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Commit | Line | Data |
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0a8165d7 | 1 | /* |
aff063e2 JK |
2 | * fs/f2fs/super.c |
3 | * | |
4 | * Copyright (c) 2012 Samsung Electronics Co., Ltd. | |
5 | * http://www.samsung.com/ | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | #include <linux/module.h> | |
12 | #include <linux/init.h> | |
13 | #include <linux/fs.h> | |
14 | #include <linux/statfs.h> | |
aff063e2 JK |
15 | #include <linux/buffer_head.h> |
16 | #include <linux/backing-dev.h> | |
17 | #include <linux/kthread.h> | |
18 | #include <linux/parser.h> | |
19 | #include <linux/mount.h> | |
20 | #include <linux/seq_file.h> | |
5e176d54 | 21 | #include <linux/proc_fs.h> |
aff063e2 JK |
22 | #include <linux/random.h> |
23 | #include <linux/exportfs.h> | |
d3ee456d | 24 | #include <linux/blkdev.h> |
aff063e2 | 25 | #include <linux/f2fs_fs.h> |
b59d0bae | 26 | #include <linux/sysfs.h> |
aff063e2 JK |
27 | |
28 | #include "f2fs.h" | |
29 | #include "node.h" | |
5ec4e49f | 30 | #include "segment.h" |
aff063e2 | 31 | #include "xattr.h" |
b59d0bae | 32 | #include "gc.h" |
aff063e2 | 33 | |
a2a4a7e4 NJ |
34 | #define CREATE_TRACE_POINTS |
35 | #include <trace/events/f2fs.h> | |
36 | ||
5e176d54 | 37 | static struct proc_dir_entry *f2fs_proc_root; |
aff063e2 | 38 | static struct kmem_cache *f2fs_inode_cachep; |
b59d0bae | 39 | static struct kset *f2fs_kset; |
aff063e2 JK |
40 | |
41 | enum { | |
696c018c | 42 | Opt_gc_background, |
aff063e2 JK |
43 | Opt_disable_roll_forward, |
44 | Opt_discard, | |
45 | Opt_noheap, | |
4058c511 | 46 | Opt_user_xattr, |
aff063e2 | 47 | Opt_nouser_xattr, |
4058c511 | 48 | Opt_acl, |
aff063e2 JK |
49 | Opt_noacl, |
50 | Opt_active_logs, | |
51 | Opt_disable_ext_identify, | |
444c580f | 52 | Opt_inline_xattr, |
8274de77 | 53 | Opt_inline_data, |
6b4afdd7 | 54 | Opt_flush_merge, |
0f7b2abd | 55 | Opt_nobarrier, |
aff063e2 JK |
56 | Opt_err, |
57 | }; | |
58 | ||
59 | static match_table_t f2fs_tokens = { | |
696c018c | 60 | {Opt_gc_background, "background_gc=%s"}, |
aff063e2 JK |
61 | {Opt_disable_roll_forward, "disable_roll_forward"}, |
62 | {Opt_discard, "discard"}, | |
63 | {Opt_noheap, "no_heap"}, | |
4058c511 | 64 | {Opt_user_xattr, "user_xattr"}, |
aff063e2 | 65 | {Opt_nouser_xattr, "nouser_xattr"}, |
4058c511 | 66 | {Opt_acl, "acl"}, |
aff063e2 JK |
67 | {Opt_noacl, "noacl"}, |
68 | {Opt_active_logs, "active_logs=%u"}, | |
69 | {Opt_disable_ext_identify, "disable_ext_identify"}, | |
444c580f | 70 | {Opt_inline_xattr, "inline_xattr"}, |
8274de77 | 71 | {Opt_inline_data, "inline_data"}, |
6b4afdd7 | 72 | {Opt_flush_merge, "flush_merge"}, |
0f7b2abd | 73 | {Opt_nobarrier, "nobarrier"}, |
aff063e2 JK |
74 | {Opt_err, NULL}, |
75 | }; | |
76 | ||
b59d0bae | 77 | /* Sysfs support for f2fs */ |
ea91e9b0 JK |
78 | enum { |
79 | GC_THREAD, /* struct f2fs_gc_thread */ | |
80 | SM_INFO, /* struct f2fs_sm_info */ | |
cdfc41c1 | 81 | NM_INFO, /* struct f2fs_nm_info */ |
b1c57c1c | 82 | F2FS_SBI, /* struct f2fs_sb_info */ |
ea91e9b0 JK |
83 | }; |
84 | ||
b59d0bae NJ |
85 | struct f2fs_attr { |
86 | struct attribute attr; | |
87 | ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *); | |
88 | ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *, | |
89 | const char *, size_t); | |
ea91e9b0 | 90 | int struct_type; |
b59d0bae NJ |
91 | int offset; |
92 | }; | |
93 | ||
ea91e9b0 JK |
94 | static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type) |
95 | { | |
96 | if (struct_type == GC_THREAD) | |
97 | return (unsigned char *)sbi->gc_thread; | |
98 | else if (struct_type == SM_INFO) | |
99 | return (unsigned char *)SM_I(sbi); | |
cdfc41c1 JK |
100 | else if (struct_type == NM_INFO) |
101 | return (unsigned char *)NM_I(sbi); | |
b1c57c1c JK |
102 | else if (struct_type == F2FS_SBI) |
103 | return (unsigned char *)sbi; | |
ea91e9b0 JK |
104 | return NULL; |
105 | } | |
106 | ||
b59d0bae NJ |
107 | static ssize_t f2fs_sbi_show(struct f2fs_attr *a, |
108 | struct f2fs_sb_info *sbi, char *buf) | |
109 | { | |
ea91e9b0 | 110 | unsigned char *ptr = NULL; |
b59d0bae NJ |
111 | unsigned int *ui; |
112 | ||
ea91e9b0 JK |
113 | ptr = __struct_ptr(sbi, a->struct_type); |
114 | if (!ptr) | |
b59d0bae NJ |
115 | return -EINVAL; |
116 | ||
ea91e9b0 | 117 | ui = (unsigned int *)(ptr + a->offset); |
b59d0bae NJ |
118 | |
119 | return snprintf(buf, PAGE_SIZE, "%u\n", *ui); | |
120 | } | |
121 | ||
122 | static ssize_t f2fs_sbi_store(struct f2fs_attr *a, | |
123 | struct f2fs_sb_info *sbi, | |
124 | const char *buf, size_t count) | |
125 | { | |
ea91e9b0 | 126 | unsigned char *ptr; |
b59d0bae NJ |
127 | unsigned long t; |
128 | unsigned int *ui; | |
129 | ssize_t ret; | |
130 | ||
ea91e9b0 JK |
131 | ptr = __struct_ptr(sbi, a->struct_type); |
132 | if (!ptr) | |
b59d0bae NJ |
133 | return -EINVAL; |
134 | ||
ea91e9b0 | 135 | ui = (unsigned int *)(ptr + a->offset); |
b59d0bae NJ |
136 | |
137 | ret = kstrtoul(skip_spaces(buf), 0, &t); | |
138 | if (ret < 0) | |
139 | return ret; | |
140 | *ui = t; | |
141 | return count; | |
142 | } | |
143 | ||
144 | static ssize_t f2fs_attr_show(struct kobject *kobj, | |
145 | struct attribute *attr, char *buf) | |
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->show ? a->show(a, sbi, buf) : 0; | |
152 | } | |
153 | ||
154 | static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr, | |
155 | const char *buf, size_t len) | |
156 | { | |
157 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, | |
158 | s_kobj); | |
159 | struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); | |
160 | ||
161 | return a->store ? a->store(a, sbi, buf, len) : 0; | |
