi->total_node_count - valid_inode_count(sbi); | |
aff063e2 | 475 | |
5a20d339 | 476 | buf->f_namelen = F2FS_NAME_LEN; |
aff063e2 JK |
477 | buf->f_fsid.val[0] = (u32)id; |
478 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
479 | ||
480 | return 0; | |
481 | } | |
482 | ||
483 | static int f2fs_show_options(struct seq_file *seq, struct dentry *root) | |
484 | { | |
485 | struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb); | |
486 | ||
696c018c NJ |
487 | if (!(root->d_sb->s_flags & MS_RDONLY) && test_opt(sbi, BG_GC)) |
488 | seq_printf(seq, ",background_gc=%s", "on"); | |
aff063e2 | 489 | else |
696c018c | 490 | seq_printf(seq, ",background_gc=%s", "off"); |
aff063e2 JK |
491 | if (test_opt(sbi, DISABLE_ROLL_FORWARD)) |
492 | seq_puts(seq, ",disable_roll_forward"); | |
493 | if (test_opt(sbi, DISCARD)) | |
494 | seq_puts(seq, ",discard"); | |
495 | if (test_opt(sbi, NOHEAP)) | |
496 | seq_puts(seq, ",no_heap_alloc"); | |
497 | #ifdef CONFIG_F2FS_FS_XATTR | |
498 | if (test_opt(sbi, XATTR_USER)) | |
499 | seq_puts(seq, ",user_xattr"); | |
500 | else | |
501 | seq_puts(seq, ",nouser_xattr"); | |
444c580f JK |
502 | if (test_opt(sbi, INLINE_XATTR)) |
503 | seq_puts(seq, ",inline_xattr"); | |
aff063e2 JK |
504 | #endif |
505 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
506 | if (test_opt(sbi, POSIX_ACL)) | |
507 | seq_puts(seq, ",acl"); | |
508 | else | |
509 | seq_puts(seq, ",noacl"); | |
510 | #endif | |
511 | if (test_opt(sbi, DISABLE_EXT_IDENTIFY)) | |
aa43507f | 512 | seq_puts(seq, ",disable_ext_identify"); |
aff063e2 JK |
513 | |
514 | seq_printf(seq, ",active_logs=%u", sbi->active_logs); | |
515 | ||
516 | return 0; | |
517 | } | |
518 | ||
5e176d54 JK |
519 | static int segment_info_seq_show(struct seq_file *seq, void *offset) |
520 | { | |
521 | struct super_block *sb = seq->private; | |
522 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
523 | unsigned int total_segs = le32_to_cpu(sbi->raw_super->segment_count_main); | |
524 | int i; | |
525 | ||
526 | for (i = 0; i < total_segs; i++) { | |
527 | seq_printf(seq, "%u", get_valid_blocks(sbi, i, 1)); | |
528 | if (i != 0 && (i % 10) == 0) | |
529 | seq_puts(seq, "\n"); | |
530 | else | |
531 | seq_puts(seq, " "); | |
532 | } | |
533 | return 0; | |
534 | } | |
535 | ||
536 | static int segment_info_open_fs(struct inode *inode, struct file *file) | |
537 | { | |
538 | return single_open(file, segment_info_seq_show, PDE_DATA(inode)); | |
539 | } | |
540 | ||
541 | static const struct file_operations f2fs_seq_segment_info_fops = { | |
542 | .owner = THIS_MODULE, | |
543 | .open = segment_info_open_fs, | |
544 | .read = seq_read, | |
545 | .llseek = seq_lseek, | |
546 | .release = single_release, | |
547 | }; | |
548 | ||
696c018c NJ |
549 | static int f2fs_remount(struct super_block *sb, int *flags, char *data) |
550 | { | |
551 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
552 | struct f2fs_mount_info org_mount_opt; | |
553 | int err, active_logs; | |
554 | ||
555 | /* | |
556 | * Save the old mount options in case we | |
