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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); | |
c1ce1b02 | 193 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks); |
cdfc41c1 | 194 | F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh); |
b1c57c1c | 195 | F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search); |
ab9fa662 | 196 | F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level); |
b59d0bae NJ |
197 | |
198 | #define ATTR_LIST(name) (&f2fs_attr_##name.attr) | |
199 | static struct attribute *f2fs_attrs[] = { | |
200 | ATTR_LIST(gc_min_sleep_time), | |
201 | ATTR_LIST(gc_max_sleep_time), | |
202 | ATTR_LIST(gc_no_gc_sleep_time), | |
d2dc095f | 203 | ATTR_LIST(gc_idle), |
ea91e9b0 | 204 | ATTR_LIST(reclaim_segments), |
7ac8c3b0 | 205 | ATTR_LIST(max_small_discards), |
216fbd64 JK |
206 | ATTR_LIST(ipu_policy), |
207 | ATTR_LIST(min_ipu_util), | |
c1ce1b02 | 208 | ATTR_LIST(min_fsync_blocks), |
b1c57c1c | 209 | ATTR_LIST(max_victim_search), |
ab9fa662 | 210 | ATTR_LIST(dir_level), |
cdfc41c1 | 211 | ATTR_LIST(ram_thresh), |
b59d0bae NJ |
212 | NULL, |
213 | }; | |
214 | ||
215 | static const struct sysfs_ops f2fs_attr_ops = { | |
216 | .show = f2fs_attr_show, | |
217 | .store = f2fs_attr_store, | |
218 | }; | |
219 | ||
220 | static struct kobj_type f2fs_ktype = { | |
221 | .default_attrs = f2fs_attrs, | |
222 | .sysfs_ops = &f2fs_attr_ops, | |
223 | .release = f2fs_sb_release, | |
224 | }; | |
225 | ||
a07ef784 NJ |
226 | void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...) |
227 | { | |
228 | struct va_format vaf; | |
229 | va_list args; | |
230 | ||
231 | va_start(args, fmt); | |
232 | vaf.fmt = fmt; | |
233 | vaf.va = &args; | |
234 | printk("%sF2FS-fs (%s): %pV\n", level, sb->s_id, &vaf); | |
235 | va_end(args); | |
236 | } | |
237 | ||
aff063e2 JK |
238 | static void init_once(void *foo) |
239 | { | |
240 | struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo; | |
241 | ||
aff063e2 JK |
242 | inode_init_once(&fi->vfs_inode); |
243 | } | |
244 | ||
696c018c NJ |
245 | static int parse_options(struct super_block *sb, char *options) |
246 | { | |
247 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
248 | substring_t args[MAX_OPT_ARGS]; | |
249 | char *p, *name; | |
250 | int arg = 0; | |
251 | ||
252 | if (!options) | |
253 | return 0; | |
254 | ||
255 | while ((p = strsep(&options, ",")) != NULL) { | |
256 | int token; | |
257 | if (!*p) | |
258 | continue; | |
259 | /* | |
260 | * Initialize args struct so we know whether arg was | |
261 | * found; some options take optional arguments. | |
262 | */ | |
263 | args[0].to = args[0].from = NULL; | |
264 | token = match_token(p, f2fs_tokens, args); | |
265 | ||
266 | switch (token) { | |
267 | case Opt_gc_background: | |
268 | name = match_strdup(&args[0]); | |
269 | ||
270 | if (!name) | |
271 | return -ENOMEM; | |
04c09388 | 272 | if (strlen(name) == 2 && !strncmp(name, "on", 2)) |
696c018c | 273 | set_opt(sbi, BG_GC); |
04c09388 | 274 | else if (strlen(name) == 3 && !strncmp(name, "off", 3)) |
696c018c NJ |
275 | clear_opt(sbi, BG_GC); |
276 | else { | |
277 | kfree(name); | |
278 | return -EINVAL; | |
279 | } | |
280 | kfree(name); | |
281 | break; | |
282 | case Opt_disable_roll_forward: | |
283 | set_opt(sbi, DISABLE_ROLL_FORWARD); | |
284 | break; | |
285 | case Opt_discard: | |
286 | set_opt(sbi, DISCARD); | |
287 | break; | |
288 | case Opt_noheap: | |
289 | set_opt(sbi, NOHEAP); | |
290 | break; | |
291 | #ifdef CONFIG_F2FS_FS_XATTR | |
4058c511 KA |
292 | case Opt_user_xattr: |
293 | set_opt(sbi, XATTR_USER); | |
294 | break; | |
696c018c NJ |
295 | case Opt_nouser_xattr: |
296 | clear_opt(sbi, XATTR_USER); | |
297 | break; | |
444c580f JK |
298 | case Opt_inline_xattr: |
299 | set_opt(sbi, INLINE_XATTR); | |
300 | break; | |
696c018c | 301 | #else |
4058c511 KA |
302 | case Opt_user_xattr: |
303 | f2fs_msg(sb, KERN_INFO, | |
304 | "user_xattr options not supported"); | |
305 | break; | |
696c018c NJ |
306 | case Opt_nouser_xattr: |
307 | f2fs_msg(sb, KERN_INFO, | |
308 | "nouser_xattr options not supported"); | |
309 | break; | |
444c580f JK |
310 | case Opt_inline_xattr: |
311 | f2fs_msg(sb, KERN_INFO, | |
312 | "inline_xattr options not supported"); | |
313 | break; | |
696c018c NJ |
314 | #endif |
315 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
4058c511 KA |
316 | case Opt_acl: |
317 | set_opt(sbi, POSIX_ACL); | |
318 | break; | |
696c018c NJ |
319 | case Opt_noacl: |
320 | clear_opt(sbi, POSIX_ACL); | |
321 | break; | |
322 | #else | |
4058c511 KA |
323 | case Opt_acl: |
324 | f2fs_msg(sb, KERN_INFO, "acl options not supported"); | |
325 | break; | |
696c018c NJ |
326 | case Opt_noacl: |
327 | f2fs_msg(sb, KERN_INFO, "noacl options not supported"); | |
328 | break; | |
329 | #endif | |
330 | case Opt_active_logs: | |
331 | if (args->from && match_int(args, &arg)) | |
