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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, |
6b4afdd7 | 54 | Opt_flush_merge, |
aff063e2 JK |
55 | Opt_err, |
56 | }; | |
57 | ||
58 | static match_table_t f2fs_tokens = { | |
696c018c | 59 | {Opt_gc_background, "background_gc=%s"}, |
aff063e2 JK |
60 | {Opt_disable_roll_forward, "disable_roll_forward"}, |
61 | {Opt_discard, "discard"}, | |
62 | {Opt_noheap, "no_heap"}, | |
4058c511 | 63 | {Opt_user_xattr, "user_xattr"}, |
aff063e2 | 64 | {Opt_nouser_xattr, "nouser_xattr"}, |
4058c511 | 65 | {Opt_acl, "acl"}, |
aff063e2 JK |
66 | {Opt_noacl, "noacl"}, |
67 | {Opt_active_logs, "active_logs=%u"}, | |
68 | {Opt_disable_ext_identify, "disable_ext_identify"}, | |
444c580f | 69 | {Opt_inline_xattr, "inline_xattr"}, |
8274de77 | 70 | {Opt_inline_data, "inline_data"}, |
6b4afdd7 | 71 | {Opt_flush_merge, "flush_merge"}, |
aff063e2 JK |
72 | {Opt_err, NULL}, |
73 | }; | |
74 | ||
b59d0bae | 75 | /* Sysfs support for f2fs */ |
ea91e9b0 JK |
76 | enum { |
77 | GC_THREAD, /* struct f2fs_gc_thread */ | |
78 | SM_INFO, /* struct f2fs_sm_info */ | |
cdfc41c1 | 79 | NM_INFO, /* struct f2fs_nm_info */ |
b1c57c1c | 80 | F2FS_SBI, /* struct f2fs_sb_info */ |
ea91e9b0 JK |
81 | }; |
82 | ||
b59d0bae NJ |
83 | struct f2fs_attr { |
84 | struct attribute attr; | |
85 | ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *); | |
86 | ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *, | |
87 | const char *, size_t); | |
ea91e9b0 | 88 | int struct_type; |
b59d0bae NJ |
89 | int offset; |
90 | }; | |
91 | ||
ea91e9b0 JK |
92 | static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type) |
93 | { | |
94 | if (struct_type == GC_THREAD) | |
95 | return (unsigned char *)sbi->gc_thread; | |
96 | else if (struct_type == SM_INFO) | |
97 | return (unsigned char *)SM_I(sbi); | |
cdfc41c1 JK |
98 | else if (struct_type == NM_INFO) |
99 | return (unsigned char *)NM_I(sbi); | |
b1c57c1c JK |
100 | else if (struct_type == F2FS_SBI) |
101 | return (unsigned char *)sbi; | |
ea91e9b0 JK |
102 | return NULL; |
103 | } | |
104 | ||
b59d0bae NJ |
105 | static ssize_t f2fs_sbi_show(struct f2fs_attr *a, |
106 | struct f2fs_sb_info *sbi, char *buf) | |
107 | { | |
ea91e9b0 | 108 | unsigned char *ptr = NULL; |
b59d0bae NJ |
109 | unsigned int *ui; |
110 | ||
ea91e9b0 JK |
111 | ptr = __struct_ptr(sbi, a->struct_type); |
112 | if (!ptr) | |
b59d0bae NJ |
113 | return -EINVAL; |
114 | ||
ea91e9b0 | 115 | ui = (unsigned int *)(ptr + a->offset); |
b59d0bae NJ |
116 | |
117 | return snprintf(buf, PAGE_SIZE, "%u\n", *ui); | |
118 | } | |
119 | ||
120 | static ssize_t f2fs_sbi_store(struct f2fs_attr *a, | |
121 | struct f2fs_sb_info *sbi, | |
122 | const char *buf, size_t count) | |
123 | { | |
ea91e9b0 | 124 | unsigned char *ptr; |
b59d0bae NJ |
125 | unsigned long t; |
126 | unsigned int *ui; | |
127 | ssize_t ret; | |
128 | ||
ea91e9b0 JK |
129 | ptr = __struct_ptr(sbi, a->struct_type); |
130 | if (!ptr) | |
b59d0bae NJ |
131 | return -EINVAL; |
132 | ||
ea91e9b0 | 133 | ui = (unsigned int *)(ptr + a->offset); |
b59d0bae NJ |
134 | |
135 | ret = kstrtoul(skip_spaces(buf), 0, &t); | |
136 | if (ret < 0) | |
137 | return ret; | |
138 | *ui = t; | |
139 | return count; | |
140 | } | |
141 | ||
142 | static ssize_t f2fs_attr_show(struct kobject *kobj, | |
143 | struct attribute *attr, char *buf) | |
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->show ? a->show(a, sbi, buf) : 0; | |
150 | } | |
151 | ||
152 | static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr, | |
153 | const char *buf, size_t len) | |
154 | { | |
155 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, | |
156 | s_kobj); | |
157 | struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); | |
158 | ||
159 | return a->store ? a->store(a, sbi, buf, len) : 0; | |
160 | } | |
161 | ||
162 | static void f2fs_sb_release(struct kobject *kobj) | |
163 | { | |
164 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, | |
165 | s_kobj); | |
166 | complete(&sbi->s_kobj_unregister); | |
167 | } | |
168 | ||
ea91e9b0 | 169 | #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \ |
b59d0bae NJ |
170 | static struct f2fs_attr f2fs_attr_##_name = { \ |
171 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
172 | .show = _show, \ | |
173 | .store = _store, \ | |
ea91e9b0 JK |
174 | .struct_type = _struct_type, \ |
175 | .offset = _offset \ | |
b59d0bae NJ |
176 | } |
177 | ||
ea91e9b0 JK |
178 | #define F2FS_RW_ATTR(struct_type, struct_name, name, elname) \ |
179 | F2FS_ATTR_OFFSET(struct_type, name, 0644, \ | |
180 | f2fs_sbi_show, f2fs_sbi_store, \ | |
181 | offsetof(struct struct_name, elname)) | |
b59d0bae | 182 | |
ea91e9b0 JK |
183 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time); |
184 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time); | |
185 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time); | |
186 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_idle, gc_idle); | |
187 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments); | |
7ac8c3b0 | 188 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, max_small_discards, max_discards); |
216fbd64 JK |
189 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy); |
190 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util); | |
cdfc41c1 | 191 | F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh); |
b1c57c1c | 192 | F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search); |
ab9fa662 | 193 | F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level); |