162 | } | |
163 | ||
164 | static void f2fs_sb_release(struct kobject *kobj) | |
165 | { | |
166 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, | |
167 | s_kobj); | |
168 | complete(&sbi->s_kobj_unregister); | |
169 | } | |
170 | ||
ea91e9b0 | 171 | #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \ |
b59d0bae NJ |
172 | static struct f2fs_attr f2fs_attr_##_name = { \ |
173 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
174 | .show = _show, \ | |
175 | .store = _store, \ | |
ea91e9b0 JK |
176 | .struct_type = _struct_type, \ |
177 | .offset = _offset \ | |
b59d0bae NJ |
178 | } |
179 | ||
ea91e9b0 JK |
180 | #define F2FS_RW_ATTR(struct_type, struct_name, name, elname) \ |
181 | F2FS_ATTR_OFFSET(struct_type, name, 0644, \ | |
182 | f2fs_sbi_show, f2fs_sbi_store, \ | |
183 | offsetof(struct struct_name, elname)) | |
b59d0bae | 184 | |
ea91e9b0 JK |
185 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time); |
186 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time); | |
187 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time); | |
188 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_idle, gc_idle); | |
189 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments); | |
7ac8c3b0 | 190 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, max_small_discards, max_discards); |
216fbd64 JK |
191 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy); |
192 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util); | |
cdfc41c1 | 193 | F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh); |
b1c57c1c | 194 | F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search); |
ab9fa662 | 195 | F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level); |
b59d0bae NJ |
196 | |
197 | #define ATTR_LIST(name) (&f2fs_attr_##name.attr) | |
198 | static struct attribute *f2fs_attrs[] = { | |
199 | ATTR_LIST(gc_min_sleep_time), | |
200 | ATTR_LIST(gc_max_sleep_time), | |
201 | ATTR_LIST(gc_no_gc_sleep_time), | |
d2dc095f | 202 | ATTR_LIST(gc_idle), |
ea91e9b0 | 203 | ATTR_LIST(reclaim_segments), |
7ac8c3b0 | 204 | ATTR_LIST(max_small_discards), |
216fbd64 JK |
205 | ATTR_LIST(ipu_policy), |
206 | ATTR_LIST(min_ipu_util), | |
b1c57c1c | 207 | ATTR_LIST(max_victim_search), |
ab9fa662 | 208 | ATTR_LIST(dir_level), |
cdfc41c1 | 209 | ATTR_LIST(ram_thresh), |
b59d0bae NJ |
210 | NULL, |
211 | }; | |
212 | ||
213 | static const struct sysfs_ops f2fs_attr_ops = { | |
214 | .show = f2fs_attr_show, | |
215 | .store = f2fs_attr_store, | |
216 | }; | |
217 | ||
218 | static struct kobj_type f2fs_ktype = { | |
219 | .default_attrs = f2fs_attrs, | |
220 | .sysfs_ops = &f2fs_attr_ops, | |
221 | .release = f2fs_sb_release, | |
222 | }; | |
223 | ||
a07ef784 NJ |
224 | void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...) |
225 | { | |
226 | struct va_format vaf; | |
227 | va_list args; | |
228 | ||
229 | va_start(args, fmt); | |
230 | vaf.fmt = fmt; | |
231 | vaf.va = &args; | |
232 | printk("%sF2FS-fs (%s): %pV\n", level, sb->s_id, &vaf); | |
233 | va_end(args); | |
234 | } | |
235 | ||
aff063e2 JK |
236 | static void init_once(void *foo) |
237 | { | |
238 | struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo; | |
239 | ||
aff063e2 JK |
240 | inode_init_once(&fi->vfs_inode); |
241 | } | |
242 | ||
696c018c NJ |
243 | static int parse_options(struct super_block *sb, char *options) |
244 | { | |
245 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
246 | substring_t args[MAX_OPT_ARGS]; | |
247 | char *p, *name; | |
248 | int arg = 0; | |
249 | ||
250 | if (!options) | |
251 | return 0; | |
252 | ||
253 | while ((p = strsep(&options, ",")) != NULL) { | |
254 | int token; | |
255 | if (!*p) | |
256 | continue; | |
257 | /* | |
258 | * Initialize args struct so we know whether arg was | |
259 | * found; some options take optional arguments. | |
260 | */ | |
261 | args[0].to = args[0].from = NULL; | |
262 | token = match_token(p, f2fs_tokens, args); | |
263 | ||
264 | switch (token) { | |
265 | case Opt_gc_background: | |
266 | name = match_strdup(&args[0]); | |
267 | ||
268 | if (!name) | |
269 | return -ENOMEM; | |
04c09388 | 270 | if (strlen(name) == 2 && !strncmp(name, "on", 2)) |
696c018c | 271 | set_opt(sbi, BG_GC); |
04c09388 | 272 | else if (strlen(name) == 3 && !strncmp(name, "off", 3)) |
696c018c NJ |
273 | clear_opt(sbi, BG_GC); |
274 | else { | |
275 | kfree(name); | |
276 | return -EINVAL; | |
277 | } | |
278 | kfree(name); | |
279 | break; | |
280 | case Opt_disable_roll_forward: | |
281 | set_opt(sbi, DISABLE_ROLL_FORWARD); | |
282 | break; | |
283 | case Opt_discard: | |
284 | set_opt(sbi, DISCARD); | |
285 | break; | |
286 | case Opt_noheap: | |
287 | set_opt(sbi, NOHEAP); | |
288 | break; | |
289 | #ifdef CONFIG_F2FS_FS_XATTR | |
4058c511 KA |
290 | case Opt_user_xattr: |
291 | set_opt(sbi, XATTR_USER); | |
292 | break; | |
696c018c NJ |
293 | case Opt_nouser_xattr: |
294 | clear_opt(sbi, XATTR_USER); | |
295 | break; | |
444c580f JK |
296 | case Opt_inline_xattr: |
297 | set_opt(sbi, INLINE_XATTR); | |
298 | break; | |
696c018c | 299 | #else |
4058c511 KA |
300 | case Opt_user_xattr: |
301 | f2fs_msg(sb, KERN_INFO, | |
302 | "user_xattr options not supported"); | |
303 | break; | |
696c018c NJ |
304 | case Opt_nouser_xattr: |
305 | f2fs_msg(sb, KERN_INFO, | |
306 | "nouser_xattr options not supported"); | |
307 | break; | |
444c580f JK |
308 | case Opt_inline_xattr: |
309 | f2fs_msg(sb, KERN_INFO, | |
310 | "inline_xattr options not supported"); | |
311 | break; | |
696c018c NJ |
312 | #endif |
313 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
4058c511 KA |
314 | case Opt_acl: |
315 | set_opt(sbi, POSIX_ACL); | |
