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 */ | |
77 | }; | |
78 | ||
b59d0bae NJ |
79 | struct f2fs_attr { |
80 | struct attribute attr; | |
81 | ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *); | |
82 | ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *, | |
83 | const char *, size_t); | |
ea91e9b0 | 84 | int struct_type; |
b59d0bae NJ |
85 | int offset; |
86 | }; | |
87 | ||
ea91e9b0 JK |
88 | static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type) |
89 | { | |
90 | if (struct_type == GC_THREAD) | |
91 | return (unsigned char *)sbi->gc_thread; | |
92 | else if (struct_type == SM_INFO) | |
93 | return (unsigned char *)SM_I(sbi); | |
94 | return NULL; | |
95 | } | |
96 | ||
b59d0bae NJ |
97 | static ssize_t f2fs_sbi_show(struct f2fs_attr *a, |
98 | struct f2fs_sb_info *sbi, char *buf) | |
99 | { | |
ea91e9b0 | 100 | unsigned char *ptr = NULL; |
b59d0bae NJ |
101 | unsigned int *ui; |
102 | ||
ea91e9b0 JK |
103 | ptr = __struct_ptr(sbi, a->struct_type); |
104 | if (!ptr) | |
b59d0bae NJ |
105 | return -EINVAL; |
106 | ||
ea91e9b0 | 107 | ui = (unsigned int *)(ptr + a->offset); |
b59d0bae NJ |
108 | |
109 | return snprintf(buf, PAGE_SIZE, "%u\n", *ui); | |
110 | } | |
111 | ||
112 | static ssize_t f2fs_sbi_store(struct f2fs_attr *a, | |
113 | struct f2fs_sb_info *sbi, | |
114 | const char *buf, size_t count) | |
115 | { | |
ea91e9b0 | 116 | unsigned char *ptr; |
b59d0bae NJ |
117 | unsigned long t; |
118 | unsigned int *ui; | |
119 | ssize_t ret; | |
120 | ||
ea91e9b0 JK |
121 | ptr = __struct_ptr(sbi, a->struct_type); |
122 | if (!ptr) | |
b59d0bae NJ |
123 | return -EINVAL; |
124 | ||
ea91e9b0 | 125 | ui = (unsigned int *)(ptr + a->offset); |
b59d0bae NJ |
126 | |
127 | ret = kstrtoul(skip_spaces(buf), 0, &t); | |
128 | if (ret < 0) | |
129 | return ret; | |
130 | *ui = t; | |
131 | return count; | |
132 | } | |
133 | ||
134 | static ssize_t f2fs_attr_show(struct kobject *kobj, | |
135 | struct attribute *attr, char *buf) | |
136 | { | |
137 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, | |
138 | s_kobj); | |
139 | struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); | |
140 | ||
141 | return a->show ? a->show(a, sbi, buf) : 0; | |
142 | } | |
143 | ||
144 | static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr, | |
145 | const char *buf, size_t len) | |
146 | { | |
147 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, | |
148 | s_kobj); | |
149 | struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); | |
150 | ||
151 | return a->store ? a->store(a, sbi, buf, len) : 0; | |
152 | } | |
153 | ||
154 | static void f2fs_sb_release(struct kobject *kobj) | |
155 | { | |
156 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, | |
157 | s_kobj); | |
158 | complete(&sbi->s_kobj_unregister); | |
159 | } | |
160 | ||
ea91e9b0 | 161 | #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \ |
b59d0bae NJ |
162 | static struct f2fs_attr f2fs_attr_##_name = { \ |
163 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
164 | .show = _show, \ | |
165 | .store = _store, \ | |
ea91e9b0 JK |
166 | .struct_type = _struct_type, \ |
167 | .offset = _offset \ | |
b59d0bae NJ |
168 | } |
169 | ||
ea91e9b0 JK |
170 | #define F2FS_RW_ATTR(struct_type, struct_name, name, elname) \ |
171 | F2FS_ATTR_OFFSET(struct_type, name, 0644, \ | |
172 | f2fs_sbi_show, f2fs_sbi_store, \ | |
173 | offsetof(struct struct_name, elname)) | |
b59d0bae | 174 | |
ea91e9b0 JK |
175 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time); |
176 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time); | |
177 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time); | |
178 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_idle, gc_idle); | |
179 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments); | |
7ac8c3b0 | 180 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, max_small_discards, max_discards); |
b59d0bae NJ |
181 | |
182 | #define ATTR_LIST(name) (&f2fs_attr_##name.attr) | |
183 | static struct attribute *f2fs_attrs[] = { | |
184 | ATTR_LIST(gc_min_sleep_time), | |
185 | ATTR_LIST(gc_max_sleep_time), | |
186 | ATTR_LIST(gc_no_gc_sleep_time), | |
d2dc095f | 187 | ATTR_LIST(gc_idle), |
ea91e9b0 | 188 | ATTR_LIST(reclaim_segments), |
7ac8c3b0 | 189 | ATTR_LIST(max_small_discards), |
b59d0bae NJ |
190 | NULL, |
191 | }; | |
192 | ||
193 | static const struct sysfs_ops f2fs_attr_ops = { | |
194 | .show = f2fs_attr_show, | |
195 | .store = f2fs_attr_store, | |
196 | }; | |
197 | ||
198 | static struct kobj_type f2fs_ktype = { | |
199 | .default_attrs = f2fs_attrs, | |
200 | .sysfs_ops = &f2fs_attr_ops, | |
201 | .release = f2fs_sb_release, | |
202 | }; | |
203 | ||
a07ef784 NJ |
204 | void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...) |
205 | { | |
206 | struct va_format vaf; | |
207 | va_list args; | |
208 | ||