b59d0bae NJ |
194 | |
195 | #define ATTR_LIST(name) (&f2fs_attr_##name.attr) | |
196 | static struct attribute *f2fs_attrs[] = { | |
197 | ATTR_LIST(gc_min_sleep_time), | |
198 | ATTR_LIST(gc_max_sleep_time), | |
199 | ATTR_LIST(gc_no_gc_sleep_time), | |
d2dc095f | 200 | ATTR_LIST(gc_idle), |
ea91e9b0 | 201 | ATTR_LIST(reclaim_segments), |
7ac8c3b0 | 202 | ATTR_LIST(max_small_discards), |
216fbd64 JK |
203 | ATTR_LIST(ipu_policy), |
204 | ATTR_LIST(min_ipu_util), | |
b1c57c1c | 205 | ATTR_LIST(max_victim_search), |
ab9fa662 | 206 | ATTR_LIST(dir_level), |
cdfc41c1 | 207 | ATTR_LIST(ram_thresh), |
b59d0bae NJ |
208 | NULL, |
209 | }; | |
210 | ||
211 | static const struct sysfs_ops f2fs_attr_ops = { | |
212 | .show = f2fs_attr_show, | |
213 | .store = f2fs_attr_store, | |
214 | }; | |
215 | ||
216 | static struct kobj_type f2fs_ktype = { | |
217 | .default_attrs = f2fs_attrs, | |
218 | .sysfs_ops = &f2fs_attr_ops, | |
219 | .release = f2fs_sb_release, | |
220 | }; | |
221 | ||
a07ef784 NJ |
222 | void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...) |
223 | { | |
224 | struct va_format vaf; | |
225 | va_list args; | |
226 | ||
227 | va_start(args, fmt); | |
228 | vaf.fmt = fmt; | |
229 | vaf.va = &args; | |
230 | printk("%sF2FS-fs (%s): %pV\n", level, sb->s_id, &vaf); | |
231 | va_end(args); | |
232 | } | |
233 | ||
aff063e2 JK |
234 | static void init_once(void *foo) |
235 | { | |
236 | struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo; | |
237 | ||
aff063e2 JK |
238 | inode_init_once(&fi->vfs_inode); |
239 | } | |
240 | ||
696c018c NJ |
241 | static int parse_options(struct super_block *sb, char *options) |
242 | { | |
243 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
244 | substring_t args[MAX_OPT_ARGS]; | |
245 | char *p, *name; | |
246 | int arg = 0; | |
247 | ||
248 | if (!options) | |
249 | return 0; | |
250 | ||
251 | while ((p = strsep(&options, ",")) != NULL) { | |
252 | int token; | |
253 | if (!*p) | |
254 | continue; | |
255 | /* | |
256 | * Initialize args struct so we know whether arg was | |
257 | * found; some options take optional arguments. | |
258 | */ | |
259 | args[0].to = args[0].from = NULL; | |
260 | token = match_token(p, f2fs_tokens, args); | |
261 | ||
262 | switch (token) { | |
263 | case Opt_gc_background: | |
264 | name = match_strdup(&args[0]); | |
265 | ||
266 | if (!name) | |
267 | return -ENOMEM; | |
04c09388 | 268 | if (strlen(name) == 2 && !strncmp(name, "on", 2)) |
696c018c | 269 | set_opt(sbi, BG_GC); |
04c09388 | 270 | else if (strlen(name) == 3 && !strncmp(name, "off", 3)) |
696c018c NJ |
271 | clear_opt(sbi, BG_GC); |
272 | else { | |
273 | kfree(name); | |
274 | return -EINVAL; | |
275 | } | |
276 | kfree(name); | |
277 | break; | |
278 | case Opt_disable_roll_forward: | |
279 | set_opt(sbi, DISABLE_ROLL_FORWARD); | |
280 | break; | |
281 | case Opt_discard: | |
282 | set_opt(sbi, DISCARD); | |
283 | break; | |
284 | case Opt_noheap: | |
285 | set_opt(sbi, NOHEAP); | |
286 | break; | |
287 | #ifdef CONFIG_F2FS_FS_XATTR | |
4058c511 KA |
288 | case Opt_user_xattr: |
289 | set_opt(sbi, XATTR_USER); | |
290 | break; | |
696c018c NJ |
291 | case Opt_nouser_xattr: |
292 | clear_opt(sbi, XATTR_USER); | |
293 | break; | |
444c580f JK |
294 | case Opt_inline_xattr: |
295 | set_opt(sbi, INLINE_XATTR); | |
296 | break; | |
696c018c | 297 | #else |
4058c511 KA |
298 | case Opt_user_xattr: |
299 | f2fs_msg(sb, KERN_INFO, | |
300 | "user_xattr options not supported"); | |
301 | break; | |
696c018c NJ |
302 | case Opt_nouser_xattr: |
303 | f2fs_msg(sb, KERN_INFO, | |
304 | "nouser_xattr options not supported"); | |
305 | break; | |
444c580f JK |
306 | case Opt_inline_xattr: |
307 | f2fs_msg(sb, KERN_INFO, | |
308 | "inline_xattr options not supported"); | |
309 | break; | |
696c018c NJ |
310 | #endif |
311 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
4058c511 KA |
312 | case Opt_acl: |
313 | set_opt(sbi, POSIX_ACL); | |
314 | break; | |
696c018c NJ |
315 | case Opt_noacl: |
316 | clear_opt(sbi, POSIX_ACL); | |
317 | break; | |
318 | #else | |
4058c511 KA |
319 | case Opt_acl: |
320 | f2fs_msg(sb, KERN_INFO, "acl options not supported"); | |
321 | break; | |
696c018c NJ |
322 | case Opt_noacl: |
323 | f2fs_msg(sb, KERN_INFO, "noacl options not supported"); | |
324 | break; | |
325 | #endif | |
326 | case Opt_active_logs: | |
327 | if (args->from && match_int(args, &arg)) | |
328 | return -EINVAL; | |
329 | if (arg != 2 && arg != 4 && arg != NR_CURSEG_TYPE) | |
330 | return -EINVAL; | |
331 | sbi->active_logs = arg; | |
332 | break; | |
333 | case Opt_disable_ext_identify: | |
334 | set_opt(sbi, DISABLE_EXT_IDENTIFY); | |
335 | break; | |
8274de77 HL |
336 | case Opt_inline_data: |
337 | set_opt(sbi, INLINE_DATA); | |
338 | break; | |
6b4afdd7 JK |
339 | case Opt_flush_merge: |
340 | set_opt(sbi, FLUSH_MERGE); | |
341 | break; | |
696c018c NJ |
342 | default: |
343 | f2fs_msg(sb, KERN_ERR, | |
344 | "Unrecognized mount option \"%s\" or missing value", | |
345 | p); | |
346 | return -EINVAL; | |
347 | } | |
348 | } | |
349 | return 0; | |
350 | } | |
351 | ||
aff063e2 JK |
352 | static struct inode *f2fs_alloc_inode(struct super_block *sb) |
353 | { | |
354 | struct f2fs_inode_info *fi; | |
355 | ||
a0acdfe0 | 356 | fi = kmem_cache_alloc(f2fs_inode_cachep, GFP_F2FS_ZERO); |
aff063e2 JK |
357 | if (!fi) |
358 | return NULL; | |
359 | ||
360 | init_once((void *) fi); | |
361 | ||
434720fa | 362 | /* Initialize f2fs-specific inode info */ |