316 | break; | |
696c018c NJ |
317 | case Opt_noacl: |
318 | clear_opt(sbi, POSIX_ACL); | |
319 | break; | |
320 | #else | |
4058c511 KA |
321 | case Opt_acl: |
322 | f2fs_msg(sb, KERN_INFO, "acl options not supported"); | |
323 | break; | |
696c018c NJ |
324 | case Opt_noacl: |
325 | f2fs_msg(sb, KERN_INFO, "noacl options not supported"); | |
326 | break; | |
327 | #endif | |
328 | case Opt_active_logs: | |
329 | if (args->from && match_int(args, &arg)) | |
330 | return -EINVAL; | |
331 | if (arg != 2 && arg != 4 && arg != NR_CURSEG_TYPE) | |
332 | return -EINVAL; | |
333 | sbi->active_logs = arg; | |
334 | break; | |
335 | case Opt_disable_ext_identify: | |
336 | set_opt(sbi, DISABLE_EXT_IDENTIFY); | |
337 | break; | |
8274de77 HL |
338 | case Opt_inline_data: |
339 | set_opt(sbi, INLINE_DATA); | |
340 | break; | |
6b4afdd7 JK |
341 | case Opt_flush_merge: |
342 | set_opt(sbi, FLUSH_MERGE); | |
343 | break; | |
0f7b2abd JK |
344 | case Opt_nobarrier: |
345 | set_opt(sbi, NOBARRIER); | |
346 | break; | |
696c018c NJ |
347 | default: |
348 | f2fs_msg(sb, KERN_ERR, | |
349 | "Unrecognized mount option \"%s\" or missing value", | |
350 | p); | |
351 | return -EINVAL; | |
352 | } | |
353 | } | |
354 | return 0; | |
355 | } | |
356 | ||
aff063e2 JK |
357 | static struct inode *f2fs_alloc_inode(struct super_block *sb) |
358 | { | |
359 | struct f2fs_inode_info *fi; | |
360 | ||
a0acdfe0 | 361 | fi = kmem_cache_alloc(f2fs_inode_cachep, GFP_F2FS_ZERO); |
aff063e2 JK |
362 | if (!fi) |
363 | return NULL; | |
364 | ||
365 | init_once((void *) fi); | |
366 | ||
434720fa | 367 | /* Initialize f2fs-specific inode info */ |
aff063e2 JK |
368 | fi->vfs_inode.i_version = 1; |
369 | atomic_set(&fi->dirty_dents, 0); | |
370 | fi->i_current_depth = 1; | |
371 | fi->i_advise = 0; | |
372 | rwlock_init(&fi->ext.ext_lock); | |
d928bfbf | 373 | init_rwsem(&fi->i_sem); |
aff063e2 JK |
374 | |
375 | set_inode_flag(fi, FI_NEW_INODE); | |
376 | ||
444c580f JK |
377 | if (test_opt(F2FS_SB(sb), INLINE_XATTR)) |
378 | set_inode_flag(fi, FI_INLINE_XATTR); | |
379 | ||
ab9fa662 JK |
380 | /* Will be used by directory only */ |
381 | fi->i_dir_level = F2FS_SB(sb)->dir_level; | |
382 | ||
aff063e2 JK |
383 | return &fi->vfs_inode; |
384 | } | |
385 | ||
531ad7d5 JK |
386 | static int f2fs_drop_inode(struct inode *inode) |
387 | { | |
388 | /* | |
389 | * This is to avoid a deadlock condition like below. | |
390 | * writeback_single_inode(inode) | |
391 | * - f2fs_write_data_page | |
392 | * - f2fs_gc -> iput -> evict | |
393 | * - inode_wait_for_writeback(inode) | |
394 | */ | |
395 | if (!inode_unhashed(inode) && inode->i_state & I_SYNC) | |
396 | return 0; | |
397 | return generic_drop_inode(inode); | |
398 | } | |
399 | ||
b3783873 JK |
400 | /* |
401 | * f2fs_dirty_inode() is called from __mark_inode_dirty() | |
402 | * | |
403 | * We should call set_dirty_inode to write the dirty inode through write_inode. | |
404 | */ | |
405 | static void f2fs_dirty_inode(struct inode *inode, int flags) | |
406 | { | |
407 | set_inode_flag(F2FS_I(inode), FI_DIRTY_INODE); | |
b3783873 JK |
408 | } |
409 | ||
aff063e2 JK |
410 | static void f2fs_i_callback(struct rcu_head *head) |
411 | { | |
412 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
413 | kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode)); | |
414 | } | |
415 | ||
25ca923b | 416 | static void f2fs_destroy_inode(struct inode *inode) |
aff063e2 JK |
417 | { |
418 | call_rcu(&inode->i_rcu, f2fs_i_callback); | |
419 | } | |
420 | ||
421 | static void f2fs_put_super(struct super_block *sb) | |
422 | { | |
423 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
424 | ||
5e176d54 JK |
425 | if (sbi->s_proc) { |
426 | remove_proc_entry("segment_info", sbi->s_proc); | |
427 | remove_proc_entry(sb->s_id, f2fs_proc_root); | |
428 | } | |
b59d0bae | 429 | kobject_del(&sbi->s_kobj); |
5e176d54 | 430 | |
aff063e2 JK |
431 | f2fs_destroy_stats(sbi); |
432 | stop_gc_thread(sbi); | |
433 | ||
5887d291 JK |
434 | /* We don't need to do checkpoint when it's clean */ |
435 | if (sbi->s_dirty && get_pages(sbi, F2FS_DIRTY_NODES)) | |
436 | write_checkpoint(sbi, true); | |
aff063e2 JK |
437 | |
438 | iput(sbi->node_inode); | |
439 | iput(sbi->meta_inode); | |
440 | ||
441 | /* destroy f2fs internal modules */ | |
442 | destroy_node_manager(sbi); | |
443 | destroy_segment_manager(sbi); | |
444 | ||
445 | kfree(sbi->ckpt); | |
b59d0bae NJ |
446 | kobject_put(&sbi->s_kobj); |
447 | wait_for_completion(&sbi->s_kobj_unregister); | |
aff063e2 JK |
448 | |
449 | sb->s_fs_info = NULL; | |
450 | brelse(sbi->raw_super_buf); | |
451 | kfree(sbi); | |
452 | } | |
453 | ||
454 | int f2fs_sync_fs(struct super_block *sb, int sync) | |
455 | { | |
456 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
aff063e2 | 457 | |
a2a4a7e4 NJ |
458 | trace_f2fs_sync_fs(sb, sync); |
459 | ||
aff063e2 JK |
460 | if (!sbi->s_dirty && !get_pages(sbi, F2FS_DIRTY_NODES)) |
461 | return 0; | |
462 | ||
b7473754 JK |
463 | if (sync) { |
464 | mutex_lock(&sbi->gc_mutex); | |
43727527 | 465 | write_checkpoint(sbi, false); |
b7473754 JK |
466 | mutex_unlock(&sbi->gc_mutex); |
467 | } else { | |
7d82db83 | 468 | f2fs_balance_fs(sbi); |
b7473754 | 469 | } |
aff063e2 | 470 | |
64c576fe | 471 | return 0; |
aff063e2 JK |
472 | } |
473 | ||
d6212a5f CL |
474 | static int f2fs_freeze(struct super_block *sb) |
475 | { | |
476 | int err; | |
477 | ||
77888c1e | 478 | if (f2fs_readonly(sb)) |
d6212a5f CL |
479 | return 0; |
480 | ||
481 | err = f2fs_sync_fs(sb, 1); | |
482 | return err; | |
483 | } | |
484 | ||
485 | static int f2fs_unfreeze(struct super_block *sb) | |
486 | { | |