557 | * need to restore them. | |
558 | */ | |
559 | org_mount_opt = sbi->mount_opt; | |
560 | active_logs = sbi->active_logs; | |
561 | ||
562 | /* parse mount options */ | |
563 | err = parse_options(sb, data); | |
564 | if (err) | |
565 | goto restore_opts; | |
566 | ||
567 | /* | |
568 | * Previous and new state of filesystem is RO, | |
569 | * so no point in checking GC conditions. | |
570 | */ | |
571 | if ((sb->s_flags & MS_RDONLY) && (*flags & MS_RDONLY)) | |
572 | goto skip; | |
573 | ||
574 | /* | |
575 | * We stop the GC thread if FS is mounted as RO | |
576 | * or if background_gc = off is passed in mount | |
577 | * option. Also sync the filesystem. | |
578 | */ | |
579 | if ((*flags & MS_RDONLY) || !test_opt(sbi, BG_GC)) { | |
580 | if (sbi->gc_thread) { | |
581 | stop_gc_thread(sbi); | |
582 | f2fs_sync_fs(sb, 1); | |
583 | } | |
584 | } else if (test_opt(sbi, BG_GC) && !sbi->gc_thread) { | |
585 | err = start_gc_thread(sbi); | |
586 | if (err) | |
587 | goto restore_opts; | |
588 | } | |
589 | skip: | |
590 | /* Update the POSIXACL Flag */ | |
591 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
592 | (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0); | |
593 | return 0; | |
594 | ||
595 | restore_opts: | |
596 | sbi->mount_opt = org_mount_opt; | |
597 | sbi->active_logs = active_logs; | |
598 | return err; | |
599 | } | |
600 | ||
aff063e2 JK |
601 | static struct super_operations f2fs_sops = { |
602 | .alloc_inode = f2fs_alloc_inode, | |
531ad7d5 | 603 | .drop_inode = f2fs_drop_inode, |
aff063e2 JK |
604 | .destroy_inode = f2fs_destroy_inode, |
605 | .write_inode = f2fs_write_inode, | |
b3783873 | 606 | .dirty_inode = f2fs_dirty_inode, |
aff063e2 JK |
607 | .show_options = f2fs_show_options, |
608 | .evict_inode = f2fs_evict_inode, | |
609 | .put_super = f2fs_put_super, | |
610 | .sync_fs = f2fs_sync_fs, | |
d6212a5f CL |
611 | .freeze_fs = f2fs_freeze, |
612 | .unfreeze_fs = f2fs_unfreeze, | |
aff063e2 | 613 | .statfs = f2fs_statfs, |
696c018c | 614 | .remount_fs = f2fs_remount, |
aff063e2 JK |
615 | }; |
616 | ||
617 | static struct inode *f2fs_nfs_get_inode(struct super_block *sb, | |
618 | u64 ino, u32 generation) | |
619 | { | |
620 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
621 | struct inode *inode; | |
622 | ||
623 | if (ino < F2FS_ROOT_INO(sbi)) | |
624 | return ERR_PTR(-ESTALE); | |
625 | ||
626 | /* | |
627 | * f2fs_iget isn't quite right if the inode is currently unallocated! | |
628 | * However f2fs_iget currently does appropriate checks to handle stale | |
629 | * inodes so everything is OK. | |
630 | */ | |
631 | inode = f2fs_iget(sb, ino); | |
632 | if (IS_ERR(inode)) | |
633 | return ERR_CAST(inode); | |
634 | if (generation && inode->i_generation != generation) { | |
635 | /* we didn't find the right inode.. */ | |
636 | iput(inode); | |
637 | return ERR_PTR(-ESTALE); | |
638 | } | |
639 | return inode; | |
640 | } | |
641 | ||
642 | static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
643 | int fh_len, int fh_type) | |
644 | { | |
