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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" |
db9f7c1a | 33 | #include "trace.h" |
aff063e2 | 34 | |
a2a4a7e4 NJ |
35 | #define CREATE_TRACE_POINTS |
36 | #include <trace/events/f2fs.h> | |
37 | ||
5e176d54 | 38 | static struct proc_dir_entry *f2fs_proc_root; |
aff063e2 | 39 | static struct kmem_cache *f2fs_inode_cachep; |
b59d0bae | 40 | static struct kset *f2fs_kset; |
aff063e2 JK |
41 | |
42 | enum { | |
696c018c | 43 | Opt_gc_background, |
aff063e2 | 44 | Opt_disable_roll_forward, |
2d834bf9 | 45 | Opt_norecovery, |
aff063e2 JK |
46 | Opt_discard, |
47 | Opt_noheap, | |
4058c511 | 48 | Opt_user_xattr, |
aff063e2 | 49 | Opt_nouser_xattr, |
4058c511 | 50 | Opt_acl, |
aff063e2 JK |
51 | Opt_noacl, |
52 | Opt_active_logs, | |
53 | Opt_disable_ext_identify, | |
444c580f | 54 | Opt_inline_xattr, |
8274de77 | 55 | Opt_inline_data, |
5efd3c6f | 56 | Opt_inline_dentry, |
6b4afdd7 | 57 | Opt_flush_merge, |
0f7b2abd | 58 | Opt_nobarrier, |
d5053a34 | 59 | Opt_fastboot, |
aff063e2 JK |
60 | Opt_err, |
61 | }; | |
62 | ||
63 | static match_table_t f2fs_tokens = { | |
696c018c | 64 | {Opt_gc_background, "background_gc=%s"}, |
aff063e2 | 65 | {Opt_disable_roll_forward, "disable_roll_forward"}, |
2d834bf9 | 66 | {Opt_norecovery, "norecovery"}, |
aff063e2 JK |
67 | {Opt_discard, "discard"}, |
68 | {Opt_noheap, "no_heap"}, | |
4058c511 | 69 | {Opt_user_xattr, "user_xattr"}, |
aff063e2 | 70 | {Opt_nouser_xattr, "nouser_xattr"}, |
4058c511 | 71 | {Opt_acl, "acl"}, |
aff063e2 JK |
72 | {Opt_noacl, "noacl"}, |
73 | {Opt_active_logs, "active_logs=%u"}, | |
74 | {Opt_disable_ext_identify, "disable_ext_identify"}, | |
444c580f | 75 | {Opt_inline_xattr, "inline_xattr"}, |
8274de77 | 76 | {Opt_inline_data, "inline_data"}, |
5efd3c6f | 77 | {Opt_inline_dentry, "inline_dentry"}, |
6b4afdd7 | 78 | {Opt_flush_merge, "flush_merge"}, |
0f7b2abd | 79 | {Opt_nobarrier, "nobarrier"}, |
d5053a34 | 80 | {Opt_fastboot, "fastboot"}, |
aff063e2 JK |
81 | {Opt_err, NULL}, |
82 | }; | |
83 | ||
b59d0bae | 84 | /* Sysfs support for f2fs */ |
ea91e9b0 JK |
85 | enum { |
86 | GC_THREAD, /* struct f2fs_gc_thread */ | |
87 | SM_INFO, /* struct f2fs_sm_info */ | |
cdfc41c1 | 88 | NM_INFO, /* struct f2fs_nm_info */ |
b1c57c1c | 89 | F2FS_SBI, /* struct f2fs_sb_info */ |
ea91e9b0 JK |
90 | }; |
91 | ||
b59d0bae NJ |
92 | struct f2fs_attr { |
93 | struct attribute attr; | |
94 | ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *); | |
95 | ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *, | |
96 | const char *, size_t); | |
ea91e9b0 | 97 | int struct_type; |
b59d0bae NJ |
98 | int offset; |
99 | }; | |
100 | ||
ea91e9b0 JK |
101 | static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type) |
102 | { | |
103 | if (struct_type == GC_THREAD) | |
104 | return (unsigned char *)sbi->gc_thread; | |
105 | else if (struct_type == SM_INFO) | |
106 | return (unsigned char *)SM_I(sbi); | |
cdfc41c1 JK |
107 | else if (struct_type == NM_INFO) |
108 | return (unsigned char *)NM_I(sbi); | |
b1c57c1c JK |
109 | else if (struct_type == F2FS_SBI) |
110 | return (unsigned char *)sbi; | |
ea91e9b0 JK |
111 | return NULL; |
112 | } | |
113 | ||
b59d0bae NJ |
114 | static ssize_t f2fs_sbi_show(struct f2fs_attr *a, |
115 | struct f2fs_sb_info *sbi, char *buf) | |
116 | { | |
ea91e9b0 | 117 | unsigned char *ptr = NULL; |
b59d0bae NJ |
118 | unsigned int *ui; |
119 | ||
ea91e9b0 JK |
120 | ptr = __struct_ptr(sbi, a->struct_type); |
121 | if (!ptr) | |
b59d0bae NJ |
122 | return -EINVAL; |
123 | ||
ea91e9b0 | 124 | ui = (unsigned int *)(ptr + a->offset); |
b59d0bae NJ |
125 | |
126 | return snprintf(buf, PAGE_SIZE, "%u\n", *ui); | |
127 | } | |
128 | ||
129 | static ssize_t f2fs_sbi_store(struct f2fs_attr *a, | |
130 | struct f2fs_sb_info *sbi, | |
131 | const char *buf, size_t count) | |
132 | { | |
ea91e9b0 | 133 | unsigned char *ptr; |
b59d0bae NJ |
134 | unsigned long t; |
135 | unsigned int *ui; | |
136 | ssize_t ret; | |
137 | ||
ea91e9b0 JK |
138 | ptr = __struct_ptr(sbi, a->struct_type); |
139 | if (!ptr) | |
b59d0bae NJ |
140 | return -EINVAL; |
141 | ||
ea91e9b0 | 142 | ui = (unsigned int *)(ptr + a->offset); |
b59d0bae NJ |
143 | |
144 | ret = kstrtoul(skip_spaces(buf), 0, &t); | |
145 | if (ret < 0) | |
146 | return ret; | |
147 | *ui = t; | |
148 | return count; | |
149 | } | |
150 | ||
151 | static ssize_t f2fs_attr_show(struct kobject *kobj, | |
152 | struct attribute *attr, char *buf) | |
153 | { | |
154 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, | |
155 | s_kobj); | |
156 | struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); | |
157 | ||
158 | return a->show ? a->show(a, sbi, buf) : 0; | |
159 | } | |
160 | ||
161 | static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr, | |
162 | const char *buf, size_t len) | |
163 | { | |
164 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, | |
165 | s_kobj); | |
166 | struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); | |
167 | ||
168 | return a->store ? a->store(a, sbi, buf, len) : 0; | |
169 | } | |
170 | ||
171 | static void f2fs_sb_release(struct kobject *kobj) | |
172 | { | |
173 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, | |
174 | s_kobj); | |
175 | complete(&sbi->s_kobj_unregister); | |
176 | } | |
177 | ||
ea91e9b0 | 178 | #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \ |
b59d0bae NJ |
179 | static struct f2fs_attr f2fs_attr_##_name = { \ |
180 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
181 | .show = _show, \ | |
182 | .store = _store, \ | |
ea91e9b0 JK |
183 | .struct_type = _struct_type, \ |
184 | .offset = _offset \ | |
b59d0bae NJ |
185 | } |
186 | ||
ea91e9b0 JK |
187 | #define F2FS_RW_ATTR(struct_type, struct_name, name, elname) \ |
188 | F2FS_ATTR_OFFSET(struct_type, name, 0644, \ | |
189 | f2fs_sbi_show, f2fs_sbi_store, \ | |
190 | offsetof(struct struct_name, elname)) | |
b59d0bae | 191 | |
ea91e9b0 JK |
192 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time); |