209 | va_start(args, fmt); | |
210 | vaf.fmt = fmt; | |
211 | vaf.va = &args; | |
212 | printk("%sF2FS-fs (%s): %pV\n", level, sb->s_id, &vaf); | |
213 | va_end(args); | |
214 | } | |
215 | ||
aff063e2 JK |
216 | static void init_once(void *foo) |
217 | { | |
218 | struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo; | |
219 | ||
aff063e2 JK |
220 | inode_init_once(&fi->vfs_inode); |
221 | } | |
222 | ||
696c018c NJ |
223 | static int parse_options(struct super_block *sb, char *options) |
224 | { | |
225 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
226 | substring_t args[MAX_OPT_ARGS]; | |
227 | char *p, *name; | |
228 | int arg = 0; | |
229 | ||
230 | if (!options) | |
231 | return 0; | |
232 | ||
233 | while ((p = strsep(&options, ",")) != NULL) { | |
234 | int token; | |
235 | if (!*p) | |
236 | continue; | |
237 | /* | |
238 | * Initialize args struct so we know whether arg was | |
239 | * found; some options take optional arguments. | |
240 | */ | |
241 | args[0].to = args[0].from = NULL; | |
242 | token = match_token(p, f2fs_tokens, args); | |
243 | ||
244 | switch (token) { | |
245 | case Opt_gc_background: | |
246 | name = match_strdup(&args[0]); | |
247 | ||
248 | if (!name) | |
249 | return -ENOMEM; | |
250 | if (!strncmp(name, "on", 2)) | |
251 | set_opt(sbi, BG_GC); | |
252 | else if (!strncmp(name, "off", 3)) | |
253 | clear_opt(sbi, BG_GC); | |
254 | else { | |
255 | kfree(name); | |
256 | return -EINVAL; | |
257 | } | |
258 | kfree(name); | |
259 | break; | |
260 | case Opt_disable_roll_forward: | |
261 | set_opt(sbi, DISABLE_ROLL_FORWARD); | |
262 | break; | |
263 | case Opt_discard: | |
264 | set_opt(sbi, DISCARD); | |
265 | break; | |
266 | case Opt_noheap: | |
267 | set_opt(sbi, NOHEAP); | |
268 | break; | |
269 | #ifdef CONFIG_F2FS_FS_XATTR | |
4058c511 KA |
270 | case Opt_user_xattr: |
271 | set_opt(sbi, XATTR_USER); | |
272 | break; | |
696c018c NJ |
273 | case Opt_nouser_xattr: |
274 | clear_opt(sbi, XATTR_USER); | |
275 | break; | |
444c580f JK |
276 | case Opt_inline_xattr: |
277 | set_opt(sbi, INLINE_XATTR); | |
278 | break; | |
696c018c | 279 | #else |
4058c511 KA |
280 | case Opt_user_xattr: |
281 | f2fs_msg(sb, KERN_INFO, | |
282 | "user_xattr options not supported"); | |
283 | break; | |
696c018c NJ |
284 | case Opt_nouser_xattr: |
285 | f2fs_msg(sb, KERN_INFO, | |
286 | "nouser_xattr options not supported"); | |
287 | break; | |
444c580f JK |
288 | case Opt_inline_xattr: |
289 | f2fs_msg(sb, KERN_INFO, | |
290 | "inline_xattr options not supported"); | |
291 | break; | |
696c018c NJ |
292 | #endif |
293 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
4058c511 KA |
294 | case Opt_acl: |
295 | set_opt(sbi, POSIX_ACL); | |
296 | break; | |
696c018c NJ |
297 | case Opt_noacl: |
298 | clear_opt(sbi, POSIX_ACL); | |
299 | break; | |
300 | #else | |
4058c511 KA |
301 | case Opt_acl: |
302 | f2fs_msg(sb, KERN_INFO, "acl options not supported"); | |
303 | break; | |
696c018c NJ |
304 | case Opt_noacl: |
305 | f2fs_msg(sb, KERN_INFO, "noacl options not supported"); | |
306 | break; | |
307 | #endif | |
308 | case Opt_active_logs: | |
309 | if (args->from && match_int(args, &arg)) | |
310 | return -EINVAL; | |
311 | if (arg != 2 && arg != 4 && arg != NR_CURSEG_TYPE) | |
312 | return -EINVAL; | |
313 | sbi->active_logs = arg; | |
314 | break; | |
315 | case Opt_disable_ext_identify: | |
316 | set_opt(sbi, DISABLE_EXT_IDENTIFY); | |
317 | break; | |
8274de77 HL |
318 | case Opt_inline_data: |
319 | set_opt(sbi, INLINE_DATA); | |
320 | break; | |
696c018c NJ |
321 | default: |
322 | f2fs_msg(sb, KERN_ERR, | |
323 | "Unrecognized mount option \"%s\" or missing value", | |
324 | p); | |
325 | return -EINVAL; | |
326 | } | |
327 | } | |
328 | return 0; | |
329 | } | |
330 | ||
aff063e2 JK |
331 | static struct inode *f2fs_alloc_inode(struct super_block *sb) |
332 | { | |
333 | struct f2fs_inode_info *fi; | |
334 | ||
a0acdfe0 | 335 | fi = kmem_cache_alloc(f2fs_inode_cachep, GFP_F2FS_ZERO); |
aff063e2 JK |
336 | if (!fi) |
337 | return NULL; | |
338 | ||
339 | init_once((void *) fi); | |
340 | ||
434720fa | 341 | /* Initialize f2fs-specific inode info */ |
aff063e2 JK |
342 | fi->vfs_inode.i_version = 1; |
343 | atomic_set(&fi->dirty_dents, 0); | |
344 | fi->i_current_depth = 1; | |
345 | fi->i_advise = 0; | |
346 | rwlock_init(&fi->ext.ext_lock); | |
347 | ||
348 | set_inode_flag(fi, FI_NEW_INODE); | |
349 | ||
444c580f JK |
350 | if (test_opt(F2FS_SB(sb), INLINE_XATTR)) |
351 | set_inode_flag(fi, FI_INLINE_XATTR); | |
352 | ||
aff063e2 JK |
353 | return &fi->vfs_inode; |
354 | } | |
355 | ||
531ad7d5 JK |
356 | static int f2fs_drop_inode(struct inode *inode) |
357 | { | |
358 | /* | |
359 | * This is to avoid a deadlock condition like below. | |
360 | * writeback_single_inode(inode) | |
361 | * - f2fs_write_data_page | |
