Commit | Line | Data |
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0a8165d7 | 1 | /* |
aff063e2 JK |
2 | * fs/f2fs/super.c |
3 | * | |
4 | * Copyright (c) 2012 Samsung Electronics Co., Ltd. | |
5 | * http://www.samsung.com/ | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | #include <linux/module.h> | |
12 | #include <linux/init.h> | |
13 | #include <linux/fs.h> | |
14 | #include <linux/statfs.h> | |
aff063e2 JK |
15 | #include <linux/buffer_head.h> |
16 | #include <linux/backing-dev.h> | |
17 | #include <linux/kthread.h> | |
18 | #include <linux/parser.h> | |
19 | #include <linux/mount.h> | |
20 | #include <linux/seq_file.h> | |
5e176d54 | 21 | #include <linux/proc_fs.h> |
aff063e2 JK |
22 | #include <linux/random.h> |
23 | #include <linux/exportfs.h> | |
d3ee456d | 24 | #include <linux/blkdev.h> |
aff063e2 | 25 | #include <linux/f2fs_fs.h> |
b59d0bae | 26 | #include <linux/sysfs.h> |
aff063e2 JK |
27 | |
28 | #include "f2fs.h" | |
29 | #include "node.h" | |
5ec4e49f | 30 | #include "segment.h" |
aff063e2 | 31 | #include "xattr.h" |
b59d0bae | 32 | #include "gc.h" |
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 JK |
44 | Opt_disable_roll_forward, |
45 | Opt_discard, | |
46 | Opt_noheap, | |
4058c511 | 47 | Opt_user_xattr, |
aff063e2 | 48 | Opt_nouser_xattr, |
4058c511 | 49 | Opt_acl, |
aff063e2 JK |
50 | Opt_noacl, |
51 | Opt_active_logs, | |
52 | Opt_disable_ext_identify, | |
444c580f | 53 | Opt_inline_xattr, |
8274de77 | 54 | Opt_inline_data, |
5efd3c6f | 55 | Opt_inline_dentry, |
6b4afdd7 | 56 | Opt_flush_merge, |
0f7b2abd | 57 | Opt_nobarrier, |
d5053a34 | 58 | Opt_fastboot, |
aff063e2 JK |
59 | Opt_err, |
60 | }; | |
61 | ||
62 | static match_table_t f2fs_tokens = { | |
696c018c | 63 | {Opt_gc_background, "background_gc=%s"}, |
aff063e2 JK |
64 | {Opt_disable_roll_forward, "disable_roll_forward"}, |
65 | {Opt_discard, "discard"}, | |
66 | {Opt_noheap, "no_heap"}, | |
4058c511 | 67 | {Opt_user_xattr, "user_xattr"}, |
aff063e2 | 68 | {Opt_nouser_xattr, "nouser_xattr"}, |
4058c511 | 69 | {Opt_acl, "acl"}, |
aff063e2 JK |
70 | {Opt_noacl, "noacl"}, |
71 | {Opt_active_logs, "active_logs=%u"}, | |
72 | {Opt_disable_ext_identify, "disable_ext_identify"}, | |
444c580f | 73 | {Opt_inline_xattr, "inline_xattr"}, |
8274de77 | 74 | {Opt_inline_data, "inline_data"}, |
5efd3c6f | 75 | {Opt_inline_dentry, "inline_dentry"}, |
6b4afdd7 | 76 | {Opt_flush_merge, "flush_merge"}, |
0f7b2abd | 77 | {Opt_nobarrier, "nobarrier"}, |
d5053a34 | 78 | {Opt_fastboot, "fastboot"}, |
aff063e2 JK |
79 | {Opt_err, NULL}, |
80 | }; | |
81 | ||
b59d0bae | 82 | /* Sysfs support for f2fs */ |
ea91e9b0 JK |
83 | enum { |
84 | GC_THREAD, /* struct f2fs_gc_thread */ | |
85 | SM_INFO, /* struct f2fs_sm_info */ | |
cdfc41c1 | 86 | NM_INFO, /* struct f2fs_nm_info */ |
b1c57c1c | 87 | F2FS_SBI, /* struct f2fs_sb_info */ |
ea91e9b0 JK |
88 | }; |
89 | ||
b59d0bae NJ |
90 | struct f2fs_attr { |
91 | struct attribute attr; | |
92 | ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *); | |
93 | ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *, | |
94 | const char *, size_t); | |
ea91e9b0 | 95 | int struct_type; |
b59d0bae NJ |
96 | int offset; |
97 | }; | |
98 | ||
ea91e9b0 JK |
99 | static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type) |
100 | { | |
101 | if (struct_type == GC_THREAD) | |
102 | return (unsigned char *)sbi->gc_thread; | |
103 | else if (struct_type == SM_INFO) | |
104 | return (unsigned char *)SM_I(sbi); | |
cdfc41c1 JK |
105 | else if (struct_type == NM_INFO) |
106 | return (unsigned char *)NM_I(sbi); | |
b1c57c1c JK |
107 | else if (struct_type == F2FS_SBI) |
108 | return (unsigned char *)sbi; | |
ea91e9b0 JK |
109 | return NULL; |
110 | } | |
111 | ||
b59d0bae NJ |
112 | static ssize_t f2fs_sbi_show(struct f2fs_attr *a, |
113 | struct f2fs_sb_info *sbi, char *buf) | |
114 | { | |
ea91e9b0 | 115 | unsigned char *ptr = NULL; |
b59d0bae NJ |
116 | unsigned int *ui; |
117 | ||
ea91e9b0 JK |
118 | ptr = __struct_ptr(sbi, a->struct_type); |
119 | if (!ptr) | |
b59d0bae NJ |
120 | return -EINVAL; |
121 | ||
ea91e9b0 | 122 | ui = (unsigned int *)(ptr + a->offset); |
b59d0bae NJ |
123 | |
124 | return snprintf(buf, PAGE_SIZE, "%u\n", *ui); | |
125 | } | |
126 | ||
127 | static ssize_t f2fs_sbi_store(struct f2fs_attr *a, | |
128 | struct f2fs_sb_info *sbi, | |
129 | const char *buf, size_t count) | |
130 | { | |
ea91e9b0 | 131 | unsigned char *ptr; |
b59d0bae NJ |
132 | unsigned long t; |
133 | unsigned int *ui; | |
134 | ssize_t ret; | |
135 | ||
ea91e9b0 JK |
136 | ptr = __struct_ptr(sbi, a->struct_type); |
137 | if (!ptr) | |
b59d0bae NJ |
138 | return -EINVAL; |
139 | ||
ea91e9b0 | 140 | ui = (unsigned int *)(ptr + a->offset); |
b59d0bae NJ |
141 | |
142 | ret = kstrtoul(skip_spaces(buf), 0, &t); | |
143 | if (ret < 0) | |
144 | return ret; | |
145 | *ui = t; | |
146 | return count; | |
147 | } | |
148 | ||
149 | static ssize_t f2fs_attr_show(struct kobject *kobj, | |
150 | struct attribute *attr, char *buf) | |
151 | { | |
152 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, | |
153 | s_kobj); | |
154 | struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); | |
155 | ||
156 | return a->show ? a->show(a, sbi, buf) : 0; | |
157 | } | |
158 | ||
159 | static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr, | |
160 | const char *buf, size_t len) | |
161 | { | |
162 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, | |
163 | s_kobj); | |
164 | struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr); | |
165 | ||
166 | return a->store ? a->store(a, sbi, buf, len) : 0; | |
167 | } | |
168 | ||
169 | static void f2fs_sb_release(struct kobject *kobj) | |
170 | { | |
171 | struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info, | |
172 | s_kobj); | |
173 | complete(&sbi->s_kobj_unregister); | |
174 | } | |
175 | ||
ea91e9b0 | 176 | #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \ |
b59d0bae NJ |
177 | static struct f2fs_attr f2fs_attr_##_name = { \ |
178 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
179 | .show = _show, \ | |
180 | .store = _store, \ | |
ea91e9b0 JK |
181 | .struct_type = _struct_type, \ |
182 | .offset = _offset \ | |
b59d0bae NJ |
183 | } |
184 | ||
ea91e9b0 JK |
185 | #define F2FS_RW_ATTR(struct_type, struct_name, name, elname) \ |
186 | F2FS_ATTR_OFFSET(struct_type, name, 0644, \ | |
187 | f2fs_sbi_show, f2fs_sbi_store, \ | |
188 | offsetof(struct struct_name, elname)) | |
b59d0bae | 189 | |
ea91e9b0 JK |
190 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time); |
191 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time); | |
192 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time); | |
193 | F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_idle, gc_idle); | |
194 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments); | |
7ac8c3b0 | 195 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, max_small_discards, max_discards); |
216fbd64 JK |
196 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy); |
197 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util); | |
c1ce1b02 | 198 | F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks); |
cdfc41c1 | 199 | F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh); |
b1c57c1c | 200 | F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search); |
ab9fa662 | 201 | F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level); |
b59d0bae NJ |
202 | |
203 | #define ATTR_LIST(name) (&f2fs_attr_##name.attr) | |
204 | static struct attribute *f2fs_attrs[] = { | |
205 | ATTR_LIST(gc_min_sleep_time), | |
206 | ATTR_LIST(gc_max_sleep_time), | |
207 | ATTR_LIST(gc_no_gc_sleep_time), | |
d2dc095f | 208 | ATTR_LIST(gc_idle), |
ea91e9b0 | 209 | ATTR_LIST(reclaim_segments), |
7ac8c3b0 | 210 | ATTR_LIST(max_small_discards), |
216fbd64 JK |
211 | ATTR_LIST(ipu_policy), |
212 | ATTR_LIST(min_ipu_util), | |
c1ce1b02 | 213 | ATTR_LIST(min_fsync_blocks), |
b1c57c1c | 214 | ATTR_LIST(max_victim_search), |
ab9fa662 | 215 | ATTR_LIST(dir_level), |
cdfc41c1 | 216 | ATTR_LIST(ram_thresh), |
b59d0bae NJ |
217 | NULL, |
218 | }; | |
219 | ||
220 | static const struct sysfs_ops f2fs_attr_ops = { | |
221 | .show = f2fs_attr_show, | |
222 | .store = f2fs_attr_store, | |
223 | }; | |
224 | ||
225 | static struct kobj_type f2fs_ktype = { | |
226 | .default_attrs = f2fs_attrs, | |
227 | .sysfs_ops = &f2fs_attr_ops, | |
228 | .release = f2fs_sb_release, | |
229 | }; | |
230 | ||
a07ef784 NJ |
231 | void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...) |
232 | { | |
233 | struct va_format vaf; | |
234 | va_list args; | |
235 | ||
236 | va_start(args, fmt); | |
237 | vaf.fmt = fmt; | |
238 | vaf.va = &args; | |
239 | printk("%sF2FS-fs (%s): %pV\n", level, sb->s_id, &vaf); | |
240 | va_end(args); | |
241 | } | |
242 | ||
aff063e2 JK |
243 | static void init_once(void *foo) |
244 | { | |
245 | struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo; | |
246 | ||
aff063e2 JK |
247 | inode_init_once(&fi->vfs_inode); |
248 | } | |
249 | ||
696c018c NJ |
250 | static int parse_options(struct super_block *sb, char *options) |
251 | { | |
252 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
253 | substring_t args[MAX_OPT_ARGS]; | |
254 | char *p, *name; | |
255 | int arg = 0; | |
256 | ||
257 | if (!options) | |
258 | return 0; | |
259 | ||
260 | while ((p = strsep(&options, ",")) != NULL) { | |
261 | int token; | |
262 | if (!*p) | |
263 | continue; | |
264 | /* | |
265 | * Initialize args struct so we know whether arg was | |
266 | * found; some options take optional arguments. | |
267 | */ | |
268 | args[0].to = args[0].from = NULL; | |
269 | token = match_token(p, f2fs_tokens, args); | |
270 | ||
271 | switch (token) { | |
272 | case Opt_gc_background: | |
273 | name = match_strdup(&args[0]); | |
274 | ||
275 | if (!name) | |
276 | return -ENOMEM; | |
04c09388 | 277 | if (strlen(name) == 2 && !strncmp(name, "on", 2)) |
696c018c | 278 | set_opt(sbi, BG_GC); |
04c09388 | 279 | else if (strlen(name) == 3 && !strncmp(name, "off", 3)) |
696c018c NJ |
280 | clear_opt(sbi, BG_GC); |
281 | else { | |
282 | kfree(name); | |
283 | return -EINVAL; | |
284 | } | |
285 | kfree(name); | |
286 | break; | |
287 | case Opt_disable_roll_forward: | |
288 | set_opt(sbi, DISABLE_ROLL_FORWARD); | |
289 | break; | |
290 | case Opt_discard: | |
291 | set_opt(sbi, DISCARD); | |
292 | break; | |
293 | case Opt_noheap: | |
294 | set_opt(sbi, NOHEAP); | |
295 | break; | |
296 | #ifdef CONFIG_F2FS_FS_XATTR | |
4058c511 KA |
297 | case Opt_user_xattr: |
298 | set_opt(sbi, XATTR_USER); | |
299 | break; | |
696c018c NJ |
300 | case Opt_nouser_xattr: |
301 | clear_opt(sbi, XATTR_USER); | |
302 | break; | |
444c580f JK |
303 | case Opt_inline_xattr: |
304 | set_opt(sbi, INLINE_XATTR); | |
305 | break; | |
696c018c | 306 | #else |
4058c511 KA |
307 | case Opt_user_xattr: |
308 | f2fs_msg(sb, KERN_INFO, | |
309 | "user_xattr options not supported"); | |
310 | break; | |
696c018c NJ |
311 | case Opt_nouser_xattr: |
312 | f2fs_msg(sb, KERN_INFO, | |
313 | "nouser_xattr options not supported"); | |
314 | break; | |
444c580f JK |
315 | case Opt_inline_xattr: |
316 | f2fs_msg(sb, KERN_INFO, | |
317 | "inline_xattr options not supported"); | |
318 | break; | |
696c018c NJ |
319 | #endif |
320 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
4058c511 KA |
321 | case Opt_acl: |
322 | set_opt(sbi, POSIX_ACL); | |
323 | break; | |
696c018c NJ |
324 | case Opt_noacl: |
325 | clear_opt(sbi, POSIX_ACL); | |
326 | break; | |
327 | #else | |
4058c511 KA |
328 | case Opt_acl: |
329 | f2fs_msg(sb, KERN_INFO, "acl options not supported"); | |
330 | break; | |
696c018c NJ |
331 | case Opt_noacl: |
332 | f2fs_msg(sb, KERN_INFO, "noacl options not supported"); | |
333 | break; | |
334 | #endif | |
335 | case Opt_active_logs: | |
336 | if (args->from && match_int(args, &arg)) | |