645 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
646 | f2fs_nfs_get_inode); | |
647 | } | |
648 | ||
649 | static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid, | |
650 | int fh_len, int fh_type) | |
651 | { | |
652 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
653 | f2fs_nfs_get_inode); | |
654 | } | |
655 | ||
656 | static const struct export_operations f2fs_export_ops = { | |
657 | .fh_to_dentry = f2fs_fh_to_dentry, | |
658 | .fh_to_parent = f2fs_fh_to_parent, | |
659 | .get_parent = f2fs_get_parent, | |
660 | }; | |
661 | ||
aff063e2 JK |
662 | static loff_t max_file_size(unsigned bits) |
663 | { | |
de93653f | 664 | loff_t result = (DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS); |
aff063e2 JK |
665 | loff_t leaf_count = ADDRS_PER_BLOCK; |
666 | ||
667 | /* two direct node blocks */ | |
668 | result += (leaf_count * 2); | |
669 | ||
670 | /* two indirect node blocks */ | |
671 | leaf_count *= NIDS_PER_BLOCK; | |
672 | result += (leaf_count * 2); | |
673 | ||
674 | /* one double indirect node block */ | |
675 | leaf_count *= NIDS_PER_BLOCK; | |
676 | result += leaf_count; | |
677 | ||
678 | result <<= bits; | |
679 | return result; | |
680 | } | |
681 | ||
a07ef784 NJ |
682 | static int sanity_check_raw_super(struct super_block *sb, |
683 | struct f2fs_super_block *raw_super) | |
aff063e2 JK |
684 | { |
685 | unsigned int blocksize; | |
686 | ||
a07ef784 NJ |
687 | if (F2FS_SUPER_MAGIC != le32_to_cpu(raw_super->magic)) { |
688 | f2fs_msg(sb, KERN_INFO, | |
689 | "Magic Mismatch, valid(0x%x) - read(0x%x)", | |
690 | F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic)); | |
aff063e2 | 691 | return 1; |
a07ef784 | 692 | } |
aff063e2 | 693 | |
5c9b4692 | 694 | /* Currently, support only 4KB page cache size */ |
695 | if (F2FS_BLKSIZE != PAGE_CACHE_SIZE) { | |
696 | f2fs_msg(sb, KERN_INFO, | |
14d7e9de | 697 | "Invalid page_cache_size (%lu), supports only 4KB\n", |
5c9b4692 | 698 | PAGE_CACHE_SIZE); |
699 | return 1; | |
700 | } | |
701 | ||
aff063e2 JK |
702 | /* Currently, support only 4KB block size */ |
703 | blocksize = 1 << le32_to_cpu(raw_super->log_blocksize); | |
5c9b4692 | 704 | if (blocksize != F2FS_BLKSIZE) { |
a07ef784 NJ |
705 | f2fs_msg(sb, KERN_INFO, |
706 | "Invalid blocksize (%u), supports only 4KB\n", | |
707 | blocksize); | |
aff063e2 | 708 | return 1; |
a07ef784 | 709 | } |
5c9b4692 | 710 | |
aff063e2 | 711 | if (le32_to_cpu(raw_super->log_sectorsize) != |
a07ef784 NJ |
712 | F2FS_LOG_SECTOR_SIZE) { |
713 | f2fs_msg(sb, KERN_INFO, "Invalid log sectorsize"); | |
aff063e2 | 714 | return 1; |
a07ef784 | 715 | } |
aff063e2 | 716 | if (le32_to_cpu(raw_super->log_sectors_per_block) != |
a07ef784 NJ |
717 | F2FS_LOG_SECTORS_PER_BLOCK) { |
718 | f2fs_msg(sb, KERN_INFO, "Invalid log sectors per block"); | |
aff063e2 | 719 | return 1; |
a07ef784 | 720 | } |
aff063e2 JK |
721 | return 0; |
722 | } | |
723 | ||
577e3495 | 724 | static int sanity_check_ckpt(struct f2fs_sb_info *sbi) |
aff063e2 JK |
725 | { |
726 | unsigned int total, fsmeta; | |
577e3495 JK |