332 | return -EINVAL; | |
333 | if (arg != 2 && arg != 4 && arg != NR_CURSEG_TYPE) | |
334 | return -EINVAL; | |
335 | sbi->active_logs = arg; | |
336 | break; | |
337 | case Opt_disable_ext_identify: | |
338 | set_opt(sbi, DISABLE_EXT_IDENTIFY); | |
339 | break; | |
8274de77 HL |
340 | case Opt_inline_data: |
341 | set_opt(sbi, INLINE_DATA); | |
342 | break; | |
6b4afdd7 JK |
343 | case Opt_flush_merge: |
344 | set_opt(sbi, FLUSH_MERGE); | |
345 | break; | |
0f7b2abd JK |
346 | case Opt_nobarrier: |
347 | set_opt(sbi, NOBARRIER); | |
348 | break; | |
696c018c NJ |
349 | default: |
350 | f2fs_msg(sb, KERN_ERR, | |
351 | "Unrecognized mount option \"%s\" or missing value", | |
352 | p); | |
353 | return -EINVAL; | |
354 | } | |
355 | } | |
356 | return 0; | |
357 | } | |
358 | ||
aff063e2 JK |
359 | static struct inode *f2fs_alloc_inode(struct super_block *sb) |
360 | { | |
361 | struct f2fs_inode_info *fi; | |
362 | ||
a0acdfe0 | 363 | fi = kmem_cache_alloc(f2fs_inode_cachep, GFP_F2FS_ZERO); |
aff063e2 JK |
364 | if (!fi) |
365 | return NULL; | |
366 | ||
367 | init_once((void *) fi); | |
368 | ||
434720fa | 369 | /* Initialize f2fs-specific inode info */ |
aff063e2 | 370 | fi->vfs_inode.i_version = 1; |
a7ffdbe2 | 371 | atomic_set(&fi->dirty_pages, 0); |
aff063e2 JK |
372 | fi->i_current_depth = 1; |
373 | fi->i_advise = 0; | |
374 | rwlock_init(&fi->ext.ext_lock); | |
d928bfbf | 375 | init_rwsem(&fi->i_sem); |
aff063e2 JK |
376 | |
377 | set_inode_flag(fi, FI_NEW_INODE); | |
378 | ||
444c580f JK |
379 | if (test_opt(F2FS_SB(sb), INLINE_XATTR)) |
380 | set_inode_flag(fi, FI_INLINE_XATTR); | |
381 | ||
ab9fa662 JK |
382 | /* Will be used by directory only */ |
383 | fi->i_dir_level = F2FS_SB(sb)->dir_level; | |
384 | ||
aff063e2 JK |
385 | return &fi->vfs_inode; |
386 | } | |
387 | ||
531ad7d5 JK |
388 | static int f2fs_drop_inode(struct inode *inode) |
389 | { | |
390 | /* | |
391 | * This is to avoid a deadlock condition like below. | |
392 | * writeback_single_inode(inode) | |
393 | * - f2fs_write_data_page | |
394 | * - f2fs_gc -> iput -> evict | |
395 | * - inode_wait_for_writeback(inode) | |
396 | */ | |
397 | if (!inode_unhashed(inode) && inode->i_state & I_SYNC) | |
398 | return 0; | |
399 | return generic_drop_inode(inode); | |
400 | } | |
401 | ||
b3783873 JK |
402 | /* |
403 | * f2fs_dirty_inode() is called from __mark_inode_dirty() | |
404 | * | |
405 | * We should call set_dirty_inode to write the dirty inode through write_inode. | |
406 | */ | |
407 | static void f2fs_dirty_inode(struct inode *inode, int flags) | |
408 | { | |
409 | set_inode_flag(F2FS_I(inode), FI_DIRTY_INODE); | |
b3783873 JK |
410 | } |
411 | ||
aff063e2 JK |
412 | static void f2fs_i_callback(struct rcu_head *head) |
413 | { | |
414 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
415 | kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode)); | |
416 | } | |
417 | ||
25ca923b | 418 | static void f2fs_destroy_inode(struct inode *inode) |
aff063e2 JK |
419 | { |
420 | call_rcu(&inode->i_rcu, f2fs_i_callback); | |
421 | } | |
422 | ||
423 | static void f2fs_put_super(struct super_block *sb) | |
424 | { | |
425 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
426 | ||
5e176d54 JK |
427 | if (sbi->s_proc) { |
428 | remove_proc_entry("segment_info", sbi->s_proc); | |
429 | remove_proc_entry(sb->s_id, f2fs_proc_root); | |
430 | } | |
b59d0bae | 431 | kobject_del(&sbi->s_kobj); |
5e176d54 | 432 | |
aff063e2 JK |
433 | f2fs_destroy_stats(sbi); |
434 | stop_gc_thread(sbi); | |
435 | ||
5887d291 | 436 | /* We don't need to do checkpoint when it's clean */ |
97c3c5ca | 437 | if (sbi->s_dirty) |
5887d291 | 438 | write_checkpoint(sbi, true); |
aff063e2 | 439 | |
cf779cab JK |
440 | /* |
441 | * normally superblock is clean, so we need to release this. | |
442 | * In addition, EIO will skip do checkpoint, we need this as well. | |
443 | */ | |
6f12ac25 JK |
444 | release_dirty_inode(sbi); |
445 | ||
aff063e2 JK |
446 | iput(sbi->node_inode); |
447 | iput(sbi->meta_inode); | |
448 | ||
449 | /* destroy f2fs internal modules */ | |
450 | destroy_node_manager(sbi); | |
451 | destroy_segment_manager(sbi); | |
452 | ||
453 | kfree(sbi->ckpt); | |
b59d0bae NJ |
454 | kobject_put(&sbi->s_kobj); |
455 | wait_for_completion(&sbi->s_kobj_unregister); | |
aff063e2 JK |
456 | |
457 | sb->s_fs_info = NULL; | |
458 | brelse(sbi->raw_super_buf); | |
459 | kfree(sbi); | |
460 | } | |
461 | ||
462 | int f2fs_sync_fs(struct super_block *sb, int sync) | |
463 | { | |
464 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
aff063e2 | 465 | |
a2a4a7e4 NJ |
466 | trace_f2fs_sync_fs(sb, sync); |
467 | ||
b7473754 JK |
468 | if (sync) { |
469 | mutex_lock(&sbi->gc_mutex); | |
43727527 | 470 | write_checkpoint(sbi, false); |
b7473754 JK |
471 | mutex_unlock(&sbi->gc_mutex); |
472 | } else { | |
7d82db83 | 473 | f2fs_balance_fs(sbi); |