337 | return -EINVAL; | |
338 | if (arg != 2 && arg != 4 && arg != NR_CURSEG_TYPE) | |
339 | return -EINVAL; | |
340 | sbi->active_logs = arg; | |
341 | break; | |
342 | case Opt_disable_ext_identify: | |
343 | set_opt(sbi, DISABLE_EXT_IDENTIFY); | |
344 | break; | |
8274de77 HL |
345 | case Opt_inline_data: |
346 | set_opt(sbi, INLINE_DATA); | |
347 | break; | |
5efd3c6f CY |
348 | case Opt_inline_dentry: |
349 | set_opt(sbi, INLINE_DENTRY); | |
350 | break; | |
6b4afdd7 JK |
351 | case Opt_flush_merge: |
352 | set_opt(sbi, FLUSH_MERGE); | |
353 | break; | |
0f7b2abd JK |
354 | case Opt_nobarrier: |
355 | set_opt(sbi, NOBARRIER); | |
356 | break; | |
d5053a34 JK |
357 | case Opt_fastboot: |
358 | set_opt(sbi, FASTBOOT); | |
359 | break; | |
696c018c NJ |
360 | default: |
361 | f2fs_msg(sb, KERN_ERR, | |
362 | "Unrecognized mount option \"%s\" or missing value", | |
363 | p); | |
364 | return -EINVAL; | |
365 | } | |
366 | } | |
367 | return 0; | |
368 | } | |
369 | ||
aff063e2 JK |
370 | static struct inode *f2fs_alloc_inode(struct super_block *sb) |
371 | { | |
372 | struct f2fs_inode_info *fi; | |
373 | ||
a0acdfe0 | 374 | fi = kmem_cache_alloc(f2fs_inode_cachep, GFP_F2FS_ZERO); |
aff063e2 JK |
375 | if (!fi) |
376 | return NULL; | |
377 | ||
378 | init_once((void *) fi); | |
379 | ||
434720fa | 380 | /* Initialize f2fs-specific inode info */ |
aff063e2 | 381 | fi->vfs_inode.i_version = 1; |
a7ffdbe2 | 382 | atomic_set(&fi->dirty_pages, 0); |
aff063e2 JK |
383 | fi->i_current_depth = 1; |
384 | fi->i_advise = 0; | |
385 | rwlock_init(&fi->ext.ext_lock); | |
d928bfbf | 386 | init_rwsem(&fi->i_sem); |
34ba94ba | 387 | INIT_RADIX_TREE(&fi->inmem_root, GFP_NOFS); |
88b88a66 JK |
388 | INIT_LIST_HEAD(&fi->inmem_pages); |
389 | mutex_init(&fi->inmem_lock); | |
aff063e2 JK |
390 | |
391 | set_inode_flag(fi, FI_NEW_INODE); | |
392 | ||
444c580f JK |
393 | if (test_opt(F2FS_SB(sb), INLINE_XATTR)) |
394 | set_inode_flag(fi, FI_INLINE_XATTR); | |
395 | ||
ab9fa662 JK |
396 | /* Will be used by directory only */ |
397 | fi->i_dir_level = F2FS_SB(sb)->dir_level; | |
398 | ||
aff063e2 JK |
399 | return &fi->vfs_inode; |
400 | } | |
401 | ||
531ad7d5 JK |
402 | static int f2fs_drop_inode(struct inode *inode) |
403 | { | |
404 | /* | |
405 | * This is to avoid a deadlock condition like below. | |
406 | * writeback_single_inode(inode) | |
407 | * - f2fs_write_data_page | |
408 | * - f2fs_gc -> iput -> evict | |
409 | * - inode_wait_for_writeback(inode) | |
410 | */ | |
411 | if (!inode_unhashed(inode) && inode->i_state & I_SYNC) | |
412 | return 0; | |
413 | return generic_drop_inode(inode); | |
414 | } | |
415 | ||
b3783873 JK |
416 | /* |
417 | * f2fs_dirty_inode() is called from __mark_inode_dirty() | |
418 | * | |
419 | * We should call set_dirty_inode to write the dirty inode through write_inode. | |
420 | */ | |
421 | static void f2fs_dirty_inode(struct inode *inode, int flags) | |
422 | { | |
423 | set_inode_flag(F2FS_I(inode), FI_DIRTY_INODE); | |
b3783873 JK |
424 | } |
425 | ||
aff063e2 JK |
426 | static void f2fs_i_callback(struct rcu_head *head) |
427 | { | |
428 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
429 | kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode)); | |
430 | } | |
431 | ||
25ca923b | 432 | static void f2fs_destroy_inode(struct inode *inode) |
aff063e2 JK |
433 | { |
434 | call_rcu(&inode->i_rcu, f2fs_i_callback); | |
435 | } | |
436 | ||
437 | static void f2fs_put_super(struct super_block *sb) | |
438 | { | |
439 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
440 | ||
5e176d54 JK |
441 | if (sbi->s_proc) { |
442 | remove_proc_entry("segment_info", sbi->s_proc); | |
443 | remove_proc_entry(sb->s_id, f2fs_proc_root); | |
444 | } | |
b59d0bae | 445 | kobject_del(&sbi->s_kobj); |
5e176d54 | 446 | |
aff063e2 JK |
447 | f2fs_destroy_stats(sbi); |
448 | stop_gc_thread(sbi); | |
449 | ||
5887d291 | 450 | /* We don't need to do checkpoint when it's clean */ |
75ab4cb8 JK |
451 | if (sbi->s_dirty) { |
452 | struct cp_control cpc = { | |
453 | .reason = CP_UMOUNT, | |
454 | }; | |
455 | write_checkpoint(sbi, &cpc); | |
456 | } | |
aff063e2 | 457 | |
cf779cab JK |
458 | /* |
459 | * normally superblock is clean, so we need to release this. | |
460 | * In addition, EIO will skip do checkpoint, we need this as well. | |
461 | */ | |
6f12ac25 | 462 | release_dirty_inode(sbi); |
4b2fecc8 | 463 | release_discard_addrs(sbi); |
6f12ac25 | 464 | |
aff063e2 JK |
465 | iput(sbi->node_inode); |
466 | iput(sbi->meta_inode); | |
467 | ||
468 | /* destroy f2fs internal modules */ | |
469 | destroy_node_manager(sbi); | |
470 | destroy_segment_manager(sbi); | |
471 | ||
472 | kfree(sbi->ckpt); | |
b59d0bae NJ |
473 | kobject_put(&sbi->s_kobj); |
474 | wait_for_completion(&sbi->s_kobj_unregister); | |
aff063e2 JK |
475 | |
476 | sb->s_fs_info = NULL; | |
477 | brelse(sbi->raw_super_buf); | |
478 | kfree(sbi); | |
479 | } | |
480 | ||
481 | int f2fs_sync_fs(struct super_block *sb, int sync) | |
482 | { | |
483 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
aff063e2 | 484 | |
a2a4a7e4 NJ |
485 | trace_f2fs_sync_fs(sb, sync); |
486 | ||
b7473754 | 487 | if (sync) { |
d5053a34 JK |
488 | struct cp_control cpc; |
489 | ||
490 | cpc.reason = test_opt(sbi, FASTBOOT) ? CP_UMOUNT : CP_SYNC; | |
b7473754 | 491 | mutex_lock(&sbi->gc_mutex); |
75ab4cb8 | 492 | write_checkpoint(sbi, &cpc); |
b7473754 JK |
493 | mutex_unlock(&sbi->gc_mutex); |
494 | } else { | |
7d82db83 | 495 | f2fs_balance_fs(sbi); |
b7473754 | 496 | } |
db9f7c1a | 497 | f2fs_trace_ios(NULL, NULL, 1); |
aff063e2 | 498 | |
64c576fe | 499 | return 0; |
aff063e2 JK |
500 | } |
501 | ||
d6212a5f CL |
502 | static int f2fs_freeze(struct super_block *sb) |
503 | { | |
504 | int err; | |
505 | ||
77888c1e | 506 | if (f2fs_readonly(sb)) |
d6212a5f CL |
507 | return 0; |
508 | ||
509 | err = f2fs_sync_fs(sb, 1); | |
510 | return err; | |
511 | } | |
512 | ||