727 | struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); |
728 | struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); | |
aff063e2 JK |
729 | |
730 | total = le32_to_cpu(raw_super->segment_count); | |
731 | fsmeta = le32_to_cpu(raw_super->segment_count_ckpt); | |
732 | fsmeta += le32_to_cpu(raw_super->segment_count_sit); | |
733 | fsmeta += le32_to_cpu(raw_super->segment_count_nat); | |
734 | fsmeta += le32_to_cpu(ckpt->rsvd_segment_count); | |
735 | fsmeta += le32_to_cpu(raw_super->segment_count_ssa); | |
736 | ||
737 | if (fsmeta >= total) | |
738 | return 1; | |
577e3495 JK |
739 | |
740 | if (is_set_ckpt_flags(ckpt, CP_ERROR_FLAG)) { | |
741 | f2fs_msg(sbi->sb, KERN_ERR, "A bug case: need to run fsck"); | |
742 | return 1; | |
743 | } | |
aff063e2 JK |
744 | return 0; |
745 | } | |
746 | ||
747 | static void init_sb_info(struct f2fs_sb_info *sbi) | |
748 | { | |
749 | struct f2fs_super_block *raw_super = sbi->raw_super; | |
750 | int i; | |
751 | ||
752 | sbi->log_sectors_per_block = | |
753 | le32_to_cpu(raw_super->log_sectors_per_block); | |
754 | sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize); | |
755 | sbi->blocksize = 1 << sbi->log_blocksize; | |
756 | sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg); | |
757 | sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg; | |
758 | sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec); | |
759 | sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone); | |
760 | sbi->total_sections = le32_to_cpu(raw_super->section_count); | |
761 | sbi->total_node_count = | |
762 | (le32_to_cpu(raw_super->segment_count_nat) / 2) | |
763 | * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK; | |
764 | sbi->root_ino_num = le32_to_cpu(raw_super->root_ino); | |
765 | sbi->node_ino_num = le32_to_cpu(raw_super->node_ino); | |
766 | sbi->meta_ino_num = le32_to_cpu(raw_super->meta_ino); | |
5ec4e49f | 767 | sbi->cur_victim_sec = NULL_SECNO; |
aff063e2 JK |
768 | |
769 | for (i = 0; i < NR_COUNT_TYPE; i++) | |
770 | atomic_set(&sbi->nr_pages[i], 0); | |
771 | } | |
772 | ||
9076a75f GZ |
773 | /* |
774 | * Read f2fs raw super block. | |
775 | * Because we have two copies of super block, so read the first one at first, | |
776 | * if the first one is invalid, move to read the second one. | |
777 | */ | |
778 | static int read_raw_super_block(struct super_block *sb, | |
779 | struct f2fs_super_block **raw_super, | |
780 | struct buffer_head **raw_super_buf) | |
14d7e9de | 781 | { |
9076a75f | 782 | int block = 0; |
14d7e9de | 783 | |
9076a75f | 784 | retry: |
14d7e9de | 785 | *raw_super_buf = sb_bread(sb, block); |
786 | if (!*raw_super_buf) { | |
9076a75f GZ |
787 | f2fs_msg(sb, KERN_ERR, "Unable to read %dth superblock", |
788 | block + 1); | |
789 | if (block == 0) { | |
790 | block++; | |
791 | goto retry; | |
792 | } else { | |
793 | return -EIO; | |
794 | } | |
14d7e9de | 795 | } |
796 | ||
797 | *raw_super = (struct f2fs_super_block *) | |
798 | ((char *)(*raw_super_buf)->b_data + F2FS_SUPER_OFFSET); | |
799 | ||
800 | /* sanity checking of raw super */ | |