b7473754 | 474 | } |
aff063e2 | 475 | |
64c576fe | 476 | return 0; |
aff063e2 JK |
477 | } |
478 | ||
d6212a5f CL |
479 | static int f2fs_freeze(struct super_block *sb) |
480 | { | |
481 | int err; | |
482 | ||
77888c1e | 483 | if (f2fs_readonly(sb)) |
d6212a5f CL |
484 | return 0; |
485 | ||
486 | err = f2fs_sync_fs(sb, 1); | |
487 | return err; | |
488 | } | |
489 | ||
490 | static int f2fs_unfreeze(struct super_block *sb) | |
491 | { | |
492 | return 0; | |
493 | } | |
494 | ||
aff063e2 JK |
495 | static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf) |
496 | { | |
497 | struct super_block *sb = dentry->d_sb; | |
498 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
499 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); | |
500 | block_t total_count, user_block_count, start_count, ovp_count; | |
501 | ||
502 | total_count = le64_to_cpu(sbi->raw_super->block_count); | |
503 | user_block_count = sbi->user_block_count; | |
504 | start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr); | |
505 | ovp_count = SM_I(sbi)->ovp_segments << sbi->log_blocks_per_seg; | |
506 | buf->f_type = F2FS_SUPER_MAGIC; | |
507 | buf->f_bsize = sbi->blocksize; | |
508 | ||
509 | buf->f_blocks = total_count - start_count; | |
510 | buf->f_bfree = buf->f_blocks - valid_user_blocks(sbi) - ovp_count; | |
511 | buf->f_bavail = user_block_count - valid_user_blocks(sbi); | |
512 | ||
c200b1aa CY |
513 | buf->f_files = sbi->total_node_count - F2FS_RESERVED_NODE_NUM; |
514 | buf->f_ffree = buf->f_files - valid_inode_count(sbi); | |
aff063e2 | 515 | |
5a20d339 | 516 | buf->f_namelen = F2FS_NAME_LEN; |
aff063e2 JK |
517 | buf->f_fsid.val[0] = (u32)id; |
518 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
519 | ||
520 | return 0; | |
521 | } | |
522 | ||
523 | static int f2fs_show_options(struct seq_file *seq, struct dentry *root) | |
524 | { | |
525 | struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb); | |
526 | ||
b270ad6f | 527 | if (!f2fs_readonly(sbi->sb) && test_opt(sbi, BG_GC)) |
696c018c | 528 | seq_printf(seq, ",background_gc=%s", "on"); |
aff063e2 | 529 | else |
696c018c | 530 | seq_printf(seq, ",background_gc=%s", "off"); |
aff063e2 JK |
531 | if (test_opt(sbi, DISABLE_ROLL_FORWARD)) |
532 | seq_puts(seq, ",disable_roll_forward"); | |
533 | if (test_opt(sbi, DISCARD)) | |
534 | seq_puts(seq, ",discard"); | |
535 | if (test_opt(sbi, NOHEAP)) | |
536 | seq_puts(seq, ",no_heap_alloc"); | |
537 | #ifdef CONFIG_F2FS_FS_XATTR | |
538 | if (test_opt(sbi, XATTR_USER)) | |
539 | seq_puts(seq, ",user_xattr"); | |
540 | else | |
541 | seq_puts(seq, ",nouser_xattr"); | |
444c580f JK |
542 | if (test_opt(sbi, INLINE_XATTR)) |
543 | seq_puts(seq, ",inline_xattr"); | |
aff063e2 JK |
544 | #endif |
545 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
546 | if (test_opt(sbi, POSIX_ACL)) | |
547 | seq_puts(seq, ",acl"); | |
548 | else | |
549 | seq_puts(seq, ",noacl"); | |
550 | #endif | |
551 | if (test_opt(sbi, DISABLE_EXT_IDENTIFY)) | |
aa43507f | 552 | seq_puts(seq, ",disable_ext_identify"); |
8274de77 HL |
553 | if (test_opt(sbi, INLINE_DATA)) |
554 | seq_puts(seq, ",inline_data"); | |
b270ad6f | 555 | if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE)) |
6b4afdd7 | 556 | seq_puts(seq, ",flush_merge"); |
0f7b2abd JK |
557 | if (test_opt(sbi, NOBARRIER)) |
558 | seq_puts(seq, ",nobarrier"); | |
aff063e2 JK |
559 | seq_printf(seq, ",active_logs=%u", sbi->active_logs); |
560 | ||
561 | return 0; | |
562 | } | |
563 | ||
5e176d54 JK |
564 | static int segment_info_seq_show(struct seq_file *seq, void *offset) |
565 | { | |
566 | struct super_block *sb = seq->private; | |
567 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
6c311ec6 CF |
568 | unsigned int total_segs = |
569 | le32_to_cpu(sbi->raw_super->segment_count_main); | |
5e176d54 JK |
570 | int i; |
571 | ||
90aa6dc9 CY |
572 | seq_puts(seq, "format: segment_type|valid_blocks\n" |
573 | "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n"); | |
574 | ||
5e176d54 | 575 | for (i = 0; i < total_segs; i++) { |
90aa6dc9 CY |
576 | struct seg_entry *se = get_seg_entry(sbi, i); |
577 | ||
578 | if ((i % 10) == 0) | |
579 | seq_printf(seq, "%-5d", i); | |
580 | seq_printf(seq, "%d|%-3u", se->type, | |
581 | get_valid_blocks(sbi, i, 1)); | |
46c04366 GZ |
582 | if ((i % 10) == 9 || i == (total_segs - 1)) |
583 | seq_putc(seq, '\n'); | |
5e176d54 | 584 | else |
46c04366 | 585 | seq_putc(seq, ' '); |
5e176d54 | 586 | } |
46c04366 | 587 | |
5e176d54 JK |
588 | return 0; |
589 | } | |
590 | ||
591 | static int segment_info_open_fs(struct inode *inode, struct file *file) | |
592 | { | |
593 | return single_open(file, segment_info_seq_show, PDE_DATA(inode)); | |
594 | } | |
595 | ||
596 | static const struct file_operations f2fs_seq_segment_info_fops = { | |
597 | .owner = THIS_MODULE, | |
598 | .open = segment_info_open_fs, | |
599 | .read = seq_read, | |