513 | static int f2fs_unfreeze(struct super_block *sb) | |
514 | { | |
515 | return 0; | |
516 | } | |
517 | ||
aff063e2 JK |
518 | static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf) |
519 | { | |
520 | struct super_block *sb = dentry->d_sb; | |
521 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
522 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); | |
523 | block_t total_count, user_block_count, start_count, ovp_count; | |
524 | ||
525 | total_count = le64_to_cpu(sbi->raw_super->block_count); | |
526 | user_block_count = sbi->user_block_count; | |
527 | start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr); | |
528 | ovp_count = SM_I(sbi)->ovp_segments << sbi->log_blocks_per_seg; | |
529 | buf->f_type = F2FS_SUPER_MAGIC; | |
530 | buf->f_bsize = sbi->blocksize; | |
531 | ||
532 | buf->f_blocks = total_count - start_count; | |
533 | buf->f_bfree = buf->f_blocks - valid_user_blocks(sbi) - ovp_count; | |
534 | buf->f_bavail = user_block_count - valid_user_blocks(sbi); | |
535 | ||
c200b1aa CY |
536 | buf->f_files = sbi->total_node_count - F2FS_RESERVED_NODE_NUM; |
537 | buf->f_ffree = buf->f_files - valid_inode_count(sbi); | |
aff063e2 | 538 | |
5a20d339 | 539 | buf->f_namelen = F2FS_NAME_LEN; |
aff063e2 JK |
540 | buf->f_fsid.val[0] = (u32)id; |
541 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
542 | ||
543 | return 0; | |
544 | } | |
545 | ||
546 | static int f2fs_show_options(struct seq_file *seq, struct dentry *root) | |
547 | { | |
548 | struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb); | |
549 | ||
b270ad6f | 550 | if (!f2fs_readonly(sbi->sb) && test_opt(sbi, BG_GC)) |
696c018c | 551 | seq_printf(seq, ",background_gc=%s", "on"); |
aff063e2 | 552 | else |
696c018c | 553 | seq_printf(seq, ",background_gc=%s", "off"); |
aff063e2 JK |
554 | if (test_opt(sbi, DISABLE_ROLL_FORWARD)) |
555 | seq_puts(seq, ",disable_roll_forward"); | |
556 | if (test_opt(sbi, DISCARD)) | |
557 | seq_puts(seq, ",discard"); | |
558 | if (test_opt(sbi, NOHEAP)) | |
559 | seq_puts(seq, ",no_heap_alloc"); | |
560 | #ifdef CONFIG_F2FS_FS_XATTR | |
561 | if (test_opt(sbi, XATTR_USER)) | |
562 | seq_puts(seq, ",user_xattr"); | |
563 | else | |
564 | seq_puts(seq, ",nouser_xattr"); | |
444c580f JK |
565 | if (test_opt(sbi, INLINE_XATTR)) |
566 | seq_puts(seq, ",inline_xattr"); | |
aff063e2 JK |
567 | #endif |
568 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
569 | if (test_opt(sbi, POSIX_ACL)) | |
570 | seq_puts(seq, ",acl"); | |
571 | else | |
572 | seq_puts(seq, ",noacl"); | |
573 | #endif | |
574 | if (test_opt(sbi, DISABLE_EXT_IDENTIFY)) | |
aa43507f | 575 | seq_puts(seq, ",disable_ext_identify"); |
8274de77 HL |
576 | if (test_opt(sbi, INLINE_DATA)) |
577 | seq_puts(seq, ",inline_data"); | |
5efd3c6f CY |
578 | if (test_opt(sbi, INLINE_DENTRY)) |
579 | seq_puts(seq, ",inline_dentry"); | |
b270ad6f | 580 | if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE)) |
6b4afdd7 | 581 | seq_puts(seq, ",flush_merge"); |
0f7b2abd JK |
582 | if (test_opt(sbi, NOBARRIER)) |
583 | seq_puts(seq, ",nobarrier"); | |
d5053a34 JK |
584 | if (test_opt(sbi, FASTBOOT)) |
585 | seq_puts(seq, ",fastboot"); | |
aff063e2 JK |
586 | seq_printf(seq, ",active_logs=%u", sbi->active_logs); |
587 | ||
588 | return 0; | |
589 | } | |
590 | ||
5e176d54 JK |
591 | static int segment_info_seq_show(struct seq_file *seq, void *offset) |
592 | { | |
593 | struct super_block *sb = seq->private; | |
594 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
6c311ec6 CF |
595 | unsigned int total_segs = |
596 | le32_to_cpu(sbi->raw_super->segment_count_main); | |
5e176d54 JK |
597 | int i; |
598 | ||
90aa6dc9 CY |
599 | seq_puts(seq, "format: segment_type|valid_blocks\n" |
600 | "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n"); | |
601 | ||
5e176d54 | 602 | for (i = 0; i < total_segs; i++) { |
90aa6dc9 CY |
603 | struct seg_entry *se = get_seg_entry(sbi, i); |
604 | ||
605 | if ((i % 10) == 0) | |
606 | seq_printf(seq, "%-5d", i); | |
607 | seq_printf(seq, "%d|%-3u", se->type, | |
608 | get_valid_blocks(sbi, i, 1)); | |
46c04366 GZ |
609 | if ((i % 10) == 9 || i == (total_segs - 1)) |
610 | seq_putc(seq, '\n'); | |
5e176d54 | 611 | else |
46c04366 | 612 | seq_putc(seq, ' '); |
5e176d54 | 613 | } |
46c04366 | 614 | |
5e176d54 JK |
615 | return 0; |
616 | } | |
617 | ||
618 | static int segment_info_open_fs(struct inode *inode, struct file *file) | |
619 | { | |
620 | return single_open(file, segment_info_seq_show, PDE_DATA(inode)); | |
621 | } | |
622 | ||
623 | static const struct file_operations f2fs_seq_segment_info_fops = { | |
624 | .owner = THIS_MODULE, | |
625 | .open = segment_info_open_fs, | |
626 | .read = seq_read, | |
627 | .llseek = seq_lseek, | |
628 | .release = single_release, | |
629 | }; | |
630 | ||
696c018c NJ |
631 | static int f2fs_remount(struct super_block *sb, int *flags, char *data) |
632 | { | |
633 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
634 | struct f2fs_mount_info org_mount_opt; | |
635 | int err, active_logs; | |
876dc59e GZ |
636 | bool need_restart_gc = false; |
637 | bool need_stop_gc = false; | |
696c018c | 638 | |
02b9984d TT |
639 | sync_filesystem(sb); |
640 | ||
696c018c NJ |
641 | /* |
642 | * Save the old mount options in case we | |
643 | * need to restore them. | |
644 | */ | |
645 | org_mount_opt = sbi->mount_opt; | |
646 | active_logs = sbi->active_logs; | |
647 | ||
26666c8a CY |
648 | sbi->mount_opt.opt = 0; |
649 | sbi->active_logs = NR_CURSEG_TYPE; | |
650 | ||
696c018c NJ |
651 | /* parse mount options */ |
652 | err = parse_options(sb, data); | |
653 | if (err) | |
654 | goto restore_opts; | |
655 | ||
656 | /* | |
657 | * Previous and new state of filesystem is RO, | |
876dc59e | 658 | * so skip checking GC and FLUSH_MERGE conditions. |
696c018c | 659 | */ |
6b2920a5 | 660 | if (f2fs_readonly(sb) && (*flags & MS_RDONLY)) |
696c018c NJ |
661 | goto skip; |
662 | ||