9076a75f GZ |
801 | if (sanity_check_raw_super(sb, *raw_super)) { |
802 | brelse(*raw_super_buf); | |
803 | f2fs_msg(sb, KERN_ERR, "Can't find a valid F2FS filesystem " | |
804 | "in %dth superblock", block + 1); | |
805 | if(block == 0) { | |
806 | block++; | |
807 | goto retry; | |
808 | } else { | |
809 | return -EINVAL; | |
810 | } | |
811 | } | |
14d7e9de | 812 | |
9076a75f | 813 | return 0; |
14d7e9de | 814 | } |
815 | ||
aff063e2 JK |
816 | static int f2fs_fill_super(struct super_block *sb, void *data, int silent) |
817 | { | |
818 | struct f2fs_sb_info *sbi; | |
819 | struct f2fs_super_block *raw_super; | |
820 | struct buffer_head *raw_super_buf; | |
821 | struct inode *root; | |
822 | long err = -EINVAL; | |
aff063e2 JK |
823 | |
824 | /* allocate memory for f2fs-specific super block info */ | |
825 | sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL); | |
826 | if (!sbi) | |
827 | return -ENOMEM; | |
828 | ||
ff9234ad | 829 | /* set a block size */ |
a07ef784 NJ |
830 | if (!sb_set_blocksize(sb, F2FS_BLKSIZE)) { |
831 | f2fs_msg(sb, KERN_ERR, "unable to set blocksize"); | |
aff063e2 | 832 | goto free_sbi; |
a07ef784 | 833 | } |
aff063e2 | 834 | |
9076a75f GZ |
835 | err = read_raw_super_block(sb, &raw_super, &raw_super_buf); |
836 | if (err) | |
837 | goto free_sbi; | |
838 | ||
5fb08372 | 839 | sb->s_fs_info = sbi; |
aff063e2 JK |
840 | /* init some FS parameters */ |
841 | sbi->active_logs = NR_CURSEG_TYPE; | |
842 | ||
843 | set_opt(sbi, BG_GC); | |
844 | ||
845 | #ifdef CONFIG_F2FS_FS_XATTR | |
846 | set_opt(sbi, XATTR_USER); | |
847 | #endif | |
848 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
849 | set_opt(sbi, POSIX_ACL); | |
850 | #endif | |
851 | /* parse mount options */ | |
5fb08372 | 852 | err = parse_options(sb, (char *)data); |
66348b72 | 853 | if (err) |
aff063e2 JK |
854 | goto free_sb_buf; |
855 | ||
25ca923b | 856 | sb->s_maxbytes = max_file_size(le32_to_cpu(raw_super->log_blocksize)); |
aff063e2 JK |
857 | sb->s_max_links = F2FS_LINK_MAX; |
858 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
859 | ||
860 | sb->s_op = &f2fs_sops; | |
861 | sb->s_xattr = f2fs_xattr_handlers; | |
862 | sb->s_export_op = &f2fs_export_ops; | |
863 | sb->s_magic = F2FS_SUPER_MAGIC; | |
aff063e2 JK |
864 | sb->s_time_gran = 1; |
865 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
866 | (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0); | |
867 | memcpy(sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid)); | |
868 | ||
869 | /* init f2fs-specific super block info */ | |
870 | sbi->sb = sb; | |
871 | sbi->raw_super = raw_super; | |
872 | sbi->raw_super_buf = raw_super_buf; | |
873 | mutex_init(&sbi->gc_mutex); | |
aff063e2 JK |
874 | mutex_init(&sbi->writepages); |
875 | mutex_init(&sbi->cp_mutex); | |
39936837 | 876 | mutex_init(&sbi->node_write); |
aabe5136 | 877 | sbi->por_doing = false; |
aff063e2 JK |
878 | spin_lock_init(&sbi->stat_lock); |
879 | init_rwsem(&sbi->bio_sem); | |
e479556b | 880 | init_rwsem(&sbi->cp_rwsem); |