193 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time); | |
194 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time); | |
195 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_idle, gc_idle); | |
196 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments); | |
7ac8c3b0 | 197 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, max_small_discards, max_discards); |
216fbd64 JK |
198 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy); |
199 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util); | |
c1ce1b02 | 200 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks); |
cdfc41c1 | 201 | F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh); |
b1c57c1c | 202 | F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search); |
ab9fa662 | 203 | F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level); |
b59d0bae NJ |
204 | |
205 | #define ATTR_LIST(name) (&f2fs_attr_##name.attr) | |
206 | static struct attribute *f2fs_attrs[] = { | |
207 | ATTR_LIST(gc_min_sleep_time), | |
208 | ATTR_LIST(gc_max_sleep_time), | |
209 | ATTR_LIST(gc_no_gc_sleep_time), | |
d2dc095f | 210 | ATTR_LIST(gc_idle), |
ea91e9b0 | 211 | ATTR_LIST(reclaim_segments), |
7ac8c3b0 | 212 | ATTR_LIST(max_small_discards), |
216fbd64 JK |
213 | ATTR_LIST(ipu_policy), |
214 | ATTR_LIST(min_ipu_util), | |
c1ce1b02 | 215 | ATTR_LIST(min_fsync_blocks), |
b1c57c1c | 216 | ATTR_LIST(max_victim_search), |
ab9fa662 | 217 | ATTR_LIST(dir_level), |
cdfc41c1 | 218 | ATTR_LIST(ram_thresh), |
b59d0bae NJ |
219 | NULL, |
220 | }; | |
221 | ||
222 | static const struct sysfs_ops f2fs_attr_ops = { | |
223 | .show = f2fs_attr_show, | |
224 | .store = f2fs_attr_store, | |
225 | }; | |
226 | ||
227 | static struct kobj_type f2fs_ktype = { | |
228 | .default_attrs = f2fs_attrs, | |
229 | .sysfs_ops = &f2fs_attr_ops, | |
230 | .release = f2fs_sb_release, | |
231 | }; | |
232 | ||
a07ef784 NJ |
233 | void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...) |
234 | { | |
235 | struct va_format vaf; | |
236 | va_list args; | |
237 | ||
238 | va_start(args, fmt); | |
239 | vaf.fmt = fmt; | |
240 | vaf.va = &args; | |
241 | printk("%sF2FS-fs (%s): %pV\n", level, sb->s_id, &vaf); | |
242 | va_end(args); | |
243 | } | |
244 | ||
aff063e2 JK |
245 | static void init_once(void *foo) |
246 | { | |
247 | struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo; | |
248 | ||
aff063e2 JK |
249 | inode_init_once(&fi->vfs_inode); |
250 | } | |
251 | ||
696c018c NJ |
252 | static int parse_options(struct super_block *sb, char *options) |
253 | { | |
254 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
255 | substring_t args[MAX_OPT_ARGS]; | |
256 | char *p, *name; | |
257 | int arg = 0; | |
258 | ||
259 | if (!options) | |
260 | return 0; | |
261 | ||
262 | while ((p = strsep(&options, ",")) != NULL) { | |
263 | int token; | |
264 | if (!*p) | |
265 | continue; | |
266 | /* | |
267 | * Initialize args struct so we know whether arg was | |
268 | * found; some options take optional arguments. | |
269 | */ | |
270 | args[0].to = args[0].from = NULL; | |
271 | token = match_token(p, f2fs_tokens, args); | |
272 | ||
273 | switch (token) { | |
274 | case Opt_gc_background: | |
275 | name = match_strdup(&args[0]); | |
276 | ||
277 | if (!name) | |
278 | return -ENOMEM; | |
04c09388 | 279 | if (strlen(name) == 2 && !strncmp(name, "on", 2)) |
696c018c | 280 | set_opt(sbi, BG_GC); |
04c09388 | 281 | else if (strlen(name) == 3 && !strncmp(name, "off", 3)) |
696c018c NJ |
282 | clear_opt(sbi, BG_GC); |
283 | else { | |
284 | kfree(name); | |
285 | return -EINVAL; | |
286 | } | |
287 | kfree(name); | |
288 | break; | |
289 | case Opt_disable_roll_forward: | |
290 | set_opt(sbi, DISABLE_ROLL_FORWARD); | |
291 | break; | |
2d834bf9 JK |
292 | case Opt_norecovery: |
293 | /* this option mounts f2fs with ro */ | |
294 | set_opt(sbi, DISABLE_ROLL_FORWARD); | |
295 | if (!f2fs_readonly(sb)) | |
296 | return -EINVAL; | |
297 | break; | |
696c018c NJ |
298 | case Opt_discard: |
299 | set_opt(sbi, DISCARD); | |
300 | break; | |
301 | case Opt_noheap: | |
302 | set_opt(sbi, NOHEAP); | |
303 | break; | |
304 | #ifdef CONFIG_F2FS_FS_XATTR | |
4058c511 KA |
305 | case Opt_user_xattr: |
306 | set_opt(sbi, XATTR_USER); | |
307 | break; | |
696c018c NJ |
308 | case Opt_nouser_xattr: |
309 | clear_opt(sbi, XATTR_USER); | |
310 | break; | |
444c580f JK |
311 | case Opt_inline_xattr: |
312 | set_opt(sbi, INLINE_XATTR); | |
313 | break; | |
696c018c | 314 | #else |
4058c511 KA |
315 | case Opt_user_xattr: |
316 | f2fs_msg(sb, KERN_INFO, | |
317 | "user_xattr options not supported"); | |
318 | break; | |
696c018c NJ |
319 | case Opt_nouser_xattr: |
320 | f2fs_msg(sb, KERN_INFO, | |
321 | "nouser_xattr options not supported"); | |
322 | break; | |
444c580f JK |
323 | case Opt_inline_xattr: |
324 | f2fs_msg(sb, KERN_INFO, | |
325 | "inline_xattr options not supported"); | |
326 | break; | |
696c018c NJ |
327 | #endif |
328 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
4058c511 KA |
329 | case Opt_acl: |
330 | set_opt(sbi, POSIX_ACL); | |
331 | break; | |
696c018c NJ |
332 | case Opt_noacl: |
333 | clear_opt(sbi, POSIX_ACL); | |
334 | break; | |
335 | #else | |
4058c511 KA |
336 | case Opt_acl: |
337 | f2fs_msg(sb, KERN_INFO, "acl options not supported"); | |
338 | break; | |
696c018c NJ |
339 | case Opt_noacl: |
340 | f2fs_msg(sb, KERN_INFO, "noacl options not supported"); | |
341 | break; | |
342 | #endif | |
343 | case Opt_active_logs: | |
344 | if (args->from && match_int(args, &arg)) | |
345 | return -EINVAL; | |
346 | if (arg != 2 && arg != 4 && arg != NR_CURSEG_TYPE) | |
347 | return -EINVAL; | |
348 | sbi->active_logs = arg; | |
349 | break; | |
350 | case Opt_disable_ext_identify: | |
351 | set_opt(sbi, DISABLE_EXT_IDENTIFY); | |
352 | break; | |
8274de77 HL |
353 | case Opt_inline_data: |
354 | set_opt(sbi, INLINE_DATA); | |
355 | break; | |
5efd3c6f CY |
356 | case Opt_inline_dentry: |
357 | set_opt(sbi, INLINE_DENTRY); | |