487 | return 0; | |
488 | } | |
489 | ||
aff063e2 JK |
490 | static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf) |
491 | { | |
492 | struct super_block *sb = dentry->d_sb; | |
493 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
494 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); | |
495 | block_t total_count, user_block_count, start_count, ovp_count; | |
496 | ||
497 | total_count = le64_to_cpu(sbi->raw_super->block_count); | |
498 | user_block_count = sbi->user_block_count; | |
499 | start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr); | |
500 | ovp_count = SM_I(sbi)->ovp_segments << sbi->log_blocks_per_seg; | |
501 | buf->f_type = F2FS_SUPER_MAGIC; | |
502 | buf->f_bsize = sbi->blocksize; | |
503 | ||
504 | buf->f_blocks = total_count - start_count; | |
505 | buf->f_bfree = buf->f_blocks - valid_user_blocks(sbi) - ovp_count; | |
506 | buf->f_bavail = user_block_count - valid_user_blocks(sbi); | |
507 | ||
1362b5e3 JK |
508 | buf->f_files = sbi->total_node_count; |
509 | buf->f_ffree = sbi->total_node_count - valid_inode_count(sbi); | |
aff063e2 | 510 | |
5a20d339 | 511 | buf->f_namelen = F2FS_NAME_LEN; |
aff063e2 JK |
512 | buf->f_fsid.val[0] = (u32)id; |
513 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
514 | ||
515 | return 0; | |
516 | } | |
517 | ||
518 | static int f2fs_show_options(struct seq_file *seq, struct dentry *root) | |
519 | { | |
520 | struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb); | |
521 | ||
b270ad6f | 522 | if (!f2fs_readonly(sbi->sb) && test_opt(sbi, BG_GC)) |
696c018c | 523 | seq_printf(seq, ",background_gc=%s", "on"); |
aff063e2 | 524 | else |
696c018c | 525 | seq_printf(seq, ",background_gc=%s", "off"); |
aff063e2 JK |
526 | if (test_opt(sbi, DISABLE_ROLL_FORWARD)) |
527 | seq_puts(seq, ",disable_roll_forward"); | |
528 | if (test_opt(sbi, DISCARD)) | |
529 | seq_puts(seq, ",discard"); | |
530 | if (test_opt(sbi, NOHEAP)) | |
531 | seq_puts(seq, ",no_heap_alloc"); | |
532 | #ifdef CONFIG_F2FS_FS_XATTR | |
533 | if (test_opt(sbi, XATTR_USER)) | |
534 | seq_puts(seq, ",user_xattr"); | |
535 | else | |
536 | seq_puts(seq, ",nouser_xattr"); | |
444c580f JK |
537 | if (test_opt(sbi, INLINE_XATTR)) |
538 | seq_puts(seq, ",inline_xattr"); | |
aff063e2 JK |
539 | #endif |
540 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
541 | if (test_opt(sbi, POSIX_ACL)) | |
542 | seq_puts(seq, ",acl"); | |
543 | else | |
544 | seq_puts(seq, ",noacl"); | |
545 | #endif | |
546 | if (test_opt(sbi, DISABLE_EXT_IDENTIFY)) | |
aa43507f | 547 | seq_puts(seq, ",disable_ext_identify"); |
8274de77 HL |
548 | if (test_opt(sbi, INLINE_DATA)) |
549 | seq_puts(seq, ",inline_data"); | |
b270ad6f | 550 | if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE)) |
6b4afdd7 | 551 | seq_puts(seq, ",flush_merge"); |
0f7b2abd JK |
552 | if (test_opt(sbi, NOBARRIER)) |
553 | seq_puts(seq, ",nobarrier"); | |
aff063e2 JK |
554 | seq_printf(seq, ",active_logs=%u", sbi->active_logs); |
555 | ||
556 | return 0; | |
557 | } | |
558 | ||
5e176d54 JK |
559 | static int segment_info_seq_show(struct seq_file *seq, void *offset) |
560 | { | |
561 | struct super_block *sb = seq->private; | |
562 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
6c311ec6 CF |
563 | unsigned int total_segs = |
564 | le32_to_cpu(sbi->raw_super->segment_count_main); | |
5e176d54 JK |
565 | int i; |
566 | ||
90aa6dc9 CY |
567 | seq_puts(seq, "format: segment_type|valid_blocks\n" |
568 | "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n"); | |
569 | ||
5e176d54 | 570 | for (i = 0; i < total_segs; i++) { |
90aa6dc9 CY |
571 | struct seg_entry *se = get_seg_entry(sbi, i); |
572 | ||
573 | if ((i % 10) == 0) | |
574 | seq_printf(seq, "%-5d", i); | |
575 | seq_printf(seq, "%d|%-3u", se->type, | |
576 | get_valid_blocks(sbi, i, 1)); | |
46c04366 GZ |
577 | if ((i % 10) == 9 || i == (total_segs - 1)) |
578 | seq_putc(seq, '\n'); | |
5e176d54 | 579 | else |
46c04366 | 580 | seq_putc(seq, ' '); |
5e176d54 | 581 | } |
46c04366 | 582 | |
5e176d54 JK |
583 | return 0; |
584 | } | |
585 | ||
586 | static int segment_info_open_fs(struct inode *inode, struct file *file) | |
587 | { | |
588 | return single_open(file, segment_info_seq_show, PDE_DATA(inode)); | |
589 | } | |
590 | ||
591 | static const struct file_operations f2fs_seq_segment_info_fops = { | |
592 | .owner = THIS_MODULE, | |
593 | .open = segment_info_open_fs, | |
594 | .read = seq_read, | |
595 | .llseek = seq_lseek, | |
596 | .release = single_release, | |
597 | }; | |
598 | ||
696c018c NJ |
599 | static int f2fs_remount(struct super_block *sb, int *flags, char *data) |
600 | { | |
601 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
602 | struct f2fs_mount_info org_mount_opt; | |
603 | int err, active_logs; | |
876dc59e GZ |
604 | bool need_restart_gc = false; |
605 | bool need_stop_gc = false; | |
696c018c | 606 | |
02b9984d TT |
607 | sync_filesystem(sb); |
608 | ||
696c018c NJ |
609 | /* |
610 | * Save the old mount options in case we | |
611 | * need to restore them. | |
612 | */ | |
613 | org_mount_opt = sbi->mount_opt; | |
614 | active_logs = sbi->active_logs; | |
615 | ||
616 | /* parse mount options */ | |
617 | err = parse_options(sb, data); | |
618 | if (err) | |
619 | goto restore_opts; | |
620 | ||
621 | /* | |
622 | * Previous and new state of filesystem is RO, | |
876dc59e | 623 | * so skip checking GC and FLUSH_MERGE conditions. |
696c018c | 624 | */ |
6b2920a5 | 625 | if (f2fs_readonly(sb) && (*flags & MS_RDONLY)) |
696c018c NJ |
626 | goto skip; |
627 | ||
628 | /* | |
629 | * We stop the GC thread if FS is mounted as RO | |
630 | * or if background_gc = off is passed in mount | |