aff063e2 JK |
363 | fi->vfs_inode.i_version = 1; |
364 | atomic_set(&fi->dirty_dents, 0); | |
365 | fi->i_current_depth = 1; | |
366 | fi->i_advise = 0; | |
367 | rwlock_init(&fi->ext.ext_lock); | |
d928bfbf | 368 | init_rwsem(&fi->i_sem); |
aff063e2 JK |
369 | |
370 | set_inode_flag(fi, FI_NEW_INODE); | |
371 | ||
444c580f JK |
372 | if (test_opt(F2FS_SB(sb), INLINE_XATTR)) |
373 | set_inode_flag(fi, FI_INLINE_XATTR); | |
374 | ||
ab9fa662 JK |
375 | /* Will be used by directory only */ |
376 | fi->i_dir_level = F2FS_SB(sb)->dir_level; | |
377 | ||
aff063e2 JK |
378 | return &fi->vfs_inode; |
379 | } | |
380 | ||
531ad7d5 JK |
381 | static int f2fs_drop_inode(struct inode *inode) |
382 | { | |
383 | /* | |
384 | * This is to avoid a deadlock condition like below. | |
385 | * writeback_single_inode(inode) | |
386 | * - f2fs_write_data_page | |
387 | * - f2fs_gc -> iput -> evict | |
388 | * - inode_wait_for_writeback(inode) | |
389 | */ | |
390 | if (!inode_unhashed(inode) && inode->i_state & I_SYNC) | |
391 | return 0; | |
392 | return generic_drop_inode(inode); | |
393 | } | |
394 | ||
b3783873 JK |
395 | /* |
396 | * f2fs_dirty_inode() is called from __mark_inode_dirty() | |
397 | * | |
398 | * We should call set_dirty_inode to write the dirty inode through write_inode. | |
399 | */ | |
400 | static void f2fs_dirty_inode(struct inode *inode, int flags) | |
401 | { | |
402 | set_inode_flag(F2FS_I(inode), FI_DIRTY_INODE); | |
b3783873 JK |
403 | } |
404 | ||
aff063e2 JK |
405 | static void f2fs_i_callback(struct rcu_head *head) |
406 | { | |
407 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
408 | kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode)); | |
409 | } | |
410 | ||
25ca923b | 411 | static void f2fs_destroy_inode(struct inode *inode) |
aff063e2 JK |
412 | { |
413 | call_rcu(&inode->i_rcu, f2fs_i_callback); | |
414 | } | |
415 | ||
416 | static void f2fs_put_super(struct super_block *sb) | |
417 | { | |
418 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
419 | ||
5e176d54 JK |
420 | if (sbi->s_proc) { |
421 | remove_proc_entry("segment_info", sbi->s_proc); | |
422 | remove_proc_entry(sb->s_id, f2fs_proc_root); | |
423 | } | |
b59d0bae | 424 | kobject_del(&sbi->s_kobj); |
5e176d54 | 425 | |
aff063e2 JK |
426 | f2fs_destroy_stats(sbi); |
427 | stop_gc_thread(sbi); | |
428 | ||
5887d291 JK |
429 | /* We don't need to do checkpoint when it's clean */ |
430 | if (sbi->s_dirty && get_pages(sbi, F2FS_DIRTY_NODES)) | |
431 | write_checkpoint(sbi, true); | |
aff063e2 JK |
432 | |
433 | iput(sbi->node_inode); | |
434 | iput(sbi->meta_inode); | |
435 | ||
436 | /* destroy f2fs internal modules */ | |
437 | destroy_node_manager(sbi); | |
438 | destroy_segment_manager(sbi); | |
439 | ||
440 | kfree(sbi->ckpt); | |
b59d0bae NJ |
441 | kobject_put(&sbi->s_kobj); |
442 | wait_for_completion(&sbi->s_kobj_unregister); | |
aff063e2 JK |
443 | |
444 | sb->s_fs_info = NULL; | |
445 | brelse(sbi->raw_super_buf); | |
446 | kfree(sbi); | |
447 | } | |
448 | ||
449 | int f2fs_sync_fs(struct super_block *sb, int sync) | |
450 | { | |
451 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
aff063e2 | 452 | |
a2a4a7e4 NJ |
453 | trace_f2fs_sync_fs(sb, sync); |
454 | ||
aff063e2 JK |
455 | if (!sbi->s_dirty && !get_pages(sbi, F2FS_DIRTY_NODES)) |
456 | return 0; | |
457 | ||
b7473754 JK |
458 | if (sync) { |
459 | mutex_lock(&sbi->gc_mutex); | |
43727527 | 460 | write_checkpoint(sbi, false); |
b7473754 JK |
461 | mutex_unlock(&sbi->gc_mutex); |
462 | } else { | |
7d82db83 | 463 | f2fs_balance_fs(sbi); |
b7473754 | 464 | } |
aff063e2 | 465 | |
64c576fe | 466 | return 0; |
aff063e2 JK |
467 | } |
468 | ||
d6212a5f CL |
469 | static int f2fs_freeze(struct super_block *sb) |
470 | { | |
471 | int err; | |
472 | ||
77888c1e | 473 | if (f2fs_readonly(sb)) |
d6212a5f CL |
474 | return 0; |
475 | ||
476 | err = f2fs_sync_fs(sb, 1); | |
477 | return err; | |
478 | } | |
479 | ||
480 | static int f2fs_unfreeze(struct super_block *sb) | |
481 | { | |
482 | return 0; | |
483 | } | |
484 | ||
aff063e2 JK |
485 | static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf) |
486 | { | |
487 | struct super_block *sb = dentry->d_sb; | |
488 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
489 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); | |
490 | block_t total_count, user_block_count, start_count, ovp_count; | |
491 | ||
492 | total_count = le64_to_cpu(sbi->raw_super->block_count); | |
493 | user_block_count = sbi->user_block_count; | |
494 | start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr); | |
495 | ovp_count = SM_I(sbi)->ovp_segments << sbi->log_blocks_per_seg; | |
496 | buf->f_type = F2FS_SUPER_MAGIC; | |
497 | buf->f_bsize = sbi->blocksize; | |
498 | ||
499 | buf->f_blocks = total_count - start_count; | |
500 | buf->f_bfree = buf->f_blocks - valid_user_blocks(sbi) - ovp_count; | |
501 | buf->f_bavail = user_block_count - valid_user_blocks(sbi); | |
502 | ||
1362b5e3 JK |
503 | buf->f_files = sbi->total_node_count; |
504 | buf->f_ffree = sbi->total_node_count - valid_inode_count(sbi); | |
aff063e2 | 505 | |
5a20d339 | 506 | buf->f_namelen = F2FS_NAME_LEN; |
aff063e2 JK |
507 | buf->f_fsid.val[0] = (u32)id; |
508 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
509 | ||
510 | return 0; | |
511 | } | |
512 | ||
513 | static int f2fs_show_options(struct seq_file *seq, struct dentry *root) | |
514 | { | |
515 | struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb); | |
516 | ||