358 | break; | |
6b4afdd7 JK |
359 | case Opt_flush_merge: |
360 | set_opt(sbi, FLUSH_MERGE); | |
361 | break; | |
0f7b2abd JK |
362 | case Opt_nobarrier: |
363 | set_opt(sbi, NOBARRIER); | |
364 | break; | |
d5053a34 JK |
365 | case Opt_fastboot: |
366 | set_opt(sbi, FASTBOOT); | |
367 | break; | |
696c018c NJ |
368 | default: |
369 | f2fs_msg(sb, KERN_ERR, | |
370 | "Unrecognized mount option \"%s\" or missing value", | |
371 | p); | |
372 | return -EINVAL; | |
373 | } | |
374 | } | |
375 | return 0; | |
376 | } | |
377 | ||
aff063e2 JK |
378 | static struct inode *f2fs_alloc_inode(struct super_block *sb) |
379 | { | |
380 | struct f2fs_inode_info *fi; | |
381 | ||
a0acdfe0 | 382 | fi = kmem_cache_alloc(f2fs_inode_cachep, GFP_F2FS_ZERO); |
aff063e2 JK |
383 | if (!fi) |
384 | return NULL; | |
385 | ||
386 | init_once((void *) fi); | |
387 | ||
434720fa | 388 | /* Initialize f2fs-specific inode info */ |
aff063e2 | 389 | fi->vfs_inode.i_version = 1; |
a7ffdbe2 | 390 | atomic_set(&fi->dirty_pages, 0); |
aff063e2 JK |
391 | fi->i_current_depth = 1; |
392 | fi->i_advise = 0; | |
393 | rwlock_init(&fi->ext.ext_lock); | |
d928bfbf | 394 | init_rwsem(&fi->i_sem); |
34ba94ba | 395 | INIT_RADIX_TREE(&fi->inmem_root, GFP_NOFS); |
88b88a66 JK |
396 | INIT_LIST_HEAD(&fi->inmem_pages); |
397 | mutex_init(&fi->inmem_lock); | |
aff063e2 JK |
398 | |
399 | set_inode_flag(fi, FI_NEW_INODE); | |
400 | ||
444c580f JK |
401 | if (test_opt(F2FS_SB(sb), INLINE_XATTR)) |
402 | set_inode_flag(fi, FI_INLINE_XATTR); | |
403 | ||
ab9fa662 JK |
404 | /* Will be used by directory only */ |
405 | fi->i_dir_level = F2FS_SB(sb)->dir_level; | |
406 | ||
aff063e2 JK |
407 | return &fi->vfs_inode; |
408 | } | |
409 | ||
531ad7d5 JK |
410 | static int f2fs_drop_inode(struct inode *inode) |
411 | { | |
412 | /* | |
413 | * This is to avoid a deadlock condition like below. | |
414 | * writeback_single_inode(inode) | |
415 | * - f2fs_write_data_page | |
416 | * - f2fs_gc -> iput -> evict | |
417 | * - inode_wait_for_writeback(inode) | |
418 | */ | |
419 | if (!inode_unhashed(inode) && inode->i_state & I_SYNC) | |
420 | return 0; | |
421 | return generic_drop_inode(inode); | |
422 | } | |
423 | ||
b3783873 JK |
424 | /* |
425 | * f2fs_dirty_inode() is called from __mark_inode_dirty() | |
426 | * | |
427 | * We should call set_dirty_inode to write the dirty inode through write_inode. | |
428 | */ | |
429 | static void f2fs_dirty_inode(struct inode *inode, int flags) | |
430 | { | |
431 | set_inode_flag(F2FS_I(inode), FI_DIRTY_INODE); | |
b3783873 JK |
432 | } |
433 | ||
aff063e2 JK |
434 | static void f2fs_i_callback(struct rcu_head *head) |
435 | { | |
436 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
437 | kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode)); | |
438 | } | |
439 | ||
25ca923b | 440 | static void f2fs_destroy_inode(struct inode *inode) |
aff063e2 JK |
441 | { |
442 | call_rcu(&inode->i_rcu, f2fs_i_callback); | |
443 | } | |
444 | ||
445 | static void f2fs_put_super(struct super_block *sb) | |
446 | { | |
447 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
448 | ||
5e176d54 JK |
449 | if (sbi->s_proc) { |
450 | remove_proc_entry("segment_info", sbi->s_proc); | |
451 | remove_proc_entry(sb->s_id, f2fs_proc_root); | |
452 | } | |
b59d0bae | 453 | kobject_del(&sbi->s_kobj); |
5e176d54 | 454 | |
aff063e2 JK |
455 | f2fs_destroy_stats(sbi); |
456 | stop_gc_thread(sbi); | |
457 | ||
85dc2f2c JK |
458 | /* |
459 | * We don't need to do checkpoint when superblock is clean. | |
460 | * But, the previous checkpoint was not done by umount, it needs to do | |
461 | * clean checkpoint again. | |
462 | */ | |
caf0047e | 463 | if (is_sbi_flag_set(sbi, SBI_IS_DIRTY) || |
85dc2f2c | 464 | !is_set_ckpt_flags(F2FS_CKPT(sbi), CP_UMOUNT_FLAG)) { |
75ab4cb8 JK |
465 | struct cp_control cpc = { |
466 | .reason = CP_UMOUNT, | |
467 | }; | |
468 | write_checkpoint(sbi, &cpc); | |
469 | } | |
aff063e2 | 470 | |
cf779cab JK |
471 | /* |
472 | * normally superblock is clean, so we need to release this. | |
473 | * In addition, EIO will skip do checkpoint, we need this as well. | |
474 | */ | |
6f12ac25 | 475 | release_dirty_inode(sbi); |
4b2fecc8 | 476 | release_discard_addrs(sbi); |
6f12ac25 | 477 | |
aff063e2 JK |
478 | iput(sbi->node_inode); |
479 | iput(sbi->meta_inode); | |
480 | ||
481 | /* destroy f2fs internal modules */ | |
482 | destroy_node_manager(sbi); | |
483 | destroy_segment_manager(sbi); | |
484 | ||
485 | kfree(sbi->ckpt); | |
b59d0bae NJ |
486 | kobject_put(&sbi->s_kobj); |
487 | wait_for_completion(&sbi->s_kobj_unregister); | |
aff063e2 JK |
488 | |
489 | sb->s_fs_info = NULL; | |
490 | brelse(sbi->raw_super_buf); | |
491 | kfree(sbi); | |
492 | } | |
493 | ||
494 | int f2fs_sync_fs(struct super_block *sb, int sync) | |
495 | { | |
496 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
aff063e2 | 497 | |
a2a4a7e4 NJ |
498 | trace_f2fs_sync_fs(sb, sync); |
499 | ||
b7473754 | 500 | if (sync) { |
d5053a34 JK |
501 | struct cp_control cpc; |
502 | ||
119ee914 JK |
503 | cpc.reason = __get_cp_reason(sbi); |
504 | ||
b7473754 | 505 | mutex_lock(&sbi->gc_mutex); |
75ab4cb8 | 506 | write_checkpoint(sbi, &cpc); |
b7473754 JK |
507 | mutex_unlock(&sbi->gc_mutex); |
508 | } else { | |
7d82db83 | 509 | f2fs_balance_fs(sbi); |
b7473754 | 510 | } |
db9f7c1a | 511 | f2fs_trace_ios(NULL, NULL, 1); |
aff063e2 | 512 | |
64c576fe | 513 | return 0; |
aff063e2 JK |
514 | } |
515 | ||
d6212a5f CL |
516 | static int f2fs_freeze(struct super_block *sb) |
517 | { | |
518 | int err; | |
519 | ||
77888c1e | 520 | if (f2fs_readonly(sb)) |
d6212a5f CL |
521 | return 0; |
522 | ||
523 | err = f2fs_sync_fs(sb, 1); | |
524 | return err; | |
525 | } | |
526 | ||
527 | static int f2fs_unfreeze(struct super_block *sb) | |
528 | { | |
529 | return 0; | |
530 | } | |
531 | ||
aff063e2 JK |
532 | static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf) |
533 | { | |
534 | struct super_block *sb = dentry->d_sb; | |