362 | * - f2fs_gc -> iput -> evict | |
363 | * - inode_wait_for_writeback(inode) | |
364 | */ | |
365 | if (!inode_unhashed(inode) && inode->i_state & I_SYNC) | |
366 | return 0; | |
367 | return generic_drop_inode(inode); | |
368 | } | |
369 | ||
b3783873 JK |
370 | /* |
371 | * f2fs_dirty_inode() is called from __mark_inode_dirty() | |
372 | * | |
373 | * We should call set_dirty_inode to write the dirty inode through write_inode. | |
374 | */ | |
375 | static void f2fs_dirty_inode(struct inode *inode, int flags) | |
376 | { | |
377 | set_inode_flag(F2FS_I(inode), FI_DIRTY_INODE); | |
b3783873 JK |
378 | } |
379 | ||
aff063e2 JK |
380 | static void f2fs_i_callback(struct rcu_head *head) |
381 | { | |
382 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
383 | kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode)); | |
384 | } | |
385 | ||
25ca923b | 386 | static void f2fs_destroy_inode(struct inode *inode) |
aff063e2 JK |
387 | { |
388 | call_rcu(&inode->i_rcu, f2fs_i_callback); | |
389 | } | |
390 | ||
391 | static void f2fs_put_super(struct super_block *sb) | |
392 | { | |
393 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
394 | ||
5e176d54 JK |
395 | if (sbi->s_proc) { |
396 | remove_proc_entry("segment_info", sbi->s_proc); | |
397 | remove_proc_entry(sb->s_id, f2fs_proc_root); | |
398 | } | |
b59d0bae | 399 | kobject_del(&sbi->s_kobj); |
5e176d54 | 400 | |
aff063e2 JK |
401 | f2fs_destroy_stats(sbi); |
402 | stop_gc_thread(sbi); | |
403 | ||
5887d291 JK |
404 | /* We don't need to do checkpoint when it's clean */ |
405 | if (sbi->s_dirty && get_pages(sbi, F2FS_DIRTY_NODES)) | |
406 | write_checkpoint(sbi, true); | |
aff063e2 JK |
407 | |
408 | iput(sbi->node_inode); | |
409 | iput(sbi->meta_inode); | |
410 | ||
411 | /* destroy f2fs internal modules */ | |
412 | destroy_node_manager(sbi); | |
413 | destroy_segment_manager(sbi); | |
414 | ||
415 | kfree(sbi->ckpt); | |
b59d0bae NJ |
416 | kobject_put(&sbi->s_kobj); |
417 | wait_for_completion(&sbi->s_kobj_unregister); | |
aff063e2 JK |
418 | |
419 | sb->s_fs_info = NULL; | |
420 | brelse(sbi->raw_super_buf); | |
421 | kfree(sbi); | |
422 | } | |
423 | ||
424 | int f2fs_sync_fs(struct super_block *sb, int sync) | |
425 | { | |
426 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
aff063e2 | 427 | |
a2a4a7e4 NJ |
428 | trace_f2fs_sync_fs(sb, sync); |
429 | ||
aff063e2 JK |
430 | if (!sbi->s_dirty && !get_pages(sbi, F2FS_DIRTY_NODES)) |
431 | return 0; | |
432 | ||
b7473754 JK |
433 | if (sync) { |
434 | mutex_lock(&sbi->gc_mutex); | |
43727527 | 435 | write_checkpoint(sbi, false); |
b7473754 JK |
436 | mutex_unlock(&sbi->gc_mutex); |
437 | } else { | |
7d82db83 | 438 | f2fs_balance_fs(sbi); |
b7473754 | 439 | } |
aff063e2 | 440 | |
64c576fe | 441 | return 0; |
aff063e2 JK |
442 | } |
443 | ||
d6212a5f CL |
444 | static int f2fs_freeze(struct super_block *sb) |
445 | { | |
446 | int err; | |
447 | ||
77888c1e | 448 | if (f2fs_readonly(sb)) |
d6212a5f CL |
449 | return 0; |
450 | ||
451 | err = f2fs_sync_fs(sb, 1); | |
452 | return err; | |
453 | } | |
454 | ||
455 | static int f2fs_unfreeze(struct super_block *sb) | |
456 | { | |
457 | return 0; | |
458 | } | |
459 | ||
aff063e2 JK |
460 | static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf) |
461 | { | |
462 | struct super_block *sb = dentry->d_sb; | |
463 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
464 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); | |
465 | block_t total_count, user_block_count, start_count, ovp_count; | |
466 | ||
467 | total_count = le64_to_cpu(sbi->raw_super->block_count); | |
468 | user_block_count = sbi->user_block_count; | |
469 | start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr); | |
470 | ovp_count = SM_I(sbi)->ovp_segments << sbi->log_blocks_per_seg; | |
471 | buf->f_type = F2FS_SUPER_MAGIC; | |
472 | buf->f_bsize = sbi->blocksize; | |
473 | ||
474 | buf->f_blocks = total_count - start_count; | |
475 | buf->f_bfree = buf->f_blocks - valid_user_blocks(sbi) - ovp_count; | |
476 | buf->f_bavail = user_block_count - valid_user_blocks(sbi); | |
477 | ||
1362b5e3 JK |
478 | buf->f_files = sbi->total_node_count; |
479 | buf->f_ffree = sbi->total_node_count - valid_inode_count(sbi); | |
aff063e2 | 480 | |
5a20d339 | 481 | buf->f_namelen = F2FS_NAME_LEN; |
aff063e2 JK |
482 | buf->f_fsid.val[0] = (u32)id; |
483 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
484 | ||
485 | return 0; | |
486 | } | |
487 | ||
488 | static int f2fs_show_options(struct seq_file *seq, struct dentry *root) | |
489 | { | |
490 | struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb); | |
491 | ||
696c018c NJ |
492 | if (!(root->d_sb->s_flags & MS_RDONLY) && test_opt(sbi, BG_GC)) |
493 | seq_printf(seq, ",background_gc=%s", "on"); | |
aff063e2 | 494 | else |
696c018c | 495 | seq_printf(seq, ",background_gc=%s", "off"); |