663 | /* | |
664 | * We stop the GC thread if FS is mounted as RO | |
665 | * or if background_gc = off is passed in mount | |
666 | * option. Also sync the filesystem. | |
667 | */ | |
668 | if ((*flags & MS_RDONLY) || !test_opt(sbi, BG_GC)) { | |
669 | if (sbi->gc_thread) { | |
670 | stop_gc_thread(sbi); | |
671 | f2fs_sync_fs(sb, 1); | |
876dc59e | 672 | need_restart_gc = true; |
696c018c | 673 | } |
aba291b3 | 674 | } else if (!sbi->gc_thread) { |
696c018c NJ |
675 | err = start_gc_thread(sbi); |
676 | if (err) | |
677 | goto restore_opts; | |
876dc59e GZ |
678 | need_stop_gc = true; |
679 | } | |
680 | ||
681 | /* | |
682 | * We stop issue flush thread if FS is mounted as RO | |
683 | * or if flush_merge is not passed in mount option. | |
684 | */ | |
685 | if ((*flags & MS_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) { | |
2163d198 | 686 | destroy_flush_cmd_control(sbi); |
aba291b3 | 687 | } else if (!SM_I(sbi)->cmd_control_info) { |
2163d198 GZ |
688 | err = create_flush_cmd_control(sbi); |
689 | if (err) | |
a688b9d9 | 690 | goto restore_gc; |
696c018c NJ |
691 | } |
692 | skip: | |
693 | /* Update the POSIXACL Flag */ | |
694 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
695 | (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0); | |
696 | return 0; | |
876dc59e GZ |
697 | restore_gc: |
698 | if (need_restart_gc) { | |
699 | if (start_gc_thread(sbi)) | |
700 | f2fs_msg(sbi->sb, KERN_WARNING, | |
e1c42045 | 701 | "background gc thread has stopped"); |
876dc59e GZ |
702 | } else if (need_stop_gc) { |
703 | stop_gc_thread(sbi); | |
704 | } | |
696c018c NJ |
705 | restore_opts: |
706 | sbi->mount_opt = org_mount_opt; | |
707 | sbi->active_logs = active_logs; | |
708 | return err; | |
709 | } | |
710 | ||
aff063e2 JK |
711 | static struct super_operations f2fs_sops = { |
712 | .alloc_inode = f2fs_alloc_inode, | |
531ad7d5 | 713 | .drop_inode = f2fs_drop_inode, |
aff063e2 JK |
714 | .destroy_inode = f2fs_destroy_inode, |
715 | .write_inode = f2fs_write_inode, | |
b3783873 | 716 | .dirty_inode = f2fs_dirty_inode, |
aff063e2 JK |
717 | .show_options = f2fs_show_options, |
718 | .evict_inode = f2fs_evict_inode, | |
719 | .put_super = f2fs_put_super, | |
720 | .sync_fs = f2fs_sync_fs, | |
d6212a5f CL |
721 | .freeze_fs = f2fs_freeze, |
722 | .unfreeze_fs = f2fs_unfreeze, | |
aff063e2 | 723 | .statfs = f2fs_statfs, |
696c018c | 724 | .remount_fs = f2fs_remount, |
aff063e2 JK |
725 | }; |
726 | ||
727 | static struct inode *f2fs_nfs_get_inode(struct super_block *sb, | |
728 | u64 ino, u32 generation) | |
729 | { | |
730 | struct f2fs_sb_info *sbi = F2FS_SB(sb); | |
731 | struct inode *inode; | |
732 | ||
d6b7d4b3 | 733 | if (check_nid_range(sbi, ino)) |
910bb12d | 734 | return ERR_PTR(-ESTALE); |
aff063e2 JK |
735 | |
736 | /* | |
737 | * f2fs_iget isn't quite right if the inode is currently unallocated! | |
738 | * However f2fs_iget currently does appropriate checks to handle stale | |
739 | * inodes so everything is OK. | |
740 | */ | |
741 | inode = f2fs_iget(sb, ino); | |
742 | if (IS_ERR(inode)) | |
743 | return ERR_CAST(inode); | |
6bacf52f | 744 | if (unlikely(generation && inode->i_generation != generation)) { |
aff063e2 JK |
745 | /* we didn't find the right inode.. */ |
746 | iput(inode); | |
747 | return ERR_PTR(-ESTALE); | |
748 | } | |
749 | return inode; | |
750 | } | |
751 | ||
752 | static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
753 | int fh_len, int fh_type) | |
754 | { | |
755 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
756 | f2fs_nfs_get_inode); | |
757 | } | |
758 | ||
759 | static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid, | |
760 | int fh_len, int fh_type) | |
761 | { | |
762 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
763 | f2fs_nfs_get_inode); | |
764 | } | |
765 | ||
766 | static const struct export_operations f2fs_export_ops = { | |
767 | .fh_to_dentry = f2fs_fh_to_dentry, | |
768 | .fh_to_parent = f2fs_fh_to_parent, | |
769 | .get_parent = f2fs_get_parent, | |
770 | }; | |
771 | ||
aff063e2 JK |
772 | static loff_t max_file_size(unsigned bits) |
773 | { | |
de93653f | 774 | loff_t result = (DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS); |
aff063e2 JK |
775 | loff_t leaf_count = ADDRS_PER_BLOCK; |
776 | ||
777 | /* two direct node blocks */ | |
778 | result += (leaf_count * 2); | |
779 | ||
780 | /* two indirect node blocks */ | |
781 | leaf_count *= NIDS_PER_BLOCK; | |
782 | result += (leaf_count * 2); | |
783 | ||
784 | /* one double indirect node block */ | |
785 | leaf_count *= NIDS_PER_BLOCK; | |
786 | result += leaf_count; | |
787 | ||
788 | result <<= bits; | |
789 | return result; | |
790 | } | |
791 | ||
a07ef784 NJ |
792 | static int sanity_check_raw_super(struct super_block *sb, |
793 | struct f2fs_super_block *raw_super) | |
aff063e2 JK |
794 | { |
795 | unsigned int blocksize; | |
796 | ||
a07ef784 NJ |
797 | if (F2FS_SUPER_MAGIC != le32_to_cpu(raw_super->magic)) { |
798 | f2fs_msg(sb, KERN_INFO, | |
799 | "Magic Mismatch, valid(0x%x) - read(0x%x)", | |
800 | F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic)); | |
aff063e2 | 801 | return 1; |
a07ef784 | 802 | } |
aff063e2 | 803 | |
5c9b4692 | 804 | /* Currently, support only 4KB page cache size */ |
805 | if (F2FS_BLKSIZE != PAGE_CACHE_SIZE) { | |
806 | f2fs_msg(sb, KERN_INFO, | |
14d7e9de | 807 | "Invalid page_cache_size (%lu), supports only 4KB\n", |
5c9b4692 | 808 | PAGE_CACHE_SIZE); |
809 | return 1; | |
810 | } | |
811 | ||
aff063e2 JK |
812 | /* Currently, support only 4KB block size */ |
813 | blocksize = 1 << le32_to_cpu(raw_super->log_blocksize); | |
5c9b4692 | 814 | if (blocksize != F2FS_BLKSIZE) { |
a07ef784 NJ |
815 | f2fs_msg(sb, KERN_INFO, |
816 | "Invalid blocksize (%u), supports only 4KB\n", | |
817 | blocksize); | |
aff063e2 | 818 | return 1; |
a07ef784 | 819 | } |
5c9b4692 | 820 | |
55cf9cb6 CY |
821 | /* Currently, support 512/1024/2048/4096 bytes sector size */ |