fb51b5ef | 881 | init_waitqueue_head(&sbi->cp_wait); |
aff063e2 JK |
882 | init_sb_info(sbi); |
883 | ||
884 | /* get an inode for meta space */ | |
885 | sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi)); | |
886 | if (IS_ERR(sbi->meta_inode)) { | |
a07ef784 | 887 | f2fs_msg(sb, KERN_ERR, "Failed to read F2FS meta data inode"); |
aff063e2 JK |
888 | err = PTR_ERR(sbi->meta_inode); |
889 | goto free_sb_buf; | |
890 | } | |
891 | ||
892 | err = get_valid_checkpoint(sbi); | |
a07ef784 NJ |
893 | if (err) { |
894 | f2fs_msg(sb, KERN_ERR, "Failed to get valid F2FS checkpoint"); | |
aff063e2 | 895 | goto free_meta_inode; |
a07ef784 | 896 | } |
aff063e2 JK |
897 | |
898 | /* sanity checking of checkpoint */ | |
899 | err = -EINVAL; | |
577e3495 | 900 | if (sanity_check_ckpt(sbi)) { |
a07ef784 | 901 | f2fs_msg(sb, KERN_ERR, "Invalid F2FS checkpoint"); |
aff063e2 | 902 | goto free_cp; |
a07ef784 | 903 | } |
aff063e2 JK |
904 | |
905 | sbi->total_valid_node_count = | |
906 | le32_to_cpu(sbi->ckpt->valid_node_count); | |
907 | sbi->total_valid_inode_count = | |
908 | le32_to_cpu(sbi->ckpt->valid_inode_count); | |
909 | sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count); | |
910 | sbi->total_valid_block_count = | |
911 | le64_to_cpu(sbi->ckpt->valid_block_count); | |
912 | sbi->last_valid_block_count = sbi->total_valid_block_count; | |
913 | sbi->alloc_valid_block_count = 0; | |
914 | INIT_LIST_HEAD(&sbi->dir_inode_list); | |
915 | spin_lock_init(&sbi->dir_inode_lock); | |
916 | ||
aff063e2 JK |
917 | init_orphan_info(sbi); |
918 | ||
919 | /* setup f2fs internal modules */ | |
920 | err = build_segment_manager(sbi); | |
a07ef784 NJ |
921 | if (err) { |
922 | f2fs_msg(sb, KERN_ERR, | |
923 | "Failed to initialize F2FS segment manager"); | |
aff063e2 | 924 | goto free_sm; |
a07ef784 | 925 | } |
aff063e2 | 926 | err = build_node_manager(sbi); |
a07ef784 NJ |
927 | if (err) { |
928 | f2fs_msg(sb, KERN_ERR, | |
929 | "Failed to initialize F2FS node manager"); | |
aff063e2 | 930 | goto free_nm; |
a07ef784 | 931 | } |
aff063e2 JK |
932 | |
933 | build_gc_manager(sbi); | |
934 | ||
935 | /* get an inode for node space */ | |
936 | sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi)); | |
937 | if (IS_ERR(sbi->node_inode)) { | |
a07ef784 | 938 | f2fs_msg(sb, KERN_ERR, "Failed to read node inode"); |
aff063e2 JK |
939 | err = PTR_ERR(sbi->node_inode); |
940 | goto free_nm; | |
941 | } | |
942 | ||
943 | /* if there are nt orphan nodes free them */ | |
944 | err = -EINVAL; | |
30f0c758 | 945 | if (recover_orphan_inodes(sbi)) |
aff063e2 JK |
946 | goto free_node_inode; |
947 | ||
948 | /* read root inode and dentry */ | |
949 | root = f2fs_iget(sb, F2FS_ROOT_INO(sbi)); | |
950 | if (IS_ERR(root)) { | |
a07ef784 | 951 | f2fs_msg(sb, KERN_ERR, "Failed to read root inode"); |
aff063e2 JK |
952 | err = PTR_ERR(root); |
953 | goto free_node_inode; | |
954 | } | |
955 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) | |
956 | goto free_root_inode; | |
957 | ||
958 | sb->s_root = d_make_root(root); /* allocate root dentry */ | |