aff063e2 JK |
496 | if (test_opt(sbi, DISABLE_ROLL_FORWARD)) |
497 | seq_puts(seq, ",disable_roll_forward"); | |
498 | if (test_opt(sbi, DISCARD)) | |
499 | seq_puts(seq, ",discard"); | |
500 | if (test_opt(sbi, NOHEAP)) | |
501 | seq_puts(seq, ",no_heap_alloc"); | |
502 | #ifdef CONFIG_F2FS_FS_XATTR | |
503 | if (test_opt(sbi, XATTR_USER)) | |
504 | seq_puts(seq, ",user_xattr"); | |
505 | else | |
506 | seq_puts(seq, ",nouser_xattr"); | |
444c580f JK |
507 | if (test_opt(sbi, INLINE_XATTR)) |
508 | seq_puts(seq, ",inline_xattr"); | |
aff063e2 JK |
509 | #endif |
510 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
511 | if (test_opt(sbi, POSIX_ACL)) | |
512 | seq_puts(seq, ",acl"); | |
513 | else | |
514 | seq_puts(seq, ",noacl"); | |
515 | #endif | |
516 | if (test_opt(sbi, DISABLE_EXT_IDENTIFY)) | |
aa43507f | 517 | seq_puts(seq, ",disable_ext_identify"); |
8274de77 HL |
518 | if (test_opt(sbi, INLINE_DATA)) |
519 | seq_puts(seq, ",inline_data"); | |
aff063e2 JK |
520 | seq_printf(seq, ",active_logs=%u", sbi->active_logs); |
521 | ||
522 | return 0; | |
523 | } | |
524 | ||
5e176d54 JK |
525 | static int segment_info_seq_show(struct seq_file *seq, void *offset) |
526 | { | |
527 | struct super_block *sb = seq->private; | |
528 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
529 | unsigned int total_segs = le32_to_cpu(sbi->raw_super->segment_count_main); | |
530 | int i; | |
531 | ||
532 | for (i = 0; i < total_segs; i++) { | |
533 | seq_printf(seq, "%u", get_valid_blocks(sbi, i, 1)); | |
534 | if (i != 0 && (i % 10) == 0) | |
535 | seq_puts(seq, "\n"); | |
536 | else | |
537 | seq_puts(seq, " "); | |
538 | } | |
539 | return 0; | |
540 | } | |
541 | ||
542 | static int segment_info_open_fs(struct inode *inode, struct file *file) | |
543 | { | |
544 | return single_open(file, segment_info_seq_show, PDE_DATA(inode)); | |
545 | } | |
546 | ||
547 | static const struct file_operations f2fs_seq_segment_info_fops = { | |
548 | .owner = THIS_MODULE, | |
549 | .open = segment_info_open_fs, | |
550 | .read = seq_read, | |
551 | .llseek = seq_lseek, | |
552 | .release = single_release, | |
553 | }; | |
554 | ||
696c018c NJ |
555 | static int f2fs_remount(struct super_block *sb, int *flags, char *data) |
556 | { | |
557 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
558 | struct f2fs_mount_info org_mount_opt; | |
559 | int err, active_logs; | |
560 | ||
561 | /* | |
562 | * Save the old mount options in case we | |
563 | * need to restore them. | |
564 | */ | |
565 | org_mount_opt = sbi->mount_opt; | |
566 | active_logs = sbi->active_logs; | |
567 | ||
568 | /* parse mount options */ | |
569 | err = parse_options(sb, data); | |
570 | if (err) | |
571 | goto restore_opts; | |
572 | ||
573 | /* | |
574 | * Previous and new state of filesystem is RO, | |
575 | * so no point in checking GC conditions. | |
576 | */ | |
577 | if ((sb->s_flags & MS_RDONLY) && (*flags & MS_RDONLY)) | |
578 | goto skip; | |
579 | ||
580 | /* | |
581 | * We stop the GC thread if FS is mounted as RO | |
582 | * or if background_gc = off is passed in mount | |
583 | * option. Also sync the filesystem. | |
584 | */ | |
585 | if ((*flags & MS_RDONLY) || !test_opt(sbi, BG_GC)) { | |
586 | if (sbi->gc_thread) { | |
587 | stop_gc_thread(sbi); | |
588 | f2fs_sync_fs(sb, 1); | |
589 | } | |
590 | } else if (test_opt(sbi, BG_GC) && !sbi->gc_thread) { | |
591 | err = start_gc_thread(sbi); | |
592 | if (err) | |
593 | goto restore_opts; | |
594 | } | |
595 | skip: | |
596 | /* Update the POSIXACL Flag */ | |
597 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
598 | (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0); | |
599 | return 0; | |
600 | ||
601 | restore_opts: | |
602 | sbi->mount_opt = org_mount_opt; | |
603 | sbi->active_logs = active_logs; | |
604 | return err; | |
605 | } | |
606 | ||
aff063e2 JK |
607 | static struct super_operations f2fs_sops = { |
608 | .alloc_inode = f2fs_alloc_inode, | |
531ad7d5 | 609 | .drop_inode = f2fs_drop_inode, |
aff063e2 JK |
610 | .destroy_inode = f2fs_destroy_inode, |
611 | .write_inode = f2fs_write_inode, | |
b3783873 | 612 | .dirty_inode = f2fs_dirty_inode, |
aff063e2 JK |
613 | .show_options = f2fs_show_options, |
614 | .evict_inode = f2fs_evict_inode, | |
615 | .put_super = f2fs_put_super, | |
616 | .sync_fs = f2fs_sync_fs, | |
d6212a5f CL |
617 | .freeze_fs = f2fs_freeze, |
618 | .unfreeze_fs = f2fs_unfreeze, | |
aff063e2 | 619 | .statfs = f2fs_statfs, |
696c018c | 620 | .remount_fs = f2fs_remount, |
aff063e2 JK |
621 | }; |
622 | ||
623 | static struct inode *f2fs_nfs_get_inode(struct super_block *sb, | |
624 | u64 ino, u32 generation) | |
625 | { | |
626 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
627 | struct inode *inode; | |
628 | ||
6bacf52f | 629 | if (unlikely(ino < F2FS_ROOT_INO(sbi))) |
aff063e2 JK |
630 | return ERR_PTR(-ESTALE); |