631 | * option. Also sync the filesystem. | |
632 | */ | |
633 | if ((*flags & MS_RDONLY) || !test_opt(sbi, BG_GC)) { | |
634 | if (sbi->gc_thread) { | |
635 | stop_gc_thread(sbi); | |
636 | f2fs_sync_fs(sb, 1); | |
876dc59e | 637 | need_restart_gc = true; |
696c018c NJ |
638 | } |
639 | } else if (test_opt(sbi, BG_GC) && !sbi->gc_thread) { | |
640 | err = start_gc_thread(sbi); | |
641 | if (err) | |
642 | goto restore_opts; | |
876dc59e GZ |
643 | need_stop_gc = true; |
644 | } | |
645 | ||
646 | /* | |
647 | * We stop issue flush thread if FS is mounted as RO | |
648 | * or if flush_merge is not passed in mount option. | |
649 | */ | |
650 | if ((*flags & MS_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) { | |
2163d198 | 651 | destroy_flush_cmd_control(sbi); |
6b2920a5 | 652 | } else if (test_opt(sbi, FLUSH_MERGE) && !SM_I(sbi)->cmd_control_info) { |
2163d198 GZ |
653 | err = create_flush_cmd_control(sbi); |
654 | if (err) | |
a688b9d9 | 655 | goto restore_gc; |
696c018c NJ |
656 | } |
657 | skip: | |
658 | /* Update the POSIXACL Flag */ | |
659 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
660 | (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0); | |
661 | return 0; | |
876dc59e GZ |
662 | restore_gc: |
663 | if (need_restart_gc) { | |
664 | if (start_gc_thread(sbi)) | |
665 | f2fs_msg(sbi->sb, KERN_WARNING, | |
666 | "background gc thread is stop"); | |
667 | } else if (need_stop_gc) { | |
668 | stop_gc_thread(sbi); | |
669 | } | |
696c018c NJ |
670 | restore_opts: |
671 | sbi->mount_opt = org_mount_opt; | |
672 | sbi->active_logs = active_logs; | |
673 | return err; | |
674 | } | |
675 | ||
aff063e2 JK |
676 | static struct super_operations f2fs_sops = { |
677 | .alloc_inode = f2fs_alloc_inode, | |
531ad7d5 | 678 | .drop_inode = f2fs_drop_inode, |
aff063e2 JK |
679 | .destroy_inode = f2fs_destroy_inode, |
680 | .write_inode = f2fs_write_inode, | |
b3783873 | 681 | .dirty_inode = f2fs_dirty_inode, |
aff063e2 JK |
682 | .show_options = f2fs_show_options, |
683 | .evict_inode = f2fs_evict_inode, | |
684 | .put_super = f2fs_put_super, | |
685 | .sync_fs = f2fs_sync_fs, | |
d6212a5f CL |
686 | .freeze_fs = f2fs_freeze, |
687 | .unfreeze_fs = f2fs_unfreeze, | |
aff063e2 | 688 | .statfs = f2fs_statfs, |
696c018c | 689 | .remount_fs = f2fs_remount, |
aff063e2 JK |
690 | }; |
691 | ||
692 | static struct inode *f2fs_nfs_get_inode(struct super_block *sb, | |
693 | u64 ino, u32 generation) | |
694 | { | |
695 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
696 | struct inode *inode; | |
697 | ||
d6b7d4b3 | 698 | if (check_nid_range(sbi, ino)) |
910bb12d | 699 | return ERR_PTR(-ESTALE); |
aff063e2 JK |
700 | |
701 | /* | |
702 | * f2fs_iget isn't quite right if the inode is currently unallocated! | |
703 | * However f2fs_iget currently does appropriate checks to handle stale | |
704 | * inodes so everything is OK. | |
705 | */ | |
706 | inode = f2fs_iget(sb, ino); | |
707 | if (IS_ERR(inode)) | |
708 | return ERR_CAST(inode); | |
6bacf52f | 709 | if (unlikely(generation && inode->i_generation != generation)) { |
aff063e2 JK |
710 | /* we didn't find the right inode.. */ |
711 | iput(inode); | |
712 | return ERR_PTR(-ESTALE); | |
713 | } | |
714 | return inode; | |
715 | } | |
716 | ||
717 | static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
718 | int fh_len, int fh_type) | |
719 | { | |
720 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
721 | f2fs_nfs_get_inode); | |
722 | } | |
723 | ||
724 | static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid, | |
725 | int fh_len, int fh_type) | |
726 | { | |
727 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
728 | f2fs_nfs_get_inode); | |
729 | } | |
730 | ||
731 | static const struct export_operations f2fs_export_ops = { | |
732 | .fh_to_dentry = f2fs_fh_to_dentry, | |
733 | .fh_to_parent = f2fs_fh_to_parent, | |
734 | .get_parent = f2fs_get_parent, | |
735 | }; | |
736 | ||
aff063e2 JK |
737 | static loff_t max_file_size(unsigned bits) |
738 | { | |
de93653f | 739 | loff_t result = (DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS); |
aff063e2 JK |
740 | loff_t leaf_count = ADDRS_PER_BLOCK; |
741 | ||
742 | /* two direct node blocks */ | |
743 | result += (leaf_count * 2); | |
744 | ||
745 | /* two indirect node blocks */ | |
746 | leaf_count *= NIDS_PER_BLOCK; | |
747 | result += (leaf_count * 2); | |
748 | ||
749 | /* one double indirect node block */ | |
750 | leaf_count *= NIDS_PER_BLOCK; | |
751 | result += leaf_count; | |
752 | ||
753 | result <<= bits; | |
754 | return result; | |
755 | } | |
756 | ||
a07ef784 NJ |
757 | static int sanity_check_raw_super(struct super_block *sb, |
758 | struct f2fs_super_block *raw_super) | |
aff063e2 JK |
759 | { |
760 | unsigned int blocksize; | |
761 | ||
a07ef784 NJ |
762 | if (F2FS_SUPER_MAGIC != le32_to_cpu(raw_super->magic)) { |
763 | f2fs_msg(sb, KERN_INFO, | |
764 | "Magic Mismatch, valid(0x%x) - read(0x%x)", | |
765 | F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic)); | |
aff063e2 | 766 | return 1; |
a07ef784 | 767 | } |
aff063e2 | 768 | |
5c9b4692 | 769 | /* Currently, support only 4KB page cache size */ |
770 | if (F2FS_BLKSIZE != PAGE_CACHE_SIZE) { | |
771 | f2fs_msg(sb, KERN_INFO, | |
14d7e9de | 772 | "Invalid page_cache_size (%lu), supports only 4KB\n", |
5c9b4692 | 773 | PAGE_CACHE_SIZE); |
774 | return 1; | |
775 | } | |
776 | ||
aff063e2 JK |
777 | /* Currently, support only 4KB block size */ |
778 | blocksize = 1 << le32_to_cpu(raw_super->log_blocksize); | |
5c9b4692 | 779 | if (blocksize != F2FS_BLKSIZE) { |
a07ef784 NJ |
780 | f2fs_msg(sb, KERN_INFO, |
781 | "Invalid blocksize (%u), supports only 4KB\n", | |