822 | if (le32_to_cpu(raw_super->log_sectorsize) > | |
823 | F2FS_MAX_LOG_SECTOR_SIZE || | |
824 | le32_to_cpu(raw_super->log_sectorsize) < | |
825 | F2FS_MIN_LOG_SECTOR_SIZE) { | |
826 | f2fs_msg(sb, KERN_INFO, "Invalid log sectorsize (%u)", | |
827 | le32_to_cpu(raw_super->log_sectorsize)); | |
aff063e2 | 828 | return 1; |
a07ef784 | 829 | } |
55cf9cb6 CY |
830 | if (le32_to_cpu(raw_super->log_sectors_per_block) + |
831 | le32_to_cpu(raw_super->log_sectorsize) != | |
832 | F2FS_MAX_LOG_SECTOR_SIZE) { | |
833 | f2fs_msg(sb, KERN_INFO, | |
834 | "Invalid log sectors per block(%u) log sectorsize(%u)", | |
835 | le32_to_cpu(raw_super->log_sectors_per_block), | |
836 | le32_to_cpu(raw_super->log_sectorsize)); | |
aff063e2 | 837 | return 1; |
a07ef784 | 838 | } |
aff063e2 JK |
839 | return 0; |
840 | } | |
841 | ||
577e3495 | 842 | static int sanity_check_ckpt(struct f2fs_sb_info *sbi) |
aff063e2 JK |
843 | { |
844 | unsigned int total, fsmeta; | |
577e3495 JK |
845 | struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); |
846 | struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); | |
aff063e2 JK |
847 | |
848 | total = le32_to_cpu(raw_super->segment_count); | |
849 | fsmeta = le32_to_cpu(raw_super->segment_count_ckpt); | |
850 | fsmeta += le32_to_cpu(raw_super->segment_count_sit); | |
851 | fsmeta += le32_to_cpu(raw_super->segment_count_nat); | |
852 | fsmeta += le32_to_cpu(ckpt->rsvd_segment_count); | |
853 | fsmeta += le32_to_cpu(raw_super->segment_count_ssa); | |
854 | ||
6bacf52f | 855 | if (unlikely(fsmeta >= total)) |
aff063e2 | 856 | return 1; |
577e3495 | 857 | |
1e968fdf | 858 | if (unlikely(f2fs_cp_error(sbi))) { |
577e3495 JK |
859 | f2fs_msg(sbi->sb, KERN_ERR, "A bug case: need to run fsck"); |
860 | return 1; | |
861 | } | |
aff063e2 JK |
862 | return 0; |
863 | } | |
864 | ||
865 | static void init_sb_info(struct f2fs_sb_info *sbi) | |
866 | { | |
867 | struct f2fs_super_block *raw_super = sbi->raw_super; | |
868 | int i; | |
869 | ||
870 | sbi->log_sectors_per_block = | |
871 | le32_to_cpu(raw_super->log_sectors_per_block); | |
872 | sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize); | |
873 | sbi->blocksize = 1 << sbi->log_blocksize; | |
874 | sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg); | |
875 | sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg; | |
876 | sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec); | |
877 | sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone); | |
878 | sbi->total_sections = le32_to_cpu(raw_super->section_count); | |
879 | sbi->total_node_count = | |
880 | (le32_to_cpu(raw_super->segment_count_nat) / 2) | |
881 | * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK; | |
882 | sbi->root_ino_num = le32_to_cpu(raw_super->root_ino); | |
883 | sbi->node_ino_num = le32_to_cpu(raw_super->node_ino); | |
884 | sbi->meta_ino_num = le32_to_cpu(raw_super->meta_ino); | |
5ec4e49f | 885 | sbi->cur_victim_sec = NULL_SECNO; |
b1c57c1c | 886 | sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH; |
aff063e2 JK |
887 | |
888 | for (i = 0; i < NR_COUNT_TYPE; i++) | |
889 | atomic_set(&sbi->nr_pages[i], 0); | |
ab9fa662 JK |
890 | |
891 | sbi->dir_level = DEF_DIR_LEVEL; | |
2ae4c673 | 892 | sbi->need_fsck = false; |
aff063e2 JK |
893 | } |
894 | ||
9076a75f GZ |
895 | /* |
896 | * Read f2fs raw super block. | |
897 | * Because we have two copies of super block, so read the first one at first, | |
898 | * if the first one is invalid, move to read the second one. | |
899 | */ | |
900 | static int read_raw_super_block(struct super_block *sb, | |
901 | struct f2fs_super_block **raw_super, | |
902 | struct buffer_head **raw_super_buf) | |
14d7e9de | 903 | { |
9076a75f | 904 | int block = 0; |
14d7e9de | 905 | |
9076a75f | 906 | retry: |
14d7e9de | 907 | *raw_super_buf = sb_bread(sb, block); |
908 | if (!*raw_super_buf) { | |
9076a75f GZ |
909 | f2fs_msg(sb, KERN_ERR, "Unable to read %dth superblock", |
910 | block + 1); | |
911 | if (block == 0) { | |
912 | block++; | |
913 | goto retry; | |
914 | } else { | |
915 | return -EIO; | |
916 | } | |
14d7e9de | 917 | } |
918 | ||
919 | *raw_super = (struct f2fs_super_block *) | |
920 | ((char *)(*raw_super_buf)->b_data + F2FS_SUPER_OFFSET); | |
921 | ||
922 | /* sanity checking of raw super */ | |
9076a75f GZ |
923 | if (sanity_check_raw_super(sb, *raw_super)) { |
924 | brelse(*raw_super_buf); | |
6c311ec6 CF |
925 | f2fs_msg(sb, KERN_ERR, |
926 | "Can't find valid F2FS filesystem in %dth superblock", | |
927 | block + 1); | |
6bacf52f | 928 | if (block == 0) { |
9076a75f GZ |
929 | block++; |
930 | goto retry; | |
931 | } else { | |
932 | return -EINVAL; | |
933 | } | |
934 | } | |
14d7e9de | 935 | |
9076a75f | 936 | return 0; |
14d7e9de | 937 | } |
938 | ||
aff063e2 JK |
939 | static int f2fs_fill_super(struct super_block *sb, void *data, int silent) |
940 | { | |
941 | struct f2fs_sb_info *sbi; | |
1730663c | 942 | struct f2fs_super_block *raw_super = NULL; |
aff063e2 JK |
943 | struct buffer_head *raw_super_buf; |
944 | struct inode *root; | |
945 | long err = -EINVAL; | |
ed2e621a | 946 | bool retry = true; |
971767ca | 947 | int i; |
aff063e2 | 948 | |
ed2e621a | 949 | try_onemore: |
aff063e2 JK |
950 | /* allocate memory for f2fs-specific super block info */ |
951 | sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL); | |
952 | if (!sbi) | |
953 | return -ENOMEM; | |
954 | ||
ff9234ad | 955 | /* set a block size */ |
6bacf52f | 956 | if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) { |
a07ef784 | 957 | f2fs_msg(sb, KERN_ERR, "unable to set blocksize"); |
aff063e2 | 958 | goto free_sbi; |
a07ef784 | 959 | } |
aff063e2 | 960 | |
9076a75f GZ |
961 | err = read_raw_super_block(sb, &raw_super, &raw_super_buf); |
962 | if (err) | |
963 | goto free_sbi; | |
964 | ||
5fb08372 | 965 | sb->s_fs_info = sbi; |
aff063e2 JK |
966 | /* init some FS parameters */ |