631 | ||
632 | /* | |
633 | * f2fs_iget isn't quite right if the inode is currently unallocated! | |
634 | * However f2fs_iget currently does appropriate checks to handle stale | |
635 | * inodes so everything is OK. | |
636 | */ | |
637 | inode = f2fs_iget(sb, ino); | |
638 | if (IS_ERR(inode)) | |
639 | return ERR_CAST(inode); | |
6bacf52f | 640 | if (unlikely(generation && inode->i_generation != generation)) { |
aff063e2 JK |
641 | /* we didn't find the right inode.. */ |
642 | iput(inode); | |
643 | return ERR_PTR(-ESTALE); | |
644 | } | |
645 | return inode; | |
646 | } | |
647 | ||
648 | static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
649 | int fh_len, int fh_type) | |
650 | { | |
651 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
652 | f2fs_nfs_get_inode); | |
653 | } | |
654 | ||
655 | static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid, | |
656 | int fh_len, int fh_type) | |
657 | { | |
658 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
659 | f2fs_nfs_get_inode); | |
660 | } | |
661 | ||
662 | static const struct export_operations f2fs_export_ops = { | |
663 | .fh_to_dentry = f2fs_fh_to_dentry, | |
664 | .fh_to_parent = f2fs_fh_to_parent, | |
665 | .get_parent = f2fs_get_parent, | |
666 | }; | |
667 | ||
aff063e2 JK |
668 | static loff_t max_file_size(unsigned bits) |
669 | { | |
de93653f | 670 | loff_t result = (DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS); |
aff063e2 JK |
671 | loff_t leaf_count = ADDRS_PER_BLOCK; |
672 | ||
673 | /* two direct node blocks */ | |
674 | result += (leaf_count * 2); | |
675 | ||
676 | /* two indirect node blocks */ | |
677 | leaf_count *= NIDS_PER_BLOCK; | |
678 | result += (leaf_count * 2); | |
679 | ||
680 | /* one double indirect node block */ | |
681 | leaf_count *= NIDS_PER_BLOCK; | |
682 | result += leaf_count; | |
683 | ||
684 | result <<= bits; | |
685 | return result; | |
686 | } | |
687 | ||
a07ef784 NJ |
688 | static int sanity_check_raw_super(struct super_block *sb, |
689 | struct f2fs_super_block *raw_super) | |
aff063e2 JK |
690 | { |
691 | unsigned int blocksize; | |
692 | ||
a07ef784 NJ |
693 | if (F2FS_SUPER_MAGIC != le32_to_cpu(raw_super->magic)) { |
694 | f2fs_msg(sb, KERN_INFO, | |
695 | "Magic Mismatch, valid(0x%x) - read(0x%x)", | |
696 | F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic)); | |
aff063e2 | 697 | return 1; |
a07ef784 | 698 | } |
aff063e2 | 699 | |
5c9b4692 | 700 | /* Currently, support only 4KB page cache size */ |
701 | if (F2FS_BLKSIZE != PAGE_CACHE_SIZE) { | |
702 | f2fs_msg(sb, KERN_INFO, | |
14d7e9de | 703 | "Invalid page_cache_size (%lu), supports only 4KB\n", |
5c9b4692 | 704 | PAGE_CACHE_SIZE); |
705 | return 1; | |
706 | } | |
707 | ||
aff063e2 JK |
708 | /* Currently, support only 4KB block size */ |
709 | blocksize = 1 << le32_to_cpu(raw_super->log_blocksize); | |
5c9b4692 | 710 | if (blocksize != F2FS_BLKSIZE) { |
a07ef784 NJ |
711 | f2fs_msg(sb, KERN_INFO, |
712 | "Invalid blocksize (%u), supports only 4KB\n", | |
713 | blocksize); | |
aff063e2 | 714 | return 1; |
a07ef784 | 715 | } |
5c9b4692 | 716 | |
aff063e2 | 717 | if (le32_to_cpu(raw_super->log_sectorsize) != |
a07ef784 NJ |
718 | F2FS_LOG_SECTOR_SIZE) { |
719 | f2fs_msg(sb, KERN_INFO, "Invalid log sectorsize"); | |
aff063e2 | 720 | return 1; |
a07ef784 | 721 | } |
aff063e2 | 722 | if (le32_to_cpu(raw_super->log_sectors_per_block) != |
a07ef784 NJ |
723 | F2FS_LOG_SECTORS_PER_BLOCK) { |
724 | f2fs_msg(sb, KERN_INFO, "Invalid log sectors per block"); | |
aff063e2 | 725 | return 1; |
a07ef784 | 726 | } |
aff063e2 JK |
727 | return 0; |
728 | } | |
729 | ||
577e3495 | 730 | static int sanity_check_ckpt(struct f2fs_sb_info *sbi) |
aff063e2 JK |
731 | { |
732 | unsigned int total, fsmeta; | |
577e3495 JK |
733 | struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); |
734 | struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); | |
aff063e2 JK |
735 | |
736 | total = le32_to_cpu(raw_super->segment_count); | |
737 | fsmeta = le32_to_cpu(raw_super->segment_count_ckpt); | |
738 | fsmeta += le32_to_cpu(raw_super->segment_count_sit); | |
739 | fsmeta += le32_to_cpu(raw_super->segment_count_nat); | |
740 | fsmeta += le32_to_cpu(ckpt->rsvd_segment_count); | |
741 | fsmeta += le32_to_cpu(raw_super->segment_count_ssa); | |
742 | ||
6bacf52f | 743 | if (unlikely(fsmeta >= total)) |
aff063e2 | 744 | return 1; |
577e3495 | 745 | |
6bacf52f | 746 | if (unlikely(is_set_ckpt_flags(ckpt, CP_ERROR_FLAG))) { |
577e3495 JK |
747 | f2fs_msg(sbi->sb, KERN_ERR, "A bug case: need to run fsck"); |
748 | return 1; | |
749 | } | |
aff063e2 JK |
750 | return 0; |
751 | } | |
752 | ||
753 | static void init_sb_info(struct f2fs_sb_info *sbi) | |
754 | { | |
755 | struct f2fs_super_block *raw_super = sbi->raw_super; | |
756 | int i; | |
757 | ||
758 | sbi->log_sectors_per_block = | |