535 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
536 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); | |
537 | block_t total_count, user_block_count, start_count, ovp_count; | |
538 | ||
539 | total_count = le64_to_cpu(sbi->raw_super->block_count); | |
540 | user_block_count = sbi->user_block_count; | |
541 | start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr); | |
542 | ovp_count = SM_I(sbi)->ovp_segments << sbi->log_blocks_per_seg; | |
543 | buf->f_type = F2FS_SUPER_MAGIC; | |
544 | buf->f_bsize = sbi->blocksize; | |
545 | ||
546 | buf->f_blocks = total_count - start_count; | |
547 | buf->f_bfree = buf->f_blocks - valid_user_blocks(sbi) - ovp_count; | |
548 | buf->f_bavail = user_block_count - valid_user_blocks(sbi); | |
549 | ||
c200b1aa CY |
550 | buf->f_files = sbi->total_node_count - F2FS_RESERVED_NODE_NUM; |
551 | buf->f_ffree = buf->f_files - valid_inode_count(sbi); | |
aff063e2 | 552 | |
5a20d339 | 553 | buf->f_namelen = F2FS_NAME_LEN; |
aff063e2 JK |
554 | buf->f_fsid.val[0] = (u32)id; |
555 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
556 | ||
557 | return 0; | |
558 | } | |
559 | ||
560 | static int f2fs_show_options(struct seq_file *seq, struct dentry *root) | |
561 | { | |
562 | struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb); | |
563 | ||
b270ad6f | 564 | if (!f2fs_readonly(sbi->sb) && test_opt(sbi, BG_GC)) |
696c018c | 565 | seq_printf(seq, ",background_gc=%s", "on"); |
aff063e2 | 566 | else |
696c018c | 567 | seq_printf(seq, ",background_gc=%s", "off"); |
aff063e2 JK |
568 | if (test_opt(sbi, DISABLE_ROLL_FORWARD)) |
569 | seq_puts(seq, ",disable_roll_forward"); | |
570 | if (test_opt(sbi, DISCARD)) | |
571 | seq_puts(seq, ",discard"); | |
572 | if (test_opt(sbi, NOHEAP)) | |
573 | seq_puts(seq, ",no_heap_alloc"); | |
574 | #ifdef CONFIG_F2FS_FS_XATTR | |
575 | if (test_opt(sbi, XATTR_USER)) | |
576 | seq_puts(seq, ",user_xattr"); | |
577 | else | |
578 | seq_puts(seq, ",nouser_xattr"); | |
444c580f JK |
579 | if (test_opt(sbi, INLINE_XATTR)) |
580 | seq_puts(seq, ",inline_xattr"); | |
aff063e2 JK |
581 | #endif |
582 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
583 | if (test_opt(sbi, POSIX_ACL)) | |
584 | seq_puts(seq, ",acl"); | |
585 | else | |
586 | seq_puts(seq, ",noacl"); | |
587 | #endif | |
588 | if (test_opt(sbi, DISABLE_EXT_IDENTIFY)) | |
aa43507f | 589 | seq_puts(seq, ",disable_ext_identify"); |
8274de77 HL |
590 | if (test_opt(sbi, INLINE_DATA)) |
591 | seq_puts(seq, ",inline_data"); | |
5efd3c6f CY |
592 | if (test_opt(sbi, INLINE_DENTRY)) |
593 | seq_puts(seq, ",inline_dentry"); | |
b270ad6f | 594 | if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE)) |
6b4afdd7 | 595 | seq_puts(seq, ",flush_merge"); |
0f7b2abd JK |
596 | if (test_opt(sbi, NOBARRIER)) |
597 | seq_puts(seq, ",nobarrier"); | |
d5053a34 JK |
598 | if (test_opt(sbi, FASTBOOT)) |
599 | seq_puts(seq, ",fastboot"); | |
aff063e2 JK |
600 | seq_printf(seq, ",active_logs=%u", sbi->active_logs); |
601 | ||
602 | return 0; | |
603 | } | |
604 | ||
5e176d54 JK |
605 | static int segment_info_seq_show(struct seq_file *seq, void *offset) |
606 | { | |
607 | struct super_block *sb = seq->private; | |
608 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
6c311ec6 CF |
609 | unsigned int total_segs = |
610 | le32_to_cpu(sbi->raw_super->segment_count_main); | |
5e176d54 JK |
611 | int i; |
612 | ||
90aa6dc9 CY |
613 | seq_puts(seq, "format: segment_type|valid_blocks\n" |
614 | "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n"); | |
615 | ||
5e176d54 | 616 | for (i = 0; i < total_segs; i++) { |
90aa6dc9 CY |
617 | struct seg_entry *se = get_seg_entry(sbi, i); |
618 | ||
619 | if ((i % 10) == 0) | |
620 | seq_printf(seq, "%-5d", i); | |
621 | seq_printf(seq, "%d|%-3u", se->type, | |
622 | get_valid_blocks(sbi, i, 1)); | |
46c04366 GZ |
623 | if ((i % 10) == 9 || i == (total_segs - 1)) |
624 | seq_putc(seq, '\n'); | |
5e176d54 | 625 | else |
46c04366 | 626 | seq_putc(seq, ' '); |
5e176d54 | 627 | } |
46c04366 | 628 | |
5e176d54 JK |
629 | return 0; |
630 | } | |
631 | ||
632 | static int segment_info_open_fs(struct inode *inode, struct file *file) | |
633 | { | |
634 | return single_open(file, segment_info_seq_show, PDE_DATA(inode)); | |
635 | } | |
636 | ||
637 | static const struct file_operations f2fs_seq_segment_info_fops = { | |
638 | .owner = THIS_MODULE, | |
639 | .open = segment_info_open_fs, | |
640 | .read = seq_read, | |
641 | .llseek = seq_lseek, | |
642 | .release = single_release, | |
643 | }; | |
644 | ||
696c018c NJ |
645 | static int f2fs_remount(struct super_block *sb, int *flags, char *data) |
646 | { | |
647 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
648 | struct f2fs_mount_info org_mount_opt; | |
649 | int err, active_logs; | |
876dc59e GZ |
650 | bool need_restart_gc = false; |
651 | bool need_stop_gc = false; | |
696c018c | 652 | |
02b9984d TT |
653 | sync_filesystem(sb); |
654 | ||
696c018c NJ |
655 | /* |
656 | * Save the old mount options in case we | |
657 | * need to restore them. | |
658 | */ | |
659 | org_mount_opt = sbi->mount_opt; | |
660 | active_logs = sbi->active_logs; | |
661 | ||
26666c8a CY |
662 | sbi->mount_opt.opt = 0; |
663 | sbi->active_logs = NR_CURSEG_TYPE; | |
664 | ||
696c018c NJ |
665 | /* parse mount options */ |
666 | err = parse_options(sb, data); | |
667 | if (err) | |
668 | goto restore_opts; | |
669 | ||
670 | /* | |
671 | * Previous and new state of filesystem is RO, | |
876dc59e | 672 | * so skip checking GC and FLUSH_MERGE conditions. |
696c018c | 673 | */ |
6b2920a5 | 674 | if (f2fs_readonly(sb) && (*flags & MS_RDONLY)) |
696c018c NJ |
675 | goto skip; |
676 | ||
677 | /* | |
678 | * We stop the GC thread if FS is mounted as RO | |
679 | * or if background_gc = off is passed in mount | |
680 | * option. Also sync the filesystem. | |
681 | */ | |
682 | if ((*flags & MS_RDONLY) || !test_opt(sbi, BG_GC)) { | |
683 | if (sbi->gc_thread) { | |
684 | stop_gc_thread(sbi); | |
685 | f2fs_sync_fs(sb, 1); | |