b270ad6f | 517 | if (!f2fs_readonly(sbi->sb) && test_opt(sbi, BG_GC)) |
696c018c | 518 | seq_printf(seq, ",background_gc=%s", "on"); |
aff063e2 | 519 | else |
696c018c | 520 | seq_printf(seq, ",background_gc=%s", "off"); |
aff063e2 JK |
521 | if (test_opt(sbi, DISABLE_ROLL_FORWARD)) |
522 | seq_puts(seq, ",disable_roll_forward"); | |
523 | if (test_opt(sbi, DISCARD)) | |
524 | seq_puts(seq, ",discard"); | |
525 | if (test_opt(sbi, NOHEAP)) | |
526 | seq_puts(seq, ",no_heap_alloc"); | |
527 | #ifdef CONFIG_F2FS_FS_XATTR | |
528 | if (test_opt(sbi, XATTR_USER)) | |
529 | seq_puts(seq, ",user_xattr"); | |
530 | else | |
531 | seq_puts(seq, ",nouser_xattr"); | |
444c580f JK |
532 | if (test_opt(sbi, INLINE_XATTR)) |
533 | seq_puts(seq, ",inline_xattr"); | |
aff063e2 JK |
534 | #endif |
535 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
536 | if (test_opt(sbi, POSIX_ACL)) | |
537 | seq_puts(seq, ",acl"); | |
538 | else | |
539 | seq_puts(seq, ",noacl"); | |
540 | #endif | |
541 | if (test_opt(sbi, DISABLE_EXT_IDENTIFY)) | |
aa43507f | 542 | seq_puts(seq, ",disable_ext_identify"); |
8274de77 HL |
543 | if (test_opt(sbi, INLINE_DATA)) |
544 | seq_puts(seq, ",inline_data"); | |
b270ad6f | 545 | if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE)) |
6b4afdd7 | 546 | seq_puts(seq, ",flush_merge"); |
aff063e2 JK |
547 | seq_printf(seq, ",active_logs=%u", sbi->active_logs); |
548 | ||
549 | return 0; | |
550 | } | |
551 | ||
5e176d54 JK |
552 | static int segment_info_seq_show(struct seq_file *seq, void *offset) |
553 | { | |
554 | struct super_block *sb = seq->private; | |
555 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
6c311ec6 CF |
556 | unsigned int total_segs = |
557 | le32_to_cpu(sbi->raw_super->segment_count_main); | |
5e176d54 JK |
558 | int i; |
559 | ||
90aa6dc9 CY |
560 | seq_puts(seq, "format: segment_type|valid_blocks\n" |
561 | "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n"); | |
562 | ||
5e176d54 | 563 | for (i = 0; i < total_segs; i++) { |
90aa6dc9 CY |
564 | struct seg_entry *se = get_seg_entry(sbi, i); |
565 | ||
566 | if ((i % 10) == 0) | |
567 | seq_printf(seq, "%-5d", i); | |
568 | seq_printf(seq, "%d|%-3u", se->type, | |
569 | get_valid_blocks(sbi, i, 1)); | |
46c04366 GZ |
570 | if ((i % 10) == 9 || i == (total_segs - 1)) |
571 | seq_putc(seq, '\n'); | |
5e176d54 | 572 | else |
46c04366 | 573 | seq_putc(seq, ' '); |
5e176d54 | 574 | } |
46c04366 | 575 | |
5e176d54 JK |
576 | return 0; |
577 | } | |
578 | ||
579 | static int segment_info_open_fs(struct inode *inode, struct file *file) | |
580 | { | |
581 | return single_open(file, segment_info_seq_show, PDE_DATA(inode)); | |
582 | } | |
583 | ||
584 | static const struct file_operations f2fs_seq_segment_info_fops = { | |
585 | .owner = THIS_MODULE, | |
586 | .open = segment_info_open_fs, | |
587 | .read = seq_read, | |
588 | .llseek = seq_lseek, | |
589 | .release = single_release, | |
590 | }; | |
591 | ||
696c018c NJ |
592 | static int f2fs_remount(struct super_block *sb, int *flags, char *data) |
593 | { | |
594 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
595 | struct f2fs_mount_info org_mount_opt; | |
596 | int err, active_logs; | |
876dc59e GZ |
597 | bool need_restart_gc = false; |
598 | bool need_stop_gc = false; | |
696c018c | 599 | |
02b9984d TT |
600 | sync_filesystem(sb); |
601 | ||
696c018c NJ |
602 | /* |
603 | * Save the old mount options in case we | |
604 | * need to restore them. | |
605 | */ | |
606 | org_mount_opt = sbi->mount_opt; | |
607 | active_logs = sbi->active_logs; | |
608 | ||
609 | /* parse mount options */ | |
610 | err = parse_options(sb, data); | |
611 | if (err) | |
612 | goto restore_opts; | |
613 | ||
614 | /* | |
615 | * Previous and new state of filesystem is RO, | |
876dc59e | 616 | * so skip checking GC and FLUSH_MERGE conditions. |
696c018c NJ |
617 | */ |
618 | if ((sb->s_flags & MS_RDONLY) && (*flags & MS_RDONLY)) | |
619 | goto skip; | |
620 | ||
621 | /* | |
622 | * We stop the GC thread if FS is mounted as RO | |
623 | * or if background_gc = off is passed in mount | |
624 | * option. Also sync the filesystem. | |
625 | */ | |
626 | if ((*flags & MS_RDONLY) || !test_opt(sbi, BG_GC)) { | |
627 | if (sbi->gc_thread) { | |
628 | stop_gc_thread(sbi); | |
629 | f2fs_sync_fs(sb, 1); | |
876dc59e | 630 | need_restart_gc = true; |
696c018c NJ |
631 | } |
632 | } else if (test_opt(sbi, BG_GC) && !sbi->gc_thread) { | |
633 | err = start_gc_thread(sbi); | |
634 | if (err) | |
635 | goto restore_opts; | |
876dc59e GZ |
636 | need_stop_gc = true; |
637 | } | |
638 | ||
639 | /* | |
640 | * We stop issue flush thread if FS is mounted as RO | |
641 | * or if flush_merge is not passed in mount option. | |
642 | */ | |
643 | if ((*flags & MS_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) { | |
a688b9d9 GZ |
644 | struct flush_cmd_control *fcc = |
645 | sbi->sm_info->cmd_control_info; | |
646 | ||
647 | if (fcc && fcc->f2fs_issue_flush) | |
648 | kthread_stop(fcc->f2fs_issue_flush); | |
649 | kfree(fcc); | |
650 | sbi->sm_info->cmd_control_info = NULL; | |
651 | } else if (test_opt(sbi, FLUSH_MERGE) && | |
652 | !sbi->sm_info->cmd_control_info) { | |
653 | dev_t dev = sbi->sb->s_bdev->bd_dev; | |
654 | struct flush_cmd_control *fcc = | |
655 | kzalloc(sizeof(struct flush_cmd_control), GFP_KERNEL); | |
656 | ||
657 | if (!fcc) { | |
658 | err = -ENOMEM; | |
659 | goto restore_gc; | |
660 | } | |
661 | spin_lock_init(&fcc->issue_lock); | |
662 | init_waitqueue_head(&fcc->flush_wait_queue); | |