967 | sbi->active_logs = NR_CURSEG_TYPE; | |
968 | ||
969 | set_opt(sbi, BG_GC); | |
970 | ||
971 | #ifdef CONFIG_F2FS_FS_XATTR | |
972 | set_opt(sbi, XATTR_USER); | |
973 | #endif | |
974 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
975 | set_opt(sbi, POSIX_ACL); | |
976 | #endif | |
977 | /* parse mount options */ | |
5fb08372 | 978 | err = parse_options(sb, (char *)data); |
66348b72 | 979 | if (err) |
aff063e2 JK |
980 | goto free_sb_buf; |
981 | ||
25ca923b | 982 | sb->s_maxbytes = max_file_size(le32_to_cpu(raw_super->log_blocksize)); |
aff063e2 JK |
983 | sb->s_max_links = F2FS_LINK_MAX; |
984 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
985 | ||
986 | sb->s_op = &f2fs_sops; | |
987 | sb->s_xattr = f2fs_xattr_handlers; | |
988 | sb->s_export_op = &f2fs_export_ops; | |
989 | sb->s_magic = F2FS_SUPER_MAGIC; | |
aff063e2 JK |
990 | sb->s_time_gran = 1; |
991 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
992 | (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0); | |
993 | memcpy(sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid)); | |
994 | ||
995 | /* init f2fs-specific super block info */ | |
996 | sbi->sb = sb; | |
997 | sbi->raw_super = raw_super; | |
998 | sbi->raw_super_buf = raw_super_buf; | |
999 | mutex_init(&sbi->gc_mutex); | |
aff063e2 JK |
1000 | mutex_init(&sbi->writepages); |
1001 | mutex_init(&sbi->cp_mutex); | |
b3582c68 | 1002 | init_rwsem(&sbi->node_write); |
aabe5136 | 1003 | sbi->por_doing = false; |
aff063e2 | 1004 | spin_lock_init(&sbi->stat_lock); |
971767ca | 1005 | |
df0f8dc0 | 1006 | init_rwsem(&sbi->read_io.io_rwsem); |
458e6197 JK |
1007 | sbi->read_io.sbi = sbi; |
1008 | sbi->read_io.bio = NULL; | |
1009 | for (i = 0; i < NR_PAGE_TYPE; i++) { | |
df0f8dc0 | 1010 | init_rwsem(&sbi->write_io[i].io_rwsem); |
458e6197 JK |
1011 | sbi->write_io[i].sbi = sbi; |
1012 | sbi->write_io[i].bio = NULL; | |
1013 | } | |
971767ca | 1014 | |
e479556b | 1015 | init_rwsem(&sbi->cp_rwsem); |
fb51b5ef | 1016 | init_waitqueue_head(&sbi->cp_wait); |
aff063e2 JK |
1017 | init_sb_info(sbi); |
1018 | ||
1019 | /* get an inode for meta space */ | |
1020 | sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi)); | |
1021 | if (IS_ERR(sbi->meta_inode)) { | |
a07ef784 | 1022 | f2fs_msg(sb, KERN_ERR, "Failed to read F2FS meta data inode"); |
aff063e2 JK |
1023 | err = PTR_ERR(sbi->meta_inode); |
1024 | goto free_sb_buf; | |
1025 | } | |
1026 | ||
1027 | err = get_valid_checkpoint(sbi); | |
a07ef784 NJ |
1028 | if (err) { |
1029 | f2fs_msg(sb, KERN_ERR, "Failed to get valid F2FS checkpoint"); | |
aff063e2 | 1030 | goto free_meta_inode; |
a07ef784 | 1031 | } |
aff063e2 JK |
1032 | |
1033 | /* sanity checking of checkpoint */ | |
1034 | err = -EINVAL; | |
577e3495 | 1035 | if (sanity_check_ckpt(sbi)) { |
a07ef784 | 1036 | f2fs_msg(sb, KERN_ERR, "Invalid F2FS checkpoint"); |
aff063e2 | 1037 | goto free_cp; |
a07ef784 | 1038 | } |
aff063e2 JK |
1039 | |
1040 | sbi->total_valid_node_count = | |
1041 | le32_to_cpu(sbi->ckpt->valid_node_count); | |
1042 | sbi->total_valid_inode_count = | |
1043 | le32_to_cpu(sbi->ckpt->valid_inode_count); | |
1044 | sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count); | |
1045 | sbi->total_valid_block_count = | |
1046 | le64_to_cpu(sbi->ckpt->valid_block_count); | |
1047 | sbi->last_valid_block_count = sbi->total_valid_block_count; | |
1048 | sbi->alloc_valid_block_count = 0; | |
1049 | INIT_LIST_HEAD(&sbi->dir_inode_list); | |
1050 | spin_lock_init(&sbi->dir_inode_lock); | |
1051 | ||
6451e041 | 1052 | init_ino_entry_info(sbi); |
aff063e2 JK |
1053 | |
1054 | /* setup f2fs internal modules */ | |
1055 | err = build_segment_manager(sbi); | |
a07ef784 NJ |
1056 | if (err) { |
1057 | f2fs_msg(sb, KERN_ERR, | |
1058 | "Failed to initialize F2FS segment manager"); | |
aff063e2 | 1059 | goto free_sm; |
a07ef784 | 1060 | } |
aff063e2 | 1061 | err = build_node_manager(sbi); |
a07ef784 NJ |
1062 | if (err) { |
1063 | f2fs_msg(sb, KERN_ERR, | |
1064 | "Failed to initialize F2FS node manager"); | |
aff063e2 | 1065 | goto free_nm; |
a07ef784 | 1066 | } |
aff063e2 JK |
1067 | |
1068 | build_gc_manager(sbi); | |
1069 | ||
1070 | /* get an inode for node space */ | |
1071 | sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi)); | |
1072 | if (IS_ERR(sbi->node_inode)) { | |
a07ef784 | 1073 | f2fs_msg(sb, KERN_ERR, "Failed to read node inode"); |
aff063e2 JK |
1074 | err = PTR_ERR(sbi->node_inode); |
1075 | goto free_nm; | |
1076 | } | |
1077 | ||
1078 | /* if there are nt orphan nodes free them */ | |
8f99a946 | 1079 | recover_orphan_inodes(sbi); |
aff063e2 JK |
1080 | |
1081 | /* read root inode and dentry */ | |
1082 | root = f2fs_iget(sb, F2FS_ROOT_INO(sbi)); | |
1083 | if (IS_ERR(root)) { | |
a07ef784 | 1084 | f2fs_msg(sb, KERN_ERR, "Failed to read root inode"); |
aff063e2 JK |
1085 | err = PTR_ERR(root); |
1086 | goto free_node_inode; | |
1087 | } | |
8f99a946 | 1088 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { |
9d847950 | 1089 | iput(root); |
8f99a946 | 1090 | err = -EINVAL; |
9d847950 | 1091 | goto free_node_inode; |
8f99a946 | 1092 | } |
aff063e2 JK |
1093 | |
1094 | sb->s_root = d_make_root(root); /* allocate root dentry */ | |
1095 | if (!sb->s_root) { | |
1096 | err = -ENOMEM; | |
1097 | goto free_root_inode; | |
1098 | } | |
1099 | ||
aff063e2 JK |
1100 | err = f2fs_build_stats(sbi); |
1101 | if (err) | |
6437d1b0 | 1102 | goto free_root_inode; |
aff063e2 | 1103 | |
5e176d54 JK |
1104 | if (f2fs_proc_root) |
1105 | sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root); | |
1106 | ||
1107 | if (sbi->s_proc) | |
1108 | proc_create_data("segment_info", S_IRUGO, sbi->s_proc, | |
1109 | &f2fs_seq_segment_info_fops, sb); | |
1110 | ||
d3ee456d NJ |
1111 | if (test_opt(sbi, DISCARD)) { |
1112 | struct request_queue *q = bdev_get_queue(sb->s_bdev); | |
1113 | if (!blk_queue_discard(q)) | |
1114 | f2fs_msg(sb, KERN_WARNING, | |
1115 | "mounting with \"discard\" option, but " | |