876dc59e | 686 | need_restart_gc = true; |
696c018c | 687 | } |
aba291b3 | 688 | } else if (!sbi->gc_thread) { |
696c018c NJ |
689 | err = start_gc_thread(sbi); |
690 | if (err) | |
691 | goto restore_opts; | |
876dc59e GZ |
692 | need_stop_gc = true; |
693 | } | |
694 | ||
695 | /* | |
696 | * We stop issue flush thread if FS is mounted as RO | |
697 | * or if flush_merge is not passed in mount option. | |
698 | */ | |
699 | if ((*flags & MS_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) { | |
2163d198 | 700 | destroy_flush_cmd_control(sbi); |
aba291b3 | 701 | } else if (!SM_I(sbi)->cmd_control_info) { |
2163d198 GZ |
702 | err = create_flush_cmd_control(sbi); |
703 | if (err) | |
a688b9d9 | 704 | goto restore_gc; |
696c018c NJ |
705 | } |
706 | skip: | |
707 | /* Update the POSIXACL Flag */ | |
708 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
709 | (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0); | |
710 | return 0; | |
876dc59e GZ |
711 | restore_gc: |
712 | if (need_restart_gc) { | |
713 | if (start_gc_thread(sbi)) | |
714 | f2fs_msg(sbi->sb, KERN_WARNING, | |
e1c42045 | 715 | "background gc thread has stopped"); |
876dc59e GZ |
716 | } else if (need_stop_gc) { |
717 | stop_gc_thread(sbi); | |
718 | } | |
696c018c NJ |
719 | restore_opts: |
720 | sbi->mount_opt = org_mount_opt; | |
721 | sbi->active_logs = active_logs; | |
722 | return err; | |
723 | } | |
724 | ||
aff063e2 JK |
725 | static struct super_operations f2fs_sops = { |
726 | .alloc_inode = f2fs_alloc_inode, | |
531ad7d5 | 727 | .drop_inode = f2fs_drop_inode, |
aff063e2 JK |
728 | .destroy_inode = f2fs_destroy_inode, |
729 | .write_inode = f2fs_write_inode, | |
b3783873 | 730 | .dirty_inode = f2fs_dirty_inode, |
aff063e2 JK |
731 | .show_options = f2fs_show_options, |
732 | .evict_inode = f2fs_evict_inode, | |
733 | .put_super = f2fs_put_super, | |
734 | .sync_fs = f2fs_sync_fs, | |
d6212a5f CL |
735 | .freeze_fs = f2fs_freeze, |
736 | .unfreeze_fs = f2fs_unfreeze, | |
aff063e2 | 737 | .statfs = f2fs_statfs, |
696c018c | 738 | .remount_fs = f2fs_remount, |
aff063e2 JK |
739 | }; |
740 | ||
741 | static struct inode *f2fs_nfs_get_inode(struct super_block *sb, | |
742 | u64 ino, u32 generation) | |
743 | { | |
744 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
745 | struct inode *inode; | |
746 | ||
d6b7d4b3 | 747 | if (check_nid_range(sbi, ino)) |
910bb12d | 748 | return ERR_PTR(-ESTALE); |
aff063e2 JK |
749 | |
750 | /* | |
751 | * f2fs_iget isn't quite right if the inode is currently unallocated! | |
752 | * However f2fs_iget currently does appropriate checks to handle stale | |
753 | * inodes so everything is OK. | |
754 | */ | |
755 | inode = f2fs_iget(sb, ino); | |
756 | if (IS_ERR(inode)) | |
757 | return ERR_CAST(inode); | |
6bacf52f | 758 | if (unlikely(generation && inode->i_generation != generation)) { |
aff063e2 JK |
759 | /* we didn't find the right inode.. */ |
760 | iput(inode); | |
761 | return ERR_PTR(-ESTALE); | |
762 | } | |
763 | return inode; | |
764 | } | |
765 | ||
766 | static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
767 | int fh_len, int fh_type) | |
768 | { | |
769 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
770 | f2fs_nfs_get_inode); | |
771 | } | |
772 | ||
773 | static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid, | |
774 | int fh_len, int fh_type) | |
775 | { | |
776 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
777 | f2fs_nfs_get_inode); | |
778 | } | |
779 | ||
780 | static const struct export_operations f2fs_export_ops = { | |
781 | .fh_to_dentry = f2fs_fh_to_dentry, | |
782 | .fh_to_parent = f2fs_fh_to_parent, | |
783 | .get_parent = f2fs_get_parent, | |
784 | }; | |
785 | ||
aff063e2 JK |
786 | static loff_t max_file_size(unsigned bits) |
787 | { | |
de93653f | 788 | loff_t result = (DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS); |
aff063e2 JK |
789 | loff_t leaf_count = ADDRS_PER_BLOCK; |
790 | ||
791 | /* two direct node blocks */ | |
792 | result += (leaf_count * 2); | |
793 | ||
794 | /* two indirect node blocks */ | |
795 | leaf_count *= NIDS_PER_BLOCK; | |
796 | result += (leaf_count * 2); | |
797 | ||
798 | /* one double indirect node block */ | |
799 | leaf_count *= NIDS_PER_BLOCK; | |
800 | result += leaf_count; | |
801 | ||
802 | result <<= bits; | |
803 | return result; | |
804 | } | |
805 | ||
a07ef784 NJ |
806 | static int sanity_check_raw_super(struct super_block *sb, |
807 | struct f2fs_super_block *raw_super) | |
aff063e2 JK |
808 | { |
809 | unsigned int blocksize; | |
810 | ||
a07ef784 NJ |
811 | if (F2FS_SUPER_MAGIC != le32_to_cpu(raw_super->magic)) { |
812 | f2fs_msg(sb, KERN_INFO, | |
813 | "Magic Mismatch, valid(0x%x) - read(0x%x)", | |
814 | F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic)); | |
aff063e2 | 815 | return 1; |
a07ef784 | 816 | } |
aff063e2 | 817 | |
5c9b4692 | 818 | /* Currently, support only 4KB page cache size */ |
819 | if (F2FS_BLKSIZE != PAGE_CACHE_SIZE) { | |
820 | f2fs_msg(sb, KERN_INFO, | |
14d7e9de | 821 | "Invalid page_cache_size (%lu), supports only 4KB\n", |
5c9b4692 | 822 | PAGE_CACHE_SIZE); |
823 | return 1; | |
824 | } | |
825 | ||
aff063e2 JK |
826 | /* Currently, support only 4KB block size */ |
827 | blocksize = 1 << le32_to_cpu(raw_super->log_blocksize); | |
5c9b4692 | 828 | if (blocksize != F2FS_BLKSIZE) { |
a07ef784 NJ |
829 | f2fs_msg(sb, KERN_INFO, |
830 | "Invalid blocksize (%u), supports only 4KB\n", | |
831 | blocksize); | |
aff063e2 | 832 | return 1; |
a07ef784 | 833 | } |
5c9b4692 | 834 | |
55cf9cb6 CY |
835 | /* Currently, support 512/1024/2048/4096 bytes sector size */ |
836 | if (le32_to_cpu(raw_super->log_sectorsize) > | |
837 | F2FS_MAX_LOG_SECTOR_SIZE || | |
838 | le32_to_cpu(raw_super->log_sectorsize) < | |
839 | F2FS_MIN_LOG_SECTOR_SIZE) { | |
840 | f2fs_msg(sb, KERN_INFO, "Invalid log sectorsize (%u)", | |
841 | le32_to_cpu(raw_super->log_sectorsize)); | |
aff063e2 | 842 | return 1; |
a07ef784 | 843 | } |
55cf9cb6 CY |