959 | if (!sb->s_root) { | |
960 | err = -ENOMEM; | |
961 | goto free_root_inode; | |
962 | } | |
963 | ||
964 | /* recover fsynced data */ | |
6ead1142 JK |
965 | if (!test_opt(sbi, DISABLE_ROLL_FORWARD)) { |
966 | err = recover_fsync_data(sbi); | |
bde582b2 CF |
967 | if (err) |
968 | f2fs_msg(sb, KERN_ERR, | |
969 | "Cannot recover all fsync data errno=%ld", err); | |
6ead1142 | 970 | } |
aff063e2 | 971 | |
696c018c NJ |
972 | /* |
973 | * If filesystem is not mounted as read-only then | |
974 | * do start the gc_thread. | |
975 | */ | |
976 | if (!(sb->s_flags & MS_RDONLY)) { | |
977 | /* After POR, we can run background GC thread.*/ | |
978 | err = start_gc_thread(sbi); | |
979 | if (err) | |
1d15bd20 | 980 | goto free_gc; |
696c018c | 981 | } |
aff063e2 JK |
982 | |
983 | err = f2fs_build_stats(sbi); | |
984 | if (err) | |
1d15bd20 | 985 | goto free_gc; |
aff063e2 | 986 | |
5e176d54 JK |
987 | if (f2fs_proc_root) |
988 | sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root); | |
989 | ||
990 | if (sbi->s_proc) | |
991 | proc_create_data("segment_info", S_IRUGO, sbi->s_proc, | |
992 | &f2fs_seq_segment_info_fops, sb); | |
993 | ||
d3ee456d NJ |
994 | if (test_opt(sbi, DISCARD)) { |
995 | struct request_queue *q = bdev_get_queue(sb->s_bdev); | |
996 | if (!blk_queue_discard(q)) | |
997 | f2fs_msg(sb, KERN_WARNING, | |
998 | "mounting with \"discard\" option, but " | |
999 | "the device does not support discard"); | |
1000 | } | |
1001 | ||
b59d0bae NJ |
1002 | sbi->s_kobj.kset = f2fs_kset; |
1003 | init_completion(&sbi->s_kobj_unregister); | |
1004 | err = kobject_init_and_add(&sbi->s_kobj, &f2fs_ktype, NULL, | |
1005 | "%s", sb->s_id); | |
1006 | if (err) | |
1007 | goto fail; | |
1008 | ||
aff063e2 JK |
1009 | return 0; |
1010 | fail: | |
1d15bd20 CY |
1011 | if (sbi->s_proc) { |
1012 | remove_proc_entry("segment_info", sbi->s_proc); | |
1013 | remove_proc_entry(sb->s_id, f2fs_proc_root); | |
1014 | } | |
1015 | f2fs_destroy_stats(sbi); | |
1016 | free_gc: | |
aff063e2 JK |
1017 | stop_gc_thread(sbi); |
1018 | free_root_inode: | |
1019 | dput(sb->s_root); | |
1020 | sb->s_root = NULL; | |
1021 | free_node_inode: | |
1022 | iput(sbi->node_inode); | |
1023 | free_nm: | |
1024 | destroy_node_manager(sbi); | |
1025 | free_sm: | |
1026 | destroy_segment_manager(sbi); | |
1027 | free_cp: | |
1028 | kfree(sbi->ckpt); | |
1029 | free_meta_inode: | |
1030 | make_bad_inode(sbi->meta_inode); | |
1031 | iput(sbi->meta_inode); | |
1032 | free_sb_buf: | |
1033 | brelse(raw_super_buf); | |
1034 | free_sbi: | |
1035 | kfree(sbi); | |
1036 | return err; | |
1037 | } | |
1038 | ||
1039 | static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags, | |
1040 | const char *dev_name, void *data) | |
1041 | { | |
1042 | return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super); | |
1043 | } | |
1044 | ||
1045 | static struct file_system_type f2fs_fs_type = { | |
1046 | .owner = THIS_MODULE, | |
1047 | .name = "f2fs", | |
1048 | .mount = f2fs_mount, | |
1049 | .kill_sb = kill_block_super, | |