663 | fcc->f2fs_issue_flush = kthread_run(issue_flush_thread, sbi, | |
876dc59e | 664 | "f2fs_flush-%u:%u", MAJOR(dev), MINOR(dev)); |
a688b9d9 GZ |
665 | if (IS_ERR(fcc->f2fs_issue_flush)) { |
666 | err = PTR_ERR(fcc->f2fs_issue_flush); | |
667 | kfree(fcc); | |
668 | goto restore_gc; | |
876dc59e | 669 | } |
a688b9d9 | 670 | sbi->sm_info->cmd_control_info = fcc; |
696c018c NJ |
671 | } |
672 | skip: | |
673 | /* Update the POSIXACL Flag */ | |
674 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
675 | (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0); | |
676 | return 0; | |
876dc59e GZ |
677 | restore_gc: |
678 | if (need_restart_gc) { | |
679 | if (start_gc_thread(sbi)) | |
680 | f2fs_msg(sbi->sb, KERN_WARNING, | |
681 | "background gc thread is stop"); | |
682 | } else if (need_stop_gc) { | |
683 | stop_gc_thread(sbi); | |
684 | } | |
696c018c NJ |
685 | restore_opts: |
686 | sbi->mount_opt = org_mount_opt; | |
687 | sbi->active_logs = active_logs; | |
688 | return err; | |
689 | } | |
690 | ||
aff063e2 JK |
691 | static struct super_operations f2fs_sops = { |
692 | .alloc_inode = f2fs_alloc_inode, | |
531ad7d5 | 693 | .drop_inode = f2fs_drop_inode, |
aff063e2 JK |
694 | .destroy_inode = f2fs_destroy_inode, |
695 | .write_inode = f2fs_write_inode, | |
b3783873 | 696 | .dirty_inode = f2fs_dirty_inode, |
aff063e2 JK |
697 | .show_options = f2fs_show_options, |
698 | .evict_inode = f2fs_evict_inode, | |
699 | .put_super = f2fs_put_super, | |
700 | .sync_fs = f2fs_sync_fs, | |
d6212a5f CL |
701 | .freeze_fs = f2fs_freeze, |
702 | .unfreeze_fs = f2fs_unfreeze, | |
aff063e2 | 703 | .statfs = f2fs_statfs, |
696c018c | 704 | .remount_fs = f2fs_remount, |
aff063e2 JK |
705 | }; |
706 | ||
707 | static struct inode *f2fs_nfs_get_inode(struct super_block *sb, | |
708 | u64 ino, u32 generation) | |
709 | { | |
710 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
711 | struct inode *inode; | |
712 | ||
6bacf52f | 713 | if (unlikely(ino < F2FS_ROOT_INO(sbi))) |
aff063e2 | 714 | return ERR_PTR(-ESTALE); |
910bb12d CY |
715 | if (unlikely(ino >= NM_I(sbi)->max_nid)) |
716 | return ERR_PTR(-ESTALE); | |
aff063e2 JK |
717 | |
718 | /* | |
719 | * f2fs_iget isn't quite right if the inode is currently unallocated! | |
720 | * However f2fs_iget currently does appropriate checks to handle stale | |
721 | * inodes so everything is OK. | |
722 | */ | |
723 | inode = f2fs_iget(sb, ino); | |
724 | if (IS_ERR(inode)) | |
725 | return ERR_CAST(inode); | |
6bacf52f | 726 | if (unlikely(generation && inode->i_generation != generation)) { |
aff063e2 JK |
727 | /* we didn't find the right inode.. */ |
728 | iput(inode); | |
729 | return ERR_PTR(-ESTALE); | |
730 | } | |
731 | return inode; | |
732 | } | |
733 | ||
734 | static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
735 | int fh_len, int fh_type) | |
736 | { | |
737 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
738 | f2fs_nfs_get_inode); | |
739 | } | |
740 | ||
741 | static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid, | |
742 | int fh_len, int fh_type) | |
743 | { | |
744 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
745 | f2fs_nfs_get_inode); | |
746 | } | |
747 | ||
748 | static const struct export_operations f2fs_export_ops = { | |
749 | .fh_to_dentry = f2fs_fh_to_dentry, | |
750 | .fh_to_parent = f2fs_fh_to_parent, | |
751 | .get_parent = f2fs_get_parent, | |
752 | }; | |
753 | ||
aff063e2 JK |
754 | static loff_t max_file_size(unsigned bits) |
755 | { | |
de93653f | 756 | loff_t result = (DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS); |
aff063e2 JK |
757 | loff_t leaf_count = ADDRS_PER_BLOCK; |
758 | ||
759 | /* two direct node blocks */ | |
760 | result += (leaf_count * 2); | |
761 | ||
762 | /* two indirect node blocks */ | |
763 | leaf_count *= NIDS_PER_BLOCK; | |
764 | result += (leaf_count * 2); | |
765 | ||
766 | /* one double indirect node block */ | |
767 | leaf_count *= NIDS_PER_BLOCK; | |
768 | result += leaf_count; | |
769 | ||
770 | result <<= bits; | |
771 | return result; | |
772 | } | |
773 | ||
a07ef784 NJ |
774 | static int sanity_check_raw_super(struct super_block *sb, |
775 | struct f2fs_super_block *raw_super) | |
aff063e2 JK |
776 | { |
777 | unsigned int blocksize; | |
778 | ||
a07ef784 NJ |
779 | if (F2FS_SUPER_MAGIC != le32_to_cpu(raw_super->magic)) { |
780 | f2fs_msg(sb, KERN_INFO, | |
781 | "Magic Mismatch, valid(0x%x) - read(0x%x)", | |
782 | F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic)); | |
aff063e2 | 783 | return 1; |
a07ef784 | 784 | } |
aff063e2 | 785 | |
5c9b4692 | 786 | /* Currently, support only 4KB page cache size */ |
787 | if (F2FS_BLKSIZE != PAGE_CACHE_SIZE) { | |
788 | f2fs_msg(sb, KERN_INFO, | |
14d7e9de | 789 | "Invalid page_cache_size (%lu), supports only 4KB\n", |
5c9b4692 | 790 | PAGE_CACHE_SIZE); |
791 | return 1; | |
792 | } | |
793 | ||
aff063e2 JK |
794 | /* Currently, support only 4KB block size */ |
795 | blocksize = 1 << le32_to_cpu(raw_super->log_blocksize); | |
5c9b4692 | 796 | if (blocksize != F2FS_BLKSIZE) { |
a07ef784 NJ |
797 | f2fs_msg(sb, KERN_INFO, |
798 | "Invalid blocksize (%u), supports only 4KB\n", | |
799 | blocksize); | |
aff063e2 | 800 | return 1; |
a07ef784 | 801 | } |
5c9b4692 | 802 | |
aff063e2 | 803 | if (le32_to_cpu(raw_super->log_sectorsize) != |
a07ef784 NJ |
804 | F2FS_LOG_SECTOR_SIZE) { |
805 | f2fs_msg(sb, KERN_INFO, "Invalid log sectorsize"); | |
aff063e2 | 806 | return 1; |
a07ef784 | 807 | } |
aff063e2 | 808 | if (le32_to_cpu(raw_super->log_sectors_per_block) != |