844 | if (le32_to_cpu(raw_super->log_sectors_per_block) + |
845 | le32_to_cpu(raw_super->log_sectorsize) != | |
846 | F2FS_MAX_LOG_SECTOR_SIZE) { | |
847 | f2fs_msg(sb, KERN_INFO, | |
848 | "Invalid log sectors per block(%u) log sectorsize(%u)", | |
849 | le32_to_cpu(raw_super->log_sectors_per_block), | |
850 | le32_to_cpu(raw_super->log_sectorsize)); | |
aff063e2 | 851 | return 1; |
a07ef784 | 852 | } |
aff063e2 JK |
853 | return 0; |
854 | } | |
855 | ||
577e3495 | 856 | static int sanity_check_ckpt(struct f2fs_sb_info *sbi) |
aff063e2 JK |
857 | { |
858 | unsigned int total, fsmeta; | |
577e3495 JK |
859 | struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); |
860 | struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); | |
aff063e2 JK |
861 | |
862 | total = le32_to_cpu(raw_super->segment_count); | |
863 | fsmeta = le32_to_cpu(raw_super->segment_count_ckpt); | |
864 | fsmeta += le32_to_cpu(raw_super->segment_count_sit); | |
865 | fsmeta += le32_to_cpu(raw_super->segment_count_nat); | |
866 | fsmeta += le32_to_cpu(ckpt->rsvd_segment_count); | |
867 | fsmeta += le32_to_cpu(raw_super->segment_count_ssa); | |
868 | ||
6bacf52f | 869 | if (unlikely(fsmeta >= total)) |
aff063e2 | 870 | return 1; |
577e3495 | 871 | |
1e968fdf | 872 | if (unlikely(f2fs_cp_error(sbi))) { |
577e3495 JK |
873 | f2fs_msg(sbi->sb, KERN_ERR, "A bug case: need to run fsck"); |
874 | return 1; | |
875 | } | |
aff063e2 JK |
876 | return 0; |
877 | } | |
878 | ||
879 | static void init_sb_info(struct f2fs_sb_info *sbi) | |
880 | { | |
881 | struct f2fs_super_block *raw_super = sbi->raw_super; | |
882 | int i; | |
883 | ||
884 | sbi->log_sectors_per_block = | |
885 | le32_to_cpu(raw_super->log_sectors_per_block); | |
886 | sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize); | |
887 | sbi->blocksize = 1 << sbi->log_blocksize; | |
888 | sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg); | |
889 | sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg; | |
890 | sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec); | |
891 | sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone); | |
892 | sbi->total_sections = le32_to_cpu(raw_super->section_count); | |
893 | sbi->total_node_count = | |
894 | (le32_to_cpu(raw_super->segment_count_nat) / 2) | |
895 | * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK; | |
896 | sbi->root_ino_num = le32_to_cpu(raw_super->root_ino); | |
897 | sbi->node_ino_num = le32_to_cpu(raw_super->node_ino); | |
898 | sbi->meta_ino_num = le32_to_cpu(raw_super->meta_ino); | |
5ec4e49f | 899 | sbi->cur_victim_sec = NULL_SECNO; |
b1c57c1c | 900 | sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH; |
aff063e2 JK |
901 | |
902 | for (i = 0; i < NR_COUNT_TYPE; i++) | |
903 | atomic_set(&sbi->nr_pages[i], 0); | |
ab9fa662 JK |
904 | |
905 | sbi->dir_level = DEF_DIR_LEVEL; | |
caf0047e | 906 | clear_sbi_flag(sbi, SBI_NEED_FSCK); |
aff063e2 JK |
907 | } |
908 | ||
9076a75f GZ |
909 | /* |
910 | * Read f2fs raw super block. | |
911 | * Because we have two copies of super block, so read the first one at first, | |
912 | * if the first one is invalid, move to read the second one. | |
913 | */ | |
914 | static int read_raw_super_block(struct super_block *sb, | |
915 | struct f2fs_super_block **raw_super, | |
916 | struct buffer_head **raw_super_buf) | |
14d7e9de | 917 | { |
9076a75f | 918 | int block = 0; |
14d7e9de | 919 | |
9076a75f | 920 | retry: |
14d7e9de | 921 | *raw_super_buf = sb_bread(sb, block); |
922 | if (!*raw_super_buf) { | |
9076a75f GZ |
923 | f2fs_msg(sb, KERN_ERR, "Unable to read %dth superblock", |
924 | block + 1); | |
925 | if (block == 0) { | |
926 | block++; | |
927 | goto retry; | |
928 | } else { | |
929 | return -EIO; | |
930 | } | |
14d7e9de | 931 | } |
932 | ||
933 | *raw_super = (struct f2fs_super_block *) | |
934 | ((char *)(*raw_super_buf)->b_data + F2FS_SUPER_OFFSET); | |
935 | ||
936 | /* sanity checking of raw super */ | |
9076a75f GZ |
937 | if (sanity_check_raw_super(sb, *raw_super)) { |
938 | brelse(*raw_super_buf); | |
6c311ec6 CF |
939 | f2fs_msg(sb, KERN_ERR, |
940 | "Can't find valid F2FS filesystem in %dth superblock", | |
941 | block + 1); | |
6bacf52f | 942 | if (block == 0) { |
9076a75f GZ |
943 | block++; |
944 | goto retry; | |
945 | } else { | |
946 | return -EINVAL; | |
947 | } | |
948 | } | |
14d7e9de | 949 | |
9076a75f | 950 | return 0; |
14d7e9de | 951 | } |
952 | ||
aff063e2 JK |
953 | static int f2fs_fill_super(struct super_block *sb, void *data, int silent) |
954 | { | |
955 | struct f2fs_sb_info *sbi; | |
1730663c | 956 | struct f2fs_super_block *raw_super = NULL; |
aff063e2 JK |
957 | struct buffer_head *raw_super_buf; |
958 | struct inode *root; | |
959 | long err = -EINVAL; | |
ed2e621a | 960 | bool retry = true; |
dabc4a5c | 961 | char *options = NULL; |
971767ca | 962 | int i; |
aff063e2 | 963 | |
ed2e621a | 964 | try_onemore: |
aff063e2 JK |
965 | /* allocate memory for f2fs-specific super block info */ |
966 | sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL); | |
967 | if (!sbi) | |
968 | return -ENOMEM; | |
969 | ||
ff9234ad | 970 | /* set a block size */ |
6bacf52f | 971 | if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) { |
a07ef784 | 972 | f2fs_msg(sb, KERN_ERR, "unable to set blocksize"); |
aff063e2 | 973 | goto free_sbi; |
a07ef784 | 974 | } |
aff063e2 | 975 | |
9076a75f GZ |
976 | err = read_raw_super_block(sb, &raw_super, &raw_super_buf); |
977 | if (err) | |
978 | goto free_sbi; | |
979 | ||
5fb08372 | 980 | sb->s_fs_info = sbi; |
aff063e2 JK |
981 | /* init some FS parameters */ |
982 | sbi->active_logs = NR_CURSEG_TYPE; | |
983 | ||
984 | set_opt(sbi, BG_GC); | |
985 | ||
986 | #ifdef CONFIG_F2FS_FS_XATTR | |
987 | set_opt(sbi, XATTR_USER); | |
988 | #endif | |
989 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
990 | set_opt(sbi, POSIX_ACL); | |
991 | #endif | |
992 | /* parse mount options */ | |
dabc4a5c JK |
993 | options = kstrdup((const char *)data, GFP_KERNEL); |
994 | if (data && !options) { | |