600 | .llseek = seq_lseek, | |
601 | .release = single_release, | |
602 | }; | |
603 | ||
696c018c NJ |
604 | static int f2fs_remount(struct super_block *sb, int *flags, char *data) |
605 | { | |
606 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
607 | struct f2fs_mount_info org_mount_opt; | |
608 | int err, active_logs; | |
876dc59e GZ |
609 | bool need_restart_gc = false; |
610 | bool need_stop_gc = false; | |
696c018c | 611 | |
02b9984d TT |
612 | sync_filesystem(sb); |
613 | ||
696c018c NJ |
614 | /* |
615 | * Save the old mount options in case we | |
616 | * need to restore them. | |
617 | */ | |
618 | org_mount_opt = sbi->mount_opt; | |
619 | active_logs = sbi->active_logs; | |
620 | ||
621 | /* parse mount options */ | |
622 | err = parse_options(sb, data); | |
623 | if (err) | |
624 | goto restore_opts; | |
625 | ||
626 | /* | |
627 | * Previous and new state of filesystem is RO, | |
876dc59e | 628 | * so skip checking GC and FLUSH_MERGE conditions. |
696c018c | 629 | */ |
6b2920a5 | 630 | if (f2fs_readonly(sb) && (*flags & MS_RDONLY)) |
696c018c NJ |
631 | goto skip; |
632 | ||
633 | /* | |
634 | * We stop the GC thread if FS is mounted as RO | |
635 | * or if background_gc = off is passed in mount | |
636 | * option. Also sync the filesystem. | |
637 | */ | |
638 | if ((*flags & MS_RDONLY) || !test_opt(sbi, BG_GC)) { | |
639 | if (sbi->gc_thread) { | |
640 | stop_gc_thread(sbi); | |
641 | f2fs_sync_fs(sb, 1); | |
876dc59e | 642 | need_restart_gc = true; |
696c018c NJ |
643 | } |
644 | } else if (test_opt(sbi, BG_GC) && !sbi->gc_thread) { | |
645 | err = start_gc_thread(sbi); | |
646 | if (err) | |
647 | goto restore_opts; | |
876dc59e GZ |
648 | need_stop_gc = true; |
649 | } | |
650 | ||
651 | /* | |
652 | * We stop issue flush thread if FS is mounted as RO | |
653 | * or if flush_merge is not passed in mount option. | |
654 | */ | |
655 | if ((*flags & MS_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) { | |
2163d198 | 656 | destroy_flush_cmd_control(sbi); |
6b2920a5 | 657 | } else if (test_opt(sbi, FLUSH_MERGE) && !SM_I(sbi)->cmd_control_info) { |
2163d198 GZ |
658 | err = create_flush_cmd_control(sbi); |
659 | if (err) | |
a688b9d9 | 660 | goto restore_gc; |
696c018c NJ |
661 | } |
662 | skip: | |
663 | /* Update the POSIXACL Flag */ | |
664 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
665 | (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0); | |
666 | return 0; | |
876dc59e GZ |
667 | restore_gc: |
668 | if (need_restart_gc) { | |
669 | if (start_gc_thread(sbi)) | |
670 | f2fs_msg(sbi->sb, KERN_WARNING, | |
e1c42045 | 671 | "background gc thread has stopped"); |
876dc59e GZ |
672 | } else if (need_stop_gc) { |
673 | stop_gc_thread(sbi); | |
674 | } | |
696c018c NJ |
675 | restore_opts: |
676 | sbi->mount_opt = org_mount_opt; | |
677 | sbi->active_logs = active_logs; | |
678 | return err; | |
679 | } | |
680 | ||
aff063e2 JK |
681 | static struct super_operations f2fs_sops = { |
682 | .alloc_inode = f2fs_alloc_inode, | |
531ad7d5 | 683 | .drop_inode = f2fs_drop_inode, |
aff063e2 JK |
684 | .destroy_inode = f2fs_destroy_inode, |
685 | .write_inode = f2fs_write_inode, | |
b3783873 | 686 | .dirty_inode = f2fs_dirty_inode, |
aff063e2 JK |
687 | .show_options = f2fs_show_options, |
688 | .evict_inode = f2fs_evict_inode, | |
689 | .put_super = f2fs_put_super, | |
690 | .sync_fs = f2fs_sync_fs, | |
d6212a5f CL |
691 | .freeze_fs = f2fs_freeze, |
692 | .unfreeze_fs = f2fs_unfreeze, | |
aff063e2 | 693 | .statfs = f2fs_statfs, |
696c018c | 694 | .remount_fs = f2fs_remount, |
aff063e2 JK |
695 | }; |
696 | ||
697 | static struct inode *f2fs_nfs_get_inode(struct super_block *sb, | |
698 | u64 ino, u32 generation) | |
699 | { | |
700 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
701 | struct inode *inode; | |
702 | ||
d6b7d4b3 | 703 | if (check_nid_range(sbi, ino)) |
910bb12d | 704 | return ERR_PTR(-ESTALE); |
aff063e2 JK |
705 | |
706 | /* | |
707 | * f2fs_iget isn't quite right if the inode is currently unallocated! | |
708 | * However f2fs_iget currently does appropriate checks to handle stale | |
709 | * inodes so everything is OK. | |
710 | */ | |
711 | inode = f2fs_iget(sb, ino); | |
712 | if (IS_ERR(inode)) | |
713 | return ERR_CAST(inode); | |
6bacf52f | 714 | if (unlikely(generation && inode->i_generation != generation)) { |
aff063e2 JK |
715 | /* we didn't find the right inode.. */ |
716 | iput(inode); | |
717 | return ERR_PTR(-ESTALE); | |
718 | } | |
719 | return inode; | |
720 | } | |
721 | ||
722 | static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
723 | int fh_len, int fh_type) | |
724 | { | |
725 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
726 | f2fs_nfs_get_inode); | |
727 | } | |
728 | ||
729 | static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid, | |
730 | int fh_len, int fh_type) | |
731 | { | |