a07ef784 NJ |
809 | F2FS_LOG_SECTORS_PER_BLOCK) { |
810 | f2fs_msg(sb, KERN_INFO, "Invalid log sectors per block"); | |
aff063e2 | 811 | return 1; |
a07ef784 | 812 | } |
aff063e2 JK |
813 | return 0; |
814 | } | |
815 | ||
577e3495 | 816 | static int sanity_check_ckpt(struct f2fs_sb_info *sbi) |
aff063e2 JK |
817 | { |
818 | unsigned int total, fsmeta; | |
577e3495 JK |
819 | struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); |
820 | struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); | |
aff063e2 JK |
821 | |
822 | total = le32_to_cpu(raw_super->segment_count); | |
823 | fsmeta = le32_to_cpu(raw_super->segment_count_ckpt); | |
824 | fsmeta += le32_to_cpu(raw_super->segment_count_sit); | |
825 | fsmeta += le32_to_cpu(raw_super->segment_count_nat); | |
826 | fsmeta += le32_to_cpu(ckpt->rsvd_segment_count); | |
827 | fsmeta += le32_to_cpu(raw_super->segment_count_ssa); | |
828 | ||
6bacf52f | 829 | if (unlikely(fsmeta >= total)) |
aff063e2 | 830 | return 1; |
577e3495 | 831 | |
6bacf52f | 832 | if (unlikely(is_set_ckpt_flags(ckpt, CP_ERROR_FLAG))) { |
577e3495 JK |
833 | f2fs_msg(sbi->sb, KERN_ERR, "A bug case: need to run fsck"); |
834 | return 1; | |
835 | } | |
aff063e2 JK |
836 | return 0; |
837 | } | |
838 | ||
839 | static void init_sb_info(struct f2fs_sb_info *sbi) | |
840 | { | |
841 | struct f2fs_super_block *raw_super = sbi->raw_super; | |
842 | int i; | |
843 | ||
844 | sbi->log_sectors_per_block = | |
845 | le32_to_cpu(raw_super->log_sectors_per_block); | |
846 | sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize); | |
847 | sbi->blocksize = 1 << sbi->log_blocksize; | |
848 | sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg); | |
849 | sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg; | |
850 | sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec); | |
851 | sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone); | |
852 | sbi->total_sections = le32_to_cpu(raw_super->section_count); | |
853 | sbi->total_node_count = | |
854 | (le32_to_cpu(raw_super->segment_count_nat) / 2) | |
855 | * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK; | |
856 | sbi->root_ino_num = le32_to_cpu(raw_super->root_ino); | |
857 | sbi->node_ino_num = le32_to_cpu(raw_super->node_ino); | |
858 | sbi->meta_ino_num = le32_to_cpu(raw_super->meta_ino); | |
5ec4e49f | 859 | sbi->cur_victim_sec = NULL_SECNO; |
b1c57c1c | 860 | sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH; |
aff063e2 JK |
861 | |
862 | for (i = 0; i < NR_COUNT_TYPE; i++) | |
863 | atomic_set(&sbi->nr_pages[i], 0); | |
ab9fa662 JK |
864 | |
865 | sbi->dir_level = DEF_DIR_LEVEL; | |
aff063e2 JK |
866 | } |
867 | ||
9076a75f GZ |
868 | /* |
869 | * Read f2fs raw super block. | |
870 | * Because we have two copies of super block, so read the first one at first, | |
871 | * if the first one is invalid, move to read the second one. | |
872 | */ | |
873 | static int read_raw_super_block(struct super_block *sb, | |
874 | struct f2fs_super_block **raw_super, | |
875 | struct buffer_head **raw_super_buf) | |
14d7e9de | 876 | { |
9076a75f | 877 | int block = 0; |
14d7e9de | 878 | |
9076a75f | 879 | retry: |
14d7e9de | 880 | *raw_super_buf = sb_bread(sb, block); |
881 | if (!*raw_super_buf) { | |
9076a75f GZ |
882 | f2fs_msg(sb, KERN_ERR, "Unable to read %dth superblock", |
883 | block + 1); | |
884 | if (block == 0) { | |
885 | block++; | |
886 | goto retry; | |
887 | } else { | |
888 | return -EIO; | |
889 | } | |
14d7e9de | 890 | } |
891 | ||
892 | *raw_super = (struct f2fs_super_block *) | |
893 | ((char *)(*raw_super_buf)->b_data + F2FS_SUPER_OFFSET); | |
894 | ||
895 | /* sanity checking of raw super */ | |
9076a75f GZ |
896 | if (sanity_check_raw_super(sb, *raw_super)) { |
897 | brelse(*raw_super_buf); | |
6c311ec6 CF |
898 | f2fs_msg(sb, KERN_ERR, |
899 | "Can't find valid F2FS filesystem in %dth superblock", | |
900 | block + 1); | |
6bacf52f | 901 | if (block == 0) { |
9076a75f GZ |
902 | block++; |
903 | goto retry; | |
904 | } else { | |
905 | return -EINVAL; | |
906 | } | |
907 | } | |
14d7e9de | 908 | |
9076a75f | 909 | return 0; |
14d7e9de | 910 | } |
911 | ||
aff063e2 JK |
912 | static int f2fs_fill_super(struct super_block *sb, void *data, int silent) |
913 | { | |
914 | struct f2fs_sb_info *sbi; | |
915 | struct f2fs_super_block *raw_super; | |
916 | struct buffer_head *raw_super_buf; | |
917 | struct inode *root; | |
918 | long err = -EINVAL; | |
971767ca | 919 | int i; |
aff063e2 JK |
920 | |
921 | /* allocate memory for f2fs-specific super block info */ | |
922 | sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL); | |
923 | if (!sbi) | |
924 | return -ENOMEM; | |
925 | ||
ff9234ad | 926 | /* set a block size */ |
6bacf52f | 927 | if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) { |
a07ef784 | 928 | f2fs_msg(sb, KERN_ERR, "unable to set blocksize"); |
aff063e2 | 929 | goto free_sbi; |
a07ef784 | 930 | } |
aff063e2 | 931 | |
9076a75f GZ |
932 | err = read_raw_super_block(sb, &raw_super, &raw_super_buf); |
933 | if (err) | |
934 | goto free_sbi; | |
935 | ||
5fb08372 | 936 | sb->s_fs_info = sbi; |
aff063e2 JK |
937 | /* init some FS parameters */ |
938 | sbi->active_logs = NR_CURSEG_TYPE; | |
939 | ||
940 | set_opt(sbi, BG_GC); | |
941 | ||
942 | #ifdef CONFIG_F2FS_FS_XATTR | |
943 | set_opt(sbi, XATTR_USER); | |
944 | #endif | |
945 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
946 | set_opt(sbi, POSIX_ACL); | |
947 | #endif | |
948 | /* parse mount options */ | |