782 | blocksize); | |
aff063e2 | 783 | return 1; |
a07ef784 | 784 | } |
5c9b4692 | 785 | |
aff063e2 | 786 | if (le32_to_cpu(raw_super->log_sectorsize) != |
a07ef784 NJ |
787 | F2FS_LOG_SECTOR_SIZE) { |
788 | f2fs_msg(sb, KERN_INFO, "Invalid log sectorsize"); | |
aff063e2 | 789 | return 1; |
a07ef784 | 790 | } |
aff063e2 | 791 | if (le32_to_cpu(raw_super->log_sectors_per_block) != |
a07ef784 NJ |
792 | F2FS_LOG_SECTORS_PER_BLOCK) { |
793 | f2fs_msg(sb, KERN_INFO, "Invalid log sectors per block"); | |
aff063e2 | 794 | return 1; |
a07ef784 | 795 | } |
aff063e2 JK |
796 | return 0; |
797 | } | |
798 | ||
577e3495 | 799 | static int sanity_check_ckpt(struct f2fs_sb_info *sbi) |
aff063e2 JK |
800 | { |
801 | unsigned int total, fsmeta; | |
577e3495 JK |
802 | struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); |
803 | struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); | |
aff063e2 JK |
804 | |
805 | total = le32_to_cpu(raw_super->segment_count); | |
806 | fsmeta = le32_to_cpu(raw_super->segment_count_ckpt); | |
807 | fsmeta += le32_to_cpu(raw_super->segment_count_sit); | |
808 | fsmeta += le32_to_cpu(raw_super->segment_count_nat); | |
809 | fsmeta += le32_to_cpu(ckpt->rsvd_segment_count); | |
810 | fsmeta += le32_to_cpu(raw_super->segment_count_ssa); | |
811 | ||
6bacf52f | 812 | if (unlikely(fsmeta >= total)) |
aff063e2 | 813 | return 1; |
577e3495 | 814 | |
6bacf52f | 815 | if (unlikely(is_set_ckpt_flags(ckpt, CP_ERROR_FLAG))) { |
577e3495 JK |
816 | f2fs_msg(sbi->sb, KERN_ERR, "A bug case: need to run fsck"); |
817 | return 1; | |
818 | } | |
aff063e2 JK |
819 | return 0; |
820 | } | |
821 | ||
822 | static void init_sb_info(struct f2fs_sb_info *sbi) | |
823 | { | |
824 | struct f2fs_super_block *raw_super = sbi->raw_super; | |
825 | int i; | |
826 | ||
827 | sbi->log_sectors_per_block = | |
828 | le32_to_cpu(raw_super->log_sectors_per_block); | |
829 | sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize); | |
830 | sbi->blocksize = 1 << sbi->log_blocksize; | |
831 | sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg); | |
832 | sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg; | |
833 | sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec); | |
834 | sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone); | |
835 | sbi->total_sections = le32_to_cpu(raw_super->section_count); | |
836 | sbi->total_node_count = | |
837 | (le32_to_cpu(raw_super->segment_count_nat) / 2) | |
838 | * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK; | |
839 | sbi->root_ino_num = le32_to_cpu(raw_super->root_ino); | |
840 | sbi->node_ino_num = le32_to_cpu(raw_super->node_ino); | |
841 | sbi->meta_ino_num = le32_to_cpu(raw_super->meta_ino); | |
5ec4e49f | 842 | sbi->cur_victim_sec = NULL_SECNO; |
b1c57c1c | 843 | sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH; |
aff063e2 JK |
844 | |
845 | for (i = 0; i < NR_COUNT_TYPE; i++) | |
846 | atomic_set(&sbi->nr_pages[i], 0); | |
ab9fa662 JK |
847 | |
848 | sbi->dir_level = DEF_DIR_LEVEL; | |
aff063e2 JK |
849 | } |
850 | ||
9076a75f GZ |
851 | /* |
852 | * Read f2fs raw super block. | |
853 | * Because we have two copies of super block, so read the first one at first, | |
854 | * if the first one is invalid, move to read the second one. | |
855 | */ | |
856 | static int read_raw_super_block(struct super_block *sb, | |
857 | struct f2fs_super_block **raw_super, | |
858 | struct buffer_head **raw_super_buf) | |
14d7e9de | 859 | { |
9076a75f | 860 | int block = 0; |
14d7e9de | 861 | |
9076a75f | 862 | retry: |
14d7e9de | 863 | *raw_super_buf = sb_bread(sb, block); |
864 | if (!*raw_super_buf) { | |
9076a75f GZ |
865 | f2fs_msg(sb, KERN_ERR, "Unable to read %dth superblock", |
866 | block + 1); | |
867 | if (block == 0) { | |
868 | block++; | |
869 | goto retry; | |
870 | } else { | |
871 | return -EIO; | |
872 | } | |
14d7e9de | 873 | } |
874 | ||
875 | *raw_super = (struct f2fs_super_block *) | |
876 | ((char *)(*raw_super_buf)->b_data + F2FS_SUPER_OFFSET); | |
877 | ||
878 | /* sanity checking of raw super */ | |
9076a75f GZ |
879 | if (sanity_check_raw_super(sb, *raw_super)) { |
880 | brelse(*raw_super_buf); | |
6c311ec6 CF |
881 | f2fs_msg(sb, KERN_ERR, |
882 | "Can't find valid F2FS filesystem in %dth superblock", | |
883 | block + 1); | |
6bacf52f | 884 | if (block == 0) { |
9076a75f GZ |
885 | block++; |
886 | goto retry; | |
887 | } else { | |
888 | return -EINVAL; | |
889 | } | |
890 | } | |
14d7e9de | 891 | |
9076a75f | 892 | return 0; |
14d7e9de | 893 | } |
894 | ||
aff063e2 JK |
895 | static int f2fs_fill_super(struct super_block *sb, void *data, int silent) |
896 | { | |
897 | struct f2fs_sb_info *sbi; | |
898 | struct f2fs_super_block *raw_super; | |
899 | struct buffer_head *raw_super_buf; | |
900 | struct inode *root; | |
901 | long err = -EINVAL; | |
971767ca | 902 | int i; |
aff063e2 JK |
903 | |
904 | /* allocate memory for f2fs-specific super block info */ | |
905 | sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL); | |
906 | if (!sbi) | |
907 | return -ENOMEM; | |
908 | ||
ff9234ad | 909 | /* set a block size */ |
6bacf52f | 910 | if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) { |
a07ef784 | 911 | f2fs_msg(sb, KERN_ERR, "unable to set blocksize"); |
aff063e2 | 912 | goto free_sbi; |
a07ef784 | 913 | } |
aff063e2 | 914 | |
9076a75f GZ |
915 | err = read_raw_super_block(sb, &raw_super, &raw_super_buf); |
916 | if (err) | |
917 | goto free_sbi; | |
918 | ||
5fb08372 | 919 | sb->s_fs_info = sbi; |
aff063e2 JK |
920 | /* init some FS parameters */ |
921 | sbi->active_logs = NR_CURSEG_TYPE; | |
922 | ||
923 | set_opt(sbi, BG_GC); | |
924 | ||