732 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
733 | f2fs_nfs_get_inode); | |
734 | } | |
735 | ||
736 | static const struct export_operations f2fs_export_ops = { | |
737 | .fh_to_dentry = f2fs_fh_to_dentry, | |
738 | .fh_to_parent = f2fs_fh_to_parent, | |
739 | .get_parent = f2fs_get_parent, | |
740 | }; | |
741 | ||
aff063e2 JK |
742 | static loff_t max_file_size(unsigned bits) |
743 | { | |
de93653f | 744 | loff_t result = (DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS); |
aff063e2 JK |
745 | loff_t leaf_count = ADDRS_PER_BLOCK; |
746 | ||
747 | /* two direct node blocks */ | |
748 | result += (leaf_count * 2); | |
749 | ||
750 | /* two indirect node blocks */ | |
751 | leaf_count *= NIDS_PER_BLOCK; | |
752 | result += (leaf_count * 2); | |
753 | ||
754 | /* one double indirect node block */ | |
755 | leaf_count *= NIDS_PER_BLOCK; | |
756 | result += leaf_count; | |
757 | ||
758 | result <<= bits; | |
759 | return result; | |
760 | } | |
761 | ||
a07ef784 NJ |
762 | static int sanity_check_raw_super(struct super_block *sb, |
763 | struct f2fs_super_block *raw_super) | |
aff063e2 JK |
764 | { |
765 | unsigned int blocksize; | |
766 | ||
a07ef784 NJ |
767 | if (F2FS_SUPER_MAGIC != le32_to_cpu(raw_super->magic)) { |
768 | f2fs_msg(sb, KERN_INFO, | |
769 | "Magic Mismatch, valid(0x%x) - read(0x%x)", | |
770 | F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic)); | |
aff063e2 | 771 | return 1; |
a07ef784 | 772 | } |
aff063e2 | 773 | |
5c9b4692 | 774 | /* Currently, support only 4KB page cache size */ |
775 | if (F2FS_BLKSIZE != PAGE_CACHE_SIZE) { | |
776 | f2fs_msg(sb, KERN_INFO, | |
14d7e9de | 777 | "Invalid page_cache_size (%lu), supports only 4KB\n", |
5c9b4692 | 778 | PAGE_CACHE_SIZE); |
779 | return 1; | |
780 | } | |
781 | ||
aff063e2 JK |
782 | /* Currently, support only 4KB block size */ |
783 | blocksize = 1 << le32_to_cpu(raw_super->log_blocksize); | |
5c9b4692 | 784 | if (blocksize != F2FS_BLKSIZE) { |
a07ef784 NJ |
785 | f2fs_msg(sb, KERN_INFO, |
786 | "Invalid blocksize (%u), supports only 4KB\n", | |
787 | blocksize); | |
aff063e2 | 788 | return 1; |
a07ef784 | 789 | } |
5c9b4692 | 790 | |
aff063e2 | 791 | if (le32_to_cpu(raw_super->log_sectorsize) != |
a07ef784 NJ |
792 | F2FS_LOG_SECTOR_SIZE) { |
793 | f2fs_msg(sb, KERN_INFO, "Invalid log sectorsize"); | |
aff063e2 | 794 | return 1; |
a07ef784 | 795 | } |
aff063e2 | 796 | if (le32_to_cpu(raw_super->log_sectors_per_block) != |
a07ef784 NJ |
797 | F2FS_LOG_SECTORS_PER_BLOCK) { |
798 | f2fs_msg(sb, KERN_INFO, "Invalid log sectors per block"); | |
aff063e2 | 799 | return 1; |
a07ef784 | 800 | } |
aff063e2 JK |
801 | return 0; |
802 | } | |
803 | ||
577e3495 | 804 | static int sanity_check_ckpt(struct f2fs_sb_info *sbi) |
aff063e2 JK |
805 | { |
806 | unsigned int total, fsmeta; | |
577e3495 JK |
807 | struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); |
808 | struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); | |
aff063e2 JK |
809 | |
810 | total = le32_to_cpu(raw_super->segment_count); | |
811 | fsmeta = le32_to_cpu(raw_super->segment_count_ckpt); | |
812 | fsmeta += le32_to_cpu(raw_super->segment_count_sit); | |
813 | fsmeta += le32_to_cpu(raw_super->segment_count_nat); | |
814 | fsmeta += le32_to_cpu(ckpt->rsvd_segment_count); | |
815 | fsmeta += le32_to_cpu(raw_super->segment_count_ssa); | |
816 | ||
6bacf52f | 817 | if (unlikely(fsmeta >= total)) |
aff063e2 | 818 | return 1; |
577e3495 | 819 | |
1e968fdf | 820 | if (unlikely(f2fs_cp_error(sbi))) { |
577e3495 JK |
821 | f2fs_msg(sbi->sb, KERN_ERR, "A bug case: need to run fsck"); |
822 | return 1; | |
823 | } | |
aff063e2 JK |
824 | return 0; |
825 | } | |
826 | ||
827 | static void init_sb_info(struct f2fs_sb_info *sbi) | |
828 | { | |
829 | struct f2fs_super_block *raw_super = sbi->raw_super; | |
830 | int i; | |
831 | ||
832 | sbi->log_sectors_per_block = | |
833 | le32_to_cpu(raw_super->log_sectors_per_block); | |
834 | sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize); | |
835 | sbi->blocksize = 1 << sbi->log_blocksize; | |
836 | sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg); | |
837 | sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg; | |
838 | sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec); | |
839 | sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone); | |
840 | sbi->total_sections = le32_to_cpu(raw_super->section_count); | |
841 | sbi->total_node_count = | |
842 | (le32_to_cpu(raw_super->segment_count_nat) / 2) | |
843 | * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK; | |
844 | sbi->root_ino_num = le32_to_cpu(raw_super->root_ino); | |
845 | sbi->node_ino_num = le32_to_cpu(raw_super->node_ino); | |
846 | sbi->meta_ino_num = le32_to_cpu(raw_super->meta_ino); | |
5ec4e49f | 847 | sbi->cur_victim_sec = NULL_SECNO; |
b1c57c1c | 848 | sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH; |