759 | le32_to_cpu(raw_super->log_sectors_per_block); | |
760 | sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize); | |
761 | sbi->blocksize = 1 << sbi->log_blocksize; | |
762 | sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg); | |
763 | sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg; | |
764 | sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec); | |
765 | sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone); | |
766 | sbi->total_sections = le32_to_cpu(raw_super->section_count); | |
767 | sbi->total_node_count = | |
768 | (le32_to_cpu(raw_super->segment_count_nat) / 2) | |
769 | * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK; | |
770 | sbi->root_ino_num = le32_to_cpu(raw_super->root_ino); | |
771 | sbi->node_ino_num = le32_to_cpu(raw_super->node_ino); | |
772 | sbi->meta_ino_num = le32_to_cpu(raw_super->meta_ino); | |
5ec4e49f | 773 | sbi->cur_victim_sec = NULL_SECNO; |
aff063e2 JK |
774 | |
775 | for (i = 0; i < NR_COUNT_TYPE; i++) | |
776 | atomic_set(&sbi->nr_pages[i], 0); | |
777 | } | |
778 | ||
9076a75f GZ |
779 | /* |
780 | * Read f2fs raw super block. | |
781 | * Because we have two copies of super block, so read the first one at first, | |
782 | * if the first one is invalid, move to read the second one. | |
783 | */ | |
784 | static int read_raw_super_block(struct super_block *sb, | |
785 | struct f2fs_super_block **raw_super, | |
786 | struct buffer_head **raw_super_buf) | |
14d7e9de | 787 | { |
9076a75f | 788 | int block = 0; |
14d7e9de | 789 | |
9076a75f | 790 | retry: |
14d7e9de | 791 | *raw_super_buf = sb_bread(sb, block); |
792 | if (!*raw_super_buf) { | |
9076a75f GZ |
793 | f2fs_msg(sb, KERN_ERR, "Unable to read %dth superblock", |
794 | block + 1); | |
795 | if (block == 0) { | |
796 | block++; | |
797 | goto retry; | |
798 | } else { | |
799 | return -EIO; | |
800 | } | |
14d7e9de | 801 | } |
802 | ||
803 | *raw_super = (struct f2fs_super_block *) | |
804 | ((char *)(*raw_super_buf)->b_data + F2FS_SUPER_OFFSET); | |
805 | ||
806 | /* sanity checking of raw super */ | |
9076a75f GZ |
807 | if (sanity_check_raw_super(sb, *raw_super)) { |
808 | brelse(*raw_super_buf); | |
809 | f2fs_msg(sb, KERN_ERR, "Can't find a valid F2FS filesystem " | |
810 | "in %dth superblock", block + 1); | |
6bacf52f | 811 | if (block == 0) { |
9076a75f GZ |
812 | block++; |
813 | goto retry; | |
814 | } else { | |
815 | return -EINVAL; | |
816 | } | |
817 | } | |
14d7e9de | 818 | |
9076a75f | 819 | return 0; |
14d7e9de | 820 | } |
821 | ||
aff063e2 JK |
822 | static int f2fs_fill_super(struct super_block *sb, void *data, int silent) |
823 | { | |
824 | struct f2fs_sb_info *sbi; | |
825 | struct f2fs_super_block *raw_super; | |
826 | struct buffer_head *raw_super_buf; | |
827 | struct inode *root; | |
828 | long err = -EINVAL; | |
971767ca | 829 | int i; |
aff063e2 JK |
830 | |
831 | /* allocate memory for f2fs-specific super block info */ | |
832 | sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL); | |
833 | if (!sbi) | |
834 | return -ENOMEM; | |
835 | ||
ff9234ad | 836 | /* set a block size */ |
6bacf52f | 837 | if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) { |
a07ef784 | 838 | f2fs_msg(sb, KERN_ERR, "unable to set blocksize"); |
aff063e2 | 839 | goto free_sbi; |
a07ef784 | 840 | } |
aff063e2 | 841 | |
9076a75f GZ |
842 | err = read_raw_super_block(sb, &raw_super, &raw_super_buf); |
843 | if (err) | |
844 | goto free_sbi; | |
845 | ||
5fb08372 | 846 | sb->s_fs_info = sbi; |
aff063e2 JK |
847 | /* init some FS parameters */ |
848 | sbi->active_logs = NR_CURSEG_TYPE; | |
849 | ||
850 | set_opt(sbi, BG_GC); | |
851 | ||
852 | #ifdef CONFIG_F2FS_FS_XATTR | |
853 | set_opt(sbi, XATTR_USER); | |
854 | #endif | |
855 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
856 | set_opt(sbi, POSIX_ACL); | |
857 | #endif | |
858 | /* parse mount options */ | |
5fb08372 | 859 | err = parse_options(sb, (char *)data); |
66348b72 | 860 | if (err) |
aff063e2 JK |
861 | goto free_sb_buf; |
862 | ||
25ca923b | 863 | sb->s_maxbytes = max_file_size(le32_to_cpu(raw_super->log_blocksize)); |
aff063e2 JK |
864 | sb->s_max_links = F2FS_LINK_MAX; |
865 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
866 | ||
867 | sb->s_op = &f2fs_sops; | |
868 | sb->s_xattr = f2fs_xattr_handlers; | |
869 | sb->s_export_op = &f2fs_export_ops; | |
870 | sb->s_magic = F2FS_SUPER_MAGIC; | |
aff063e2 JK |
871 | sb->s_time_gran = 1; |
872 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
873 | (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0); | |
874 | memcpy(sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid)); | |
875 | ||
876 | /* init f2fs-specific super block info */ | |
877 | sbi->sb = sb; | |
878 | sbi->raw_super = raw_super; | |
879 | sbi->raw_super_buf = raw_super_buf; | |
880 | mutex_init(&sbi->gc_mutex); | |
aff063e2 JK |