925 | #ifdef CONFIG_F2FS_FS_XATTR | |
926 | set_opt(sbi, XATTR_USER); | |
927 | #endif | |
928 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
929 | set_opt(sbi, POSIX_ACL); | |
930 | #endif | |
931 | /* parse mount options */ | |
5fb08372 | 932 | err = parse_options(sb, (char *)data); |
66348b72 | 933 | if (err) |
aff063e2 JK |
934 | goto free_sb_buf; |
935 | ||
25ca923b | 936 | sb->s_maxbytes = max_file_size(le32_to_cpu(raw_super->log_blocksize)); |
aff063e2 JK |
937 | sb->s_max_links = F2FS_LINK_MAX; |
938 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
939 | ||
940 | sb->s_op = &f2fs_sops; | |
941 | sb->s_xattr = f2fs_xattr_handlers; | |
942 | sb->s_export_op = &f2fs_export_ops; | |
943 | sb->s_magic = F2FS_SUPER_MAGIC; | |
aff063e2 JK |
944 | sb->s_time_gran = 1; |
945 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
946 | (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0); | |
947 | memcpy(sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid)); | |
948 | ||
949 | /* init f2fs-specific super block info */ | |
950 | sbi->sb = sb; | |
951 | sbi->raw_super = raw_super; | |
952 | sbi->raw_super_buf = raw_super_buf; | |
953 | mutex_init(&sbi->gc_mutex); | |
aff063e2 JK |
954 | mutex_init(&sbi->writepages); |
955 | mutex_init(&sbi->cp_mutex); | |
39936837 | 956 | mutex_init(&sbi->node_write); |
aabe5136 | 957 | sbi->por_doing = false; |
aff063e2 | 958 | spin_lock_init(&sbi->stat_lock); |
971767ca | 959 | |
df0f8dc0 | 960 | init_rwsem(&sbi->read_io.io_rwsem); |
458e6197 JK |
961 | sbi->read_io.sbi = sbi; |
962 | sbi->read_io.bio = NULL; | |
963 | for (i = 0; i < NR_PAGE_TYPE; i++) { | |
df0f8dc0 | 964 | init_rwsem(&sbi->write_io[i].io_rwsem); |
458e6197 JK |
965 | sbi->write_io[i].sbi = sbi; |
966 | sbi->write_io[i].bio = NULL; | |
967 | } | |
971767ca | 968 | |
e479556b | 969 | init_rwsem(&sbi->cp_rwsem); |
fb51b5ef | 970 | init_waitqueue_head(&sbi->cp_wait); |
aff063e2 JK |
971 | init_sb_info(sbi); |
972 | ||
973 | /* get an inode for meta space */ | |
974 | sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi)); | |
975 | if (IS_ERR(sbi->meta_inode)) { | |
a07ef784 | 976 | f2fs_msg(sb, KERN_ERR, "Failed to read F2FS meta data inode"); |
aff063e2 JK |
977 | err = PTR_ERR(sbi->meta_inode); |
978 | goto free_sb_buf; | |
979 | } | |
980 | ||
981 | err = get_valid_checkpoint(sbi); | |
a07ef784 NJ |
982 | if (err) { |
983 | f2fs_msg(sb, KERN_ERR, "Failed to get valid F2FS checkpoint"); | |
aff063e2 | 984 | goto free_meta_inode; |
a07ef784 | 985 | } |
aff063e2 JK |
986 | |
987 | /* sanity checking of checkpoint */ | |
988 | err = -EINVAL; | |
577e3495 | 989 | if (sanity_check_ckpt(sbi)) { |
a07ef784 | 990 | f2fs_msg(sb, KERN_ERR, "Invalid F2FS checkpoint"); |
aff063e2 | 991 | goto free_cp; |
a07ef784 | 992 | } |
aff063e2 JK |
993 | |
994 | sbi->total_valid_node_count = | |
995 | le32_to_cpu(sbi->ckpt->valid_node_count); | |
996 | sbi->total_valid_inode_count = | |
997 | le32_to_cpu(sbi->ckpt->valid_inode_count); | |
998 | sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count); | |
999 | sbi->total_valid_block_count = | |
1000 | le64_to_cpu(sbi->ckpt->valid_block_count); | |
1001 | sbi->last_valid_block_count = sbi->total_valid_block_count; | |
1002 | sbi->alloc_valid_block_count = 0; | |
1003 | INIT_LIST_HEAD(&sbi->dir_inode_list); | |
1004 | spin_lock_init(&sbi->dir_inode_lock); | |
1005 | ||
aff063e2 JK |
1006 | init_orphan_info(sbi); |
1007 | ||
1008 | /* setup f2fs internal modules */ | |
1009 | err = build_segment_manager(sbi); | |
a07ef784 NJ |
1010 | if (err) { |
1011 | f2fs_msg(sb, KERN_ERR, | |
1012 | "Failed to initialize F2FS segment manager"); | |
aff063e2 | 1013 | goto free_sm; |
a07ef784 | 1014 | } |
aff063e2 | 1015 | err = build_node_manager(sbi); |
a07ef784 NJ |
1016 | if (err) { |
1017 | f2fs_msg(sb, KERN_ERR, | |
1018 | "Failed to initialize F2FS node manager"); | |
aff063e2 | 1019 | goto free_nm; |
a07ef784 | 1020 | } |
aff063e2 JK |
1021 | |
1022 | build_gc_manager(sbi); | |
1023 | ||
1024 | /* get an inode for node space */ | |
1025 | sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi)); | |
1026 | if (IS_ERR(sbi->node_inode)) { | |
a07ef784 | 1027 | f2fs_msg(sb, KERN_ERR, "Failed to read node inode"); |
aff063e2 JK |
1028 | err = PTR_ERR(sbi->node_inode); |
1029 | goto free_nm; | |
1030 | } | |
1031 | ||
1032 | /* if there are nt orphan nodes free them */ | |
8f99a946 | 1033 | recover_orphan_inodes(sbi); |
aff063e2 JK |
1034 | |
1035 | /* read root inode and dentry */ | |
1036 | root = f2fs_iget(sb, F2FS_ROOT_INO(sbi)); | |
1037 | if (IS_ERR(root)) { | |
a07ef784 | 1038 | f2fs_msg(sb, KERN_ERR, "Failed to read root inode"); |
aff063e2 JK |
1039 | err = PTR_ERR(root); |
1040 | goto free_node_inode; | |
1041 | } | |
8f99a946 | 1042 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { |
9d847950 | 1043 | iput(root); |
8f99a946 | 1044 | err = -EINVAL; |
9d847950 | 1045 | goto free_node_inode; |
8f99a946 | 1046 | } |
aff063e2 JK |
1047 | |
1048 | sb->s_root = d_make_root(root); /* allocate root dentry */ | |
1049 | if (!sb->s_root) { | |
1050 | err = -ENOMEM; | |
1051 | goto free_root_inode; | |
1052 | } | |
1053 | ||
aff063e2 JK |
1054 | err = f2fs_build_stats(sbi); |
1055 | if (err) | |
6437d1b0 | 1056 | goto free_root_inode; |
aff063e2 | 1057 | |
5e176d54 JK |
1058 | if (f2fs_proc_root) |
1059 | sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root); | |
1060 | ||
1061 | if (sbi->s_proc) | |
1062 | proc_create_data("segment_info", S_IRUGO, sbi->s_proc, | |
1063 | &f2fs_seq_segment_info_fops, sb); | |
1064 | ||
d3ee456d NJ |
1065 | if (test_opt(sbi, DISCARD)) { |
1066 | struct request_queue *q = bdev_get_queue(sb->s_bdev); | |