aff063e2 JK |
849 | |
850 | for (i = 0; i < NR_COUNT_TYPE; i++) | |
851 | atomic_set(&sbi->nr_pages[i], 0); | |
ab9fa662 JK |
852 | |
853 | sbi->dir_level = DEF_DIR_LEVEL; | |
2ae4c673 | 854 | sbi->need_fsck = false; |
aff063e2 JK |
855 | } |
856 | ||
9076a75f GZ |
857 | /* |
858 | * Read f2fs raw super block. | |
859 | * Because we have two copies of super block, so read the first one at first, | |
860 | * if the first one is invalid, move to read the second one. | |
861 | */ | |
862 | static int read_raw_super_block(struct super_block *sb, | |
863 | struct f2fs_super_block **raw_super, | |
864 | struct buffer_head **raw_super_buf) | |
14d7e9de | 865 | { |
9076a75f | 866 | int block = 0; |
14d7e9de | 867 | |
9076a75f | 868 | retry: |
14d7e9de | 869 | *raw_super_buf = sb_bread(sb, block); |
870 | if (!*raw_super_buf) { | |
9076a75f GZ |
871 | f2fs_msg(sb, KERN_ERR, "Unable to read %dth superblock", |
872 | block + 1); | |
873 | if (block == 0) { | |
874 | block++; | |
875 | goto retry; | |
876 | } else { | |
877 | return -EIO; | |
878 | } | |
14d7e9de | 879 | } |
880 | ||
881 | *raw_super = (struct f2fs_super_block *) | |
882 | ((char *)(*raw_super_buf)->b_data + F2FS_SUPER_OFFSET); | |
883 | ||
884 | /* sanity checking of raw super */ | |
9076a75f GZ |
885 | if (sanity_check_raw_super(sb, *raw_super)) { |
886 | brelse(*raw_super_buf); | |
6c311ec6 CF |
887 | f2fs_msg(sb, KERN_ERR, |
888 | "Can't find valid F2FS filesystem in %dth superblock", | |
889 | block + 1); | |
6bacf52f | 890 | if (block == 0) { |
9076a75f GZ |
891 | block++; |
892 | goto retry; | |
893 | } else { | |
894 | return -EINVAL; | |
895 | } | |
896 | } | |
14d7e9de | 897 | |
9076a75f | 898 | return 0; |
14d7e9de | 899 | } |
900 | ||
aff063e2 JK |
901 | static int f2fs_fill_super(struct super_block *sb, void *data, int silent) |
902 | { | |
903 | struct f2fs_sb_info *sbi; | |
904 | struct f2fs_super_block *raw_super; | |
905 | struct buffer_head *raw_super_buf; | |
906 | struct inode *root; | |
907 | long err = -EINVAL; | |
ed2e621a | 908 | bool retry = true; |
971767ca | 909 | int i; |
aff063e2 | 910 | |
ed2e621a | 911 | try_onemore: |
aff063e2 JK |
912 | /* allocate memory for f2fs-specific super block info */ |
913 | sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL); | |
914 | if (!sbi) | |
915 | return -ENOMEM; | |
916 | ||
ff9234ad | 917 | /* set a block size */ |
6bacf52f | 918 | if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) { |
a07ef784 | 919 | f2fs_msg(sb, KERN_ERR, "unable to set blocksize"); |
aff063e2 | 920 | goto free_sbi; |
a07ef784 | 921 | } |
aff063e2 | 922 | |
9076a75f GZ |
923 | err = read_raw_super_block(sb, &raw_super, &raw_super_buf); |
924 | if (err) | |
925 | goto free_sbi; | |
926 | ||
5fb08372 | 927 | sb->s_fs_info = sbi; |
aff063e2 JK |
928 | /* init some FS parameters */ |
929 | sbi->active_logs = NR_CURSEG_TYPE; | |
930 | ||
931 | set_opt(sbi, BG_GC); | |
932 | ||
933 | #ifdef CONFIG_F2FS_FS_XATTR | |
934 | set_opt(sbi, XATTR_USER); | |
935 | #endif | |
936 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
937 | set_opt(sbi, POSIX_ACL); | |
938 | #endif | |
939 | /* parse mount options */ | |
5fb08372 | 940 | err = parse_options(sb, (char *)data); |
66348b72 | 941 | if (err) |
aff063e2 JK |
942 | goto free_sb_buf; |
943 | ||
25ca923b | 944 | sb->s_maxbytes = max_file_size(le32_to_cpu(raw_super->log_blocksize)); |
aff063e2 JK |
945 | sb->s_max_links = F2FS_LINK_MAX; |
946 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
947 | ||
948 | sb->s_op = &f2fs_sops; | |
949 | sb->s_xattr = f2fs_xattr_handlers; | |
950 | sb->s_export_op = &f2fs_export_ops; | |
951 | sb->s_magic = F2FS_SUPER_MAGIC; | |
aff063e2 JK |
952 | sb->s_time_gran = 1; |
953 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
954 | (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0); | |
955 | memcpy(sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid)); | |
956 | ||
957 | /* init f2fs-specific super block info */ | |
958 | sbi->sb = sb; | |
959 | sbi->raw_super = raw_super; | |
960 | sbi->raw_super_buf = raw_super_buf; | |
961 | mutex_init(&sbi->gc_mutex); | |
aff063e2 JK |
962 | mutex_init(&sbi->writepages); |
963 | mutex_init(&sbi->cp_mutex); | |
b3582c68 | 964 | init_rwsem(&sbi->node_write); |
aabe5136 | 965 | sbi->por_doing = false; |
aff063e2 | 966 | spin_lock_init(&sbi->stat_lock); |
971767ca | 967 | |
df0f8dc0 | 968 | init_rwsem(&sbi->read_io.io_rwsem); |
458e6197 JK |
969 | sbi->read_io.sbi = sbi; |
970 | sbi->read_io.bio = NULL; | |
971 | for (i = 0; i < NR_PAGE_TYPE; i++) { | |
df0f8dc0 | 972 | init_rwsem(&sbi->write_io[i].io_rwsem); |
458e6197 JK |
973 | sbi->write_io[i].sbi = sbi; |
974 | sbi->write_io[i].bio = NULL; | |
975 | } | |
971767ca | 976 | |
e479556b | 977 | init_rwsem(&sbi->cp_rwsem); |
fb51b5ef | 978 | init_waitqueue_head(&sbi->cp_wait); |
aff063e2 JK |
979 | init_sb_info(sbi); |
980 | ||