881 | mutex_init(&sbi->writepages); |
882 | mutex_init(&sbi->cp_mutex); | |
39936837 | 883 | mutex_init(&sbi->node_write); |
aabe5136 | 884 | sbi->por_doing = false; |
aff063e2 | 885 | spin_lock_init(&sbi->stat_lock); |
971767ca | 886 | |
924b720b | 887 | mutex_init(&sbi->read_io.io_mutex); |
971767ca | 888 | for (i = 0; i < NR_PAGE_TYPE; i++) |
1ff7bd3b | 889 | mutex_init(&sbi->write_io[i].io_mutex); |
971767ca | 890 | |
e479556b | 891 | init_rwsem(&sbi->cp_rwsem); |
fb51b5ef | 892 | init_waitqueue_head(&sbi->cp_wait); |
aff063e2 JK |
893 | init_sb_info(sbi); |
894 | ||
895 | /* get an inode for meta space */ | |
896 | sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi)); | |
897 | if (IS_ERR(sbi->meta_inode)) { | |
a07ef784 | 898 | f2fs_msg(sb, KERN_ERR, "Failed to read F2FS meta data inode"); |
aff063e2 JK |
899 | err = PTR_ERR(sbi->meta_inode); |
900 | goto free_sb_buf; | |
901 | } | |
902 | ||
903 | err = get_valid_checkpoint(sbi); | |
a07ef784 NJ |
904 | if (err) { |
905 | f2fs_msg(sb, KERN_ERR, "Failed to get valid F2FS checkpoint"); | |
aff063e2 | 906 | goto free_meta_inode; |
a07ef784 | 907 | } |
aff063e2 JK |
908 | |
909 | /* sanity checking of checkpoint */ | |
910 | err = -EINVAL; | |
577e3495 | 911 | if (sanity_check_ckpt(sbi)) { |
a07ef784 | 912 | f2fs_msg(sb, KERN_ERR, "Invalid F2FS checkpoint"); |
aff063e2 | 913 | goto free_cp; |
a07ef784 | 914 | } |
aff063e2 JK |
915 | |
916 | sbi->total_valid_node_count = | |
917 | le32_to_cpu(sbi->ckpt->valid_node_count); | |
918 | sbi->total_valid_inode_count = | |
919 | le32_to_cpu(sbi->ckpt->valid_inode_count); | |
920 | sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count); | |
921 | sbi->total_valid_block_count = | |
922 | le64_to_cpu(sbi->ckpt->valid_block_count); | |
923 | sbi->last_valid_block_count = sbi->total_valid_block_count; | |
924 | sbi->alloc_valid_block_count = 0; | |
925 | INIT_LIST_HEAD(&sbi->dir_inode_list); | |
926 | spin_lock_init(&sbi->dir_inode_lock); | |
927 | ||
aff063e2 JK |
928 | init_orphan_info(sbi); |
929 | ||
930 | /* setup f2fs internal modules */ | |
931 | err = build_segment_manager(sbi); | |
a07ef784 NJ |
932 | if (err) { |
933 | f2fs_msg(sb, KERN_ERR, | |
934 | "Failed to initialize F2FS segment manager"); | |
aff063e2 | 935 | goto free_sm; |
a07ef784 | 936 | } |
aff063e2 | 937 | err = build_node_manager(sbi); |
a07ef784 NJ |
938 | if (err) { |
939 | f2fs_msg(sb, KERN_ERR, | |
940 | "Failed to initialize F2FS node manager"); | |
aff063e2 | 941 | goto free_nm; |
a07ef784 | 942 | } |
aff063e2 JK |
943 | |
944 | build_gc_manager(sbi); | |
945 | ||
946 | /* get an inode for node space */ | |
947 | sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi)); | |
948 | if (IS_ERR(sbi->node_inode)) { | |
a07ef784 | 949 | f2fs_msg(sb, KERN_ERR, "Failed to read node inode"); |
aff063e2 JK |
950 | err = PTR_ERR(sbi->node_inode); |
951 | goto free_nm; | |
952 | } | |
953 | ||
954 | /* if there are nt orphan nodes free them */ | |
8f99a946 | 955 | recover_orphan_inodes(sbi); |
aff063e2 JK |
956 | |
957 | /* read root inode and dentry */ | |
958 | root = f2fs_iget(sb, F2FS_ROOT_INO(sbi)); | |
959 | if (IS_ERR(root)) { | |
a07ef784 | 960 | f2fs_msg(sb, KERN_ERR, "Failed to read root inode"); |
aff063e2 JK |
961 | err = PTR_ERR(root); |
962 | goto free_node_inode; | |
963 | } | |
8f99a946 CY |
964 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { |
965 | err = -EINVAL; | |
aff063e2 | 966 | goto free_root_inode; |
8f99a946 | 967 | } |
aff063e2 JK |
968 | |
969 | sb->s_root = d_make_root(root); /* allocate root dentry */ | |
970 | if (!sb->s_root) { | |
971 | err = -ENOMEM; | |
972 | goto free_root_inode; | |
973 | } | |
974 | ||
975 | /* recover fsynced data */ | |
6ead1142 JK |
976 | if (!test_opt(sbi, DISABLE_ROLL_FORWARD)) { |
977 | err = recover_fsync_data(sbi); | |
bde582b2 CF |
978 | if (err) |
979 | f2fs_msg(sb, KERN_ERR, | |
980 | "Cannot recover all fsync data errno=%ld", err); | |
6ead1142 | 981 | } |
aff063e2 | 982 | |
696c018c NJ |
983 | /* |
984 | * If filesystem is not mounted as read-only then | |
985 | * do start the gc_thread. | |
986 | */ | |
987 | if (!(sb->s_flags & MS_RDONLY)) { | |
988 | /* After POR, we can run background GC thread.*/ | |
989 | err = start_gc_thread(sbi); | |
990 | if (err) | |
1d15bd20 | 991 | goto free_gc; |
696c018c | 992 | } |
aff063e2 JK |
993 | |
994 | err = f2fs_build_stats(sbi); | |
995 | if (err) | |
1d15bd20 | 996 | goto free_gc; |
aff063e2 | 997 | |
5e176d54 JK |
998 | if (f2fs_proc_root) |
999 | sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root); | |
1000 | ||
1001 | if (sbi->s_proc) | |
1002 | proc_create_data("segment_info", S_IRUGO, sbi->s_proc, | |
1003 | &f2fs_seq_segment_info_fops, sb); | |
1004 | ||
d3ee456d NJ |
1005 | if (test_opt(sbi, DISCARD)) { |
1006 | struct request_queue *q = bdev_get_queue(sb->s_bdev); | |