1067 | if (!blk_queue_discard(q)) | |
1068 | f2fs_msg(sb, KERN_WARNING, | |
1069 | "mounting with \"discard\" option, but " | |
1070 | "the device does not support discard"); | |
1071 | } | |
1072 | ||
b59d0bae NJ |
1073 | sbi->s_kobj.kset = f2fs_kset; |
1074 | init_completion(&sbi->s_kobj_unregister); | |
1075 | err = kobject_init_and_add(&sbi->s_kobj, &f2fs_ktype, NULL, | |
1076 | "%s", sb->s_id); | |
1077 | if (err) | |
6437d1b0 | 1078 | goto free_proc; |
b59d0bae | 1079 | |
6437d1b0 JK |
1080 | /* recover fsynced data */ |
1081 | if (!test_opt(sbi, DISABLE_ROLL_FORWARD)) { | |
1082 | err = recover_fsync_data(sbi); | |
1083 | if (err) | |
1084 | f2fs_msg(sb, KERN_ERR, | |
1085 | "Cannot recover all fsync data errno=%ld", err); | |
1086 | } | |
b59d0bae | 1087 | |
6437d1b0 JK |
1088 | /* |
1089 | * If filesystem is not mounted as read-only then | |
1090 | * do start the gc_thread. | |
1091 | */ | |
6b2920a5 | 1092 | if (!f2fs_readonly(sb)) { |
6437d1b0 JK |
1093 | /* After POR, we can run background GC thread.*/ |
1094 | err = start_gc_thread(sbi); | |
1095 | if (err) | |
1096 | goto free_kobj; | |
1097 | } | |
aff063e2 | 1098 | return 0; |
6437d1b0 JK |
1099 | |
1100 | free_kobj: | |
1101 | kobject_del(&sbi->s_kobj); | |
1102 | free_proc: | |
1d15bd20 CY |
1103 | if (sbi->s_proc) { |
1104 | remove_proc_entry("segment_info", sbi->s_proc); | |
1105 | remove_proc_entry(sb->s_id, f2fs_proc_root); | |
1106 | } | |
1107 | f2fs_destroy_stats(sbi); | |
aff063e2 JK |
1108 | free_root_inode: |
1109 | dput(sb->s_root); | |
1110 | sb->s_root = NULL; | |
1111 | free_node_inode: | |
1112 | iput(sbi->node_inode); | |
1113 | free_nm: | |
1114 | destroy_node_manager(sbi); | |
1115 | free_sm: | |
1116 | destroy_segment_manager(sbi); | |
1117 | free_cp: | |
1118 | kfree(sbi->ckpt); | |
1119 | free_meta_inode: | |
1120 | make_bad_inode(sbi->meta_inode); | |
1121 | iput(sbi->meta_inode); | |
1122 | free_sb_buf: | |
1123 | brelse(raw_super_buf); | |
1124 | free_sbi: | |
1125 | kfree(sbi); | |
1126 | return err; | |
1127 | } | |
1128 | ||
1129 | static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags, | |
1130 | const char *dev_name, void *data) | |
1131 | { | |
1132 | return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super); | |
1133 | } | |
1134 | ||
1135 | static struct file_system_type f2fs_fs_type = { | |
1136 | .owner = THIS_MODULE, | |
1137 | .name = "f2fs", | |
1138 | .mount = f2fs_mount, | |
1139 | .kill_sb = kill_block_super, | |
1140 | .fs_flags = FS_REQUIRES_DEV, | |
1141 | }; | |
7f78e035 | 1142 | MODULE_ALIAS_FS("f2fs"); |
aff063e2 | 1143 | |
6e6093a8 | 1144 | static int __init init_inodecache(void) |
aff063e2 JK |
1145 | { |
1146 | f2fs_inode_cachep = f2fs_kmem_cache_create("f2fs_inode_cache", | |
e8512d2e | 1147 | sizeof(struct f2fs_inode_info)); |
6bacf52f | 1148 | if (!f2fs_inode_cachep) |
aff063e2 JK |
1149 | return -ENOMEM; |
1150 | return 0; | |
1151 | } | |
1152 | ||
1153 | static void destroy_inodecache(void) | |
1154 | { | |
1155 | /* | |
1156 | * Make sure all delayed rcu free inodes are flushed before we | |
1157 | * destroy cache. | |
1158 | */ | |
1159 | rcu_barrier(); | |
1160 | kmem_cache_destroy(f2fs_inode_cachep); | |
1161 | } | |
1162 | ||
1163 | static int __init init_f2fs_fs(void) | |
1164 | { | |
1165 | int err; | |
1166 | ||
1167 | err = init_inodecache(); | |
1168 | if (err) | |
1169 | goto fail; | |
1170 | err = create_node_manager_caches(); | |
1171 | if (err) | |
9890ff3f | 1172 | goto free_inodecache; |
7fd9e544 | 1173 | err = create_segment_manager_caches(); |
aff063e2 | 1174 | if (err) |
9890ff3f | 1175 | goto free_node_manager_caches; |
7fd9e544 JK |
1176 | err = create_gc_caches(); |
1177 | if (err) | |
1178 | goto free_segment_manager_caches; | |
aff063e2 JK |
1179 | err = create_checkpoint_caches(); |
1180 | if (err) | |
9890ff3f | 1181 | goto free_gc_caches; |
b59d0bae | 1182 | f2fs_kset = kset_create_and_add("f2fs", NULL, fs_kobj); |
6e6b978c WY |
1183 | if (!f2fs_kset) { |
1184 | err = -ENOMEM; | |
9890ff3f | 1185 | goto free_checkpoint_caches; |
6e6b978c | 1186 | } |
4589d25d NJ |
1187 | err = register_filesystem(&f2fs_fs_type); |
1188 | if (err) | |
9890ff3f | 1189 | goto free_kset; |
4589d25d | 1190 | f2fs_create_root_stats(); |
5e176d54 | 1191 | f2fs_proc_root = proc_mkdir("fs/f2fs", NULL); |
9890ff3f ZH |
1192 | return 0; |
1193 | ||
1194 | free_kset: | |
1195 | kset_unregister(f2fs_kset); | |
1196 | free_checkpoint_caches: | |
1197 | destroy_checkpoint_caches(); | |
1198 | free_gc_caches: | |
1199 | destroy_gc_caches(); | |
7fd9e544 JK |
1200 | free_segment_manager_caches: |
1201 | destroy_segment_manager_caches(); | |
9890ff3f ZH |
1202 | free_node_manager_caches: |
1203 | destroy_node_manager_caches(); | |
1204 | free_inodecache: | |
1205 | destroy_inodecache(); | |
aff063e2 JK |
1206 | fail: |
1207 | return err; | |
1208 | } | |
1209 | ||
1210 | static void __exit exit_f2fs_fs(void) | |
1211 | { | |
5e176d54 | 1212 | remove_proc_entry("fs/f2fs", NULL); |
4589d25d | 1213 | f2fs_destroy_root_stats(); |
aff063e2 JK |
1214 | unregister_filesystem(&f2fs_fs_type); |
1215 | destroy_checkpoint_caches(); | |
1216 | destroy_gc_caches(); | |
5dcd8a71 | 1217 | destroy_segment_manager_caches(); |
aff063e2 JK |
1218 | destroy_node_manager_caches(); |
1219 | destroy_inodecache(); | |
b59d0bae | 1220 | kset_unregister(f2fs_kset); |
aff063e2 JK |
1221 | } |
1222 | ||
1223 | module_init(init_f2fs_fs) | |
1224 | module_exit(exit_f2fs_fs) | |
1225 | ||
1226 | MODULE_AUTHOR("Samsung Electronics's Praesto Team"); | |
1227 | MODULE_DESCRIPTION("Flash Friendly File System"); | |
1228 | MODULE_LICENSE("GPL"); |