981 | /* get an inode for meta space */ | |
982 | sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi)); | |
983 | if (IS_ERR(sbi->meta_inode)) { | |
a07ef784 | 984 | f2fs_msg(sb, KERN_ERR, "Failed to read F2FS meta data inode"); |
aff063e2 JK |
985 | err = PTR_ERR(sbi->meta_inode); |
986 | goto free_sb_buf; | |
987 | } | |
988 | ||
989 | err = get_valid_checkpoint(sbi); | |
a07ef784 NJ |
990 | if (err) { |
991 | f2fs_msg(sb, KERN_ERR, "Failed to get valid F2FS checkpoint"); | |
aff063e2 | 992 | goto free_meta_inode; |
a07ef784 | 993 | } |
aff063e2 JK |
994 | |
995 | /* sanity checking of checkpoint */ | |
996 | err = -EINVAL; | |
577e3495 | 997 | if (sanity_check_ckpt(sbi)) { |
a07ef784 | 998 | f2fs_msg(sb, KERN_ERR, "Invalid F2FS checkpoint"); |
aff063e2 | 999 | goto free_cp; |
a07ef784 | 1000 | } |
aff063e2 JK |
1001 | |
1002 | sbi->total_valid_node_count = | |
1003 | le32_to_cpu(sbi->ckpt->valid_node_count); | |
1004 | sbi->total_valid_inode_count = | |
1005 | le32_to_cpu(sbi->ckpt->valid_inode_count); | |
1006 | sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count); | |
1007 | sbi->total_valid_block_count = | |
1008 | le64_to_cpu(sbi->ckpt->valid_block_count); | |
1009 | sbi->last_valid_block_count = sbi->total_valid_block_count; | |
1010 | sbi->alloc_valid_block_count = 0; | |
1011 | INIT_LIST_HEAD(&sbi->dir_inode_list); | |
1012 | spin_lock_init(&sbi->dir_inode_lock); | |
1013 | ||
6451e041 | 1014 | init_ino_entry_info(sbi); |
aff063e2 JK |
1015 | |
1016 | /* setup f2fs internal modules */ | |
1017 | err = build_segment_manager(sbi); | |
a07ef784 NJ |
1018 | if (err) { |
1019 | f2fs_msg(sb, KERN_ERR, | |
1020 | "Failed to initialize F2FS segment manager"); | |
aff063e2 | 1021 | goto free_sm; |
a07ef784 | 1022 | } |
aff063e2 | 1023 | err = build_node_manager(sbi); |
a07ef784 NJ |
1024 | if (err) { |
1025 | f2fs_msg(sb, KERN_ERR, | |
1026 | "Failed to initialize F2FS node manager"); | |
aff063e2 | 1027 | goto free_nm; |
a07ef784 | 1028 | } |
aff063e2 JK |
1029 | |
1030 | build_gc_manager(sbi); | |
1031 | ||
1032 | /* get an inode for node space */ | |
1033 | sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi)); | |
1034 | if (IS_ERR(sbi->node_inode)) { | |
a07ef784 | 1035 | f2fs_msg(sb, KERN_ERR, "Failed to read node inode"); |
aff063e2 JK |
1036 | err = PTR_ERR(sbi->node_inode); |
1037 | goto free_nm; | |
1038 | } | |
1039 | ||
1040 | /* if there are nt orphan nodes free them */ | |
8f99a946 | 1041 | recover_orphan_inodes(sbi); |
aff063e2 JK |
1042 | |
1043 | /* read root inode and dentry */ | |
1044 | root = f2fs_iget(sb, F2FS_ROOT_INO(sbi)); | |
1045 | if (IS_ERR(root)) { | |
a07ef784 | 1046 | f2fs_msg(sb, KERN_ERR, "Failed to read root inode"); |
aff063e2 JK |
1047 | err = PTR_ERR(root); |
1048 | goto free_node_inode; | |
1049 | } | |
8f99a946 | 1050 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { |
9d847950 | 1051 | iput(root); |
8f99a946 | 1052 | err = -EINVAL; |
9d847950 | 1053 | goto free_node_inode; |
8f99a946 | 1054 | } |
aff063e2 JK |
1055 | |
1056 | sb->s_root = d_make_root(root); /* allocate root dentry */ | |
1057 | if (!sb->s_root) { | |
1058 | err = -ENOMEM; | |
1059 | goto free_root_inode; | |
1060 | } | |
1061 | ||
aff063e2 JK |
1062 | err = f2fs_build_stats(sbi); |
1063 | if (err) | |
6437d1b0 | 1064 | goto free_root_inode; |
aff063e2 | 1065 | |
5e176d54 JK |
1066 | if (f2fs_proc_root) |
1067 | sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root); | |
1068 | ||
1069 | if (sbi->s_proc) | |
1070 | proc_create_data("segment_info", S_IRUGO, sbi->s_proc, | |
1071 | &f2fs_seq_segment_info_fops, sb); | |
1072 | ||
d3ee456d NJ |
1073 | if (test_opt(sbi, DISCARD)) { |
1074 | struct request_queue *q = bdev_get_queue(sb->s_bdev); | |
1075 | if (!blk_queue_discard(q)) | |
1076 | f2fs_msg(sb, KERN_WARNING, | |
1077 | "mounting with \"discard\" option, but " | |
1078 | "the device does not support discard"); | |
1079 | } | |
1080 | ||
b59d0bae NJ |
1081 | sbi->s_kobj.kset = f2fs_kset; |
1082 | init_completion(&sbi->s_kobj_unregister); | |
1083 | err = kobject_init_and_add(&sbi->s_kobj, &f2fs_ktype, NULL, | |
1084 | "%s", sb->s_id); | |
1085 | if (err) | |
6437d1b0 | 1086 | goto free_proc; |
b59d0bae | 1087 | |
b0c44f05 JK |
1088 | if (!retry) |
1089 | sbi->need_fsck = true; | |
1090 | ||
6437d1b0 JK |
1091 | /* recover fsynced data */ |
1092 | if (!test_opt(sbi, DISABLE_ROLL_FORWARD)) { | |
1093 | err = recover_fsync_data(sbi); | |
ed2e621a | 1094 | if (err) { |
6437d1b0 JK |
1095 | f2fs_msg(sb, KERN_ERR, |
1096 | "Cannot recover all fsync data errno=%ld", err); | |
ed2e621a JK |
1097 | goto free_kobj; |
1098 | } | |
6437d1b0 | 1099 | } |
b59d0bae | 1100 | |
6437d1b0 JK |
1101 | /* |
1102 | * If filesystem is not mounted as read-only then | |
1103 | * do start the gc_thread. | |
1104 | */ | |
6b2920a5 | 1105 | if (!f2fs_readonly(sb)) { |
6437d1b0 JK |