5fb08372 | 949 | err = parse_options(sb, (char *)data); |
66348b72 | 950 | if (err) |
aff063e2 JK |
951 | goto free_sb_buf; |
952 | ||
25ca923b | 953 | sb->s_maxbytes = max_file_size(le32_to_cpu(raw_super->log_blocksize)); |
aff063e2 JK |
954 | sb->s_max_links = F2FS_LINK_MAX; |
955 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
956 | ||
957 | sb->s_op = &f2fs_sops; | |
958 | sb->s_xattr = f2fs_xattr_handlers; | |
959 | sb->s_export_op = &f2fs_export_ops; | |
960 | sb->s_magic = F2FS_SUPER_MAGIC; | |
aff063e2 JK |
961 | sb->s_time_gran = 1; |
962 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
963 | (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0); | |
964 | memcpy(sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid)); | |
965 | ||
966 | /* init f2fs-specific super block info */ | |
967 | sbi->sb = sb; | |
968 | sbi->raw_super = raw_super; | |
969 | sbi->raw_super_buf = raw_super_buf; | |
970 | mutex_init(&sbi->gc_mutex); | |
aff063e2 JK |
971 | mutex_init(&sbi->writepages); |
972 | mutex_init(&sbi->cp_mutex); | |
39936837 | 973 | mutex_init(&sbi->node_write); |
aabe5136 | 974 | sbi->por_doing = false; |
aff063e2 | 975 | spin_lock_init(&sbi->stat_lock); |
971767ca | 976 | |
df0f8dc0 | 977 | init_rwsem(&sbi->read_io.io_rwsem); |
458e6197 JK |
978 | sbi->read_io.sbi = sbi; |
979 | sbi->read_io.bio = NULL; | |
980 | for (i = 0; i < NR_PAGE_TYPE; i++) { | |
df0f8dc0 | 981 | init_rwsem(&sbi->write_io[i].io_rwsem); |
458e6197 JK |
982 | sbi->write_io[i].sbi = sbi; |
983 | sbi->write_io[i].bio = NULL; | |
984 | } | |
971767ca | 985 | |
e479556b | 986 | init_rwsem(&sbi->cp_rwsem); |
fb51b5ef | 987 | init_waitqueue_head(&sbi->cp_wait); |
aff063e2 JK |
988 | init_sb_info(sbi); |
989 | ||
990 | /* get an inode for meta space */ | |
991 | sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi)); | |
992 | if (IS_ERR(sbi->meta_inode)) { | |
a07ef784 | 993 | f2fs_msg(sb, KERN_ERR, "Failed to read F2FS meta data inode"); |
aff063e2 JK |
994 | err = PTR_ERR(sbi->meta_inode); |
995 | goto free_sb_buf; | |
996 | } | |
997 | ||
998 | err = get_valid_checkpoint(sbi); | |
a07ef784 NJ |
999 | if (err) { |
1000 | f2fs_msg(sb, KERN_ERR, "Failed to get valid F2FS checkpoint"); | |
aff063e2 | 1001 | goto free_meta_inode; |
a07ef784 | 1002 | } |
aff063e2 JK |
1003 | |
1004 | /* sanity checking of checkpoint */ | |
1005 | err = -EINVAL; | |
577e3495 | 1006 | if (sanity_check_ckpt(sbi)) { |
a07ef784 | 1007 | f2fs_msg(sb, KERN_ERR, "Invalid F2FS checkpoint"); |
aff063e2 | 1008 | goto free_cp; |
a07ef784 | 1009 | } |
aff063e2 JK |
1010 | |
1011 | sbi->total_valid_node_count = | |
1012 | le32_to_cpu(sbi->ckpt->valid_node_count); | |
1013 | sbi->total_valid_inode_count = | |
1014 | le32_to_cpu(sbi->ckpt->valid_inode_count); | |
1015 | sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count); | |
1016 | sbi->total_valid_block_count = | |
1017 | le64_to_cpu(sbi->ckpt->valid_block_count); | |
1018 | sbi->last_valid_block_count = sbi->total_valid_block_count; | |
1019 | sbi->alloc_valid_block_count = 0; | |
1020 | INIT_LIST_HEAD(&sbi->dir_inode_list); | |
1021 | spin_lock_init(&sbi->dir_inode_lock); | |
1022 | ||
aff063e2 JK |
1023 | init_orphan_info(sbi); |
1024 | ||
1025 | /* setup f2fs internal modules */ | |
1026 | err = build_segment_manager(sbi); | |
a07ef784 NJ |
1027 | if (err) { |
1028 | f2fs_msg(sb, KERN_ERR, | |
1029 | "Failed to initialize F2FS segment manager"); | |
aff063e2 | 1030 | goto free_sm; |
a07ef784 | 1031 | } |
aff063e2 | 1032 | err = build_node_manager(sbi); |
a07ef784 NJ |
1033 | if (err) { |
1034 | f2fs_msg(sb, KERN_ERR, | |
1035 | "Failed to initialize F2FS node manager"); | |
aff063e2 | 1036 | goto free_nm; |
a07ef784 | 1037 | } |
aff063e2 JK |
1038 | |
1039 | build_gc_manager(sbi); | |
1040 | ||
1041 | /* get an inode for node space */ | |
1042 | sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi)); | |
1043 | if (IS_ERR(sbi->node_inode)) { | |
a07ef784 | 1044 | f2fs_msg(sb, KERN_ERR, "Failed to read node inode"); |
aff063e2 JK |
1045 | err = PTR_ERR(sbi->node_inode); |
1046 | goto free_nm; | |
1047 | } | |
1048 | ||
1049 | /* if there are nt orphan nodes free them */ | |
8f99a946 | 1050 | recover_orphan_inodes(sbi); |
aff063e2 JK |
1051 | |
1052 | /* read root inode and dentry */ | |
1053 | root = f2fs_iget(sb, F2FS_ROOT_INO(sbi)); | |
1054 | if (IS_ERR(root)) { | |
a07ef784 | 1055 | f2fs_msg(sb, KERN_ERR, "Failed to read root inode"); |
aff063e2 JK |
1056 | err = PTR_ERR(root); |
1057 | goto free_node_inode; | |
1058 | } | |
8f99a946 CY |
1059 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { |
1060 | err = -EINVAL; | |
aff063e2 | 1061 | goto free_root_inode; |
8f99a946 | 1062 | } |
aff063e2 JK |
1063 | |
1064 | sb->s_root = d_make_root(root); /* allocate root dentry */ | |
1065 | if (!sb->s_root) { | |
1066 | err = -ENOMEM; | |
1067 | goto free_root_inode; | |
1068 | } | |
1069 | ||
aff063e2 JK |
1070 | err = f2fs_build_stats(sbi); |
1071 | if (err) | |
6437d1b0 | 1072 | goto free_root_inode; |
aff063e2 | 1073 | |
5e176d54 JK |
1074 | if (f2fs_proc_root) |
1075 | sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root); | |
1076 | ||
1077 | if (sbi->s_proc) | |
1078 | proc_create_data("segment_info", S_IRUGO, sbi->s_proc, | |
1079 | &f2fs_seq_segment_info_fops, sb); | |
1080 | ||
d3ee456d NJ |
1081 | if (test_opt(sbi, DISCARD)) { |
1082 | struct request_queue *q = bdev_get_queue(sb->s_bdev); | |
1083 | if (!blk_queue_discard(q)) | |
1084 | f2fs_msg(sb, KERN_WARNING, | |
1085 | "mounting with \"discard\" option, but " | |