1050 | .fs_flags = FS_REQUIRES_DEV, | |
1051 | }; | |
7f78e035 | 1052 | MODULE_ALIAS_FS("f2fs"); |
aff063e2 | 1053 | |
6e6093a8 | 1054 | static int __init init_inodecache(void) |
aff063e2 JK |
1055 | { |
1056 | f2fs_inode_cachep = f2fs_kmem_cache_create("f2fs_inode_cache", | |
1057 | sizeof(struct f2fs_inode_info), NULL); | |
1058 | if (f2fs_inode_cachep == NULL) | |
1059 | return -ENOMEM; | |
1060 | return 0; | |
1061 | } | |
1062 | ||
1063 | static void destroy_inodecache(void) | |
1064 | { | |
1065 | /* | |
1066 | * Make sure all delayed rcu free inodes are flushed before we | |
1067 | * destroy cache. | |
1068 | */ | |
1069 | rcu_barrier(); | |
1070 | kmem_cache_destroy(f2fs_inode_cachep); | |
1071 | } | |
1072 | ||
1073 | static int __init init_f2fs_fs(void) | |
1074 | { | |
1075 | int err; | |
1076 | ||
1077 | err = init_inodecache(); | |
1078 | if (err) | |
1079 | goto fail; | |
1080 | err = create_node_manager_caches(); | |
1081 | if (err) | |
9890ff3f | 1082 | goto free_inodecache; |
7fd9e544 | 1083 | err = create_segment_manager_caches(); |
aff063e2 | 1084 | if (err) |
9890ff3f | 1085 | goto free_node_manager_caches; |
7fd9e544 JK |
1086 | err = create_gc_caches(); |
1087 | if (err) | |
1088 | goto free_segment_manager_caches; | |
aff063e2 JK |
1089 | err = create_checkpoint_caches(); |
1090 | if (err) | |
9890ff3f | 1091 | goto free_gc_caches; |
b59d0bae | 1092 | f2fs_kset = kset_create_and_add("f2fs", NULL, fs_kobj); |
6e6b978c WY |
1093 | if (!f2fs_kset) { |
1094 | err = -ENOMEM; | |
9890ff3f | 1095 | goto free_checkpoint_caches; |
6e6b978c | 1096 | } |
4589d25d NJ |
1097 | err = register_filesystem(&f2fs_fs_type); |
1098 | if (err) | |
9890ff3f | 1099 | goto free_kset; |
4589d25d | 1100 | f2fs_create_root_stats(); |
5e176d54 | 1101 | f2fs_proc_root = proc_mkdir("fs/f2fs", NULL); |
9890ff3f ZH |
1102 | return 0; |
1103 | ||
1104 | free_kset: | |
1105 | kset_unregister(f2fs_kset); | |
1106 | free_checkpoint_caches: | |
1107 | destroy_checkpoint_caches(); | |
1108 | free_gc_caches: | |
1109 | destroy_gc_caches(); | |
7fd9e544 JK |
1110 | free_segment_manager_caches: |
1111 | destroy_segment_manager_caches(); | |
9890ff3f ZH |
1112 | free_node_manager_caches: |
1113 | destroy_node_manager_caches(); | |
1114 | free_inodecache: | |
1115 | destroy_inodecache(); | |
aff063e2 JK |
1116 | fail: |
1117 | return err; | |
1118 | } | |
1119 | ||
1120 | static void __exit exit_f2fs_fs(void) | |
1121 | { | |
5e176d54 | 1122 | remove_proc_entry("fs/f2fs", NULL); |
4589d25d | 1123 | f2fs_destroy_root_stats(); |
aff063e2 JK |
1124 | unregister_filesystem(&f2fs_fs_type); |
1125 | destroy_checkpoint_caches(); | |
1126 | destroy_gc_caches(); | |
1127 | destroy_node_manager_caches(); | |
1128 | destroy_inodecache(); | |
b59d0bae | 1129 | kset_unregister(f2fs_kset); |
aff063e2 JK |
1130 | } |
1131 | ||
1132 | module_init(init_f2fs_fs) | |
1133 | module_exit(exit_f2fs_fs) | |
1134 | ||
1135 | MODULE_AUTHOR("Samsung Electronics's Praesto Team"); | |
1136 | MODULE_DESCRIPTION("Flash Friendly File System"); | |
1137 | MODULE_LICENSE("GPL"); |