1116 | "the device does not support discard"); | |
1117 | } | |
1118 | ||
b59d0bae NJ |
1119 | sbi->s_kobj.kset = f2fs_kset; |
1120 | init_completion(&sbi->s_kobj_unregister); | |
1121 | err = kobject_init_and_add(&sbi->s_kobj, &f2fs_ktype, NULL, | |
1122 | "%s", sb->s_id); | |
1123 | if (err) | |
6437d1b0 | 1124 | goto free_proc; |
b59d0bae | 1125 | |
b0c44f05 JK |
1126 | if (!retry) |
1127 | sbi->need_fsck = true; | |
1128 | ||
6437d1b0 JK |
1129 | /* recover fsynced data */ |
1130 | if (!test_opt(sbi, DISABLE_ROLL_FORWARD)) { | |
1131 | err = recover_fsync_data(sbi); | |
ed2e621a | 1132 | if (err) { |
6437d1b0 JK |
1133 | f2fs_msg(sb, KERN_ERR, |
1134 | "Cannot recover all fsync data errno=%ld", err); | |
ed2e621a JK |
1135 | goto free_kobj; |
1136 | } | |
6437d1b0 | 1137 | } |
b59d0bae | 1138 | |
6437d1b0 JK |
1139 | /* |
1140 | * If filesystem is not mounted as read-only then | |
1141 | * do start the gc_thread. | |
1142 | */ | |
6c029932 | 1143 | if (test_opt(sbi, BG_GC) && !f2fs_readonly(sb)) { |
6437d1b0 JK |
1144 | /* After POR, we can run background GC thread.*/ |
1145 | err = start_gc_thread(sbi); | |
1146 | if (err) | |
1147 | goto free_kobj; | |
1148 | } | |
aff063e2 | 1149 | return 0; |
6437d1b0 JK |
1150 | |
1151 | free_kobj: | |
1152 | kobject_del(&sbi->s_kobj); | |
1153 | free_proc: | |
1d15bd20 CY |
1154 | if (sbi->s_proc) { |
1155 | remove_proc_entry("segment_info", sbi->s_proc); | |
1156 | remove_proc_entry(sb->s_id, f2fs_proc_root); | |
1157 | } | |
1158 | f2fs_destroy_stats(sbi); | |
aff063e2 JK |
1159 | free_root_inode: |
1160 | dput(sb->s_root); | |
1161 | sb->s_root = NULL; | |
1162 | free_node_inode: | |
1163 | iput(sbi->node_inode); | |
1164 | free_nm: | |
1165 | destroy_node_manager(sbi); | |
1166 | free_sm: | |
1167 | destroy_segment_manager(sbi); | |
1168 | free_cp: | |
1169 | kfree(sbi->ckpt); | |
1170 | free_meta_inode: | |
1171 | make_bad_inode(sbi->meta_inode); | |
1172 | iput(sbi->meta_inode); | |
1173 | free_sb_buf: | |
1174 | brelse(raw_super_buf); | |
1175 | free_sbi: | |
1176 | kfree(sbi); | |
ed2e621a JK |
1177 | |
1178 | /* give only one another chance */ | |
1179 | if (retry) { | |
922cedbd | 1180 | retry = 0; |
ed2e621a JK |
1181 | shrink_dcache_sb(sb); |
1182 | goto try_onemore; | |
1183 | } | |
aff063e2 JK |
1184 | return err; |
1185 | } | |
1186 | ||
1187 | static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags, | |
1188 | const char *dev_name, void *data) | |
1189 | { | |
1190 | return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super); | |
1191 | } | |
1192 | ||
1193 | static struct file_system_type f2fs_fs_type = { | |
1194 | .owner = THIS_MODULE, | |
1195 | .name = "f2fs", | |
1196 | .mount = f2fs_mount, | |
1197 | .kill_sb = kill_block_super, | |
1198 | .fs_flags = FS_REQUIRES_DEV, | |
1199 | }; | |
7f78e035 | 1200 | MODULE_ALIAS_FS("f2fs"); |
aff063e2 | 1201 | |
6e6093a8 | 1202 | static int __init init_inodecache(void) |
aff063e2 JK |
1203 | { |
1204 | f2fs_inode_cachep = f2fs_kmem_cache_create("f2fs_inode_cache", | |
e8512d2e | 1205 | sizeof(struct f2fs_inode_info)); |
6bacf52f | 1206 | if (!f2fs_inode_cachep) |
aff063e2 JK |
1207 | return -ENOMEM; |
1208 | return 0; | |
1209 | } | |
1210 | ||
1211 | static void destroy_inodecache(void) | |
1212 | { | |
1213 | /* | |
1214 | * Make sure all delayed rcu free inodes are flushed before we | |
1215 | * destroy cache. | |
1216 | */ | |
1217 | rcu_barrier(); | |
1218 | kmem_cache_destroy(f2fs_inode_cachep); | |
1219 | } | |
1220 | ||
1221 | static int __init init_f2fs_fs(void) | |
1222 | { | |
1223 | int err; | |
1224 | ||
1225 | err = init_inodecache(); | |
1226 | if (err) | |
1227 | goto fail; | |
1228 | err = create_node_manager_caches(); | |
1229 | if (err) | |
9890ff3f | 1230 | goto free_inodecache; |
7fd9e544 | 1231 | err = create_segment_manager_caches(); |
aff063e2 | 1232 | if (err) |
9890ff3f | 1233 | goto free_node_manager_caches; |
7fd9e544 JK |
1234 | err = create_gc_caches(); |
1235 | if (err) | |
1236 | goto free_segment_manager_caches; | |
aff063e2 JK |
1237 | err = create_checkpoint_caches(); |
1238 | if (err) | |
9890ff3f | 1239 | goto free_gc_caches; |
b59d0bae | 1240 | f2fs_kset = kset_create_and_add("f2fs", NULL, fs_kobj); |
6e6b978c WY |
1241 | if (!f2fs_kset) { |
1242 | err = -ENOMEM; | |
9890ff3f | 1243 | goto free_checkpoint_caches; |
6e6b978c | 1244 | } |
4589d25d NJ |
1245 | err = register_filesystem(&f2fs_fs_type); |
1246 | if (err) | |
9890ff3f | 1247 | goto free_kset; |
4589d25d | 1248 | f2fs_create_root_stats(); |
5e176d54 | 1249 | f2fs_proc_root = proc_mkdir("fs/f2fs", NULL); |
9890ff3f ZH |
1250 | return 0; |
1251 | ||
1252 | free_kset: | |
1253 | kset_unregister(f2fs_kset); | |
1254 | free_checkpoint_caches: | |
1255 | destroy_checkpoint_caches(); | |
1256 | free_gc_caches: | |
1257 | destroy_gc_caches(); | |
7fd9e544 JK |
1258 | free_segment_manager_caches: |
1259 | destroy_segment_manager_caches(); | |
9890ff3f ZH |
1260 | free_node_manager_caches: |
1261 | destroy_node_manager_caches(); | |
1262 | free_inodecache: | |
1263 | destroy_inodecache(); | |
aff063e2 JK |
1264 | fail: |
1265 | return err; | |
1266 | } | |
1267 | ||
1268 | static void __exit exit_f2fs_fs(void) | |
1269 | { | |
5e176d54 | 1270 | remove_proc_entry("fs/f2fs", NULL); |
4589d25d | 1271 | f2fs_destroy_root_stats(); |
aff063e2 JK |
1272 | unregister_filesystem(&f2fs_fs_type); |
1273 | destroy_checkpoint_caches(); | |
1274 | destroy_gc_caches(); | |
5dcd8a71 | 1275 | destroy_segment_manager_caches(); |
aff063e2 JK |
1276 | destroy_node_manager_caches(); |
1277 | destroy_inodecache(); | |
b59d0bae | 1278 | kset_unregister(f2fs_kset); |
aff063e2 JK |
1279 | } |
1280 | ||
1281 | module_init(init_f2fs_fs) | |
1282 | module_exit(exit_f2fs_fs) | |
1283 | ||
1284 | MODULE_AUTHOR("Samsung Electronics's Praesto Team"); | |
1285 | MODULE_DESCRIPTION("Flash Friendly File System"); | |
1286 | MODULE_LICENSE("GPL"); |