995 | err = -ENOMEM; | |
aff063e2 | 996 | goto free_sb_buf; |
dabc4a5c JK |
997 | } |
998 | ||
999 | err = parse_options(sb, options); | |
1000 | if (err) | |
1001 | goto free_options; | |
aff063e2 | 1002 | |
25ca923b | 1003 | sb->s_maxbytes = max_file_size(le32_to_cpu(raw_super->log_blocksize)); |
aff063e2 JK |
1004 | sb->s_max_links = F2FS_LINK_MAX; |
1005 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
1006 | ||
1007 | sb->s_op = &f2fs_sops; | |
1008 | sb->s_xattr = f2fs_xattr_handlers; | |
1009 | sb->s_export_op = &f2fs_export_ops; | |
1010 | sb->s_magic = F2FS_SUPER_MAGIC; | |
aff063e2 JK |
1011 | sb->s_time_gran = 1; |
1012 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
1013 | (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0); | |
1014 | memcpy(sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid)); | |
1015 | ||
1016 | /* init f2fs-specific super block info */ | |
1017 | sbi->sb = sb; | |
1018 | sbi->raw_super = raw_super; | |
1019 | sbi->raw_super_buf = raw_super_buf; | |
1020 | mutex_init(&sbi->gc_mutex); | |
aff063e2 JK |
1021 | mutex_init(&sbi->writepages); |
1022 | mutex_init(&sbi->cp_mutex); | |
b3582c68 | 1023 | init_rwsem(&sbi->node_write); |
caf0047e | 1024 | clear_sbi_flag(sbi, SBI_POR_DOING); |
aff063e2 | 1025 | spin_lock_init(&sbi->stat_lock); |
971767ca | 1026 | |
df0f8dc0 | 1027 | init_rwsem(&sbi->read_io.io_rwsem); |
458e6197 JK |
1028 | sbi->read_io.sbi = sbi; |
1029 | sbi->read_io.bio = NULL; | |
1030 | for (i = 0; i < NR_PAGE_TYPE; i++) { | |
df0f8dc0 | 1031 | init_rwsem(&sbi->write_io[i].io_rwsem); |
458e6197 JK |
1032 | sbi->write_io[i].sbi = sbi; |
1033 | sbi->write_io[i].bio = NULL; | |
1034 | } | |
971767ca | 1035 | |
e479556b | 1036 | init_rwsem(&sbi->cp_rwsem); |
fb51b5ef | 1037 | init_waitqueue_head(&sbi->cp_wait); |
aff063e2 JK |
1038 | init_sb_info(sbi); |
1039 | ||
1040 | /* get an inode for meta space */ | |
1041 | sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi)); | |
1042 | if (IS_ERR(sbi->meta_inode)) { | |
a07ef784 | 1043 | f2fs_msg(sb, KERN_ERR, "Failed to read F2FS meta data inode"); |
aff063e2 | 1044 | err = PTR_ERR(sbi->meta_inode); |
dabc4a5c | 1045 | goto free_options; |
aff063e2 JK |
1046 | } |
1047 | ||
1048 | err = get_valid_checkpoint(sbi); | |
a07ef784 NJ |
1049 | if (err) { |
1050 | f2fs_msg(sb, KERN_ERR, "Failed to get valid F2FS checkpoint"); | |
aff063e2 | 1051 | goto free_meta_inode; |
a07ef784 | 1052 | } |
aff063e2 JK |
1053 | |
1054 | /* sanity checking of checkpoint */ | |
1055 | err = -EINVAL; | |
577e3495 | 1056 | if (sanity_check_ckpt(sbi)) { |
a07ef784 | 1057 | f2fs_msg(sb, KERN_ERR, "Invalid F2FS checkpoint"); |
aff063e2 | 1058 | goto free_cp; |
a07ef784 | 1059 | } |
aff063e2 JK |
1060 | |
1061 | sbi->total_valid_node_count = | |
1062 | le32_to_cpu(sbi->ckpt->valid_node_count); | |
1063 | sbi->total_valid_inode_count = | |
1064 | le32_to_cpu(sbi->ckpt->valid_inode_count); | |
1065 | sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count); | |
1066 | sbi->total_valid_block_count = | |
1067 | le64_to_cpu(sbi->ckpt->valid_block_count); | |
1068 | sbi->last_valid_block_count = sbi->total_valid_block_count; | |
1069 | sbi->alloc_valid_block_count = 0; | |
1070 | INIT_LIST_HEAD(&sbi->dir_inode_list); | |
1071 | spin_lock_init(&sbi->dir_inode_lock); | |
1072 | ||
6451e041 | 1073 | init_ino_entry_info(sbi); |
aff063e2 JK |
1074 | |
1075 | /* setup f2fs internal modules */ | |
1076 | err = build_segment_manager(sbi); | |
a07ef784 NJ |
1077 | if (err) { |
1078 | f2fs_msg(sb, KERN_ERR, | |
1079 | "Failed to initialize F2FS segment manager"); | |
aff063e2 | 1080 | goto free_sm; |
a07ef784 | 1081 | } |
aff063e2 | 1082 | err = build_node_manager(sbi); |
a07ef784 NJ |
1083 | if (err) { |
1084 | f2fs_msg(sb, KERN_ERR, | |
1085 | "Failed to initialize F2FS node manager"); | |
aff063e2 | 1086 | goto free_nm; |
a07ef784 | 1087 | } |
aff063e2 JK |
1088 | |
1089 | build_gc_manager(sbi); | |
1090 | ||
1091 | /* get an inode for node space */ | |
1092 | sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi)); | |
1093 | if (IS_ERR(sbi->node_inode)) { | |
a07ef784 | 1094 | f2fs_msg(sb, KERN_ERR, "Failed to read node inode"); |
aff063e2 JK |
1095 | err = PTR_ERR(sbi->node_inode); |
1096 | goto free_nm; | |
1097 | } | |
1098 | ||
1099 | /* if there are nt orphan nodes free them */ | |
8f99a946 | 1100 | recover_orphan_inodes(sbi); |
aff063e2 JK |
1101 | |
1102 | /* read root inode and dentry */ | |
1103 | root = f2fs_iget(sb, F2FS_ROOT_INO(sbi)); | |
1104 | if (IS_ERR(root)) { | |
a07ef784 | 1105 | f2fs_msg(sb, KERN_ERR, "Failed to read root inode"); |
aff063e2 JK |
1106 | err = PTR_ERR(root); |
1107 | goto free_node_inode; | |
1108 | } | |
8f99a946 | 1109 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { |
9d847950 | 1110 | iput(root); |
8f99a946 | 1111 | err = -EINVAL; |
9d847950 | 1112 | goto free_node_inode; |
8f99a946 | 1113 | } |
aff063e2 JK |
1114 | |
1115 | sb->s_root = d_make_root(root); /* allocate root dentry */ | |
1116 | if (!sb->s_root) { | |
1117 | err = -ENOMEM; | |
1118 | goto free_root_inode; | |
1119 | } | |
1120 | ||
aff063e2 JK |
1121 | err = f2fs_build_stats(sbi); |
1122 | if (err) | |
6437d1b0 | 1123 | goto free_root_inode; |
aff063e2 | 1124 | |
5e176d54 JK |
1125 | if (f2fs_proc_root) |
1126 | sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root); | |
1127 | ||
1128 | if (sbi->s_proc) | |
1129 | proc_create_data("segment_info", S_IRUGO, sbi->s_proc, | |
1130 | &f2fs_seq_segment_info_fops, sb); | |
1131 | ||
d3ee456d NJ |
1132 | if (test_opt(sbi, DISCARD)) { |
1133 | struct request_queue *q = bdev_get_queue(sb->s_bdev); | |
1134 | if (!blk_queue_discard(q)) | |
1135 | f2fs_msg(sb, KERN_WARNING, | |
1136 | "mounting with \"discard\" option, but " | |
1137 | "the device does not support discard"); | |
1138 | } | |
1139 | ||
b59d0bae NJ |
1140 | sbi->s_kobj.kset = f2fs_kset; |
1141 | init_completion(&sbi->s_kobj_unregister); | |
1142 | err = kobject_init_and_add(&sbi->s_kobj, &f2fs_ktype, NULL, | |