1086 | "the device does not support discard"); | |
1087 | } | |
1088 | ||
b59d0bae NJ |
1089 | sbi->s_kobj.kset = f2fs_kset; |
1090 | init_completion(&sbi->s_kobj_unregister); | |
1091 | err = kobject_init_and_add(&sbi->s_kobj, &f2fs_ktype, NULL, | |
1092 | "%s", sb->s_id); | |
1093 | if (err) | |
6437d1b0 | 1094 | goto free_proc; |
b59d0bae | 1095 | |
6437d1b0 JK |
1096 | /* recover fsynced data */ |
1097 | if (!test_opt(sbi, DISABLE_ROLL_FORWARD)) { | |
1098 | err = recover_fsync_data(sbi); | |
1099 | if (err) | |
1100 | f2fs_msg(sb, KERN_ERR, | |
1101 | "Cannot recover all fsync data errno=%ld", err); | |
1102 | } | |
b59d0bae | 1103 | |
6437d1b0 JK |
1104 | /* |
1105 | * If filesystem is not mounted as read-only then | |
1106 | * do start the gc_thread. | |
1107 | */ | |
1108 | if (!(sb->s_flags & MS_RDONLY)) { | |
1109 | /* After POR, we can run background GC thread.*/ | |
1110 | err = start_gc_thread(sbi); | |
1111 | if (err) | |
1112 | goto free_kobj; | |
1113 | } | |
aff063e2 | 1114 | return 0; |
6437d1b0 JK |
1115 | |
1116 | free_kobj: | |
1117 | kobject_del(&sbi->s_kobj); | |
1118 | free_proc: | |
1d15bd20 CY |
1119 | if (sbi->s_proc) { |
1120 | remove_proc_entry("segment_info", sbi->s_proc); | |
1121 | remove_proc_entry(sb->s_id, f2fs_proc_root); | |
1122 | } | |
1123 | f2fs_destroy_stats(sbi); | |
aff063e2 JK |
1124 | free_root_inode: |
1125 | dput(sb->s_root); | |
1126 | sb->s_root = NULL; | |
1127 | free_node_inode: | |
1128 | iput(sbi->node_inode); | |
1129 | free_nm: | |
1130 | destroy_node_manager(sbi); | |
1131 | free_sm: | |
1132 | destroy_segment_manager(sbi); | |
1133 | free_cp: | |
1134 | kfree(sbi->ckpt); | |
1135 | free_meta_inode: | |
1136 | make_bad_inode(sbi->meta_inode); | |
1137 | iput(sbi->meta_inode); | |
1138 | free_sb_buf: | |
1139 | brelse(raw_super_buf); | |
1140 | free_sbi: | |
1141 | kfree(sbi); | |
1142 | return err; | |
1143 | } | |
1144 | ||
1145 | static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags, | |
1146 | const char *dev_name, void *data) | |
1147 | { | |
1148 | return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super); | |
1149 | } | |
1150 | ||
1151 | static struct file_system_type f2fs_fs_type = { | |
1152 | .owner = THIS_MODULE, | |
1153 | .name = "f2fs", | |
1154 | .mount = f2fs_mount, | |
1155 | .kill_sb = kill_block_super, | |
1156 | .fs_flags = FS_REQUIRES_DEV, | |
1157 | }; | |
7f78e035 | 1158 | MODULE_ALIAS_FS("f2fs"); |
aff063e2 | 1159 | |
6e6093a8 | 1160 | static int __init init_inodecache(void) |
aff063e2 JK |
1161 | { |
1162 | f2fs_inode_cachep = f2fs_kmem_cache_create("f2fs_inode_cache", | |
e8512d2e | 1163 | sizeof(struct f2fs_inode_info)); |
6bacf52f | 1164 | if (!f2fs_inode_cachep) |
aff063e2 JK |
1165 | return -ENOMEM; |
1166 | return 0; | |
1167 | } | |
1168 | ||
1169 | static void destroy_inodecache(void) | |
1170 | { | |
1171 | /* | |
1172 | * Make sure all delayed rcu free inodes are flushed before we | |
1173 | * destroy cache. | |
1174 | */ | |
1175 | rcu_barrier(); | |
1176 | kmem_cache_destroy(f2fs_inode_cachep); | |
1177 | } | |
1178 | ||
1179 | static int __init init_f2fs_fs(void) | |
1180 | { | |
1181 | int err; | |
1182 | ||
1183 | err = init_inodecache(); | |
1184 | if (err) | |
1185 | goto fail; | |
1186 | err = create_node_manager_caches(); | |
1187 | if (err) | |
9890ff3f | 1188 | goto free_inodecache; |
7fd9e544 | 1189 | err = create_segment_manager_caches(); |
aff063e2 | 1190 | if (err) |
9890ff3f | 1191 | goto free_node_manager_caches; |
7fd9e544 JK |
1192 | err = create_gc_caches(); |
1193 | if (err) | |
1194 | goto free_segment_manager_caches; | |
aff063e2 JK |
1195 | err = create_checkpoint_caches(); |
1196 | if (err) | |
9890ff3f | 1197 | goto free_gc_caches; |
b59d0bae | 1198 | f2fs_kset = kset_create_and_add("f2fs", NULL, fs_kobj); |
6e6b978c WY |
1199 | if (!f2fs_kset) { |
1200 | err = -ENOMEM; | |
9890ff3f | 1201 | goto free_checkpoint_caches; |
6e6b978c | 1202 | } |
4589d25d NJ |
1203 | err = register_filesystem(&f2fs_fs_type); |
1204 | if (err) | |
9890ff3f | 1205 | goto free_kset; |
4589d25d | 1206 | f2fs_create_root_stats(); |
5e176d54 | 1207 | f2fs_proc_root = proc_mkdir("fs/f2fs", NULL); |
9890ff3f ZH |
1208 | return 0; |
1209 | ||
1210 | free_kset: | |
1211 | kset_unregister(f2fs_kset); | |
1212 | free_checkpoint_caches: | |
1213 | destroy_checkpoint_caches(); | |
1214 | free_gc_caches: | |
1215 | destroy_gc_caches(); | |
7fd9e544 JK |
1216 | free_segment_manager_caches: |
1217 | destroy_segment_manager_caches(); | |
9890ff3f ZH |
1218 | free_node_manager_caches: |
1219 | destroy_node_manager_caches(); | |
1220 | free_inodecache: | |
1221 | destroy_inodecache(); | |
aff063e2 JK |
1222 | fail: |
1223 | return err; | |
1224 | } | |
1225 | ||
1226 | static void __exit exit_f2fs_fs(void) | |
1227 | { | |
5e176d54 | 1228 | remove_proc_entry("fs/f2fs", NULL); |
4589d25d | 1229 | f2fs_destroy_root_stats(); |
aff063e2 JK |
1230 | unregister_filesystem(&f2fs_fs_type); |
1231 | destroy_checkpoint_caches(); | |
1232 | destroy_gc_caches(); | |
5dcd8a71 | 1233 | destroy_segment_manager_caches(); |
aff063e2 JK |
1234 | destroy_node_manager_caches(); |
1235 | destroy_inodecache(); | |
b59d0bae | 1236 | kset_unregister(f2fs_kset); |
aff063e2 JK |
1237 | } |
1238 | ||
1239 | module_init(init_f2fs_fs) | |
1240 | module_exit(exit_f2fs_fs) | |
1241 | ||
1242 | MODULE_AUTHOR("Samsung Electronics's Praesto Team"); | |
1243 | MODULE_DESCRIPTION("Flash Friendly File System"); | |
1244 | MODULE_LICENSE("GPL"); |