1007 | if (!blk_queue_discard(q)) | |
1008 | f2fs_msg(sb, KERN_WARNING, | |
1009 | "mounting with \"discard\" option, but " | |
1010 | "the device does not support discard"); | |
1011 | } | |
1012 | ||
b59d0bae NJ |
1013 | sbi->s_kobj.kset = f2fs_kset; |
1014 | init_completion(&sbi->s_kobj_unregister); | |
1015 | err = kobject_init_and_add(&sbi->s_kobj, &f2fs_ktype, NULL, | |
1016 | "%s", sb->s_id); | |
1017 | if (err) | |
1018 | goto fail; | |
1019 | ||
aff063e2 JK |
1020 | return 0; |
1021 | fail: | |
1d15bd20 CY |
1022 | if (sbi->s_proc) { |
1023 | remove_proc_entry("segment_info", sbi->s_proc); | |
1024 | remove_proc_entry(sb->s_id, f2fs_proc_root); | |
1025 | } | |
1026 | f2fs_destroy_stats(sbi); | |
1027 | free_gc: | |
aff063e2 JK |
1028 | stop_gc_thread(sbi); |
1029 | free_root_inode: | |
1030 | dput(sb->s_root); | |
1031 | sb->s_root = NULL; | |
1032 | free_node_inode: | |
1033 | iput(sbi->node_inode); | |
1034 | free_nm: | |
1035 | destroy_node_manager(sbi); | |
1036 | free_sm: | |
1037 | destroy_segment_manager(sbi); | |
1038 | free_cp: | |
1039 | kfree(sbi->ckpt); | |
1040 | free_meta_inode: | |
1041 | make_bad_inode(sbi->meta_inode); | |
1042 | iput(sbi->meta_inode); | |
1043 | free_sb_buf: | |
1044 | brelse(raw_super_buf); | |
1045 | free_sbi: | |
1046 | kfree(sbi); | |
1047 | return err; | |
1048 | } | |
1049 | ||
1050 | static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags, | |
1051 | const char *dev_name, void *data) | |
1052 | { | |
1053 | return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super); | |
1054 | } | |
1055 | ||
1056 | static struct file_system_type f2fs_fs_type = { | |
1057 | .owner = THIS_MODULE, | |
1058 | .name = "f2fs", | |
1059 | .mount = f2fs_mount, | |
1060 | .kill_sb = kill_block_super, | |
1061 | .fs_flags = FS_REQUIRES_DEV, | |
1062 | }; | |
7f78e035 | 1063 | MODULE_ALIAS_FS("f2fs"); |
aff063e2 | 1064 | |
6e6093a8 | 1065 | static int __init init_inodecache(void) |
aff063e2 JK |
1066 | { |
1067 | f2fs_inode_cachep = f2fs_kmem_cache_create("f2fs_inode_cache", | |
1068 | sizeof(struct f2fs_inode_info), NULL); | |
6bacf52f | 1069 | if (!f2fs_inode_cachep) |
aff063e2 JK |
1070 | return -ENOMEM; |
1071 | return 0; | |
1072 | } | |
1073 | ||
1074 | static void destroy_inodecache(void) | |
1075 | { | |
1076 | /* | |
1077 | * Make sure all delayed rcu free inodes are flushed before we | |
1078 | * destroy cache. | |
1079 | */ | |
1080 | rcu_barrier(); | |
1081 | kmem_cache_destroy(f2fs_inode_cachep); | |
1082 | } | |
1083 | ||
1084 | static int __init init_f2fs_fs(void) | |
1085 | { | |
1086 | int err; | |
1087 | ||
1088 | err = init_inodecache(); | |
1089 | if (err) | |
1090 | goto fail; | |
1091 | err = create_node_manager_caches(); | |
1092 | if (err) | |
9890ff3f | 1093 | goto free_inodecache; |
7fd9e544 | 1094 | err = create_segment_manager_caches(); |
aff063e2 | 1095 | if (err) |
9890ff3f | 1096 | goto free_node_manager_caches; |
7fd9e544 JK |
1097 | err = create_gc_caches(); |
1098 | if (err) | |
1099 | goto free_segment_manager_caches; | |
aff063e2 JK |
1100 | err = create_checkpoint_caches(); |
1101 | if (err) | |
9890ff3f | 1102 | goto free_gc_caches; |
b59d0bae | 1103 | f2fs_kset = kset_create_and_add("f2fs", NULL, fs_kobj); |
6e6b978c WY |
1104 | if (!f2fs_kset) { |
1105 | err = -ENOMEM; | |
9890ff3f | 1106 | goto free_checkpoint_caches; |
6e6b978c | 1107 | } |
4589d25d NJ |
1108 | err = register_filesystem(&f2fs_fs_type); |
1109 | if (err) | |
9890ff3f | 1110 | goto free_kset; |
4589d25d | 1111 | f2fs_create_root_stats(); |
5e176d54 | 1112 | f2fs_proc_root = proc_mkdir("fs/f2fs", NULL); |
9890ff3f ZH |
1113 | return 0; |
1114 | ||
1115 | free_kset: | |
1116 | kset_unregister(f2fs_kset); | |
1117 | free_checkpoint_caches: | |
1118 | destroy_checkpoint_caches(); | |
1119 | free_gc_caches: | |
1120 | destroy_gc_caches(); | |
7fd9e544 JK |
1121 | free_segment_manager_caches: |
1122 | destroy_segment_manager_caches(); | |
9890ff3f ZH |
1123 | free_node_manager_caches: |
1124 | destroy_node_manager_caches(); | |
1125 | free_inodecache: | |
1126 | destroy_inodecache(); | |
aff063e2 JK |
1127 | fail: |
1128 | return err; | |
1129 | } | |
1130 | ||
1131 | static void __exit exit_f2fs_fs(void) | |
1132 | { | |
5e176d54 | 1133 | remove_proc_entry("fs/f2fs", NULL); |
4589d25d | 1134 | f2fs_destroy_root_stats(); |
aff063e2 JK |
1135 | unregister_filesystem(&f2fs_fs_type); |
1136 | destroy_checkpoint_caches(); | |
1137 | destroy_gc_caches(); | |
1138 | destroy_node_manager_caches(); | |
1139 | destroy_inodecache(); | |
b59d0bae | 1140 | kset_unregister(f2fs_kset); |
aff063e2 JK |
1141 | } |
1142 | ||
1143 | module_init(init_f2fs_fs) | |
1144 | module_exit(exit_f2fs_fs) | |
1145 | ||
1146 | MODULE_AUTHOR("Samsung Electronics's Praesto Team"); | |
1147 | MODULE_DESCRIPTION("Flash Friendly File System"); | |
1148 | MODULE_LICENSE("GPL"); |