1143 | "%s", sb->s_id); | |
1144 | if (err) | |
6437d1b0 | 1145 | goto free_proc; |
b59d0bae | 1146 | |
b0c44f05 | 1147 | if (!retry) |
caf0047e | 1148 | set_sbi_flag(sbi, SBI_NEED_FSCK); |
b0c44f05 | 1149 | |
6437d1b0 JK |
1150 | /* recover fsynced data */ |
1151 | if (!test_opt(sbi, DISABLE_ROLL_FORWARD)) { | |
1152 | err = recover_fsync_data(sbi); | |
ed2e621a | 1153 | if (err) { |
6437d1b0 JK |
1154 | f2fs_msg(sb, KERN_ERR, |
1155 | "Cannot recover all fsync data errno=%ld", err); | |
ed2e621a JK |
1156 | goto free_kobj; |
1157 | } | |
6437d1b0 | 1158 | } |
b59d0bae | 1159 | |
6437d1b0 JK |
1160 | /* |
1161 | * If filesystem is not mounted as read-only then | |
1162 | * do start the gc_thread. | |
1163 | */ | |
6c029932 | 1164 | if (test_opt(sbi, BG_GC) && !f2fs_readonly(sb)) { |
6437d1b0 JK |
1165 | /* After POR, we can run background GC thread.*/ |
1166 | err = start_gc_thread(sbi); | |
1167 | if (err) | |
1168 | goto free_kobj; | |
1169 | } | |
dabc4a5c | 1170 | kfree(options); |
aff063e2 | 1171 | return 0; |
6437d1b0 JK |
1172 | |
1173 | free_kobj: | |
1174 | kobject_del(&sbi->s_kobj); | |
1175 | free_proc: | |
1d15bd20 CY |
1176 | if (sbi->s_proc) { |
1177 | remove_proc_entry("segment_info", sbi->s_proc); | |
1178 | remove_proc_entry(sb->s_id, f2fs_proc_root); | |
1179 | } | |
1180 | f2fs_destroy_stats(sbi); | |
aff063e2 JK |
1181 | free_root_inode: |
1182 | dput(sb->s_root); | |
1183 | sb->s_root = NULL; | |
1184 | free_node_inode: | |
1185 | iput(sbi->node_inode); | |
1186 | free_nm: | |
1187 | destroy_node_manager(sbi); | |
1188 | free_sm: | |
1189 | destroy_segment_manager(sbi); | |
1190 | free_cp: | |
1191 | kfree(sbi->ckpt); | |
1192 | free_meta_inode: | |
1193 | make_bad_inode(sbi->meta_inode); | |
1194 | iput(sbi->meta_inode); | |
dabc4a5c JK |
1195 | free_options: |
1196 | kfree(options); | |
aff063e2 JK |
1197 | free_sb_buf: |
1198 | brelse(raw_super_buf); | |
1199 | free_sbi: | |
1200 | kfree(sbi); | |
ed2e621a JK |
1201 | |
1202 | /* give only one another chance */ | |
1203 | if (retry) { | |
922cedbd | 1204 | retry = 0; |
ed2e621a JK |
1205 | shrink_dcache_sb(sb); |
1206 | goto try_onemore; | |
1207 | } | |
aff063e2 JK |
1208 | return err; |
1209 | } | |
1210 | ||
1211 | static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags, | |
1212 | const char *dev_name, void *data) | |
1213 | { | |
1214 | return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super); | |
1215 | } | |
1216 | ||
30a5537f JK |
1217 | static void kill_f2fs_super(struct super_block *sb) |
1218 | { | |
1219 | if (sb->s_root) | |
caf0047e | 1220 | set_sbi_flag(F2FS_SB(sb), SBI_IS_CLOSE); |
30a5537f JK |
1221 | kill_block_super(sb); |
1222 | } | |
1223 | ||
aff063e2 JK |
1224 | static struct file_system_type f2fs_fs_type = { |
1225 | .owner = THIS_MODULE, | |
1226 | .name = "f2fs", | |
1227 | .mount = f2fs_mount, | |
30a5537f | 1228 | .kill_sb = kill_f2fs_super, |
aff063e2 JK |
1229 | .fs_flags = FS_REQUIRES_DEV, |
1230 | }; | |
7f78e035 | 1231 | MODULE_ALIAS_FS("f2fs"); |
aff063e2 | 1232 | |
6e6093a8 | 1233 | static int __init init_inodecache(void) |
aff063e2 JK |
1234 | { |
1235 | f2fs_inode_cachep = f2fs_kmem_cache_create("f2fs_inode_cache", | |
e8512d2e | 1236 | sizeof(struct f2fs_inode_info)); |
6bacf52f | 1237 | if (!f2fs_inode_cachep) |
aff063e2 JK |
1238 | return -ENOMEM; |
1239 | return 0; | |
1240 | } | |
1241 | ||
1242 | static void destroy_inodecache(void) | |
1243 | { | |
1244 | /* | |
1245 | * Make sure all delayed rcu free inodes are flushed before we | |
1246 | * destroy cache. | |
1247 | */ | |
1248 | rcu_barrier(); | |
1249 | kmem_cache_destroy(f2fs_inode_cachep); | |
1250 | } | |
1251 | ||
1252 | static int __init init_f2fs_fs(void) | |
1253 | { | |
1254 | int err; | |
1255 | ||
c0508650 JK |
1256 | f2fs_build_trace_ios(); |
1257 | ||
aff063e2 JK |
1258 | err = init_inodecache(); |
1259 | if (err) | |
1260 | goto fail; | |
1261 | err = create_node_manager_caches(); | |
1262 | if (err) | |
9890ff3f | 1263 | goto free_inodecache; |
7fd9e544 | 1264 | err = create_segment_manager_caches(); |
aff063e2 | 1265 | if (err) |
9890ff3f | 1266 | goto free_node_manager_caches; |
aff063e2 JK |
1267 | err = create_checkpoint_caches(); |
1268 | if (err) | |
06292073 | 1269 | goto free_segment_manager_caches; |
b59d0bae | 1270 | f2fs_kset = kset_create_and_add("f2fs", NULL, fs_kobj); |
6e6b978c WY |
1271 | if (!f2fs_kset) { |
1272 | err = -ENOMEM; | |
9890ff3f | 1273 | goto free_checkpoint_caches; |
6e6b978c | 1274 | } |
4589d25d NJ |
1275 | err = register_filesystem(&f2fs_fs_type); |
1276 | if (err) | |
9890ff3f | 1277 | goto free_kset; |
4589d25d | 1278 | f2fs_create_root_stats(); |
5e176d54 | 1279 | f2fs_proc_root = proc_mkdir("fs/f2fs", NULL); |
9890ff3f ZH |
1280 | return 0; |
1281 | ||
1282 | free_kset: | |
1283 | kset_unregister(f2fs_kset); | |
1284 | free_checkpoint_caches: | |
1285 | destroy_checkpoint_caches(); | |
7fd9e544 JK |
1286 | free_segment_manager_caches: |
1287 | destroy_segment_manager_caches(); | |
9890ff3f ZH |
1288 | free_node_manager_caches: |
1289 | destroy_node_manager_caches(); | |
1290 | free_inodecache: | |
1291 | destroy_inodecache(); | |
aff063e2 JK |
1292 | fail: |
1293 | return err; | |
1294 | } | |
1295 | ||
1296 | static void __exit exit_f2fs_fs(void) | |
1297 | { | |
5e176d54 | 1298 | remove_proc_entry("fs/f2fs", NULL); |
4589d25d | 1299 | f2fs_destroy_root_stats(); |
aff063e2 JK |
1300 | unregister_filesystem(&f2fs_fs_type); |
1301 | destroy_checkpoint_caches(); | |
5dcd8a71 | 1302 | destroy_segment_manager_caches(); |
aff063e2 JK |
1303 | destroy_node_manager_caches(); |
1304 | destroy_inodecache(); | |
b59d0bae | 1305 | kset_unregister(f2fs_kset); |
351f4fba | 1306 | f2fs_destroy_trace_ios(); |
aff063e2 JK |
1307 | } |
1308 | ||
1309 | module_init(init_f2fs_fs) | |
1310 | module_exit(exit_f2fs_fs) | |
1311 | ||
1312 | MODULE_AUTHOR("Samsung Electronics's Praesto Team"); | |
1313 | MODULE_DESCRIPTION("Flash Friendly File System"); | |
1314 | MODULE_LICENSE("GPL"); |