1106 | /* After POR, we can run background GC thread.*/ |
1107 | err = start_gc_thread(sbi); | |
1108 | if (err) | |
1109 | goto free_kobj; | |
1110 | } | |
aff063e2 | 1111 | return 0; |
6437d1b0 JK |
1112 | |
1113 | free_kobj: | |
1114 | kobject_del(&sbi->s_kobj); | |
1115 | free_proc: | |
1d15bd20 CY |
1116 | if (sbi->s_proc) { |
1117 | remove_proc_entry("segment_info", sbi->s_proc); | |
1118 | remove_proc_entry(sb->s_id, f2fs_proc_root); | |
1119 | } | |
1120 | f2fs_destroy_stats(sbi); | |
aff063e2 JK |
1121 | free_root_inode: |
1122 | dput(sb->s_root); | |
1123 | sb->s_root = NULL; | |
1124 | free_node_inode: | |
1125 | iput(sbi->node_inode); | |
1126 | free_nm: | |
1127 | destroy_node_manager(sbi); | |
1128 | free_sm: | |
1129 | destroy_segment_manager(sbi); | |
1130 | free_cp: | |
1131 | kfree(sbi->ckpt); | |
1132 | free_meta_inode: | |
1133 | make_bad_inode(sbi->meta_inode); | |
1134 | iput(sbi->meta_inode); | |
1135 | free_sb_buf: | |
1136 | brelse(raw_super_buf); | |
1137 | free_sbi: | |
1138 | kfree(sbi); | |
ed2e621a JK |
1139 | |
1140 | /* give only one another chance */ | |
1141 | if (retry) { | |
922cedbd | 1142 | retry = 0; |
ed2e621a JK |
1143 | shrink_dcache_sb(sb); |
1144 | goto try_onemore; | |
1145 | } | |
aff063e2 JK |
1146 | return err; |
1147 | } | |
1148 | ||
1149 | static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags, | |
1150 | const char *dev_name, void *data) | |
1151 | { | |
1152 | return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super); | |
1153 | } | |
1154 | ||
1155 | static struct file_system_type f2fs_fs_type = { | |
1156 | .owner = THIS_MODULE, | |
1157 | .name = "f2fs", | |
1158 | .mount = f2fs_mount, | |
1159 | .kill_sb = kill_block_super, | |
1160 | .fs_flags = FS_REQUIRES_DEV, | |
1161 | }; | |
7f78e035 | 1162 | MODULE_ALIAS_FS("f2fs"); |
aff063e2 | 1163 | |
6e6093a8 | 1164 | static int __init init_inodecache(void) |
aff063e2 JK |
1165 | { |
1166 | f2fs_inode_cachep = f2fs_kmem_cache_create("f2fs_inode_cache", | |
e8512d2e | 1167 | sizeof(struct f2fs_inode_info)); |
6bacf52f | 1168 | if (!f2fs_inode_cachep) |
aff063e2 JK |
1169 | return -ENOMEM; |
1170 | return 0; | |
1171 | } | |
1172 | ||
1173 | static void destroy_inodecache(void) | |
1174 | { | |
1175 | /* | |
1176 | * Make sure all delayed rcu free inodes are flushed before we | |
1177 | * destroy cache. | |
1178 | */ | |
1179 | rcu_barrier(); | |
1180 | kmem_cache_destroy(f2fs_inode_cachep); | |
1181 | } | |
1182 | ||
1183 | static int __init init_f2fs_fs(void) | |
1184 | { | |
1185 | int err; | |
1186 | ||
1187 | err = init_inodecache(); | |
1188 | if (err) | |
1189 | goto fail; | |
1190 | err = create_node_manager_caches(); | |
1191 | if (err) | |
9890ff3f | 1192 | goto free_inodecache; |
7fd9e544 | 1193 | err = create_segment_manager_caches(); |
aff063e2 | 1194 | if (err) |
9890ff3f | 1195 | goto free_node_manager_caches; |
7fd9e544 JK |
1196 | err = create_gc_caches(); |
1197 | if (err) | |
1198 | goto free_segment_manager_caches; | |
aff063e2 JK |
1199 | err = create_checkpoint_caches(); |
1200 | if (err) | |
9890ff3f | 1201 | goto free_gc_caches; |
b59d0bae | 1202 | f2fs_kset = kset_create_and_add("f2fs", NULL, fs_kobj); |
6e6b978c WY |
1203 | if (!f2fs_kset) { |
1204 | err = -ENOMEM; | |
9890ff3f | 1205 | goto free_checkpoint_caches; |
6e6b978c | 1206 | } |
4589d25d NJ |
1207 | err = register_filesystem(&f2fs_fs_type); |
1208 | if (err) | |
9890ff3f | 1209 | goto free_kset; |
4589d25d | 1210 | f2fs_create_root_stats(); |
5e176d54 | 1211 | f2fs_proc_root = proc_mkdir("fs/f2fs", NULL); |
9890ff3f ZH |
1212 | return 0; |
1213 | ||
1214 | free_kset: | |
1215 | kset_unregister(f2fs_kset); | |
1216 | free_checkpoint_caches: | |
1217 | destroy_checkpoint_caches(); | |
1218 | free_gc_caches: | |
1219 | destroy_gc_caches(); | |
7fd9e544 JK |
1220 | free_segment_manager_caches: |
1221 | destroy_segment_manager_caches(); | |
9890ff3f ZH |
1222 | free_node_manager_caches: |
1223 | destroy_node_manager_caches(); | |
1224 | free_inodecache: | |
1225 | destroy_inodecache(); | |
aff063e2 JK |
1226 | fail: |
1227 | return err; | |
1228 | } | |
1229 | ||
1230 | static void __exit exit_f2fs_fs(void) | |
1231 | { | |
5e176d54 | 1232 | remove_proc_entry("fs/f2fs", NULL); |
4589d25d | 1233 | f2fs_destroy_root_stats(); |
aff063e2 JK |
1234 | unregister_filesystem(&f2fs_fs_type); |
1235 | destroy_checkpoint_caches(); | |
1236 | destroy_gc_caches(); | |
5dcd8a71 | 1237 | destroy_segment_manager_caches(); |
aff063e2 JK |
1238 | destroy_node_manager_caches(); |
1239 | destroy_inodecache(); | |
b59d0bae | 1240 | kset_unregister(f2fs_kset); |
aff063e2 JK |
1241 | } |
1242 | ||
1243 | module_init(init_f2fs_fs) | |
1244 | module_exit(exit_f2fs_fs) | |
1245 | ||
1246 | MODULE_AUTHOR("Samsung Electronics's Praesto Team"); | |
1247 | MODULE_DESCRIPTION("Flash Friendly File System"); | |
1248 | MODULE_LICENSE("GPL"); |